CTM Castellum, Inc. - 8-K

Item 8.01 Other Events.

On April 23, 2026 Castellum, Inc. issued a press release announcing it has achieved CMMC Level 2 C3PAO Certification. The full text of the press release is attached hereto as Exhibit 99.1 and is incorporated herein by reference.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits .

Exhibit No.

Exhibit Title

99.1

Press Release dated April 23 , 2026

104

Cover Page Interactive Data File (embedded within the Inline XBRL document).