Tandem Diabetes Care Inc (TNDM) short interest & short volume · 15.1M shares short
Tandem Diabetes Care Inc official short interest (FINRA, twice monthly) and daily short volume (FINRA Reg SHO), with history, % of float and days to cover.
What changed
TNDM short interest rose 12.8% to 15.1M shares in the Oct 15, 2026 report (6.9 days to cover). Daily short volume averaged 65.5% of volume over the last 20 sessions, up from 58.3% the 20 sessions before, the 98th percentile of its own 20-day averages since Sep 23, 2025.
Short interest
Official, twice monthly · settled Oct 15, 2026
- Shares short
- 15.1M
- prior 13.4M
- % of float
- —
- no float on file
- Days to cover
- 6.9
- avg vol 2.2M
- Change vs prior report
- +12.8%
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)
- 49.8%
- 586K of 1.2M
- 20-day average
- 65.5%
- prior 58.3%
- Percentile vs own history
- 98th
- 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: +6.8%
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.
TNDM'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 · TNDM overview
| Date | Short | Total | Short % of volume |
|---|---|---|---|
| 2026-11-02 | 585,932 | 1,175,991 | 49.8% |
| 2026-10-30 | 300,690 | 583,003 | 51.6% |
| 2026-10-29 | 559,015 | 1,092,089 | 51.2% |
| 2026-10-28 | 664,651 | 828,371 | 80.2% |
| 2026-10-27 | 514,373 | 705,970 | 72.9% |
| 2026-10-26 | 1,036,113 | 1,596,723 | 64.9% |
| 2026-10-23 | 794,786 | 885,098 | 89.8% |
| 2026-10-22 | 752,761 | 992,324 | 75.9% |
| 2026-10-21 | 470,980 | 565,498 | 83.3% |
| 2026-10-20 | 251,401 | 482,302 | 52.1% |
Healthcare peers with similar quant ratings
TNDM is rated 3.17 of 5 among 532 rated Healthcare stocks (Lician quant rating, Nov 4, 2026). How the rating works
- PRTA short interest3.20 · Hold · stock
- NEOG short interest3.19 · Hold · stock
- BSX short interest3.18 · Hold · stock
- XNCR short interest3.18 · Hold · stock
- JANX short interest3.16 · Hold · stock
- ABT short interest3.15 · Hold · stock
- ZTS short interest3.15 · Hold · stock
- SDGR short interest3.14 · Hold · stock
TNDM short interest FAQ
What is TNDM's short interest?
Tandem Diabetes Care Inc (TNDM) had 15.1M shares sold short and not yet covered in FINRA's Oct 15, 2026 settlement report.
How many days to cover does TNDM have?
6.9 days: 15.1M shares short divided by an average daily volume of 2.2M for the Oct 15, 2026 period.
Is TNDM short interest rising or falling?
TNDM short interest rose (+12.8%) from 13.4M to 15.1M shares in the Oct 15, 2026 report.
Is TNDM a short squeeze candidate?
Lician's squeeze watch scores TNDM 27 out of 100 (low) from the Oct 15, 2026 report: days to cover 17.2/25, change in short interest vs prior report 3.9/15, price change since settlement date 5.4/20. It is a transparent model of how crowded the short side is, not a forecast that a squeeze will happen.
What share of TNDM daily volume is sold short?
65.5% on average over the last 20 sessions to Nov 2, 2026 (FINRA Reg SHO daily short volume; the 98th percentile of its own 20-day averages). Short volume counts market makers' same-day short sales, so it is not short interest.
What was TNDM's latest FINRA short volume?
On Nov 2, 2026, cached FINRA short volume for Tandem Diabetes Care Inc (TNDM) was 585,932 shares, 49.8% of 1,175,991 total volume.
How many TNDM short-volume sessions are listed on this page?
This page lists 10 cached FINRA short-volume sessions for Tandem Diabetes Care Inc (TNDM), from Oct 20, 2026 through Nov 2, 2026.
How did TNDM short volume percent change from the prior cached session?
Cached FINRA short volume for Tandem Diabetes Care Inc (TNDM) moved from 51.6% on Oct 30, 2026 to 49.8% on Nov 2, 2026, down 1.8 percentage points.
Not investment advice. Figures as filed or reported, not a live feed.