OS Therapies Incorporated (OSTX) Ownership
OSTX ownership summary
as of October 18, 2026- Institutions
- 6.3% of shares outstanding
- Insiders
- 21.12% of shares outstanding
- Shares outstanding
- 46.8M
- Float
- 40.4M shares available to trade
- Short interest
- 5.95% 2.6M shares short
- Days to cover
- 3.57 short interest down 6.0% vs prior month
- Institutions 6.25%
- Insiders 21.12%
- Other investors 72.63%
OSTX insider transactions
latest 1| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2025-05-07 | Shalom Auerbach | Sell | $2.00 | 82,000 | $164,000 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
OSTX shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns OSTX
Institutional investors own 6.3% of OS Therapies's shares and insiders 21.12%. Short interest is 5.95% of the float, or 3.57 days of average trading volume. The share count rose 118.1% since 2021.
Related: OSTX analyst forecast, OSTX key metrics. See the OSTX stock overview for the latest quote and news.
OSTX ownership FAQ
What percentage of OS Therapies is owned by institutions?
Institutions hold 6.3% of OS Therapies's shares outstanding; insiders hold 21.12%.
What is OS Therapies's short interest?
2.6M shares of OS Therapies were sold short, 5.95% of the float; at the average daily volume it would take 3.57 days to cover.
Are insiders buying or selling OS Therapies?
Of the latest 1 reported insider transactions in OS Therapies (since May 7, 2025), 0 were purchases and 1 were sales.
How many shares of OS Therapies are outstanding?
OS Therapies has 46.8M shares outstanding, of which 40.4M are in the public float.