Protagonist Therapeutics, Inc. (PTGX)
NASDAQ: PTGX · Real-Time Price · USD
92.08
+3.69 (4.17%)
At close: Feb 27, 2026, 4:00 PM EST
92.09
+0.01 (0.01%)
After-hours: Feb 27, 2026, 5:48 PM EST
Protagonist Therapeutics Stock Price History
Historical Data
| Date | Open | High | Low | Close | Adj. Close | Change | Volume |
|---|---|---|---|---|---|---|---|
| Feb 27, 2026 | 88.18 | 92.23 | 87.15 | 92.08 | 92.08 | 4.17% | 930,704 |
| Feb 26, 2026 | 87.50 | 88.83 | 85.60 | 88.39 | 88.39 | 1.48% | 705,943 |
| Feb 25, 2026 | 87.50 | 88.46 | 86.26 | 87.10 | 87.10 | -0.33% | 285,220 |
| Feb 24, 2026 | 86.72 | 89.59 | 86.00 | 87.39 | 87.39 | 0.92% | 668,518 |
| Feb 23, 2026 | 82.32 | 86.85 | 77.00 | 86.59 | 86.59 | 4.63% | 710,794 |
| Feb 20, 2026 | 83.26 | 83.69 | 80.72 | 82.76 | 82.76 | -0.40% | 577,977 |
| Feb 19, 2026 | 81.88 | 83.22 | 80.59 | 83.09 | 83.09 | 0.12% | 383,439 |
| Feb 18, 2026 | 81.59 | 83.40 | 81.59 | 82.99 | 82.99 | 0.64% | 408,213 |
| Feb 17, 2026 | 81.07 | 83.13 | 80.40 | 82.46 | 82.46 | 1.19% | 364,716 |
| Feb 13, 2026 | 81.99 | 84.06 | 80.59 | 81.49 | 81.49 | -0.54% | 428,353 |
| Feb 12, 2026 | 84.07 | 84.72 | 81.56 | 81.93 | 81.93 | -1.87% | 352,498 |
| Feb 11, 2026 | 83.46 | 84.82 | 80.99 | 83.49 | 83.49 | -0.46% | 349,380 |
| Feb 10, 2026 | 83.00 | 84.90 | 82.65 | 83.88 | 83.88 | 0.67% | 442,583 |
| Feb 9, 2026 | 83.47 | 83.90 | 82.21 | 83.32 | 83.32 | -1.38% | 321,785 |
| Feb 6, 2026 | 82.11 | 85.05 | 81.55 | 84.49 | 84.49 | 4.74% | 812,792 |
| Feb 5, 2026 | 83.62 | 85.43 | 80.20 | 80.67 | 80.67 | -3.16% | 457,064 |
| Feb 4, 2026 | 85.59 | 85.60 | 81.00 | 83.30 | 83.30 | -2.68% | 1,077,544 |
| Feb 3, 2026 | 83.09 | 86.10 | 82.88 | 85.59 | 85.59 | 3.06% | 769,376 |
| Feb 2, 2026 | 81.80 | 84.55 | 81.14 | 83.05 | 83.05 | 1.53% | 1,273,115 |
| Jan 30, 2026 | 79.77 | 82.56 | 78.75 | 81.80 | 81.80 | 2.60% | 1,174,011 |
| Jan 29, 2026 | 81.39 | 82.49 | 77.70 | 79.73 | 79.73 | -2.48% | 952,527 |
| Jan 28, 2026 | 82.45 | 83.69 | 80.00 | 81.76 | 81.76 | -1.59% | 776,734 |
| Jan 27, 2026 | 82.00 | 83.87 | 82.00 | 83.08 | 83.08 | 0.95% | 507,153 |
| Jan 26, 2026 | 82.53 | 84.32 | 81.94 | 82.30 | 82.30 | -0.96% | 474,019 |
| Jan 23, 2026 | 84.62 | 85.50 | 82.67 | 83.10 | 83.10 | -1.99% | 569,261 |
| Jan 22, 2026 | 82.83 | 85.20 | 80.65 | 84.79 | 84.79 | 1.07% | 609,099 |
| Jan 21, 2026 | 82.51 | 83.96 | 80.27 | 83.89 | 83.89 | 0.56% | 1,086,072 |
| Jan 20, 2026 | 81.16 | 83.63 | 79.87 | 83.42 | 83.42 | 1.74% | 901,339 |
| Jan 16, 2026 | 84.51 | 84.67 | 81.47 | 81.99 | 81.99 | -3.26% | 664,933 |
| Jan 15, 2026 | 84.60 | 87.44 | 84.33 | 84.75 | 84.75 | -0.56% | 839,322 |
| Jan 14, 2026 | 80.85 | 85.30 | 80.47 | 85.23 | 85.23 | 4.76% | 1,052,669 |
| Jan 13, 2026 | 79.88 | 82.74 | 79.64 | 81.36 | 81.36 | 1.38% | 799,008 |
| Jan 12, 2026 | 79.49 | 81.09 | 78.75 | 80.25 | 80.25 | 0.04% | 739,820 |
| Jan 9, 2026 | 80.20 | 81.40 | 79.38 | 80.22 | 80.22 | 0.02% | 983,627 |
| Jan 8, 2026 | 81.05 | 82.14 | 79.22 | 80.20 | 80.20 | -2.60% | 1,487,973 |
| Jan 7, 2026 | 82.25 | 82.69 | 79.18 | 82.34 | 82.34 | 0.09% | 1,220,452 |
| Jan 6, 2026 | 83.25 | 85.00 | 81.67 | 82.27 | 82.27 | -2.27% | 731,149 |
| Jan 5, 2026 | 87.53 | 87.53 | 82.92 | 84.18 | 84.18 | -3.44% | 1,028,183 |
| Jan 2, 2026 | 86.54 | 88.16 | 85.19 | 87.18 | 87.18 | -0.18% | 751,665 |
| Dec 31, 2025 | 87.32 | 88.23 | 85.98 | 87.34 | 87.34 | 0.09% | 615,725 |
| Dec 30, 2025 | 87.94 | 88.32 | 86.12 | 87.26 | 87.26 | -0.76% | 343,984 |
| Dec 29, 2025 | 88.66 | 89.10 | 87.30 | 87.93 | 87.93 | -0.96% | 373,123 |
| Dec 26, 2025 | 88.78 | 89.61 | 87.47 | 88.78 | 88.78 | -0.07% | 390,105 |
| Dec 24, 2025 | 88.53 | 89.47 | 87.47 | 88.84 | 88.84 | 0.12% | 154,063 |
| Dec 23, 2025 | 87.27 | 90.00 | 87.27 | 88.73 | 88.73 | 1.51% | 329,131 |
| Dec 22, 2025 | 85.33 | 88.13 | 84.88 | 87.41 | 87.41 | 1.58% | 661,134 |
| Dec 19, 2025 | 86.58 | 87.73 | 84.81 | 86.05 | 86.05 | 0.30% | 1,736,461 |
| Dec 18, 2025 | 89.35 | 90.02 | 84.11 | 85.79 | 85.79 | -3.97% | 2,227,544 |
| Dec 17, 2025 | 91.41 | 92.54 | 88.38 | 89.34 | 89.34 | -2.40% | 821,795 |
| Dec 16, 2025 | 93.93 | 94.54 | 90.18 | 91.54 | 91.54 | -3.43% | 881,124 |