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.
13F holders, Q2 2025
Institutional positions in Castellum, Inc. as of Jun 30, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 33
- +8 vs. Q1 2025
- Shares held
- 6.95M
- +3.64M (+110.0%) vs. Q1 2025
- Total value
- $7.30M
- +$3.99M (+120.6%) vs. Q1 2025
- New holders
- 14
- 8 more added
- Sold out
- 6
- 2 more reduced
Compare with Q1 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting CTM on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 35 | $5.69M |
| Q1 2026 | 27 | $4.56M |
| Q4 2025 | 40 | $11.7M |
| Q3 2025 | 42 | $9.27M |
| Q2 2025 | 33 | $7.30M |
| Q1 2025 | 25 | $3.31M |
| Q4 2024 | 20 | $9.53M |
| Q3 2024 | 17 | $265.6K |
| Q2 2024 | 21 | $965.6K |
| Q1 2024 | 21 | $1.58M |
| Q4 2023 | 20 | $534.7K |
| Q3 2023 | 17 | $262.2K |
| Q2 2023 | 17 | $565.7K |
| Q1 2023 | 14 | $989.3K |
| Q4 2022 | 13 | $1.02M |
| Q3 2022 | 0 | $0 |
| Q2 2022 | 0 | $0 |
| Q1 2022 | 0 | $0 |
| Q4 2021 | 0 | $0 |
| Q3 2021 | 0 | $0 |
| Q2 2021 | 0 | $0 |
| Q1 2021 | 0 | $0 |
Institutions, Q2 2025
Shares, value and share of portfolio for each institution holding Castellum, Inc.; share changes are against Q1 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Essex Investment Management Co LLC | 2,090,500 | $2.20M | 0.40% | +2,090,500 | New |
| Vanguard Group Inc | 1,051,978 | $1.10M | 0.00% | +412,350+64.5% | Added |
| Legato Capital Management LLC | 621,409 | $652.5K | 0.08% | +621,409 | New |
| Meridian Wealth Management, LLC | 616,800 | $647.6K | 0.03% | +36,000+6.2% | Added |
| Geode Capital Management, LLC | 599,198 | $629.3K | 0.00% | +180,673+43.2% | Added |
| Bank of New York Mellon Corp | 500,001 | $525.0K | 0.00% | −100,001−16.7% | Reduced |
| Jane Street Group, LLC | 194,733 | $204.5K | 0.00% | +194,733 | New |
| Savvy Advisors, Inc. | 191,100 | $200.7K | 0.01% | +191,100 | New |
| State Street Corp | 156,000 | $163.8K | 0.00% | 00.0% | Unchanged |
| XTX Topco Ltd | 135,796 | $142.6K | 0.01% | +70,377+107.6% | Added |
| BlackRock, Inc. | 127,421 | $133.8K | 0.00% | 00.0% | Unchanged |
| Virtu Financial LLC | 105,126 | $110.0K | 0.01% | +85,997+449.6% | Added |
| Cubist Systematic Strategies, LLC | 94,152 | $98.9K | 0.00% | +26,472+39.1% | Added |
| Northern Trust Corp | 94,120 | $98.8K | 0.00% | 00.0% | Unchanged |
| Almanack Investment Partners, LLC. | 50,000 | $52.5K | 0.01% | 00.0% | Unchanged |
| HRT Financial LP | 50,395 | $52.0K | 0.00% | +50,395 | New |
| PKS Advisory Services, LLC | 42,222 | $44.3K | 0.01% | 00.0% | Unchanged |
| Two Sigma Investments, LP | 32,996 | $34.6K | 0.00% | +32,996 | New |
| Citigroup Inc | 31,628 | $33.2K | 0.00% | +31,628 | New |
| Kestra Private Wealth Services, LLC | 27,250 | $28.6K | 0.00% | 00.0% | Unchanged |
| Squarepoint Ops LLC | 23,940 | $25.1K | 0.00% | +23,940 | New |
| Quadrature Capital Ltd | 21,089 | $22.2K | 0.00% | +21,089 | New |
| Susquehanna International Group, LLP | 17,710 | $18.6K | 0.00% | +19+0.1% | Added |
| Pathstone Holdings, LLC | 15,590 | $16.4K | 0.00% | +15,590 | New |
| Ronald Blue Trust, Inc. | 14,724 | $15.5K | 0.00% | 00.0% | Unchanged |
| Inscription Capital, LLC | 12,500 | $13.1K | 0.00% | −237,500−95.0% | Reduced |
| New Century Financial Group, LLC | 12,000 | $12.6K | 0.01% | +12,000 | New |
| Creative Planning | 10,000 | $10.5K | 0.00% | 00.0% | Unchanged |
| Sunbelt Securities, Inc. | 3,000 | $6.00K | 0.00% | +3,000 | New |
| Global Retirement Partners, LLC | 4,812 | $5.05K | 0.00% | +4,812 | New |
| Strengthening Families & Communities, LLC | 2,700 | $2.86K | 0.00% | +2,700 | New |
| Bank of America Corp | 589 | $619 | 0.00% | +224+61.4% | Added |
| UBS Group AG | 76 | $80 | 0.00% | 00.0% | Unchanged |
| TownSquare Capital, LLC | 0 | $0 | 0.00% | −44,750−100.0% | Sold out |
| Tower Research Capital LLC (TRC) | 0 | $0 | 0.00% | −38,961−100.0% | Sold out |
| MML Investors Services, LLC | 0 | $0 | 0.00% | −27,937−100.0% | Sold out |
| Two Sigma Securities, LLC | 0 | $0 | 0.00% | −17,230−100.0% | Sold out |
| Westside Investment Management, Inc. | 0 | $0 | 0.00% | −680−100.0% | Sold out |
| American Capital Advisory, LLC | 0 | $0 | 0.00% | −342−100.0% | Sold out |