X0306 4 2022-10-17 0 0001877939 Castellum, Inc. CTM 0001944544 Fuller Mark C 3 BETHESDA METRO CENTER, SUITE 700 BETHESDA MD 20814 1 1 1 0 Chief Executive Officer Common Stock 2022-10-17 4 C 0 7522500 A 8863453 I See footnote Series B Preferred Stock 2022-10-17 4 C 0 1504500 D Common Stock 7522500 0 I See footnote Warrants 2.00 2022-10-17 4 A 0 500000 A 2022-10-17 2029-10-16 Common Stock 500000 500000 D The Mark Chappelle Fuller Revocable Trust, Mark Fuller, TTEE held 1,504,500 shares of Series B Preferred Stock which was converted into 7,522,500 shares of Common Stock. Includes (a) 7,447,519 common shares held by The Mark Chappelle Fuller Reocable Trust, Mark Fuller, TTEE, (b) 25,000 common shares held by Janice Lynn Dudley Revocable Trust, Janice Lynn Dudley TTEE, (c) 25,000 common shares held by Katherine Fuller, (d) 50,000 common shares held by Michael Fuller. Pursuant to the terms of his employment agreement, Mr. Fuller was granted warrants to purchase 500,000 warrants to purchase Common Stock at $2.00 per share in connection with the Company's offering, all of which are excercisable. /s/ Mark Fuller 2022-10-20