Bio-Rad Laboratories (BIO) short interest & short volume · 1.1M shares short
Bio-Rad Laboratories official short interest (FINRA, twice monthly) and daily short volume (FINRA Reg SHO), with history, % of float and days to cover.
What changed
BIO short interest fell 7.2% to 1.1M shares in the Oct 15, 2026 report (4.8 days to cover). Daily short volume averaged 67.1% of volume over the last 20 sessions, up from 63.4% the 20 sessions before, the 42nd percentile of its own 20-day averages since Sep 24, 2025.
Short interest
Official, twice monthly · settled Oct 15, 2026
- Shares short
- 1.1M
- prior 1.2M
- % of float
- —
- no float on file
- Days to cover
- 4.8
- avg vol 227K
- Change vs prior report
- -7.2%
| Report date | Shares short | $ value short | Change | % float | Days to cover | Price |
|---|---|---|---|---|---|---|
| Oct 15, 2026 | 1.1M | $400.4M | -7.2% | — | 4.8 | $364.82 |
| Sep 30, 2026 | 1.2M | $446.7M | +18.4% | — | 4.3 | $377.71 |
| Sep 15, 2026 | 999K | $377.5M | -11.7% | — | 3.8 | $378.00 |
| Aug 31, 2026 | 1.1M | $436.4M | -14.9% | — | 4.2 | $386.12 |
| Aug 14, 2026 | 1.3M | $473.0M | -6.0% | — | 4.8 | $356.26 |
| Jul 31, 2026 | 1.4M | $459.7M | -9.4% | — | 4.3 | $325.48 |
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 3)
- 67.0%
- 60K of 89K
- 20-day average
- 67.1%
- prior 63.4%
- Percentile vs own history
- 42nd
- 233 periods since 2025
Loading prices…
Source: FINRA Reg SHO daily short sale volume · Latest Nov 3, 2026
Short squeeze score (model)
Price since settlement: +2.8%
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.
BIO'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 · BIO overview
| Date | Short | Total | Short % of volume |
|---|---|---|---|
| 2026-11-03 | 59,871 | 89,346 | 67.0% |
| 2026-11-02 | 62,367 | 99,614 | 62.6% |
| 2026-10-30 | 46,596 | 69,560 | 67.0% |
| 2026-10-29 | 87,492 | 182,049 | 48.1% |
| 2026-10-28 | 54,761 | 103,969 | 52.7% |
| 2026-10-27 | 49,686 | 67,825 | 73.3% |
| 2026-10-26 | 42,435 | 60,327 | 70.3% |
| 2026-10-23 | 57,569 | 69,846 | 82.4% |
| 2026-10-22 | 65,009 | 81,802 | 79.5% |
| 2026-10-21 | 122,807 | 159,669 | 76.9% |
Technology peers with similar quant ratings
BIO is rated 2.49 of 5 among 462 rated Technology stocks (Lician quant rating, Nov 4, 2026). How the rating works
- BKTI short interest2.52 · Hold · stock
- EEFT short interest2.51 · Hold · stock
- LSAK short interest2.51 · Hold · stock
- ONTO short interest2.50 · Hold · stock
- WIX short interest2.48 · Sell
- GILT short interest2.47 · Sell · stock
- IMMR short interest2.47 · Sell · stock
- ATEN short interest2.45 · Sell · stock
BIO short interest FAQ
What is BIO's short interest?
Bio-Rad Laboratories (BIO) had 1.1M shares sold short and not yet covered in FINRA's Oct 15, 2026 settlement report.
How many days to cover does BIO have?
4.8 days: 1.1M shares short divided by an average daily volume of 227K for the Oct 15, 2026 period.
Is BIO short interest rising or falling?
BIO short interest fell (-7.2%) from 1.2M to 1.1M shares in the Oct 15, 2026 report.
Is BIO a short squeeze candidate?
Lician's squeeze watch scores BIO 14 out of 100 (low) from the Oct 15, 2026 report: days to cover 12.1/25, change in short interest vs prior report 0/15, price change since settlement date 2.2/20. It is a transparent model of how crowded the short side is, not a forecast that a squeeze will happen.
What share of BIO daily volume is sold short?
67.1% on average over the last 20 sessions to Nov 3, 2026 (FINRA Reg SHO daily short volume; the 42nd percentile of its own 20-day averages). Short volume counts market makers' same-day short sales, so it is not short interest.
What was BIO's latest FINRA short volume?
On Nov 3, 2026, cached FINRA short volume for Bio-Rad Laboratories (BIO) was 59,871 shares, 67.0% of 89,346 total volume.
How many BIO short-volume sessions are listed on this page?
This page lists 10 cached FINRA short-volume sessions for Bio-Rad Laboratories (BIO), from Oct 21, 2026 through Nov 3, 2026.
How did BIO short volume percent change from the prior cached session?
Cached FINRA short volume for Bio-Rad Laboratories (BIO) moved from 62.6% on Nov 2, 2026 to 67.0% on Nov 3, 2026, up 4.4 percentage points.
Not investment advice. Figures as filed or reported, not a live feed.