MDU Resources (MDU) 8-KRegulation FD Disclosure

Information in this release includes certain forward-looking statements within the meaning of Section 21E of the Securities Exchange Act of 1934. The forward-looking statements in this release, including information about projections, financial guidance and the expected timing of the spinoff, are expressed in good faith and are believed by the company to have a reasonable basis. Although the company believes its expectations are based on reasonable assumptions, there is no assurance the company’s

projections, including financial guidance, will be achieved. Nonetheless, actual results may differ materially from the projected results expressed in the forward-looking statements. For a discussion of important factors that could cause actual results to differ materially, refer to Everus’ Form 10 Registration Statement and Item 1A — Risk Factors in MDU Resources' most recent Form 10-K and Form 10-Q and subsequent filings with the SEC. Changes in such factors could cause actual future results to differ materially from financial guidance. All forward-looking statements in this news release are expressly qualified by such cautionary statements and by reference to the underlying factors. Undue reliance should not be placed on forward-looking statements, which speak only as of the date they are made. Except as required by law, the company does not undertake to update forward-looking statements, whether as a result of new information, future events or otherwise.

MDU Resources Group, Inc., a member of the S&P SmallCap 600 Index, provides essential products and services through its regulated energy delivery and construction services businesses. Founded in 1924, the company is celebrating its 100th anniversary; learn more at www.mdu.com/100th-anniversary. For more information about MDU Resources, visit www.mdu.com or contact the Investor Relations Department at investor@mduresources.com.

Everus Construction Group, Inc. is Building America's Future™ by providing a full spectrum of construction services through its electrical and mechanical, and transmission and distribution specialty contracting services across the United States. These specialty contracting services are provided to utility, transportation, commercial, industrial, institutional, renewable and other customers. Its E&M contracting services include construction and maintenance of electrical and communication wiring and infrastructure, fire suppression systems, and mechanical piping and services. Its T&D contracting services include construction and maintenance of overhead and underground electrical, gas and communication infrastructure, as well as manufacturing and distribution of transmission line construction equipment and tools. For more information about Everus, visit everus.com.

Everus has provided a non-GAAP financial measure of 2024 EBITDA guidance. The company defines EBITDA from continuing operations as income (loss) from continuing operations before interest; taxes; and depreciation and amortization. The company believes this non-GAAP financial measure provides meaningful information to investors about operational efficiency compared to the company's peers by excluding the impacts of differences in tax jurisdictions and structures, debt levels and capital investment. The company's management uses the non-GAAP financial measure in conjunction with GAAP results when evaluating the company's operating results and calculating compensation packages. Non-GAAP financial measures are not standardized; therefore, it may not be possible to compare such financial measures with other companies' non-GAAP financial measures having the same or similar names. The presentation of this additional information is not meant to be considered a substitution for financial measures prepared in accordance with GAAP. The company strongly encourages investors to review the consolidated financial statements in their entirety and to not rely on any single financial measure. The following table provides a reconciliation of GAAP income from continuing operations to EBITDA for forecasted results.