PDF Solutions Inc (PDFS) short interest & short volume · 3.3M shares short
PDF Solutions Inc official short interest (FINRA, twice monthly) and daily short volume (FINRA Reg SHO), with history, % of float and days to cover.
What changed
PDFS short interest fell 6.5% to 3.3M shares in the Oct 15, 2026 report (5.7 days to cover). Daily short volume averaged 70.6% of volume over the last 20 sessions, up from 68.3% the 20 sessions before, the 91st percentile of its own 20-day averages since Sep 23, 2025.
Short interest
Official, twice monthly · settled Oct 15, 2026
- Shares short
- 3.3M
- prior 3.5M
- % of float
- —
- no float on file
- Days to cover
- 5.7
- avg vol 586K
- Change vs prior report
- -6.5%
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)
- 49.9%
- 121K of 242K
- 20-day average
- 70.6%
- prior 68.3%
- Percentile vs own history
- 91st
- 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: +2.2%
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.
PDFS'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 · PDFS overview
| Date | Short | Total | Short % of volume |
|---|---|---|---|
| 2026-11-02 | 120,822 | 242,198 | 49.9% |
| 2026-10-30 | 286,499 | 394,607 | 72.6% |
| 2026-10-29 | 169,782 | 225,834 | 75.2% |
| 2026-10-28 | 110,008 | 177,107 | 62.1% |
| 2026-10-27 | 131,083 | 178,589 | 73.4% |
| 2026-10-26 | 108,754 | 151,763 | 71.7% |
| 2026-10-23 | 96,467 | 170,739 | 56.5% |
| 2026-10-22 | 171,857 | 273,165 | 62.9% |
| 2026-10-21 | 172,985 | 210,456 | 82.2% |
| 2026-10-20 | 148,630 | 194,332 | 76.5% |
Technology peers with similar quant ratings
PDFS is rated 3.08 of 5 among 462 rated Technology stocks (Lician quant rating, Nov 4, 2026). How the rating works
- FOUR short interest3.11 · Hold
- UBER short interest3.10 · Hold · stock
- UMC short interest3.10 · Hold
- HPQ short interest3.09 · Hold · stock
- BMI short interest3.07 · Hold · stock
- CNXN short interest3.06 · Hold · stock
- DIOD short interest3.05 · Hold · stock
- NLST short interest3.04 · Hold · stock
PDFS short interest FAQ
What is PDFS's short interest?
PDF Solutions Inc (PDFS) had 3.3M shares sold short and not yet covered in FINRA's Oct 15, 2026 settlement report.
How many days to cover does PDFS have?
5.7 days: 3.3M shares short divided by an average daily volume of 586K for the Oct 15, 2026 period.
Is PDFS short interest rising or falling?
PDFS short interest fell (-6.5%) from 3.5M to 3.3M shares in the Oct 15, 2026 report.
Is PDFS a short squeeze candidate?
Lician's squeeze watch scores PDFS 16 out of 100 (low) from the Oct 15, 2026 report: days to cover 14.1/25, change in short interest vs prior report 0/15, price change since settlement date 1.8/20. It is a transparent model of how crowded the short side is, not a forecast that a squeeze will happen.
What share of PDFS daily volume is sold short?
70.6% on average over the last 20 sessions to Nov 2, 2026 (FINRA Reg SHO daily short volume; the 91st percentile of its own 20-day averages). Short volume counts market makers' same-day short sales, so it is not short interest.
What was PDFS's latest FINRA short volume?
On Nov 2, 2026, cached FINRA short volume for PDF Solutions Inc (PDFS) was 120,822 shares, 49.9% of 242,198 total volume.
How many PDFS short-volume sessions are listed on this page?
This page lists 10 cached FINRA short-volume sessions for PDF Solutions Inc (PDFS), from Oct 20, 2026 through Nov 2, 2026.
How did PDFS short volume percent change from the prior cached session?
Cached FINRA short volume for PDF Solutions Inc (PDFS) moved from 72.6% on Oct 30, 2026 to 49.9% on Nov 2, 2026, down 22.7 percentage points.
Not investment advice. Figures as filed or reported, not a live feed.