Castellum
40 hedge funds and large institutions have $11.7M invested in Castellum in 2025 Q4 according to their latest regulatory filings, with 8 funds opening new positions, 12 increasing their positions, 11 reducing their positions, and 8 closing their positions.
27% more capital invested
Capital invested by funds: $9.27M → $11.7M (+$2.46M)
4.59% more ownership
Funds ownership: 9.15% → 13.73% (+4.6%)
9% more repeat investments, than reductions
Existing positions increased: 12 | Existing positions reduced: 11
0% more first-time investments, than exits
New positions opened: 8 | Existing positions closed: 8
5% less funds holding
Funds holding: 42 → 40 (-2)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Vanguard Group
Malvern,
Pennsylvania
|
+$2.34M |
| 2 |
UBS Group
Zurich,
Switzerland
|
+$2.28M |
| 3 |
SEI Investments
Oaks,
Pennsylvania
|
+$356K |
| 4 |
QC
Quadrature Capital
London,
United Kingdom
|
+$173K |
| 5 |
Susquehanna International Group
Bala Cynwyd,
Pennsylvania
|
+$90.6K |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Bank of New York Mellon
New York
|
-$267K |
| 2 |
XT
XTX Topco
George Town,
Cayman Islands
|
-$223K |
| 3 |
CC
Centiva Capital
New York
|
-$110K |
| 4 |
Morgan Stanley
New York
|
-$80.3K |
| 5 |
EIM
Essex Investment Management
Boston,
Massachusetts
|
-$42.3K |
CTM Hedge Fund Activity: Q4 2025 in Review
40 of the 8,270 institutional investors tracked by Wall St. Rank reported a position in Castellum (CTM) for Q4 2025, worth a combined $11.7M — up 27% from $9.27M a quarter earlier.
Fund positioning in CTM was balanced in Q4 2025: 8 funds opened new positions, 8 closed out, 12 added to existing stakes and 11 trimmed.
The largest buyer was Vanguard Group, adding an estimated $2.34M. The largest seller was Bank of New York Mellon, cutting an estimated $267K.
- 40 institutional investors held Castellum (CTM) as of Q4 2025, down from 42 in Q3 2025.
- Funds reported $11.7M of Castellum stock for Q4 2025, up 27% quarter-over-quarter.
- 8 funds opened new Castellum positions in Q4 2025 and 8 closed out, a net change of 0 holders.
- The largest Castellum buyer in Q4 2025 was Vanguard Group, an estimated $2.34M added.
- The largest Castellum seller in Q4 2025 was Bank of New York Mellon, an estimated $267K sold.
Based on aggregated 13F filings for Q4 2025.