Alto Neuroscience, Inc. (ANRO) short interest & short volume · 29.1% of float short
Alto Neuroscience, Inc. official short interest (FINRA, twice monthly) and daily short volume (FINRA Reg SHO), with history, % of float and days to cover.
What changed
ANRO short interest rose 11.7% to 5.2M shares in the Oct 15, 2026 report (29.1% of float, 7.5 days to cover). Daily short volume averaged 70.1% of volume over the last 20 sessions, down from 71.6% the 20 sessions before, the 82nd percentile of its own 20-day averages since Sep 22, 2025.
Short interest
Official, twice monthly · settled Oct 15, 2026
- Shares short
- 5.2M
- prior 4.7M
- % of float
- 29.1%
- float 17.9M
- Days to cover
- 7.5
- avg vol 694K
- Change vs prior report
- +11.7%
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)
- 66.8%
- 150K of 224K
- 20-day average
- 70.1%
- prior 71.6%
- Percentile vs own history
- 82nd
- 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: +0.4%
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.
ANRO'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 · ANRO overview
| Date | Short | Total | Short % of volume |
|---|---|---|---|
| 2026-11-02 | 149,860 | 224,162 | 66.8% |
| 2026-10-30 | 157,434 | 210,189 | 74.9% |
| 2026-10-29 | 112,406 | 156,444 | 71.8% |
| 2026-10-28 | 79,666 | 120,407 | 66.2% |
| 2026-10-27 | 89,663 | 211,183 | 42.5% |
| 2026-10-26 | 94,941 | 205,765 | 46.1% |
| 2026-10-23 | 124,582 | 147,784 | 84.3% |
| 2026-10-22 | 131,376 | 237,221 | 55.4% |
| 2026-10-21 | 190,820 | 260,754 | 73.2% |
| 2026-10-20 | 269,914 | 306,963 | 87.9% |
Healthcare peers with similar quant ratings
ANRO is rated 2.74 of 5 among 532 rated Healthcare stocks (Lician quant rating, Nov 4, 2026). How the rating works
- IPSC short interest2.77 · Hold · stock
- CTNM short interest2.76 · Hold · stock
- PRCT short interest2.76 · Hold · stock
- DSGN short interest2.75 · Hold · stock
- ACOG short interest2.73 · Hold · stock
- BMRN short interest2.73 · Hold · stock
- AZTA short interest2.72 · Hold · stock
- COLL short interest2.71 · Hold · stock
ANRO short interest FAQ
What is ANRO's short interest?
Alto Neuroscience, Inc. (ANRO) had 5.2M shares sold short and not yet covered in FINRA's Oct 15, 2026 settlement report, 29.1% of its 17.9M-share float.
How many days to cover does ANRO have?
7.5 days: 5.2M shares short divided by an average daily volume of 694K for the Oct 15, 2026 period.
Is ANRO short interest rising or falling?
ANRO short interest rose (+11.7%) from 4.7M to 5.2M shares in the Oct 15, 2026 report.
Is ANRO a short squeeze candidate?
Lician's squeeze watch scores ANRO 61 out of 100 (elevated) from the Oct 15, 2026 report: short interest % of float 38.8/40, days to cover 18.8/25, change in short interest vs prior report 3.5/15, price change since settlement date 0.3/20. It is a transparent model of how crowded the short side is, not a forecast that a squeeze will happen.
What share of ANRO daily volume is sold short?
70.1% on average over the last 20 sessions to Nov 2, 2026 (FINRA Reg SHO daily short volume; the 82nd percentile of its own 20-day averages). Short volume counts market makers' same-day short sales, so it is not short interest.
What was ANRO's latest FINRA short volume?
On Nov 2, 2026, cached FINRA short volume for Alto Neuroscience, Inc. (ANRO) was 149,860 shares, 66.8% of 224,162 total volume.
How many ANRO short-volume sessions are listed on this page?
This page lists 10 cached FINRA short-volume sessions for Alto Neuroscience, Inc. (ANRO), from Oct 20, 2026 through Nov 2, 2026.
How did ANRO short volume percent change from the prior cached session?
Cached FINRA short volume for Alto Neuroscience, Inc. (ANRO) moved from 74.9% on Oct 30, 2026 to 66.8% on Nov 2, 2026, down 8.1 percentage points.
Not investment advice. Figures as filed or reported, not a live feed.