PTGX
Protagonist Therapeutics, Inc
stockNASDAQ
At CloseOct 2, 2026 3:59:58 PM EDT
139.90USD+0.510%(+0.71)760,304
After-hoursOct 2, 2026 4:26:30 PM EDT
141.00USD+0.786%(+1.10)
As of 2026-09-15, there were 8,140,194 shares short with a short interest of 15.51%.
PTGX Short Interest - Official
Short Interest
PTGX Short Position Change - Official
Short Position Change
PTGX Short Interest - Official
| Settlement Date1 | Short Interest % | Short Position | Days to Cover2 | Short Position Change | Short Position Change % | Shares Out | Shares Float |
|---|---|---|---|---|---|---|---|
| 2026-09-15 | 15.51 | 8,140,194 | 15.13 | +427,651 | +5.54 | 64,708,285 | 52,492,872 |
| 2026-08-31 | 14.69 | 7,712,543 | 15.34 | -79,252 | -1.02 | 64,708,285 | 52,492,872 |
| 2026-08-14 | 14.84 | 7,791,795 | 16.42 | +248,686 | +3.30 | 64,708,285 | 52,492,872 |
| 2026-07-31 | 14.37 | 7,543,109 | 14.21 | -749,547 | -9.04 | 64,311,373 | 52,492,872 |
| 2026-07-15 | 15.80 | 8,292,656 | 9.53 | +601,309 | +7.82 | 64,311,373 | 52,492,872 |
| 2026-06-30 | 14.65 | 7,691,347 | 7.22 | -37,069 | -0.48 | 64,311,373 | 52,492,872 |
| 2026-06-15 | 14.72 | 7,728,416 | 11.59 | +434,597 | +5.96 | 64,311,373 | 52,492,872 |
| 2026-05-15 | 13.84 | 7,293,819 | 12.76 | -247,177 | -3.28 | 64,311,373 | 52,684,520 |
| 2026-04-30 | 12.76 | 7,540,996 | 11.88 | -856,282 | -10.20 | 64,305,185 | 59,093,340 |
| 2026-04-15 | 14.21 | 8,397,278 | 11.61 | -229,602 | -2.66 | 63,808,716 | 59,093,340 |
| 2026-03-31 | 14.60 | 8,626,880 | 7.64 | +565,889 | +7.02 | 63,808,716 | 59,093,340 |
| 2026-03-13 | 13.64 | 8,060,991 | 10.88 | -132,007 | -1.61 | 63,808,716 | 59,093,340 |
| 2026-02-27 | 13.86 | 8,192,998 | 16.48 | -250,734 | -2.97 | 62,515,666 | 59,093,340 |
| 2026-02-13 | 14.29 | 8,443,732 | 13.31 | +311,103 | +3.83 | 62,515,666 | 59,093,340 |
| 2026-01-30 | 13.76 | 8,132,629 | 10.56 | -165,146 | -1.99 | 62,515,666 | 59,093,340 |
| 2026-01-15 | 14.04 | 8,297,775 | 8.75 | +1,005,741 | +13.79 | 62,515,666 | 59,093,340 |
| 2025-12-31 | 12.34 | 7,292,034 | 9.51 | +753,009 | +11.52 | 62,515,666 | 59,093,340 |
| 2025-12-15 | 11.07 | 6,539,025 | 6.01 | +656,008 | +11.15 | 62,515,666 | 59,093,340 |
| 2025-11-28 | 9.96 | 5,883,017 | 7.07 | +300,691 | +5.39 | 62,515,666 | 59,076,586 |
| 2025-11-14 | 9.45 | 5,582,326 | 5.85 | +116,597 | +2.13 | 62,515,666 | 59,073,335 |
| 2025-10-31 | 9.30 | 5,465,729 | 5.60 | -846,299 | -13.41 | 62,211,318 | 58,785,759 |
| 2025-10-15 | 10.75 | 6,312,028 | 3.26 | -329,754 | -4.96 | 62,211,318 | 58,739,660 |
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.