SIGA Technologies Inc (SIGA) short interest & short volume · 8.7% of float short
SIGA Technologies Inc official short interest (FINRA, twice monthly) and daily short volume (FINRA Reg SHO), with history, % of float and days to cover.
What changed
SIGA short interest fell 1.0% to 3.6M shares in the Oct 15, 2026 report (8.7% of float, 6.4 days to cover). Daily short volume averaged 40.5% of volume over the last 20 sessions, down from 46.8% the 20 sessions before, the 12th percentile of its own 20-day averages since Sep 23, 2025.
Short interest
Official, twice monthly · settled Oct 15, 2026
- Shares short
- 3.6M
- prior 3.6M
- % of float
- 8.7%
- float 41.1M
- Days to cover
- 6.4
- avg vol 561K
- Change vs prior report
- -1.0%
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)
- 36.4%
- 117K of 321K
- 20-day average
- 40.5%
- prior 46.8%
- Percentile vs own history
- 12th
- 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: -2.5%
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.
SIGA'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 · SIGA overview
| Date | Short | Total | Short % of volume |
|---|---|---|---|
| 2026-11-02 | 116,759 | 320,958 | 36.4% |
| 2026-10-30 | 85,746 | 232,857 | 36.8% |
| 2026-10-29 | 31,516 | 179,807 | 17.5% |
| 2026-10-28 | 93,918 | 284,506 | 33.0% |
| 2026-10-27 | 50,106 | 175,894 | 28.5% |
| 2026-10-26 | 70,317 | 147,857 | 47.6% |
| 2026-10-23 | 94,466 | 197,672 | 47.8% |
| 2026-10-22 | 38,938 | 72,799 | 53.5% |
| 2026-10-21 | 41,714 | 92,111 | 45.3% |
| 2026-10-20 | 27,790 | 62,191 | 44.7% |
Healthcare peers with similar quant ratings
SIGA is rated 1.84 of 5 among 532 rated Healthcare stocks (Lician quant rating, Nov 4, 2026). How the rating works
- TRVI short interest1.87 · Sell · stock
- QDEL short interest1.86 · Sell · stock
- CTMX short interest1.85 · Sell · stock
- PRME short interest1.85 · Sell · stock
- BCAX short interest1.83 · Sell · stock
- BDTX short interest1.82 · Sell · stock
- CUE short interest1.82 · Sell · stock
- VYGR short interest1.81 · Sell · stock
SIGA short interest FAQ
What is SIGA's short interest?
SIGA Technologies Inc (SIGA) had 3.6M shares sold short and not yet covered in FINRA's Oct 15, 2026 settlement report, 8.7% of its 41.1M-share float.
How many days to cover does SIGA have?
6.4 days: 3.6M shares short divided by an average daily volume of 561K for the Oct 15, 2026 period.
Is SIGA short interest rising or falling?
SIGA short interest fell (-1.0%) from 3.6M to 3.6M shares in the Oct 15, 2026 report.
Is SIGA a short squeeze candidate?
Lician's squeeze watch scores SIGA 27 out of 100 (low) from the Oct 15, 2026 report: short interest % of float 11.5/40, days to cover 15.9/25, 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 SIGA daily volume is sold short?
40.5% on average over the last 20 sessions to Nov 2, 2026 (FINRA Reg SHO daily short volume; the 12th percentile of its own 20-day averages). Short volume counts market makers' same-day short sales, so it is not short interest.
What was SIGA's latest FINRA short volume?
On Nov 2, 2026, cached FINRA short volume for SIGA Technologies Inc (SIGA) was 116,759 shares, 36.4% of 320,958 total volume.
How many SIGA short-volume sessions are listed on this page?
This page lists 10 cached FINRA short-volume sessions for SIGA Technologies Inc (SIGA), from Oct 20, 2026 through Nov 2, 2026.
How did SIGA short volume percent change from the prior cached session?
Cached FINRA short volume for SIGA Technologies Inc (SIGA) moved from 36.8% on Oct 30, 2026 to 36.4% on Nov 2, 2026, down 0.4 percentage points.
Not investment advice. Figures as filed or reported, not a live feed.