OSTX
OS Therapies IncCompany with tickers: OSTX
CIK
1795091
CUSIP
68764Y207
Shares Outstanding
44,538,106
13F Activity (30d)
27 filings
25 filers
Holders: 29
Total Value: $4,085,560
Total Shares: 2,897,570
Institutional Ownership Trend
Holder Concentration
Across 29 13F filers · Δ vs Dec 31, 2025Top Holder
16.2%
−14.2 pts
Top 5
67.2%
−10.8 pts
Top 10
87.4%
−5.2 pts
HHI
1,053
Broadly held
−690
Quarterly Activity
vs Dec 31, 2025
New
11
Increased
8
Decreased
2
Sold Out
7
Unchanged
8
Holder count:
+4
Institutional value:
+64.4%
Shares held:
+63.2%
Top Buyers
vs Dec 31, 2025| Institution | Added | Now Holds | Open |
|---|---|---|---|
| Mega UBS Group AG | +330,522 | 348,678 | |
| Mega GEODE CAPITAL MANAGEMENT, LLC | +34,007 | 280,045 | |
| Mega STATE STREET CORP | +32,700 | 91,200 | |
| Mega JANE STREET GROUP, LLC | +12,576 | 40,316 | |
| Mega MORGAN STANLEY | +8,490 | 9,490 |
Top Sellers
vs Dec 31, 2025| Institution | Sold | Now Holds | Open |
|---|---|---|---|
| Mega TWO SIGMA INVESTMENTS, LP | −61,157 | 26,380 | |
| Mega NORTHERN TRUST CORP | −5,255 | 66,054 |
Top New Positions
vs Dec 31, 2025| Institution | Acquired | Value (USD) | Open |
|---|---|---|---|
| Mega VANGUARD CAPITAL MANAGEMENT LLC | 469,467 | $661,948 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | 448,737 | $632,719 | |
| Small HOWARD FINANCIAL SERVICES, LTD. | 245,436 | $346,064 | |
| Mega VANGUARD FIDUCIARY TRUST CO | 116,663 | $164,494 | |
| Mid Beacon Pointe Advisors, LLC | 62,507 | $88,134 |
Top Sold-Out Positions
vs Dec 31, 2025| Institution | Previously Held | Last Value (USD) | Open |
|---|---|---|---|
| Mega VANGUARD GROUP INC | 540,421 | $756,589 | |
| Large MARSHALL WACE, LLP | 109,949 | $153,928 | |
| Mega MILLENNIUM MANAGEMENT LLC | 30,785 | $43,099 | |
| Mega ROYAL BANK OF CANADA | 480 | $672 | |
| Small FNY Investment Advisers, LLC | 100 | $140 |
| Holder | Value (USD) | % of 13F | Shares | Type | Discretion | Filed | Open | |||
|---|---|---|---|---|---|---|---|---|---|---|
| Mega VANGUARD CAPITAL MANAGEMENT LLC | $661,948 | 16.20% | 469,467 | Shares | Defined | 2026-05-15 | ||||
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $632,719 | 15.49% | 448,737 | Shares | Other | 2026-05-15 | ||||
| Small CM Management, LLC | $564,000 | 13.80% | 400,000 | Shares | Sole | 2026-05-08 | ||||
| Mega UBS Group AG | $491,635 | 12.03% | 348,678 | Shares | Defined | 2026-05-05 | ||||
| Mega GEODE CAPITAL MANAGEMENT, LLC | $394,863 | 9.66% | 280,045 | Shares | Defined | 2026-05-15 | ||||
| Small HOWARD FINANCIAL SERVICES, LTD. | $346,064 | 8.47% | 245,436 | Shares | Sole | 2026-04-07 | ||||
| Mega VANGUARD FIDUCIARY TRUST CO Bank | $164,494 | 4.03% | 116,663 | Shares | Defined | 2026-05-08 | ||||
| Mega STATE STREET CORP | $128,592 | 3.15% | 91,200 | Shares | Defined | 2026-05-15 | ||||
| Mega NORTHERN TRUST CORP Bank | $93,136 | 2.28% | 66,054 | Shares | Defined | 2026-05-14 | ||||
| Mega BlackRock, Inc. | $91,327 | 2.24% | 64,772 | Shares | Sole | 2026-05-13 | ||||
| Mid Beacon Pointe Advisors, LLC | $88,134 | 2.16% | 62,507 | Shares | Sole | 2026-05-15 | ||||
| Mega JANE STREET GROUP, LLC | $56,845 | 1.39% | 40,316 | Shares | Defined | 2026-05-12 | ||||
| Mid INGALLS & SNYDER LLC | $51,713 | 1.27% | 36,676 | Shares | Other | 2026-05-13 | ||||
| Small SANDERS MORRIS HARRIS LLC | $45,120 | 1.10% | 32,000 | Shares | Sole | 2026-04-09 | ||||
| Mid XTX Topco Ltd | $44,587 | 1.09% | 31,622 | Shares | Defined | 2026-05-15 | ||||
| Mega TWO SIGMA INVESTMENTS, LP | $37,195 | 0.91% | 26,380 | Shares | Sole | 2026-05-15 | ||||
| Mid BRIDGEWAY CAPITAL MANAGEMENT, LLC | $35,250 | 0.86% | 25,000 | Shares | Sole | 2026-05-15 | ||||
| Mega Vanguard Global Advisers, LLC | $29,550 | 0.72% | 20,958 | Shares | Defined | 2026-05-08 | ||||
| Large HighTower Advisors, LLC | $21,432 | 0.52% | 15,200 | Shares | Sole | 2026-05-05 | ||||
| Large STIFEL FINANCIAL CORP | $21,150 | 0.52% | 15,000 | Shares | Defined | 2026-05-12 | ||||
| Small Stratos Wealth Advisors, LLC | $19,481 | 0.48% | 13,817 | Shares | Sole | 2026-04-28 | ||||
| Large JONES FINANCIAL COMPANIES LLLP | $18,218 | 0.45% | 12,921 | Shares | Sole | 2026-05-15 | ||||
| Large MERCER GLOBAL ADVISORS INC /ADV | $14,410 | 0.35% | 10,220 | Shares | Sole | 2026-05-15 | ||||
| Mega LPL Financial LLC | $14,259 | 0.35% | 10,113 | Shares | Sole | 2026-05-06 | ||||
| Mega MORGAN STANLEY | $13,380 | 0.33% | 9,490 | Shares | Defined | 2026-05-15 | ||||
| Mid Tower Research Capital LLC (TRC) | $5,892 | 0.14% | 4,179 | Shares | Defined | 2026-05-15 | ||||
| Small ARMSTRONG ADVISORY GROUP, INC | $141 | 0.00% | 100 | Shares | Sole | 2026-04-10 | ||||
| Small Caitong International Asset Management Co., Ltd | $23 | 0.00% | 17 | Shares | Sole | 2026-05-11 | ||||
| Mega FMR LLC | $2 | 0.00% | 2 | Shares | Defined | 2026-05-15 | ||||
| No holders match your search. | ||||||||||