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OSTX

OS Therapies Inc
OSTX

25 hedge funds and large institutions have $3.07M invested in OS Therapies Inc in 2025 Q3 according to their latest regulatory filings, with 13 funds opening new positions, 5 increasing their positions, 2 reducing their positions, and 1 closing their positions.

New
Increased
Maintained
Reduced
Closed

1,200% more first-time investments, than exits

New positions opened: 13 | Existing positions closed: 1

170% more capital invested

Capital invested by funds: $1.13M → $3.07M (+$1.93M)

150% more repeat investments, than reductions

Existing positions increased: 5 | Existing positions reduced: 2

92% more funds holding

Funds holding: 13 → 25 (+12)

2.79% more ownership

Funds ownership: 2.15% → 4.94% (+2.8%)

Holders
25
Holders Change
+12
Holders Change %
+92.31%
% of All Funds
0.33%
Holding in Top 10
–
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
–
New
13
Increased
5
Reduced
2
Closed
1
Calls
–
Puts
–
Net Calls
–
Net Calls Change
–

Top Buyers

Rank Fund Capital Flow
1
Marshall Wace
Marshall Wace
United Kingdom
+$393K
2
Vanguard Group
Vanguard Group
Pennsylvania
+$373K
3
Geode Capital Management
Geode Capital Management
Massachusetts
+$372K
4
Millennium Management
Millennium Management
New York
+$185K
5
Two Sigma Investments
Two Sigma Investments
New York
+$171K

Top Sellers

Rank Fund Capital Flow
1
UBS Group
UBS Group
Switzerland
-$104K
2
XT
XTX Topco
Cayman Islands
-$63K
3
JP Morgan Chase
JP Morgan Chase
New York
-$612
Name Holding Trade Value Shares
Change 		Change in
Stake
CM
1
CM Management
Florida
$784K +$49.5K +25,000 +7%
Marshall Wace
2
Marshall Wace
United Kingdom
$389K +$393K +198,552 New
Vanguard Group
3
Vanguard Group
Pennsylvania
$369K +$373K +188,263 New
Geode Capital Management
4
Geode Capital Management
Massachusetts
$368K +$372K +187,688 New
Millennium Management
5
Millennium Management
New York
$183K +$185K +93,574 New
Two Sigma Investments
6
Two Sigma Investments
New York
$169K +$171K +86,247 New
VF
7
Virtu Financial
New York
$149K +$108K +54,269 +252%
Northern Trust
8
Northern Trust
Illinois
$110K +$111K +56,263 New
State Street
9
State Street
Massachusetts
$98.6K +$99.7K +50,300 New
BlackRock
10
BlackRock
New York
$94.4K +$35.4K +17,882 +59%
ISL
11
Ingalls & Snyder LLC
New York
$72K – – –
BCM
12
Bridgeway Capital Management
Texas
$49K – – –
GSC
13
Ground Swell Capital
South Carolina
$40.1K +$40.5K +20,462 New
Mercer Global Advisors
14
Mercer Global Advisors
Colorado
$40.1K +$40.5K +20,440 New
Stifel Financial
15
Stifel Financial
Missouri
$29.4K – – –
Susquehanna International Group
16
Susquehanna International Group
Pennsylvania
$29.3K +$29.6K +14,961 New
SMH
17
Sanders Morris Harris
Texas
$23.5K +$23.8K +12,000 New
TSS
18
Two Sigma Securities
New York
$20.1K +$20.3K +10,237 New
FSC
19
Full Sail Capital
Oklahoma
$20K – – –
Jones Financial Companies
20
Jones Financial Companies
Missouri
$16.1K +$15.6K +7,867 New
TRCT
21
Tower Research Capital (TRC)
New York
$8.17K +$3.2K +1,617 +63%
Morgan Stanley
22
Morgan Stanley
New York
$1.96K +$515 +260 +35%
UBS Group
23
UBS Group
Switzerland
$445 -$104K -52,590 -100%
AAG
24
Armstrong Advisory Group
Massachusetts
$196 – – –
JP Morgan Chase
25
JP Morgan Chase
New York
$25 -$612 -309 -96%
1
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OSTX Hedge Fund Activity: Q3 2025 in Review

25 of the 7,625 institutional investors tracked by Wall St. Rank reported a position in OS Therapies Inc (OSTX) for Q3 2025, worth a combined $3.07M — up 170% from $1.13M a quarter earlier.

Buyers outnumbered sellers: 13 funds opened new OSTX positions and 1 closed out — a net gain of 12 holders — while 5 added to existing stakes and 2 trimmed.

The largest buyer was Marshall Wace, opening a new position worth an estimated $393K. The largest seller was UBS Group, cutting an estimated $104K.

  • 25 institutional investors held OS Therapies Inc (OSTX) as of Q3 2025, up from 13 in Q2 2025.
  • Funds reported $3.07M of OS Therapies Inc stock for Q3 2025, up 170% quarter-over-quarter.
  • 13 funds opened new OS Therapies Inc positions in Q3 2025 and 1 closed out, a net change of +12 holders.
  • The largest OS Therapies Inc buyer in Q3 2025 was Marshall Wace, an estimated $393K added.
  • The largest OS Therapies Inc seller in Q3 2025 was UBS Group, an estimated $104K sold.

Based on aggregated 13F filings for Q3 2025.