Fuller Mark C
SEC insider (Form 3/4/5 filer). CIK 0001944544. Director & 10% Owner at Castellum, Inc. (CTM). 5 reported Form 4/5 transactions since Sep 2024; latest on Sep 3, 2025. Located in VIENNA, VA.
Companies Fuller Mark C has filed insider reports for
- Castellum, Inc. (CTM): Director, 10% Owner
Fuller Mark C
CIK: 0001944544
Transaction Breakdown
Open Market Buys (P)0 (0.0%)
High conviction signal
Open Market Sales (S)4 (80.0%)
Position reduction
Option Exercises (M)0 (0.0%)
Derivative conversions
Awards (A)0 (0.0%)
Compensation grants
Other (G, F, J, C, D, …)1 (20.0%)
Gifts, tax withholding, conversions, dispositions to the issuer and other codes
Companies & Roles (1)
CTM
Castellum, Inc.
Director10% Owner
Discretionary Trading P&L
Holdings
Transaction History (5 total)
- Sep 3, 2025CTM
Castellum, Inc.
SaleDirect500K shares at avg. $1.12$560K - May 19, 2025CTM
Castellum, Inc.
SaleDirect500K shares at avg. $1.05$524K - Mar 6, 2025CTM
Castellum, Inc.
SaleDirect225K shares at avg. $1.33$300K - Mar 5, 2025CTM
Castellum, Inc.
OtherDirect50K shares- - Mar 5, 2025CTM
Castellum, Inc.
SaleDirect275K shares at avg. $1.49$411K
| Type | Shares | Price | Ownership | |||
|---|---|---|---|---|---|---|
| Sep 3, 2025 | CTM Castellum, Inc. | Sale | 500,000 | $1.12 | $560,000 | Direct |
| May 19, 2025 | CTM Castellum, Inc. | Sale | 500,000 | $1.05 | $524,000 | Direct |
| Mar 6, 2025 | CTM Castellum, Inc. | Sale | 225,000 | $1.33 | $299,700 | Direct |
| Mar 5, 2025 | CTM Castellum, Inc. | Other | 50,000 | - | - | Direct |
| Mar 5, 2025 | CTM Castellum, Inc. | Sale | 275,000 | $1.49 | $410,575 | Direct |
1-5 of 5 transactions