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 2025 vs. Q1 2025
How the institutions holding Castellum, Inc. changed between Q1 2025 and Q2 2025.
All holders in Q2 2025All holders in Q1 2025
| Measure | Q1 2025 | Q2 2025 | Change |
|---|---|---|---|
| Holders | 25 | 33 | +8 |
| Shares | 3.31M | 6.95M | +3.64M (+110.0%) |
| Value | $3.31M | $7.30M | +$3.99M (+120.6%) |
New holders (14)
Institutions that held Castellum, Inc. at the end of Q2 2025 but not at the end of Q1 2025.
| Institution | Shares | Value | % of portfolio |
|---|---|---|---|
| Essex Investment Management Co LLC | 2,090,500 | $2.20M | 0.40% |
| Legato Capital Management LLC | 621,409 | $652.5K | 0.08% |
| Jane Street Group, LLC | 194,733 | $204.5K | 0.00% |
| Savvy Advisors, Inc. | 191,100 | $200.7K | 0.01% |
| HRT Financial LP | 50,395 | $52.0K | 0.00% |
| Two Sigma Investments, LP | 32,996 | $34.6K | 0.00% |
| Citigroup Inc | 31,628 | $33.2K | 0.00% |
| Squarepoint Ops LLC | 23,940 | $25.1K | 0.00% |
| Quadrature Capital Ltd | 21,089 | $22.2K | 0.00% |
| Pathstone Holdings, LLC | 15,590 | $16.4K | 0.00% |
| New Century Financial Group, LLC | 12,000 | $12.6K | 0.01% |
| Sunbelt Securities, Inc. | 3,000 | $6.00K | 0.00% |
| Global Retirement Partners, LLC | 4,812 | $5.05K | 0.00% |
| Strengthening Families & Communities, LLC | 2,700 | $2.86K | 0.00% |
Sold out (6)
Institutions that held Castellum, Inc. at the end of Q1 2025 and filed for Q2 2025 without it.
| Institution | Shares, Q1 2025 | Value, Q1 2025 |
|---|---|---|
| TownSquare Capital, LLC | 44,750 | $47.4K |
| Tower Research Capital LLC (TRC) | 38,961 | $41.3K |
| MML Investors Services, LLC | 27,937 | $30.0K |
| Two Sigma Securities, LLC | 17,230 | $18.3K |
| Westside Investment Management, Inc. | 680 | $721 |
| American Capital Advisory, LLC | 342 | $363 |