CASTELLUM INC (CTM) Institutional Ownership and Insiders Activity

CASTELLUM INC (CTM) is widely held by institutional investors, with 33 firms reporting positions valued at approximately $5.63M based on SEC Form 13F filings for the quarter ended June 30, 2026.

Vanguard Capital Management Llc is the largest disclosed holder, reporting approximately $2.23M in CTM holdings in its latest filing.

Recent insider activity includes 6 tracked Form 4 transactions over the last three months, reflecting ongoing executive and director trading activity.