X0508 4 2025-11-11 0 0001877939 Castellum, Inc. CTM 0001947093 Alarie Mark S 1934 OLD GALLOWS ROAD SUITE 350 VIENNA VA 22182 1 0 0 0 0 Stock Options 1.19 2025-11-11 4 A 0 100000 0 A 2032-11-10 Common Stock 100000 100000 D As compensation for his service as an independent member of the Board of Directors, Mr. Alarie received 100,000 stock options granted pursuant to the terms of the Castellum, Inc. Second Amended 2021 Stock Incentive Plan to purchase 100,000 shares of common stock which vest ratably over a period of twenty months commencing December 1, 2025. /s/ Mark S. Alarie 2025-11-13