Mark C. Fuller serves as Executive at Castellum, Inc., where they oversee executive responsibilities. Since joining the company, Mark C. Fuller has executed 8 insider transactions totaling $179.8M, demonstrating a bullish approach to their equity position. Their most recent transaction on Sep 3, 2025 involved selling 500,000 shares valued at $560.0K.
Mark C. Fuller currently holds 6,113,659 shares of Castellum, Inc. (CTM), valued at approximately $0. This represents their equity stake as Executive.
Based on SEC Form 4 filings, Mark C. Fuller has been a net buyer of CTM stock. They have purchased $90.4M and sold $89.4M worth of shares.
Mark C. Fuller's most recent insider trade was on Sep 3, 2025, when they sold 500,000 shares at $1.12 per share.
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| $0.65 |
| Discretionary |
| Dec 2, 2022 | CTM | $1.6M | Purchase | 1,294 | $1246.00 | Discretionary |
| Nov 30, 2022 | CTM | $76.5M | Sale | 9,544 | $8017.00 | Discretionary |
| Nov 30, 2022 | CTM | $76.5M | Purchase | 9,544 | $8017.00 | Discretionary |
| Nov 28, 2022 | CTM | $12.3M | Sale | 4,302 | $2860.00 | Discretionary |
| Nov 28, 2022 | CTM | $12.3M | Purchase | 4,302 | $2860.00 | Discretionary |
| Oct 17, 2022 | CTM | $0 | Conversion | 7,522,500 | $N/A | Discretionary |