Insider · CIK 0001944544
Mark C Fuller
Files at CTM (Castellum, Inc.). First filing Mar 6, 2025, latest Sep 3, 2025.
In brief
Mark C Fuller files SEC Form 4 as director and 10% owner at CTM (Castellum, Inc.). Since Mar 6, 2025, Mark C Fuller has reported 0 open-market buys worth $0 and 3 open-market sells worth $1.8M, the latest filed on Sep 3, 2025.
A track record needs three past buys with six months of prices behind them; Mark C Fuller has 0, so none is measured yet.
The newest scored trade: sold $560k of CTM on Sep 3, 2025, filed Sep 3, 2025, scored 45 (moderate).
Where the trades landed
Last year at the company this insider has traded most, with each buy and sell on the bar it happened.
CTM: Castellum, Inc.
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
Signals
This insider’s open-market buys and sells, scored.
| Score | Company | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 45Moderate | Castellum, Inc. | $560k 500,000 shares | -8% | +703% from low-56% from high | |
| 41Moderate | Castellum, Inc. | $524k 500,000 shares | -7% | +632% from low-60% from high | |
| 44Moderate | Castellum, Inc. | $710k 500,000 shares | -7% | - |
Planned sales
Form 144 notices this insider filed before selling restricted or control stock, newest first.
| Filed | Company | Shares | Value | Sale date | Past 3 months |
|---|---|---|---|---|---|
| Aug 18, 2025 | CTM Castellum Inc | 500,000 0.05% of outstanding | $640k | Aug 18, 2025 | $518k |
| May 19, 2025 | CTM Castellum, Inc. | 500,000 0.58% of outstanding | $560k | May 19, 2025 | $703k |
| Mar 4, 2025 | CTM Castellum, Inc. | 500,000 0.89% of outstanding | $491k | Mar 5, 2025 | none |
Transactions
Every row this insider has filed, 5 in all, newest first.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Sep 3, 2025 | CTM Castellum, Inc. | SOpen-market sale Common Stock | -500,000 | $1.12 | $560k | 6,113,659 | Sep 3, 2025 |
| May 19, 2025 | CTM Castellum, Inc. | SOpen-market sale Common Stock | -500,000 | $1.05 | $524k | 6,613,659 | May 20, 2025 |
| Mar 5, 2025 | CTM Castellum, Inc. | JOther Common Stock | -50,000 | - | - | 7,613,659 | Mar 6, 2025 |
| Mar 5, 2025 | CTM Castellum, Inc. | SOpen-market sale Common Stock | -275,000 | $1.49 | $411k | 7,338,659 | Mar 6, 2025 |
| Mar 6, 2025 | CTM Castellum, Inc. | SOpen-market sale Common Stock | -225,000 | $1.33 | $300k | 7,113,659 | Mar 6, 2025 |
Questions about Mark C Fuller
Answered from the filings on this page, as of the latest one.
Is Mark C Fuller buying or selling?
Not in the last 12 months. Mark C Fuller's latest open-market trade on SEC Form 4 was sold $560k of CTM on Sep 3, 2025.
How did Mark C Fuller's past buys perform?
Not measured yet. InsiderTell needs three past buys with six months of prices to publish a track record, and Mark C Fuller has 0.
Where does Mark C Fuller file Form 4?
Mark C Fuller has filed Form 4 at CTM (Castellum, Inc.). A Form 4 is required of officers, directors and holders of more than 10% of a share class within two business days of a trade.
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.