Castellum, Inc.
CTM- Exchange
- NYSE
- Industry
- Services-Management Consulting Services
- SEC CIK
- 0001877939
In the last 90 days, Castellum, Inc. insiders filed 5 open-market purchases and 0 sales; 35 institutions reported holding it in 13F filings for Q2 2026, worth $5.69M in total; no superinvestor holds it.
Open-market trades, last 90 days
Open-market purchases (P) and sales (S) by Castellum, Inc. insiders, counted by Form 4 filing. Trades with a flagged price and duplicate filings are left out.
- Open-market buys
- 5 filings
- 4 insiders, $34.0K in total
- Open-market sells
- 0 filings
- Insiders trading
- 4
- Net value
- +$34.0K
- Purchases minus sales
Insider roster
Directors, officers and 10% owners who have filed a Form 4 for Castellum, Inc., current and former, most recent filer first. Last reported holding is the position after the last non-derivative trade in their latest filing.
| Name | Title | Last reported holding | Last filing | Filings, past year |
|---|---|---|---|---|
| Merriman Andrew | Chief Operating Officer | 588,531 | Sep 9, 2026 | 6 |
| Bell David T | Chief Financial Officer | 17,255 | Jul 2, 2026 | 3 |
| Martin Tammy L | General Counsel and Secretary | 15,031 | Jul 2, 2026 | 2 |
| Ives Glen R | President | 200,878 | Jul 2, 2026 | 4 |
| McMillen Charles Thomas | Director | 231,015 | Mar 27, 2026 | 3 |
| Wright Jay O | General Counsel, Secretary | 7,134,973 | Dec 22, 2025 | 6 |
| Champoux Bernard S | Director | 104,536 | Nov 13, 2025 | 1 |
| Alarie Mark S | Director | 112,920 | Nov 13, 2025 | 1 |
| Campbell John Francis | Director | 126,537 | Nov 13, 2025 | 1 |
| Fuller Mark C | Other: Former Officer and Affiliate | 6,113,659 | Sep 3, 2025 | 0 |
| Buckhout Laurie M | 10% Owner | – | Feb 23, 2024 | 0 |
| Frost Patricia | Director | 62,920 | Mar 23, 2023 | 0 |
| Kaunitz Emil | Director | 1,999,856 | Dec 21, 2022 | 0 |
Insider trades
Each row adds up one type of transaction in one Form 4 filing. Only open-market purchases (P) and sales (S) are shown by default; use the filters to see grants, option exercises and other codes.
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| Sep 9, 2025 (view filing) | Sep 5-9 | 4 days | Wright Jay OGeneral Counsel, Secretary | SSale | −446.7K | $1.12 | −$498.4K | −5.2%8.08M after | 3 lots |
| Sep 12, 2025 (view filing) | Sep 10-12 | 2 days | Wright Jay OGeneral Counsel, Secretary | SSale | −233.0K | $1.12 | −$261.0K | −2.9%7.84M after | 3 lots |
| Sep 17, 2025 (view filing) | Sep 15-16 | 2 days | Wright Jay OGeneral Counsel, Secretary | SSale | −100.0K | $1.11 | −$110.5K | −1.3%7.74M after | 2 lots |
| Nov 13, 2025 (view filing) | Nov 11-13 | 2 days | Wright Jay OGeneral Counsel, Secretary | SSale | −220.0K | $1.17 | −$258.0K | −2.8%7.52M after | 2 lots |
| Nov 18, 2025 (view filing) | Nov 14-17 | 4 days | Wright Jay OGeneral Counsel, Secretary | SSale | −100.0K | $1.15 | −$115.1K | −1.3%7.42M after | 2 lots |
| Dec 2, 2025 (view filing) | Nov 28-Dec 1 | 4 days | Wright Jay OGeneral Counsel, Secretary | SSale | −53.0K | $1.05 | −$55.8K | −0.7%7.37M after | 2 lots |
| Dec 12, 2025 (view filing) | Dec 10-12 | 2 days | Wright Jay OGeneral Counsel, Secretary | SSale | −188.0K | $1.19 | −$224.4K | −2.6%7.18M after | 3 lots |
| Dec 17, 2025 (view filing) | Dec 15-16 | 2 days | Wright Jay OGeneral Counsel, Secretary | SSale | −18.0K | $1.08 | −$19.4K | −0.3%7.16M after | 2 lots |
| Dec 22, 2025 (view filing) | Dec 19 | 3 days | Wright Jay OGeneral Counsel, Secretary | SSale | −30.0K | $1.05 | −$31.5K | −0.4%7.13M after | |
| Mar 18, 2026 (view filing) | Mar 18 | Same day | Merriman AndrewChief Operating Officer | PPurchase | +3.00K | $0.80 | +$2.40K | +0.6%534.0K after | |
| Mar 20, 2026 (view filing) | Mar 18 | 2 days | McMillen Charles ThomasDirector | SSale | −55.0K | $0.80 | −$44.0K | −17.4%261.0K after | |
| Mar 26, 2026 (view filing) | Mar 26 | Same day | Ives Glen RPresident | PPurchase | +10.0K | $0.66 | +$6.60K | +5.3%197.6K after | |
| Mar 27, 2026 (view filing) | Mar 25 | 2 days | McMillen Charles ThomasDirector | SSale | −30.0K | $0.70 | −$21.0K | −11.5%231.0K after | |
| Mar 27, 2026 (view filing) | Mar 27 | Same day | Ives Glen RPresident | PPurchase | +2.00K | $0.62 | +$1.24K | +1.0%199.6K after | |
| Mar 27, 2026 (view filing) | Mar 27 | Same day | Merriman AndrewChief Operating Officer | PPurchase | +2.00K | $0.64 | +$1.28K | +0.4%536.0K after | |
| Jul 2, 2026 (view filing)4:05 PM ET | Jul 1 | 1 day | Ives Glen RPresident | PPurchase | +1.26K | $0.612 | +$772.34 | +0.6%200.9K after | |
| Jul 2, 2026 (view filing)4:05 PM ET | Jul 1 | 1 day | Martin Tammy LGeneral Counsel and Secretary | PPurchase | +1.20K | $0.612 | +$735.62 | +8.7%15.0K after | |
| Jul 2, 2026 (view filing)4:06 PM ET | Jul 1 | 1 day | Bell David TChief Financial Officer | PPurchase | +1.20K | $0.612 | +$735.62 | +7.5%17.3K after | |
| Jul 2, 2026 (view filing)4:07 PM ET | Jul 1 | 1 day | Merriman AndrewChief Operating Officer | PPurchase | +1.20K | $0.612 | +$735.62 | +0.2%538.5K after | |
| Sep 9, 2026 (view filing)4:02 PM ET | Sep 9 | Same day | Merriman AndrewChief Operating Officer | PPurchase | +50.0K | $0.6194 | +$31.0K | +9.3%588.5K after | 2 lots |