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TNDM · Tandem Diabetes Care Inc · Short Interest

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$20.07 +2.56 (+14.62%) At close · Nov 13 Play latest call Q3 2026 earnings call transcript
S&P 600 member Russell 2000 member Rebalance outlook locked
Market Cap
$1.40B
Shares
69.79M
Volume · Nov 13 4.4M Avg daily vol (3M) 2.21M

Shares sold short and not yet covered, reported twice monthly. Days to cover is the reported short position divided by average daily volume.

Pull short interest history through the short interest API or MCP →

TNDM Latest Reported Short Interest

FINRA reported 16,171,009 TNDM shares sold short as of the October 30, 2026 settlement date, an increase of 1,084,449 shares. Days to cover was 7.63 based on FINRA's reported average daily volume.

Official FINRA short-interest data · share counts are restated for subsequent splits of this listing

TNDM Short Interest Forecast

Equibles' model estimates 15,997,413 shares sold short for the November 13, 2026 settlement, -1.1% versus the latest reported position, with a likely range of 14,165,018 to 17,699,658 shares. This model prediction uses FINRA data through November 13, 2026; FINRA's official release is expected November 24, 2026.

Model estimate

Expected Nov 13 short interest

as of Nov 13 Medium confidence 66% chance it falls
15,997,413 -1.1% vs reported
Likely range 14,165,018 to 17,699,658 The latest estimate appears in the chart below. Official release expected Nov 24. Methodology
Short Squeeze Score
96/100
Short interest 23.2% of shares — P99 Days to cover 7.6 — P82 Price vs VWAP +10.4% — P90 Short-volume trend +7.4% — P79 Short interest change +7.2% — P75 Worst FTD 0.03% of shares — P68 Price spike +10

Positioning score 85.6 + catalyst boost 10 (total capped at 100). This is a screening index, not a probability of a squeeze.

Method and coverage limits

Factor percentiles compare eligible primary operating-company stocks reporting short interest at the latest settlement date (2026-10-30). The weighted mean uses short interest 30%, days to cover 20%, price vs VWAP 15%, short-volume trend 15%, short-interest change 10%, and fails-to-deliver 10%. Missing factors redistribute their weight; incomplete coverage is not evidence of low risk. Price, volume, and earnings boosts add 10 each, capped at 20.

Shares outstanding are not free float. Borrow fees, utilization, lendable supply, recalls, and dealer inventory are not measured. Short-sale volume does not measure the change in open shorts; fails to deliver are not a borrow-cost measurement; price vs VWAP does not establish short sellers' entry prices. Earnings can move prices in either direction.

The weights are judgment-based, not calibrated to future squeeze outcomes. The separate options assessment below does not change this universe ranking.

Options positioning & squeeze sensitivity

Nearest expiration after today within 30 calendar days; same-day expirations and later maturities are excluded.

Open interest is incomplete, stale, or dated inconsistently; positioning totals are unavailable.

Open interest has both a buyer and a seller; it does not reveal dealer hedge direction. Gross gamma sums both calls and puts without netting and uses a local 1% price-change approximation. It measures sensitivity, not predicted buying or a squeeze probability.

Assessment prepared 2026-11-15 02:22 UTC. Options model values may come from a cached snapshot; their original computation time is not supplied. Open interest has its own effective date.

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    • Short Interest History

    Settlement Date Current Position Previous Position Change Days to Cover
    2026-11-30 Scheduled
    FINRA publishes Dec 9
    		 — — — —
    2026-11-13 Scheduled
    FINRA publishes Nov 24
    		 — — — —
    2026-10-30 16,171,009 15,086,560 +1,084,449 7.63
    2026-10-15 15,086,560 13,369,091 +1,717,469 6.86
    2026-09-30 13,369,091 12,474,385 +894,706 5.25
    2026-09-15 12,474,385 11,753,819 +720,566 7.89
    2026-08-31 11,753,819 10,585,732 +1,168,087 8.17
    2026-08-14 10,585,732 11,242,544 -656,812 3.89
    2026-07-31 11,242,544 13,115,208 -1,872,664 6.58
    2026-07-15 13,115,208 12,731,073 +384,135 8.73
    2026-06-30 12,731,073 10,854,250 +1,876,823 5.62
    2026-06-15 10,854,250 11,788,786 -934,536 4.07
    2026-05-29 11,788,786 10,801,432 +987,354 4.15
    2026-05-15 10,801,432 9,723,853 +1,077,579 3.35
    2026-04-30 9,723,853 9,643,357 +80,496 6.17
    2026-04-15 9,643,357 10,531,890 -888,533 6.47
    2026-03-31 10,531,890 10,547,769 -15,879 5.05
    2026-03-13 10,547,769 9,763,559 +784,210 6.00
    2026-02-27 9,763,559 8,960,466 +803,093 2.29
    2026-02-13 8,960,466 8,934,137 +26,329 9.17
    2026-01-30 8,934,137 9,004,559 -70,422 6.56
    2026-01-15 9,004,559 8,544,303 +460,256 6.78
    2025-12-31 8,544,303 8,176,917 +367,386 6.70
    2025-12-15 8,176,917 8,753,315 -576,398 4.61
    2025-11-28 8,753,315 8,787,092 -33,777 3.12

    Full FINRA short interest reporting calendar

    Showing 1–23 of 23 settlements
    Key facts CIK 1438133 CUSIP 875372203 13F (30d) 215 filings 190 filers Visit website Investor relations