United Microelectronics (UMC) short interest & short volume · 0.3% of float short
United Microelectronics official short interest (FINRA, twice monthly) and daily short volume (FINRA Reg SHO), with history, % of float and days to cover.
What changed
UMC short interest rose 8.6% to 30.2M shares in the Oct 15, 2026 report (0.3% of float, 2.5 days to cover). Daily short volume averaged 50.5% of volume over the last 20 sessions, down from 62.4% the 20 sessions before, the 11th percentile of its own 20-day averages since Sep 23, 2025.
Short interest
Official, twice monthly · settled Oct 15, 2026
- Shares short
- 30.2M
- prior 27.8M
- % of float
- 0.3%
- float 11.68B
- Days to cover
- 2.5
- avg vol 12.1M
- Change vs prior report
- +8.6%
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)
- 51.0%
- 1.2M of 2.4M
- 20-day average
- 50.5%
- prior 62.4%
- Percentile vs own history
- 11th
- 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: -21.6%
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.
UMC'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 · UMC overview
| Date | Short | Total | Short % of volume |
|---|---|---|---|
| 2026-11-02 | 1,229,496 | 2,408,583 | 51.0% |
| 2026-10-30 | 3,072,695 | 4,698,282 | 65.4% |
| 2026-10-29 | 2,265,182 | 3,471,192 | 65.3% |
| 2026-10-28 | 2,803,508 | 4,409,542 | 63.6% |
| 2026-10-27 | 1,456,018 | 2,645,060 | 55.0% |
| 2026-10-26 | 632,858 | 1,547,433 | 40.9% |
| 2026-10-23 | 726,897 | 2,229,778 | 32.6% |
| 2026-10-22 | 1,690,081 | 3,133,538 | 53.9% |
| 2026-10-21 | 740,891 | 1,682,260 | 44.0% |
| 2026-10-20 | 921,903 | 2,089,558 | 44.1% |
Technology peers with similar quant ratings
UMC is rated 3.10 of 5 among 462 rated Technology stocks (Lician quant rating, Nov 4, 2026). How the rating works
- SONO short interest3.13 · Hold · stock
- DAKT short interest3.12 · Hold · stock
- FOUR short interest3.11 · Hold
- UBER short interest3.10 · Hold · stock
- HPQ short interest3.09 · Hold · stock
- PDFS short interest3.08 · Hold · stock
- BMI short interest3.07 · Hold · stock
- CNXN short interest3.06 · Hold · stock
UMC short interest FAQ
What is UMC's short interest?
United Microelectronics (UMC) had 30.2M shares sold short and not yet covered in FINRA's Oct 15, 2026 settlement report, 0.3% of its 11.68B-share float.
How many days to cover does UMC have?
2.5 days: 30.2M shares short divided by an average daily volume of 12.1M for the Oct 15, 2026 period.
Is UMC short interest rising or falling?
UMC short interest rose (+8.6%) from 27.8M to 30.2M shares in the Oct 15, 2026 report.
Is UMC a short squeeze candidate?
Lician's squeeze watch scores UMC 9 out of 100 (low) from the Oct 15, 2026 report: short interest % of float 0.3/40, days to cover 6.3/25, change in short interest vs prior report 2.6/15, 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 UMC daily volume is sold short?
50.5% on average over the last 20 sessions to Nov 2, 2026 (FINRA Reg SHO daily short volume; the 11th percentile of its own 20-day averages). Short volume counts market makers' same-day short sales, so it is not short interest.
What was UMC's latest FINRA short volume?
On Nov 2, 2026, cached FINRA short volume for United Microelectronics (UMC) was 1,229,496 shares, 51.0% of 2,408,583 total volume.
How many UMC short-volume sessions are listed on this page?
This page lists 10 cached FINRA short-volume sessions for United Microelectronics (UMC), from Oct 20, 2026 through Nov 2, 2026.
How did UMC short volume percent change from the prior cached session?
Cached FINRA short volume for United Microelectronics (UMC) moved from 65.4% on Oct 30, 2026 to 51.0% on Nov 2, 2026, down 14.4 percentage points.
Not investment advice. Figures as filed or reported, not a live feed.