Star Equity CAO has 763 shares withheld for taxes

Star Equity Holdings, Inc. Chief Accounting Officer Matthew K. Diamond reported a routine tax-withholding transaction related to equity compensation.

Rhea-AI Filing Summary

Star Equity Holdings, Inc. Chief Accounting Officer Matthew K. Diamond reported a routine tax-withholding transaction related to equity compensation. On May 29, 2026, the company withheld 763 shares of Common Stock at $11.62 per share to cover taxes due on the vesting of performance-based restricted stock units.

After this withholding, Diamond’s reported direct position totals 20,175 shares, consisting of 4,813 Share Units credited under the 2009 Incentive Plan and 15,362 shares of common stock. This was not an open-market sale but a non-discretionary tax settlement.

Insider Trade Summary

Exercise Price or Tax Liability: 763 shares

Exercise Price or Tax Liability 1 txn

Insider Diamond Matthew K

Role Chief Accounting Officer

Type	Security	Shares	Price	Value
Exercise Price or Tax Liability	Common Stock	763	$11.62	$9K

Holdings After Transaction: Common Stock — 20,175 shares (Direct)

Footnotes (2)

1. F1. This number represents shares of Star Equity Holdings, Inc. Common Stock withheld to satisfy the tax withholding obligation due upon vesting of performance-based restricted stock units.
2. F2. Includes (i) 4,813 Share Units credited to the Reporting Person's account under the Issuer's 2009 Incentive Plan ("2009 Plan"); and (ii) 15,362 shares of common stock. Each Share Unit is the economic equivalent of one share of Common Stock. Share Units may be settled pursuant to the 2009 Plan by the issuance of Common Stock, the payment of cash, or a combination of both.

Key Figures

Shares withheld for taxes: 763 shares Tax withholding price: $11.62 per share Total shares after transaction: 20,175 shares +2 more

5 metrics

Shares withheld for taxes 763 shares Common Stock withheld on May 29, 2026 for tax obligations

Tax withholding price $11.62 per share Value used for 763 withheld shares of Common Stock

Total shares after transaction 20,175 shares Direct holdings reported following tax-withholding disposition

Share Units under 2009 Plan 4,813 Share Units Credited to Diamond’s account under the 2009 Incentive Plan

Common stock held 15,362 shares Star Equity common stock directly held after the transaction

Key Terms

performance-based restricted stock units, Share Units, 2009 Incentive Plan, economic equivalent

4 terms

performance-based restricted stock units financial

"tax withholding obligation due upon vesting of performance-based restricted stock units"

Performance-based restricted stock units are a type of employee equity award that converts into company shares only if predefined financial or operational targets are met over a set period. Think of it like a bonus check that becomes stock only when specific goals are hit; it ties pay to results, aligning managers’ incentives with shareholders. Investors care because these awards affect future share count, executive incentives, and signal how management’s success will be measured and rewarded.

Share Units financial

"Includes (i) 4,813 Share Units credited to the Reporting Person's account"

2009 Incentive Plan financial

"credited to the Reporting Person's account under the Issuer's 2009 Incentive Plan"

economic equivalent financial

"Each Share Unit is the economic equivalent of one share of Common Stock"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did Star Equity (STRR) report for Matthew K. Diamond?

Star Equity reported a non-discretionary tax-withholding transaction for Matthew K. Diamond. The company withheld shares of common stock to satisfy tax obligations triggered by vesting performance-based restricted stock units, rather than an open-market buy or sell decision by the executive.

How many Star Equity (STRR) shares were withheld for Matthew Diamond’s taxes?

The company withheld 763 shares of Star Equity common stock for Matthew Diamond’s tax obligations. The withholding price was $11.62 per share and related specifically to the vesting of performance-based restricted stock units granted as part of his compensation package.

Was Matthew Diamond’s Star Equity (STRR) Form 4 an open-market sale?

No, the Form 4 did not report an open-market sale. It showed a tax-withholding disposition, where 763 shares were retained by the company to cover taxes due on vesting performance-based restricted stock units, a common administrative step in equity compensation plans.

How many Star Equity (STRR) shares does Matthew Diamond hold after the transaction?

After the tax-withholding transaction, Matthew Diamond holds 20,175 shares in total. This includes 4,813 Share Units credited under the 2009 Incentive Plan and 15,362 shares of common stock, as reported in the filing’s ownership footnote disclosure.

What are Share Units under Star Equity’s 2009 Incentive Plan (STRR)?

Share Units are awards economically equivalent to one share of Star Equity common stock. Under the 2009 Incentive Plan, each Share Unit may be settled in common stock, cash, or a combination, giving flexibility in how the company delivers the value of these incentives.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 06/01/2026 - 04:06 PM Learn about SEC filing dates

SEC Form 4

FORM 4

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
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Diamond Matthew K

(Last) (First) (Middle)

C/O STAR EQUITY HOLDINGS, INC.

53 FOREST AVENUE, SUITE 101

(Street)

OLD GREENWICH CONNECTICUT 06870

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Star Equity Holdings, Inc. [ STRR ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Accounting Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/29/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	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	05/29/2026		F		763(1)	D	$11.62	20,175(2)	D

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 (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	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 (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (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: 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

Explanation of Responses:

1. This number represents shares of Star Equity Holdings, Inc. Common Stock withheld to satisfy the tax withholding obligation due upon vesting of performance-based restricted stock units.

2. Includes (i) 4,813 Share Units credited to the Reporting Person's account under the Issuer's 2009 Incentive Plan ("2009 Plan"); and (ii) 15,362 shares of common stock. Each Share Unit is the economic equivalent of one share of Common Stock. Share Units may be settled pursuant to the 2009 Plan by the issuance of Common Stock, the payment of cash, or a combination of both.

Remarks:

	/s/ Matthew K. Diamond	06/01/2026
	** Signature of Reporting Person	Date
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).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)