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Castellum
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42 hedge funds and large institutions have $9.27M invested in Castellum in 2025 Q3 according to their latest regulatory filings, with 14 funds opening new positions, 16 increasing their positions, 4 reducing their positions, and 5 closing their positions.

New
Increased
Maintained
Reduced
Closed

300% more repeat investments, than reductions

Existing positions increased: 16 | Existing positions reduced: 4

180% more first-time investments, than exits

New positions opened: 14 | Existing positions closed: 5

27% more funds holding

Funds holding: 33 → 42 (+9)

27% more capital invested

Capital invested by funds: $7.3M → $9.27M (+$1.97M)

1.07% more ownership

Funds ownership: 8.08% → 9.15% (+1.1%)

Holders
42
Holders Change
+9
Holders Change %
+27.27%
% of All Funds
0.55%
Holding in Top 10
–
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
–
New
14
Increased
16
Reduced
4
Closed
5
Calls
–
Puts
–
Net Calls
–
Net Calls Change
–

Top Buyers

Rank Fund Capital Flow
1
Goldman Sachs
Goldman Sachs
New York
+$428K
2
Vanguard Group
Vanguard Group
Pennsylvania
+$263K
3
State Street
State Street
Massachusetts
+$172K
4
Jane Street
Jane Street
New York
+$164K
5
BlackRock
BlackRock
New York
+$160K

Top Sellers

Rank Fund Capital Flow
1
Bank of New York Mellon
Bank of New York Mellon
New York
-$174K
2
VF
Virtu Financial
New York
-$110K
3
CSS
Cubist Systematic Strategies
Connecticut
-$78.9K
4
HF
HRT Financial
New York
-$52K
5
Squarepoint
Squarepoint
New York
-$25.1K
Name Holding Trade Value Shares
Change 		Change in
Stake
EIM
1
Essex Investment Management
Massachusetts
$2.35M +$73.4K +63,117 +3%
Vanguard Group
2
Vanguard Group
Pennsylvania
$1.39M +$263K +225,937 +21%
Geode Capital Management
3
Geode Capital Management
Massachusetts
$789K +$144K +124,329 +21%
MWM
4
Meridian Wealth Management
Kentucky
$746K +$78.8K +67,800 +11%
LCM
5
Legato Capital Management
California
$677K – – –
Goldman Sachs
6
Goldman Sachs
New York
$402K +$428K +368,632 New
Bank of New York Mellon
7
Bank of New York Mellon
New York
$382K -$174K -149,999 -30%
Jane Street
8
Jane Street
New York
$366K +$164K +140,971 +72%
State Street
9
State Street
Massachusetts
$331K +$172K +147,900 +95%
BlackRock
10
BlackRock
New York
$289K +$160K +138,065 +108%
SAI
11
Savvy Advisors Inc
New York
$247K +$41.7K +35,900 +19%
XT
12
XTX Topco
Cayman Islands
$223K +$80.1K +68,921 +51%
Northern Trust
13
Northern Trust
Illinois
$153K +$53.9K +46,363 +49%
CC
14
Centiva Capital
New York
$133K +$142K +122,228 New
BCM
15
Bridgeway Capital Management
Texas
$103K +$110K +94,794 New
Two Sigma Investments
16
Two Sigma Investments
New York
$84.5K +$51.8K +44,569 +135%
Morgan Stanley
17
Morgan Stanley
New York
$80.3K +$85.7K +73,714 New
QC
18
Quadrature Capital
United Kingdom
$60.5K +$40.2K +34,630 +164%
AIP
19
Almanack Investment Partners
Pennsylvania
$54.5K – – –
PAS
20
PKS Advisory Services
New York
$46K – – –
Pathstone Holdings
21
Pathstone Holdings
New Jersey
$34K +$18.1K +15,589 +100%
Citigroup
22
Citigroup
New York
$31.6K -$3.08K -2,649 -8%
KPWS
23
Kestra Private Wealth Services
Texas
$29.7K – – –
CSS
24
Cubist Systematic Strategies
Connecticut
$28.6K -$78.9K -67,886 -72%
TSS
25
Two Sigma Securities
New York
$28.1K +$29.9K +25,739 New
1
2

CTM Hedge Fund Activity: Q3 2025 in Review

42 of the 7,621 institutional investors tracked by Wall St. Rank reported a position in Castellum (CTM) for Q3 2025, worth a combined $9.27M — up 27% from $7.3M a quarter earlier.

Buyers outnumbered sellers: 14 funds opened new CTM positions and 5 closed out — a net gain of 9 holders — while 16 added to existing stakes and 4 trimmed.

The largest buyer was Goldman Sachs, opening a new position worth an estimated $428K. The largest seller was Bank of New York Mellon, cutting an estimated $174K.

  • 42 institutional investors held Castellum (CTM) as of Q3 2025, up from 33 in Q2 2025.
  • Funds reported $9.27M of Castellum stock for Q3 2025, up 27% quarter-over-quarter.
  • 14 funds opened new Castellum positions in Q3 2025 and 5 closed out, a net change of +9 holders.
  • The largest Castellum buyer in Q3 2025 was Goldman Sachs, an estimated $428K added.
  • The largest Castellum seller in Q3 2025 was Bank of New York Mellon, an estimated $174K sold.

Based on aggregated 13F filings for Q3 2025.