Andrew Merriman, Chief Operating Officer at Castellum, Inc. (CTM), bought 1,396 shares at $0.54 ($747) on 2026-10-01, disclosed to the SEC on 2026-10-01.
Open-market purchase of $747 CTM by Chief Operating Officer. Below the thresholds we flag for high-conviction alerts (no C-suite role, rare reversal, cluster, or A-grade history). Context: insider career grade D.
Nothing distinguishes this filing.
| Filing → |
| CTM | BUY | 2026-03-27 | $3K | — | Filing → |
| CTM | BUY | 2026-03-18 | $5K | — | Filing → |