Sec Form 4 Filing - QUAIN MITCHELL I @ STAR EQUITY HOLDINGS, INC. - 2021-06-15

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person QUAIN MITCHELL I 2. Issuer Name and Ticker or Trading Symbol STAR EQUITY HOLDINGS, INC. [ STRR] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) C/O STAR EQUITY HOLDINGS, INC., 53 FOREST AVENUE SUITE 101 3. Date of Earliest Transaction (MM/DD/YY) 06/15/2021 (Street) OLD GREENWICH, CT06870 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 06/15/2021( 1 ) X 11,000 A $ 2.25 39,047 I By Mitchell Quain Revoc. Liv. Trust U/A 1/25/18 ( 2 ) ( 3 ) Common Stock 16,681 D Common Stock 3,200 I By Industrial Manufacturing Institute, LLC ( 4 ) Common Stock 300 I By IRA Common Stock 300 I By Family Trust Partnership, LLC ( 5 )

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Titl e and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Warrant $ 2.25 06/15/2021( 1 ) X 22,000 05/28/2020 05/28/2025 Common Stock 11,000 ( 6 ) 0 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other QUAIN MITCHELL I C/O STAR EQUITY HOLDINGS, INC. 53 FOREST AVENUE SUITE 101 OLD GREENWICH, CT06870 X Signatures /s/ David Noble, as Attorney-in-Fact 06/25/2021 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Warrants were exercised on June 15, 2021, but confirmation of execution and settlement was provided to Mr. Quain by his broker on June 22, 2021. ( 2 )Shares owned directly by the Mitchell Quain Revoc. Liv. Trust U/A 1/25/18, an entity of which Mr. Quain is the trustee. ( 3 )Includes 28,047 shares of Common Stock previously held directly by Mr. Quain, and which are now held indirectly by Mr. Quain, as the trustee of the Mitchell Quain Revoc. Liv. Trust U/A 1/25/18, as a result of a change in the form of beneficial ownership of such shares. ( 4 )Shares owned directly by Industrial Manufacturing Institute, LLC, an entity of which Mr. Quain is the sole beneficial owner. ( 5 )Shares owned directly by Family Trust Partnership, LLC, an entity of which Mr. Quain is the sole beneficial owner. ( 6 )As previously reported, Mr. Quain purchased warrants directly from the underwriter in an underwritten public offering conducted by the Issuer that closed on May 28, 2020, with a price per warrant of $0.01.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

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