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OSTX

OS Therapies Inc
OSTX

25 hedge funds and large institutions have $2.49M invested in OS Therapies Inc in 2025 Q4 according to their latest regulatory filings, with 7 funds opening new positions, 8 increasing their positions, 4 reducing their positions, and 6 closing their positions.

New
Increased
Maintained
Reduced
Closed

100% more repeat investments, than reductions

Existing positions increased: 8 | Existing positions reduced: 4

17% more first-time investments, than exits

New positions opened: 7 | Existing positions closed: 6

0.1% more ownership

Funds ownership: 4.94% → 5.04% (+0.1%)

0% more funds holding

Funds holding: 25 → 25 (0)

19% less capital invested

Capital invested by funds: $3.07M → $2.49M (-$580K)

Holders
25
Holders Change
–
Holders Change %
0%
% of All Funds
0.3%
Holding in Top 10
–
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
–
New
7
Increased
8
Reduced
4
Closed
6
Calls
–
Puts
–
Net Calls
–
Net Calls Change
–

Top Buyers

Rank Fund Capital Flow
1
Vanguard Group
Vanguard Group
Pennsylvania
+$635K
2
Geode Capital Management
Geode Capital Management
Massachusetts
+$105K
3
Jane Street
Jane Street
New York
+$50K
4
UBS Group
UBS Group
Switzerland
+$32.3K
5
Northern Trust
Northern Trust
Illinois
+$27.1K

Top Sellers

Rank Fund Capital Flow
1
Marshall Wace
Marshall Wace
United Kingdom
-$160K
2
VF
Virtu Financial
New York
-$149K
3
Millennium Management
Millennium Management
New York
-$113K
4
GSC
Ground Swell Capital
South Carolina
-$40.1K
5
Susquehanna International Group
Susquehanna International Group
Pennsylvania
-$29.3K
Name Holding Trade Value Shares
Change 		Change in
Stake
Vanguard Group
1
Vanguard Group
Pennsylvania
$757K +$635K +352,158 +187%
CM
2
CM Management
Florida
$560K – – –
Geode Capital Management
3
Geode Capital Management
Massachusetts
$344K +$105K +58,350 +31%
Marshall Wace
4
Marshall Wace
United Kingdom
$154K -$160K -88,603 -45%
Two Sigma Investments
5
Two Sigma Investments
New York
$123K +$2.33K +1,290 +1%
Northern Trust
6
Northern Trust
Illinois
$99.8K +$27.1K +15,046 +27%
BlackRock
7
BlackRock
New York
$86K +$23.9K +13,262 +28%
State Street
8
State Street
Massachusetts
$81.9K +$14.8K +8,200 +16%
ISL
9
Ingalls & Snyder LLC
New York
$51K – – –
Millennium Management
10
Millennium Management
New York
$43.1K -$113K -62,789 -67%
Jane Street
11
Jane Street
New York
$38.8K +$50K +27,740 New
BCM
12
Bridgeway Capital Management
Texas
$35K – – –
UBS Group
13
UBS Group
Switzerland
$25.4K +$32.3K +17,929 +7,898%
Stifel Financial
14
Stifel Financial
Missouri
$21K – – –
SWA
15
Stratos Wealth Advisors
Ohio
$19.3K +$24.9K +13,817 New
Jones Financial Companies
16
Jones Financial Companies
Missouri
$15.2K +$5.41K +3,000 +38%
Mercer Global Advisors
17
Mercer Global Advisors
Colorado
$14.3K -$18.4K -10,220 -50%
LPL Financial
18
LPL Financial
California
$14.2K +$18.2K +10,113 New
Morgan Stanley
19
Morgan Stanley
New York
$1.4K – – –
Royal Bank of Canada
20
Royal Bank of Canada
Ontario, Canada
$1K +$866 +480 New
AAG
21
Armstrong Advisory Group
Massachusetts
$140 – – –
TRCT
22
Tower Research Capital (TRC)
New York
$123 -$7.36K -4,079 -98%
Northwestern Mutual Wealth Management
23
Northwestern Mutual Wealth Management
Wisconsin
$35 +$45 +25 New
Bank of America
24
Bank of America
North Carolina
$32 +$41 +23 New
VF
25
Virtu Financial
New York
– -$149K -75,801 Closed
1
2

OSTX Hedge Fund Activity: Q4 2025 in Review

25 of the 8,223 institutional investors tracked by Wall St. Rank reported a position in OS Therapies Inc (OSTX) for Q4 2025, worth a combined $2.49M — down 19% from $3.07M a quarter earlier.

Buyers outnumbered sellers: 7 funds opened new OSTX positions and 6 closed out — a net gain of 1 holder — while 8 added to existing stakes and 4 trimmed.

The largest buyer was Vanguard Group, adding an estimated $635K. The largest seller was Marshall Wace, cutting an estimated $160K.

  • 25 institutional investors held OS Therapies Inc (OSTX) as of Q4 2025, unchanged from Q3 2025.
  • Funds reported $2.49M of OS Therapies Inc stock for Q4 2025, down 19% quarter-over-quarter.
  • 7 funds opened new OS Therapies Inc positions in Q4 2025 and 6 closed out, a net change of +1 holder.
  • The largest OS Therapies Inc buyer in Q4 2025 was Vanguard Group, an estimated $635K added.
  • The largest OS Therapies Inc seller in Q4 2025 was Marshall Wace, an estimated $160K sold.

Based on aggregated 13F filings for Q4 2025.