Charles Thomas McMillen - 11 Nov 2025 Form 4 Insider Report for Castellum, Inc. (CTM)

Reporting relationship: Director
Issuer ticker: CTM
Reported as of: 11 Nov 2025
Net transaction value: $0
SEC form: 4
Accepted by SEC: 13 Nov 2025, 06:52:12 UTC
Prior SEC filing: 21 Aug 2025
Next SEC filing: 20 Mar 2026
Source filing: View source filing
Reporting owner signature: /s/ C. Thomas McMillen

Key filing fact

Charles Thomas McMillen filed Form 4 for Castellum, Inc. (CTM) on 13 Nov 2025.

Key facts

This page summarizes Charles Thomas McMillen's Form 4 filing for Castellum, Inc. (CTM).
1 reported transaction and 1 derivative row are listed below.
Accepted by SEC: 13 Nov 2025, 06:52.

Change

Previous filing in this sequence was filed on 21 Aug 2025.
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 0001332108 Primary reporting owner

McMillen Charles Thomas

Relationship: Director
Address: 1103 SOUTH CAROLINA AVENUE, WASHINGTON
Signature: /s/ C. Thomas McMillen
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: +100,000
Change %
Price: $0.000000
Shares after: 100,000
Date: 11 Nov 2025
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 100,000
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

As compensation for his service as an independent member of the Board of Directors, Mr. McMillen received 100,000 stock options granted pursuant to the terms of the Castellum, Inc. Second Amended 2021 Stock Incentive Plan to purchase 100,000 shares of common stock which vest ratably over a period of twenty months commencing December 1, 2025.