8-K

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 26, 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 8.01. OTHER EVENTS.

On June 29, 2026, Star Equity Holdings, Inc. (the "Company") issued a press release announcing that the Company’s common stock has been added to the Russell Microcap Index following the 2026 Russell indexes reconstitution, which became effective after the U.S. market close on June 26, 2026.

A copy of the press release is attached to this Current Report on Form 8-K as Exhibit 99.1 and is incorporated herein by reference. 

ITEM 9.01. FINANCIAL STATEMENTS AND EXHIBITS.

(d) Exhibits

The exhibit listed in the following Exhibit Index is provided as part of the information furnished under Item 2.02 of this Current Report on Form 8-K:

EXHIBIT INDEX

99.1	Press Release of Star Equity Holdings, Inc. dated June 29, 2026
104	Cover Page Interactive Data File (embedded within the Inline XBRL document)

1

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 29, 2026

2

EX-99.1

Star Equity Holdings Added to the Russell Microcap® Index June 29, 2026 OLD GREENWICH, Conn., June 29, 2026 (GLOBE NEWSWIRE) -- Star Equity Holdings, Inc. (Nasdaq: STRR and STRRP) ("Star" or the "Company"), a diversified holding company, announced today the Company’s common stock has been added to the Russell Microcap ® Index following the 2026 Russell indexes reconstitution, which became effective after US market close on June 26, 2026. The reconstitution of the Russell U.S. Indexes captures the 4,000 largest U.S. stocks as of April 30, 2026, ranked by total market capitalization. The Russell Microcap® Index measures the performance of the microcap segment of the U.S. equity market and is used by institutional investors and investment managers as a benchmark for microcap equities. Jeff Eberwein, CEO of Star, commented, “We are pleased to join the Russell Microcap ® Index, a meaningful milestone that reflects our progress in building a diversified platform for long-term shareholder value creation. Inclusion in this benchmark expands our visibility within the institutional investment community and introduces our stock to additional microcap investors seeking fundamentally driven, value-oriented opportunities. We believe this recognition will further broaden awareness as we continue executing on our strategy.” About Star Equity Holdings, Inc.  Star Equity Holdings, Inc. is a diversified holding company that seeks to build long-term shareholder value by acquiring, managing, and growing businesses with strong fundamentals and market opportunities. Its current structure comprises four segments: Building Solutions, Business Services, Energy Services, and Investments. For more information visit www.starequity.com. Building Solutions The Building Solutions division operates in three specialties: (i) modular building manufacturing; (ii) structural wall panel and wood foundation manufacturing, including building supply distribution operations; and (iii) glue-laminated timber (glulam) column, beam, and truss manufacturing. Business Services The Business Services division provides flexible and scalable recruitment solutions to a global clientele, servicing organizations at all levels, from entry-level positions to the C-suite. The division focuses on mid-market and enterprise organizations worldwide, partnering consultatively with talent acquisition, HR, and procurement leaders to build diverse, high-impact teams and drive business success. Energy Services The Energy Services division engages in the rental, sale, and repair of downhole tools used in the oil and gas, geothermal, mining, and water-well industries. Investments The Investments division manages and finances the Company’s real estate assets as well as its investment positions in private and public companies. About FTSE Russell, an LSEG Business FTSE Russell is a global index leader that provides innovative benchmarking, analytics and data solutions for investors worldwide. FTSE Russell calculates thousands of indexes that measure and benchmark markets and asset classes in more than 70 countries, covering 98% of the investable market globally.  FTSE Russell index expertise and products are used extensively by institutional and retail investors globally. Approximately $21.20 trillion is benchmarked to FTSE Russell indexes. Leading asset owners, asset managers, ETF providers and investment banks choose FTSE Russell indexes to benchmark their investment performance and create ETFs, structured products and index-based derivatives. A core set of universal principles guides FTSE Russell index design and management: a transparent rules-based methodology is informed by independent committees of leading market participants. FTSE Russell is focused on applying the highest industry standards in index design and governance and embraces the IOSCO Principles. FTSE Russell is also focused on index innovation and customer partnerships as it seeks to enhance the breadth, depth and reach of its offering. FTSE Russell is wholly owned by LSEG.  For more information, visit FTSE Russell. For more information contact: The Equity Group Lena Cati Senior Vice President 212-836-9611 Lena.cati@theequitygroup.com

XML

Cover	Jun. 26, 2026
Entity Information [Line Items]
Document Type	8-K
Document Period End Date	Jun. 26, 2026
Entity Registrant Name	Star Equity Holdings, Inc.
Entity Incorporation, State or Country Code	DE
Entity File Number	001-38704
Entity Tax Identification Number	59-3547281
Entity Address, Address Line One	53 Forest Avenue
Entity Address, Address Line Two	Suite 101
Entity Address, City or Town	Old Greenwich
Entity Address, State or Province	CT
Entity Address, Postal Zip Code	06870
City Area Code	203
Local Phone Number	489-9500
Written Communications	false
Soliciting Material	false
Pre-commencement Tender Offer	false
Pre-commencement Issuer Tender Offer	false
Entity Emerging Growth Company	false
Entity Central Index Key	0001210708
Amendment Flag	false
Common Stock | The NASDAQ Stock Market LLC
Entity Information [Line Items]
Title of 12(b) Security	Common Stock, $0.001 par value
Trading Symbol	STRR
Security Exchange Name	NASDAQ
Preferred Share Purchase Rights
Entity Information [Line Items]
Title of 12(b) Security	Preferred Share Purchase Rights
No Trading Symbol Flag	true
Series A Preferred Stock | The NASDAQ Stock Market LLC
Entity Information [Line Items]
Title of 12(b) Security	Series A Preferred Stock, $0.001 par value
Trading Symbol	STRRP
Security Exchange Name	NASDAQ