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.
Q2 2026 vs. Q1 2026
How the institutions holding Castellum, Inc. changed between Q1 2026 and Q2 2026.
All holders in Q2 2026All holders in Q1 2026
| Measure | Q1 2026 | Q2 2026 | Change |
|---|---|---|---|
| Holders | 27 | 35 | +8 |
| Shares | 7.74M | 7.91M | +174.2K (+2.3%) |
| Value | $4.56M | $5.69M | +$1.13M (+24.8%) |
New holders (12)
Institutions that held Castellum, Inc. at the end of Q2 2026 but not at the end of Q1 2026.
| Institution | Shares | Value | % of portfolio |
|---|---|---|---|
| Virtu Financial LLC | 168,401 | $121.0K | 0.00% |
| TCG Advisory Services, LLC | 57,414 | $41.3K | 0.00% |
| Arq Wealth Advisors, LLC | 35,000 | $22.8K | 0.00% |
| XTX Topco Ltd | 21,910 | $15.8K | 0.00% |
| ACT Advisors, LLC. | 21,074 | $15.2K | 0.01% |
| PKS Advisory Services, LLC | 18,931 | $13.6K | 0.00% |
| Tower Research Capital LLC (TRC) | 5,872 | $4.23K | 0.00% |
| Cape Investment Advisory, Inc. | 2,000 | $1.44K | 0.00% |
| TD Waterhouse Canada Inc. | 500 | $361 | 0.00% |
| Advisor Group Holdings, Inc. | 215 | $154 | 0.00% |
| Harbour Investments, Inc. | 150 | $108 | 0.00% |
| Clearstead Advisors, LLC | 100 | $72 | 0.00% |
Sold out (4)
Institutions that held Castellum, Inc. at the end of Q1 2026 and filed for Q2 2026 without it.
| Institution | Shares, Q1 2026 | Value, Q1 2026 |
|---|---|---|
| SEI Investments Co | 121,574 | $71.7K |
| HRT Financial LP | 33,836 | $19.0K |
| Ground Swell Capital, LLC | 21,090 | $12.4K |
| Citigroup Inc | 7,040 | $4.15K |