X0206 3 2022-10-12 0 0001877939 Castellum, Inc. CTM 0001944544 Fuller Mark C 3 BETHESDA METRO CENTER, SUITE 700 BETHESDA, MD 20814 1 1 0 0 Chief Executive Officer, Chair Common Stock 25019 I See footnote Common Stock 50000 I See footnote Common Stock 25000 I Katherine Fuller, daughter Common Stock 25000 I Michael Fuller, son Series B Preferred Stock Common Stock 7522500 I See footnote Warrants 1.60 2021-01-20 2028-01-20 Common Stock 65000 D Warrants 3.40 2021-08-05 2028-08-05 Common Stock 160000 D Warrants 2.00 2021-08-12 2028-08-12 Common Stock 725425 D Warrants 4.00 2021-11-16 2028-11-16 Common Stock 85000 D Warrants 3.80 2022-05-02 2029-05-02 Common Stock 180509 D Held by The Mark Chapppelle Fuller Revocable Trust, Mark Fuller, Trustee. Held by Janice Lynee Dudley Revocable Trust, Janice Lynn Dudley, TTEE, Spouse. 1,504,500 shares of the Series B Preferred Stock will be converted into 7,522,500 shares of Common Stock, concurrently with the Company's offering. Mr. Fuller was granted a total of 1,215,934 warrants that are exercisable into 1,215,934 shares of Common Stock. /s/ Mark Fuller 2022-10-12