CastellumCTM
13F holders, Q1 2026 (March 31)27holders −13
5new positions
19sold out
$0.59avg. 13F price*
At the end of Q1 2026, 27 institutions reported holding Castellum Inc. (CTM) in their 13F filings, down 13 from Q4 2025. 5 opened new positions and 19 sold out. The largest holders were Vanguard Capital Management LLC ($1.8M), Geode Capital Management, LLC ($557K) and Meridian Wealth Management, LLC ($463K).
- Company
- Castellum Inc.
- CUSIP
- 14838T204
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q4 2025 → Q1 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 5 | $422K |
| Exits | 19 | $3.5M |
All 13F filers, Q4 2025 → Q1 2026: 930,593 shares bought and 6,225,495 shares sold, net −5,294,902 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 27 holders
| Vanguard Capital Management LLC | 0.00% | — | 3,081,257 | $1.8M |
| Geode Capital Management, LLC | 0.00% | Add +22.1% | 944,899 | $557K |
| Meridian Wealth Management, LLC | 0.02% | Add +5.5% | 785,800 | $463K |
| Captrust Financial Advisors | 0.00% | New | 626,100 | $369K |
| Vanguard Fiduciary Trust Co. | 0.00% | — | 418,324 | $247K |
| State Street Corp. | 0.00% | No change | 303,900 | $179K |
| BlackRock, Inc. | 0.00% | No change | 265,486 | $157K |
| Jane Street Group, LLC | 0.00% | Reduce -31.1% | 236,774 | $140K |
| Savvy Advisors, Inc. | 0.00% | No change | 221,800 | $131K |
| Northern Trust Corp. | 0.00% | Reduce -13.6% | 181,902 | $107K |
| UBS Group AG | 0.00% | Reduce -92.9% | 153,529 | $91K |
| Sei Investments Co. | 0.00% | Reduce -63.5% | 121,574 | $72K |
| Bridgeway Capital Management, LLC | 0.00% | No change | 94,794 | $56K |
| Almanack Investment Partners, LLC. | 0.01% | No change | 50,000 | $29K |
| HRT Financial LP | 0.00% | New | 33,836 | $19K |
| Pathstone Holdings, LLC | 0.00% | No change | 31,179 | $18K |
| Vanguard Global Advisers, LLC | 0.00% | — | 27,344 | $16K |
| Kestra Private Wealth Services, LLC | 0.00% | No change | 27,250 | $16K |
| Capital Advisors Inc. | 0.00% | New | 22,000 | $13K |
| Ground Swell Capital, LLC | 0.03% | New | 21,090 | $12K |
| Creative Planning | 0.00% | Add +1.6% | 20,320 | $12K |
| Two Sigma Securities, LLC | 0.00% | New | 15,222 | $9K |
| Blue Trust, Inc. | 0.00% | No change | 14,724 | $9K |
| Inscription Capital, LLC | 0.00% | No change | 12,500 | $7K |
| Welch Group, LLC | 0.00% | No change | 10,000 | $6K |
| Citigroup Inc. | 0.00% | Reduce -73.8% | 7,040 | $4K |
| Jones Financial Companies LLLP | 0.00% | Add +3.2% | 6,366 | $4K |
"% of holder's portfolio" is CTM's weight in each manager's 13F, not the share of Castellum Inc. the manager owns.