Form 4 for STRR Star Equity Holdings, Inc.

Accepted 2026-03-23 00:00:00 ET · period of report 2026-03-19 · accession 0001779155-26-000002 · SEC index · Original document

Summary rows

Aggregated the way they appear in lists: one row per insider, transaction code and security table.

X	Filed	Traded	Ticker	Insider	Title	Type	Price	Qty	Owned	ΔOwn	Value
	2026-03-23	2026-03-19	STRR	Diamond Matthew K	CAO	A - Grant	$0.00	+3,993	21.5K	+23%	$0
	2026-03-23	2026-03-19	STRR	Diamond Matthew K	CAO	F - Tax	$9.92	-551	20.9K	-3%	-$5,466

Purchase Sale Sale after option exercise All abbreviations

#	Table	Security	Date	Code	A/D	Shares	Price	Owned after	Own	Exercise / expiry	Underlying	Footnotes
1	Common	Common Stock	2026-03-19	A	A	3,993	$0.00	21,489	D	—	—	(F1) On January 24, 2025 (the "Grant Date"), the restricted stock units ("RSUs") were granted to the Reporting Person under the Issuer's 2009 Incentive Stock and Awards Plan, as amended and restated (the "2009 Incentive Plan") for which the performance conditions related to vesting were satisfied as of March 19, 2026. The RSUs granted are subject to time-based vesting conditions that vest 33% on the first anniversary of the Grant Date (1,318 RSUs), 33% on the second anniversary of the Grant Date (1,318 RSUs), and 34% on the third anniversary of the Grant Date (1,357 RSUs).
2	Common	Common Stock	2026-03-19	F	D	551	$9.92	20,938	D	—	—	(F2) 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. (F3) Includes (i) 6,889 RSUs credited to the Reporting Person's account under the Issuer's 2009 Incentive Plan; and (ii) 14,049 shares of common stock. Each RSU is the economic equivalent of one share of Common Stock. RSUs may be settled pursuant to the 2009 Incentive Plan by the issuance of Common Stock, the payment of cash, or a combination of both.