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Star Equity Holdings, Inc. (STRR) is the issuer in an amended Schedule 13G reporting beneficial ownership by Mink Brook Partners LP, Mink Brook Opportunity Fund LP, Mink Brook Capital GP LLC, William Mueller, and Mink Brook Asset Management LLC. Mink Brook Partners LP reported 218,136 shares (5.91%), and Mink Brook Opportunity Fund LP reported 98,003 shares (2.66%). Mink Brook Capital GP LLC, William Mueller, and Mink Brook Asset Management LLC each reported shared voting and dispositive power over 316,139 shares (8.57%). The reported securities are directly owned by advisory clients of Mink Brook Asset Management LLC; only Mink Brook Partners LP among those clients may be deemed to beneficially own more than 5%. The percentages use 3,689,403 shares outstanding as of August 14, 2026. Each reporting person disclaims beneficial ownership except to the extent of pecuniary interest.
Key Figures
Mink Brook Partners LP beneficial ownership:218,136 shares; 5.91%Mink Brook Opportunity Fund LP beneficial ownership:98,003 shares; 2.66%Shared voting and dispositive power:316,139 shares; 8.57%+1 more
Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.
shared voting powerfinancial
"Shared Voting Power 316,139.00"
Shared voting power occurs when two or more parties jointly have the right to vote or decide how a block of company shares is cast, like co-owners who must agree before moving a piece of furniture. Investors care because who controls voting rights affects board elections, major corporate decisions and takeover outcomes, and shared control can alter regulatory disclosures and the practical influence any holder has over a company’s direction and value.
shared dispositive powerfinancial
"Shared Dispositive Power 316,139.00"
pecuniary interestfinancial
"except to the extent of his, her or its pecuniary interest therein"
FAQ
AI-generated questions and answers. How Rhea-AI works. Not financial advice.
How many STRR shares did Mink Brook Partners LP report?
Mink Brook Partners LP reported beneficial ownership of 218,136 shares, or 5.91% of Star Equity Holdings, Inc.'s common stock.
Who directly owns the shares reported by Mink Brook?
The reported securities are directly owned by advisory clients of Mink Brook Asset Management LLC. The statement says that, among those clients, only Mink Brook Partners LP may be deemed to beneficially own more than 5% of the common stock.
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
UNDER THE SECURITIES EXCHANGE ACT OF 1934
(Amendment No. 4)
Star Equity Holdings, Inc.
(Name of Issuer)
Common Stock
(Title of Class of Securities)
443787205
(CUSIP Number)
09/30/2026
(Date of Event Which Requires Filing of this Statement)
Check the appropriate box to designate the rule pursuant to which this Schedule is filed:
Rule 13d-1(b)
Rule 13d-1(c)
Rule 13d-1(d)
schemaVersion:
SCHEDULE 13G
CUSIP Number(s):
443787205
1
Names of Reporting Persons
Mink Brook Partners LP
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
3
Sec Use Only
4
Citizenship or Place of Organization
DELAWARE
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
218,136.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
218,136.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
218,136.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
5.9 %
12
Type of Reporting Person (See Instructions)
PN
Comment for Type of Reporting Person: This percentage is calculated based upon 3,689,403 shares of Common Stock outstanding as of 8/14/26 disclosed in Star Equity Holdings, Inc.'s recent 10-Q.
SCHEDULE 13G
CUSIP Number(s):
443787205
1
Names of Reporting Persons
Mink Brook Opportunity Fund LP
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
3
Sec Use Only
4
Citizenship or Place of Organization
DELAWARE
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
98,003.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
98,003.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
98,003.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
2.7 %
12
Type of Reporting Person (See Instructions)
PN
Comment for Type of Reporting Person: This percentage is calculated based upon 3,689,403 shares of Common Stock outstanding as of 8/14/26 disclosed in Star Equity Holdings, Inc.'s recent 10-Q.
SCHEDULE 13G
CUSIP Number(s):
443787205
1
Names of Reporting Persons
Mink Brook Capital GP LLC
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
3
Sec Use Only
4
Citizenship or Place of Organization
DELAWARE
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
316,139.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
316,139.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
316,139.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
8.6 %
12
Type of Reporting Person (See Instructions)
OO
Comment for Type of Reporting Person: This percentage is calculated based upon 3,689,403 shares of Common Stock outstanding as of 8/14/26 disclosed in Star Equity Holdings, Inc.'s recent 10-Q.
SCHEDULE 13G
CUSIP Number(s):
443787205
1
Names of Reporting Persons
William Mueller
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
3
Sec Use Only
4
Citizenship or Place of Organization
UNITED STATES
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
316,139.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
316,139.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
316,139.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
8.6 %
12
Type of Reporting Person (See Instructions)
HC, IN
Comment for Type of Reporting Person: This percentage is calculated based upon 3,689,403 shares of Common Stock outstanding as of 8/14/26 disclosed in Star Equity Holdings, Inc.'s recent 10-Q.
SCHEDULE 13G
CUSIP Number(s):
443787205
1
Names of Reporting Persons
Mink Brook Asset Management LLC
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
3
Sec Use Only
4
Citizenship or Place of Organization
DELAWARE
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
316,139.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
316,139.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
316,139.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
8.6 %
12
Type of Reporting Person (See Instructions)
IA
Comment for Type of Reporting Person: This percentage is calculated based upon 3,689,403 shares of Common Stock outstanding as of 8/14/26 disclosed in Star Equity Holdings, Inc.'s recent 10-Q.
SCHEDULE 13G
Item 1.
(a)
Name of issuer:
Star Equity Holdings, Inc.
(b)
Address of issuer's principal executive offices:
53 FOREST AVENUE, OLD GREENWICH, CONNECTICUT, 06870.
Item 2.
(a)
Name of person filing:
Mink Brook Partners LP
Mink Brook Opportunity Fund LP
Mink Brook Capital GP LLC
William Mueller
Mink Brook Asset Management LLC
(b)
Address or principal business office or, if none, residence:
Mink Brook Partners LP
201 Summa Street
West Palm Beach, FL 33405
Mink Brook Opportunity Fund LP
201 Summa Street
West Palm Beach, FL 33405
Mink Brook Capital GP LLC
201 Summa Street
West Palm Beach, FL 33405
William Mueller
c/o Mink Brook Asset Management LLC
201 Summa Street
West Palm Beach, FL 33405
Mink Brook Asset Management LLC
201 Summa Street
West Palm Beach, FL 33405
(c)
Citizenship:
Mink Brook Partners LP - Delaware
Mink Brook Opportunity Fund LP - Delaware
Mink Brook Capital GP LLC - Delaware
William Mueller - United States
Mink Brook Asset Management LLC - Delaware
(d)
Title of class of securities:
Common Stock
(e)
CUSIP No.:
443787205
Item 3.
If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)
Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)
Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)
Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)
Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)
An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)
An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)
A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)
A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)
A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)
A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J),
please specify the type of institution:
(k)
Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.
Ownership
(a)
Amount beneficially owned:
Mink Brook Partners LP - 218,136
Mink Brook Opportunity Fund LP - 98,003
Mink Brook Capital GP LLC - 316,139
William Mueller - 316,139
Mink Brook Asset Management LLC - 316,139
(b)
Percent of class:
Mink Brook Partners LP - 5.91%
Mink Brook Opportunity Fund LP - 2.66%
Mink Brook Capital GP LLC - 8.57%
William Mueller - 8.57%
Mink Brook Asset Management LLC - 8.57%
(c)
Number of shares as to which the person has:
(i) Sole power to vote or to direct the vote:
Mink Brook Partners LP - 0
Mink Brook Opportunity Fund LP - 0
Mink Brook Capital GP LLC - 0
William Mueller - 0
Mink Brook Asset Management LLC - 0
(ii) Shared power to vote or to direct the vote:
Mink Brook Partners LP - 218,136
Mink Brook Opportunity Fund LP - 98,003
Mink Brook Capital GP LLC - 316,139
William Mueller - 316,139
Mink Brook Asset Management LLC - 316,139
(iii) Sole power to dispose or to direct the disposition of:
Mink Brook Partners LP - 0
Mink Brook Opportunity Fund LP - 0
Mink Brook Capital GP LLC - 0
William Mueller - 0
Mink Brook Asset Management LLC - 0
(iv) Shared power to dispose or to direct the disposition of:
Mink Brook Partners LP - 218,136
Mink Brook Opportunity Fund LP - 98,003
Mink Brook Capital GP LLC - 316,139
William Mueller - 316,139
Mink Brook Asset Management LLC - 316,139
Item 5.
Ownership of 5 Percent or Less of a Class.
Not Applicable
Item 6.
Ownership of more than 5 Percent on Behalf of Another Person.
If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required.
All of the securities reported in this Schedule 13G Amendment No. 5 are directly owned by advisory clients of Mink Brook Asset Management LLC. None of those advisory clients, other than Mink Brook Partners LP, may be deemed to beneficially own more than 5% of the Common Stock.
Item 7.
Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
Not Applicable
Item 8.
Identification and Classification of Members of the Group.
Not Applicable
Item 9.
Notice of Dissolution of Group.
Not Applicable
Item 10.
Certifications:
By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11.
SIGNATURE
After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.
Mink Brook Partners LP
Signature:
/s/ William Mueller
Name/Title:
Managing Member of its general partner, Mink Brook Capital GP LLC
Date:
10/28/2026
Mink Brook Opportunity Fund LP
Signature:
/s/ William Mueller
Name/Title:
Mink Brook Opportunity Fund LP
Date:
10/28/2026
Mink Brook Capital GP LLC
Signature:
/s/ William Mueller
Name/Title:
Managing Member Mink Brook Capital GP LLC
Date:
10/28/2026
William Mueller
Signature:
/s/ William Mueller
Name/Title:
Managing Member
Date:
10/28/2026
Mink Brook Asset Management LLC
Signature:
/s/ William Mueller
Name/Title:
Managing Member of its general partner, Mink Brook Capital GP LLC
Date:
10/28/2026
Comments accompanying signature: Each Reporting Person disclaims beneficial ownership of the reported securities except to the extent of his, her or its pecuniary interest therein, and this report shall not be deemed an admission that such Reporting Person is the beneficial owner of the securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose.
The original statement shall be signed by each person on whose behalf the statement is filed or his authorized representative. If the statement is signed on behalf of a person by his authorized representative (other than an executive officer or general partner of this filing person), evidence of the representative's authority to sign on behalf of such person shall be filed with the statement, provided, however, that a power of attorney for this purpose which is already on file with the Commission may be incorporated by reference. The name and any title of each person who signs the statement shall be typed or printed beneath his signature.
Attention: Intentional misstatements or omissions of fact constitute Federal criminal violations (See 18 U.S.C. 1001).
