OS Therapies Inc
OSTX
29 hedge funds and large institutions have $4.09M invested in OS Therapies Inc in 2026 Q1 according to their latest regulatory filings, with 11 funds opening new positions, 8 increasing their positions, 2 reducing their positions, and 6 closing their positions.
300% more repeat investments, than reductions
Existing positions increased: 8 | Existing positions reduced: 2
83% more first-time investments, than exits
New positions opened: 11 | Existing positions closed: 6
64% more capital invested
Capital invested by funds: $2.49M → $4.09M (+$1.6M)
16% more funds holding
Funds holding: 25 → 29 (+4)
3.19% more ownership
Funds ownership: 5.04% → 8.23% (+3.2%)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Susquehanna International Group
Bala Cynwyd,
Pennsylvania
|
+$637K |
| 2 |
UBS Group
Zurich,
Switzerland
|
+$469K |
| 3 |
HFS
Howard Financial Services
Dallas,
Texas
|
+$348K |
| 4 |
BPA
Beacon Pointe Advisors
Newport Beach,
California
|
+$88.7K |
| 5 |
Geode Capital Management
Boston,
Massachusetts
|
+$48.3K |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Marshall Wace
London,
United Kingdom
|
-$154K |
| 2 |
Two Sigma Investments
New York
|
-$86.8K |
| 3 |
Millennium Management
New York
|
-$43.1K |
| 4 |
Northern Trust
Chicago,
Illinois
|
-$7.46K |
| 5 |
Royal Bank of Canada
Toronto,
Ontario, Canada
|
-$1K |
| Name | Holding | Trade Value |
Shares Change |
Change in Stake |
|
|---|---|---|---|---|---|
|
TRCT
26
Tower Research Capital (TRC)
New York
| $5.89K | +$5.81K | +4,091 | +4,649% |
|
|
AAG
27
Armstrong Advisory Group
Needham,
Massachusetts
| $141 | – | – | – |
|
|
CIAM
28
Caitong International Asset Management
Hong Kong
| $24 | +$24 | +17 | New |
|
29
Fidelity Investments
Boston,
Massachusetts
| $2 | +$3 | +2 | New |
|
|
30
Marshall Wace
London,
United Kingdom
| – | -$154K | -109,949 | Closed |
|
|
31
Millennium Management
New York
| – | -$43.1K | -30,785 | Closed |
|
|
32
Royal Bank of Canada
Toronto,
Ontario, Canada
| – | -$1K | -480 | Closed |
|
33
Northwestern Mutual Wealth Management
Milwaukee,
Wisconsin
| – | -$35 | -25 | Closed |
|
34
Bank of America
Charlotte,
North Carolina
| – | -$32 | -23 | Closed |
|
OSTX Hedge Fund Activity: Q1 2026 in Review
29 of the 8,128 institutional investors tracked by Wall St. Rank reported a position in OS Therapies Inc (OSTX) for Q1 2026, worth a combined $4.09M — up 64% from $2.49M a quarter earlier.
Buyers outnumbered sellers: 11 funds opened new OSTX positions and 6 closed out — a net gain of 5 holders — while 8 added to existing stakes and 2 trimmed.
The largest buyer was Susquehanna International Group, opening a new position worth an estimated $637K. The largest seller was Marshall Wace, exiting entirely with an estimated $154K sold.
- 29 institutional investors held OS Therapies Inc (OSTX) as of Q1 2026, up from 25 in Q4 2025.
- Funds reported $4.09M of OS Therapies Inc stock for Q1 2026, up 64% quarter-over-quarter.
- 11 funds opened new OS Therapies Inc positions in Q1 2026 and 6 closed out, a net change of +5 holders.
- The largest OS Therapies Inc buyer in Q1 2026 was Susquehanna International Group, an estimated $637K added.
- The largest OS Therapies Inc seller in Q1 2026 was Marshall Wace, an estimated $154K sold.
Based on aggregated 13F filings for Q1 2026.