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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM 8-K

CURRENT REPORT
Pursuant to Section 13 or 15(d) of the
Securities Exchange Act of 1934
Date of Report (Date of earliest event reported): June 1, 2026

Star Equity Holdings, Inc.
(Exact name of registrant as specified in charter)

Delaware |  | 001-38704 |  | 59-3547281
(State or other jurisdiction of incorporation) |  | (Commission File Number) |  | (I.R.S. Employer Identification No.)

53 Forest Avenue, Suite 101
Old Greenwich, CT 06870
(Address of Principal Executive Offices)
Registrant's telephone number, including area code (203) 489-9500
N/A
(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

o | Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

o | Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

o | Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

o | Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)

Securities registered pursuant to Section 12(b) of the Act:

Title of each class | Trading Symbol(s) | Name of each exchange on which registered
Common Stock, $0.001 par value | STRR | The NASDAQ Stock Market LLC
Series A Preferred Stock, $0.001 par value | STRRP | The NASDAQ Stock Market LLC
Preferred Share Purchase Rights |  |

Indicate by check mark whether the Registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).
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 complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

ITEM 7.01. | REGULATION FD DISCLOSURE.

Pursuant to Regulation FD, Star Equity Holdings, Inc. (the “Company”) hereby furnishes the investor presentation (the "Investor Presentation") relating to the Company’s business and operations as of March 31, 2026, which the Company made available on June 1, 2026, within the Investor Relations section of the Company’s website: www.starequity.com.
The information contained in the Investor Presentation is summary information that should be considered in the context of the Company’s filings with the Securities and Exchange Commission and other public announcements the Company may make by press release or otherwise from time to time. The Investor Presentation speaks as of the date of this report, and in accordance with the dates provided therein. While the Company may elect to update the Investor Presentation in the future to reflect events and circumstances occurring or existing after the date of this report, the Company specifically disclaims any obligation to do so.
A copy of the Investor Presentation is furnished herewith as Exhibits 99.1. The information furnished by the Company pursuant to this Item 7.01, including Exhibits 99.1, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liability of that section, and shall not be deemed to be incorporated by reference into any Company filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such filing.

Item 9.01. | Financial Statements and Exhibits.

(d) Exhibits
EXHIBIT INDEX

99.1 | Investor Presentation, dated June 1, 2026
104 | Cover Page Interactive Data File (embedded within the Inline XBRL document)

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SIGNATURES
Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this Report to be signed on its behalf by the undersigned hereunto duly authorized.

STAR EQUITY HOLDINGS, INC. (Registrant)
By: | /s/ MATTHEW K. DIAMOND
| Matthew K. Diamond
| Chief Accounting Officer
| Dated: | June 1, 2026

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