Castellum stockholders re-elect 5 directors, ratify auditor, approve stock plan amendment

Stockholders elected five directors of the Company to hold office until the next Annual Meeting of Stockholders and until their successors are duly elected and qualify. The name of each director elected, and the votes cast for such individuals are set forth below: Name For Withheld Broker Non-Votes Mark S. Alarie 26,773,763 6,942,753 22,789,172 John F. Campbell 26,063,019 7,653,497 22,789,172 Bernard S. Champoux 26,970,017 6,746,499 22,789,172 Glen R. Ives 29,097,115 4,619,401 22,789,172 C. Thomas McMillen 26,288,648 7,427,868 22,789,172

Stockholders approved an amendment to the Castellum, Inc. Second Amended 2021 Stock Incentive Plan to increase the aggregate number of shares reserved for issuance under the plan to 13,000,000. The votes regarding Proposal 3 are set forth below: For Against Abstentions Broker Non-Votes 19,780,876 13,632,126 303,514 22,789,172

Stockholders approved a proposal to ratify the Company’s appointment of RSM US LLP as the Company’s independent registered public accounting firm for the fiscal year ended December 31, 2026. The votes regarding Proposal 2 are set forth below: For Against Abstentions 53,771,662 2,553,667 180,359