TNDM
Tandem Diabetes Care, Inc.
stockNASDAQ
At CloseNov 13, 2026 3:59:56 PM EST
20.06USD+14.563%(+2.55)4,396,784
Pre-marketNov 13, 2026 9:27:30 AM EST
19.65USD+12.222%(+2.14)
After-hoursNov 13, 2026 4:38:30 PM EST
20.09USD+0.150%(+0.03)
As of 2026-10-30, there were 16,171,009 shares short with a short interest of 25.36%.
TNDM Short Interest - Official
TNDM Short Position Change - Official
TNDM Short Interest - Official
| Settlement Date1 | Short Interest % | Short Position | Days to Cover2 | Short Position Change | Short Position Change % | Shares Out | Shares Float |
|---|---|---|---|---|---|---|---|
| 2026-10-30 | 25.36 | 16,171,009 | 7.63 | +1,084,449 | +7.19 | 69,578,707 | 63,757,057 |
| 2026-10-15 | 23.66 | 15,086,560 | 6.86 | +1,717,469 | +12.85 | 69,578,707 | 63,759,144 |
| 2026-09-30 | 21.25 | 13,369,091 | 5.25 | +894,706 | +7.17 | 69,578,707 | 62,919,983 |
| 2026-09-15 | 19.83 | 12,474,385 | 7.89 | +720,566 | +6.13 | 69,578,707 | 62,919,983 |
| 2026-08-31 | 18.68 | 11,753,819 | 8.17 | +1,168,087 | +11.03 | 69,578,707 | 62,919,983 |
| 2026-08-14 | 16.82 | 10,585,732 | 3.89 | -656,812 | -5.84 | 69,578,707 | 62,919,983 |
| 2026-07-31 | 17.87 | 11,242,544 | 6.58 | -1,872,664 | -14.28 | 68,529,089 | 62,919,983 |
| 2026-07-15 | 20.84 | 13,115,208 | 8.73 | +384,135 | +3.02 | 68,529,089 | 62,922,039 |
| 2026-06-30 | 20.23 | 12,731,073 | 5.62 | +1,876,823 | +17.29 | 68,529,089 | 62,922,039 |
| 2026-06-15 | 17.25 | 10,854,250 | 4.07 | +52,818 | +0.49 | 68,529,089 | 62,922,039 |
| 2026-05-15 | 17.20 | 10,801,432 | 3.35 | +1,077,579 | +11.08 | 68,529,089 | 62,784,981 |
| 2026-04-30 | 15.67 | 9,723,853 | 6.17 | +80,496 | +0.83 | 68,504,233 | 62,057,465 |
| 2026-04-15 | 15.54 | 9,643,357 | 6.47 | -888,533 | -8.44 | 68,504,233 | 62,057,465 |
| 2026-03-31 | 16.97 | 10,531,890 | 5.05 | -15,879 | -0.15 | 68,325,927 | 62,057,465 |
| 2026-03-13 | 17.00 | 10,547,769 | 6.00 | +784,210 | +8.03 | 68,325,927 | 62,057,465 |
| 2026-02-27 | 15.73 | 9,763,559 | 2.29 | +803,093 | +8.96 | 67,802,359 | 62,057,465 |
| 2026-02-13 | 14.44 | 8,960,466 | 9.17 | +26,329 | +0.29 | 67,802,359 | 62,057,465 |
| 2026-01-30 | 14.40 | 8,934,137 | 6.56 | -70,422 | -0.78 | 67,802,359 | 62,057,465 |
| 2026-01-15 | 14.51 | 9,004,559 | 6.78 | +460,256 | +5.39 | 67,802,359 | 62,057,465 |
| 2025-12-31 | 13.77 | 8,544,303 | 6.70 | +367,386 | +4.49 | 67,802,359 | 62,057,465 |
| 2025-12-15 | 13.18 | 8,176,917 | 4.61 | -576,398 | -6.58 | 67,802,359 | 62,041,193 |
| 2025-11-28 | 14.11 | 8,753,315 | 3.12 | -33,777 | -0.38 | 67,802,359 | 62,041,193 |
Historical data is split-adjusted.
1 Data from Finra. Finra publishes an updated file every two weeks.
2 Days to Cover (DTC) is also called Short Ratio. This is the Short Position / Average Daily Trading Volume.