# CASTELLUM INC (CTM)

> Institutional ownership reported to the SEC as of Q2 2026, from Form 13F filings. Source: https://holderbook.com/stocks/CTM/

- Reporting holders: 35
- Reported value: $5.9M
- Shares held by institutions: 8,213,111 of 94,781,286 outstanding
- Held through calls: 0.0%
- Held through puts: 0.0%

A 13F reports long US equity positions only. Shorts, bonds, foreign listings and cash are not visible here, and positions are disclosed up to 45 days after the quarter ends.

## Largest holders

| Manager | Value | Shares | Share of their book | Quarters held |
|---|---|---|---|---|
| [VANGUARD CAPITAL MANAGEMENT LLC](https://holderbook.com/funds/2100119-vanguard-capital-management-llc/) | $2.2M | 3,093,768 | 0.0% | 2 |
| [Meridian Wealth Management, LLC](https://holderbook.com/funds/1697300-meridian-wealth-management-llc/) | $621.4K | 863,200 | 0.0% | 9 |
| [GEODE CAPITAL MANAGEMENT, LLC](https://holderbook.com/funds/1214717-geode-capital-management-llc/) | $587.6K | 816,037 | 0.0% | 15 |
| [CAPTRUST FINANCIAL ADVISORS](https://holderbook.com/funds/1512024-captrust-financial-advisors/) | $450.7K | 626,100 | 0.0% | 2 |
| [STATE STREET CORP](https://holderbook.com/funds/93751-state-street-corp/) | $437.6K | 607,800 | 0.0% | 14 |
| [VANGUARD FIDUCIARY TRUST CO](https://holderbook.com/funds/933478-vanguard-fiduciary-trust-co/) | $354.8K | 492,717 | 0.0% | 2 |
| [BlackRock, Inc.](https://holderbook.com/funds/2012383-blackrock-inc/) | $191.1K | 265,486 | 0.0% | 6 |
| [Savvy Advisors, Inc.](https://holderbook.com/funds/2003633-savvy-advisors-inc/) | $158.6K | 220,300 | 0.0% | 5 |
| [UBS Group AG](https://holderbook.com/funds/1610520-ubs-group-ag/) | $150.4K | 208,958 | 0.0% | 7 |
| [NORTHERN TRUST CORP](https://holderbook.com/funds/73124-northern-trust-corp/) | $123.4K | 171,420 | 0.0% | 15 |
| [Virtu Financial LLC](https://holderbook.com/funds/1533964-virtu-financial-llc/) | $121.0K | 168,401 | 0.0% | 1 |
| [JANE STREET GROUP, LLC](https://holderbook.com/funds/1595888-jane-street-group-llc/) | $92.9K | 129,071 | 0.0% | 5 |
| [BRIDGEWAY CAPITAL MANAGEMENT, LLC](https://holderbook.com/funds/1107261-bridgeway-capital-management-llc/) | $68.2K | 94,794 | 0.0% | 4 |
| [HUB Investment Partners, LLC](https://holderbook.com/funds/1841815-hub-investment-partners-llc/) | $41.3K | 57,414 | 0.0% | 1 |
| [Creative Planning](https://holderbook.com/funds/1540235-creative-planning/) | $36.0K | 50,000 | 0.0% | 6 |
| [Almanack Investment Partners, LLC.](https://holderbook.com/funds/1680613-almanack-investment-partners-llc/) | $36.0K | 50,000 | 0.0% | 15 |
| [TWO SIGMA SECURITIES, LLC](https://holderbook.com/funds/1450144-two-sigma-securities-llc/) | $29.2K | 40,530 | 0.0% | 2 |
| [ARQ WEALTH ADVISORS, LLC](https://holderbook.com/funds/1811827-arq-wealth-advisors-llc/) | $22.8K | 35,000 | 0.0% | 1 |
| [Pathstone Holdings, LLC](https://holderbook.com/funds/2011612-pathstone-holdings-llc/) | $22.4K | 31,179 | 0.0% | 5 |
| [Vanguard Global Advisers, LLC](https://holderbook.com/funds/1811242-vanguard-global-advisers-llc/) | $19.7K | 27,344 | 0.0% | 2 |
| [KESTRA PRIVATE WEALTH SERVICES, LLC](https://holderbook.com/funds/1649451-kestra-private-wealth-services-llc/) | $19.6K | 27,250 | 0.0% | 15 |
| [CAPITAL ADVISORS INC/OK](https://holderbook.com/funds/860828-capital-advisors-inc-ok/) | $15.8K | 22,000 | 0.0% | 2 |
| [XTX Topco Ltd](https://holderbook.com/funds/1828301-xtx-topco-ltd/) | $15.8K | 21,910 | 0.0% | 1 |
| [ACT Advisors, LLC.](https://holderbook.com/funds/1842554-act-advisors-llc/) | $15.2K | 21,074 | 0.0% | 1 |
| [PKS Advisory Services, LLC](https://holderbook.com/funds/1605401-pks-advisory-services-llc/) | $13.6K | 18,931 | 0.0% | 1 |

## Quarter by quarter

| Quarter | Holders | Reported value |
|---|---|---|
| Q2 2026 | 35 | $5.9M |
| Q1 2026 | 27 | $4.6M |
| Q4 2025 | 40 | $11.7M |
| Q3 2025 | 42 | $9.3M |
| Q2 2025 | 33 | $7.3M |
| Q1 2025 | 25 | $3.3M |
| Q4 2024 | 20 | $9.5M |
| Q3 2024 | 17 | $265.6K |
| Q2 2024 | 20 | $965.6K |
| Q1 2024 | 19 | $1.6M |
| Q4 2023 | 19 | $534.7K |
| Q3 2023 | 17 | $262.2K |