Mark C. Fuller
CIK: 0001944544
Transaction Breakdown
High conviction signal
Position reduction
Derivative conversions
Compensation grants
Gifts, tax withholding, conversions, dispositions to the issuer and other codes
Companies & Roles (1)
Castellum, Inc.
Discretionary Trading P&L
Holdings
Transaction History (5 total)
- Sep 3, 2025CTM
Castellum, Inc.
Sale(S)Direct500K shares at avg. $1.12$560K - May 19, 2025CTM
Castellum, Inc.
Sale(S)Direct500K shares at avg. $1.05$524K - Mar 6, 2025CTM
Castellum, Inc.
Sale(S)Direct225K shares at avg. $1.33$300K - Mar 5, 2025CTM
Castellum, Inc.
Other(J)Direct50K shares- - Mar 5, 2025CTM
Castellum, Inc.
Sale(S)Direct275K shares at avg. $1.49$411K
| Type | Shares | Price | Ownership | |||
|---|---|---|---|---|---|---|
| Sep 3, 2025 | CTM Castellum, Inc. | Sale(S) | 500,000 | $1.12 | $560,000 | Direct |
| May 19, 2025 | CTM Castellum, Inc. | Sale(S) | 500,000 | $1.05 | $524,000 | Direct |
| Mar 6, 2025 | CTM Castellum, Inc. | Sale(S) | 225,000 | $1.33 | $299,700 | Direct |
| Mar 5, 2025 | CTM Castellum, Inc. | Other(J) | 50,000 | - | - | Direct |
| Mar 5, 2025 | CTM Castellum, Inc. | Sale(S) | 275,000 | $1.49 | $410,575 | Direct |
1-5 of 5 transactions
About Fuller Mark C
Fuller Mark C (SEC CIK 0001944544) files insider reports with the SEC as Director of Castellum, Inc. (CTM).
Signal8 holds 3 ownership filings by Fuller Mark C, all Form 4s, filed between Mar 6, 2025 and Sep 3, 2025. Those filings report 5 transactions, from Mar 5, 2025 to Sep 3, 2025. Signal8's Form 4 history starts in Sep 2024.
The business address on Fuller Mark C's filings is in VIENNA, VA.
Recent filings by Fuller Mark C
- Sep 3, 2025: Open-market sale of CTM shares (Form 4, code S).
- May 19, 2025: Open-market sale of CTM shares (Form 4, code S).
- Mar 6, 2025: Open-market sale of CTM shares (Form 4, code S).
- Mar 5, 2025: Other transaction of CTM shares (Form 4, code J).
- Mar 5, 2025: Open-market sale of CTM shares (Form 4, code S).
Other insiders filing for Castellum, Inc. (CTM)
- MARTIN TAMMY L, General Counsel and Secretary
- Bell David T, Chief Financial Officer
- Merriman Andrew, Chief Operating Officer
- Ives Glen R, President
- McMillen Charles Thomas, Director
- WRIGHT JAY O, General Counsel, Secretary