• Castellum Chief Operating Officer Andrew Merriman bought 50,000 common shares in two open-market purchases.
• Purchase prices were USD 0.62 per share, leaving him with 588,531 shares owned directly.

Disclaimer: This news brief was created by Public Technologies (PUBT) using generative artificial intelligence. While PUBT strives to provide accurate and timely information, this AI-generated content is for informational purposes only and should not be interpreted as financial, investment, or legal advice. Castellum Inc. published the original content used to generate this news brief via EDGAR, the Electronic Data Gathering, Analysis, and Retrieval system operated by the U.S. Securities and Exchange Commission (Ref. ID: 0001877939-26-000079), on September 09, 2026, and is solely responsible for the information contained therein.