Prothena Corporation plc (PRTA)
NASDAQ: PRTA · Real-Time Price · USD
9.41
+0.05 (0.53%)
At close: Sep 26, 2025, 4:00 PM EDT
9.35
-0.06 (-0.64%)
After-hours: Sep 26, 2025, 7:53 PM EDT
Prothena Corporation Stock Price History
Historical Data
| Date | Open | High | Low | Close | Adj. Close | Change | Volume |
|---|---|---|---|---|---|---|---|
| Sep 26, 2025 | 9.29 | 9.46 | 9.02 | 9.41 | 9.41 | 0.53% | 715,256 |
| Sep 25, 2025 | 9.20 | 9.56 | 9.04 | 9.36 | 9.36 | 0.43% | 1,566,775 |
| Sep 24, 2025 | 8.32 | 9.34 | 8.30 | 9.32 | 9.32 | 12.15% | 1,116,744 |
| Sep 23, 2025 | 8.28 | 8.35 | 8.14 | 8.31 | 8.31 | 0.24% | 404,696 |
| Sep 22, 2025 | 8.12 | 8.43 | 8.02 | 8.29 | 8.29 | 2.73% | 511,942 |
| Sep 19, 2025 | 8.20 | 8.23 | 8.07 | 8.07 | 8.07 | -1.34% | 910,686 |
| Sep 18, 2025 | 8.18 | 8.35 | 8.05 | 8.18 | 8.18 | 1.49% | 459,057 |
| Sep 17, 2025 | 8.19 | 8.39 | 8.04 | 8.06 | 8.06 | -1.23% | 507,619 |
| Sep 16, 2025 | 8.12 | 8.36 | 8.12 | 8.16 | 8.16 | - | 362,452 |
| Sep 15, 2025 | 8.18 | 8.35 | 8.10 | 8.16 | 8.16 | -0.61% | 713,691 |
| Sep 12, 2025 | 8.43 | 8.49 | 8.20 | 8.21 | 8.21 | -2.61% | 551,060 |
| Sep 11, 2025 | 8.24 | 8.50 | 8.19 | 8.43 | 8.43 | 1.51% | 711,934 |
| Sep 10, 2025 | 8.34 | 8.47 | 8.20 | 8.31 | 8.31 | -0.42% | 518,651 |
| Sep 9, 2025 | 8.50 | 8.50 | 8.10 | 8.34 | 8.34 | -1.77% | 916,203 |
| Sep 8, 2025 | 8.61 | 8.62 | 8.30 | 8.49 | 8.49 | -0.70% | 622,009 |
| Sep 5, 2025 | 8.24 | 8.59 | 8.21 | 8.55 | 8.55 | 4.14% | 1,128,164 |
| Sep 4, 2025 | 8.45 | 8.46 | 8.11 | 8.21 | 8.21 | -2.15% | 961,597 |
| Sep 3, 2025 | 8.24 | 8.47 | 8.16 | 8.39 | 8.39 | 1.45% | 1,187,425 |
| Sep 2, 2025 | 8.17 | 8.43 | 8.06 | 8.27 | 8.27 | 0.85% | 1,048,928 |
| Aug 29, 2025 | 8.27 | 8.34 | 8.08 | 8.20 | 8.20 | -0.49% | 903,119 |
| Aug 28, 2025 | 8.22 | 8.58 | 8.05 | 8.24 | 8.24 | -3.74% | 1,711,298 |
| Aug 27, 2025 | 8.36 | 8.73 | 8.35 | 8.56 | 8.56 | 2.51% | 1,021,264 |
| Aug 26, 2025 | 8.35 | 8.56 | 8.30 | 8.35 | 8.35 | -0.36% | 1,653,408 |
| Aug 25, 2025 | 8.76 | 8.79 | 8.35 | 8.38 | 8.38 | -4.45% | 613,157 |
| Aug 22, 2025 | 8.63 | 8.97 | 8.52 | 8.77 | 8.77 | 2.45% | 1,244,739 |
| Aug 21, 2025 | 8.41 | 8.57 | 8.32 | 8.56 | 8.56 | 0.47% | 858,008 |
| Aug 20, 2025 | 8.50 | 8.60 | 8.28 | 8.52 | 8.52 | - | 639,174 |
| Aug 19, 2025 | 8.51 | 8.70 | 8.35 | 8.52 | 8.52 | -0.12% | 829,930 |
| Aug 18, 2025 | 8.36 | 8.66 | 8.30 | 8.53 | 8.53 | 3.39% | 1,164,541 |
| Aug 15, 2025 | 8.11 | 8.34 | 8.00 | 8.25 | 8.25 | 2.36% | 1,130,318 |
| Aug 14, 2025 | 8.02 | 8.12 | 7.78 | 8.06 | 8.06 | 0.12% | 590,370 |
| Aug 13, 2025 | 7.60 | 8.17 | 7.58 | 8.05 | 8.05 | 6.76% | 1,598,596 |
| Aug 12, 2025 | 7.77 | 7.96 | 7.50 | 7.54 | 7.54 | -1.69% | 926,650 |
| Aug 11, 2025 | 7.70 | 7.85 | 7.39 | 7.67 | 7.67 | -0.26% | 1,147,187 |
| Aug 8, 2025 | 7.74 | 7.94 | 7.64 | 7.69 | 7.69 | -0.39% | 921,633 |
| Aug 7, 2025 | 7.98 | 7.98 | 7.52 | 7.72 | 7.72 | -2.53% | 1,092,136 |
| Aug 6, 2025 | 7.52 | 8.01 | 7.28 | 7.92 | 7.92 | 12.66% | 3,107,286 |
| Aug 5, 2025 | 7.03 | 7.54 | 6.73 | 7.03 | 7.03 | 1.30% | 1,565,289 |
| Aug 4, 2025 | 6.85 | 6.99 | 6.70 | 6.94 | 6.94 | 1.91% | 957,884 |
| Aug 1, 2025 | 6.80 | 6.87 | 6.61 | 6.81 | 6.81 | -0.87% | 859,928 |
| Jul 31, 2025 | 6.91 | 7.23 | 6.83 | 6.87 | 6.87 | -0.15% | 994,942 |
| Jul 30, 2025 | 7.00 | 7.33 | 6.74 | 6.88 | 6.88 | -0.72% | 1,240,795 |
| Jul 29, 2025 | 6.89 | 7.10 | 6.80 | 6.93 | 6.93 | 0.87% | 724,885 |
| Jul 28, 2025 | 6.71 | 6.89 | 6.63 | 6.87 | 6.87 | 2.84% | 804,766 |
| Jul 25, 2025 | 6.75 | 6.86 | 6.58 | 6.68 | 6.68 | -0.30% | 772,127 |
| Jul 24, 2025 | 6.72 | 6.76 | 6.54 | 6.70 | 6.70 | -0.89% | 735,590 |
| Jul 23, 2025 | 6.54 | 6.94 | 6.51 | 6.76 | 6.76 | 3.52% | 899,115 |
| Jul 22, 2025 | 6.31 | 6.59 | 6.29 | 6.53 | 6.53 | 3.82% | 722,348 |
| Jul 21, 2025 | 6.27 | 6.52 | 6.24 | 6.29 | 6.29 | 0.48% | 686,670 |
| Jul 18, 2025 | 6.54 | 6.62 | 6.25 | 6.26 | 6.26 | -3.25% | 788,843 |