Coherent (COHR) 10-K16 Aug 242024 FY Annual reportFinancial data

Company Profile

Cover

Cover - USD ($)	12 Months Ended
Cover - USD ($)	Jun. 30, 2024	Aug. 13, 2024	Dec. 31, 2023
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Jun. 30, 2024
Current Fiscal Year End Date	--06-30
Document Transition Report	false
Entity File Number	001-39375
Entity Registrant Name	COHERENT CORP.
Entity Incorporation, State or Country Code	PA
Entity Tax Identification Number	25-1214948
Entity Address, Address Line One	375 Saxonburg Blvd.
Entity Address, City or Town	Saxonburg
Entity Address, State or Province	PA
Entity Address, Postal Zip Code	16056
City Area Code	724
Local Phone Number	352-4455
Title of 12(b) Security	Common Stock, no par value
Trading Symbol	COHR
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Document Financial Statement Error Correction	false
Entity Shell Company	false
Entity Public Float			$ 6,559,717,307
Entity Common Stock, Shares Outstanding		153,300,385
Amendment Flag	false
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	FY
Entity Central Index Key	0000820318
Documents Incorporated by Reference	DOCUMENTS INCORPORATED BY REFERENCE Portions of the registrant’s definitive proxy statement, which will be issued in connection with the 2024 Annual Meeting of Shareholders of Coherent Corp., are incorporated by reference into Part III of this Annual Report on Form 10-K.

Audit Information

Audit Information	12 Months Ended
Audit Information	Jun. 30, 2024
Audit Information [Abstract]
Auditor Name	Ernst & Young LLP
Auditor Location	Pittsburgh, Pennsylvania
Auditor Firm ID	42

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2024	Jun. 30, 2023
Current Assets
Cash and cash equivalents	$ 926,033	$ 821,310
Restricted cash, current	174,008	12,023
Accounts receivable - less allowance for doubtful accounts of $9,511 and $8,005 at June 30, 2024 and June 30, 2023, respectively	848,542	901,531
Inventories	1,286,404	1,272,333
Prepaid and refundable income taxes	26,909	28,271
Prepaid and other current assets	398,203	216,530
Total Current Assets	3,660,099	3,251,998
Property, plant & equipment, net	1,817,259	1,782,035
Goodwill	4,464,329	4,512,700
Other intangible assets, net	3,503,247	3,814,684
Deferred income taxes	40,966	37,748
Restricted cash, non-current	689,645	4,233
Other assets	313,089	307,735
Total Assets	14,488,634	13,711,133
Current Liabilities
Current portion of long-term debt	73,770	74,836
Accounts payable	631,548	405,308
Accrued compensation and benefits	212,458	175,564
Operating lease current liabilities	40,580	38,271
Accrued income taxes payable	90,705	74,488
Other accrued liabilities	294,706	310,281
Total Current Liabilities	1,343,767	1,078,748
Long-term debt	4,026,448	4,234,962
Deferred income taxes	784,374	780,307
Operating lease liabilities	162,355	140,748
Other liabilities	225,411	247,402
Total Liabilities	6,542,355	6,482,167
Mezzanine Equity
Series B redeemable convertible preferred stock, no par value, 5% cumulative; issued - 215,000 shares at June 30, 2024 and June 30, 2023; redemption value - $2,427,860 and $2,309,966 as of June 30, 2024 and June 30, 2023, respectively	2,364,772	2,241,415
Shareholders’ Equity
Series A preferred stock, no par value, 6% cumulative; issued - 0 and 2,300,000 shares at June 30, 2024 and June 30, 2023, respectively	0	445,319
Common stock, no par value; authorized - 300,000,000 shares; issued - 168,406,323 shares at June 30, 2024; issued - 154,719,413 shares at June 30, 2023	4,857,657	3,781,211
Accumulated other comprehensive income (AOCI)	2,640	109,726
Retained earnings	664,940	944,416
Shareholders' equity excluding treasury stock	5,525,237	5,280,672
Treasury stock, at cost - 15,626,740 shares at June 30, 2024 and 15,135,711 shares at June 30, 2023	(315,122)	(293,121)
Total Coherent Corp. Shareholders’ Equity	5,210,115	4,987,551
Noncontrolling interests (NCI)	371,392	0
Total Equity	5,581,507	4,987,551
Total Liabilities, Mezzanine Equity and Equity	$ 14,488,634	$ 13,711,133

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Statement of Financial Position [Abstract]
Accounts receivable, allowance for doubtful accounts	$ 9,511	$ 8,005
Redeemable convertible preferred stock, cumulative percentage	5%	5%
Convertible preferred stock, shares issued (in shares)	215,000	215,000
Redeemable convertible preferred stock, redemption value	$ 2,427,860	$ 2,309,966
Preferred stock, dividend rate	6%	6%
Preferred stock, shares issued (in shares)	0	2,300,000
Common stock, shares authorized (in shares)	300,000,000	300,000,000
Common stock, shares issued (in shares)	168,406,323	154,719,413
Treasury stock (in shares)	15,626,740	15,135,711

Consolidated Statements of Earn

Consolidated Statements of Earnings (Loss) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022
Income Statement [Abstract]
Revenues	$ 4,707,688	$ 5,160,100	$ 3,316,616
Costs, Expenses and Other Expense (Income)
Cost of goods sold	3,251,724	3,541,817	2,051,120
Internal research and development	478,788	499,603	377,106
Selling, general and administrative	854,001	1,036,699	474,096
Restructuring charges	27,054	119,101	0
Interest expense	288,475	286,872	121,254
Other (income) expense, net	(44,707)	31,566	11,233
Total Costs, Expenses and Other Expense	4,855,335	5,515,658	3,034,809
Earnings (loss) before income taxes	(147,647)	(355,558)	281,807
Income Tax Expense (Benefit)	11,117	(96,100)	47,048
Net Earnings (Loss)	(158,764)	(259,458)	234,759
Net Loss Attributable to Noncontrolling Interests	(2,610)	0	0
Net Earnings (Loss) Attributable to Coherent Corp.	(156,154)	(259,458)	234,759
Less: Dividends on Preferred Stock	123,357	144,212	68,225
Net Earnings (Loss) Available to the Common Shareholders	$ (279,511)	$ (403,670)	$ 166,534
Basic Earnings (Loss) Per Share (in usd per share)	$ (1.84)	$ (2.93)	$ 1.57
Diluted Earnings (Loss) Per Share (in usd per share)	$ (1.84)	$ (2.93)	$ 1.45

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022
Net earnings (loss)	$ (158,764)	$ (259,458)	$ 234,759
Other Comprehensive Income (Loss):
Foreign currency translation adjustments	(81,889)	87,927	(89,967)
Pension adjustment, net of taxes	(7,443)	(6,105)	15,719
Other comprehensive income (loss)	(109,528)	111,893	(16,434)
Comprehensive Income (Loss)	(268,292)	(147,565)	218,325
Comprehensive Loss Attributable to Noncontrolling Interests	(2,610)	0	0
Foreign Currency Translation Adjustments Attributable to Noncontrolling Interests	429	0	0
Comprehensive Income (Loss) Attributable to Coherent Corp.	(266,111)	(147,565)	218,325
Interest Rate Swap
Other Comprehensive Income (Loss):
Change in fair value of interest rate swap and interest rate cap, net of taxes	(22,885)	7,749	43,508
Interest Rate Cap
Other Comprehensive Income (Loss):
Change in fair value of interest rate swap and interest rate cap, net of taxes	$ 2,689	$ 22,322	$ 14,306

Consolidated Statements of Co_2

Consolidated Statements of Comprehensive Income (Loss) (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022
Pension adjustment, taxes	$ (1,718)	$ (1,682)	$ 3,856
Interest Rate Swap
Change in fair value of interest rate swap and interest rate cap, taxes	(6,268)	2,122	11,901
Interest Rate Cap
Change in fair value of interest rate swap and interest rate cap, taxes	$ 800	$ 5,934	$ 3,818

Consolidated Statements of Shar

Consolidated Statements of Shareholders' Equity and Mezzanine Equity - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Interest Rate Swap	Interest Rate Cap	Common Stock	Common Stock Cumulative Effect, Period of Adoption, Adjustment	Preferred Stock	AOCI	AOCI Interest Rate Swap	AOCI Interest Rate Cap	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	Treasury Stock	NCI
Beginning balance, Common Stock (in shares) at Jun. 30, 2021					119,127,000
Beginning balance at Jun. 30, 2021	$ 3,406,170	$ (11,472)			$ 2,028,273	$ (56,388)	$ 445,319	$ 14,267			$ 1,136,777	$ 44,916	$ (218,466)	$ 0
Beginning balance, Preferred Stock (in shares) at Jun. 30, 2021							2,300,000
Beginning balance, Treasury Stock (in shares) at Jun. 30, 2021													(13,640,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based and deferred compensation activities (in shares)					1,796,000								333,000
Share-based and deferred compensation activities	71,779				$ 92,667								$ (20,888)
Net earnings (loss)	234,759										234,759
Foreign currency translation adjustments	(89,967)							(89,967)
Change in fair value of interest rate swap and interest rate cap, net of taxes			$ 43,508	$ 14,306					$ 43,508	$ 14,306
Pension adjustment, net of taxes	15,719							15,719
Dividends	(68,327)										(68,327)
Ending balance, Common Stock, (in shares) at Jun. 30, 2022					120,923,000
Ending balance at Jun. 30, 2022	$ 3,616,475				$ 2,064,552		$ 445,319	(2,167)			1,348,125		$ (239,354)	0
Ending balance, Preferred Stock (in shares) at Jun. 30, 2022							2,300,000
Ending balance, Treasury Stock (in shares) at Jun. 30, 2022													(13,973,000)
Beginning balance (in shares) at Jun. 30, 2021	75,000
Beginning balance at Jun. 30, 2021	$ 726,178
Increase (Decrease) in Temporary Equity [Roll Forward]
Dividends	$ 40,625
Ending balance (in shares) at Jun. 30, 2022	75,000
Ending balance at Jun. 30, 2022	$ 766,803
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based and deferred compensation activities (in shares)					4,029,000								1,164,000
Share-based and deferred compensation activities	117,361				$ 171,128								$ (53,767)
Coherent acquisition (in shares)					22,588,000
Coherent acquisition	1,207,591				$ 1,207,591
Convertible debt and conversion of Series A preferred stock (in shares)					7,181,000
Convertible debt and conversion of Series A preferred stock	337,940				$ 337,940
Net earnings (loss)	(259,458)										(259,458)
Foreign currency translation adjustments	87,927							87,927
Change in fair value of interest rate swap and interest rate cap, net of taxes			7,749	22,322					7,749	22,322
Pension adjustment, net of taxes	(6,105)							(6,105)
Dividends	(144,251)										(144,251)
Ending balance, Common Stock, (in shares) at Jun. 30, 2023					154,721,000
Ending balance at Jun. 30, 2023	$ 4,987,551				$ 3,781,211		$ 445,319	109,726			944,416		$ (293,121)	0
Ending balance, Preferred Stock (in shares) at Jun. 30, 2023							2,300,000
Ending balance, Treasury Stock (in shares) at Jun. 30, 2023	(15,135,711)												(15,137,000)
Increase (Decrease) in Temporary Equity [Roll Forward]
Issuance of Series B shares (in shares)	140,000
Issuance of Series B shares	$ 1,358,000
Dividends	$ 116,612
Ending balance (in shares) at Jun. 30, 2023	215,000
Ending balance at Jun. 30, 2023	$ 2,241,415
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based and deferred compensation activities (in shares)					3,447,000								492,000
Share-based and deferred compensation activities	144,799				$ 166,800								$ (22,001)
Convertible debt and conversion of Series A preferred stock (in shares)					10,240,000		(2,300,000)
Convertible debt and conversion of Series A preferred stock	0				$ 445,319		$ (445,319)
Net earnings (loss)	(158,764)										(156,154)			(2,610)
Foreign currency translation adjustments	(81,889)							(82,318)						429
Change in fair value of interest rate swap and interest rate cap, net of taxes			$ (22,885)	$ 2,689					$ (22,885)	$ 2,689
Pension adjustment, net of taxes	(7,443)							(7,443)
Dividends	(123,322)										(123,322)
Sale of noncontrolling interests, net of issuance costs and taxes	840,771				$ 464,327			2,871						373,573
Ending balance, Common Stock, (in shares) at Jun. 30, 2024					168,408,000
Ending balance at Jun. 30, 2024	$ 5,581,507				$ 4,857,657		$ 0	$ 2,640			$ 664,940		$ (315,122)	$ 371,392
Ending balance, Preferred Stock (in shares) at Jun. 30, 2024							0
Ending balance, Treasury Stock (in shares) at Jun. 30, 2024	(15,626,740)												(15,629,000)
Increase (Decrease) in Temporary Equity [Roll Forward]
Dividends	$ 123,357
Ending balance (in shares) at Jun. 30, 2024	215,000
Ending balance at Jun. 30, 2024	$ 2,364,772

Consolidated Statements of Sh_2

Consolidated Statements of Shareholders' Equity and Mezzanine Equity (Parenthetical) $ in Thousands	12 Months Ended
	Jun. 30, 2024 USD ($)
Pension adjustment, taxes	$ (1,718)
Issuance costs on sale of shares to noncontrolling interests	31,840
Sale of shares to noncontrolling interests, taxes	127,389
Interest Rate Swap
Change in fair value of interest rate swap and interest rate cap, taxes	(6,268)
Interest Rate Cap
Change in fair value of interest rate swap and interest rate cap, taxes	$ 800

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022
Cash Flows from Operating Activities
Net earnings (loss)	$ (158,764)	$ (259,458)	$ 234,759
Adjustments to reconcile net earnings (loss) to net cash provided by operating activities:
Depreciation	271,601	267,562	207,132
Amortization	288,160	414,125	79,647
Share-based compensation expense	126,049	148,872	73,214
Non-cash restructuring charges	16,557	119,456	0
Amortization of discount on convertible debt and debt issuance costs	17,652	19,850	18,807
Losses on disposals of property, plant & equipment	758	2,440	617
Unrealized losses (gains) on foreign currency remeasurements and transactions	(10,556)	(3,549)	1,167
Loss (earnings) from equity investments	51	66	(2,190)
Deferred income taxes	(112,096)	(206,822)	(8,154)
Loss on debt extinguishment	1,978	6,855	0
Increase (decrease) in cash from changes in (net of effects of acquisitions):
Accounts receivable	60,581	68,315	(55,193)
Inventories	(23,196)	174,136	(230,882)
Accounts payable	205,044	(83,330)	97,053
Contract liabilities	(72,818)	(18,957)	26,614
Income taxes	12,251	28,651	17,961
Accrued compensation and benefits	36,894	(60,595)	(9,382)
Other operating net assets (liabilities)	(114,415)	16,408	(37,838)
Net cash provided by operating activities	545,731	634,025	413,332
Cash Flows from Investing Activities
Additions to property, plant & equipment	(346,816)	(436,060)	(314,332)
Purchases of businesses, net of cash acquired	0	(5,488,556)	0
Other investing activities	(3,897)	(4,010)	(5,750)
Net cash used in investing activities	(350,713)	(5,928,626)	(320,082)
Cash Flows from Financing Activities
Sale of shares to noncontrolling interests	1,000,000	0	0
Proceeds from issuance of Series B preferred shares	0	1,400,000	0
Proceeds from borrowings of revolving credit facilities	18,966	65,000	0
Proceeds from issuance of Senior Notes	0	0	990,000
Payments on existing debt	(228,802)	(1,265,175)	(62,050)
Payments on borrowings under Revolving Credit Facilities	(19,027)	(65,000)	0
Payments on convertible notes	0	(3,561)	0
Payment of Finisar Notes	0	0	(14,888)
Debt issuance costs	0	(126,516)	(10,197)
Equity issuance costs	(31,840)	(42,000)	0
Proceeds from exercises of stock options and purchases of stock under employee stock purchase plan	42,297	24,167	17,858
Payments in satisfaction of employees’ minimum tax obligations	(22,315)	(54,172)	(21,249)
Cash dividends paid	0	(27,600)	(34,508)
Other financing activities	(1,007)	(1,124)	(2,013)
Net cash provided by financing activities	758,272	3,554,019	862,953
Effect of exchange rate changes on cash, cash equivalents, and restricted cash	(1,170)	(4,223)	34,276
Net increase in cash and cash equivalents, and restricted cash	952,120	(1,744,805)	990,479
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period	837,566	2,582,371	1,591,892
Cash, Cash Equivalents, and Restricted Cash at End of Period	1,789,686	837,566	2,582,371
Supplemental Information
Cash paid for interest	312,879	282,835	57,314
Cash paid for income taxes	97,295	89,567	50,000
Non-Cash Investing and Financing Activities:
Additions to property, plant & equipment included in accounts payable	63,286	36,777	84,890
Conversion of Series A preferred stock to common stock	445,319	0	0
Reconciliation of Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents
Restricted cash	864,000	16,000
Cash and cash equivalents	926,033	821,310	2,582,371
Restricted cash, current	174,008	12,023	0
Restricted cash, non-current	689,645	4,233	0
Total cash, cash equivalents, and restricted cash shown in the consolidated statements of cash flows	1,789,686	837,566	2,582,371
Term B Facility
Cash Flows from Financing Activities
Proceeds from borrowing of Term Facility	0	2,800,000	0
Term A Facility
Cash Flows from Financing Activities
Proceeds from borrowing of Term Facility	$ 0	$ 850,000	$ 0

Nature of Business and Summary

Nature of Business and Summary of Significant Accounting Policies	12 Months Ended
	Jun. 30, 2024
Accounting Policies [Abstract]
Nature of Business and Summary of Significant Accounting Policies	Nature of Business and Summary of Significant Accounting Policies Nature of Business. Coherent Corp. (“Coherent,” the “Company,” “we,” “us” or “our”), a global leader in materials, networking, and lasers, is a vertically-integrated manufacturing company that develops, manufactures, and markets engineered materials, optoelectronic components and devices, and lasers for use in the industrial, communications, electronics and instrumentation markets. The Company markets its products through its direct sales force and through distributors and agents. The Company uses certain uncommon materials and compounds to manufacture its products. Some of these materials are available from only one proven outside source. The continued high quality of these materials is critical to the stability of our manufacturing yields. We have not experienced material production delays due to a shortage of materials. However, we do occasionally experience problems associated with vendor-supplied materials not meeting specifications for quality or purity. A significant failure of our suppliers to deliver sufficient quantities of necessary high-quality materials on a timely basis could have a material adverse effect on our results of operations. Consolidation. The Consolidated Financial Statements include the accounts of the Company and all of its subsidiaries. All significant intercompany accounts and transactions have been eliminated in consolidation. Certain prior year amounts have been reclassified for consistency with the current year presentation. Use of Estimates. The preparation of financial statements in conformity with generally accepted accounting principles in the United States (“U.S. GAAP”) requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Although these estimates are based on management’s best knowledge of current events and actions Coherent may undertake in the future, actual results may ultimately differ from the estimates. Foreign Currency Translation. For all foreign subsidiaries whose functional currency is not the U.S. dollar, the functional currency is the local currency. Assets and liabilities of those operations are translated into U.S. dollars using period-end exchange rates while income and expenses are translated using the average exchange rates for the reporting period. Translation adjustments are recorded as Accumulated other comprehensive income (loss) within Shareholders’ equity in the accompanying Consolidated Balance Sheets. Cash, Cash Equivalents, and Restricted Cash. We consider highly liquid investment instruments with an original maturity of three months or less to be cash equivalents. As of June 30, 2024, we had restricted cash of $864 million that is restricted for a specific purpose, with $174 million and $690 million recorded in Restricted cash, current and Restricted cash, non-current, respectively, on our Consolidated Balance Sheet. Allowance for Expected Credit Losses. We recognize expected credit losses resulting from the inability of our customers to make required payments through an allowance account that is measured each reporting date. We estimate credit losses over the life of our trade accounts receivable using a combination of historical loss data, current credit conditions, specific customer circumstances, and reasonable and supportable forecasts of future economic conditions. Inventories. Inventories are valued at the lower of cost or net realizable value, with cost determined on the first-in, first-out basis. Inventory costs include material, labor and manufacturing overhead. In evaluating the net realizable value of inventory, management also considers other factors, including known trends and market conditions. We generally record a reduction to the carrying value of inventory as a charge against earnings for all products on hand more than 12 to 24 months, depending on the nature of the products that have not been sold to customers or cannot be further manufactured for sale to alternative customers. An additional charge may be recorded for product on hand that is in excess of product sold to customers over the same periods noted above. Property, Plant and Equipment. Property, plant and equipment are carried at cost or fair value upon acquisition. Major improvements are capitalized, while maintenance and repairs are generally expensed as incurred. We review our property, plant and equipment and other long-lived assets for impairment whenever events or circumstances indicate that the carrying amounts may not be recoverable. Depreciation on property, plant and equipment and amortization on finance lease right-of-use assets for financial reporting purposes is computed primarily by the straight-line method over the estimated useful lives for building, building improvements and land improvements of 10 to 40 years and 3 to 20 years for machinery and equipment. Leases. Leases are recognized under Accounting Standards Codification 842, Leases. The Company determines whether a contract contains a lease at contract inception. A contract contains a lease if there is an identified asset and the Company has the right to control the asset. Operating lease right-of-use (“ROU”) assets represent our right to use an underlying asset for the lease term, and lease liabilities represent our obligation to make lease payments arising from the lease. Operating lease ROU assets and lease liabilities are recognized at commencement date based on the present value of lease payments over the lease term. We use the incremental borrowing rate in determining the present value of lease payments, unless the implicit rate is readily determinable. If lease terms include options to extend or terminate the lease, the ROU asset and lease liability are measured based on the reasonably certain decision. We have lease agreements with lease and non-lease components, which are accounted for as a single lease component for all classes of leased assets for which the Company is the lessee. Additionally, for certain equipment leases, the portfolio approach is applied to account for the operating lease ROU assets and lease liabilities. In the Consolidated Statements of Earnings (Loss), lease expense for operating lease payments is recognized on a straight-line basis over the lease term. For finance leases, interest expense is recognized on the lease liability and the ROU asset is amortized over the lease term. Some leasing arrangements require variable payments that are dependent upon usage or output, or may vary for other reasons, such as insurance or tax payments. Variable lease payments are recognized as incurred, and are not presented as part of the ROU asset or lease liability. See Note 13. Leases for further information. Business Combinations. The Company accounts for business combinations by establishing the acquisition-date fair value as the measurement for all assets acquired and liabilities assumed. Certain provisions of U.S. GAAP prescribe, among other things, the determination of acquisition-date fair value of consideration paid in a business combination (including contingent consideration) and the exclusion of transaction and acquisition-related restructuring costs from acquisition accounting. On July 1, 2022, we acquired Coherent, Inc. The significant accounting policies of Coherent, Inc. have been aligned to conform to those of the Company, and the consolidated financial statements include the results of Coherent, Inc. as of its acquisition date. See Note 3. Coherent Acquisition for further information. Goodwill. The excess purchase price over the fair value allocated to identifiable tangible and intangible net assets of businesses acquired is reported as goodwill in the accompanying Consolidated Balance Sheets. We test goodwill for impairment at least annually as of April 1, or when events or changes in circumstances indicate that goodwill might be impaired. The evaluation of impairment involves comparing the current fair value of our reporting units to the recorded value (including goodwill). We use a discounted cash flow (“DCF”) model and/or a market analysis to determine the fair value of our reporting units. A number of assumptions and estimates are involved in estimating the forecasted cash flows used in the DCF model, including markets and market shares, sales volume and pricing, costs to produce, working capital changes and income tax rates. Management considers historical experience and all available information at the time the fair values of the reporting units are estimated. Goodwill impairment is measured as the amount by which a reporting unit’s carrying value exceeds its fair value, not to exceed the carrying amount of goodwill. We have the option to perform a qualitative assessment of goodwill prior to completing the quantitative assessment described above to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount, including goodwill and other intangible assets. If we conclude that this is the case, we must perform the quantitative assessment. Otherwise, we will forego the quantitative assessment and do not need to perform any further testing. As of April 1 of fiscal years 2024 and 2023, we completed our annual impairment tests of our reporting units using the quantitative assessment. For fiscal year 2024, the fair values of the reporting units were determined using a discounted cash flow analysis with projected financial information based on our most recently completed long-term strategic planning processes and also considered the current financial performance compared to our prior projections of the reporting units, as well as a market analysis. As of April 1, 2024, the fair value of each of our reporting units exceeded their carrying values. Due to the cyclical nature of our business, and the other factors described in the section on Risk Factors set forth in Item 1A of this Annual Report on Form 10-K, the profitability of our individual reporting units may periodically be affected by downturns in customer demand, operational challenges and other factors. If material adverse conditions occur that impact one or more of our reporting units, our determination of future fair value might not support the carrying amount of one or more of our reporting units, and the related goodwill would need to be impaired. Intangibles. Intangible assets are initially recorded at their cost or fair value upon acquisition. Finite-lived intangible assets are amortized using the straight-line method over the estimated useful lives of the assets ranging from 1 to 20 years. Indefinite-lived intangible assets are not amortized but tested annually for impairment at April 1, or when events or changes in circumstances indicate that indefinite-lived intangible assets might be impaired. As of April 1 of fiscal 2024, the Company completed a quantitative impairment test of the Coherent trade name acquired in the Merger using the relief from royalty method and determined that its fair value is well in excess of its carrying value. Series A Mandatory Convertible Preferred Stock . The Mandatory Convertible Preferred Stock was initially measured at fair value, less underwriting discounts and commissions and offering expenses paid by the Company. The Preferred Stock’s dividends were cumulative, at 6% per annum. All outstanding shares of Mandatory Convertible Preferred Stock were converted to 10,240,290 shares of Company Common Stock on July 3, 2023, at a conversion ratio of 4.4523, and no shares of Mandatory Convertible Preferred Stock are currently issued and outstanding. See Note 10. Equity and Redeemable Preferred Stock for further information. Series B Convertible Preferred Stock. The Series B-1 Convertible Preferred Stock is initially measured at fair value less issuance costs, accreted to its redemption value over a ten-year period (using the effective interest method) with such accretion accounted for as deemed dividends and reductions to Net Earnings (Loss) Available to the Common Shareholders. The Series B-2 Convertible Preferred Stock is initially measured at fair value less issuance costs, accreted to its redemption value over a ten-year period (using the effective interest method) with such accretion accounted for as deemed dividends and reductions to Net Earnings (Loss) Available to the Common Shareholders. See Note 10. Equity and Redeemable Preferred Stock for further information. Noncontrolling Interests. The Company accounts for noncontrolling interests in accordance with ASC Topic 810-10-45, which requires the Company to present noncontrolling interests as a separate component of total shareholders’ equity on the Consolidated Balance Sheets and the consolidated net earnings (loss) attributable to its noncontrolling interests be clearly identified and presented on the face of the Consolidated Statements of Earnings (Loss) and Consolidated Statements of Comprehensive Income (Loss). See Note 12. Noncontrolling Interests for further information on the noncontrolling interests in our Silicon Carbide LLC subsidiary. Commitments and Contingencies. Liabilities for loss contingencies arising from claims, assessments, litigation, fines, and penalties and other sources are recorded when it is probable that a liability has been incurred and the amount of the assessment and/or remediation can be reasonably estimated. Legal costs incurred in connection with loss contingencies are expensed as incurred. Such liabilities are adjusted as further information develops or circumstances change. Our customers may discover defects in our products after the products have been fully deployed and operated under peak stress conditions. If we are unable to correct defects or other problems, we could experience, among other things, loss of customers, increased costs of product returns and warranty expenses, damage to our brand reputation, failure to attract new customers or achieve market acceptance, diversion of development and engineering resources, or legal action by our customers. We had no material loss contingency liabilities at June 30, 2024 or 2023 related to commitments and contingencies. Income Taxes. Deferred income tax assets and liabilities are determined based on the differences between the Consolidated Financial Statements and tax basis of assets and liabilities using enacted tax rates in effect in the years in which the differences are expected to reverse. Valuation allowances are established when necessary to reduce deferred income tax assets to the amount more likely than not to be realized. The Company’s accounting policy is to apply acquired deferred tax liabilities to pre-existing deferred tax assets before evaluating the need for a valuation allowance for acquired deferred tax assets. The Company recognizes the tax benefit from an uncertain tax position only if it is more likely than not that the tax position will be sustained on examination by the taxing authorities, based on the technical merits of the position. The tax benefits recognized in the financial statements from such a position are measured based on the largest benefit that has a greater than 50% likelihood of being realized upon ultimate resolution. The amount of unrecognized tax benefits is adjusted for changes in facts and circumstances. For example, adjustments could result from significant amendments to existing tax law and the issuance of regulations or interpretations by the taxing authorities, new information obtained during a tax examination, or resolution of an examination. The Company believes that its estimates for uncertain tax positions are appropriate and sufficient to pay assessments that may result from examinations of its tax returns. The Company recognizes both accrued interest and penalties related to unrecognized tax benefits in income tax expense. Revenue Recognition. Revenue is recognized under Accounting Standards Codification 606, Revenue from Contracts with Customers (ASC 606), when or as obligations under the terms of a contract with our customer have been satisfied and control has transferred to the customer. We have elected the practical expedient to exclude all taxes from the measurement of the transaction price. For contracts with commercial customers, which comprise the majority of our performance obligations, ownership of the goods and associated revenue are generally transferred to customers at a point in time, generally upon shipment of a product to the customer or delivery of the product to the customer and without significant judgments. The majority of contracts typically require payment within 30 to 90 days after transfer of ownership to the customer. We periodically enter into contracts in which a customer may purchase a combination of goods and/or services, such as products with maintenance contracts or extended warranty. Maintenance contracts and extended warranties are sold separately from products, and represent a distinct performance obligation. Revenue related to the performance obligation for maintenance contracts and extended warranties is recognized over time as the customer simultaneously receives and consumes the benefits provided by us. Service revenue includes repairs, tolling arrangements and installation. Repairs, tolling and installation activities are usually completed in a short period of time (normally less than one month) and therefore recorded at a point in time when the services are completed. The majority of contracts typically require payment within 30 to 90 days after performance of the service. Non-recurring engineering arrangements are typically recognized as product revenue over time under either the time and material practical expedient, as the entity has a right to consideration from a customer, in an amount that corresponds directly with the value to the customer of the entity’s performance completed to date, or under the output and input method. The majority of contracts typically require payment within 30 to 90 days. Our revenue recognition policy is consistently applied across our segments, product lines, services, and geographical locations. For the periods covered herein, we measure revenue based on the amount of consideration it expects to be entitled to in exchange for products or services, reduced by the amount of variable consideration related to products expected to be returned. We determine variable consideration, which primarily consists of product returns and distributor sales price reductions resulting from price protection agreements, by estimating the impact of such reductions based on historical analysis of such activity. Under ASC 606, we expense sales commissions when incurred because the amortization period would have been one year or less. These costs are recorded within selling, general and administrative expenses (“SG&A”). Costs for freight and shipping are generally recorded in cost of goods sold when control over products has transferred to the customer. We offer an assurance-type limited warranty that products will be free from defects in materials and workmanship. We establish an accrual for estimated warranty expenses at the time revenue is recognized. The warranty is typically one year, although can be longer periods for certain products, and is typically limited to either (1) the replacement or repair of the product or (2) a credit against future purchases. We believe that disaggregating revenue by end market provides the most relevant information regarding the nature, amount, timing, and uncertainty of revenues and cash flows. See Note 4. Revenue from Contracts with Customers for further information. Internal Research and Development . Internal research and development (“IR&D”) expenses include salaries, contractor and consultant fees, supplies and materials, as well as costs related to other overhead such as depreciation, facilities, utilities and other departmental expenses. The costs we incur with respect to internally developed technology, including allocations of our wafer fabrication and other manufacturing facilities and resources utilized to support R&D programs, are included in IR&D expenses as incurred. Share-Based Compensation. Share-based compensation arrangements require the recognition in net earnings (loss) of the grant date fair value of share-based compensation (for equity-classified awards). We recognize the share-based compensation expense over the requisite service period of the individual grantees, which generally equals the vesting period, net of forfeitures. The estimated annualized forfeitures are based on our historical experience of pre-vesting cancellations. We will record additional expense in future periods if the actual forfeiture rate is lower than estimated, and will adjust expense in future periods if the actual forfeitures are higher than estimated. See Note 14. Share-Based Compensation for a description of our share-based compensation plans and the assumptions we use to calculate the fair value of share-based compensation. Earnings per Share. Basic earnings (loss) per share is computed by dividing net earnings (loss) available to the common shareholders by the weighted-average number of shares of common stock outstanding during the period. Diluted earnings (loss) per share is computed by dividing the diluted earnings (loss) available to the common shareholders by the weighted-average number of shares of common stock and potentially dilutive shares of common stock outstanding during the period. If there is a net loss for the period, diluted earnings per share is the same as basic earnings per share. See Note 11. Earnings Per Share for further information. Accumulated Other Comprehensive Income (Loss). Accumulated other comprehensive income (loss) is a measure of all changes in shareholders’ equity that result from transactions and other economic events in the period other than transactions with owners. Accumulated other comprehensive income (loss) is a component of shareholders’ equity and consists of accumulated foreign currency translation adjustments, changes in the fair value of interest rate swap and cap derivative instruments, and pension adjustments. Fair Value Measurements. We apply fair value accounting for all financial assets and liabilities that are required to be recognized or disclosed at fair value in the Consolidated Financial Statements. Fair value is defined as the price that would be received from selling an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. When determining the fair value measurements for assets and liabilities, we consider the principal or most advantageous market in which we would transact, and the market-based risk measurements or assumptions that market participants would use in pricing the asset or liability, such as inherent risk, transfer restrictions and credit risk.

Recently Issued and Adopted Fin

Recently Issued and Adopted Financial Accounting Standards	12 Months Ended
Recently Issued and Adopted Financial Accounting Standards	Jun. 30, 2024
Accounting Policies [Abstract]
Recently Issued and Adopted Financial Accounting Standards	Recently Issued and Adopted Financial Accounting Standards SEC Final Rule: Cybersecurity Risk Management, Strategy, Governance, and Incident Disclosure In July 2023, the U.S. Securities and Exchange Commission (the “SEC”) adopted the final rule under SEC Release No. 33-11216, Cybersecurity Risk Management, Strategy, Governance, and Incident Disclosure, requiring current reporting about material cybersecurity incidents and annual disclosures on management’s processes for assessing, identifying, and managing material cybersecurity risks, the material impacts of cybersecurity threats and previous cybersecurity incidents, the Board of Directors’ (the “Board”) oversight of cybersecurity risks, and management’s role and expertise in assessing and managing material cybersecurity risks. SEC Release No. 33-11216 did not have a material impact on the Company’s consolidated financial statements and disclosures. Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures In November 2023, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2023-07 - Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures. This ASU improves reportable segment disclosure requirements, primarily through enhanced disclosures about significant segment expenses. This ASU is effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024. Early adoption is permitted. The Company is evaluating the impact this will have on the Company’s consolidated financial statements and disclosures. Income Taxes (Topic 740): Improvements to Income Tax Disclosures In December 2023, the FASB issued ASU 2023-09, “Income Taxes (Topic 740): Improvements to Income Tax Disclosures” (“ASU 2023-09”). ASU 2023-09 includes amendments that further enhance income tax disclosures, primarily through standardization and disaggregation of rate reconciliation categories and income taxes paid by jurisdiction. ASU 2023-09 is effective for annual periods beginning after December 15, 2024, on either a prospective or retrospective basis. Early adoption is permitted. The Company is currently evaluating the impact of ASU 2023-09 on its consolidated financial statements and related disclosures. SEC Final Rule: The Enhancement and Standardization of Climate-Related Disclosures for Investors In March 2024, the SEC issued the final rule under SEC Release No. 33-11275 and 34-99678, “The Enhancement and Standardization of Climate-Related Disclosures for Investors,” requiring public companies to provide certain climate-related information in their registration statements and annual reports. The final rules will require information about a company’s climate-related risks that have materially impacted or are reasonably likely to have a material impact on its business strategy, results of operations, or financial condition, and the actual and potential material impacts of any identified climate-related risks on the company’s strategy, business model and outlook, as well as relating to assessment, management, oversight and mitigation of such material risks, material climate-related targets and goals, and material greenhouse gas emissions. Additionally, certain disclosures related to severe weather events and other natural conditions will be required in the audited financial statements. The first phase of the final rule is effective for fiscal years beginning in 2025. Disclosure for prior periods is only required if it was previously disclosed in an SEC filing. On April 4, 2024, the SEC voluntarily stayed implementation of the final rule to facilitate the orderly judicial resolution of pending legal challenges to the rule. We are currently evaluating the impact on our disclosures of adopting this new pronouncement. Supplier Finance Program Obligations (Subtopic 405-50): Disclosure of Supplier Financing Program Obligations In September 2022, the FASB issued ASU No. 2022-04, requiring enhanced disclosures related to supplier financing programs. The ASU requires disclosure of the key terms of the program and a rollforward of the related obligation during the annual period, including the amount of obligations confirmed and obligations subsequently paid. The Company adopted this ASU as of July 1, 2023, other than the roll-forward disclosure requirement, which the Company will adopt in fiscal 2025. The adoption did not have a material impact on the Company's financial statements and related disclosures.

Coherent Acquisition

Coherent Acquisition	12 Months Ended
Coherent Acquisition	Jun. 30, 2024
Business Combination, Asset Acquisition, and Joint Venture Formation [Abstract]
Coherent Acquisition	Coherent Acquisition On July 1, 2022 (the “Closing Date”), the Company completed its acquisition of Coherent, Inc. (the “Merger”), a global provider of lasers and laser-based technology for scientific, commercial, and industrial customers, in a combined cash and stock transaction in accordance with the Agreement and Plan of Merger dated March 25, 2021 (the “Merger Agreement”). Pursuant to the terms of the Merger Agreement, and subject to the conditions set forth therein, each share of common stock of Coherent, Inc., par value $0.01 per share (the “Coherent, Inc. Common Stock”), issued and outstanding immediately prior to July 1, 2022, was canceled and extinguished and automatically converted into the right to receive $220.00 in cash and 0.91 of a share of Coherent’s common stock, no par value (“Coherent Common Stock”). Following the completion of the Coherent, Inc. acquisition, the Company announced a new brand identity, including a corporate name change to Coherent Corp. (NYSE: COHR) on September 8, 2022. On the Closing Date, the Company entered into a Credit Agreement (the “Credit Agreement”) by and among the Company, the lenders, and other parties thereto, and JP Morgan Chase Bank, N.A., as administrative agent and collateral agent, which provides for senior secured financing of $4 billion, consisting of a new term loan A credit facility (the “Term A Facility”) in an aggregate principal amount of $850 million a new term loan B credit facility (the “Term B Facility”) (and, together with the Term A Facility, the “Term Facilities”) in an aggregate principal amount of $3 billion, and a new revolving credit facility (the “Revolving Credit Facility”) in an aggregate available amount of $350 million, including a letter of credit sub-facility of up to $50 million. For further information on the credit facility refer to Note 8. Debt. In order to complete the funding of the Merger, we had a net cash outflow of $2.1 billion on July 1, 2022. We recorded $94 million of acquisition related costs in the year ended June 30, 2023 representing professional and other direct acquisition costs. These costs are recorded within SG&A expense in our Consolidated Statement of Earnings (Loss). Approximately 23 million shares of Coherent Common Stock in the aggregate were issued in conjunction with the closing of the Merger. Total Merger consideration was $7.1 billion, including replacement equity awards attributable to pre-combination service for certain Coherent, Inc. restricted stock units. The total fair value of consideration paid in connection with the acquisition of Coherent, Inc. consisted of the following (in $000): Shares Per Share Total Consideration Cash paid for merger consideration — — $ 5,460,808 Shares of COHR common stock issued to Coherent, Inc. stockholders 22,587,885 $49.83 1,125,554 Converted Coherent, Inc. RSUs attributable to pre-combination service — — 82,037 Payment of Coherent, Inc. debt — — 364,544 Payment of Coherent, Inc. transaction expenses — — 62,840 $ 7,095,783 The purchase price allocation set forth herein is final. We allocated the fair value of the purchase price consideration to the tangible assets, liabilities, and intangible assets acquired, generally based on estimated fair values. The excess purchase price over those fair values is recorded as goodwill. Our valuation assumptions of acquired assets and assumed liabilities require estimates, especially with respect to intangible assets, inventories, property, plant & equipment and deferred income taxes. In determining the fair value of intangible assets acquired, we must make assumptions about the future performance of the acquired business, including among other things, the forecasted revenue growth attributable to the asset group and projected operating expenses inclusive of expected synergies, future cost savings, and other benefits expected to be achieved by combining the Company and Coherent, Inc. Our intangible assets are comprised of trade names and trademarks, customer relationships, developed technology and backlog. We utilized widely accepted income-based, market-based, and cost-based valuation approaches to perform the purchase price allocation. The estimated fair value of the customer relationships and backlog are determined using the multi-period excess earnings method and the estimated fair value of the trade names and trademarks and developed technology are determined using the relief from royalty method. Both methods require forward looking estimates that are discounted to determine the fair value of the intangible asset using a risk-adjusted discount rate that is reflective of the level of risk associated with future estimates associated with the asset group that could be affected by future economic and market conditions. Our final allocation of the purchase price of Coherent, Inc., based on the estimated fair value of the assets acquired and liabilities assumed as of the Closing Date, is as follows (in $000): Final Purchase Price Allocation, As Adjusted Assets Current Assets Cash, cash equivalents, and restricted cash $ 393,324 Accounts receivable 270,928 Inventories (i) 562,884 Prepaid and refundable income taxes 4,832 Prepaid and other current assets 37,805 Total Current Assets 1,269,773 Property, plant & equipment, net (ii) 440,932 Deferred income taxes 236 Other assets 106,388 Other intangible assets, net (iii) 3,505,000 Goodwill 3,174,984 Total Assets $ 8,497,313 Liabilities Current Liabilities Current portion of long-term debt $ 4,504 Accounts payable 116,754 Accrued compensation and benefits 58,631 Operating lease current liabilities 13,002 Accrued income taxes payable 25,052 Other accrued liabilities 138,924 Total Current Liabilities 356,867 Long-term debt 22,991 Deferred income taxes 877,598 Operating lease liabilities 43,313 Other liabilities 100,761 Total Liabilities $ 1,401,530 Final aggregate acquisition consideration $ 7,095,783 (i) The Consolidated Balance Sheet has been adjusted to record Coherent Inc.’s inventories at a fair value of approximately $563 million. The Consolidated Statement of Earnings (Loss) for the year ended June 30, 2023 includes cost of goods sold of approximately $158 million related to the increased basis in the fair value compared to the carrying value. The costs were amortized over the expected period during which the acquired inventory was sold and thus did not affect the Consolidated Statements of Earnings (Loss) beyond twelve months after the Closing Date. (ii) The Consolidated Balance Sheet has been adjusted to record Coherent Inc.’s property, plant and equipment (consisting of land, buildings and improvements, equipment, furniture and fixtures, and leasehold improvements) at a fair value of approximately $441 million. The Consolidated Statements of Earnings (Loss) have been adjusted to recognize additional depreciation expense related to the increased basis. The additional depreciation expense is computed with the assumption that the various categories of assets will be depreciated over their remaining useful lives on a straight-line basis. (iii) Identifiable intangible assets consist of the following and are being amortized over their estimated useful lives in the Consolidated Statements of Earnings (Loss) (in $000): Fair Value Estimated Useful Life Trade names and trademarks $ 430,000 N/A Customer relationships $ 1,830,000 15.0 years Developed technology $ 1,157,500 13.5 years Backlog $ 87,500 1.0 year Intangible assets acquired $ 3,505,000 Operating results, including goodwill and intangibles, of Coherent, Inc. are reflected in the Company’s consolidated financial statements from the Closing Date, within the Lasers segment. Revenues and net loss for the Lasers segment for the year ended June 30, 2023 were $1,469 million and $412 million, respectively. Goodwill in the amount of $3.2 billion arising from the acquisition is attributed to the expected synergies, including future cost savings, and other benefits expected to be generated by combining Coherent and Coherent, Inc. Substantially all of the goodwill recognized is not expected to be deductible for tax purposes. Supplemental Pro Forma Information The supplemental pro forma financial information presented below is for illustrative purposes only and is not necessarily indicative of the financial position or results of operations that would have been realized if the acquisition had been completed on the date indicated, does not reflect synergies that might have been achieved, nor is it indicative of future operating results or financial position. The pro forma adjustments are based upon currently available information and certain assumptions that we believe are reasonable under the circumstances. The following supplemental pro forma information presents the combined results of operations for the years ended June 30, 2023 and June 30, 2022, as if Coherent, Inc. had been acquired as of July 1, 2021. The supplemental pro forma information includes adjustments to amortization and depreciation for acquired intangible assets, property, plant and equipment, adjustments to share-based compensation expense, fair value adjustments on the inventories acquired, transaction costs, interest expense and amortization of debt issuance costs related to the Senior Credit Facilities (as defined in Note 8. Debt). The unaudited supplemental pro forma financial information for the periods presented is as follows (in $000): Year Ended June 30, 2023 Year Ended June 30, 2022 Revenue $ 5,160,100 $ 4,837,103 Net Earnings (Loss) 105,849 (289,615)

Revenue from Contracts with Cus

Revenue from Contracts with Customers	12 Months Ended
Revenue from Contracts with Customers	Jun. 30, 2024
Revenue from Contract with Customer [Abstract]
Revenue from Contracts with Customers	Revenue from Contracts with Customers The following table summarizes disaggregated revenue by market ($000): Year Ended June 30, 2024 Networking Materials Lasers Total Industrial $ 63,905 $ 546,003 $ 1,070,268 $ 1,680,176 Communications 2,192,286 81,475 — 2,273,761 Electronics 6,655 349,250 — 355,905 Instrumentation 32,883 39,845 325,118 397,846 Total Revenues $ 2,295,729 $ 1,016,573 $ 1,395,386 $ 4,707,688 Year Ended June 30, 2023 Networking Materials Lasers Total Industrial $ 70,076 $ 603,664 $ 1,087,881 $ 1,761,621 Communications 2,219,677 73,703 — 2,293,380 Electronics 11,488 614,151 — 625,639 Instrumentation 39,689 58,240 381,531 479,460 Total Revenues $ 2,340,930 $ 1,349,758 $ 1,469,412 $ 5,160,100 Year Ended June 30, 2022 Networking Materials Lasers Total Industrial $ 84,032 $ 662,731 $ — $ 746,763 Communications 2,064,424 90,406 — 2,154,830 Electronics 12,218 298,156 — 310,374 Instrumentation 36,575 68,074 — 104,649 Total Revenues $ 2,197,249 $ 1,119,367 $ — $ 3,316,616 Contract Liabilities

Inventories

Inventories	12 Months Ended
Inventories	Jun. 30, 2024
Inventory Disclosure [Abstract]
Inventories	Inventories The components of inventories were as follows ($000): June 30, 2024 2023 Raw materials $ 429,888 $ 462,436 Work in progress 620,575 549,992 Finished goods 235,941 259,905 Total Inventories $ 1,286,404 $ 1,272,333

Property, Plant & Equipment

Property, Plant & Equipment	12 Months Ended
Property, Plant & Equipment	Jun. 30, 2024
Property, Plant and Equipment [Abstract]
Property, Plant & Equipment	Property, Plant & Equipment Property, plant & equipment consists of the following ($000): June 30, 2024 2023 Land and land improvements $ 66,156 $ 69,639 Buildings and improvements 774,991 780,204 Machinery and equipment 2,034,310 1,879,136 Construction in progress 398,884 287,990 Finance lease right-of-use asset 25,000 25,000 3,299,341 3,041,969 Less accumulated depreciation (1,482,082) (1,259,934) Property, plant, and equipment, net $ 1,817,259 $ 1,782,035 Included in the table above is a building acquired under a finance lease. As of June 30, 2024 and June 30, 2023, the accumulated depreciation of the finance lease ROU asset was $12 million and $11 million, respectively.

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	12 Months Ended
Goodwill and Other Intangible Assets	Jun. 30, 2024
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets Changes in the carrying amount of goodwill were as follows ($000): Year Ended June 30, 2024 Networking Materials Lasers Total Balance at beginning of period $ 1,036,204 $ 247,695 $ 3,228,801 $ 4,512,700 Foreign currency translation and other 388 (1,712) (47,047) (48,371) Balance-end of period $ 1,036,592 $ 245,983 $ 3,181,754 $ 4,464,329 Year Ended June 30, 2023 Networking Materials Lasers Total Balance-beginning of period $ 1,013,277 $ 272,482 $ — $ 1,285,759 Goodwill acquired — — 3,174,984 3,174,984 Foreign currency translation and other 22,927 (24,787) 53,817 51,957 Balance-end of period $ 1,036,204 $ 247,695 $ 3,228,801 $ 4,512,700 The gross carrying amount and accumulated amortization of our intangible assets other than goodwill as of June 30, 2024 and 2023 were as follows ($000): June 30, 2024 June 30, 2023 Gross Accumulated Net Gross Accumulated Net Technology $ 1,653,289 $ (394,040) $ 1,259,249 $ 1,661,263 $ (270,786) $ 1,390,477 Trade Names 438,470 (8,470) 430,000 438,470 (8,279) 430,191 Customer Lists 2,310,550 (498,252) 1,812,298 2,333,360 (339,344) 1,994,016 Backlog and Other 88,792 (87,092) 1,700 88,834 (88,834) — Total $ 4,491,101 $ (987,854) $ 3,503,247 $ 4,521,927 $ (707,243) $ 3,814,684 Amortization expense recorded on the intangible assets for the fiscal years ended June 30, 2024, 2023 and 2022 was $288 million, $414 million, and $80 million, respectively. The technology intangible assets are being amortized over a range of 60 to 240 months with a weighted-average remaining life of approximately 155 months, and the amortization is recorded in Cost of goods sold in our Consolidated Statements of Earnings (Loss). The customer lists are being amortized over 72 to 192 months with a weighted-average remaining life of approximately 148 months, and the amortization is recorded in SG&A in our Consolidated Statements of Earnings (Loss). Amortization expense Cost of goods sold SG&A In the fourth quarter of fiscal year 2024, we completed our impairment test of our $430 million indefinite-lived Coherent trade name acquired in the Merger, concluding it was not impaired. The estimated amortization expense for existing intangible assets for each of the five succeeding years is as follows ($000): Year Ending June 30, 2025 $ 270,150 2026 269,041 2027 267,928 2028 266,238 2029 260,394

Debt

Debt	12 Months Ended
Debt	Jun. 30, 2024
Debt Disclosure [Abstract]
Debt	Debt The components of debt were as follows ($000): June 30, 2024 June 30, 2023 Term A Facility, interest at adjusted SOFR, as defined, plus 2.000% $ 775,625 $ 818,125 Revolving New Credit Facility, interest at LIBOR, as defined, plus 2.000% — — Debt issuance costs, Term A Facility and Revolving Credit Facility (13,586) (18,149) Term B Facility, interest at adjusted SOFR, as defined, plus 2.50% 2,384,536 2,566,625 Debt issuance costs, Term B Facility (49,835) (63,977) 5.00% Senior Notes 990,000 990,000 Debt Issuance costs, Senior Notes (5,939) (6,863) 1.3% Term loan 335 1,697 Facility construction loan in Germany 19,082 22,340 Total debt 4,100,218 4,309,798 Current portion of long-term debt (73,770) (74,836) Long-term debt, less current portion $ 4,026,448 $ 4,234,962 The required annual principal repayments for all indebtedness for the next five years and thereafter, as of June 30, 2024, is set forth in the following table ($000): Year Ending June 30, 2025 $ 70,126 2026 85,730 2027 91,042 2028 638,230 2029 27,292 Thereafter 3,257,157 Total $ 4,169,577 Senior Credit Facilities On July 1, 2022, Coherent entered into a Credit Agreement by and among the Company, as borrower (in such capacity, the “Borrower”), the lenders, and other parties thereto, and JP Morgan Chase Bank, N.A., as administrative agent and collateral agent, which provides for senior secured financing of $4.0 billion, consisting of a term loan A credit facility (the “Term A Facility”), with an aggregate principal amount of $850 million, a term loan B credit facility (the “Term B Facility” and, together with the Term A Facility, the “Term Facilities”), with an aggregate principal amount of $2,800 million, and a revolving credit facility (the “Revolving Credit Facility”), in an aggregate available amount of $350 million, including a letter of credit sub-facility of up to $50 million. On March 31, 2023, Coherent entered into Amendment No. 1 to the Credit Agreement, which replaced the adjusted LIBOR-based rate of interest therein with an adjusted SOFR-based rate of interest. As amended, the Term A Facility and the Revolving Credit Facility each bear interest at an adjusted SOFR rate subject to a 0.10% floor plus a range of 1.75% to 2.50%, based on the Company’s total net leverage ratio. The New Term A Facility and the New Revolving Credit Facility bear interest at adjusted SOFR plus 2.00% as of June 30, 2024. On April 2, 2024, Coherent entered into Amendment No. 2 to the Credit Agreement, under which the principal amount of term B loans outstanding under the Credit Agreement (the “Existing Term B Loans”) were replaced with an equal amount of new term loans (the “New Term B Loans”) having substantially similar terms as the Existing Term B Loans, except with respect to the interest rate applicable to the New Term B Loans and certain other provisions. As further amended, the New Term B Loans bear interest at a SOFR rate (subject to a 0.50% floor) plus 2.50% as of June 30, 2024. The maturity of the New Term Loans and revolving credit facility remains unchanged. Debt extinguishment costs related to the replacement of the Existing Term B Loans of $2 million were expensed in Other expense (income), net in the Consolidated Statement of Earnings (Loss) during the year ended June 30, 2024. In relation to the Term Facilities, the Company incurred interest expense, including amortization of debt issuance costs and the benefit of the interest rate cap and swap, of $237 million and $239 million in the years ended June 30, 2024 and June 30, 2023, respectively, which is included in Interest expense in the Consolidated Statements of Earnings (Loss). On July 1, 2023, our interest rate cap became effective, which together with our interest rate swap, reduced interest expense by $45 million and $20 million in the years ended June 30, 2024 and June 30, 2023, respectively. Amortization of debt issuance costs related to the Term Facilities for the year ended June 30, 2024 and June 30, 2023 totaled $15 million and $18 million, respectively, and are included in Interest expense in the Consolidated Statements of Earnings (Loss). Debt issuance costs are presented as a reduction to debt within the Long-term debt caption in the Consolidated Balance Sheets. On the Closing Date, the Borrower and certain of its direct and indirect subsidiaries, provided a guaranty of all obligations of the Borrower and the other loan parties under the Credit Agreement and the other loan documents, secured cash management agreements and secured hedge agreements with the lenders and/or their affiliates (subject to certain exceptions). The Borrower and the other guarantors have also granted a security interest in substantially of their assets to secure such obligations. Proceeds of the loans borrowed under the Term Facilities on July 1, 2022, together with other financing sources (including the net proceeds from Coherent’s offer and sale of its 5.000% Senior Notes due 2029 (the “Senior Notes”) and cash on hand) were used to fund the cash portion of the Merger consideration, the repayment of certain indebtedness (including the repayment in full of all amounts outstanding under the Prior Credit Agreement as defined below), and certain fees and expenses in connection with the Merger and otherwise for general corporate purposes. As of June 30, 2024, the Company was in compliance with all covenants under the Term Facilities. Prior Senior Credit Facilities Through June 30, 2022, the Company had senior credit facilities (the “Prior Credit Agreement”) with Bank of America, N.A., as Administrative Agent, Swing Line Lender and an L/C Issuer, and the other lenders party thereto. On July 1, 2022, the Company terminated the Prior Credit Agreement and repaid all amounts outstanding thereunder. Debt extinguishment costs related to the termination of the Prior Credit Agreement of $17 million were expensed in Other expense (income), net in the Consolidated Statement of Earnings (Loss) during the year ended June 30, 2023. Bridge Loan Commitment Subject to the terms of an amended and restated commitment letter entered into in connection with Coherent entering into the Merger Agreement, the commitment parties thereto committed to provide, in addition to the Term Facilities and the Revolving Credit Facility, a senior unsecured bridge loan facility in an aggregate principal amount of $990 million (the “Bridge Loan Commitment”). As a result of the issuance of the Senior Notes, the Bridge Loan Commitment was terminated. During the year ended June 30, 2023, we incurred expenses of $18 million related to the Bridge Loan Commitment, which is included in Other expense (income) in the Consolidated Statements of Earnings (Loss). During the year ended June 30, 2022, we incurred expenses of $3 million related to the Bridge Loan Commitment, which is included in Interest expense in the Consolidated Statements of Earnings (Loss). Debt Assumed through Acquisition We assumed the remaining balances of three term loans with the closing of the Merger. The aggregate principal amount outstanding is $19 million as of June 30, 2024. The terms loans assumed consisted of the following: (i) 1.3% Term Loan due 2024, (ii) 1.0% State of Connecticut Term Loan due 2023 (and repaid prior to June 30, 2023), and (iii) Facility construction loan in Germany due 2030. For the Facility construction loan, on December 21, 2020, Coherent LaserSystems GmbH & Co. KG entered into a loan agreement with Commerzbank for borrowings of up to 24 million Euros, which were drawn down by October 29, 2021, to finance a portion of the construction of a new facility in Germany. The term of the loan is 10 years, and borrowings bear interest at 1.55% per annum. Payments are made quarterly. 5.000% Senior Notes due 2029 On December 10, 2021, the Company issued $990 million aggregate principal amount of Senior Notes pursuant to the indenture, dated as of December 10, 2021 (the “Indenture”), between the Company and U.S. Bank National Association, as trustee. The Senior Notes are guaranteed by each of the Company’s domestic subsidiaries that guarantee its obligations under the Senior Credit Facilities. Interest on the Senior Notes is payable on December 15 and June 15 of each year, commencing on June 15, 2022, at a rate of 5.000% per annum. The Senior Notes will mature on December 15, 2029 . On or after December 15, 2024, the Company may redeem the Senior Notes, in whole at any time or in part from time to time, at the redemption prices set forth in the Indenture, plus accrued and unpaid interest, if any, to, but excluding, the applicable redemption date. In addition, at any time prior to December 15, 2024, the Company may redeem the Senior Notes, at its option, in whole at any time or in part from time to time, at a redemption price equal to 100% of the principal amount of the Senior Notes redeemed, plus a “make-whole” premium set forth in the Indenture, plus accrued and unpaid interest, if any, to, but excluding, the applicable redemption date. Notwithstanding the foregoing, at any time and from time to time prior to December 15, 2024, the Company may redeem up to 40% of the aggregate principal amount of the Senior Notes using the proceeds of certain equity offerings as set forth in the Indenture, at a redemption price equal to 105.000% of the principal amount thereof, plus accrued and unpaid interest, if any, to, but excluding, the applicable redemption date. In relation to the Senior Notes, we incurred interest expense of $50 million for both the years ended June 30, 2024 and June 30, 2023, which is included in Interest expense in the Consolidated Statements of Earnings (Loss). The Indenture contains customary covenants and events of default, including default relating to among other things, payment default, failure to comply with covenants or agreements contained in the Indenture or the Senior Notes and certain provisions related to bankruptcy events. As of June 30, 2024, the Company was in compliance with all covenants under the Indenture. Aggregate Availability The Company had aggregate availability of $346 million under its Revolving Credit Facility as of June 30, 2024. Weighted Average Interest Rate

Income Taxes

Income Taxes	12 Months Ended
Income Taxes	Jun. 30, 2024
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The components of earnings (loss) before income taxes by jurisdiction were as follows ($000): Year Ended June 30, 2024 2023 2022 U.S. loss $ (540,048) $ (450,370) $ (62,721) Non-U.S. income 392,401 94,812 344,528 Earnings (loss) before income taxes $ (147,647) $ (355,558) $ 281,807 The components of the income tax expense (benefit) were as follows ($000): Year Ended June 30, 2024 2023 2022 Current: Federal $ 10,119 $ 5 $ 1,569 State 181 3,867 768 Foreign 103,640 106,850 52,865 Total Current 113,940 110,722 55,202 Deferred: Federal (68,955) (106,044) (7,185) State (186) (7,151) (1,215) Foreign (33,682) (93,627) 246 Total Deferred (102,823) (206,822) (8,154) Total Income Tax Expense (Benefit) $ 11,117 $ (96,100) $ 47,048 Principal items comprising deferred tax assets and liabilities were as follows ($000): June 30, 2024 2023 Deferred income tax assets Inventory capitalization $ 62,242 $ 60,232 Non-deductible accruals 16,770 18,423 Accrued employee benefits 38,460 40,292 Net-operating loss and credit carryforwards 268,735 234,546 Share-based compensation expense 15,947 16,729 Other 1,346 9,256 Research and development capitalization 128,291 85,473 Deferred revenue 14,839 11,415 Right of use asset 47,712 42,688 Valuation allowances (154,830) (97,180) Total deferred income tax assets 439,512 421,874 Deferred income tax liabilities Tax over book accumulated depreciation (29,065) (56,742) Intangible assets (905,435) (988,580) Interest rate swap (4,104) (8,522) Interest rate cap (11,465) (10,734) Tax on unremitted earnings (61,719) (51,672) Outside basis differences (122,423) — Lease liability (46,198) (41,426) Other (2,511) (6,757) Total deferred income tax liabilities (1,182,920) (1,164,433) Net deferred income taxes $ (743,408) $ (742,559) The reconciliation of income tax expense at the statutory U.S. federal rate to the reported income tax expense (benefit) is as follows ($000): Year Ended June 30, 2024 % 2023 % 2022 % Taxes at statutory rate $ (31,006) 21 $ (74,667) 21 $ 59,179 21 Increase (decrease) in taxes resulting from: State income taxes-net of federal benefit (22) — (2,548) 1 (339) — Taxes on non U.S. earnings 16,601 (11) 191 — (2,704) (1) Valuation allowance 43,866 (30) 3,836 (1) (1,513) (1) U.S. Branch Income 3,226 (2) 2,037 (1) 1,230 1 Noncontrolling interest 1,002 (1) — — — — Research and manufacturing incentive deductions and credits (41,387) 28 (29,416) 8 (24,341) (9) Stock compensation 13,294 (9) 18,661 (5) 2,095 1 GILTI and FDII (629) — (7,195) 2 4,866 2 Other 6,172 (4) (6,999) 2 8,575 3 $ 11,117 (8) $ (96,100) 27 $ 47,048 17 The Company is partially permanently reinvested and will repatriate earnings for all non-U.S. subsidiaries with cash in excess of working capital needs. Such distributions could potentially be subject to U.S. state tax in certain states and foreign withholding taxes. Foreign currency gains (losses) related to the translation of previously taxed earnings from functional currency to U.S. dollars could also be subject to U.S. tax when distributed. The Company has estimated the associated withholding tax to be $62 million. Additionally, the Company made a final accounting policy election to treat taxes due from future inclusions in U.S. taxable income related to global intangible low tax income (“GILTI”) as a current period expense when incurred. During the fiscal years ended June 30, 2024, 2023, and 2022, cash paid by the Company for income taxes was $97 million, $90 million, and $50 million, respectively. Our foreign subsidiaries in various tax jurisdictions operate under tax holiday arrangements. The impact of the tax holidays on our effective rate is a reduction in the rate of 5.6%, 2.3% and 1.6% for the fiscal years ended June 30, 2024, 2023 and 2022, respectively, and the impact of the tax holidays on diluted earnings per share is $0.05, $0.05, and $0.04 for the fiscal years ended June 30, 2024, 2023, and 2022, respectively. The tax holiday related to Coherent Malaysia Sdn. Bhd will end during the fiscal year ended June 30, 2026 for certain business lines, the tax holiday related to certain II-VI Laser Enterprise Philippines, Inc.’s business lines will end during the fiscal year ended June 30, 2026, the tax holiday related to certain II-VI Vietnam Co., Ltd business lines will end during the fiscal year ended June 30, 2024, and the tax holiday related to certain Coherent Singapore PTE Ltd business lines will end during the fiscal year ended June 30, 2027. The Company has the following gross operating loss carryforwards and tax credit carryforwards as of June 30, 2024 ($000): Type Amount Expiration Date Tax credit carryforwards: Federal research and development credits $ 138,723 June 2029-June 2044 Foreign tax credits — State tax credits 21,420 June 2025-June 2039 State tax credits (indefinite) 79,179 Indefinite Operating loss carryforwards: Loss carryforwards - federal $ 36,014 June 2025-June 2036 Loss carryforwards - federal (indefinite) 1,968 Indefinite Loss carryforwards - state 324,702 June 2025-June 2044 Loss carryforwards - state (indefinite) 36,719 Indefinite Loss carryforwards - foreign 70,666 June 2025-June 2033 Loss carryforwards - foreign (indefinite) 152,336 Indefinite The Company has recorded a valuation allowance against the majority of the foreign and state loss and credit carryforwards, certain U.S. credit carryforwards and the majority of state credit carryfowards. The Company’s U.S. federal loss carryforwards, federal research and development credit carryforwards, foreign tax credits, and certain state tax credits resulting from the Company’s acquisitions are subject to various annual limitations under Section 382 of the U.S. Internal Revenue Code. Changes in the liability for unrecognized tax benefits for the fiscal years ended June 30, 2024, 2023 and 2022 were as follows ($000): Year Ended June 30, 2024 2023 2022 Beginning balance $ 115,180 $ 37,411 $ 38,025 Increases in current year tax positions 5,168 110 1,803 Acquired business — 86,077 — Settlements (2,970) — — Expiration of statute of limitations (681) (8,418) (2,417) Ending balance $ 116,697 $ 115,180 $ 37,411 The Company classifies all estimated and actual interest and penalties as income tax expense. During fiscal years 2024, 2023 and 2022, there was $2.3 million, $0.3 million and $0.4 million of interest and penalties within income tax expense, respectively. The Company had $7 million, $6 million and $3 million of interest and penalties accrued at June 30, 2024, 2023 and 2022, respectively. The Company has classified the uncertain tax positions as non-current income tax liabilities, as the amounts are not expected to be paid within one year. The majority of the liability can be offset by credit carryforwards and would not impact cash taxes. Including tax positions for which the Company determined that the tax position would not meet the more likely than not recognition threshold upon examination by the tax authorities based upon the technical merits of the position, the total estimated unrecognized tax benefit that, if recognized, would affect our effective tax rate, was approximately $19 million, $92 million and $25 million at June 30, 2024, 2023 and 2022, respectively. For the year ended June 30, 2024, due to the U.S. valuation allowance, a large portion of our unrecognized tax benefit will no longer impact the tax rate if recognized. The Company expects a decrease of $2 million of unrecognized tax benefits during the next 12 months due to the expiration of statutes of limitation. Fiscal years 2018 and 2020 to 2023 remain open to examination by the Internal Revenue Service, fiscal years 2019 to 2023 remain open to examination by certain state jurisdictions, and fiscal years 2012 to 2023 remain open to examination by certain foreign taxing jurisdictions. The Company is currently under examination for certain subsidiary companies in Vietnam for the years ended June 30, 2017 through September 30, 2021; Singapore for the year ended September 30, 2020; Korea for the year ended September 30, 2021; Spain for the years ended September 30, 2020 through September 30, 2022; and Germany for the years ended June 30, 2012 through September 30, 2020. The Company believes its income tax reserves for these tax matters are adequate.

Equity and Redeemable Preferred

Equity and Redeemable Preferred Stock	12 Months Ended
Equity and Redeemable Preferred Stock	Jun. 30, 2024
Equity [Abstract]
Equity and Redeemable Preferred Stock	Equity and Redeemable Preferred Stock As of June 30, 2024, the Company’s amended and restated articles of incorporation authorize our board of directors, without the approval of our shareholders, to issue 5 million shares of our preferred stock. As of June 30, 2024, 2.3 million shares of mandatory preferred convertible shares have been authorized, none are outstanding; 75,000 shares of Series B-1 convertible preferred stock, no par value, have been issued and are outstanding; and 140,000 shares of Series B-2 convertible preferred stock, no par value, have been issued and are outstanding. Mandatory Convertible Preferred Stock In July 2020, we issued 2.3 million shares of Mandatory Convertible Preferred Stock. All outstanding shares of Mandatory Convertible Preferred Stock were converted to 10,240,290 shares of Company Common Stock on July 3, 2023, at a conversion ratio of 4.4523, and no shares of Mandatory Convertible Preferred Stock are currently issued and outstanding. Preferred dividends are presented as a reduction to Retained earnings on the Consolidated Balance Sheets. The following table presents dividends per share and dividends recognized: Year Ended June 30, 2024 Year Ended June 30, 2023 Dividends per share $ — $ 12 Series A Mandatory Convertible Preferred Stock dividends ($000) — 27,600 Series B-1 Convertible Preferred Stock In connection with entering into the Merger Agreement, Coherent entered into an Amended and Restated Investment Agreement, dated as of March 30, 2021 (the “Investment Agreement”), with BCPE Watson (DE) SPV, LP, an affiliate of Bain Capital Private Equity, LP (the “Investor”). Pursuant to the terms of the Investment Agreement, on March 31, 2021, Coherent issued, sold, and delivered to the Investor 75,000 shares of a new Series B-1 Convertible Preferred Stock of the Company, no par value per share (“Series B-1 Preferred Stock”), for $10,000 per share (the “Equity Per Share Price”), resulting in an aggregate purchase price of $750 million. Following our provision of notice to the Investor of its election to offer the Upsize Shares, the Investor informed the Company on June 8, 2021, of its agreement to purchase the Upsize Shares from the Company immediately prior to the closing of the Coherent acquisition, increasing the Investor’s total equity commitment to Coherent pursuant to the Investment Agreement to $2.15 billion. On July 1, 2022, the Company issued and sold 140,000 shares of Coherent Series B-2 Convertible Preferred Stock, for $10,000 per share and an aggregate purchase price of $1.4 billion. The shares of Series B-1 Preferred Stock accrue dividends at 5.00% per annum, subject to increase if Coherent defaults on payment obligations with respect to the Series B-1 Preferred Stock, not to exceed 14% per annum. Until the fourth anniversary of March 31, 2021 (the “Initial Issue Date”), dividends are payable solely in-kind. After the fourth anniversary of the Initial Issue Date, dividends are payable on the applicable series, at the Company’s option, in cash, in-kind, or as a combination of both. The shares of Series B-1 Preferred Stock are convertible into shares of Coherent Common Stock as follows: • at the election of the holder, at a conversion price of $85 per share (as it may be adjusted from time to time, the “Conversion Price”), upon the delivery by Coherent to the holders of the Series B-1 Preferred Stock of an offer to repurchase the Series B-1 Preferred Stock upon the occurrence of a Fundamental Change (as defined in the Statement with Respect to Shares establishing the Series B Preferred Stock as defined below); and • at the election of the Company, any time following March 31, 2024, at the then-applicable Conversion Price if the volume-weighted average price of Coherent Common Stock exceeds 150% of the then-applicable Conversion Price for 20 trading days out of any 30 consecutive trading days. The issued shares of Series B-1 Preferred Stock currently have voting rights, voting as one class with the Coherent Common Stock and the Series B-2 Preferred Stock (as defined below), on an as-converted basis, subject to limited exceptions. On or at any time after March 31, 2031: • each holder has the right to require the Company to redeem all of their Series B-1 Preferred Stock, for cash, at a redemption price per share equal to the sum of the Stated Value (as defined in the Statement with Respect to Shares establishing the Series B Preferred Stock) for such shares plus an amount equal to all accrued or declared and unpaid dividends on such shares that had not previously been added to the Stated Value (such price the “Redemption Price,” and such right the “Put Right”), and • the Company has the right to redeem, in whole or in part, on a pro rata basis from all holders based on the aggregate number of shares of Series B-1 Preferred Stock outstanding, for cash, at the Redemption Price. In connection with any Fundamental Change (as defined in the Statement with Respect to Shares establishing the Series B Preferred Stock), and subject to the procedures set forth in the Statement with Respect to Shares establishing the Series B Preferred Stock, the Company must, or will cause the survivor of a Fundamental Change to, make an offer to repurchase, at the option and election of the holder thereof, each share of Series B-1 Preferred Stock then outstanding at a purchase price per share in cash equal to (i) the Stated Value for such shares plus an amount equal to all accrued or declared and unpaid dividends on such shares that had not previously been added to the Stated Value as of the date of repurchase plus (ii) if prior to March 31, 2026, the aggregate amount of all dividends that would have been paid (subject to certain exceptions), from the date of repurchase through March 31, 2026. If the Company defaults on a payment obligation with respect to the Series B-1 Preferred Stock, and such default is not cured within 30 days, the dividend rate will increase to 8% per annum and will be increased by an additional 2% per annum each quarter the Company remains in default, not to exceed 14% per annum. The Series B-1 Preferred Stock is redeemable for cash outside of the control of the Company upon the exercise of the Put Right, and upon a Fundamental Change, and is therefore classified as mezzanine equity. The Series B-1 Preferred Stock is initially measured at fair value less issuance costs, accreted to its redemption value over a 10-year period (using the effective interest method) with such accretion accounted for as deemed dividends and reductions to Net Earnings (Loss) available to Common Shareholders. We recognized $123 million and $117 million of preferred stock dividends during the fiscal years ended June 30, 2024, and June 30, 2023, respectively, which were presented as a reduction to retained earnings on the Consolidated Balance Sheet as of June 30, 2024. The following table presents dividends per share and dividends recognized for the years ended June 30, 2024, and June 30, 2023: Year Ended June 30, 2024 Year Ended June 30, 2023 Dividends per share $ 574 $ 542 Dividends ($000) 117,894 111,785 Deemed dividends ($000) 5,463 4,827

Earnings Per Share

Earnings Per Share	12 Months Ended
Earnings Per Share	Jun. 30, 2024
Earnings Per Share [Abstract]
Earnings Per Share	Earnings Per Share Basic earnings (loss) per common share is computed by dividing net earnings (loss) available to the common shareholders by the weighted-average number of shares of common stock outstanding during the period. Diluted earnings (loss) per common share is computed by dividing the diluted earnings (loss) available to the common shareholders by the weighted-average number of shares of common stock and potentially dilutive shares of common stock outstanding during the period. The dilutive effect of equity awards is calculated based on the average stock price for each fiscal period, using the treasury stock method. The shares of Coherent Common Stock issuable upon conversion of the Series B Convertible Preferred Stock are calculated under the If-Converted method. For the years ended June 30, 2024 and June 30, 2023, diluted earnings (loss) per share excluded the potentially dilutive effect of the performance and restricted shares, as well as the shares of Coherent Common Stock issuable upon conversion of the Series B Convertible Preferred Stock as their effects were anti-dilutive. For the fiscal year ended June 30, 2022, diluted shares outstanding include the dilutive effect of the potential shares of our common stock issuable from stock options, performance and restricted shares and the dilutive effect of the potential shares of our common stock issuable upon conversion of outstanding convertible debt. The following is a reconciliation of the numerators and denominators of the basic and diluted earnings (loss) per share computations for the periods presented ($000, except per share): Year Ended June 30, 2024 2023 2022 Numerator Net earnings (loss) attributable to Coherent Corp. $ (156,154) $ (259,458) $ 234,759 Deduct Series A preferred stock dividends — (27,600) (27,600) Deduct Series B dividends and deemed dividends (123,357) (116,612) (40,625) Basic earnings (loss) available to the common shareholders $ (279,511) $ (403,670) $ 166,534 Effect of dilutive securities: Add back interest on Convertible Notes (net of tax) $ — $ — $ 2,229 Diluted earnings (loss) available to the common shareholders $ (279,511) $ (403,670) $ 168,763 Denominator Weighted average shares 151,642 137,578 106,189 Effect of dilutive securities Common stock equivalents — — 3,012 Convertible Notes — — 7,312 Diluted weighted average common shares 151,642 137,578 116,513 Basic earnings (loss) per common share $ (1.84) $ (2.93) $ 1.57 Diluted earnings (loss) per common share $ (1.84) $ (2.93) $ 1.45 The following table presents potential shares of common stock excluded from the calculation of diluted net earnings (loss) per share, as their effect would have been antidilutive (in thousands of shares): Year Ended June 30, 2024 2023 2022 Series A Mandatory Convertible Preferred Stock — 10,423 8,915 Series B Convertible Preferred Stock 27,691 26,349 9,162 Common stock equivalents 2,940 2,271 9,611 Total anti-dilutive shares 30,631 39,043 27,688

Noncontrolling Interests

Noncontrolling Interests	12 Months Ended
Noncontrolling Interests	Jun. 30, 2024
Noncontrolling Interest [Abstract]
Noncontrolling Interests	Noncontrolling Interests On December 4, 2023, Silicon Carbide LLC (“Silicon Carbide”), one of the Company’s subsidiaries, completed (i) the sale of 16,666,667 Class A Common Units to Denso Corporation (“Denso”) for $500,000,000 pursuant to an Investment Agreement, dated as of October 10, 2023, by and between Silicon Carbide and Denso and (ii) the sale of 16,666,667 Class A Common Units to Mitsubishi Electric Corporation (“MELCO”) for $500,000,000 pursuant to an Investment Agreement, dated as of October 10, 2023, by and between Silicon Carbide and MELCO (collectively, the “Equity Investments”). As a consequence of the Equity Investments, the Company’s ownership interest in the Class A Common Units of Silicon Carbide LLC was reduced to approximately 75%. Denso and MELCO each, individually, own approximately 12.5% of the Class A Common Units of Silicon Carbide LLC. The Equity Investments in Silicon Carbide will enable Coherent to increase its available free cash flow to provide greater financial and operational flexibility to execute its capital allocation priorities, as the aggregate $1 billion investment, net of transaction costs, will be used to fund future capital expansion of Silicon Carbide. The following table presents the activity in noncontrolling interests in Silicon Carbide ($000): Year Ended June 30, 2024 Beginning balance $ — Sale of shares to noncontrolling interests 373,573 Share of foreign currency translation adjustments 429 Net loss (2,610) Ending balance $ 371,392

Leases

Leases	12 Months Ended
Leases	Jun. 30, 2024
Leases [Abstract]
Leases	Leases The determination of whether an arrangement is, or contains, a lease is performed at the inception of the arrangement. Classification and initial measurement of the right-of-use asset and lease liability are determined at the lease commencement date. The Company elected the short-term lease measurement and recognition exemption; therefore, leases with an initial term of 12 months or less are not recorded on the balance sheet. Finance leases are generally those that allow us to substantially utilize or pay for the entire asset over its estimated useful life. Finance lease assets are recorded in Property, plant and equipment, net, and finance lease liabilities within Other accrued liabilities Other liabilities Operating leases are recorded in Other assets and Operating lease liabilities, current and non-current on our Consolidated Balance Sheets. Operating lease assets are amortized on a straight-line basis in operating expenses over the lease term. Our lease liabilities are recognized based on the present value of the remaining fixed lease payments, over the lease term, using a discount rate of similarly secured borrowings available to the Company. For the purpose of lease liability measurement, we consider only payments that are fixed and determinable at the time of commencement. Any variable payments that depend on an index or rate are expensed as incurred. We account for non-lease components, such as common area maintenance, as a component of the lease, and include it in the initial measurement of our lease assets and corresponding liabilities. Our lease terms and conditions may include options to extend or terminate. An option is recognized when it is reasonably certain that we will exercise that option. Our lease assets also include any lease payments made, and exclude any lease incentives received prior to commencement. Our lease assets are tested for impairment in the same manner as long-lived assets used in operations. The following table presents lease costs, which include leases for arrangements with an initial term of more than 12 months, lease term, and discount rates ($000): Year Ended June 30, 2024 2023 2022 Finance Lease Cost Amortization of right-of-use assets $ 1,667 $ 1,667 $ 1,671 Interest on lease liabilities 1,040 1,124 1,200 Total finance lease cost 2,707 2,791 2,871 Operating lease cost 52,909 53,127 36,716 Sublease income — — 507 Total lease cost $ 55,616 $ 55,918 $ 39,080 Cash Paid for Amounts Included in the Measurement of Lease Liabilities Operating cash flows from finance leases 1,040 1,124 1,200 Operating cash flows from operating leases 50,672 50,503 35,481 Financing cash flows from finance leases 1,584 1,430 1,290 Assets Obtained in Exchange for Lease Liabilities Right-of-use assets obtained in acquisitions — 56,315 — Right-of-use assets obtained in exchange for new operating lease liabilities 64,385 27,720 18,161 Total assets obtained in exchange for new operating lease liabilities 64,385 84,035 18,161 Weighted-Average Remaining Lease Term (in Years) Finance leases 7.5 8.5 9.5 Operating leases 6.6 6.9 6.6 Weighted-Average Discount Rate Finance leases 5.6 % 5.6 % 5.6 % Operating leases 6.8 % 5.5 % 5.7 % The following table presents future minimum lease payments, which includes leases for arrangements with an initial term of more than 12 months ($000): Future Years Operating Leases Finance Leases Total Year 1 $ 52,461 $ 2,697 $ 55,158 Year 2 44,876 2,771 47,647 Year 3 34,923 2,847 37,770 Year 4 26,469 2,925 29,394 Year 5 23,833 3,006 26,839 Thereafter 75,033 7,757 82,790 Total minimum lease payments $ 257,595 $ 22,003 $ 279,598 Less: amounts representing interest 54,660 4,120 58,780 Present value of total lease liabilities $ 202,935 $ 17,883 $ 220,818
Leases	Leases The determination of whether an arrangement is, or contains, a lease is performed at the inception of the arrangement. Classification and initial measurement of the right-of-use asset and lease liability are determined at the lease commencement date. The Company elected the short-term lease measurement and recognition exemption; therefore, leases with an initial term of 12 months or less are not recorded on the balance sheet. Finance leases are generally those that allow us to substantially utilize or pay for the entire asset over its estimated useful life. Finance lease assets are recorded in Property, plant and equipment, net, and finance lease liabilities within Other accrued liabilities Other liabilities Operating leases are recorded in Other assets and Operating lease liabilities, current and non-current on our Consolidated Balance Sheets. Operating lease assets are amortized on a straight-line basis in operating expenses over the lease term. Our lease liabilities are recognized based on the present value of the remaining fixed lease payments, over the lease term, using a discount rate of similarly secured borrowings available to the Company. For the purpose of lease liability measurement, we consider only payments that are fixed and determinable at the time of commencement. Any variable payments that depend on an index or rate are expensed as incurred. We account for non-lease components, such as common area maintenance, as a component of the lease, and include it in the initial measurement of our lease assets and corresponding liabilities. Our lease terms and conditions may include options to extend or terminate. An option is recognized when it is reasonably certain that we will exercise that option. Our lease assets also include any lease payments made, and exclude any lease incentives received prior to commencement. Our lease assets are tested for impairment in the same manner as long-lived assets used in operations. The following table presents lease costs, which include leases for arrangements with an initial term of more than 12 months, lease term, and discount rates ($000): Year Ended June 30, 2024 2023 2022 Finance Lease Cost Amortization of right-of-use assets $ 1,667 $ 1,667 $ 1,671 Interest on lease liabilities 1,040 1,124 1,200 Total finance lease cost 2,707 2,791 2,871 Operating lease cost 52,909 53,127 36,716 Sublease income — — 507 Total lease cost $ 55,616 $ 55,918 $ 39,080 Cash Paid for Amounts Included in the Measurement of Lease Liabilities Operating cash flows from finance leases 1,040 1,124 1,200 Operating cash flows from operating leases 50,672 50,503 35,481 Financing cash flows from finance leases 1,584 1,430 1,290 Assets Obtained in Exchange for Lease Liabilities Right-of-use assets obtained in acquisitions — 56,315 — Right-of-use assets obtained in exchange for new operating lease liabilities 64,385 27,720 18,161 Total assets obtained in exchange for new operating lease liabilities 64,385 84,035 18,161 Weighted-Average Remaining Lease Term (in Years) Finance leases 7.5 8.5 9.5 Operating leases 6.6 6.9 6.6 Weighted-Average Discount Rate Finance leases 5.6 % 5.6 % 5.6 % Operating leases 6.8 % 5.5 % 5.7 % The following table presents future minimum lease payments, which includes leases for arrangements with an initial term of more than 12 months ($000): Future Years Operating Leases Finance Leases Total Year 1 $ 52,461 $ 2,697 $ 55,158 Year 2 44,876 2,771 47,647 Year 3 34,923 2,847 37,770 Year 4 26,469 2,925 29,394 Year 5 23,833 3,006 26,839 Thereafter 75,033 7,757 82,790 Total minimum lease payments $ 257,595 $ 22,003 $ 279,598 Less: amounts representing interest 54,660 4,120 58,780 Present value of total lease liabilities $ 202,935 $ 17,883 $ 220,818

Share-Based Compensation

Share-Based Compensation	12 Months Ended
Share-Based Compensation	Jun. 30, 2024
Share-Based Payment Arrangement [Abstract]
Share-Based Compensation	Share-Based Compensation The Company’s Board of Directors amended the Coherent Corp. 2018 Omnibus Incentive Plan, which originally was approved by the Company’s shareholders at the Annual Meeting in November 2018, as the Coherent Corp. Omnibus Incentive Plan (as amended and restated, the “Plan”). The Plan was approved at the Annual Meeting in November 2023. The Plan provides for the grant of stock options, stock appreciation rights, restricted shares, restricted share units, deferred shares, performance shares and performance share units to employees, officers and directors of the Company. The maximum number of shares of Coherent Common Stock authorized for issuance under the Plan is limited to 13,450,000 shares of Coherent Common Stock, not including any remaining shares forfeited under the predecessor plans that may be rolled into the Plan. Certain awards under the Plan have certain vesting provisions predicated upon the death, retirement or disability of the grantee. On the Closing Date, the Company assumed the Coherent, Inc. Equity Incentive Plan (“Coherent, Inc. Plan”) and the Coherent, Inc. unvested restricted stock units (“Converted RSUs”) that are generally subject to the same terms and conditions that applied to the Converted RSUs immediately prior to the Closing Date. After the Closing Date, the Company granted restricted stock units under the Coherent, Inc. Plan through August 28, 2023. The Coherent, Inc. Plan was terminated upon adoption of the Plan in November 2023. No additional awards will be granted under the Coherent, Inc. Plan. As of June 30, 2024, there were approximately 6 million shares available to be issued under the Plan, including forfeited shares from predecessor plans. On June 3, 2024, the Board of Directors granted 147,214 restricted stock units vesting over three years from date of grant and 694,007 performance stock units vesting over the approximate three-year period ending June 30, 2027, to the new CEO. The grants were non-Plan “employment inducement awards” as contemplated by the New York Stock Exchange Listing Rule 303A.08 and therefore were not made pursuant to the Plan. The Company has an Employee Stock Purchase Plan whereby eligible employees may authorize payroll deductions of up to 10%, or such other percentage up to 15% that the Company determines, of their regular base salary to purchase shares at the lower of 85% of the fair market value of the common stock on the date of commencement of the offering or on the last day of the six-month offering period. We record share-based compensation expense for these awards, which requires the recognition of the grant-date fair value of share-based compensation in net earnings. We recognize the share-based compensation expense over the requisite service period of the individual grantees, which generally equals the vesting period. We account for cash-based stock appreciation rights, cash-based restricted share units and cash-based performance share units as liability awards. Share-based compensation expense for the fiscal years ended June 30, 2024, 2023 and 2022 is as follows ($000): Year Ended June 30, 2024 2023 2022 Stock Options and Cash-Based Stock Appreciation Rights $ 1,149 $ 2,602 $ 3,218 Restricted Share Awards and Cash-Based Restricted Share Unit Awards 92,634 124,212 56,365 Performance Share Awards and Cash-Based Performance Share Unit Awards 21,912 14,998 10,077 Employee Stock Purchase Plan 11,200 7,819 3,443 $ 126,895 $ 149,631 $ 73,103 Stock Options and Cash-Based Stock Appreciation Rights We utilize the Black-Scholes valuation model for estimating the fair value of stock options and cash-based stock appreciation rights. During the fiscal years ended June 30, 2024, June 30, 2023 and June 30, 2022, no stock options were issued. Stock option and cash-based stock appreciation rights activity during the fiscal year ended June 30, 2024 was as follows: Stock Options Cash-Based Stock Appreciation Rights Number of Weighted Average Number of Weighted Average Outstanding - June 30, 2023 2,186,944 $ 30.15 102,890 $ 35.12 Exercised (685,615) $ 24.64 (53,932) $ 34.90 Forfeited and Expired (10,684) $ 39.74 (2,087) $ 32.70 Outstanding - June 30, 2024 1,490,645 $ 32.62 46,871 $ 35.48 Exercisable - June 30, 2024 1,490,645 $ 32.62 46,871 $ 35.48 As of June 30, 2024, 2023 and 2022, the aggregate intrinsic value of stock options and cash-based stock appreciation rights outstanding and exercisable was $61 million, $44 million and $48 million, respectively. Aggregate intrinsic value represents the total pretax intrinsic value (the difference between our closing stock price on the last trading day of the year ended June 30, and the option’s exercise price, multiplied by the number of in-the-money options) that would have been received by the option holders had all option holders exercised their options on June 30, 2024. This amount varies based on the fair market value of the Company’s stock. The total intrinsic value of stock options and cash-based stock appreciation rights exercised during the fiscal years ended June 30, 2024, 2023, and 2022 was $25 million, $5 million, and $8 million, respectively. As of June 30, 2024, there was no unrecognized compensation cost related to non-vested stock options and cash-based stock appreciation rights. Outstanding and exercisable stock options at June 30, 2024 were as follows: Stock Options and Cash-Based Stock Stock Options and Cash-Based Stock Number of Weighted Weighted Number of Weighted Weighted Range of Shares or Contractual Term Exercise Shares or Contractual Term Exercise Exercise Prices Rights (Years) Price Rights (Years) Price $13.34 - $18.07 220,107 1.08 $ 17.68 220,107 1.08 $ 17.68 $18.07 - $24.35 294,425 2.08 $ 21.52 294,425 2.08 $ 21.52 $24.35 - $35.39 300,515 3.57 $ 33.94 300,515 3.57 $ 33.94 $35.39 - $36.90 420,798 5.22 $ 36.45 420,798 5.22 $ 36.45 $36.90 - $49.90 301,671 4.05 $ 48.14 301,671 4.05 $ 48.14 1,537,516 3.47 $ 32.71 1,537,516 3.47 $ 32.71 Restricted Share Awards, Restricted Share Units, and Cash-Based Restricted Share Units Restricted share awards, restricted share units, and cash-based restricted share units compensation expense was calculated based on the number of shares or units expected to be earned by the grantee multiplied by the stock price at the date of grant (for restricted share awards and restricted share units) or the stock price at the period end date (for cash-based restricted share units), and is being recognized over the vesting period. Generally, the restricted share awards, restricted share units, and cash-based restricted share units have a three-year tranche vesting provision. There were no restricted share awards issued in the fiscal years ending June 30, 2024 and June 30, 2023, and all previous restricted share awards have been amortized in full. Restricted share unit and cash-based restricted share unit activity during the fiscal year ended June 30, 2024, was as follows: Restricted Share Units Cash-Based Restricted Share Units Number of Weighted Average Number of Weighted Average Nonvested - June 30, 2023 3,521,954 $ 53.33 5,975 $ 53.12 Granted 2,740,565 $ 39.95 6,876 $ 38.04 Vested (2,021,002) $ 50.89 (3,062) $ 52.02 Forfeited (173,632) $ 45.94 (805) $ 41.45 Nonvested - June 30, 2024 4,067,885 $ 45.84 8,984 $ 43.00 As of June 30, 2024, total unrecognized compensation cost related to non-vested, restricted share units and cash-based restricted share units was $96 million. This cost is expected to be recognized over a weighted-average period of approximately two years. The restricted share unit compensation expense was calculated based on the number of shares expected to be earned, multiplied by the stock price at the date of grant, and is being recognized over the vesting period. The cash-based restricted share unit compensation expense was calculated based on the number of units expected to be earned, multiplied by the stock price at the period-end date, and is being recognized over the vesting period. The total fair value of the restricted share awards, restricted share units, and cash-based restricted share units granted during the years ended June 30, 2024, 2023 and 2022, was $110 million, $102 million and $54 million, respectively. The total fair value of restricted share awards, restricted share units and cash-based restricted share units vested was $74 million, $131 million and $67 million during fiscal years 2024, 2023 and 2022, respectively. Performance Share Units The Compensation Committee of the Board of Directors of the Company has granted certain executive officers and employees performance share units under the Plan. As of June 30, 2024, we had outstanding grants covering performance periods ranging from 12 to 36 months. These grants are intended to provide continuing emphasis on specified financial performance goals that the Company considers important contributors to the creation of long-term shareholder value. These grants are payable only if the Company achieves specified levels of financial performance during the performance periods. For our relative Total Shareholder Return (“TSR”) performance-based units, which are based on market performance of our stock as compared to the S&P Composite 1500 – Electronic Equipment, Instruments & Components Index, the compensation cost is recognized over the performance period on a straight-line basis, because the grants vest only at the end of the measurement period, and the probability of actual shares expected to be earned is considered in the grant date valuation. As a result, the expense is not adjusted to reflect the actual shares earned. We estimate the fair value of the TSR performance-based units using the Monte-Carlo simulation model. The performance share unit compensation expense was calculated based on the number of shares expected to be earned, multiplied by the stock price at the date of grant, and is being recognized over the vesting period. Performance share unit activity relating to the Plan during the year ended June 30, 2024, was as follows: Performance Share Units Number of Units Weighted Average Grant Date Fair Value Nonvested - June 30, 2023 882,637 $ 36.11 Granted 1,244,605 $ 90.71 Vested (86,984) $ 45.12 Forfeited (337,517) $ 44.67 Nonvested - June 30, 2024 1,702,741 $ 73.86

Segment and Geographic Reportin

Segment and Geographic Reporting	12 Months Ended
Segment and Geographic Reporting	Jun. 30, 2024
Segment Reporting [Abstract]
Segment and Geographic Reporting	Segment and Geographic Reporting Our Chief Executive Officer has been identified as the chief operating decision maker (“CODM”) as he utilizes financial information to make decisions about allocating resources and assessing performance for the entire Company, which is used in the decision-making process to assess performance. We determine our reportable business segments based on the way the CODM organizes business segments within the Company for making operating decisions and assessing performance. Effective July 1, 2022, we report our financial results in the following three segments: (i) Networking, (ii) Materials, and (iii) Lasers. The Networking segment has locations in the United States, Australia, China, Germany, Malaysia, South Korea, Thailand, the Philippines, the United Kingdom, and Vietnam . This segment address all of Coherent’s four end markets, namely: communications, industrial, electronics, and instrumentation, with a concentration in the communications market. This segment leverages Coherent’s compound semiconductor technology platforms and deep knowledge of end-user applications for our key end markets to deliver differentiated components and subsystems. The Materials segment has locations in the United States, Belgium, China, Germany, Italy, Japan, Singapore, South Korea, Sweden, Switzerland, Taiwan, the Philippines, the United Kingdom, and Vietnam. This segment address all of Coherent’s four end markets, namely: communications, industrial, electronics, and instrumentation, with concentrations in the industrial and electronics markets. The Materials segment is a market leader in engineered materials and optoelectronic devices, such as those based on ZnSe, ZnS, GaAs, InP, GaSb, and SiC. The Lasers segment has locations in the United States, Finland, Germany, Malaysia, Singapore, South Korea, Spain, Sweden, Switzerland, and the United Kingdom. The Lasers segment’s lasers and optics products serve industrial customers in semiconductor capital equipment, display capital equipment, precision manufacturing, and aerospace & defense, as well as instrumentation customers in life sciences and scientific research. To the extent possible, our corporate expenses are allocated to the segments. The Company’s CODM evaluates the performance of its segments based upon reported segment operating income (loss), which is defined as earnings (loss) from operations before income taxes, interest and other income or expense. Unallocated and Other include eliminating inter-segment sales and transfers as well as transaction costs related to the Coherent acquisition, before its close, in the fiscal year ended June 30, 2022. The following tables summarize selected financial information of our operations by segment ($000): 2024 Networking Materials Lasers Unallocated Total Revenues $ 2,295,729 $ 1,016,573 $ 1,395,386 $ — $ 4,707,688 Inter-segment revenues 45,767 457,623 5,212 (508,602) — Operating income (loss) 178,789 62,876 (145,544) — 96,121 Interest expense — — — — (288,475) Other income (expense), net — — — — 44,707 Income taxes — — — — (11,117) Net loss — — — — (158,764) Net loss attributable to Coherent Corp. — — — — (156,154) Depreciation and amortization 161,499 108,979 289,283 — 559,761 Expenditures for property, plant & equipment 90,950 224,482 31,384 — 346,816 Segment assets 3,543,981 3,502,642 7,442,011 — 14,488,634 Goodwill 1,036,592 245,983 3,181,754 — 4,464,329 2023 Networking Materials Lasers Unallocated Total Revenues $ 2,340,930 $ 1,349,758 $ 1,469,412 $ — $ 5,160,100 Inter-segment revenues 70,120 362,179 1,517 (433,817) — Operating income (loss) 222,365 159,581 (419,066) — (37,120) Interest expense — — — — (286,872) Other income (expense), net — — — — (31,566) Income taxes — — — — 96,100 Net loss attributable to Coherent Corp. — — — — (259,458) Depreciation and amortization 172,339 143,243 366,105 — 681,687 Expenditures for property, plant & equipment 98,192 274,434 63,434 — 436,060 Segment assets 3,316,555 2,561,156 7,833,422 — 13,711,133 Goodwill 1,036,204 247,695 3,228,801 — 4,512,700 2022 Networking Materials Lasers Unallocated Total Revenues $ 2,197,249 $ 1,119,367 $ — $ — $ 3,316,616 Inter-segment revenues 93,660 272,580 — (366,240) — Operating income (loss) 231,563 218,601 — (35,870) 414,294 Interest expense — — — — (121,254) Other income (expense), net — — — — (11,233) Income taxes — — — — (47,048) Net earnings attributable to Coherent Corp. — — — — 234,759 Depreciation and amortization 172,092 114,687 — — 286,779 Expenditures for property, plant & equipment 89,616 224,716 — — 314,332 Segment Assets 4,897,252 2,947,594 — — 7,844,846 Goodwill 1,013,277 272,482 — — 1,285,759 Geographic information for revenues by location of the customer’s headquarters, were as follows ($000): Revenues Year Ended June 30, 2024 2023 2022 North America $ 2,622,569 $ 2,745,891 $ 1,771,385 Europe 714,282 979,911 623,157 China 621,918 577,180 614,393 Japan 340,863 392,479 196,512 Rest of World 408,056 464,639 111,169 Total $ 4,707,688 $ 5,160,100 $ 3,316,616 Major Customers We had one major customer who accounted for 10% of consolidated revenue during fiscal 2024. The customer purchased primarily from our Networking segment. We had another major customer who accounted for 10% of consolidated revenue during fiscal 2023. The customer purchased primarily from our Networking segment. Geographic information for long-lived assets by country, which include property, plant and equipment, net of related depreciation, and certain other long-term assets, were as follows ($000): Long-Lived Assets June 30, 2024 2023 United States $ 1,226,359 $ 1,069,012 Non-United States China 349,195 365,331 Germany 209,593 216,336 United Kingdom 19,153 77,474 Malaysia 87,783 70,424 Switzerland 44,256 47,110 Sweden 44,733 38,981 Korea 17,862 20,869 Vietnam 20,707 17,739 Australia 8,611 8,641 Taiwan 6,705 7,883 Philippines 11,217 7,205 Other 23,166 24,853 Total Non-United States 842,981 902,846 $ 2,069,340 $ 1,971,858

Fair Value of Financial Instrum

Fair Value of Financial Instruments	12 Months Ended
Fair Value of Financial Instruments	Jun. 30, 2024
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	Fair Value of Financial Instruments The FASB defines fair value as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous markets for the asset and liability in an orderly transaction between market participants at the measurement date. We estimate fair value of our financial instruments utilizing an established three-level hierarchy in accordance with U.S. GAAP. The hierarchy is based upon the transparency of inputs to the valuation of an asset or liability as of the measurement date as follows: • Level 1 – Valuation is based upon unadjusted quoted prices for identical assets or liabilities in active markets. • Level 2 – Valuation is based upon quoted prices for similar assets and liabilities in active markets, or other inputs that are observable for the asset or liability, either directly or indirectly, for substantially the full term of the financial instruments. • Level 3 – Valuation is based upon other unobservable inputs that are significant to the fair value measurements. The classification of fair value measurements within the hierarchy is based upon the lowest level of input that is significant to the measurement. We entered into an interest rate swap with a notional amount of $1,075 million to limit the exposure to our variable interest rate debt by effectively converting it to a fixed interest rate. We receive payments based on the one-month LIBOR and make payments based on a fixed rate of 1.52%. We receive payments with a floor of 0.00%. The interest rate swap agreement had an effective date of November 24, 2019, with an expiration date of September 24, 2024. The initial notional amount of the interest rate swap decreased to $825 million in June 2022, and will remain at that amount through the expiration date. On March 20, 2023, we amended our $825 million interest rate swap (“Amended Swap”), effective as of February 28, 2023, to replace the current reference rate (LIBOR) with SOFR, to be consistent with Amendment no. 1 to the Credit Agreement. See Note 8. Debt for further information. Under the Amended Swap, we receive payments based on the one-month SOFR and make payments based on a fixed rate of 1.42%. We receive payments with a floor of 0.10%. We designated this instrument as a cash flow hedge, and deemed the hedge relationship effective at inception of the contract and the amended contract. The fair value of the interest rate swap of $8 million and $37 million is recognized in the Consolidated Balance Sheets within Prepaid and other current assets and Other assets On February 23, 2022, we entered into an interest rate cap (“the Cap”) with an effective date of July 1, 2023. On March 20, 2023, we amended the Cap to replace the current reference rate (LIBOR) with SOFR, to be consistent with Amendment No. 1 to the Credit Agreement. See Note 8. Debt for further information. The Cap manages our exposure to interest rate movements on a portion of our floating rate debt. The Cap provides us with the right to receive payment if one-month SOFR exceeds 1.92%. Beginning in July 2023, we will begin to pay a fixed monthly premium based on an annual rate of 0.853% for the Cap. The Cap will carry a notional amount ranging from $500 million to $1,500 million. The fair value of the interest rate cap of $50 million and $46 million is recognized in the Consolidated Balance Sheets within prepaid and other current and other assets The Cap, as amended, is designed to mirror the terms of the Company’s Credit Agreement as amended on March 31, 2023. We designated the Cap as a cash flow hedge of the variability of the SOFR based interest payments on the Term Facilities. Every period over the life of the hedging relationship, the entire change in fair value related to the hedging instrument will first be recorded within Accumulated other comprehensive income (loss). Amounts accumulated in accumulated other comprehensive income (loss) will be reclassified into interest expense in the same period or periods in which interest expense is recognized on the Credit Agreement, or its direct replacement. The fair value of the Cap is determined using widely accepted valuation techniques and reflects the contractual terms of the Cap including the period to maturity, and while there are no quoted prices in active markets, it uses observable market-based inputs, including interest rate curves. The fair value analysis also considers a credit valuation adjustment to reflect nonperformance risk of both the Company and the single counterparty. The Cap is classified as a Level 2 item within the fair value hierarchy. We estimated the fair value of the Senior Notes, Term A Facility and Term B Facility (“Debt Facilities”) based on quoted market prices as of the last trading day prior to June 30, 2024; however, the Debt Facilities have only a limited trading volume and as such this fair value estimate is not necessarily the value at which the Debt Facilities could be retired or transferred. We concluded that this fair value measurement should be categorized within Level 2. The carrying values of the Debt Facilities are net of unamortized discount and issuance costs. See Note 8. Debt for further information on the Company’s debt facilities. The fair value and carrying value of the Debt Facilities were as follows at June 30, 2024 ($000): Fair Value Carrying Value Senior Notes $ 938,193 $ 984,061 Term A Facility 777,564 762,039 Term B Facility 2,390,497 2,334,701 Our borrowings, including our lease obligations and the Debt Facilities, are considered Level 2 among the fair value hierarchy. Cash and cash equivalents are considered Level 1 among the fair value hierarchy and approximate fair value because of the short-term maturity of those instruments. At June 30, 2024, total restricted cash of $864 million includes $858 million of cash in Silicon Carbide LLC that is restricted for use only by that subsidiary and $5 million of cash restricted for other purposes in other entities. At June 30, 2023, total restricted cash of $16 million consisted of cash restricted for other purposes in other entities. The restricted cash is invested in money market accounts and time deposits, with maturities of one year or less, that are held-to-maturity, are considered Level 1 among the fair value hierarchy and approximate fair value. Restricted cash that is expected to be spent and released from restriction after 12 months is classified as non-current on the Consolidated Balance Sheets. We, from time to time, purchase foreign currency forward exchange contracts, that permit us to sell specified amounts of these foreign currencies for pre-established U.S. dollar amounts at specified dates that represent assets or liabilities on the balance sheets of certain subsidiaries. These contracts are entered into for the purposes of limiting translational exposure to changes in currency exchange rates and which otherwise would expose our earnings, on the revaluation of our aggregate net assets or liabilities in respective currencies, to foreign currency risk. At June 30, 2024, we had foreign currency forward contracts recorded at fair value. The fair values of these instruments were measured using valuations based upon quoted prices for similar assets and liabilities in active markets (Level 2) and are valued by reference to similar financial instruments, adjusted for credit risk and restrictions and other terms specific to the contracts. Realized losses related to these contracts for the year ended June 30, 2024 were $15 million and for June 30, 2023 and June 30, 2022 were gains of $0.2 million and losses of $27 million, respectively, and were included in Other expense (income), net in the Consolidated Statements of Earnings (Loss). Our non-financial assets, such as goodwill, intangible assets, and property, plant and equipment, are assessed for impairment when an event or circumstance indicates that a decline in value may have occurred. See Note 1. Nature of Business and Summary of Significant Accounting Policies for further information.

Employee Benefit Plans

Employee Benefit Plans	12 Months Ended
Employee Benefit Plans	Jun. 30, 2024
Retirement Benefits [Abstract]
Employee Benefit Plans	Employee Benefit Plans Eligible employees of the Company participate in an employee retirement plan. Under the Coherent Corp 401(k) Profit Sharing Plan (“Plan”), we match employee contributions to the plan equal to an amount of 50% of employee contributions up to a maximum of 8% of the employee’s individual earnings subject to IRS limitations. Employees become eligible for participation and Company matching contributions on their first day of employment. The Company’s matching contributions (net of forfeitures) during fiscal 2024, 2023 and 2022 were $18 million, $11 million, and $10 million, respectively. In addition, the Plan has a profit sharing retirement plan contribution for eligible U.S. employees of the Company. These contributions are made at the discretion of the Company’s Board of Directors and were $2 million for each of the years ended June 30, 2024, 2023 and 2022. Under the Coherent, Inc. Employee Retirement and Investment Plan, we matched employee contributions through December 31, 2023 to the plan up to a maximum of 4% of the employee’s individual earnings subject to IRS limitations. Employees become eligible for participation and Company matching contributions on their first day of employment. The Company’s matching contributions (net of forfeitures) during fiscal 2024 and 2023 were $3 million and $7 million, respectively. Effective January 1, 2024, we merged the Coherent, Inc. Employee Retirement and Investment Plan into the Plan. Switzerland Defined Benefit Plan The Company maintains a pension plan covering employees of our Swiss subsidiary (the “Swiss Plan”). Employer and employee contributions are made to the Swiss Plan based on various percentages of salary and wages that vary according to employee age and other factors. Employer contributions to the Swiss Plan were $4 million for both years ended June 30, 2024 and 2023. Net periodic pension cost is not material for any year presented. The underfunded pension liability was $17 million and $11 million as of June 30, 2024 and 2023, respectively. The pension adjustment amount recognized in accumulated other comprehensive income (loss) was a $7 million decrease for both fiscal years ended June 30, 2024 and 2023. The accumulated benefit obligation was $106 million as of June 30, 2024, compared to $97 million as of June 30, 2023. Coherent, Inc. Defined Benefit Plans As a result of the Coherent, Inc. acquisition on July 1, 2022, we assumed all assets and liabilities of defined benefit plans in the U.S., Germany, South Korea, Japan, Spain, and Italy (“acquired plans”). As is the customary practice with European and Asian companies, the plans are unfunded, with the exception of the Spanish plan which is partially funded. The U.S. qualified plan is also partially funded. Any new employees hired after January 1, 2007, are not eligible for the U.S. qualified and nonqualified plans. Effective August 31, 2018, both of the U.S. plans were amended to freeze all future compensation benefit accruals. Any new employees hired after 2000 are not eligible for the primary German pension plans. For two of the German plans and the U.S. qualified plan, unrealized gains and losses are recognized as a component of other comprehensive income (loss) within shareholders’ equity. For the other plans, we have elected to recognize all actuarial gains and losses on these plans immediately, as incurred. Liabilities and expense for pension benefits are determined using actuarial methodologies and incorporate significant assumptions, including the interest rate used to discount the future estimated cash flows, the expected long-term rate of return on plan assets, and several assumptions relating to the employee workforce (salary increases, retirement age, and mortality). All of these assumptions were based upon management’s judgment, considering all known trends and uncertainties. Actual results that differ from these assumptions would impact future expense recognition and the cash funding requirements of our defined benefit plans. For the acquired plans, employer contributions in the years ended June 30, 2024 and June 30, 2023 were $2 million and $1 million, respectively, and net periodic pension cost was not material in either year. The underfunded pension liability was $34 million and $32 million as of June 30, 2024 and June 30, 2023, respectively. The pension adjustment amount recognized in accumulated other comprehensive income (loss) was a $1 million decrease and a $1 million increase for the fiscal years ended June 30, 2024 and June 30, 2023, respectively. The accumulated benefit obligation was $44 million and $42 million as of June 30, 2024 and June 30, 2023, respectively. Estimated future benefit payments under all plans are estimated to be as follows ($000): Year Ending June 30, 2025 $ 9,100 2026 7,800 2027 7,800 2028 8,500 2029 9,500 Next five years 53,000

Other Accrued Liabilities

Other Accrued Liabilities	12 Months Ended
Other Accrued Liabilities	Jun. 30, 2024
Payables and Accruals [Abstract]
Other Accrued Liabilities	Other Accrued Liabilities The components of other accrued liabilities were as follows ($000): June 30, 2024 2023 Contract liabilities $ 62,123 $ 104,477 Warranty reserves 44,193 47,563 Other accrued liabilities 188,390 158,241 $ 294,706 $ 310,281

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
Commitments and Contingencies	Jun. 30, 2024
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies We have purchase commitments for materials and supplies as part of the ordinary conduct of business. A portion of the commitments are long-term and are based on minimum purchase requirements. Certain short-term raw material purchase commitments have a variable price component which is based on market pricing at the time of purchase. Due to the proprietary nature of some of our materials and processes, certain contracts may contain liquidated damage provisions for early termination. We do not believe that a significant amount of liquidated damages are reasonably likely to be incurred under these commitments, based upon historical experience and current expectations. Total future purchase commitments held by Coherent as of June 30, 2024 were $697 million in fiscal 2025 and $54 million thereafter.

Share Repurchase Programs

Share Repurchase Programs	12 Months Ended
Share Repurchase Programs	Jun. 30, 2024
Equity [Abstract]
Share Repurchase Programs	Share Repurchase Programs In August 2014, the Company’s Board of Directors authorized the Company to purchase up to $50 million of its common stock through a share repurchase program (the “Program”) that calls for shares to be purchased in the open market or in private transactions from time to time. The Program has no expiration and may be suspended or discontinued at any time. Shares purchased by the Company are retained as treasury stock and available for general corporate purposes. We did not repurchase any shares pursuant to this Program during the fiscal years ended June 30, 2024 or June 30, 2023. As of June 30, 2024, we have cumulatively purchased 1,416,587 shares of Coherent common stock pursuant to the Program for approximately $22 million. On February 21, 2024, the Company’s Board of Directors terminated the Program and any remaining amount authorized for the repurchase of shares.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	12 Months Ended
Accumulated Other Comprehensive Income (Loss)	Jun. 30, 2024
Equity [Abstract]
Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) The changes in accumulated other comprehensive income (loss) by component, net of tax, for the years ended June 30, 2024, 2023, and 2022 were as follows ($000): Foreign Interest Interest Defined Total AOCI - June 30, 2021 $ 55,395 $ (31,773) $ — $ (9,355) $ 14,267 Other comprehensive income (loss) before reclassifications (89,967) 29,711 14,306 15,300 (30,650) Amounts reclassified from AOCI — 13,797 — 419 14,216 Net current-period other comprehensive income (loss) (89,967) 43,508 14,306 15,719 (16,434) AOCI - June 30, 2022 $ (34,572) $ 11,735 $ 14,306 $ 6,364 $ (2,167) Other comprehensive income (loss) before reclassifications 87,927 27,050 22,322 (5,326) 131,973 Amounts reclassified from AOCI — (19,301) — (779) (20,080) Net current-period other comprehensive income (loss) 87,927 7,749 22,322 (6,105) 111,893 AOCI - June 30, 2023 $ 53,355 $ 19,484 $ 36,628 $ 259 $ 109,726 Other comprehensive income (loss) before reclassifications (82,318) 9,529 15,420 (6,708) (64,077) Amounts reclassified from AOCI — (32,414) (12,731) (735) (45,880) Net current-period other comprehensive income (loss) (82,318) (22,885) 2,689 (7,443) (109,957) AOCI - Reclass related to sale of shares to noncontrolling interests 2,871 — — — 2,871 AOCI - June 30, 2024 $ (26,092) $ (3,401) $ 39,317 $ (7,184) $ 2,640

Restructuring Plan

Restructuring Plan	12 Months Ended
Restructuring Plan	Jun. 30, 2024
Restructuring and Related Activities [Abstract]
Restructuring Plan	Restructuring Plan Restructuring Plan On May 23, 2023, the Board of Directors approved the Company’s May 2023 Restructuring Plan which includes site consolidations, facilities moves and closures, as well as the relocation and requalification of certain manufacturing facilities. These restructuring actions are expected to be accompanied by other cost reductions and are intended to realign our cost structure as part of a transformation to a simpler, more streamlined, resilient and sustainable business model. We evaluate restructuring charges in accordance with ASC 420, Exit or Disposal Cost Obligations, and ASC 712, Compensation-Nonretirement Post-Employment Benefits (ASC 712). In fiscal 2024, these activities resulted in $27 million of charges primarily for acceleration of depreciation, write-off of property and equipment, and site move costs. In fiscal 2023, these activities resulted in $119 million of charges primarily for employee termination and the write-off of property and equipment, net of $65 million from reimbursement arrangements. We expect the restructuring actions to be substantially completed by the end of fiscal 2025; however, the actual timing and costs associated with these restructuring actions may differ from our current expectations and estimates and such differences may be material. Activity and accrual balances for the Restructuring Plan were as follows ($000): Severance Asset Write-Offs Other Total Accrual Balance - June 30, 2022 $ — $ — $ — $ — Restructuring charges 76,944 107,157 — 184,101 Reimbursement arrangements (9,247) (55,753) — (65,000) Reimbursement arrangement related accrual 9,247 — — 9,247 Payments (12,565) — — (12,565) Asset write-offs and other — (51,404) — (51,404) Balance - June 30, 2023 $ 64,379 $ — $ — $ 64,379 Restructuring charges (recoveries) (129) 11,658 15,527 27,056 Payments (13,189) — — (13,189) Asset write-offs and other — (11,658) (15,527) (27,185) Balance - June 30, 2024 $ 51,061 $ — $ — $ 51,061 At June 30, 2024, $15 million and $37 million of accrued severance related costs were included in other accrued liabilities and other liabilities on our Consolidated Balance Sheet, respectively, and are expected to result in cash expenditures through fiscal 2028. The current year severance related recoveries are primarily comprised of adjustments to accruals for severance pay for employees being terminated due to the consolidation of certain manufacturing sites, with severance recorded in accordance with ASC 712. The current year asset write-offs are primarily comprised of specifically identified equipment write-offs due to the consolidation of certain manufacturing sites. The fiscal 2023 severance related costs are primarily comprised of severance pay for employees being terminated due to the consolidation of certain manufacturing sites, with severance recorded in accordance with ASC 712. The fiscal 2023 asset write-offs are primarily comprised of specifically identified equipment write-offs due to the consolidation of certain manufacturing sites. At June 30, 2023, a $50 million receivable under a reimbursement arrangement was recorded in Prepaid and other current assets; the receivable was received during fiscal 2024. By segment in fiscal 2024, $(4) million, $28 million and $4 million of restructuring costs (recoveries) were incurred in the Networking, Materials and Lasers segments, respectively. By segment in fiscal 2023, $56 million, $60 million and $3 million of restructuring costs were incurred in the Networking, Materials and Lasers segments, respectively. Restructuring charges are recorded in Restructuring charges in our Consolidated Statements of Earnings (Loss).

SCHEDULE II

SCHEDULE II	12 Months Ended
SCHEDULE II	Jun. 30, 2024
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]
SCHEDULE II	SCHEDULE II COHERENT CORP. AND SUBSIDIARIES VALUATION AND QUALIFYING ACCOUNTS YEARS ENDED JUNE 30, 2024, 2023, AND 2022 (IN THOUSANDS OF DOLLARS) Balance at Charged Charged Deduction Balance YEAR ENDED JUNE 30, 2024: Allowance for doubtful accounts $ 8,005 $ 5,161 $ — $ (3,655) (3) $ 9,511 Warranty reserves $ 47,563 $ 34,362 $ — $ (37,732) $ 44,193 Deferred tax asset valuation allowance $ 97,180 $ 57,968 $ (318) (2) $ — $ 154,830 YEAR ENDED JUNE 30, 2023: Allowance for doubtful accounts $ 4,206 $ 1,793 $ 3,112 (1) $ (1,106) (3) $ 8,005 Warranty reserves $ 17,738 $ 40,475 $ 29,196 (1) $ (39,846) $ 47,563 Deferred tax asset valuation allowance $ 55,420 $ 4,035 $ 37,725 (1,2) $ — $ 97,180 YEAR ENDED JUNE 30, 2022: Allowance for doubtful accounts $ 924 $ 3,292 $ — $ (10) (3) $ 4,206 Warranty reserves $ 21,868 $ 7,718 $ — $ (11,848) $ 17,738 Deferred tax asset valuation allowance $ 53,765 $ 2,157 $ (502) (2) $ — $ 55,420 (1) Related to amounts assumed from the Coherent, Inc. acquisition. (2) Primarily related to currency translation adjustments. (3) Primarily relates to write-offs of accounts receivable.

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Thousands	12 Months Ended
Pay vs Performance Disclosure - USD ($) $ in Thousands	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022
Pay vs Performance Disclosure
Net earnings (loss) attributable to Coherent Corp.	$ (156,154)	$ (259,458)	$ 234,759

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended
Insider Trading Arrangements	Jun. 30, 2024
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

Insider Trading Policies and Pr

Insider Trading Policies and Procedures	12 Months Ended
Insider Trading Policies and Procedures	Jun. 30, 2024
Insider Trading Policies and Procedures [Line Items]
Insider Trading Policies and Procedures Adopted	true

Nature of Business and Summar_2

Nature of Business and Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Jun. 30, 2024
Accounting Policies [Abstract]
Consolidation	Consolidation.
Use of Estimates	Use of Estimates. The preparation of financial statements in conformity with generally accepted accounting principles in the United States (“U.S. GAAP”) requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Although these estimates are based on management’s best knowledge of current events and actions Coherent may undertake in the future, actual results may ultimately differ from the estimates.
Foreign Currency Translation	Foreign Currency Translation. For all foreign subsidiaries whose functional currency is not the U.S. dollar, the functional currency is the local currency. Assets and liabilities of those operations are translated into U.S. dollars using period-end exchange rates while income and expenses are translated using the average exchange rates for the reporting period. Translation adjustments are recorded as Accumulated other comprehensive income (loss) within Shareholders’ equity in the accompanying Consolidated Balance Sheets.
Cash, Cash Equivalents and Restricted Cash	Cash, Cash Equivalents, and Restricted Cash.
Allowance for Expected Credit Losses	Allowance for Expected Credit Losses.
Inventories	Inventories. Inventories are valued at the lower of cost or net realizable value, with cost determined on the first-in, first-out basis. Inventory costs include material, labor and manufacturing overhead. In evaluating the net realizable value of inventory, management also considers other factors, including known trends and market conditions. We generally record a reduction to the carrying value of inventory as a charge against earnings for all products on hand more than 12 to 24 months, depending on the nature of the products that have not been sold to customers or cannot be further manufactured for sale to alternative customers. An additional charge may be recorded for product on hand that is in excess of product sold to customers over the same periods noted above.
Property, Plant and Equipment	Property, Plant and Equipment. Property, plant and equipment are carried at cost or fair value upon acquisition. Major improvements are capitalized, while maintenance and repairs are generally expensed as incurred. We review our property, plant and equipment and other long-lived assets for impairment whenever events or circumstances indicate that the carrying amounts may not be recoverable. Depreciation on property, plant and equipment and amortization on finance lease right-of-use assets for financial reporting purposes is computed primarily by the straight-line method over the estimated useful lives for building, building improvements and land improvements of 10 to 40 years and 3 to 20 years for machinery and equipment.
Leases	Leases.
Business Combinations	Business Combinations. The Company accounts for business combinations by establishing the acquisition-date fair value as the measurement for all assets acquired and liabilities assumed. Certain provisions of U.S. GAAP prescribe, among other things, the determination of acquisition-date fair value of consideration paid in a business combination (including contingent consideration) and the exclusion of transaction and acquisition-related restructuring costs from acquisition accounting.
Goodwill	Goodwill. The excess purchase price over the fair value allocated to identifiable tangible and intangible net assets of businesses acquired is reported as goodwill in the accompanying Consolidated Balance Sheets. We test goodwill for impairment at least annually as of April 1, or when events or changes in circumstances indicate that goodwill might be impaired. The evaluation of impairment involves comparing the current fair value of our reporting units to the recorded value (including goodwill). We use a discounted cash flow (“DCF”) model and/or a market analysis to determine the fair value of our reporting units. A number of assumptions and estimates are involved in estimating the forecasted cash flows used in the DCF model, including markets and market shares, sales volume and pricing, costs to produce, working capital changes and income tax rates. Management considers historical experience and all available information at the time the fair values of the reporting units are estimated. Goodwill impairment is measured as the amount by which a reporting unit’s carrying value exceeds its fair value, not to exceed the carrying amount of goodwill. We have the option to perform a qualitative assessment of goodwill prior to completing the quantitative assessment described above to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount, including goodwill and other intangible assets. If we conclude that this is the case, we must perform the quantitative assessment. Otherwise, we will forego the quantitative assessment and do not need to perform any further testing. As of April 1 of fiscal years 2024 and 2023, we completed our annual impairment tests of our reporting units using the quantitative assessment. For fiscal year 2024, the fair values of the reporting units were determined using a discounted cash flow analysis with projected financial information based on our most recently completed long-term strategic planning processes and also considered the current financial performance compared to our prior projections of the reporting units, as well as a market analysis. As of April 1, 2024, the fair value of each of our reporting units exceeded their carrying values.
Intangibles	Intangibles.
Series A Mandatory Convertible Preferred Stock and Series B Convertible Preferred Stock	Series A Mandatory Convertible Preferred Stock . The Mandatory Convertible Preferred Stock was initially measured at fair value, less underwriting discounts and commissions and offering expenses paid by the Company. The Preferred Stock’s dividends were cumulative, at 6% per annum. All outstanding shares of Mandatory Convertible Preferred Stock were converted to 10,240,290 shares of Company Common Stock on July 3, 2023, at a conversion ratio of 4.4523, and no shares of Mandatory Convertible Preferred Stock are currently issued and outstanding. See Note 10. Equity and Redeemable Preferred Stock for further information. Series B Convertible Preferred Stock.
Noncontrolling Interests	Noncontrolling Interests.
Commitments and Contingencies	Commitments and Contingencies.
Income Taxes	Income Taxes. Deferred income tax assets and liabilities are determined based on the differences between the Consolidated Financial Statements and tax basis of assets and liabilities using enacted tax rates in effect in the years in which the differences are expected to reverse. Valuation allowances are established when necessary to reduce deferred income tax assets to the amount more likely than not to be realized. The Company’s accounting policy is to apply acquired deferred tax liabilities to pre-existing deferred tax assets before evaluating the need for a valuation allowance for acquired deferred tax assets. The Company recognizes the tax benefit from an uncertain tax position only if it is more likely than not that the tax position will be sustained on examination by the taxing authorities, based on the technical merits of the position. The tax benefits recognized in the financial statements from such a position are measured based on the largest benefit that has a greater than 50% likelihood of being realized upon ultimate resolution. The amount of unrecognized tax benefits is adjusted for changes in facts and circumstances. For example, adjustments could result from significant amendments to existing tax law and the issuance of regulations or interpretations by the taxing authorities, new information obtained during a tax examination, or resolution of an examination. The Company believes that its estimates for uncertain tax positions are appropriate and sufficient to pay assessments that may result from examinations of its tax returns. The Company recognizes both accrued interest and penalties related to unrecognized tax benefits in income tax expense.
Revenue Recognition	Revenue Recognition. Revenue is recognized under Accounting Standards Codification 606, Revenue from Contracts with Customers (ASC 606), when or as obligations under the terms of a contract with our customer have been satisfied and control has transferred to the customer. We have elected the practical expedient to exclude all taxes from the measurement of the transaction price. For contracts with commercial customers, which comprise the majority of our performance obligations, ownership of the goods and associated revenue are generally transferred to customers at a point in time, generally upon shipment of a product to the customer or delivery of the product to the customer and without significant judgments. The majority of contracts typically require payment within 30 to 90 days after transfer of ownership to the customer. We periodically enter into contracts in which a customer may purchase a combination of goods and/or services, such as products with maintenance contracts or extended warranty. Maintenance contracts and extended warranties are sold separately from products, and represent a distinct performance obligation. Revenue related to the performance obligation for maintenance contracts and extended warranties is recognized over time as the customer simultaneously receives and consumes the benefits provided by us. Service revenue includes repairs, tolling arrangements and installation. Repairs, tolling and installation activities are usually completed in a short period of time (normally less than one month) and therefore recorded at a point in time when the services are completed. The majority of contracts typically require payment within 30 to 90 days after performance of the service. Non-recurring engineering arrangements are typically recognized as product revenue over time under either the time and material practical expedient, as the entity has a right to consideration from a customer, in an amount that corresponds directly with the value to the customer of the entity’s performance completed to date, or under the output and input method. The majority of contracts typically require payment within 30 to 90 days. Our revenue recognition policy is consistently applied across our segments, product lines, services, and geographical locations. For the periods covered herein, we measure revenue based on the amount of consideration it expects to be entitled to in exchange for products or services, reduced by the amount of variable consideration related to products expected to be returned. We determine variable consideration, which primarily consists of product returns and distributor sales price reductions resulting from price protection agreements, by estimating the impact of such reductions based on historical analysis of such activity. Under ASC 606, we expense sales commissions when incurred because the amortization period would have been one year or less. These costs are recorded within selling, general and administrative expenses (“SG&A”). Costs for freight and shipping are generally recorded in cost of goods sold when control over products has transferred to the customer. We offer an assurance-type limited warranty that products will be free from defects in materials and workmanship. We establish an accrual for estimated warranty expenses at the time revenue is recognized. The warranty is typically one year, although can be longer periods for certain products, and is typically limited to either (1) the replacement or repair of the product or (2) a credit against future purchases. We believe that disaggregating revenue by end market provides the most relevant information regarding the nature, amount, timing, and uncertainty of revenues and cash flows. See Note 4. Revenue from Contracts with Customers for further information.
Internal Research and Development	Internal Research and Development . Internal research and development (“IR&D”) expenses include salaries, contractor and consultant fees, supplies and materials, as well as costs related to other overhead such as depreciation, facilities, utilities and other departmental expenses. The costs we incur with respect to internally developed technology, including allocations of our wafer fabrication and other manufacturing facilities and resources utilized to support R&D programs, are included in IR&D expenses as incurred.
Share-Based Compensation	Share-Based Compensation. Share-based compensation arrangements require the recognition in net earnings (loss) of the grant date fair value of share-based compensation (for equity-classified awards). We recognize the share-based compensation expense over the requisite service period of the individual grantees, which generally equals the vesting period, net of forfeitures. The estimated annualized forfeitures are based on our historical experience of pre-vesting cancellations. We will record additional expense in future periods if the actual forfeiture rate is lower than estimated, and will adjust expense in future periods if the actual forfeitures are higher than estimated. See Note 14. Share-Based Compensation for a description of our share-based compensation plans and the assumptions we use to calculate the fair value of share-based compensation.
Earnings per Share	Earnings per Share.
Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss). Accumulated other comprehensive income (loss) is a measure of all changes in shareholders’ equity that result from transactions and other economic events in the period other than transactions with owners. Accumulated other comprehensive income (loss) is a component of shareholders’ equity and consists of accumulated foreign currency translation adjustments, changes in the fair value of interest rate swap and cap derivative instruments, and pension adjustments.
Fair Value Measurements	Fair Value Measurements. We apply fair value accounting for all financial assets and liabilities that are required to be recognized or disclosed at fair value in the Consolidated Financial Statements. Fair value is defined as the price that would be received from selling an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. When determining the fair value measurements for assets and liabilities, we consider the principal or most advantageous market in which we would transact, and the market-based risk measurements or assumptions that market participants would use in pricing the asset or liability, such as inherent risk, transfer restrictions and credit risk.
Recently Issued Financial Accounting Standards	SEC Final Rule: Cybersecurity Risk Management, Strategy, Governance, and Incident Disclosure In July 2023, the U.S. Securities and Exchange Commission (the “SEC”) adopted the final rule under SEC Release No. 33-11216, Cybersecurity Risk Management, Strategy, Governance, and Incident Disclosure, requiring current reporting about material cybersecurity incidents and annual disclosures on management’s processes for assessing, identifying, and managing material cybersecurity risks, the material impacts of cybersecurity threats and previous cybersecurity incidents, the Board of Directors’ (the “Board”) oversight of cybersecurity risks, and management’s role and expertise in assessing and managing material cybersecurity risks. SEC Release No. 33-11216 did not have a material impact on the Company’s consolidated financial statements and disclosures. Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures In November 2023, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2023-07 - Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures. This ASU improves reportable segment disclosure requirements, primarily through enhanced disclosures about significant segment expenses. This ASU is effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024. Early adoption is permitted. The Company is evaluating the impact this will have on the Company’s consolidated financial statements and disclosures. Income Taxes (Topic 740): Improvements to Income Tax Disclosures In December 2023, the FASB issued ASU 2023-09, “Income Taxes (Topic 740): Improvements to Income Tax Disclosures” (“ASU 2023-09”). ASU 2023-09 includes amendments that further enhance income tax disclosures, primarily through standardization and disaggregation of rate reconciliation categories and income taxes paid by jurisdiction. ASU 2023-09 is effective for annual periods beginning after December 15, 2024, on either a prospective or retrospective basis. Early adoption is permitted. The Company is currently evaluating the impact of ASU 2023-09 on its consolidated financial statements and related disclosures. SEC Final Rule: The Enhancement and Standardization of Climate-Related Disclosures for Investors In March 2024, the SEC issued the final rule under SEC Release No. 33-11275 and 34-99678, “The Enhancement and Standardization of Climate-Related Disclosures for Investors,” requiring public companies to provide certain climate-related information in their registration statements and annual reports. The final rules will require information about a company’s climate-related risks that have materially impacted or are reasonably likely to have a material impact on its business strategy, results of operations, or financial condition, and the actual and potential material impacts of any identified climate-related risks on the company’s strategy, business model and outlook, as well as relating to assessment, management, oversight and mitigation of such material risks, material climate-related targets and goals, and material greenhouse gas emissions. Additionally, certain disclosures related to severe weather events and other natural conditions will be required in the audited financial statements. The first phase of the final rule is effective for fiscal years beginning in 2025. Disclosure for prior periods is only required if it was previously disclosed in an SEC filing. On April 4, 2024, the SEC voluntarily stayed implementation of the final rule to facilitate the orderly judicial resolution of pending legal challenges to the rule. We are currently evaluating the impact on our disclosures of adopting this new pronouncement. Supplier Finance Program Obligations (Subtopic 405-50): Disclosure of Supplier Financing Program Obligations In September 2022, the FASB issued ASU No. 2022-04, requiring enhanced disclosures related to supplier financing programs. The ASU requires disclosure of the key terms of the program and a rollforward of the related obligation during the annual period, including the amount of obligations confirmed and obligations subsequently paid. The Company adopted this ASU as of July 1, 2023, other than the roll-forward disclosure requirement, which the Company will adopt in fiscal 2025. The adoption did not have a material impact on the Company's financial statements and related disclosures.

Coherent Acquisition (Tables)

Coherent Acquisition (Tables)	12 Months Ended
Coherent Acquisition (Tables)	Jun. 30, 2024
Business Combination, Asset Acquisition, and Joint Venture Formation [Abstract]
Schedule of Fair Value of Consideration Paid in Acquisition	The total fair value of consideration paid in connection with the acquisition of Coherent, Inc. consisted of the following (in $000): Shares Per Share Total Consideration Cash paid for merger consideration — — $ 5,460,808 Shares of COHR common stock issued to Coherent, Inc. stockholders 22,587,885 $49.83 1,125,554 Converted Coherent, Inc. RSUs attributable to pre-combination service — — 82,037 Payment of Coherent, Inc. debt — — 364,544 Payment of Coherent, Inc. transaction expenses — — 62,840 $ 7,095,783
Schedule of Allocation of Purchase Price of Assets Acquired and Liabilities Assumed	Our final allocation of the purchase price of Coherent, Inc., based on the estimated fair value of the assets acquired and liabilities assumed as of the Closing Date, is as follows (in $000): Final Purchase Price Allocation, As Adjusted Assets Current Assets Cash, cash equivalents, and restricted cash $ 393,324 Accounts receivable 270,928 Inventories (i) 562,884 Prepaid and refundable income taxes 4,832 Prepaid and other current assets 37,805 Total Current Assets 1,269,773 Property, plant & equipment, net (ii) 440,932 Deferred income taxes 236 Other assets 106,388 Other intangible assets, net (iii) 3,505,000 Goodwill 3,174,984 Total Assets $ 8,497,313 Liabilities Current Liabilities Current portion of long-term debt $ 4,504 Accounts payable 116,754 Accrued compensation and benefits 58,631 Operating lease current liabilities 13,002 Accrued income taxes payable 25,052 Other accrued liabilities 138,924 Total Current Liabilities 356,867 Long-term debt 22,991 Deferred income taxes 877,598 Operating lease liabilities 43,313 Other liabilities 100,761 Total Liabilities $ 1,401,530 Final aggregate acquisition consideration $ 7,095,783 (i) The Consolidated Balance Sheet has been adjusted to record Coherent Inc.’s inventories at a fair value of approximately $563 million. The Consolidated Statement of Earnings (Loss) for the year ended June 30, 2023 includes cost of goods sold of approximately $158 million related to the increased basis in the fair value compared to the carrying value. The costs were amortized over the expected period during which the acquired inventory was sold and thus did not affect the Consolidated Statements of Earnings (Loss) beyond twelve months after the Closing Date. (ii) The Consolidated Balance Sheet has been adjusted to record Coherent Inc.’s property, plant and equipment (consisting of land, buildings and improvements, equipment, furniture and fixtures, and leasehold improvements) at a fair value of approximately $441 million. The Consolidated Statements of Earnings (Loss) have been adjusted to recognize additional depreciation expense related to the increased basis. The additional depreciation expense is computed with the assumption that the various categories of assets will be depreciated over their remaining useful lives on a straight-line basis. (iii) Identifiable intangible assets consist of the following and are being amortized over their estimated useful lives in the Consolidated Statements of Earnings (Loss) (in $000): Fair Value Estimated Useful Life Trade names and trademarks $ 430,000 N/A Customer relationships $ 1,830,000 15.0 years Developed technology $ 1,157,500 13.5 years Backlog $ 87,500 1.0 year Intangible assets acquired $ 3,505,000
Schedule of Unaudited Supplemental Pro Forma Financial Information	The unaudited supplemental pro forma financial information for the periods presented is as follows (in $000): Year Ended June 30, 2023 Year Ended June 30, 2022 Revenue $ 5,160,100 $ 4,837,103 Net Earnings (Loss) 105,849 (289,615)

Revenue from Contracts with C_2

Revenue from Contracts with Customers (Tables)	12 Months Ended
Revenue from Contracts with Customers (Tables)	Jun. 30, 2024
Revenue from Contract with Customer [Abstract]
Schedule of Disaggregated Revenue	The following table summarizes disaggregated revenue by market ($000): Year Ended June 30, 2024 Networking Materials Lasers Total Industrial $ 63,905 $ 546,003 $ 1,070,268 $ 1,680,176 Communications 2,192,286 81,475 — 2,273,761 Electronics 6,655 349,250 — 355,905 Instrumentation 32,883 39,845 325,118 397,846 Total Revenues $ 2,295,729 $ 1,016,573 $ 1,395,386 $ 4,707,688 Year Ended June 30, 2023 Networking Materials Lasers Total Industrial $ 70,076 $ 603,664 $ 1,087,881 $ 1,761,621 Communications 2,219,677 73,703 — 2,293,380 Electronics 11,488 614,151 — 625,639 Instrumentation 39,689 58,240 381,531 479,460 Total Revenues $ 2,340,930 $ 1,349,758 $ 1,469,412 $ 5,160,100 Year Ended June 30, 2022 Networking Materials Lasers Total Industrial $ 84,032 $ 662,731 $ — $ 746,763 Communications 2,064,424 90,406 — 2,154,830 Electronics 12,218 298,156 — 310,374 Instrumentation 36,575 68,074 — 104,649 Total Revenues $ 2,197,249 $ 1,119,367 $ — $ 3,316,616

Inventories (Tables)

Inventories (Tables)	12 Months Ended
Inventories (Tables)	Jun. 30, 2024
Inventory Disclosure [Abstract]
Schedule of Components of Inventories	The components of inventories were as follows ($000): June 30, 2024 2023 Raw materials $ 429,888 $ 462,436 Work in progress 620,575 549,992 Finished goods 235,941 259,905 Total Inventories $ 1,286,404 $ 1,272,333

Property, Plant & Equipment (Ta

Property, Plant & Equipment (Tables)	12 Months Ended
Property, Plant & Equipment (Tables)	Jun. 30, 2024
Property, Plant and Equipment [Abstract]
Schedule of Property, Plant & Equipment	Property, plant & equipment consists of the following ($000): June 30, 2024 2023 Land and land improvements $ 66,156 $ 69,639 Buildings and improvements 774,991 780,204 Machinery and equipment 2,034,310 1,879,136 Construction in progress 398,884 287,990 Finance lease right-of-use asset 25,000 25,000 3,299,341 3,041,969 Less accumulated depreciation (1,482,082) (1,259,934) Property, plant, and equipment, net $ 1,817,259 $ 1,782,035

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets (Tables)	12 Months Ended
Goodwill and Other Intangible Assets (Tables)	Jun. 30, 2024
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Carrying Amount of Goodwill	Changes in the carrying amount of goodwill were as follows ($000): Year Ended June 30, 2024 Networking Materials Lasers Total Balance at beginning of period $ 1,036,204 $ 247,695 $ 3,228,801 $ 4,512,700 Foreign currency translation and other 388 (1,712) (47,047) (48,371) Balance-end of period $ 1,036,592 $ 245,983 $ 3,181,754 $ 4,464,329 Year Ended June 30, 2023 Networking Materials Lasers Total Balance-beginning of period $ 1,013,277 $ 272,482 $ — $ 1,285,759 Goodwill acquired — — 3,174,984 3,174,984 Foreign currency translation and other 22,927 (24,787) 53,817 51,957 Balance-end of period $ 1,036,204 $ 247,695 $ 3,228,801 $ 4,512,700
Schedule of Gross Carrying Amount and Accumulated Amortization of Intangible Assets Other Than Goodwill	The gross carrying amount and accumulated amortization of our intangible assets other than goodwill as of June 30, 2024 and 2023 were as follows ($000): June 30, 2024 June 30, 2023 Gross Accumulated Net Gross Accumulated Net Technology $ 1,653,289 $ (394,040) $ 1,259,249 $ 1,661,263 $ (270,786) $ 1,390,477 Trade Names 438,470 (8,470) 430,000 438,470 (8,279) 430,191 Customer Lists 2,310,550 (498,252) 1,812,298 2,333,360 (339,344) 1,994,016 Backlog and Other 88,792 (87,092) 1,700 88,834 (88,834) — Total $ 4,491,101 $ (987,854) $ 3,503,247 $ 4,521,927 $ (707,243) $ 3,814,684
Schedule of Estimated Amortization Expense for Existing Intangible Assets	The estimated amortization expense for existing intangible assets for each of the five succeeding years is as follows ($000): Year Ending June 30, 2025 $ 270,150 2026 269,041 2027 267,928 2028 266,238 2029 260,394

Debt (Tables)

Debt (Tables)	12 Months Ended
Debt (Tables)	Jun. 30, 2024
Debt Disclosure [Abstract]
Schedule of Components of Debt	The components of debt were as follows ($000): June 30, 2024 June 30, 2023 Term A Facility, interest at adjusted SOFR, as defined, plus 2.000% $ 775,625 $ 818,125 Revolving New Credit Facility, interest at LIBOR, as defined, plus 2.000% — — Debt issuance costs, Term A Facility and Revolving Credit Facility (13,586) (18,149) Term B Facility, interest at adjusted SOFR, as defined, plus 2.50% 2,384,536 2,566,625 Debt issuance costs, Term B Facility (49,835) (63,977) 5.00% Senior Notes 990,000 990,000 Debt Issuance costs, Senior Notes (5,939) (6,863) 1.3% Term loan 335 1,697 Facility construction loan in Germany 19,082 22,340 Total debt 4,100,218 4,309,798 Current portion of long-term debt (73,770) (74,836) Long-term debt, less current portion $ 4,026,448 $ 4,234,962
Schedule of Principal Repayments for Indebtedness	The required annual principal repayments for all indebtedness for the next five years and thereafter, as of June 30, 2024, is set forth in the following table ($000): Year Ending June 30, 2025 $ 70,126 2026 85,730 2027 91,042 2028 638,230 2029 27,292 Thereafter 3,257,157 Total $ 4,169,577

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
Income Taxes (Tables)	Jun. 30, 2024
Income Tax Disclosure [Abstract]
Schedule of Components of Earnings (Losses) Before Income Taxes	The components of earnings (loss) before income taxes by jurisdiction were as follows ($000): Year Ended June 30, 2024 2023 2022 U.S. loss $ (540,048) $ (450,370) $ (62,721) Non-U.S. income 392,401 94,812 344,528 Earnings (loss) before income taxes $ (147,647) $ (355,558) $ 281,807
Schedule of Components of Income Tax Expense (Benefit)	The components of the income tax expense (benefit) were as follows ($000): Year Ended June 30, 2024 2023 2022 Current: Federal $ 10,119 $ 5 $ 1,569 State 181 3,867 768 Foreign 103,640 106,850 52,865 Total Current 113,940 110,722 55,202 Deferred: Federal (68,955) (106,044) (7,185) State (186) (7,151) (1,215) Foreign (33,682) (93,627) 246 Total Deferred (102,823) (206,822) (8,154) Total Income Tax Expense (Benefit) $ 11,117 $ (96,100) $ 47,048
Schedule of Principal Items Comprising Deferred Income Tax Assets and Liabilities	Principal items comprising deferred tax assets and liabilities were as follows ($000): June 30, 2024 2023 Deferred income tax assets Inventory capitalization $ 62,242 $ 60,232 Non-deductible accruals 16,770 18,423 Accrued employee benefits 38,460 40,292 Net-operating loss and credit carryforwards 268,735 234,546 Share-based compensation expense 15,947 16,729 Other 1,346 9,256 Research and development capitalization 128,291 85,473 Deferred revenue 14,839 11,415 Right of use asset 47,712 42,688 Valuation allowances (154,830) (97,180) Total deferred income tax assets 439,512 421,874 Deferred income tax liabilities Tax over book accumulated depreciation (29,065) (56,742) Intangible assets (905,435) (988,580) Interest rate swap (4,104) (8,522) Interest rate cap (11,465) (10,734) Tax on unremitted earnings (61,719) (51,672) Outside basis differences (122,423) — Lease liability (46,198) (41,426) Other (2,511) (6,757) Total deferred income tax liabilities (1,182,920) (1,164,433) Net deferred income taxes $ (743,408) $ (742,559)
Schedule of Reconciliation of Income Tax Expense	The reconciliation of income tax expense at the statutory U.S. federal rate to the reported income tax expense (benefit) is as follows ($000): Year Ended June 30, 2024 % 2023 % 2022 % Taxes at statutory rate $ (31,006) 21 $ (74,667) 21 $ 59,179 21 Increase (decrease) in taxes resulting from: State income taxes-net of federal benefit (22) — (2,548) 1 (339) — Taxes on non U.S. earnings 16,601 (11) 191 — (2,704) (1) Valuation allowance 43,866 (30) 3,836 (1) (1,513) (1) U.S. Branch Income 3,226 (2) 2,037 (1) 1,230 1 Noncontrolling interest 1,002 (1) — — — — Research and manufacturing incentive deductions and credits (41,387) 28 (29,416) 8 (24,341) (9) Stock compensation 13,294 (9) 18,661 (5) 2,095 1 GILTI and FDII (629) — (7,195) 2 4,866 2 Other 6,172 (4) (6,999) 2 8,575 3 $ 11,117 (8) $ (96,100) 27 $ 47,048 17
Schedule of Gross Operating Loss Carryforwards and Tax Credit Carryforwards	The Company has the following gross operating loss carryforwards and tax credit carryforwards as of June 30, 2024 ($000): Type Amount Expiration Date Tax credit carryforwards: Federal research and development credits $ 138,723 June 2029-June 2044 Foreign tax credits — State tax credits 21,420 June 2025-June 2039 State tax credits (indefinite) 79,179 Indefinite Operating loss carryforwards: Loss carryforwards - federal $ 36,014 June 2025-June 2036 Loss carryforwards - federal (indefinite) 1,968 Indefinite Loss carryforwards - state 324,702 June 2025-June 2044 Loss carryforwards - state (indefinite) 36,719 Indefinite Loss carryforwards - foreign 70,666 June 2025-June 2033 Loss carryforwards - foreign (indefinite) 152,336 Indefinite
Schedule of Changes in Liability for Unrecognized Tax Benefits	Changes in the liability for unrecognized tax benefits for the fiscal years ended June 30, 2024, 2023 and 2022 were as follows ($000): Year Ended June 30, 2024 2023 2022 Beginning balance $ 115,180 $ 37,411 $ 38,025 Increases in current year tax positions 5,168 110 1,803 Acquired business — 86,077 — Settlements (2,970) — — Expiration of statute of limitations (681) (8,418) (2,417) Ending balance $ 116,697 $ 115,180 $ 37,411

Equity and Redeemable Preferr_2

Equity and Redeemable Preferred Stock (Tables)	12 Months Ended
Equity and Redeemable Preferred Stock (Tables)	Jun. 30, 2024
Equity [Abstract]
Schedule of Dividends	The following table presents dividends per share and dividends recognized: Year Ended June 30, 2024 Year Ended June 30, 2023 Dividends per share $ — $ 12 Series A Mandatory Convertible Preferred Stock dividends ($000) — 27,600 The following table presents dividends per share and dividends recognized for the years ended June 30, 2024, and June 30, 2023: Year Ended June 30, 2024 Year Ended June 30, 2023 Dividends per share $ 574 $ 542 Dividends ($000) 117,894 111,785 Deemed dividends ($000) 5,463 4,827

Earnings Per Share (Tables)

Earnings Per Share (Tables)	12 Months Ended
Earnings Per Share (Tables)	Jun. 30, 2024
Earnings Per Share [Abstract]
Schedule of Reconciliation of Basic and Diluted Earnings (Loss) Per Share	The following is a reconciliation of the numerators and denominators of the basic and diluted earnings (loss) per share computations for the periods presented ($000, except per share): Year Ended June 30, 2024 2023 2022 Numerator Net earnings (loss) attributable to Coherent Corp. $ (156,154) $ (259,458) $ 234,759 Deduct Series A preferred stock dividends — (27,600) (27,600) Deduct Series B dividends and deemed dividends (123,357) (116,612) (40,625) Basic earnings (loss) available to the common shareholders $ (279,511) $ (403,670) $ 166,534 Effect of dilutive securities: Add back interest on Convertible Notes (net of tax) $ — $ — $ 2,229 Diluted earnings (loss) available to the common shareholders $ (279,511) $ (403,670) $ 168,763 Denominator Weighted average shares 151,642 137,578 106,189 Effect of dilutive securities Common stock equivalents — — 3,012 Convertible Notes — — 7,312 Diluted weighted average common shares 151,642 137,578 116,513 Basic earnings (loss) per common share $ (1.84) $ (2.93) $ 1.57 Diluted earnings (loss) per common share $ (1.84) $ (2.93) $ 1.45
Schedule of Potential Shares Excluded from Calculation of Diluted Net Earnings (Loss) Per Share	The following table presents potential shares of common stock excluded from the calculation of diluted net earnings (loss) per share, as their effect would have been antidilutive (in thousands of shares): Year Ended June 30, 2024 2023 2022 Series A Mandatory Convertible Preferred Stock — 10,423 8,915 Series B Convertible Preferred Stock 27,691 26,349 9,162 Common stock equivalents 2,940 2,271 9,611 Total anti-dilutive shares 30,631 39,043 27,688

Noncontrolling Interests (Table

Noncontrolling Interests (Tables)	12 Months Ended
Noncontrolling Interests (Tables)	Jun. 30, 2024
Noncontrolling Interest [Abstract]
Schedule of Noncontrolling Interests	The following table presents the activity in noncontrolling interests in Silicon Carbide ($000): Year Ended June 30, 2024 Beginning balance $ — Sale of shares to noncontrolling interests 373,573 Share of foreign currency translation adjustments 429 Net loss (2,610) Ending balance $ 371,392

Leases (Tables)

Leases (Tables)	12 Months Ended
Leases (Tables)	Jun. 30, 2024
Leases [Abstract]
Schedule of Lease Costs	The following table presents lease costs, which include leases for arrangements with an initial term of more than 12 months, lease term, and discount rates ($000): Year Ended June 30, 2024 2023 2022 Finance Lease Cost Amortization of right-of-use assets $ 1,667 $ 1,667 $ 1,671 Interest on lease liabilities 1,040 1,124 1,200 Total finance lease cost 2,707 2,791 2,871 Operating lease cost 52,909 53,127 36,716 Sublease income — — 507 Total lease cost $ 55,616 $ 55,918 $ 39,080 Cash Paid for Amounts Included in the Measurement of Lease Liabilities Operating cash flows from finance leases 1,040 1,124 1,200 Operating cash flows from operating leases 50,672 50,503 35,481 Financing cash flows from finance leases 1,584 1,430 1,290 Assets Obtained in Exchange for Lease Liabilities Right-of-use assets obtained in acquisitions — 56,315 — Right-of-use assets obtained in exchange for new operating lease liabilities 64,385 27,720 18,161 Total assets obtained in exchange for new operating lease liabilities 64,385 84,035 18,161 Weighted-Average Remaining Lease Term (in Years) Finance leases 7.5 8.5 9.5 Operating leases 6.6 6.9 6.6 Weighted-Average Discount Rate Finance leases 5.6 % 5.6 % 5.6 % Operating leases 6.8 % 5.5 % 5.7 %
Schedule of Future Minimum Operating Lease Payments	The following table presents future minimum lease payments, which includes leases for arrangements with an initial term of more than 12 months ($000): Future Years Operating Leases Finance Leases Total Year 1 $ 52,461 $ 2,697 $ 55,158 Year 2 44,876 2,771 47,647 Year 3 34,923 2,847 37,770 Year 4 26,469 2,925 29,394 Year 5 23,833 3,006 26,839 Thereafter 75,033 7,757 82,790 Total minimum lease payments $ 257,595 $ 22,003 $ 279,598 Less: amounts representing interest 54,660 4,120 58,780 Present value of total lease liabilities $ 202,935 $ 17,883 $ 220,818
Schedule of Future Minimum Finance Lease Payments	The following table presents future minimum lease payments, which includes leases for arrangements with an initial term of more than 12 months ($000): Future Years Operating Leases Finance Leases Total Year 1 $ 52,461 $ 2,697 $ 55,158 Year 2 44,876 2,771 47,647 Year 3 34,923 2,847 37,770 Year 4 26,469 2,925 29,394 Year 5 23,833 3,006 26,839 Thereafter 75,033 7,757 82,790 Total minimum lease payments $ 257,595 $ 22,003 $ 279,598 Less: amounts representing interest 54,660 4,120 58,780 Present value of total lease liabilities $ 202,935 $ 17,883 $ 220,818

Share-Based Compensation (Table

Share-Based Compensation (Tables)	12 Months Ended
Share-Based Compensation (Tables)	Jun. 30, 2024
Share-Based Payment Arrangement [Abstract]
Schedule of Share-Based Compensation Expense	Share-based compensation expense for the fiscal years ended June 30, 2024, 2023 and 2022 is as follows ($000): Year Ended June 30, 2024 2023 2022 Stock Options and Cash-Based Stock Appreciation Rights $ 1,149 $ 2,602 $ 3,218 Restricted Share Awards and Cash-Based Restricted Share Unit Awards 92,634 124,212 56,365 Performance Share Awards and Cash-Based Performance Share Unit Awards 21,912 14,998 10,077 Employee Stock Purchase Plan 11,200 7,819 3,443 $ 126,895 $ 149,631 $ 73,103
Schedule of Stock Option and Cash-Based Stock Appreciation Rights	Stock option and cash-based stock appreciation rights activity during the fiscal year ended June 30, 2024 was as follows: Stock Options Cash-Based Stock Appreciation Rights Number of Weighted Average Number of Weighted Average Outstanding - June 30, 2023 2,186,944 $ 30.15 102,890 $ 35.12 Exercised (685,615) $ 24.64 (53,932) $ 34.90 Forfeited and Expired (10,684) $ 39.74 (2,087) $ 32.70 Outstanding - June 30, 2024 1,490,645 $ 32.62 46,871 $ 35.48 Exercisable - June 30, 2024 1,490,645 $ 32.62 46,871 $ 35.48
Schedule of Outstanding and Exercisable Stock Options	Outstanding and exercisable stock options at June 30, 2024 were as follows: Stock Options and Cash-Based Stock Stock Options and Cash-Based Stock Number of Weighted Weighted Number of Weighted Weighted Range of Shares or Contractual Term Exercise Shares or Contractual Term Exercise Exercise Prices Rights (Years) Price Rights (Years) Price $13.34 - $18.07 220,107 1.08 $ 17.68 220,107 1.08 $ 17.68 $18.07 - $24.35 294,425 2.08 $ 21.52 294,425 2.08 $ 21.52 $24.35 - $35.39 300,515 3.57 $ 33.94 300,515 3.57 $ 33.94 $35.39 - $36.90 420,798 5.22 $ 36.45 420,798 5.22 $ 36.45 $36.90 - $49.90 301,671 4.05 $ 48.14 301,671 4.05 $ 48.14 1,537,516 3.47 $ 32.71 1,537,516 3.47 $ 32.71
Schedule of Restricted Share Unit and Cash-Based Restricted Share Unit	Restricted share unit and cash-based restricted share unit activity during the fiscal year ended June 30, 2024, was as follows: Restricted Share Units Cash-Based Restricted Share Units Number of Weighted Average Number of Weighted Average Nonvested - June 30, 2023 3,521,954 $ 53.33 5,975 $ 53.12 Granted 2,740,565 $ 39.95 6,876 $ 38.04 Vested (2,021,002) $ 50.89 (3,062) $ 52.02 Forfeited (173,632) $ 45.94 (805) $ 41.45 Nonvested - June 30, 2024 4,067,885 $ 45.84 8,984 $ 43.00
Schedule of Performance Share Unit	Performance share unit activity relating to the Plan during the year ended June 30, 2024, was as follows: Performance Share Units Number of Units Weighted Average Grant Date Fair Value Nonvested - June 30, 2023 882,637 $ 36.11 Granted 1,244,605 $ 90.71 Vested (86,984) $ 45.12 Forfeited (337,517) $ 44.67 Nonvested - June 30, 2024 1,702,741 $ 73.86

Segment and Geographic Report_2

Segment and Geographic Reporting (Tables)	12 Months Ended
Segment and Geographic Reporting (Tables)	Jun. 30, 2024
Segment Reporting [Abstract]
Schedule of Financial Information by Segment	The following tables summarize selected financial information of our operations by segment ($000): 2024 Networking Materials Lasers Unallocated Total Revenues $ 2,295,729 $ 1,016,573 $ 1,395,386 $ — $ 4,707,688 Inter-segment revenues 45,767 457,623 5,212 (508,602) — Operating income (loss) 178,789 62,876 (145,544) — 96,121 Interest expense — — — — (288,475) Other income (expense), net — — — — 44,707 Income taxes — — — — (11,117) Net loss — — — — (158,764) Net loss attributable to Coherent Corp. — — — — (156,154) Depreciation and amortization 161,499 108,979 289,283 — 559,761 Expenditures for property, plant & equipment 90,950 224,482 31,384 — 346,816 Segment assets 3,543,981 3,502,642 7,442,011 — 14,488,634 Goodwill 1,036,592 245,983 3,181,754 — 4,464,329 2023 Networking Materials Lasers Unallocated Total Revenues $ 2,340,930 $ 1,349,758 $ 1,469,412 $ — $ 5,160,100 Inter-segment revenues 70,120 362,179 1,517 (433,817) — Operating income (loss) 222,365 159,581 (419,066) — (37,120) Interest expense — — — — (286,872) Other income (expense), net — — — — (31,566) Income taxes — — — — 96,100 Net loss attributable to Coherent Corp. — — — — (259,458) Depreciation and amortization 172,339 143,243 366,105 — 681,687 Expenditures for property, plant & equipment 98,192 274,434 63,434 — 436,060 Segment assets 3,316,555 2,561,156 7,833,422 — 13,711,133 Goodwill 1,036,204 247,695 3,228,801 — 4,512,700 2022 Networking Materials Lasers Unallocated Total Revenues $ 2,197,249 $ 1,119,367 $ — $ — $ 3,316,616 Inter-segment revenues 93,660 272,580 — (366,240) — Operating income (loss) 231,563 218,601 — (35,870) 414,294 Interest expense — — — — (121,254) Other income (expense), net — — — — (11,233) Income taxes — — — — (47,048) Net earnings attributable to Coherent Corp. — — — — 234,759 Depreciation and amortization 172,092 114,687 — — 286,779 Expenditures for property, plant & equipment 89,616 224,716 — — 314,332 Segment Assets 4,897,252 2,947,594 — — 7,844,846 Goodwill 1,013,277 272,482 — — 1,285,759
Schedule of Geographic Information by Location	Geographic information for revenues by location of the customer’s headquarters, were as follows ($000): Revenues Year Ended June 30, 2024 2023 2022 North America $ 2,622,569 $ 2,745,891 $ 1,771,385 Europe 714,282 979,911 623,157 China 621,918 577,180 614,393 Japan 340,863 392,479 196,512 Rest of World 408,056 464,639 111,169 Total $ 4,707,688 $ 5,160,100 $ 3,316,616 Major Customers We had one major customer who accounted for 10% of consolidated revenue during fiscal 2024. The customer purchased primarily from our Networking segment. We had another major customer who accounted for 10% of consolidated revenue during fiscal 2023. The customer purchased primarily from our Networking segment. Geographic information for long-lived assets by country, which include property, plant and equipment, net of related depreciation, and certain other long-term assets, were as follows ($000): Long-Lived Assets June 30, 2024 2023 United States $ 1,226,359 $ 1,069,012 Non-United States China 349,195 365,331 Germany 209,593 216,336 United Kingdom 19,153 77,474 Malaysia 87,783 70,424 Switzerland 44,256 47,110 Sweden 44,733 38,981 Korea 17,862 20,869 Vietnam 20,707 17,739 Australia 8,611 8,641 Taiwan 6,705 7,883 Philippines 11,217 7,205 Other 23,166 24,853 Total Non-United States 842,981 902,846 $ 2,069,340 $ 1,971,858

Fair Value of Financial Instr_2

Fair Value of Financial Instruments (Tables)	12 Months Ended
Fair Value of Financial Instruments (Tables)	Jun. 30, 2024
Fair Value Disclosures [Abstract]
Schedule of Fair Value and Carrying Value of Debt Facilities	The fair value and carrying value of the Debt Facilities were as follows at June 30, 2024 ($000): Fair Value Carrying Value Senior Notes $ 938,193 $ 984,061 Term A Facility 777,564 762,039 Term B Facility 2,390,497 2,334,701

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	12 Months Ended
Employee Benefit Plans (Tables)	Jun. 30, 2024
Retirement Benefits [Abstract]
Schedule of Estimated Future Benefit Payments	Estimated future benefit payments under all plans are estimated to be as follows ($000): Year Ending June 30, 2025 $ 9,100 2026 7,800 2027 7,800 2028 8,500 2029 9,500 Next five years 53,000

Other Accrued Liabilities (Tabl

Other Accrued Liabilities (Tables)	12 Months Ended
Other Accrued Liabilities (Tables)	Jun. 30, 2024
Payables and Accruals [Abstract]
Schedule of Other Accrued Liabilities	The components of other accrued liabilities were as follows ($000): June 30, 2024 2023 Contract liabilities $ 62,123 $ 104,477 Warranty reserves 44,193 47,563 Other accrued liabilities 188,390 158,241 $ 294,706 $ 310,281

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Loss) (Tables)	12 Months Ended
Accumulated Other Comprehensive Income (Loss) (Tables)	Jun. 30, 2024
Equity [Abstract]
Schedule of Accumulated Other Comprehensive Income (Loss), Net of Tax	The changes in accumulated other comprehensive income (loss) by component, net of tax, for the years ended June 30, 2024, 2023, and 2022 were as follows ($000): Foreign Interest Interest Defined Total AOCI - June 30, 2021 $ 55,395 $ (31,773) $ — $ (9,355) $ 14,267 Other comprehensive income (loss) before reclassifications (89,967) 29,711 14,306 15,300 (30,650) Amounts reclassified from AOCI — 13,797 — 419 14,216 Net current-period other comprehensive income (loss) (89,967) 43,508 14,306 15,719 (16,434) AOCI - June 30, 2022 $ (34,572) $ 11,735 $ 14,306 $ 6,364 $ (2,167) Other comprehensive income (loss) before reclassifications 87,927 27,050 22,322 (5,326) 131,973 Amounts reclassified from AOCI — (19,301) — (779) (20,080) Net current-period other comprehensive income (loss) 87,927 7,749 22,322 (6,105) 111,893 AOCI - June 30, 2023 $ 53,355 $ 19,484 $ 36,628 $ 259 $ 109,726 Other comprehensive income (loss) before reclassifications (82,318) 9,529 15,420 (6,708) (64,077) Amounts reclassified from AOCI — (32,414) (12,731) (735) (45,880) Net current-period other comprehensive income (loss) (82,318) (22,885) 2,689 (7,443) (109,957) AOCI - Reclass related to sale of shares to noncontrolling interests 2,871 — — — 2,871 AOCI - June 30, 2024 $ (26,092) $ (3,401) $ 39,317 $ (7,184) $ 2,640

Restructuring Plan (Tables)

Restructuring Plan (Tables)	12 Months Ended
Restructuring Plan (Tables)	Jun. 30, 2024
Restructuring and Related Activities [Abstract]
Schedule of Activity and Accrual Balances for the Restructuring Plan	Activity and accrual balances for the Restructuring Plan were as follows ($000): Severance Asset Write-Offs Other Total Accrual Balance - June 30, 2022 $ — $ — $ — $ — Restructuring charges 76,944 107,157 — 184,101 Reimbursement arrangements (9,247) (55,753) — (65,000) Reimbursement arrangement related accrual 9,247 — — 9,247 Payments (12,565) — — (12,565) Asset write-offs and other — (51,404) — (51,404) Balance - June 30, 2023 $ 64,379 $ — $ — $ 64,379 Restructuring charges (recoveries) (129) 11,658 15,527 27,056 Payments (13,189) — — (13,189) Asset write-offs and other — (11,658) (15,527) (27,185) Balance - June 30, 2024 $ 51,061 $ — $ — $ 51,061

Nature of Business and Summar_3

Nature of Business and Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands			12 Months Ended
	Jul. 03, 2023	Mar. 31, 2021	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2021	Jul. 31, 2020
Significant Accounting Policies [Line Items]
Restricted cash			$ 864,000	$ 16,000
Restricted cash, current			174,008	12,023	$ 0
Restricted cash, non-current			$ 689,645	$ 4,233	$ 0
Preferred stock, dividend rate			6%	6%
Redeemable convertible preferred stock, shares outstanding (in shares)			215,000	215,000	75,000	75,000
Convertible preferred stock, shares issued (in shares)			215,000	215,000
Amortization period of sales commissions expensed			1 year
Common Stock
Significant Accounting Policies [Line Items]
Preferred stock, shares converted (in shares)	10,240,290
Mandatory Convertible Preferred Stock
Significant Accounting Policies [Line Items]
Preferred stock, conversion ratio (in shares)	4.4523
Redeemable convertible preferred stock, shares outstanding (in shares)			0
Convertible preferred stock, shares issued (in shares)			0				2,300,000
Series B-1 Convertible Preferred Stock
Significant Accounting Policies [Line Items]
Preferred stock, dividend rate		5%
Redeemable convertible preferred stock, shares outstanding (in shares)			75,000
Convertible preferred stock, shares issued (in shares)			75,000
Preferred stock, accretion period			10 years
Series B-2 Convertible Preferred Stock
Significant Accounting Policies [Line Items]
Redeemable convertible preferred stock, shares outstanding (in shares)			140,000
Convertible preferred stock, shares issued (in shares)			140,000
Preferred stock, accretion period			10 years
Minimum
Significant Accounting Policies [Line Items]
Estimated useful lives of finite-lived intangible assets			1 year
Maximum
Significant Accounting Policies [Line Items]
Estimated useful lives of finite-lived intangible assets			20 years
Building, Building Improvements and Land Improvements \| Minimum
Significant Accounting Policies [Line Items]
Estimated useful lives for property, plant and equipment			10 years
Building, Building Improvements and Land Improvements \| Maximum
Significant Accounting Policies [Line Items]
Estimated useful lives for property, plant and equipment			40 years
Machinery and equipment \| Minimum
Significant Accounting Policies [Line Items]
Estimated useful lives for property, plant and equipment			3 years
Machinery and equipment \| Maximum
Significant Accounting Policies [Line Items]
Estimated useful lives for property, plant and equipment			20 years

Coherent Acquisition - Addition

Coherent Acquisition - Additional Information (Details) - USD ($)		12 Months Ended
	Jul. 01, 2022	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022
Business Acquisition [Line Items]
Net cash outflow		$ 0	$ 5,488,556,000	$ 0
Goodwill		4,464,329,000	4,512,700,000	1,285,759,000
Lasers
Business Acquisition [Line Items]
Goodwill		$ 3,181,754,000	3,228,801,000	$ 0
Line of credit \| Credit Agreement \| Secured Debt
Business Acquisition [Line Items]
Aggregate amount of credit facility	$ 4,000,000,000
Line of credit \| Credit Agreement \| Term Loan A Facility
Business Acquisition [Line Items]
Aggregate amount of credit facility	850,000,000
Line of credit \| Credit Agreement \| Term Loan B Facility
Business Acquisition [Line Items]
Aggregate amount of credit facility	2,800,000,000
Line of credit \| Credit Agreement \| Revolving Credit Facility
Business Acquisition [Line Items]
Aggregate amount of credit facility	350,000,000
Line of credit \| Credit Agreement \| Letter of Credit
Business Acquisition [Line Items]
Aggregate amount of credit facility	$ 50,000,000
Coherent, Inc.
Business Acquisition [Line Items]
Common stock, par value (in usd per share)	$ 0.01
Acquisition, cash consideration per share (in usd per share)	$ 220
Acquisition, number of shares to be received by acquiree (in shares)	0.91
Net cash outflow	$ 2,100,000,000
Acquisition related costs	94,000,000
Total consideration	7,095,783,000
Goodwill	$ 3,174,984,000
Coherent, Inc. \| Lasers
Business Acquisition [Line Items]
Revenues of acquiree			1,469,000,000
Net loss of acquiree			$ 412,000,000
Coherent, Inc. \| Common Stock
Business Acquisition [Line Items]
Common stock, par value (in usd per share)	$ 0
Shares issued in conjunction with closing	22,587,885

Coherent Acquisition - Schedule

Coherent Acquisition - Schedule of Fair Value of Consideration Paid (Details) - Coherent, Inc. $ / shares in Units, $ in Thousands	Jul. 01, 2022 USD ($) $ / shares shares
Business Acquisition [Line Items]
Cash paid for merger consideration	$ 5,460,808
Payment of Coherent, Inc. debt	364,544
Payment of Coherent, Inc. transaction expenses	62,840
Total Consideration	7,095,783
Restricted Share Units
Business Acquisition [Line Items]
Shares of COHR common stock issued to Coherent, Inc. stockholders and Converted Coherent, Inc. RSUs attributable to pre-combination service	$ 82,037
Common Stock
Business Acquisition [Line Items]
Shares of COHR common stock issued to Coherent, Inc. stockholders (in shares) \| shares	22,587,885
Shares of COHR common stock issued to Coherent, Inc. stockholders (in usd per share) \| $ / shares	$ 49.83
Shares of COHR common stock issued to Coherent, Inc. stockholders and Converted Coherent, Inc. RSUs attributable to pre-combination service	$ 1,125,554

Coherent Acquisition - Schedu_2

Coherent Acquisition - Schedule of Allocation of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022	Jul. 01, 2022
Current Assets
Goodwill	$ 4,464,329	$ 4,512,700	$ 1,285,759
Current Liabilities
Cost of goods sold	$ 3,251,724	3,541,817	$ 2,051,120
Coherent, Inc.
Current Assets
Cash, cash equivalents, and restricted cash				$ 393,324
Accounts receivable				270,928
Inventories				562,884
Prepaid and refundable income taxes				4,832
Prepaid and other current assets				37,805
Total Current Assets				1,269,773
Property, plant, and equipment, net				440,932
Deferred income taxes				236
Other assets				106,388
Other intangible assets, net				3,505,000
Goodwill				3,174,984
Total Assets				8,497,313
Current Liabilities
Current portion of long-term debt				4,504
Accounts payable				116,754
Accrued compensation and benefits				58,631
Operating lease current liabilities				13,002
Accrued income taxes payable				25,052
Other accrued liabilities				138,924
Total Current Liabilities				356,867
Long-term debt				22,991
Deferred income taxes				877,598
Operating lease liabilities				43,313
Other liabilities				100,761
Total Liabilities				1,401,530
Final aggregate acquisition consideration				$ 7,095,783
Coherent, Inc. \| Fair Value Adjustment to Inventory
Current Liabilities
Cost of goods sold		$ 158,000

Coherent Acquisition - Schedu_3

Coherent Acquisition - Schedule of Identifiable Intangible Assets Acquired (Details) - Coherent, Inc. $ in Thousands	Jul. 01, 2022 USD ($)
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets acquired	$ 3,505,000
Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Fair Value	$ 1,830,000
Estimated Useful Life	15 years
Developed technology
Acquired Finite-Lived Intangible Assets [Line Items]
Fair Value	$ 1,157,500
Estimated Useful Life	13 years 6 months
Backlog
Acquired Finite-Lived Intangible Assets [Line Items]
Fair Value	$ 87,500
Estimated Useful Life	1 year
Trade names and trademarks
Acquired Finite-Lived Intangible Assets [Line Items]
Trade names and trademarks	$ 430,000

Coherent Acquisition - Schedu_4

Coherent Acquisition - Schedule of Unaudited Supplemental Pro Forma Information (Details) - Coherent, Inc. - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Business Acquisition [Line Items]
Revenue	$ 5,160,100	$ 4,837,103
Net Earnings (Loss)	$ 105,849	$ (289,615)

Revenue from Contracts with C_3

Revenue from Contracts with Customers - Schedule of Disaggregated Revenue by Market (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022
Disaggregation of Revenue [Line Items]
Revenues	$ 4,707,688	$ 5,160,100	$ 3,316,616
Industrial
Disaggregation of Revenue [Line Items]
Revenues	1,680,176	1,761,621	746,763
Communications
Disaggregation of Revenue [Line Items]
Revenues	2,273,761	2,293,380	2,154,830
Electronics
Disaggregation of Revenue [Line Items]
Revenues	355,905	625,639	310,374
Instrumentation
Disaggregation of Revenue [Line Items]
Revenues	397,846	479,460	104,649
Networking
Disaggregation of Revenue [Line Items]
Revenues	2,295,729	2,340,930	2,197,249
Networking \| Industrial
Disaggregation of Revenue [Line Items]
Revenues	63,905	70,076	84,032
Networking \| Communications
Disaggregation of Revenue [Line Items]
Revenues	2,192,286	2,219,677	2,064,424
Networking \| Electronics
Disaggregation of Revenue [Line Items]
Revenues	6,655	11,488	12,218
Networking \| Instrumentation
Disaggregation of Revenue [Line Items]
Revenues	32,883	39,689	36,575
Materials
Disaggregation of Revenue [Line Items]
Revenues	1,016,573	1,349,758	1,119,367
Materials \| Industrial
Disaggregation of Revenue [Line Items]
Revenues	546,003	603,664	662,731
Materials \| Communications
Disaggregation of Revenue [Line Items]
Revenues	81,475	73,703	90,406
Materials \| Electronics
Disaggregation of Revenue [Line Items]
Revenues	349,250	614,151	298,156
Materials \| Instrumentation
Disaggregation of Revenue [Line Items]
Revenues	39,845	58,240	68,074
Lasers
Disaggregation of Revenue [Line Items]
Revenues	1,395,386	1,469,412	0
Lasers \| Industrial
Disaggregation of Revenue [Line Items]
Revenues	1,070,268	1,087,881	0
Lasers \| Communications
Disaggregation of Revenue [Line Items]
Revenues	0	0	0
Lasers \| Electronics
Disaggregation of Revenue [Line Items]
Revenues	0	0	0
Lasers \| Instrumentation
Disaggregation of Revenue [Line Items]
Revenues	$ 325,118	$ 381,531	$ 0

Revenue from Contracts with C_4

Revenue from Contracts with Customers - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Revenue from Contract with Customer [Abstract]
Revenue recognized related to customer payments	$ 100,000
Contract liabilities	76,000	$ 148,000
Deferred revenue included in other accrued liabilities	62,123	104,477
Deferred revenue included within other liabilities	$ 13,000	$ 43,000

Inventories (Details)

Inventories (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Jun. 30, 2023
Inventory Disclosure [Abstract]
Raw materials	$ 429,888	$ 462,436
Work in progress	620,575	549,992
Finished goods	235,941	259,905
Total Inventories	$ 1,286,404	$ 1,272,333

Property, Plant & Equipment (De

Property, Plant & Equipment (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Jun. 30, 2023
Property, Plant and Equipment [Line Items]
Finance lease right-of-use asset	$ 25,000	$ 25,000
Property, plant, and equipment and finance lease right-of-use asset	3,299,341	3,041,969
Less accumulated depreciation	(1,482,082)	(1,259,934)
Property, plant, and equipment, net	1,817,259	1,782,035
Accumulated depreciation of finance lease ROU assets	12,000	11,000
Land and land improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	66,156	69,639
Buildings and improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	774,991	780,204
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	2,034,310	1,879,136
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 398,884	$ 287,990

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets - Schedule of Changes in Carrying Amount of Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Goodwill [Roll Forward]
Balance at beginning of period	$ 4,512,700	$ 1,285,759
Goodwill acquired		3,174,984
Foreign currency translation and other	(48,371)	51,957
Balance-end of period	4,464,329	4,512,700
Networking
Goodwill [Roll Forward]
Balance at beginning of period	1,036,204	1,013,277
Goodwill acquired		0
Foreign currency translation and other	388	22,927
Balance-end of period	1,036,592	1,036,204
Materials
Goodwill [Roll Forward]
Balance at beginning of period	247,695	272,482
Goodwill acquired		0
Foreign currency translation and other	(1,712)	(24,787)
Balance-end of period	245,983	247,695
Lasers
Goodwill [Roll Forward]
Balance at beginning of period	3,228,801	0
Goodwill acquired		3,174,984
Foreign currency translation and other	(47,047)	53,817
Balance-end of period	$ 3,181,754	$ 3,228,801

Goodwill and Other Intangible_4

Goodwill and Other Intangible Assets - Schedule of Gross Carrying Amount and Accumulated Amortization of Intangible Assets Other Than Goodwill (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Jun. 30, 2023
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 4,491,101	$ 4,521,927
Accumulated Amortization	(987,854)	(707,243)
Net Book Value	3,503,247	3,814,684
Technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,653,289	1,661,263
Accumulated Amortization	(394,040)	(270,786)
Net Book Value	1,259,249	1,390,477
Trade Names
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	438,470	438,470
Accumulated Amortization	(8,470)	(8,279)
Net Book Value	430,000	430,191
Customer Lists
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	2,310,550	2,333,360
Accumulated Amortization	(498,252)	(339,344)
Net Book Value	1,812,298	1,994,016
Backlog and Other
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	88,792	88,834
Accumulated Amortization	(87,092)	(88,834)
Net Book Value	$ 1,700	$ 0

Goodwill and Other Intangible_5

Goodwill and Other Intangible Assets - Additional Information (Details) - USD ($)		12 Months Ended
	Jul. 01, 2022	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022
Goodwill and Other Intangible Assets [Line Items]
Amortization expense on intangible assets		$ 288,000,000	$ 414,000,000	$ 80,000,000
Impairment charges		$ 0	$ 39,000,000	$ 0
Impairment, Intangible Asset, Statement of Income or Comprehensive Income [Extensible Enumeration]			Costs and Expenses
Trade Names \| Coherent, Inc.
Goodwill and Other Intangible Assets [Line Items]
Indefinite-lived intangibles acquired	$ 430,000,000
Materials
Goodwill and Other Intangible Assets [Line Items]
Impairment charges			$ 33,000,000
Networking
Goodwill and Other Intangible Assets [Line Items]
Impairment charges			7,000,000
Minimum
Goodwill and Other Intangible Assets [Line Items]
Amortization period of intangible assets		1 year
Maximum
Goodwill and Other Intangible Assets [Line Items]
Amortization period of intangible assets		20 years
Technology
Goodwill and Other Intangible Assets [Line Items]
Weighted-average remaining life of intangible assets		155 months
Technology \| Coherent, Inc.
Goodwill and Other Intangible Assets [Line Items]
Amortization period of intangible assets	13 years 6 months
Technology \| Minimum
Goodwill and Other Intangible Assets [Line Items]
Amortization period of intangible assets		60 months
Technology \| Maximum
Goodwill and Other Intangible Assets [Line Items]
Amortization period of intangible assets		240 months
Customer Lists
Goodwill and Other Intangible Assets [Line Items]
Weighted-average remaining life of intangible assets		148 months
Customer Lists \| Minimum
Goodwill and Other Intangible Assets [Line Items]
Amortization period of intangible assets		72 months
Customer Lists \| Maximum
Goodwill and Other Intangible Assets [Line Items]
Amortization period of intangible assets		192 months
Technology and Customer Lists
Goodwill and Other Intangible Assets [Line Items]
Impairment charges			25,000,000
Technology and Customer Lists \| Cost of Sales
Goodwill and Other Intangible Assets [Line Items]
Impairment charges			$ 8,000,000
Impairment, Intangible Asset, Statement of Income or Comprehensive Income [Extensible Enumeration]			Cost of goods sold
Technology and Customer Lists \| Selling, General and Administrative Expenses
Goodwill and Other Intangible Assets [Line Items]
Impairment charges			$ 18,000,000
Impairment, Intangible Asset, Statement of Income or Comprehensive Income [Extensible Enumeration]			Selling, general and administrative
Trade Names
Goodwill and Other Intangible Assets [Line Items]
Impairment charges			$ 14,000,000

Goodwill and Other Intangible_6

Goodwill and Other Intangible Assets - Schedule of Estimated Amortization Expense for Existing Intangible Assets (Details) $ in Thousands	Jun. 30, 2024 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
2025	$ 270,150
2026	269,041
2027	267,928
2028	266,238
2029	$ 260,394

Debt - Schedule of Components o

Debt - Schedule of Components of Debt (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Dec. 10, 2021	Dec. 21, 2020
Line of Credit Facility [Line Items]
Debt, gross	$ 4,169,577
Total debt	4,100,218	$ 4,309,798
Current portion of long-term debt	(73,770)	(74,836)
Long-term debt, less current portion	4,026,448	4,234,962
5.00% Senior Notes
Line of Credit Facility [Line Items]
Interest rate on debt			5%
Line of credit \| Secured Debt
Line of Credit Facility [Line Items]
Debt, gross	$ 19,000
Line of credit \| Credit Agreement \| Term Loan A Facility
Line of Credit Facility [Line Items]
Basis spread on variable rate	2%
Debt, gross	$ 775,625	818,125
Line of credit \| Credit Agreement \| Revolving Credit Facility
Line of Credit Facility [Line Items]
Basis spread on variable rate	2%
Debt, gross	$ 0	0
Line of credit \| Credit Agreement \| Term Loan A And Revolving Credit Facility
Line of Credit Facility [Line Items]
Debt issuance costs	$ (13,586)	(18,149)
Line of credit \| Credit Agreement \| Term Loan B Facility
Line of Credit Facility [Line Items]
Basis spread on variable rate	2.50%
Debt, gross	$ 2,384,536	2,566,625
Debt issuance costs	$ (49,835)	(63,977)
Line of credit \| 1.3% Term loan \| Secured Debt
Line of Credit Facility [Line Items]
Interest rate on debt	1.30%
Debt, gross	$ 335	1,697
Line of credit \| Facility construction loan in Germany \| Secured Debt
Line of Credit Facility [Line Items]
Interest rate on debt				1.55%
Debt, gross	$ 19,082	22,340
Senior Notes \| 5.00% Senior Notes
Line of Credit Facility [Line Items]
Interest rate on debt	5%
Debt, gross	$ 990,000	990,000
Debt issuance costs	$ (5,939)	$ (6,863)

Debt - Schedule of Principal Re

Debt - Schedule of Principal Repayments for Indebtedness (Details) $ in Thousands	Jun. 30, 2024 USD ($)
Debt Disclosure [Abstract]
2025	$ 70,126
2026	85,730
2027	91,042
2028	638,230
2029	27,292
Thereafter	3,257,157
Total debt	$ 4,169,577

Debt - Senior Credit Facility (

Debt - Senior Credit Facility (Details) - USD ($)			12 Months Ended
Debt - Senior Credit Facility (Details) - USD ($)	Apr. 02, 2024	Mar. 31, 2023	Jun. 30, 2024	Jun. 30, 2023	Jul. 01, 2022	Dec. 10, 2021
5.00% Senior Notes
Line of Credit Facility [Line Items]
Interest rate on debt						5%
Line of credit \| Credit Agreement \| Secured Debt
Line of Credit Facility [Line Items]
Aggregate amount of credit facility					$ 4,000,000,000
Interest expense incurred			$ 237,000,000	$ 239,000,000
Interest expense increase (decrease)			(45,000,000)	(20,000,000)
Amortization of debt issuance costs			$ 15,000,000	18,000,000
Line of credit \| Credit Agreement \| Term Loan A Facility
Line of Credit Facility [Line Items]
Aggregate amount of credit facility					850,000,000
Adjusted variable rate floor		0.10%
Basis spread on variable rate			2%
Line of credit \| Credit Agreement \| Term Loan A Facility \| Minimum
Line of Credit Facility [Line Items]
Basis spread on variable rate		1.75%
Line of credit \| Credit Agreement \| Term Loan A Facility \| Maximum
Line of Credit Facility [Line Items]
Basis spread on variable rate		2.50%
Line of credit \| Credit Agreement \| Term Loan B Facility
Line of Credit Facility [Line Items]
Aggregate amount of credit facility					2,800,000,000
Adjusted variable rate floor	0.50%
Basis spread on variable rate			2.50%
Debt extinguishment costs			$ 2,000,000
Line of credit \| Credit Agreement \| Revolving Credit Facility
Line of Credit Facility [Line Items]
Aggregate amount of credit facility					350,000,000
Adjusted variable rate floor		0.10%
Basis spread on variable rate			2%
Line of credit \| Credit Agreement \| Revolving Credit Facility \| Minimum
Line of Credit Facility [Line Items]
Basis spread on variable rate		1.75%
Line of credit \| Credit Agreement \| Revolving Credit Facility \| Maximum
Line of Credit Facility [Line Items]
Basis spread on variable rate		2.50%
Line of credit \| Credit Agreement \| Letter of Credit
Line of Credit Facility [Line Items]
Aggregate amount of credit facility					$ 50,000,000
Senior Notes \| 5.00% Senior Notes
Line of Credit Facility [Line Items]
Interest expense incurred			$ 50,000,000	$ 50,000,000
Interest rate on debt			5%

Debt - Prior Senior Credit Faci

Debt - Prior Senior Credit Facilities (Details) $ in Millions	Jul. 01, 2022 USD ($)
Line of credit \| Prior Credit Agreement \| Secured Debt
Line of Credit Facility [Line Items]
Debt extinguishment costs	$ 17

Debt - Bridge Loan Commitment (

Debt - Bridge Loan Commitment (Details) - Bridge Loan - USD ($)	12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jul. 01, 2022
Line of Credit Facility [Line Items]
Aggregate principal amount of bridge loan			$ 990,000,000
Incurred expenses	$ 18,000,000	$ 3,000,000

Debt - Debt Assumed Through Acq

Debt - Debt Assumed Through Acquisition (Details) $ in Thousands	Dec. 21, 2020 EUR (€)	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Jul. 01, 2022 loan
Debt Instrument [Line Items]
Aggregate principal outstanding		$ 4,169,577
Line of credit \| Secured Debt
Debt Instrument [Line Items]
Aggregate principal outstanding		19,000
Line of credit \| 1.3% Term loan \| Secured Debt
Debt Instrument [Line Items]
Aggregate principal outstanding		$ 335	$ 1,697
Interest rate on debt		1.30%
Line of credit \| 1.00% State of Connecticut Term Loan due 2023 \| Secured Debt
Debt Instrument [Line Items]
Interest rate on debt		1%
Line of credit \| Facility construction loan in Germany \| Secured Debt
Debt Instrument [Line Items]
Aggregate principal outstanding		$ 19,082	$ 22,340
Interest rate on debt	1.55%
Aggregate amount of credit facility \| €	€ 24,000,000
Term of loan	10 years
Coherent, Inc.
Debt Instrument [Line Items]
Number of loans assumed \| loan				3

Debt - Senior Notes (Details)

Debt - Senior Notes (Details) - USD ($)		12 Months Ended
Debt - Senior Notes (Details) - USD ($)	Dec. 10, 2021	Jun. 30, 2024	Jun. 30, 2023
Debt Instrument [Line Items]
Weighted average interest rate of total borrowings		7%	6%
5.00% Senior Notes
Debt Instrument [Line Items]
Interest rate on debt	5%
Senior Notes \| 5.00% Senior Notes
Debt Instrument [Line Items]
Interest rate on debt		5%
Aggregate principal amount of bridge loan	$ 990,000,000
Interest expense incurred		$ 50,000,000	$ 50,000,000
Senior Notes \| 5.00% Senior Notes \| Senior Notes, Redemption, Period One
Debt Instrument [Line Items]
Redemption price, percentage of principal amount	100%
Senior Notes \| 5.00% Senior Notes \| Senior Notes, Redemption, Period Two
Debt Instrument [Line Items]
Redemption percentage	40%
Senior Notes \| 5.00% Senior Notes \| Senior Notes, Redemption, Period Three
Debt Instrument [Line Items]
Redemption price, percentage of principal amount	105%
Line of credit \| Credit Agreement \| Revolving Credit Facility
Debt Instrument [Line Items]
Available credit under lines of credit		$ 346,000,000

Income Taxes - Schedule of Comp

Income Taxes - Schedule of Components of Earnings (Losses) Before Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022
Income Tax Disclosure [Abstract]
U.S. loss	$ (540,048)	$ (450,370)	$ (62,721)
Non-U.S. income	392,401	94,812	344,528
Earnings (loss) before income taxes	$ (147,647)	$ (355,558)	$ 281,807

Income Taxes - Schedule of Co_2

Income Taxes - Schedule of Components of Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022
Current:
Federal	$ 10,119	$ 5	$ 1,569
State	181	3,867	768
Foreign	103,640	106,850	52,865
Total Current	113,940	110,722	55,202
Deferred:
Federal	(68,955)	(106,044)	(7,185)
State	(186)	(7,151)	(1,215)
Foreign	(33,682)	(93,627)	246
Total Deferred	(102,823)	(206,822)	(8,154)
Total Income Tax Expense (Benefit)	$ 11,117	$ (96,100)	$ 47,048

Income Taxes - Schedule of Prin

Income Taxes - Schedule of Principal Items Comprising Deferred Assets and Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Jun. 30, 2023
Deferred income tax assets
Inventory capitalization	$ 62,242	$ 60,232
Non-deductible accruals	16,770	18,423
Accrued employee benefits	38,460	40,292
Net-operating loss and credit carryforwards	268,735	234,546
Share-based compensation expense	15,947	16,729
Other	1,346	9,256
Research and development capitalization	128,291	85,473
Deferred revenue	14,839	11,415
Right of use asset	47,712	42,688
Valuation allowances	(154,830)	(97,180)
Total deferred income tax assets	439,512	421,874
Deferred income tax liabilities
Tax over book accumulated depreciation	(29,065)	(56,742)
Intangible assets	(905,435)	(988,580)
Tax on unremitted earnings	(61,719)	(51,672)
Outside basis differences	(122,423)	0
Lease liability	(46,198)	(41,426)
Other	(2,511)	(6,757)
Total deferred income tax liabilities	(1,182,920)	(1,164,433)
Net deferred income taxes	(743,408)	(742,559)
Interest Rate Swap
Deferred income tax liabilities
Interest rate swap/cap	(4,104)	(8,522)
Interest Rate Cap
Deferred income tax liabilities
Interest rate swap/cap	$ (11,465)	$ (10,734)

Income Taxes - Schedule of Reco

Income Taxes - Schedule of Reconciliation of Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022
Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract]
Taxes at statutory rate	$ (31,006)	$ (74,667)	$ 59,179
Increase (decrease) in taxes resulting from:
State income taxes-net of federal benefit	(22)	(2,548)	(339)
Taxes on non U.S. earnings	16,601	191	(2,704)
Valuation allowance	43,866	3,836	(1,513)
U.S. Branch Income	3,226	2,037	1,230
Noncontrolling interest	1,002	0	0
Research and manufacturing incentive deductions and credits	(41,387)	(29,416)	(24,341)
Stock compensation	13,294	18,661	2,095
GILTI and FDII	(629)	(7,195)	4,866
Other	6,172	(6,999)	8,575
Total Income Tax Expense (Benefit)	$ 11,117	$ (96,100)	$ 47,048
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Taxes at statutory rate	21%	21%	21%
Increase (decrease) in taxes resulting from:
State income taxes-net of federal benefit	0%	1%	0%
Taxes on non U.S. earnings	(11.00%)	0%	(1.00%)
Valuation allowance	(30.00%)	(1.00%)	(1.00%)
U.S. Branch Income	(2.00%)	(1.00%)	1%
Noncontrolling interest	(1.00%)	0%	0%
Research and manufacturing incentive deductions and credits	28%	8%	(9.00%)
Stock compensation	(9.00%)	(5.00%)	1%
GILTI and FDII	0%	2%	2%
Other	(4.00%)	2%	3%
Total Income Tax Expense (Benefit)	(8.00%)	27%	17%

Income Taxes - Additional Infor

Income Taxes - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022
Income Tax Contingency [Line Items]
Estimated associated withholding tax related to previously taxed earnings	$ 62,000
Cash paid for income taxes	$ 97,295	$ 89,567	$ 50,000
Effective income tax rate, reductions	5.60%	2.30%	1.60%
Interest and penalties recognized within income tax expense (benefit)	$ 2,300	$ 300	$ 400
Interest and penalties accrued	7,000	6,000	3,000
Unrecognized tax benefits that would impact effective tax rate	19,000	$ 92,000	$ 25,000
Unrecognized tax benefits expected decrease during the next 12 months	$ 2,000
Foreign Taxing Jurisdictions
Income Tax Contingency [Line Items]
Impact of income tax holiday on diluted earnings per share (in usd per share)	$ 0.05	$ 0.05	$ 0.04

Income Taxes - Schedule of Gros

Income Taxes - Schedule of Gross Operating Loss Carryforwards and Tax Credit Carryforwards (Details) $ in Thousands	Jun. 30, 2024 USD ($)
Federal
Operating loss carryforwards:
Loss carryforwards	$ 36,014
Loss carryforwards, indefinite	1,968
Foreign
Tax credit carryforwards:
Tax credit carryforwards	0
Operating loss carryforwards:
Loss carryforwards	70,666
Loss carryforwards, indefinite	152,336
State
Tax credit carryforwards:
Tax credit carryforwards	21,420
Tax credit carryforwards, indefinite	79,179
Operating loss carryforwards:
Loss carryforwards	324,702
Loss carryforwards, indefinite	36,719
Federal research and development credits \| Federal
Tax credit carryforwards:
Tax credit carryforwards	$ 138,723

Income Taxes - Schedule of Chan

Income Taxes - Schedule of Changes in Liability for Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning balance	$ 115,180	$ 37,411	$ 38,025
Increases in current year tax positions	5,168	110	1,803
Acquired business	0	86,077	0
Settlements	(2,970)	0	0
Expiration of statute of limitations	(681)	(8,418)	(2,417)
Ending balance	$ 116,697	$ 115,180	$ 37,411

Equity and Redeemable Preferr_3

Equity and Redeemable Preferred Stock - Additional Information (Details) $ / shares in Units, $ in Millions					1 Months Ended	12 Months Ended
	Jul. 03, 2023 shares	Jul. 01, 2022 USD ($) $ / shares shares	Jun. 08, 2021 USD ($)	Mar. 31, 2021 USD ($) day $ / shares shares	Mar. 31, 2021 $ / shares	Jun. 30, 2024 USD ($) shares	Jun. 30, 2023 USD ($) shares	Jun. 30, 2022 shares	Jun. 30, 2021 shares	Jul. 31, 2020 shares
Class of Stock [Line Items]
Preferred stock, shares authorized (in shares)						5,000,000
Mandatory preferred convertible shares outstanding (in shares)						215,000	215,000	75,000	75,000
Convertible preferred stock, shares issued (in shares)						215,000	215,000
Preferred stock, dividend rate						6%	6%
Accrued preferred stock dividends \| $						$ 123	$ 117
Series B-1 Convertible Preferred Stock
Class of Stock [Line Items]
Mandatory preferred convertible shares outstanding (in shares)						75,000
Convertible preferred stock, shares issued (in shares)						75,000
Equity per share price (in usd per share) \| $ / shares				$ 10,000	$ 10,000
Preferred stock, dividend rate				5%
Debt instrument conversion, conversion price (in usd per share) \| $ / shares				$ 85	$ 85
Common stock , conversion, if volume weighted average price, percentage exceeds applicable conversion price				150%
Number of days within 30 consecutive trading days in which the closing price of the entity's common stock must exceed the conversion price for the notes to be convertible into common stock \| day				20
Number of consecutive trading days during which the closing price of the entity's common stock must exceed the conversion price for at least 20 days in order for the notes to be convertible into common stock \| day				30
Default on payment obligation, cure period					30 days
Default on payment obligation, dividend rate, quarterly increase, percentage					2%
Preferred stock, accretion of redemption value, period					10 years
Series B-1 Convertible Preferred Stock \| Maximum
Class of Stock [Line Items]
Preferred stock, default on payment obligation, dividend rate, percentage				14%	14%
Series B-1 Convertible Preferred Stock \| Minimum
Class of Stock [Line Items]
Preferred stock, default on payment obligation, dividend rate, percentage					8%
Series B-1 Convertible Preferred Stock \| Private Placement
Class of Stock [Line Items]
Shares issued and sold (in shares)				75,000
Proceeds from common stock and preferred stock options exercised in full \| $				$ 750
Series B-1 Convertible Preferred Stock \| Over-Allotment Option
Class of Stock [Line Items]
Proceeds from common stock and preferred stock options exercised in full \| $			$ 2,150
Series B-2 Convertible Preferred Stock
Class of Stock [Line Items]
Mandatory preferred convertible shares outstanding (in shares)						140,000
Convertible preferred stock, shares issued (in shares)						140,000
Equity per share price (in usd per share) \| $ / shares		$ 10,000
Series B-2 Convertible Preferred Stock \| Private Placement
Class of Stock [Line Items]
Shares issued and sold (in shares)		140,000
Proceeds from common stock and preferred stock options exercised in full \| $		$ 1,400
Mandatory Convertible Preferred Stock
Class of Stock [Line Items]
Mandatory preferred convertible shares authorized (in shares)						2,300,000
Mandatory preferred convertible shares outstanding (in shares)						0
Convertible preferred stock, shares issued (in shares)						0				2,300,000
Convertible preferred stock, shares issued upon conversion (in shares)	4.4523
Common Stock
Class of Stock [Line Items]
Preferred stock, shares converted (in shares)	10,240,290

Equity and Redeemable Preferr_4

Equity and Redeemable Preferred Stock - Schedule of Dividends Recognized (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022
Class of Stock [Line Items]
Series A Mandatory Convertible Preferred Stock dividends	$ 123,357	$ 144,212	$ 68,225
Mandatory Convertible Preferred Stock
Class of Stock [Line Items]
Dividends per share (in usd per share)	$ 0	$ 12
Series A Mandatory Convertible Preferred Stock dividends	$ 0	$ 27,600
Series B-1 Convertible Preferred Stock
Class of Stock [Line Items]
Dividends per share (in usd per share)	$ 574	$ 542
Series A Mandatory Convertible Preferred Stock dividends	$ 117,894	$ 111,785
Deemed dividends	$ 5,463	$ 4,827

Earnings Per Share - Schedule o

Earnings Per Share - Schedule of Reconciliation of Basic and Diluted of Earnings (loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022
Numerator
Net earnings (loss) attributable to Coherent Corp.	$ (156,154)	$ (259,458)	$ 234,759
Deduct dividends	(123,357)	(144,212)	(68,225)
Net Earnings (Loss) Available to the Common Shareholders	(279,511)	(403,670)	166,534
Effect of dilutive securities:
Add back interest on Convertible Notes (net of tax)	0	0	2,229
Diluted earnings (loss) available to the common shareholders	$ (279,511)	$ (403,670)	$ 168,763
Denominator
Weighted average shares (in shares)	151,642	137,578	106,189
Effect of dilutive securities
Common stock equivalents (in shares)	0	0	3,012
Convertible Notes (in shares)	0	0	7,312
Diluted weighted average common shares (in shares)	151,642	137,578	116,513
Basic earnings (loss) per common share (in usd per share)	$ (1.84)	$ (2.93)	$ 1.57
Diluted earnings (loss) per common share (in usd per share)	$ (1.84)	$ (2.93)	$ 1.45
Series A Preferred Stock
Numerator
Deduct dividends	$ 0	$ (27,600)	$ (27,600)
Series B Convertible Preferred Stock
Numerator
Deduct dividends	$ (123,357)	$ (116,612)	$ (40,625)

Earnings Per Share - Schedule_2

Earnings Per Share - Schedule of Potential Shares Excluded from Calculation of Diluted Net Earnings (Loss) Per Share (Details) - shares shares in Thousands	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total anti-dilutive (in shares)	30,631	39,043	27,688
Series A Mandatory Convertible Preferred Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total anti-dilutive (in shares)	0	10,423	8,915
Series B Convertible Preferred Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total anti-dilutive (in shares)	27,691	26,349	9,162
Common stock equivalents
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total anti-dilutive (in shares)	2,940	2,271	9,611

Noncontrolling Interests - Addi

Noncontrolling Interests - Additional Information (Details) - USD ($) $ in Thousands			12 Months Ended
	Dec. 04, 2023	Oct. 10, 2023	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022
Noncontrolling Interest [Line Items]
Sale of shares to noncontrolling interests		$ 1,000,000	$ 1,000,000	$ 0	$ 0
Silicon Carbide
Noncontrolling Interest [Line Items]
Non-controlling ownership interest percentage		75%
Denso Corporation \| Silicon Carbide
Noncontrolling Interest [Line Items]
Equity investment, ownership percentage		12.50%
Mitsubishi Electric Corporation \| Silicon Carbide
Noncontrolling Interest [Line Items]
Equity investment, ownership percentage		12.50%
Denso Corporation \| Silicon Carbide
Noncontrolling Interest [Line Items]
Sale of stock, value of shares issued		$ 500,000
Denso Corporation \| Silicon Carbide \| Common Class A \| Private Placement
Noncontrolling Interest [Line Items]
Shares issued and sold (in shares)	16,666,667
Mitsubishi Electric Corporation \| Silicon Carbide
Noncontrolling Interest [Line Items]
Sale of stock, value of shares issued		$ 500,000
Mitsubishi Electric Corporation \| Silicon Carbide \| Common Class A \| Private Placement
Noncontrolling Interest [Line Items]
Shares issued and sold (in shares)	16,666,667

Noncontrolling Interests - Sche

Noncontrolling Interests - Schedule of Noncontrolling Interests (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022
Equity, Attributable to Noncontrolling Interest [Roll Forward]
Beginning balance	$ 4,987,551	$ 3,616,475	$ 3,406,170
Sale of shares to noncontrolling interests	840,771
Share of foreign currency translation adjustments	(81,889)	87,927	(89,967)
Net loss	(158,764)	(259,458)	234,759
Ending balance	5,581,507	4,987,551	3,616,475
NCI
Equity, Attributable to Noncontrolling Interest [Roll Forward]
Beginning balance	0	0	0
Sale of shares to noncontrolling interests	373,573
Share of foreign currency translation adjustments	429
Net loss	(2,610)
Ending balance	371,392	0	$ 0
NCI \| Silicon Carbide
Equity, Attributable to Noncontrolling Interest [Roll Forward]
Beginning balance	0
Sale of shares to noncontrolling interests	373,573
Share of foreign currency translation adjustments	429
Net loss	(2,610)
Ending balance	$ 371,392	$ 0

Leases - Schedule of Lease Cost

Leases - Schedule of Lease Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022
Finance Lease Cost
Amortization of right-of-use assets	$ 1,667	$ 1,667	$ 1,671
Interest on lease liabilities	1,040	1,124	1,200
Total finance lease cost	2,707	2,791	2,871
Operating lease cost	52,909	53,127	36,716
Sublease income	0	0	507
Total lease cost	55,616	55,918	39,080
Cash Paid for Amounts Included in the Measurement of Lease Liabilities
Operating cash flows from finance leases	1,040	1,124	1,200
Operating cash flows from operating leases	50,672	50,503	35,481
Financing cash flows from finance leases	1,584	1,430	1,290
Assets Obtained in Exchange for Lease Liabilities
Right-of-use assets obtained in acquisitions	0	56,315	0
Right-of-use assets obtained in exchange for new operating lease liabilities	64,385	27,720	18,161
Total assets obtained in exchange for new operating lease liabilities	$ 64,385	$ 84,035	$ 18,161
Weighted-Average Remaining Lease Term (in Years)
Finance leases	7 years 6 months	8 years 6 months	9 years 6 months
Operating leases	6 years 7 months 6 days	6 years 10 months 24 days	6 years 7 months 6 days
Weighted-Average Discount Rate
Finance leases	5.60%	5.60%	5.60%
Operating leases	6.80%	5.50%	5.70%

Leases - Schedule of Future Min

Leases - Schedule of Future Minimum Lease Payments (Details) $ in Thousands	Jun. 30, 2024 USD ($)
Operating Leases
Year 1	$ 52,461
Year 2	44,876
Year 3	34,923
Year 4	26,469
Year 5	23,833
Thereafter	75,033
Total minimum lease payments	257,595
Less: amounts representing interest	54,660
Present value of total operating lease liabilities	202,935
Finance Leases
Year 1	2,697
Year 2	2,771
Year 3	2,847
Year 4	2,925
Year 5	3,006
Thereafter	7,757
Total minimum lease payments	22,003
Less: amounts representing interest	4,120
Present value of total finance lease liabilities	$ 17,883
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Other accrued liabilities
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other liabilities
Total
Year 1	$ 55,158
Year 2	47,647
Year 3	37,770
Year 4	29,394
Year 5	26,839
Thereafter	82,790
Total minimum lease payments	279,598
Less: amounts representing interest	58,780
Present value of total lease liabilities	$ 220,818

Share-Based Compensation - Addi

Share-Based Compensation - Additional Information (Details) - USD ($)		12 Months Ended
	Jun. 03, 2024	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Stock option issued (in shares)		0	0	0
Aggregate intrinsic value of stock options and cash-based stock appreciation rights, outstanding		$ 61,000,000	$ 44,000,000	$ 48,000,000
Aggregate intrinsic value of stock options and cash-based stock appreciation rights, exercisable		61,000,000	44,000,000	48,000,000
Total intrinsic value of stock options and cash-based stock appreciation rights, exercised		$ 25,000,000	5,000,000	8,000,000
Plan
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Shares granted (in shares)		6,000,000
Employee Stock Purchase Plan
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Market price of common stock	85%
Consecutive offering period	6 months
Employee Stock Purchase Plan \| Minimum
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Employee stock purchase plan of payroll deductions	10%
Employee Stock Purchase Plan \| Maximum
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Employee stock purchase plan of payroll deductions	15%
Employee Stock Purchase Plan \| Plan
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Common stock authorized for issuance under the plan (in shares)		13,450,000
Employee Stock Purchase Plan \| Coherent, Inc. Plan
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Shares granted (in shares)		0
Restricted Share Units
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Units granted (in shares)	147,214	2,740,565
Award vesting period	3 years
Performance Stock Units
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Units granted (in shares)	694,007	1,244,605
Award vesting period	3 years
Share based compensation expense attributable to non-vested shares		$ 102,000,000
Unrecognized compensation cost, weighted-average period of recognition, years		2 years 2 months 26 days
Total fair value of restricted stock grant		$ 113,000,000	27,000,000	14,000,000
Total fair value of restricted stock vested		$ 14,000,000	$ 24,000,000	11,000,000
Performance Stock Units \| Minimum
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Award grants performance period		12 months
Performance Stock Units \| Maximum
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Award grants performance period		36 months
Stock Options and Cash-Based Stock Appreciation Rights
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Share based compensation expense attributable to non-vested shares		$ 0
Restricted Share Awards and Cash-Based Restricted Share Unit Awards
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Award vesting period		3 years
Share based compensation expense attributable to non-vested shares		$ 96,000,000
Unrecognized compensation cost, weighted-average period of recognition, years		2 years
Shares issued (in shares)		0	0
Total fair value of restricted stock grant		$ 110,000,000	$ 102,000,000	54,000,000
Total fair value of restricted stock vested		$ 74,000,000	$ 131,000,000	$ 67,000,000

Share-Based Compensation - Sche

Share-Based Compensation - Schedule of Share-Based Compensation Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Share based compensation expense	$ 126,895	$ 149,631	$ 73,103
Stock Options and Cash-Based Stock Appreciation Rights
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Share based compensation expense	1,149	2,602	3,218
Restricted Share Awards and Cash-Based Restricted Share Unit Awards
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Share based compensation expense	92,634	124,212	56,365
Performance Share Awards and Cash-Based Performance Share Unit Awards
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Share based compensation expense	21,912	14,998	10,077
Employee Stock Purchase Plan
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Share based compensation expense	$ 11,200	$ 7,819	$ 3,443

Share-Based Compensation - Sc_2

Share-Based Compensation - Schedule of Stock Option and Cash-Based Stock Appreciation Rights (Details)	12 Months Ended
	Jun. 30, 2024 $ / shares shares
Number of Shares
Outstanding, beginning balance (in shares) \| shares	2,186,944
Exercised (in shares) \| shares	(685,615)
Forfeitures and Expired (in shares) \| shares	(10,684)
Outstanding, ending balance (in shares) \| shares	1,490,645
Exercisable (in shares) \| shares	1,490,645
Weighted Average Exercise Price
Outstanding, beginning balance (in usd per share) \| $ / shares	$ 30.15
Exercised (in usd per share) \| $ / shares	24.64
Forfeited and Expired (in usd per share) \| $ / shares	39.74
Outstanding, ending balance (in usd per share) \| $ / shares	32.62
Exercisable (in usd per share) \| $ / shares	$ 32.62
Cash-Based Stock Appreciation Rights
Number of Rights
Outstanding, beginning balance (in shares) \| shares	102,890
Exercised (in shares) \| shares	(53,932)
Forfeited and Expired (in shares) \| shares	(2,087)
Outstanding, ending balance (in shares) \| shares	46,871
Exercisable (in shares) \| shares	46,871
Weighted Average Exercise Price
Outstanding, beginning balance (in usd per share) \| $ / shares	$ 35.12
Exercised (in usd per share) \| $ / shares	34.90
Forfeited and Expired (in usd per share) \| $ / shares	32.70
Outstanding, ending balance (in usd per share) \| $ / shares	35.48
Exercisable (in usd per share) \| $ / shares	$ 35.48

Share-Based Compensation - Sc_3

Share-Based Compensation - Schedule of Outstanding and Exercisable Stock Options (Details) - Stock Options and Cash-Based Stock Appreciation Rights	12 Months Ended
	Jun. 30, 2024 $ / shares shares
Stock Options and Cash-Based Stock Appreciation Rights Outstanding
Number of Shares or Rights (in shares) \| shares	1,537,516
Weighted Average Remaining Contractual Term	3 years 5 months 19 days
Weighted Average Exercise Price (in usd per share)	$ 32.71
Stock Options and Cash-Based Stock Appreciation Rights Exercisable
Number of Shares or Rights (in shares) \| shares	1,537,516
Weighted Average Remaining Contractual Term	3 years 5 months 19 days
Weighted Average Exercise Price (in usd per share)	$ 32.71
$13.34 - $18.07
Share-Based Payment Arrangement, Option, Exercise Price Range [Line Items]
Range of Exercise Prices, lower range (in usd per share)	13.34
Range of Exercise Prices, upper range (in usd per share)	$ 18.07
Stock Options and Cash-Based Stock Appreciation Rights Outstanding
Number of Shares or Rights (in shares) \| shares	220,107
Weighted Average Remaining Contractual Term	1 year 29 days
Weighted Average Exercise Price (in usd per share)	$ 17.68
Stock Options and Cash-Based Stock Appreciation Rights Exercisable
Number of Shares or Rights (in shares) \| shares	220,107
Weighted Average Remaining Contractual Term	1 year 29 days
Weighted Average Exercise Price (in usd per share)	$ 17.68
$18.07 - $24.35
Share-Based Payment Arrangement, Option, Exercise Price Range [Line Items]
Range of Exercise Prices, lower range (in usd per share)	18.07
Range of Exercise Prices, upper range (in usd per share)	$ 24.35
Stock Options and Cash-Based Stock Appreciation Rights Outstanding
Number of Shares or Rights (in shares) \| shares	294,425
Weighted Average Remaining Contractual Term	2 years 29 days
Weighted Average Exercise Price (in usd per share)	$ 21.52
Stock Options and Cash-Based Stock Appreciation Rights Exercisable
Number of Shares or Rights (in shares) \| shares	294,425
Weighted Average Remaining Contractual Term	2 years 29 days
Weighted Average Exercise Price (in usd per share)	$ 21.52
$24.35 - $35.39
Share-Based Payment Arrangement, Option, Exercise Price Range [Line Items]
Range of Exercise Prices, lower range (in usd per share)	24.35
Range of Exercise Prices, upper range (in usd per share)	$ 35.39
Stock Options and Cash-Based Stock Appreciation Rights Outstanding
Number of Shares or Rights (in shares) \| shares	300,515
Weighted Average Remaining Contractual Term	3 years 6 months 25 days
Weighted Average Exercise Price (in usd per share)	$ 33.94
Stock Options and Cash-Based Stock Appreciation Rights Exercisable
Number of Shares or Rights (in shares) \| shares	300,515
Weighted Average Remaining Contractual Term	3 years 6 months 25 days
Weighted Average Exercise Price (in usd per share)	$ 33.94
$35.39 - $36.90
Share-Based Payment Arrangement, Option, Exercise Price Range [Line Items]
Range of Exercise Prices, lower range (in usd per share)	35.39
Range of Exercise Prices, upper range (in usd per share)	$ 36.90
Stock Options and Cash-Based Stock Appreciation Rights Outstanding
Number of Shares or Rights (in shares) \| shares	420,798
Weighted Average Remaining Contractual Term	5 years 2 months 19 days
Weighted Average Exercise Price (in usd per share)	$ 36.45
Stock Options and Cash-Based Stock Appreciation Rights Exercisable
Number of Shares or Rights (in shares) \| shares	420,798
Weighted Average Remaining Contractual Term	5 years 2 months 19 days
Weighted Average Exercise Price (in usd per share)	$ 36.45
$36.90 - $49.90
Share-Based Payment Arrangement, Option, Exercise Price Range [Line Items]
Range of Exercise Prices, lower range (in usd per share)	36.90
Range of Exercise Prices, upper range (in usd per share)	$ 49.90
Stock Options and Cash-Based Stock Appreciation Rights Outstanding
Number of Shares or Rights (in shares) \| shares	301,671
Weighted Average Remaining Contractual Term	4 years 18 days
Weighted Average Exercise Price (in usd per share)	$ 48.14
Stock Options and Cash-Based Stock Appreciation Rights Exercisable
Number of Shares or Rights (in shares) \| shares	301,671
Weighted Average Remaining Contractual Term	4 years 18 days
Weighted Average Exercise Price (in usd per share)	$ 48.14

Share-Based Compensation - Sc_4

Share-Based Compensation - Schedule of Restricted Share Unit and Cash-Based Restricted Share Unit (Details) - $ / shares		12 Months Ended
	Jun. 03, 2024	Jun. 30, 2024
Restricted Share Units
Number of Units
Nonvested, beginning balance (in shares)		3,521,954
Granted (in shares)	147,214	2,740,565
Vested (in shares)		(2,021,002)
Forfeited (in shares)		(173,632)
Nonvested, ending balance (in shares)		4,067,885
Weighted Average Grant Date Fair Value
Nonvested, beginning balance (in usd per share)		$ 53.33
Granted (in usd per share)		39.95
Vested (in usd per share)		50.89
Forfeited (in usd per share)		45.94
Nonvested, ending balance (in usd per share)		$ 45.84
Cash-Based Restricted Share Units
Number of Units
Nonvested, beginning balance (in shares)		5,975
Granted (in shares)		6,876
Vested (in shares)		(3,062)
Forfeited (in shares)		(805)
Nonvested, ending balance (in shares)		8,984
Weighted Average Grant Date Fair Value
Nonvested, beginning balance (in usd per share)		$ 53.12
Granted (in usd per share)		38.04
Vested (in usd per share)		52.02
Forfeited (in usd per share)		41.45
Nonvested, ending balance (in usd per share)		$ 43

Share-Based Compensation - Sc_5

Share-Based Compensation - Schedule of Performance Share Unit (Details) - Performance Share Units - $ / shares		12 Months Ended
	Jun. 03, 2024	Jun. 30, 2024
Number of Units
Nonvested, beginning balance (in shares)		882,637
Granted (in shares)	694,007	1,244,605
Vested (in shares)		(86,984)
Forfeited (in shares)		(337,517)
Nonvested, ending balance (in shares)		1,702,741
Weighted Average Grant Date Fair Value
Nonvested, beginning balance (in usd per share)		$ 36.11
Granted (in usd per share)		90.71
Vested (in usd per share)		45.12
Forfeited (in usd per share)		44.67
Nonvested, ending balance (in usd per share)		$ 73.86

Segment and Geographic Report_3

Segment and Geographic Reporting - Additional Information (Details)		12 Months Ended
	Jul. 01, 2022 segment	Jun. 30, 2024 endMarket
Segment Reporting [Abstract]
Number of reporting segments \| segment	3
Number of end markets \| endMarket		4

Segment and Geographic Report_4

Segment and Geographic Reporting - Schedule of Financial Information by Segment (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	$ 4,707,688	$ 5,160,100	$ 3,316,616
Operating income (loss)	96,121	(37,120)	414,294
Interest expense	(288,475)	(286,872)	(121,254)
Other income (expense), net	44,707	(31,566)	(11,233)
Income taxes	(11,117)	96,100	(47,048)
Net loss	(158,764)	(259,458)	234,759
Net earnings (loss) attributable to Coherent Corp.	(156,154)	(259,458)	234,759
Depreciation and amortization	559,761	681,687	286,779
Expenditures for property, plant & equipment	346,816	436,060	314,332
Segment assets	14,488,634	13,711,133	7,844,846
Goodwill	4,464,329	4,512,700	1,285,759
Networking
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	2,295,729	2,340,930	2,197,249
Goodwill	1,036,592	1,036,204	1,013,277
Materials
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	1,016,573	1,349,758	1,119,367
Goodwill	245,983	247,695	272,482
Lasers
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	1,395,386	1,469,412	0
Goodwill	3,181,754	3,228,801	0
Operating Segments \| Networking
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	2,295,729	2,340,930	2,197,249
Operating income (loss)	178,789	222,365	231,563
Interest expense	0	0	0
Other income (expense), net	0	0	0
Income taxes	0	0	0
Net loss	0
Net earnings (loss) attributable to Coherent Corp.	0	0	0
Depreciation and amortization	161,499	172,339	172,092
Expenditures for property, plant & equipment	90,950	98,192	89,616
Segment assets	3,543,981	3,316,555	4,897,252
Goodwill	1,036,592	1,036,204	1,013,277
Operating Segments \| Materials
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	1,016,573	1,349,758	1,119,367
Operating income (loss)	62,876	159,581	218,601
Interest expense	0	0	0
Other income (expense), net	0	0	0
Income taxes	0	0	0
Net loss	0
Net earnings (loss) attributable to Coherent Corp.	0	0	0
Depreciation and amortization	108,979	143,243	114,687
Expenditures for property, plant & equipment	224,482	274,434	224,716
Segment assets	3,502,642	2,561,156	2,947,594
Goodwill	245,983	247,695	272,482
Operating Segments \| Lasers
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	1,395,386	1,469,412	0
Operating income (loss)	(145,544)	(419,066)	0
Interest expense	0	0	0
Other income (expense), net	0	0	0
Income taxes	0	0	0
Net loss	0
Net earnings (loss) attributable to Coherent Corp.	0	0	0
Depreciation and amortization	289,283	366,105	0
Expenditures for property, plant & equipment	31,384	63,434	0
Segment assets	7,442,011	7,833,422	0
Goodwill	3,181,754	3,228,801	0
Inter-segment revenues
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	(508,602)	(433,817)	(366,240)
Inter-segment revenues \| Networking
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	45,767	70,120	93,660
Inter-segment revenues \| Materials
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	457,623	362,179	272,580
Inter-segment revenues \| Lasers
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	5,212	1,517	0
Unallocated & Other
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	0	0	0
Operating income (loss)	0	0	(35,870)
Interest expense	0	0	0
Other income (expense), net	0	0	0
Income taxes	0	0	0
Net loss	0
Net earnings (loss) attributable to Coherent Corp.	0	0	0
Depreciation and amortization	0	0	0
Expenditures for property, plant & equipment	0	0	0
Segment assets	0	0	0
Goodwill	$ 0	$ 0	$ 0

Segment and Geographic Report_5

Segment and Geographic Reporting - Schedule of Geographical Information for Revenues (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 4,707,688	$ 5,160,100	$ 3,316,616
North America
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	2,622,569	2,745,891	1,771,385
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	714,282	979,911	623,157
China
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	621,918	577,180	614,393
Japan
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	340,863	392,479	196,512
Rest of World
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 408,056	$ 464,639	$ 111,169

Segment and Geographic Report_6

Segment and Geographic Reporting - Schedule of Geographical Information for Long Lived Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Jun. 30, 2023
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	$ 2,069,340	$ 1,971,858
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	1,226,359	1,069,012
Non-United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	842,981	902,846
China
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	349,195	365,331
Germany
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	209,593	216,336
United Kingdom
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	19,153	77,474
Malaysia
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	87,783	70,424
Switzerland
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	44,256	47,110
Sweden
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	44,733	38,981
Korea
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	17,862	20,869
Vietnam
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	20,707	17,739
Australia
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	8,611	8,641
Taiwan
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	6,705	7,883
Philippines
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	11,217	7,205
Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	$ 23,166	$ 24,853

Fair Value of Financial Instr_3

Fair Value of Financial Instruments - Additional Information (Details) - USD ($)	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022	Feb. 28, 2023	Feb. 23, 2022	Nov. 24, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset, statement of financial position	Other assets, Prepaid and other current assets	Other assets, Prepaid and other current assets
Restricted cash	$ 864,000,000	$ 16,000,000
Realized gains (losses) on derivatives	(15,000,000)	200,000	$ (27,000,000)
Silicon Carbide
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted cash	858,000,000
Other Entities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted cash	5,000,000
Interest Rate Swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notional amount			$ 825,000,000	$ 825,000,000		$ 1,075,000,000
Fixed interest rate				1.42%		1.52%
Floor interest rate				0.10%		0%
Derivative asset	8,000,000	37,000,000
Interest Rate Cap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed interest rate					0.853%
Derivative asset	$ 50,000,000	$ 46,000,000
SOFR percentage of derivative					1.92%
Interest Rate Cap \| Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notional amount					$ 500,000,000
Interest Rate Cap \| Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notional amount					$ 1,500,000,000

Fair Value of Financial Instr_4

Fair Value of Financial Instruments - Schedule of Fair Value and Carrying Value of Debt Facilities (Details) $ in Thousands	Jun. 30, 2024 USD ($)
Fair Value \| Senior Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	$ 938,193
Fair Value \| Term A Facility
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	777,564,000
Fair Value \| Term B Facility
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	2,390,497,000
Carrying Value \| Senior Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	984,061
Carrying Value \| Term A Facility
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	762,039
Carrying Value \| Term B Facility
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	$ 2,334,701

Employee Benefit Plans - Additi

Employee Benefit Plans - Additional Information (Details) $ in Millions	12 Months Ended
	Jun. 30, 2024 USD ($) definedBenefitPlan	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)
401(k) Profit Sharing Plan
Defined Benefit Plan Disclosure [Line Items]
Employer matching contribution, percent of employee contribution	50%
Employer matching contribution, percent of employees' earnings	8%
Employer matching contribution, net of forfeitures	$ 18	$ 11	$ 10
Contributions to profit sharing retirement plan	$ 2	2	$ 2
Employee Retirement and Investment Plan
Defined Benefit Plan Disclosure [Line Items]
Employer matching contribution, percent of employees' earnings	4%
Employer matching contribution, net of forfeitures	$ 3	7
Swiss Plan
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	4	4
Pension liability	17	11
Pension adjustment	7	7
Accumulated benefit obligation	$ 106	97
German Plan
Defined Benefit Plan Disclosure [Line Items]
Number of defined benefit plans \| definedBenefitPlan	2
Acquired Plans
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	$ 2	1
Pension liability	34	32
Pension adjustment	1	(1)
Accumulated benefit obligation	$ 44	$ 42

Employee Benefit Plans - Schedu

Employee Benefit Plans - Schedule of Estimated Future Benefit Payments (Details) $ in Thousands	Jun. 30, 2024 USD ($)
Retirement Benefits [Abstract]
2025	$ 9,100
2026	7,800
2027	7,800
2028	8,500
2029	9,500
Next five years	$ 53,000

Other Accrued Liabilities (Deta

Other Accrued Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Jun. 30, 2023
Payables and Accruals [Abstract]
Contract liabilities	$ 62,123	$ 104,477
Warranty reserves	44,193	47,563
Other accrued liabilities	188,390	158,241
Other accrued liabilities	$ 294,706	$ 310,281

Commitments and Contingencies (

Commitments and Contingencies (Details) $ in Millions	Jun. 30, 2024 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Commitments, 2025	$ 697
Commitments, thereafter	$ 54

Share Repurchase Programs (Deta

Share Repurchase Programs (Details) - USD ($)	12 Months Ended		119 Months Ended
Share Repurchase Programs (Details) - USD ($)	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Aug. 31, 2014
Equity [Abstract]
Share repurchase program, authorized amount				$ 50,000,000
Purchase of common stock (in shares)	0	0	1,416,587
Purchase of common stock			$ 22,000,000

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	$ 4,987,551	$ 3,616,475	$ 3,406,170
Other comprehensive income (loss)	(109,528)	111,893	(16,434)
Reclass related to sale of shares to noncontrolling interests	840,771
Ending balance	5,581,507	4,987,551	3,616,475
Total Accumulated Other Comprehensive Income (Loss)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	109,726	(2,167)	14,267
Other comprehensive income (loss) before reclassifications	(64,077)	131,973	(30,650)
Amounts reclassified from AOCI	(45,880)	(20,080)	14,216
Other comprehensive income (loss)	(109,957)	111,893	(16,434)
Reclass related to sale of shares to noncontrolling interests	2,871
Ending balance	2,640	109,726	(2,167)
Foreign Currency Translation Adjustment
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	53,355	(34,572)	55,395
Other comprehensive income (loss) before reclassifications	(82,318)	87,927	(89,967)
Amounts reclassified from AOCI	0	0	0
Other comprehensive income (loss)	(82,318)	87,927	(89,967)
Reclass related to sale of shares to noncontrolling interests	2,871
Ending balance	(26,092)	53,355	(34,572)
Interest Rate Swap/Interest Rate Cap \| Interest Rate Swap
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	19,484	11,735	(31,773)
Other comprehensive income (loss) before reclassifications	9,529	27,050	29,711
Amounts reclassified from AOCI	(32,414)	(19,301)	13,797
Other comprehensive income (loss)	(22,885)	7,749	43,508
Reclass related to sale of shares to noncontrolling interests	0
Ending balance	(3,401)	19,484	11,735
Interest Rate Swap/Interest Rate Cap \| Interest Rate Cap
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	36,628	14,306	0
Other comprehensive income (loss) before reclassifications	15,420	22,322	14,306
Amounts reclassified from AOCI	(12,731)	0	0
Other comprehensive income (loss)	2,689	22,322	14,306
Reclass related to sale of shares to noncontrolling interests	0
Ending balance	39,317	36,628	14,306
Defined Benefit Pension Plan
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	259	6,364	(9,355)
Other comprehensive income (loss) before reclassifications	(6,708)	(5,326)	15,300
Amounts reclassified from AOCI	(735)	(779)	419
Other comprehensive income (loss)	(7,443)	(6,105)	15,719
Reclass related to sale of shares to noncontrolling interests	0
Ending balance	$ (7,184)	$ 259	$ 6,364

Restructuring Plan - Additional

Restructuring Plan - Additional Information (Details) - May 2023 Restructuring Plan - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Restructuring Cost and Reserve [Line Items]
Restructuring costs (recoveries)	$ 27,000	$ 119,000
Reimbursement arrangements		65,000
Restructuring, reimbursement receivable		50,000
Networking
Restructuring Cost and Reserve [Line Items]
Restructuring costs (recoveries)	(4,000)	56,000
Materials
Restructuring Cost and Reserve [Line Items]
Restructuring costs (recoveries)	28,000	60,000
Lasers
Restructuring Cost and Reserve [Line Items]
Restructuring costs (recoveries)	$ 4,000	3,000
Severance
Restructuring Cost and Reserve [Line Items]
Reimbursement arrangements		9,247
Restructuring accrual, current		15,000
Restructuring accrual, noncurrent		$ 37,000

Restructuring Plan - Schedule o

Restructuring Plan - Schedule of Activity and Accrual Balances for the Restructuring Plan (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022
Restructuring Reserve [Roll Forward]
Restructuring charges (recoveries)	$ 16,557	$ 119,456	$ 0
May 2023 Restructuring Plan
Restructuring Reserve [Roll Forward]
Beginning balance	64,379	0
Restructuring charges (recoveries)	27,056	184,101
Reimbursement arrangements		(65,000)
Reimbursement arrangement related accrual		9,247
Payments	(13,189)	(12,565)
Asset write-offs and other	(27,185)	(51,404)
Ending balance	51,061	64,379	0
May 2023 Restructuring Plan \| Severance
Restructuring Reserve [Roll Forward]
Beginning balance	64,379	0
Restructuring charges (recoveries)	(129)	76,944
Reimbursement arrangements		(9,247)
Reimbursement arrangement related accrual		9,247
Payments	(13,189)	(12,565)
Asset write-offs and other	0	0
Ending balance	51,061	64,379	0
May 2023 Restructuring Plan \| Asset Write-Offs
Restructuring Reserve [Roll Forward]
Beginning balance	0	0
Restructuring charges (recoveries)	11,658	107,157
Reimbursement arrangements		(55,753)
Reimbursement arrangement related accrual		0
Payments	0	0
Asset write-offs and other	(11,658)	(51,404)
Ending balance	0	0	0
May 2023 Restructuring Plan \| Other
Restructuring Reserve [Roll Forward]
Beginning balance	0	0
Restructuring charges (recoveries)	15,527	0
Reimbursement arrangements		0
Reimbursement arrangement related accrual		0
Payments	0	0
Asset write-offs and other	(15,527)	0
Ending balance	$ 0	$ 0	$ 0

SCHEDULE II (Details)

SCHEDULE II (Details) - USD ($) $ in Thousands	12 Months Ended
SCHEDULE II (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022
Allowance for doubtful accounts
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	$ 8,005	$ 4,206	$ 924
Charged to Expense	5,161	1,793	3,292
Charged to Other Accounts	0	3,112	0
Deduction from Reserves	(3,655)	(1,106)	(10)
Balance at End of Year	9,511	8,005	4,206
Warranty reserves
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	47,563	17,738	21,868
Charged to Expense	34,362	40,475	7,718
Charged to Other Accounts	0	29,196	0
Deduction from Reserves	(37,732)	(39,846)	(11,848)
Balance at End of Year	44,193	47,563	17,738
Deferred tax asset valuation allowance
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	97,180	55,420	53,765
Charged to Expense	57,968	4,035	2,157
Charged to Other Accounts	(318)	37,725	(502)
Deduction from Reserves	0	0	0
Balance at End of Year	$ 154,830	$ 97,180	$ 55,420

Uncategorized Items - iivi-2024

Label	Element	Value
Accounting Standards Update [Extensible Enumeration]	us-gaap_AccountingStandardsUpdateExtensibleList	Accounting Standards Update 2020-06 [Member]