X0508 4 2025-12-08 0 0001210708 Star Equity Holdings, Inc. STRR 0001548312 Eberwein Jeffrey E. 53 FOREST AVENUE, SUITE 101 OLD GREENWICH CT 06870 1 1 1 0 Chief Executive Officer 0 Common Stock 2025-12-08 4 P 0 287631 10.43 A 990847 D Series A Preferred Stock 2025-12-08 4 S 0 320855 9.35 D 810217 D December 8, 2025, Mr. Eberwein entered into a securities exchange agreement with the Issuer, pursuant to which Mr. Eberwein purchased from the Issuer, 287,631 shares of common stock, in exchange for Mr. Eberwein transferring 320,855 shares of Preferred Stock to the Issuer. Includes 8,918 of Restricted Stock Units ("RSUs") which represent the right to receive, at settlement, one share of common stock. /s/ Jeffrey E. Eberwein 2025-12-10