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.
Key figures
- Insider buysLast 90 days, $34.0K in total
- 5
- Insider sellsOpen market, last 90 days
- 0
- 13F holdersQ2 2026, +8 vs. previous quarter
- 35
- 13F valueReported value at the end of Q2 2026
- $5.69M
- Superinvestors holdingAt the end of Q2 2026
- 0
Price chart
Superinvestors holding CTM, Q2 2026
No superinvestor reported holding CTM at the end of Q2 2026.
Latest insider trades
Open-market purchases and sales by Castellum, Inc. insiders from Form 4, newest first.
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| 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 |
| 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 | |
| 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)4:05 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)4:05 PM ET | Jul 1 | 1 day | Ives Glen RPresident | PPurchase | +1.26K | $0.612 | +$772.34 | +0.6%200.9K 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 | |
| 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 25 | 2 days | McMillen Charles ThomasDirector | SSale | −30.0K | $0.70 | −$21.0K | −11.5%231.0K 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 20, 2026 (view filing) | Mar 18 | 2 days | McMillen Charles ThomasDirector | SSale | −55.0K | $0.80 | −$44.0K | −17.4%261.0K after |
Top 10 13F holders, Q2 2026
The largest institutional positions in Castellum, Inc. at the end of Q2 2026; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Vanguard Capital Management LLC | 3,093,768 | $2.23M | 0.00% | +12,511+0.4% | Added |
| Meridian Wealth Management, LLC | 863,200 | $621.4K | 0.02% | +77,400+9.8% | Added |
| Geode Capital Management, LLC | 816,037 | $587.6K | 0.00% | −128,862−13.6% | Reduced |
| Captrust Financial Advisors | 626,100 | $450.7K | 0.00% | 00.0% | Unchanged |
| Vanguard Fiduciary Trust Co | 492,717 | $354.8K | 0.00% | +74,393+17.8% | Added |
| State Street Corp | 303,900 | $218.8K | 0.00% | 00.0% | Unchanged |
| BlackRock, Inc. | 265,486 | $191.1K | 0.00% | 00.0% | Unchanged |
| Savvy Advisors, Inc. | 220,300 | $158.6K | 0.00% | −1,500−0.7% | Reduced |
| UBS Group AG | 208,958 | $150.4K | 0.00% | +55,429+36.1% | Added |
| Northern Trust Corp | 171,420 | $123.4K | 0.00% | −10,482−5.8% | Reduced |