As of September 29, 2026, Castellum's top three insider holders are Jay O Wright (Director, 9.10Mn shares), Mark C Fuller (Chief Executive Officer, 8.86Mn shares), Jay O Wright (General Counsel, Secretary, 7.13Mn shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Jay O Wright | General Counsel, Secretary | 7,134,973 | 0 | 7,134,973 | 42.7% | 22 Dec, 2025 |
| 2 | Mark C Fuller | Ceo, President | 6,113,659 | 0 | 6,113,659 | 36.6% | 03 Sep, 2025 |
| 3 | Emil Kaunitz | Director | 1,999,856 | 0 | 1,999,856 | 12.0% | 21 Dec, 2022 |
| 4 | Andrew Merriman | Chief Operating Officer | 588,531 | 0 | 588,531 | 3.5% | 09 Sep, 2026 |
| 5 | Charles Thomas Mcmillen | Director | 231,015 | 0 | 231,015 | 1.4% | 27 Mar, 2026 |
| 6 | Glen R Ives | President | 200,878 | 0 | 200,878 | 1.2% | 02 Jul, 2026 |
| 7 | John Francis Campbell | Director | 126,537 | 0 | 126,537 | 0.8% | 23 Mar, 2023 |
| 8 | Mark S Alarie | Director | 112,920 | 0 | 112,920 | 0.7% | 23 Mar, 2023 |
| 9 | Bernard S Champoux | Director, Other | 104,536 | 0 | 104,536 | 0.6% | 23 Mar, 2023 |
| 10 | Patricia Frost | Director | 62,920 | 0 | 62,920 | 0.4% | 23 Mar, 2023 |
| 11 | David T Bell | Chief Financial Officer | 17,255 | 0 | 17,255 | 0.1% | 02 Jul, 2026 |
| 12 | Tammy L Martin | General Counsel And Secretary | 15,031 | 0 | 15,031 | 0.1% | 02 Jul, 2026 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 09 Sep, 2026 | Andrew Merriman | Chief Operating Officer | Acquired P | 40,000 | $0.62 | $24.77K | 578,531 | Direct |
| 09 Sep, 2026 | Andrew Merriman | Chief Operating Officer | Acquired P | 10,000 | $0.62 | $6.20K | 588,531 | Direct |
| 01 Jul, 2026 | Andrew Merriman | Chief Operating Officer | Acquired P | 1,202 | $0.61 | $736 | 538,531 | Direct |
| 01 Jul, 2026 | Glen R Ives | President | Acquired P | 1,262 | $0.61 | $772 | 200,878 | Direct |
| 01 Jul, 2026 | David T Bell | Chief Financial Officer | Acquired P | 1,202 | $0.61 | $736 | 17,255 | Direct |
| 01 Jul, 2026 | Tammy L Martin | General Counsel And Secretary | Acquired P | 1,202 | $0.61 | $736 | 15,031 | Direct |
| 01 Jul, 2026 | Glen R Ives | President | Acquired A | 773,630 | — | — | 773,630 | Direct |
| 31 Mar, 2026 | Andrew Merriman | Chief Operating Officer | Acquired A | 1,329 | $0.45 | $604 | 537,329 | Direct |
| 31 Mar, 2026 | Tammy L Martin | General Counsel And Secretary | Acquired A | 1,329 | $0.45 | $604 | 13,829 | Direct |
| 31 Mar, 2026 | David T Bell | Chief Financial Officer | Acquired A | 1,329 | $0.45 | $604 | 16,053 | Direct |
| 25 Mar, 2026 | Charles Thomas Mcmillen | Director | Disposed S | 30,000 | $0.70 | $21.13K | 231,015 | Direct |
| 27 Mar, 2026 | Glen R Ives | President | Acquired P | 2,000 | $0.62 | $1.23K | 199,616 | Direct |
| 27 Mar, 2026 | Andrew Merriman | Chief Operating Officer | Acquired P | 2,000 | $0.64 | $1.29K | 536,000 | Direct |
| 26 Mar, 2026 | Glen R Ives | President | Acquired P | 10,000 | $0.66 | $6.65K | 197,616 | Direct |
| 18 Mar, 2026 | Charles Thomas Mcmillen | Director | Disposed S | 55,000 | $0.80 | $44.10K | 261,015 | Direct |
| 18 Mar, 2026 | Andrew Merriman | Chief Operating Officer | Acquired P | 3,000 | $0.80 | $2.39K | 534,000 | Direct |
| 19 Dec, 2025 | Jay O Wright | General Counsel, Secretary | Disposed S | 30,000 | $1.05 | $31.50K | 7,134,973 | Direct |
| 15 Dec, 2025 | Jay O Wright | General Counsel, Secretary | Disposed S | 6,000 | $1.10 | $6.62K | 7,176,973 | Direct |
| 16 Dec, 2025 | Jay O Wright | General Counsel, Secretary | Disposed S | 12,000 | $1.07 | $12.88K | 7,164,973 | Direct |
| 10 Dec, 2025 | Jay O Wright | General Counsel, Secretary | Disposed S | 127,000 | $1.21 | $153.29K | 7,243,973 | Direct |