David T. Bell - 11 Nov 2025 Form 4 Insider Report for Castellum, Inc. (CTM)

Reporting relationship: Chief Financial Officer, Treasurer
Issuer ticker: CTM
Reported as of: 11 Nov 2025
Net transaction value: $0
SEC form: 4
Accepted by SEC: 13 Nov 2025, 06:53:02 UTC
Prior SEC filing: 03 Apr 2023
Next 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 13 Nov 2025.

Key facts

This page summarizes David T. Bell's Form 4 filing for Castellum, Inc. (CTM).
1 reported transaction and 1 derivative row are listed below.
Accepted by SEC: 13 Nov 2025, 06:53.

Change

Previous filing in this sequence was filed on 03 Apr 2023.
Current net transaction value: $0.

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: 13 Nov 2025

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

CTM transaction Derivative

Stock Options

Award

Transaction value: $0
Shares: +225,000
Change %
Price: $0.000000
Shares after: 225,000
Date: 11 Nov 2025
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 225,000
Exercise price: $1.19
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

In connection with his continued employment, on November 11, 2025 Mr. Bell received 225,000 stock options issued pursuant to the Castellum, Inc. Second Amended 2021 Stock Incentive Plan to purchase 225,000 shares of common stock which vest ratably over twenty months, commencing December 1, 2025.