Protagonist Therapeutics, Inc. (PTGX)
NASDAQ: PTGX · Real-Time Price · USD
77.50
+1.77 (2.34%)
At close: Oct 17, 2025, 4:00 PM EDT
77.50
0.00 (0.00%)
Pre-market: Oct 20, 2025, 7:04 AM EDT
Protagonist Therapeutics Stock Price History
Historical Data
| Date | Open | High | Low | Close | Adj. Close | Change | Volume |
|---|---|---|---|---|---|---|---|
| Oct 17, 2025 | 75.60 | 77.58 | 75.17 | 77.50 | 77.50 | 2.34% | 1,210,774 |
| Oct 16, 2025 | 77.81 | 78.00 | 74.62 | 75.73 | 75.73 | -2.51% | 1,931,728 |
| Oct 15, 2025 | 75.29 | 78.15 | 75.29 | 77.68 | 77.68 | 0.96% | 1,149,583 |
| Oct 14, 2025 | 78.49 | 78.49 | 76.00 | 76.94 | 76.94 | -2.82% | 1,885,924 |
| Oct 13, 2025 | 85.28 | 86.76 | 75.04 | 79.17 | 79.17 | -9.00% | 5,941,417 |
| Oct 10, 2025 | 67.39 | 93.25 | 65.75 | 87.00 | 87.00 | 29.77% | 7,065,291 |
| Oct 9, 2025 | 65.56 | 67.57 | 65.56 | 67.04 | 67.04 | 2.66% | 1,058,925 |
| Oct 8, 2025 | 65.28 | 65.77 | 64.50 | 65.30 | 65.30 | -0.26% | 587,495 |
| Oct 7, 2025 | 64.26 | 65.84 | 62.24 | 65.47 | 65.47 | 2.07% | 804,435 |
| Oct 6, 2025 | 65.02 | 66.87 | 63.93 | 64.14 | 64.14 | -1.06% | 886,157 |
| Oct 3, 2025 | 64.59 | 65.38 | 64.56 | 64.83 | 64.83 | -0.23% | 623,633 |
| Oct 2, 2025 | 64.39 | 65.50 | 63.71 | 64.98 | 64.98 | 1.53% | 575,458 |
| Oct 1, 2025 | 66.00 | 66.53 | 63.71 | 64.00 | 64.00 | -3.66% | 1,048,532 |
| Sep 30, 2025 | 65.14 | 67.04 | 65.06 | 66.43 | 66.43 | 1.98% | 1,446,153 |
| Sep 29, 2025 | 67.42 | 68.17 | 63.82 | 65.14 | 65.14 | -3.38% | 2,017,894 |
| Sep 26, 2025 | 65.40 | 68.26 | 64.02 | 67.42 | 67.42 | 4.20% | 1,424,228 |
| Sep 25, 2025 | 65.42 | 66.38 | 64.34 | 64.70 | 64.70 | -1.90% | 806,352 |
| Sep 24, 2025 | 65.00 | 66.70 | 63.83 | 65.95 | 65.95 | 1.37% | 857,043 |
| Sep 23, 2025 | 64.00 | 65.08 | 63.74 | 65.06 | 65.06 | 0.85% | 568,747 |
| Sep 22, 2025 | 62.35 | 64.59 | 61.95 | 64.51 | 64.51 | 3.71% | 702,623 |
| Sep 19, 2025 | 62.22 | 63.30 | 61.64 | 62.20 | 62.20 | 0.10% | 2,461,715 |
| Sep 18, 2025 | 59.55 | 62.21 | 58.91 | 62.14 | 62.14 | 4.93% | 1,358,129 |
| Sep 17, 2025 | 60.05 | 61.34 | 59.02 | 59.22 | 59.22 | 1.08% | 912,792 |
| Sep 16, 2025 | 58.16 | 59.14 | 57.90 | 58.59 | 58.59 | 0.36% | 633,958 |
| Sep 15, 2025 | 58.86 | 59.64 | 57.91 | 58.38 | 58.38 | -0.82% | 929,176 |
| Sep 12, 2025 | 60.40 | 60.40 | 58.75 | 58.86 | 58.86 | -1.37% | 685,843 |
| Sep 11, 2025 | 57.81 | 59.71 | 57.53 | 59.68 | 59.68 | 3.36% | 939,398 |
| Sep 10, 2025 | 58.47 | 58.47 | 57.13 | 57.74 | 57.74 | -1.06% | 843,342 |
| Sep 9, 2025 | 56.50 | 59.31 | 54.50 | 58.36 | 58.36 | 3.86% | 1,483,258 |
| Sep 8, 2025 | 59.50 | 59.50 | 54.60 | 56.19 | 56.19 | -7.17% | 1,643,272 |
| Sep 5, 2025 | 59.34 | 61.04 | 58.03 | 60.53 | 60.53 | 1.56% | 1,926,568 |
| Sep 4, 2025 | 58.22 | 60.71 | 57.45 | 59.60 | 59.60 | 2.56% | 1,473,769 |
| Sep 3, 2025 | 58.25 | 59.51 | 57.49 | 58.11 | 58.11 | -1.26% | 987,685 |
| Sep 2, 2025 | 59.40 | 59.75 | 58.27 | 58.85 | 58.85 | -0.34% | 665,841 |
| Aug 29, 2025 | 58.50 | 59.28 | 57.66 | 59.05 | 59.05 | 1.57% | 792,275 |
| Aug 28, 2025 | 61.46 | 61.89 | 58.07 | 58.14 | 58.14 | -5.36% | 1,003,779 |
| Aug 27, 2025 | 56.71 | 61.50 | 56.71 | 61.43 | 61.43 | 7.79% | 1,426,848 |
| Aug 26, 2025 | 57.28 | 57.50 | 56.58 | 56.99 | 56.99 | 0.19% | 516,415 |
| Aug 25, 2025 | 57.48 | 58.79 | 56.56 | 56.88 | 56.88 | -1.04% | 544,991 |
| Aug 22, 2025 | 56.52 | 57.72 | 56.10 | 57.48 | 57.48 | 2.57% | 470,130 |
| Aug 21, 2025 | 55.54 | 56.47 | 55.26 | 56.04 | 56.04 | -0.34% | 500,861 |
| Aug 20, 2025 | 56.24 | 57.10 | 55.27 | 56.23 | 56.23 | -0.04% | 675,235 |
| Aug 19, 2025 | 56.00 | 56.56 | 55.26 | 56.25 | 56.25 | 0.07% | 528,435 |
| Aug 18, 2025 | 56.04 | 57.99 | 55.51 | 56.21 | 56.21 | 0.25% | 470,840 |
| Aug 15, 2025 | 55.01 | 56.33 | 54.18 | 56.07 | 56.07 | 1.96% | 471,864 |
| Aug 14, 2025 | 56.20 | 56.58 | 54.96 | 54.99 | 54.99 | -3.05% | 629,419 |
| Aug 13, 2025 | 55.10 | 56.85 | 54.57 | 56.72 | 56.72 | 4.02% | 999,386 |
| Aug 12, 2025 | 54.07 | 54.74 | 53.49 | 54.53 | 54.53 | 1.45% | 542,469 |
| Aug 11, 2025 | 51.05 | 53.80 | 50.58 | 53.75 | 53.75 | 5.25% | 866,488 |
| Aug 8, 2025 | 50.94 | 51.41 | 50.49 | 51.07 | 51.07 | 0.22% | 719,206 |