OS Therapies Incorporated (OSTX) short interest & short volume · 17.1% of float short
OS Therapies Incorporated official short interest (FINRA, twice monthly) and daily short volume (FINRA Reg SHO), with history, % of float and days to cover.
What changed
OSTX short interest rose 8.7% to 2.8M shares in the Oct 15, 2026 report (17.1% of float, 2.9 days to cover). Daily short volume averaged 40.9% of volume over the last 20 sessions, down from 43.1% the 20 sessions before, the 3rd percentile of its own 20-day averages since Sep 23, 2025.
Short interest
Official, twice monthly · settled Oct 15, 2026
- Shares short
- 2.8M
- prior 2.6M
- % of float
- 17.1%
- float 16.5M
- Days to cover
- 2.9
- avg vol 964K
- Change vs prior report
- +8.7%
Days to cover is short interest divided by FINRA's average daily volume for the period: how many average days of trading it would take shorts to buy back.
% of float uses the current float for every report (no float was stored with older reports).
Source: FINRA equity short interest (twice monthly) · Settlement Oct 15, 2026
Daily short volume
Share of each day's volume sold short · FINRA Reg SHO
- Latest (Nov 2)
- 46.2%
- 234K of 505K
- 20-day average
- 40.9%
- prior 43.1%
- Percentile vs own history
- 3rd
- 233 periods since 2025
Loading prices…
Source: FINRA Reg SHO daily short sale volume · Latest Nov 2, 2026
Short squeeze score (model)
Price since settlement: -17.7%
Model, not a forecast: 40 pts short interest % of float (full at 30%), 25 pts days to cover (full at 10), 15 pts rise in short interest since the prior report (full at +50%), 20 pts price gain since the settlement date (full at +25%). Missing inputs score 0.
OSTX's squeeze score and its inputs with Lician Pro.Start 3-day trial — $149/yr
Market-wide: most shorted stocks, biggest changes and unusual short volume · OSTX overview
| Date | Short | Total | Short % of volume |
|---|---|---|---|
| 2026-11-02 | 233,704 | 505,465 | 46.2% |
| 2026-10-30 | 98,383 | 207,372 | 47.4% |
| 2026-10-29 | 72,035 | 229,276 | 31.4% |
| 2026-10-28 | 57,144 | 173,703 | 32.9% |
| 2026-10-27 | 61,099 | 147,310 | 41.5% |
| 2026-10-26 | 93,952 | 126,351 | 74.4% |
| 2026-10-23 | 40,361 | 75,383 | 53.5% |
| 2026-10-22 | 128,800 | 230,596 | 55.9% |
| 2026-10-21 | 77,425 | 178,744 | 43.3% |
| 2026-10-20 | 77,288 | 189,979 | 40.7% |
Healthcare peers with similar quant ratings
OSTX among 532 rated Healthcare stocks (Lician quant rating, Nov 4, 2026). How the rating works
- QTTB short interest5.00 · Strong Buy · stock
- AVAH short interest4.99 · Strong Buy · stock
- CDNA short interest4.98 · Strong Buy · stock
- HALO short interest4.97 · Strong Buy · stock
- OSCR short interest4.97 · Strong Buy · stock
- BTSG short interest4.96 · Strong Buy
- REGN short interest4.95 · Strong Buy · stock
- CON short interest4.94 · Strong Buy · stock
OSTX short interest FAQ
What is OSTX's short interest?
OS Therapies Incorporated (OSTX) had 2.8M shares sold short and not yet covered in FINRA's Oct 15, 2026 settlement report, 17.1% of its 16.5M-share float.
How many days to cover does OSTX have?
2.9 days: 2.8M shares short divided by an average daily volume of 964K for the Oct 15, 2026 period.
Is OSTX short interest rising or falling?
OSTX short interest rose (+8.7%) from 2.6M to 2.8M shares in the Oct 15, 2026 report.
Is OSTX a short squeeze candidate?
Lician's squeeze watch scores OSTX 33 out of 100 (low) from the Oct 15, 2026 report: short interest % of float 22.8/40, days to cover 7.3/25, change in short interest vs prior report 2.6/15, price change since settlement date 0/20. It is a transparent model of how crowded the short side is, not a forecast that a squeeze will happen.
What share of OSTX daily volume is sold short?
40.9% on average over the last 20 sessions to Nov 2, 2026 (FINRA Reg SHO daily short volume; the 3rd percentile of its own 20-day averages). Short volume counts market makers' same-day short sales, so it is not short interest.
What was OSTX's latest FINRA short volume?
On Nov 2, 2026, cached FINRA short volume for OS Therapies Incorporated (OSTX) was 233,704 shares, 46.2% of 505,465 total volume.
How many OSTX short-volume sessions are listed on this page?
This page lists 10 cached FINRA short-volume sessions for OS Therapies Incorporated (OSTX), from Oct 20, 2026 through Nov 2, 2026.
How did OSTX short volume percent change from the prior cached session?
Cached FINRA short volume for OS Therapies Incorporated (OSTX) moved from 47.4% on Oct 30, 2026 to 46.2% on Nov 2, 2026, down 1.2 percentage points.
Not investment advice. Figures as filed or reported, not a live feed.