Aspen Aerogels Inc (ASPN) short interest & short volume · 8.0% of float short
Aspen Aerogels Inc official short interest (FINRA, twice monthly) and daily short volume (FINRA Reg SHO), with history, % of float and days to cover.
What changed
ASPN short interest was little changed at 6.1M shares in the Oct 15, 2026 report (8.0% of float, 7.6 days to cover). Daily short volume averaged 51.3% of volume over the last 20 sessions, up from 45.7% the 20 sessions before, the 99th percentile of its own 20-day averages since Sep 22, 2025.
Short interest
Official, twice monthly · settled Oct 15, 2026
- Shares short
- 6.1M
- prior 6.1M
- % of float
- 8.0%
- float 76.7M
- Days to cover
- 7.6
- avg vol 804K
- Change vs prior report
- +0.7%
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)
- 59.5%
- 165K of 277K
- 20-day average
- 51.3%
- prior 45.7%
- Percentile vs own history
- 99th
- 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: -8.1%
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.
ASPN'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 · ASPN overview
| Date | Short | Total | Short % of volume |
|---|---|---|---|
| 2026-11-02 | 164,758 | 276,847 | 59.5% |
| 2026-10-30 | 195,582 | 341,742 | 57.2% |
| 2026-10-29 | 146,601 | 202,289 | 72.5% |
| 2026-10-28 | 75,458 | 130,238 | 57.9% |
| 2026-10-27 | 70,304 | 203,758 | 34.5% |
| 2026-10-26 | 161,255 | 277,909 | 58.0% |
| 2026-10-23 | 117,268 | 201,627 | 58.2% |
| 2026-10-22 | 167,295 | 241,954 | 69.1% |
| 2026-10-21 | 144,362 | 277,673 | 52.0% |
| 2026-10-20 | 114,891 | 181,815 | 63.2% |
Industrials peers with similar quant ratings
ASPN is rated 1.89 of 5 among 418 rated Industrials stocks (Lician quant rating, Nov 4, 2026). How the rating works
- LNN short interest1.93 · Sell · stock
- AEBI short interest1.92 · Sell · stock
- TRC short interest1.91 · Sell · stock
- ESAB short interest1.90 · Sell · stock
- CMDB short interest1.88 · Sell
- ESOA short interest1.87 · Sell · stock
- NNBR short interest1.86 · Sell · stock
- BWXT short interest1.85 · Sell · stock
ASPN short interest FAQ
What is ASPN's short interest?
Aspen Aerogels Inc (ASPN) had 6.1M shares sold short and not yet covered in FINRA's Oct 15, 2026 settlement report, 8.0% of its 76.7M-share float.
How many days to cover does ASPN have?
7.6 days: 6.1M shares short divided by an average daily volume of 804K for the Oct 15, 2026 period.
Is ASPN short interest rising or falling?
ASPN short interest was little changed (+0.7%) from 6.1M to 6.1M shares in the Oct 15, 2026 report.
Is ASPN a short squeeze candidate?
Lician's squeeze watch scores ASPN 30 out of 100 (low) from the Oct 15, 2026 report: short interest % of float 10.7/40, days to cover 19.1/25, change in short interest vs prior report 0.2/15, 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 ASPN daily volume is sold short?
51.3% on average over the last 20 sessions to Nov 2, 2026 (FINRA Reg SHO daily short volume; the 99th percentile of its own 20-day averages). Short volume counts market makers' same-day short sales, so it is not short interest.
What was ASPN's latest FINRA short volume?
On Nov 2, 2026, cached FINRA short volume for Aspen Aerogels Inc (ASPN) was 164,758 shares, 59.5% of 276,847 total volume.
How many ASPN short-volume sessions are listed on this page?
This page lists 10 cached FINRA short-volume sessions for Aspen Aerogels Inc (ASPN), from Oct 20, 2026 through Nov 2, 2026.
How did ASPN short volume percent change from the prior cached session?
Cached FINRA short volume for Aspen Aerogels Inc (ASPN) moved from 57.2% on Oct 30, 2026 to 59.5% on Nov 2, 2026, up 2.3 percentage points.
Not investment advice. Figures as filed or reported, not a live feed.