Ribbon Communications Inc (RBBN) short interest & short volume · 5.2M shares short
Ribbon Communications Inc official short interest (FINRA, twice monthly) and daily short volume (FINRA Reg SHO), with history, % of float and days to cover.
What changed
RBBN short interest rose 3.8% to 5.2M shares in the Oct 15, 2026 report (3.4 days to cover). Daily short volume averaged 45.4% of volume over the last 20 sessions, down from 54.1% the 20 sessions before, the 5th percentile of its own 20-day averages since Sep 23, 2025.
Short interest
Official, twice monthly · settled Oct 15, 2026
- Shares short
- 5.2M
- prior 5.0M
- % of float
- —
- no float on file
- Days to cover
- 3.4
- avg vol 1.5M
- Change vs prior report
- +3.8%
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)
- 33.4%
- 258K of 773K
- 20-day average
- 45.4%
- prior 54.1%
- Percentile vs own history
- 5th
- 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: +11.3%
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.
RBBN'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 · RBBN overview
| Date | Short | Total | Short % of volume |
|---|---|---|---|
| 2026-11-02 | 258,418 | 772,861 | 33.4% |
| 2026-10-30 | 100,219 | 181,714 | 55.1% |
| 2026-10-29 | 147,137 | 383,230 | 38.4% |
| 2026-10-28 | 481,246 | 1,128,582 | 42.6% |
| 2026-10-27 | 319,589 | 794,968 | 40.2% |
| 2026-10-26 | 177,341 | 653,699 | 27.1% |
| 2026-10-23 | 183,441 | 344,449 | 53.3% |
| 2026-10-22 | 151,304 | 403,344 | 37.5% |
| 2026-10-21 | 154,020 | 354,438 | 43.5% |
| 2026-10-20 | 255,306 | 604,724 | 42.2% |
Technology peers with similar quant ratings
RBBN is rated 1.98 of 5 among 462 rated Technology stocks (Lician quant rating, Nov 4, 2026). How the rating works
- TTMI short interest2.02 · Sell · stock
- NABL short interest2.01 · Sell · stock
- TRMB short interest2.00 · Sell · stock
- LAW short interest1.99 · Sell · stock
- VRRM short interest1.98 · Sell · stock
- IMXI short interest1.97 · Sell · stock
- NOW short interest1.96 · Sell · stock
- GFS short interest1.95 · Sell
RBBN short interest FAQ
What is RBBN's short interest?
Ribbon Communications Inc (RBBN) had 5.2M shares sold short and not yet covered in FINRA's Oct 15, 2026 settlement report.
How many days to cover does RBBN have?
3.4 days: 5.2M shares short divided by an average daily volume of 1.5M for the Oct 15, 2026 period.
Is RBBN short interest rising or falling?
RBBN short interest rose (+3.8%) from 5.0M to 5.2M shares in the Oct 15, 2026 report.
Is RBBN a short squeeze candidate?
Lician's squeeze watch scores RBBN 19 out of 100 (low) from the Oct 15, 2026 report: days to cover 8.5/25, change in short interest vs prior report 1.1/15, price change since settlement date 9/20. It is a transparent model of how crowded the short side is, not a forecast that a squeeze will happen.
What share of RBBN daily volume is sold short?
45.4% on average over the last 20 sessions to Nov 2, 2026 (FINRA Reg SHO daily short volume; the 5th percentile of its own 20-day averages). Short volume counts market makers' same-day short sales, so it is not short interest.
What was RBBN's latest FINRA short volume?
On Nov 2, 2026, cached FINRA short volume for Ribbon Communications Inc (RBBN) was 258,418 shares, 33.4% of 772,861 total volume.
How many RBBN short-volume sessions are listed on this page?
This page lists 10 cached FINRA short-volume sessions for Ribbon Communications Inc (RBBN), from Oct 20, 2026 through Nov 2, 2026.
How did RBBN short volume percent change from the prior cached session?
Cached FINRA short volume for Ribbon Communications Inc (RBBN) moved from 55.1% on Oct 30, 2026 to 33.4% on Nov 2, 2026, down 21.7 percentage points.
Not investment advice. Figures as filed or reported, not a live feed.