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Castellum
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33 hedge funds and large institutions have $7.3M invested in Castellum in 2025 Q2 according to their latest regulatory filings, with 14 funds opening new positions, 8 increasing their positions, 2 reducing their positions, and 6 closing their positions.

New
Increased
Maintained
Reduced
Closed

300% more repeat investments, than reductions

Existing positions increased: 8 | Existing positions reduced: 2

133% more first-time investments, than exits

New positions opened: 14 | Existing positions closed: 6

121% more capital invested

Capital invested by funds: $3.31M → $7.3M (+$3.99M)

32% more funds holding

Funds holding: 25 → 33 (+8)

4.18% more ownership

Funds ownership: 3.9% → 8.08% (+4.2%)

Holders
33
Holders Change
+8
Holders Change %
+32%
% of All Funds
0.43%
Holding in Top 10
–
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
–
New
14
Increased
8
Reduced
2
Closed
6
Calls
–
Puts
–
Net Calls
–
Net Calls Change
–

Top Buyers

Rank Fund Capital Flow
1
EIM
Essex Investment Management
Massachusetts
+$2.15M
2
LCM
Legato Capital Management
California
+$638K
3
Vanguard Group
Vanguard Group
Pennsylvania
+$423K
4
Jane Street
Jane Street
New York
+$200K
5
SAI
Savvy Advisors Inc
New York
+$196K

Top Sellers

Rank Fund Capital Flow
1
IC
Inscription Capital
Texas
-$244K
2
Bank of New York Mellon
Bank of New York Mellon
New York
-$103K
3
TC
TownSquare Capital
Utah
-$47.4K
4
TRCT
Tower Research Capital (TRC)
New York
-$41.3K
5
MML Investors Services
MML Investors Services
Massachusetts
-$30K
Name Holding Trade Value Shares
Change 		Change in
Stake
EIM
1
Essex Investment Management
Massachusetts
$2.2M +$2.15M +2,090,500 New
Vanguard Group
2
Vanguard Group
Pennsylvania
$1.1M +$423K +412,350 +64%
LCM
3
Legato Capital Management
California
$652K +$638K +621,409 New
MWM
4
Meridian Wealth Management
Kentucky
$648K +$37K +36,000 +6%
Geode Capital Management
5
Geode Capital Management
Massachusetts
$629K +$186K +180,673 +43%
Bank of New York Mellon
6
Bank of New York Mellon
New York
$525K -$103K -100,001 -17%
Jane Street
7
Jane Street
New York
$204K +$200K +194,733 New
SAI
8
Savvy Advisors Inc
New York
$201K +$196K +191,100 New
State Street
9
State Street
Massachusetts
$164K – – –
XT
10
XTX Topco
Cayman Islands
$143K +$72.3K +70,377 +108%
BlackRock
11
BlackRock
New York
$134K – – –
VF
12
Virtu Financial
New York
$110K +$88.3K +85,997 +450%
CSS
13
Cubist Systematic Strategies
Connecticut
$98.9K +$27.2K +26,472 +39%
Northern Trust
14
Northern Trust
Illinois
$98.8K – – –
AIP
15
Almanack Investment Partners
Pennsylvania
$52.5K – – –
HF
16
HRT Financial
New York
$52K +$51.8K +50,395 New
PAS
17
PKS Advisory Services
New York
$44.3K – – –
Two Sigma Investments
18
Two Sigma Investments
New York
$34.6K +$33.9K +32,996 New
Citigroup
19
Citigroup
New York
$33.2K +$32.5K +31,628 New
KPWS
20
Kestra Private Wealth Services
Texas
$28.6K – – –
Squarepoint
21
Squarepoint
New York
$25.1K +$24.6K +23,940 New
QC
22
Quadrature Capital
United Kingdom
$22.2K +$21.7K +21,089 New
Susquehanna International Group
23
Susquehanna International Group
Pennsylvania
$18.6K +$20 +19 +0.1%
Pathstone Holdings
24
Pathstone Holdings
New Jersey
$16.4K +$16K +15,590 New
BTI
25
Blue Trust Inc
Georgia
$15.5K – – –
1
2

CTM Hedge Fund Activity: Q2 2025 in Review

33 of the 7,596 institutional investors tracked by Wall St. Rank reported a position in Castellum (CTM) for Q2 2025, worth a combined $7.3M — up 121% from $3.31M a quarter earlier.

Buyers outnumbered sellers: 14 funds opened new CTM positions and 6 closed out — a net gain of 8 holders — while 8 added to existing stakes and 2 trimmed.

The largest buyer was Essex Investment Management, opening a new position worth an estimated $2.15M. The largest seller was Inscription Capital, cutting an estimated $244K.

  • 33 institutional investors held Castellum (CTM) as of Q2 2025, up from 25 in Q1 2025.
  • Funds reported $7.3M of Castellum stock for Q2 2025, up 121% quarter-over-quarter.
  • 14 funds opened new Castellum positions in Q2 2025 and 6 closed out, a net change of +8 holders.
  • The largest Castellum buyer in Q2 2025 was Essex Investment Management, an estimated $2.15M added.
  • The largest Castellum seller in Q2 2025 was Inscription Capital, an estimated $244K sold.

Based on aggregated 13F filings for Q2 2025.