Pulmatrix Inc (PULM) short interest & short volume · 43K shares short
Pulmatrix Inc official short interest (FINRA, twice monthly) and daily short volume (FINRA Reg SHO), with history, % of float and days to cover.
What changed
PULM short interest fell 11.8% to 43K shares in the Oct 15, 2026 report (2.9 days to cover). Daily short volume averaged 35.1% of volume over the last 20 sessions, down from 36.5% the 20 sessions before, the 63rd percentile of its own 20-day averages since Sep 22, 2025.
Short interest
Official, twice monthly · settled Oct 15, 2026
- Shares short
- 43K
- prior 49K
- % of float
- —
- no float on file
- Days to cover
- 2.9
- avg vol 15K
- Change vs prior report
- -11.8%
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.
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)
- 18.6%
- 585 of 3K
- 20-day average
- 35.1%
- prior 36.5%
- Percentile vs own history
- 63rd
- 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: -5.7%
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.
PULM'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 · PULM overview
| Date | Short | Total | Short % of volume |
|---|---|---|---|
| 2026-11-02 | 585 | 3,146 | 18.6% |
| 2026-10-30 | 3,322 | 5,927 | 56.0% |
| 2026-10-29 | 604 | 1,700 | 35.5% |
| 2026-10-28 | 37 | 4,452 | 0.8% |
| 2026-10-27 | 8,347 | 31,889 | 26.2% |
| 2026-10-26 | 2,745 | 3,487 | 78.7% |
| 2026-10-23 | 1,930 | 5,625 | 34.3% |
| 2026-10-22 | 5,242 | 10,936 | 47.9% |
| 2026-10-21 | 22,297 | 48,691 | 45.8% |
| 2026-10-20 | 630 | 5,350 | 11.8% |
Healthcare peers with similar quant ratings
PULM 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
PULM short interest FAQ
What is PULM's short interest?
Pulmatrix Inc (PULM) had 43K shares sold short and not yet covered in FINRA's Oct 15, 2026 settlement report.
How many days to cover does PULM have?
2.9 days: 43K shares short divided by an average daily volume of 15K for the Oct 15, 2026 period.
Is PULM short interest rising or falling?
PULM short interest fell (-11.8%) from 49K to 43K shares in the Oct 15, 2026 report.
Is PULM a short squeeze candidate?
Lician's squeeze watch scores PULM 7 out of 100 (low) from the Oct 15, 2026 report: days to cover 7.2/25, change in short interest vs prior report 0/15, 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 PULM daily volume is sold short?
35.1% on average over the last 20 sessions to Nov 2, 2026 (FINRA Reg SHO daily short volume; the 63rd percentile of its own 20-day averages). Short volume counts market makers' same-day short sales, so it is not short interest.
What was PULM's latest FINRA short volume?
On Nov 2, 2026, cached FINRA short volume for Pulmatrix Inc (PULM) was 585 shares, 18.6% of 3,146 total volume.
How many PULM short-volume sessions are listed on this page?
This page lists 10 cached FINRA short-volume sessions for Pulmatrix Inc (PULM), from Oct 20, 2026 through Nov 2, 2026.
How did PULM short volume percent change from the prior cached session?
Cached FINRA short volume for Pulmatrix Inc (PULM) moved from 56.0% on Oct 30, 2026 to 18.6% on Nov 2, 2026, down 37.4 percentage points.
Not investment advice. Figures as filed or reported, not a live feed.