Delisting risk
Castellum
Federal cyber, electronic-warfare, engineering, and mission-support contractor.
$0.6170
After-hours close+0.02 (+2.66%)
At close$0.6010(−1.14%)
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Breakdown13F · Form 4
Institutions 8.17%Insiders —
Shares outstanding 94.70M · Float 74.43M · 78.6% free float
Institutions13F, as of Mar 31, 2026
27 holders · 7.74M shares · 8 new positions · 12 increased · 5 reduced · 21 closed
| Holder | Shares | % outstanding | Chg q/q | Filed |
|---|---|---|---|---|
| Vanguard Capital Management LLC | 3.08M | 3.25% | +3.08Mnew | May 15, 2026 |
| Geode Capital Management, LLC | 944.9K | 1.00% | +171.2K | May 15, 2026 |
| Meridian Wealth Management, LLC | 785.8K | 0.83% | +40.7K | May 6, 2026 |
| Captrust Financial Advisors | 626.1K | 0.66% | +626.1Knew | May 15, 2026 |
| Vanguard Fiduciary Trust Co | 418.3K | 0.44% | +418.3Knew | May 8, 2026 |
| State Street Corp | 303.9K | 0.32% | 0 | May 15, 2026 |
| BlackRock, Inc. | 265.5K | 0.28% | 0 | May 13, 2026 |
| Jane Street Group, LLC | 236.8K | 0.25% | −107.1K | May 12, 2026 |
Beneficial owners13D/G · 5% or more, as filed
No 13D/G filer at 5% or more on record.
InsidersForm 4
Latest trades
Nothing filed in the last 12 months.
CongressHouse and Senate disclosures
Not reported.