PTCT
PTC Therapeutics, Inc.
stockNASDAQ
At CloseOct 30, 2026 2:26:32 PM EDT
61.60USD-4.437%(-2.86)2,357,646
Pre-marketOct 30, 2026 10:29:59 AM EDT
63.13USD-2.063%(-1.33)
As of 2026-10-15, there were 8,303,282 shares short with a short interest of 11.27%.
PTCT Short Interest - Official
PTCT Short Position Change - Official
PTCT Short Interest - Official
| Settlement Date1 | Short Interest % | Short Position | Days to Cover2 | Short Position Change | Short Position Change % | Shares Out | Shares Float |
|---|---|---|---|---|---|---|---|
| 2026-10-15 | 11.27 | 8,303,282 | 7.59 | -865,051 | -9.44 | 83,460,802 | 73,689,211 |
| 2026-09-30 | 12.45 | 9,168,333 | 6.14 | -570,586 | -5.86 | 83,460,802 | 73,657,496 |
| 2026-09-15 | 13.22 | 9,738,919 | 11.03 | -89,235 | -0.91 | 83,460,802 | 73,657,496 |
| 2026-08-31 | 13.34 | 9,828,154 | 12.13 | -392,892 | -3.84 | 83,460,802 | 73,657,496 |
| 2026-08-14 | 13.88 | 10,221,046 | 10.82 | -345,203 | -3.27 | 83,460,802 | 73,657,496 |
| 2026-07-31 | 14.38 | 10,566,249 | 7.52 | +732,269 | +7.45 | 83,460,802 | 73,500,499 |
| 2026-07-15 | 13.44 | 9,833,980 | 4.75 | -7,481,052 | -43.21 | 82,949,338 | 73,173,759 |
| 2026-06-30 | 23.66 | 17,315,032 | 5.36 | +5,531,246 | +46.94 | 82,949,338 | 73,174,588 |
| 2026-06-15 | 16.10 | 11,783,786 | 7.82 | +1,543,002 | +15.07 | 82,949,338 | 73,170,441 |
| 2026-05-15 | 14.00 | 10,240,784 | 5.99 | +484,484 | +4.97 | 82,949,338 | 73,161,316 |
| 2026-04-30 | 13.82 | 9,756,300 | 7.44 | +1,208,438 | +14.14 | 82,911,783 | 70,574,223 |
| 2026-04-15 | 12.11 | 8,547,862 | 10.61 | -904,219 | -9.57 | 82,774,730 | 70,574,223 |
| 2026-03-31 | 13.39 | 9,452,081 | 8.41 | +604,516 | +6.83 | 82,774,730 | 70,574,223 |
| 2026-03-13 | 12.54 | 8,847,565 | 6.96 | -769,028 | -8.00 | 82,774,730 | 70,574,223 |
| 2026-02-27 | 13.63 | 9,616,593 | 8.13 | +24,640 | +0.26 | 80,288,305 | 70,574,223 |
| 2026-02-13 | 13.59 | 9,591,953 | 8.99 | -489,616 | -4.86 | 80,288,305 | 70,574,223 |
| 2026-01-30 | 14.29 | 10,081,569 | 9.35 | -208,850 | -2.03 | 80,288,305 | 70,574,223 |
| 2026-01-15 | 14.58 | 10,290,419 | 6.24 | -419,266 | -3.91 | 80,288,305 | 70,574,223 |
| 2025-12-31 | 15.18 | 10,709,685 | 10.03 | -733,247 | -6.41 | 80,288,305 | 70,574,223 |
| 2025-12-15 | 16.21 | 11,442,932 | 7.54 | -1,416,362 | -11.01 | 80,288,305 | 70,598,309 |
| 2025-11-28 | 18.21 | 12,859,294 | 4.10 | +3,440,379 | +36.53 | 80,288,305 | 70,603,127 |
| 2025-11-14 | 14.30 | 9,418,915 | 6.34 | +1,081,851 | +12.98 | 80,288,305 | 65,868,525 |
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.