David T. Bell - 01 Jul 2026 Form 4 Insider Report for Castellum, Inc. (CTM)

Reporting relationship: Chief Financial Officer, Treasurer
Issuer ticker: CTM
Reported as of: 01 Jul 2026
Net transaction value: +$736
SEC form: 4
Accepted by SEC: 02 Jul 2026, 16:06:25 UTC
Prior SEC filing: 31 Mar 2026
Source filing: View source filing
Reporting owner signature: /s/ David T. Bell

Key filing fact

David T. Bell filed Form 4 for Castellum, Inc. (CTM) on 02 Jul 2026.

Key facts

This page summarizes David T. Bell's Form 4 filing for Castellum, Inc. (CTM).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 02 Jul 2026, 16:06.

Change

Previous filing in this sequence was filed on 31 Mar 2026.
Current net transaction value: +$736.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001944338 Primary reporting owner

Bell David T

Relationship: Chief Financial Officer, Treasurer
Address: 1934 OLD GALLOWS ROAD, SUITE 350, VIENNA
Signature: /s/ David T. Bell
Signature date: 02 Jul 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

CTM transaction

Common Stock

Purchase

Transaction value: $736
Shares: +1,202
Change %: +7.5%
Price: $0.6120
Shares after: 17,255
Date: 01 Jul 2026
Ownership: Direct
Footnotes: F1

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 1 footnote

Footnote F1

Pursuant to the terms of the Castellum, Inc. 2025 Employee Stock Purchase Plan, the reporting person purchased 1,202 shares of common stock of the Registrant. The per share purchase price was calculated at a discount of fifteen percent to the closing price of the Registrant's common stock as quoted on the NYSE American LLC on June 30, 2026.