Protagonist Therapeutics, Inc. (PTGX)
NASDAQ: PTGX · Real-Time Price · USD
101.21
+2.70 (2.74%)
At close: Apr 28, 2026, 4:00 PM EDT
103.23
+2.02 (2.00%)
After-hours: Apr 28, 2026, 5:32 PM EDT
Protagonist Therapeutics Stock Price History
Historical Data
| Date | Open | High | Low | Close | Adj. Close | Change | Volume |
|---|---|---|---|---|---|---|---|
| Apr 28, 2026 | 99.50 | 102.47 | 97.79 | 101.25 | 101.25 | 2.78% | 659,705 |
| Apr 27, 2026 | 100.44 | 103.42 | 98.31 | 98.51 | 98.51 | -1.49% | 994,861 |
| Apr 24, 2026 | 102.54 | 105.94 | 98.91 | 100.00 | 100.00 | -2.55% | 673,090 |
| Apr 23, 2026 | 106.34 | 106.98 | 102.26 | 102.62 | 102.62 | -2.78% | 651,592 |
| Apr 22, 2026 | 106.43 | 107.00 | 103.93 | 105.55 | 105.55 | -0.32% | 345,047 |
| Apr 21, 2026 | 104.94 | 106.45 | 103.64 | 105.89 | 105.89 | 0.40% | 494,720 |
| Apr 20, 2026 | 105.47 | 106.46 | 104.00 | 105.47 | 105.47 | -0.48% | 536,526 |
| Apr 17, 2026 | 105.57 | 106.90 | 103.51 | 105.98 | 105.98 | 2.17% | 1,000,775 |
| Apr 16, 2026 | 103.59 | 104.53 | 102.46 | 103.73 | 103.73 | -1.62% | 415,250 |
| Apr 15, 2026 | 105.96 | 106.66 | 103.02 | 105.44 | 105.44 | 0.69% | 763,201 |
| Apr 14, 2026 | 97.58 | 104.97 | 97.58 | 104.72 | 104.72 | 7.33% | 704,518 |
| Apr 13, 2026 | 98.61 | 101.04 | 95.40 | 97.57 | 97.57 | -1.26% | 1,088,545 |
| Apr 10, 2026 | 104.28 | 104.28 | 98.40 | 98.82 | 98.82 | -5.06% | 577,287 |
| Apr 9, 2026 | 101.45 | 105.11 | 101.45 | 104.09 | 104.09 | 1.95% | 699,455 |
| Apr 8, 2026 | 104.28 | 105.88 | 101.62 | 102.09 | 102.09 | -1.60% | 819,198 |
| Apr 7, 2026 | 103.43 | 103.96 | 101.31 | 103.75 | 103.75 | 0.84% | 780,162 |
| Apr 6, 2026 | 103.72 | 104.46 | 101.84 | 102.89 | 102.89 | -0.86% | 483,856 |
| Apr 2, 2026 | 101.59 | 104.31 | 101.59 | 103.78 | 103.78 | 0.11% | 601,602 |
| Apr 1, 2026 | 105.51 | 107.84 | 102.70 | 103.67 | 103.67 | -1.64% | 583,084 |
| Mar 31, 2026 | 101.23 | 105.99 | 101.06 | 105.40 | 105.40 | 5.54% | 944,448 |
| Mar 30, 2026 | 99.04 | 102.76 | 98.08 | 99.87 | 99.87 | 0.91% | 884,395 |
| Mar 27, 2026 | 101.27 | 101.92 | 97.89 | 98.97 | 98.97 | -3.13% | 785,508 |
| Mar 26, 2026 | 103.25 | 105.69 | 102.01 | 102.17 | 102.17 | -2.05% | 1,045,268 |
| Mar 25, 2026 | 99.42 | 105.00 | 97.16 | 104.31 | 104.31 | 3.90% | 812,152 |
| Mar 24, 2026 | 97.16 | 100.98 | 97.16 | 100.39 | 100.39 | 1.88% | 940,176 |
| Mar 23, 2026 | 100.00 | 102.06 | 98.15 | 98.54 | 98.54 | -0.33% | 925,423 |
| Mar 20, 2026 | 101.47 | 101.80 | 97.83 | 98.87 | 98.87 | -2.76% | 2,029,217 |
| Mar 19, 2026 | 98.45 | 105.69 | 98.35 | 101.68 | 101.68 | 4.73% | 1,919,749 |
| Mar 18, 2026 | 97.04 | 99.50 | 90.58 | 97.09 | 97.09 | -0.14% | 1,981,543 |
| Mar 17, 2026 | 96.70 | 99.31 | 96.43 | 97.23 | 97.23 | 0.50% | 799,232 |
| Mar 16, 2026 | 93.28 | 97.08 | 92.61 | 96.75 | 96.75 | 4.75% | 695,757 |
| Mar 13, 2026 | 96.91 | 98.30 | 90.92 | 92.36 | 92.36 | -3.21% | 896,180 |
| Mar 12, 2026 | 95.01 | 96.39 | 93.67 | 95.42 | 95.42 | -1.10% | 750,591 |
| Mar 11, 2026 | 96.84 | 98.32 | 95.97 | 96.48 | 96.48 | -0.59% | 788,741 |
| Mar 10, 2026 | 96.02 | 98.21 | 95.40 | 97.05 | 97.05 | 0.40% | 856,024 |
| Mar 9, 2026 | 91.14 | 97.54 | 91.14 | 96.66 | 96.66 | 4.96% | 727,214 |
| Mar 6, 2026 | 89.96 | 92.97 | 87.82 | 92.09 | 92.09 | 0.74% | 572,368 |
| Mar 5, 2026 | 94.54 | 94.54 | 90.35 | 91.41 | 91.41 | -3.61% | 677,477 |
| Mar 4, 2026 | 91.94 | 95.43 | 91.03 | 94.83 | 94.83 | 3.87% | 782,718 |
| Mar 3, 2026 | 92.56 | 93.51 | 90.02 | 91.30 | 91.30 | -3.12% | 529,537 |
| Mar 2, 2026 | 92.08 | 94.89 | 90.99 | 94.24 | 94.24 | 2.35% | 942,703 |
| Feb 27, 2026 | 88.18 | 92.23 | 87.15 | 92.08 | 92.08 | 4.17% | 936,969 |
| Feb 26, 2026 | 87.50 | 88.83 | 85.60 | 88.39 | 88.39 | 1.48% | 706,162 |
| Feb 25, 2026 | 87.50 | 88.46 | 86.26 | 87.10 | 87.10 | -0.33% | 285,861 |
| 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% | 710,805 |
| 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% | 384,567 |
| 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% | 364,763 |
| Feb 13, 2026 | 81.99 | 84.06 | 80.59 | 81.49 | 81.49 | -0.54% | 428,856 |
| 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% | 350,174 |
| 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% | 322,026 |
| Feb 6, 2026 | 82.11 | 85.05 | 81.55 | 84.49 | 84.49 | 4.74% | 812,801 |
| Feb 5, 2026 | 83.62 | 85.43 | 80.20 | 80.67 | 80.67 | -3.16% | 457,128 |
| Feb 4, 2026 | 85.59 | 85.60 | 81.00 | 83.30 | 83.30 | -2.68% | 1,077,554 |
| Feb 3, 2026 | 83.09 | 86.10 | 82.88 | 85.59 | 85.59 | 3.06% | 769,388 |
| Feb 2, 2026 | 81.80 | 84.55 | 81.14 | 83.05 | 83.05 | 1.53% | 1,414,710 |
| Jan 30, 2026 | 79.77 | 82.56 | 78.75 | 81.80 | 81.80 | 2.60% | 1,174,012 |
| Jan 29, 2026 | 81.39 | 82.49 | 77.70 | 79.73 | 79.73 | -2.48% | 952,738 |
| Jan 28, 2026 | 82.45 | 83.69 | 80.00 | 81.76 | 81.76 | -1.59% | 777,238 |
| Jan 27, 2026 | 82.00 | 83.87 | 82.00 | 83.08 | 83.08 | 0.95% | 507,807 |
| Jan 26, 2026 | 82.53 | 84.32 | 81.94 | 82.30 | 82.30 | -0.96% | 529,199 |
| 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 |
| Dec 15, 2025 | 95.41 | 96.54 | 94.17 | 94.79 | 94.79 | -0.59% | 959,980 |
| Dec 12, 2025 | 92.72 | 95.39 | 91.70 | 95.35 | 95.35 | 3.36% | 1,287,130 |
| Dec 11, 2025 | 92.01 | 93.07 | 91.07 | 92.25 | 92.25 | 0.95% | 800,761 |
| Dec 10, 2025 | 88.56 | 91.96 | 88.34 | 91.38 | 91.38 | 3.18% | 1,308,400 |
| Dec 9, 2025 | 89.73 | 92.80 | 88.30 | 88.56 | 88.56 | -1.87% | 1,440,173 |
| Dec 8, 2025 | 90.94 | 91.89 | 89.51 | 90.25 | 90.25 | 0.67% | 1,455,768 |
| Dec 5, 2025 | 87.96 | 90.18 | 87.54 | 89.65 | 89.65 | 2.66% | 1,473,127 |
| Dec 4, 2025 | 86.07 | 88.10 | 85.13 | 87.33 | 87.33 | 1.46% | 736,770 |
| Dec 3, 2025 | 85.43 | 87.10 | 84.73 | 86.07 | 86.07 | 1.68% | 715,548 |