Castellum, Inc. (CTM) — Institutional Holders, Q2 2026
35 institutional investment managers reported a CTM position on SEC Form 13F-HR for the quarter ended June 30, 2026, with a combined reported value of $5.7M. Every filer is listed below, ranked by position value. Put and call option positions are excluded, and a firm filing several lots or share classes is shown once with its total.
CTM in Q2 2026: what funds did
Funds that filed a 13F for both Q1 2026 and Q2 2026, by what they did with the common stock. Share counts are adjusted for any split between the two quarters; dollar figures are the change in shares at this quarter’s price.
Biggest buyers
- Virtu FinancialNew · +168,401 sh+$121.2K
- Meridian Wealth ManagementAdded · +77,400 sh+$55.7K
- VANGUARD FIDUCIARYAdded · +74,393 sh+$53.6K
- TCG Advisory ServicesNew · +57,414 sh+$41.3K
- UBS Group AGAdded · +55,429 sh+$39.9K
Biggest sellers
- GEODE CAPITAL MANAGEMENTTrimmed · -128,862 sh-$92.8K
- SEI INVESTMENTSSold out · -121,574 sh-$87.5K
- JANE STREET GROUPTrimmed · -107,703 sh-$77.5K
- HRT FINANCIALSold out · -33,836 sh-$24.4K
- Ground Swell CapitalSold out · -21,090 sh-$15.2K
CTM 13F holders ranked 1–35 of 35
| # | Institution | Shares | Value | % of portfolio | QoQShares vs Q1 2026 |
|---|---|---|---|---|---|
| 1 | VANGUARD CAPITAL MANAGEMENT#1 · 3,093,768 sh | 3,093,768 | $2.2M | 0.00% | +0.4% |
| 2 | Meridian Wealth Management#2 · 863,200 sh | 863,200 | $621.4K | 0.02% | +9.8% |
| 3 | GEODE CAPITAL MANAGEMENT#3 · 816,037 sh | 816,037 | $587.6K | 0.00% | -13.6% |
| 4 | CAPTRUST FINANCIAL ADVISORS#4 · 626,100 sh | 626,100 | $450.7K | <0.01% | 0.0% |
| 5 | VANGUARD FIDUCIARY#5 · 492,717 sh | 492,717 | $354.8K | <0.01% | +17.8% |
| 6 | STATE STREET#6 · 303,900 sh | 303,900 | $218.8K | 0.00% | 0.0% |
| 7 | BlackRock#7 · 265,486 sh | 265,486 | $191.1K | 0.00% | 0.0% |
| 8 | Savvy Advisors#8 · 220,300 sh | 220,300 | $158.6K | <0.01% | -0.7% |
| 9 | UBS Group AG#9 · 208,958 sh | 208,958 | $150.4K | 0.00% | +36.1% |
| 10 | NORTHERN#10 · 171,420 sh | 171,420 | $123.4K | 0.00% | -5.8% |
| 11 | Virtu Financial#11 · 168,401 sh | 168,401 | $121.0K | <0.01% | New |
| 12 | JANE STREET GROUP#12 · 129,071 sh | 129,071 | $92.9K | 0.00% | -45.5% |
| 13 | BRIDGEWAY CAPITAL MANAGEMENT#13 · 94,794 sh | 94,794 | $68.2K | <0.01% | 0.0% |
| 14 | TCG Advisory Services#14 · 57,414 sh | 57,414 | $41.3K | <0.01% | New |
| 15 | Creative Planning#15 · 50,000 sh | 50,000 | $36.0K | 0.00% | +146.1% |
| 16 | Almanack Investment Partners#16 · 50,000 sh | 50,000 | $36.0K | <0.01% | 0.0% |
| 17 | TWO SIGMA SECURITIES#17 · 40,530 sh | 40,530 | $29.2K | <0.01% | +166.3% |
| 18 | ARQ WEALTH ADVISORS#18 · 35,000 sh | 35,000 | $22.8K | <0.01% | New |
| 19 | Pathstone#19 · 31,179 sh | 31,179 | $22.4K | <0.01% | 0.0% |
| 20 | Vanguard Global Advisers#20 · 27,344 sh | 27,344 | $19.7K | 0.00% | 0.0% |
| 21 | KESTRA PRIVATE WEALTH SERVICES#21 · 27,250 sh | 27,250 | $19.6K | <0.01% | 0.0% |
| 22 | CAPITAL ADVISORS#22 · 22,000 sh | 22,000 | $15.8K | <0.01% | 0.0% |
| 23 | XTX Topco Ltd#23 · 21,910 sh | 21,910 | $15.8K | <0.01% | New |
| 24 | ACT Advisors#24 · 21,074 sh | 21,074 | $15.2K | — | New |
| 25 | PKS Advisory Services#25 · 18,931 sh | 18,931 | $13.6K | — | New |
| 26 | Ronald Blue#26 · 14,724 sh | 14,724 | $10.6K | — | 0.0% |
| 27 | Inscription Capital#27 · 12,500 sh | 12,500 | $9.0K | <0.01% | 0.0% |
| 28 | Welch Group#28 · 10,000 sh | 10,000 | $7.2K | <0.01% | 0.0% |
| 29 | JONES FINANCIAL COMPANIES LLLP#29 · 6,366 sh | 6,366 | $4.5K | 0.00% | 0.0% |
| 30 | Tower Research Capital (TRC)#30 · 5,872 sh | 5,872 | $4.2K | <0.01% | New |
| 31 | Cape Investment Advisory#31 · 2,000 sh | 2,000 | $1.4K | — | New |
| 32 | TD Waterhouse Canada#32 · 500 sh | 500 | $361.00 | — | New |
| 33 | OSAIC#33 · 215 sh | 215 | $154.00 | 0.00% | New |
| 34 | HARBOUR INVESTMENTS#34 · 150 sh | 150 | $108.00 | 0.00% | New |
| 35 | Clearstead Advisors#35 · 100 sh | 100 | $72.00 | 0.00% | New |
Funds that sold out of CTM in Q2 2026 (4)
Held CTM at the end of Q1 2026 and filed a Q2 2026 13F without it. Not in the list above, because they no longer hold it. Largest prior position first.
| Institution | Shares sold | Value in Q1 2026 |
|---|---|---|
| SEI INVESTMENTS121,574 sh | 121,574 | $71.7K |
| HRT FINANCIAL33,836 sh | 33,836 | $19.0K |
| Ground Swell Capital21,090 sh | 21,090 | $12.4K |
| CITIGROUP7,040 sh | 7,040 | $4.2K |
Source: Form 13F-HR filings on SEC EDGAR, Q2 2026. Values are as reported by each manager at quarter end. “% of portfolio” is the position’s share of the manager’s total reported 13F value for the same quarter. “New” means the manager filed a 13F for Q1 2026 without this position; a dash means no comparison is available. Where a manager’s own filing is internally inconsistent its value is withheld and it is listed last. 13F data shows reported holdings, not recommendations.