Fuller Mark C — SEC Form 4 filings
SEC reporting owner CIK 1944544. 3 Form 4 filings on record with FilingPulse; latest filed 2025-09-03.
Transaction summary — filings shown
Covers all 3 filings on record, filed 2025-03-06 to 2025-09-03. Counts and totals are arithmetic on values as filed — descriptive data, not a recommendation.
- Open-market purchases (code P, non-derivative): none reported.
- Open-market sales (code S, non-derivative): 4 legs across 3 filings — 1,500,000 shares, $1,794,275 total (shares × price as filed).
- Other reported legs (grants, option exercises, tax withholding, gifts, derivative-security transactions, …): 1.
- Largest priced transaction: sale of 500,000 shares @ $1.12 ($560,000) in Castellum, Inc., filed 2025-09-03.
By issuer — same filings
Open-market purchase/sale legs on non-derivative securities, grouped by issuer. Role is as filed on the newest filing for that issuer. Dollar totals cover priced legs only (shares × price as filed). Ordered by priced transaction value, largest first.
| Issuer | Role (as filed) | Filings | Purchases (P) | Sales (S) | Other legs |
|---|---|---|---|---|---|
| Castellum, Inc. (CTM) | — | 3 | — | 4 legs · 1,500,000 sh · $1,794,275 | 1 |
Form 4 filings — Fuller Mark C
| Filed | Form | Issuer | Reported transactions | Source |
|---|---|---|---|---|
| 2025-09-03 | 4 | Castellum, Inc. (CTM) | Sale (S): 500,000 @ $1.12 | EDGAR |
| 2025-05-20 | 4 | Castellum, Inc. (CTM) | Sale (S): 500,000 @ $1.05 | EDGAR |
| 2025-03-06 | 4 | Castellum, Inc. (CTM) | Other (J): 50,000 · Sale (S): 275,000 @ $1.49 · Sale (S): 225,000 @ $1.33 | EDGAR |
FilingPulse's Form 4 archive currently extends back to 2024-01-11 and is expanding backward through EDGAR history — earlier filings by this insider may not be indexed yet. Names and roles are shown as filed.
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