FORM 10-Q QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 or TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period fromto Commission file number: 001-38704 STAR EQUITY HOLDINGS, INC.(Exact name of registrant as specified in its charter) 59-3547281 53 Forest Avenue, Suite 101, Old Greenwich, CT 06870(Address of principal executive offices) (Zip Code)(203)489-9500(Registrant’s telephone number, including area code) Indicate by check mark whether the registrant (1)has filed all reports required to be filed by Section13 or 15(d) of the Securities Exchange Actof 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2)has been subject tosuch filing requirements for the past 90 days.Yes☒No☐ Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submitsuch files). Yes☒No☐ Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reportingcompany, or an emerging growth company. See definition of“large accelerated filer”,“accelerated filer”,“smaller reporting company”and“emerginggrowth company”in Rule 12b-2 of the Exchange Act. Acceleratedfiler☐Smallerreportingcompany☒Emerging growth company☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complyingwith any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.☐ Indicate by checkmark whether the registrant is a shell company (as defined in Rule12b-2 of the Exchange Act).Yes☐No☒ Indicate the number of shares outstanding of each of the issuer’s classes of common stock, as of the latest practicable date. STAR EQUITY HOLDINGS, INC.INDEX PagePART I – FINANCIAL INFORMATIONItem1.Financial Statements (Unaudited)Condensed Consolidated Statements of Operations - Three Months Ended March 31, 2026 and 20251Condensed Consolidated Statements of Other Comprehensive Income (Loss) - Three Months Ended March31, 2026 and 20252Condensed Consolidated Balance Sheets – March 31, 2026and December 31, 20253Condensed Consolidated Statements of Cash Flows - Three Months Ended March 31, 2026 and 20254Condensed Consolidated Statements of Stockholders’ Equity – Three Months Ended March 31, 2026 and20255Notes to Condensed Consolidated Financial Statements6Item2.Management’s Discussion and Analysis of Financial Condition and Results ofOperations39Item3.Quantitative and Qualitative Disclosures about Market Risk53Item4.Controls and Procedures53PARTII – OTHER INFORMATIONItem1.Legal Proceedings54Item1A.Risk Factors54Item2.Unregistered Sales of Equity Securities and Use of Proceeds54Item3.Defaults Upon Senior Securities55Item4.Mine Safety Disclosures55Item5.Other Information55Item6.Exhibits55Exhibit Index55Signatures56 PART I – FINANCIAL INFORMATION STAR EQUITY HOLDINGS, INC.CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS(in thousands, except per share amounts)(unaudited) STAR EQUITY HOLDINGS, INC.CONDENSED CONSOLIDATED STATEMENTS OF OTHER COMPREHENSIVE LOSS(in thousands, except per share amounts)(unaudited) STAR EQUITY HOLDINGS, INC.CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY(in thousands)(unaudited) STAR EQUITY HOLDINGS, INC.NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS(in thousands, except share and per share amounts)(unaudited) NOTE 1 – BASIS OF PRESENTATION These interim unaudited condensed consolidated financial statements have been prepared in accordance with United States ofAmerica (“U.S.”) generally accepted accounting principles (“U.S. GAAP”) for interim financial information and with the instructionsto Form 10-Q and Article 8 of Regulation S-X of the U.S. Securities and Exchange Commission (“SEC”) for interim financial reportingand should be read in conjunction with the consolidated financial statements and related notes of Star Equity Holdings, Inc. and itssubsidiaries (the “Company”) filed in their respective Annual Reports on Form 10-K for the year ended December31, 2025. The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions thataffect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities, and the reported amounts ofoperating revenues and expenses. These estimates are based on management’s knowledge and judgments. In the opinion ofmanagement, all adjustments (consisting of normal recurring adjustments) considered necessary for a fair presentation of theCompany’s financial position, results of operations, and cash flows at the dates an