CastellumCTM
13F holders, Q3 2025 (September 30)42holders +9
14new positions
5sold out
$1.09avg. 13F price*
At the end of Q3 2025, 42 institutions reported holding Castellum Inc. (CTM) in their 13F filings, up 9 from Q2 2025. 14 opened new positions and 5 sold out. The largest holders were Essex Investment Management Co. LLC ($2.3M), Vanguard Group Inc. ($1.4M) and Geode Capital Management, LLC ($789K).
- Company
- Castellum Inc.
- CUSIP
- 14838T204
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q2 2025 → Q3 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 14 | $841K |
| Exits | 5 | $196K |
All 13F filers, Q2 2025 → Q3 2025: 1,959,810 shares bought and 405,714 shares sold, net +1,554,096 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 42 holders
| Essex Investment Management Co. LLC | 0.36% | Add +3.0% | 2,153,617 | $2.3M |
| Vanguard Group Inc. | 0.00% | Add +21.5% | 1,277,915 | $1.4M |
| Geode Capital Management, LLC | 0.00% | Add +20.8% | 723,527 | $789K |
| Meridian Wealth Management, LLC | 0.03% | Add +11.0% | 684,600 | $746K |
| Legato Capital Management LLC | 0.07% | No change | 621,409 | $677K |
| Goldman Sachs Group Inc. | 0.00% | New | 368,632 | $402K |
| Bank of New York Mellon Corp | 0.00% | Reduce -30.0% | 350,002 | $382K |
| Jane Street Group, LLC | 0.00% | Add +72.4% | 335,704 | $366K |
| State Street Corp. | 0.00% | Add +94.8% | 303,900 | $331K |
| BlackRock, Inc. | 0.00% | Add +108.3% | 265,486 | $289K |
| Savvy Advisors, Inc. | 0.01% | Add +18.8% | 227,000 | $247K |
| XTX Topco Ltd | 0.01% | Add +50.8% | 204,717 | $223K |
| Northern Trust Corp. | 0.00% | Add +49.3% | 140,483 | $153K |
| Centiva Capital, LP | 0.01% | New | 122,228 | $133K |
| Bridgeway Capital Management, LLC | 0.00% | New | 94,794 | $103K |
| Two Sigma Investments, LP | 0.00% | Add +135.1% | 77,565 | $85K |
| Morgan Stanley | 0.00% | New | 73,714 | $80K |
| Quadrature Capital Ltd | 0.00% | Add +164.2% | 55,719 | $60K |
| Almanack Investment Partners, LLC. | 0.01% | No change | 50,000 | $55K |
| PKS Advisory Services, LLC | 0.01% | No change | 42,222 | $46K |
| Pathstone Holdings, LLC | 0.00% | Add +100.0% | 31,179 | $34K |
| Citigroup Inc. | 0.00% | Reduce -8.4% | 28,979 | $32K |
| Kestra Private Wealth Services, LLC | 0.00% | No change | 27,250 | $30K |
| Cubist Systematic Strategies, LLC | 0.00% | Reduce -72.1% | 26,266 | $29K |
| Two Sigma Securities, LLC | 0.00% | New | 25,739 | $28K |
| UBS Group AG | 0.00% | Add +28559.2% | 21,781 | $24K |
| Susquehanna International Group, LLP | 0.00% | Reduce -0.1% | 17,691 | $19K |
| Revisor Wealth Management LLC | 0.01% | New | 17,941 | $19K |
| Global Retirement Partners, LLC | 0.00% | Add +241.6% | 16,439 | $18K |
| Independent Advisor Alliance | 0.00% | New | 15,941 | $17K |
| TCFG Wealth Management, LLC | 0.01% | New | 15,596 | $17K |
| GK Wealth Management LLC | 0.01% | New | 15,204 | $17K |
| Blue Trust, Inc. | 0.00% | No change | 14,724 | $16K |
| Bay Colony Advisory Group, Inc d/b/a Bay Colony Advisors | 0.00% | New | 12,630 | $14K |
| Inscription Capital, LLC | 0.00% | No change | 12,500 | $14K |
| New Century Financial Group, LLC | 0.02% | No change | 12,000 | $13K |
| Creative Planning | 0.00% | No change | 10,000 | $11K |
| Tower Research Capital LLC (TRC) | 0.00% | New | 9,034 | $10K |
| Bank of America Corp. | 0.00% | Add +16.0% | 683 | $744 |
| Jones Financial Companies LLLP | 0.00% | New | 500 | $570 |
| Point72 (DIFC) Ltd | 0.00% | New | 309 | $337 |
| JPMorgan Chase & Co. | 0.00% | New | 31 | $34 |
"% of holder's portfolio" is CTM's weight in each manager's 13F, not the share of Castellum Inc. the manager owns.