GigAcquisitions5 SC 13DQT IMAGING / GigAcquisitions5 ownership change

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13D

Under the Securities Exchange Act of 1934

(Amendment No. )*

QT Imaging Holdings, Inc.

(Name of Issuer)

Common Stock, $0.0001 par value

(Title of Class of Securities)

746962 109

(CUSIP Number)

Jeffrey C. Selman

DLA Piper LLP (US)

555 Mission Street, Suite 2400

San Francisco, CA 94105-2933

(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)

March 4, 2024

(Date of Event which Requires Filing of this Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§240.13d- l(e), 240.13d-l(f) or 240.13d- l(g), check the following box. ☐

The information required on the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act.

CUSIP No. 746962 109

Note: All share numbers on these cover pages are presented as shares of Common Stock, $0.0001 par value (the “Common Stock”) of QT Imaging Holdings, Inc., a Delaware corporation (the “Issuer”), as further described herein.

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CUSIP No. 746962 109

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Item 1. Security and Issuer

This Schedule 13D relates to shares of Common Stock, $0.0001 par value (the “Common Stock”) of QT Imaging Holdings, Inc., a Delaware corporation (the “Issuer”). The address of the Issuer’s principal executive offices is 3 Hamilton Landing, Suite 160, Novato, CA 94949.

Item 2. Identity and Background

Item 3. Source and Amount of Funds or Other Consideration

Prior to the initial public offering of GigCapital5, Inc. (“GigCapital5”), a Delaware corporation (now named QT Imaging Holdings, Inc. following the closing of the business combination and the Issuer), GigAcquisitions5 purchased 10,047,500 shares of Common Stock for an aggregate purchase price of $25,000, or approximately $0.002488 per share (the “Founder Shares”). On February 12, 2021, in connection with its initial public offering, GigAcquisitions5 surrendered 4,312,500 Founder Shares for no consideration, resulting in GigAcquisitions5 holding 5,735,000 Founder Shares. In connection with such initial public offering, GigAcquisitions5 purchased 795,000 units (the “Private Units”) at a purchase price of $10.00 per Private Unit with each such unit consisting of one share of Common Stock and one of one warrant. Each whole warrant (a “Private Warrant”) is exercisable for one share of Common Stock at a price of $11.50 per full share. GigAcquisitions5 obtained the funds to purchase the Founder Shares and the Private Units from its working capital. On March 4, 2024, in connection with the closing of the Issuer’s business combination, GigAcquisitions5 elected to partially convert $943,640 in principal balance outstanding under a convertible Working Capital Note into 94,364 shares of Common Stock and 94,364 Private Warrants pursuant to the terms of such convertible Working Capital Note.

Item 4. Purpose of Transaction

Business Combination

On March 4, 2024, the Issuer announced the consummation of its business combination (the “Business Combination”) with QT Imaging, Inc. (“QT Imaging”) on March 4, 2024, pursuant to that certain Business Combination Agreement, dated as of December 8, 2022, by and among GigCapital5, QT Merger Sub, Inc. (“Merger Sub”), and QT Imaging (the “Business Combination Agreement”) following the approval at the annual meeting of the stockholders of GigCapital5 held on February 20, 2024 (the “Annual Meeting”). In connection with the consummation of the Business Combination, the registrant changed its name from GigCapital5, Inc. to QT Imaging Holdings, Inc. on March 4, 2024.

This summary is qualified in its entirety by reference to the text of the Business Combination Agreement, as amended, which is attached hereto as Exhibit 7.1, Exhibit 7.2, Exhibit 7.3, Exhibit 7.4, Exhibit 7.5 and Exhibit 7.6, and incorporated by reference.

Registration Rights Agreement

On September 23, 2021, GigCapital5 entered into a Registration Rights Agreement with GigAcquisitions5 and other stockholders of GigCapital5. These holders will be entitled to make up to two demands, excluding short form registration demands, that the Issuer register all of the shares of the Common Stock, as well as the Private Warrants, and the shares of the Common Stock issued or issuable upon the exercise of any Private Warrants, for sale under the Securities Act of 1933, as amended. In addition, these holders will have “piggy-back” registration rights to include their securities in other registration statements filed by the Issuer. The Issuer will bear the expenses incurred in connection with the filing of any such registration statements. There will be no penalties associated with delays in registering the securities under such registration rights agreement. This summary is qualified in its entirety by reference to the text of the Registration Rights Agreement, which is included as Exhibit 7.7 and incorporated by reference.

General

The Reporting Persons acquired the securities described in this Schedule 13D for investment purposes and intend to review their investments in the Issuer on a continuing basis. Any actions the Reporting Persons might undertake may be made at any time and from time to time without prior notice and will be dependent upon the Reporting Persons’ review of numerous factors, including, but not limited to: an ongoing evaluation of the Issuer’s business, financial condition, operations and prospects; price levels of the Issuer’s securities; general market, industry and economic conditions; the relative attractiveness of alternative business and investment opportunities; and other future developments.

Subject to the terms of the Registration Rights Agreement, the Reporting Persons may acquire additional securities of the Issuer, or retain or sell all or a portion of the securities then held, in the open market or in privately negotiated transactions. In addition, the Reporting Persons may engage in discussions with management, the Board, and securityholders of the Issuer and other relevant parties or encourage, cause or seek to cause the Issuer or such persons to consider or explore extraordinary corporate transactions, such as: a merger, reorganization or other transaction that could result in the de-listing or de-registration of the Common Stock; sales or acquisitions of assets or businesses; changes to the capitalization or distribution policy of the Issuer; or other material changes to the Issuer’s business or corporate structure, including changes in management or the composition of the Board. There can be no assurance, however, that any Reporting Person will propose such a transaction, that any proposed transaction would receive the requisite approvals from the respective governing bodies, as applicable, or that any such transaction would be successfully implemented.

Except as disclosed in this Item 4, the Reporting Persons do not have any current plans or proposals that relate to or would result in any of the events described in clauses (a) through (j) of the instructions to Item 4 of Schedule 13D. The Reporting Persons, however, will take such actions with respect to the Reporting Persons’ investments in the Issuer as deemed appropriate in light of existing circumstances from time to time and reserve the right to acquire or dispose of securities of the Issuer, to enter into hedging relationships with respect to such securities, or to formulate other purposes, plans, or proposals in the future depending on market conditions and/or other factors.

Item 5. Interest in Securities of the Issuer

(a) and (b)

The following sets forth, as of the date of this Schedule 13D, the aggregate number of shares of Common Stock and percentage of Common Stock beneficially owned by each of the Reporting Persons, as well as the number of shares of Common Stock as to which each Reporting Person has the sole power to vote or to direct the vote, shared power to vote or to direct the vote, sole power to dispose or to direct the disposition of, or shared power to dispose or to direct the disposition of, as of the date hereof, based on 21,437,216 shares of Common Stock outstanding as of March 4, 2024 following the closing of the Business Combination:

Item 6. Contracts, Arrangements, Understandings or Relationships with Respect to Securities of the Issuer

Item 4 above summarizes certain provisions of the Business Combination Agreement and the Registration Rights Agreement and is incorporated herein by reference. Copies of such agreements are attached as an exhibit to this Schedule 13D, and each is incorporated herein by reference.

Except as set forth herein, none of the Reporting Persons has any contracts, arrangements, understandings or relationships (legal or otherwise) with any person with respect to any securities of the Issuer, including but not limited to any contracts, arrangements, understandings or relationships concerning the transfer or voting of such securities, finder’s fees, joint ventures, loan or option arrangements, puts or calls, guarantees of profits, division of profits or losses, or the giving or withholding of proxies.

Item 7. Material to Be Filed as Exhibits

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, each of the undersigned certifies that the information set forth in the Statement is true, complete and correct.

EXHIBIT INDEX