QSI stock
QuantumSi Inc (QSI) short interest & short volume · 9.0% of float short
QuantumSi Inc official short interest (FINRA, twice monthly) and daily short volume (FINRA Reg SHO), with history, % of float and days to cover.
What changed
QSI short interest rose 11.6% to 13.2M shares in the Oct 15, 2026 report (9.0% of float, 1.0 days to cover). Daily short volume averaged 40.1% of volume over the last 20 sessions, down from 49.7% the 20 sessions before, the 24th percentile of its own 20-day averages since Oct 6, 2025.
Short interest
Official, twice monthly · settled Oct 15, 2026
- Shares short
- 13.2M
- prior 11.8M
- % of float
- 9.0%
- float 146.7M
- Days to cover
- 1.0
- avg vol 14.9M
- Change vs prior report
- +11.6%
| Report date | Shares short | $ value short | Change | % float | Days to cover | Price |
|---|---|---|---|---|---|---|
| Oct 15, 2026 | 13.2M | $17.3M | +11.6% | 9.0% | 1.0 | $1.31 |
| Sep 30, 2026 | 11.8M | $12.7M | -9.3% | 8.1% | 2.5 | $1.07 |
| Sep 15, 2026 | 13.0M | $9.4M | -9.7% | 8.9% | 10.3 | $0.72 |
| Aug 31, 2026 | 14.4M | $11.1M | +1.2% | 9.8% | 4.8 | $0.77 |
| Aug 14, 2026 | 14.3M | $10.6M | -7.4% | 9.7% | 4.7 | $0.74 |
| Jul 31, 2026 | 15.4M | $11.0M | +9.1% | 10.5% | 5.9 | $0.71 |
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 11)
- 29.2%
- 1.1M of 3.8M
- 20-day average
- 40.1%
- prior 49.7%
- Percentile vs own history
- 24th
- 233 periods since 2025
Loading prices…
Source: FINRA Reg SHO daily short sale volume · Latest Nov 11, 2026
Short squeeze score (model)
Price since settlement: -6.9%
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.
QSI'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 · QSI overview
| Date | Short | Total | Short % of volume |
|---|---|---|---|
| 2026-11-11 | 1,114,377 | 3,817,600 | 29.2% |
| 2026-11-10 | 1,090,325 | 2,936,203 | 37.1% |
| 2026-11-09 | 820,130 | 3,186,892 | 25.7% |
| 2026-11-06 | 1,838,609 | 5,366,226 | 34.3% |
| 2026-11-05 | 1,343,593 | 3,647,717 | 36.8% |
| 2026-11-04 | 1,849,508 | 3,671,747 | 50.4% |
| 2026-11-03 | 966,683 | 2,640,499 | 36.6% |
| 2026-11-02 | 1,816,578 | 4,168,234 | 43.6% |
| 2026-10-30 | 1,791,936 | 6,050,571 | 29.6% |
| 2026-10-29 | 1,698,751 | 5,141,669 | 33.0% |
Healthcare peers with similar quant ratings
QSI among 545 rated Healthcare stocks (Lician quant rating, Nov 13, 2026). How the rating works
- KNSA short interest5.00 · Strong Buy · stock
- QTTB short interest4.99 · Strong Buy · stock
- AVAH short interest4.98 · Strong Buy · stock
- CDNA short interest4.97 · Strong Buy · stock
- EWTX short interest4.97 · Strong Buy · stock
- SNY short interest4.96 · Strong Buy · stock
- REGN short interest4.95 · Strong Buy · stock
- BTSG short interest4.94 · Strong Buy
QSI short interest FAQ
What is QSI's short interest?
QuantumSi Inc (QSI) had 13.2M shares sold short and not yet covered in FINRA's Oct 15, 2026 settlement report, 9.0% of its 146.7M-share float.
How many days to cover does QSI have?
1.0 days: 13.2M shares short divided by an average daily volume of 14.9M for the Oct 15, 2026 period.
Is QSI short interest rising or falling?
QSI short interest rose (+11.6%) from 11.8M to 13.2M shares in the Oct 15, 2026 report.
Is QSI a short squeeze candidate?
Lician's squeeze watch scores QSI 18 out of 100 (low) from the Oct 15, 2026 report: short interest % of float 12/40, days to cover 2.5/25, change in short interest vs prior report 3.5/15, 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 QSI daily volume is sold short?
40.1% on average over the last 20 sessions to Nov 11, 2026 (FINRA Reg SHO daily short volume; the 24th percentile of its own 20-day averages). Short volume counts market makers' same-day short sales, so it is not short interest.
What was QSI's latest FINRA short volume?
On Nov 11, 2026, cached FINRA short volume for QuantumSi Inc (QSI) was 1,114,377 shares, 29.2% of 3,817,600 total volume.
How many QSI short-volume sessions are listed on this page?
This page lists 10 cached FINRA short-volume sessions for QuantumSi Inc (QSI), from Oct 29, 2026 through Nov 11, 2026.
How did QSI short volume percent change from the prior cached session?
Cached FINRA short volume for QuantumSi Inc (QSI) moved from 37.1% on Nov 10, 2026 to 29.2% on Nov 11, 2026, down 7.9 percentage points.
Not investment advice. Figures as filed or reported, not a live feed.