Castellum Inc. (NYSE-American: CTM) announced its 2026 Annual Meeting of Stockholders will take place on May 19, 2026, at 10:00 a.m. ET. The Vienna, Virginia-based cybersecurity and software services company said stockholders of record as of March 20, 2026, are entitled to attend and vote at the meeting.

The meeting will be held both in person at Intelligent Office in Tysons, Virginia, and virtually via live audio webcast. Stockholders can participate virtually by dialing (800) 715-9871 or (646) 307-1963, using conference identification number 9842123.

The company encouraged stockholders to vote their shares in advance using methods described in the proxy materials, including internet, telephone, or mail options. Following the meeting's adjournment, Castellum's management will host a presentation and question-and-answer session.

Castellum provides cybersecurity, electronic warfare, and software services to federal government clients. The company also offers expertise in artificial intelligence, machine learning, 5G technologies, and systems engineering.

Additional meeting information, including the agenda, proxy statement, and annual report, is available through the Securities and Exchange Commission's website.