Prothena Corporation plc (PRTA)
NASDAQ: PRTA · Real-Time Price · USD
8.12
-0.29 (-3.45%)
Jul 31, 2026, 4:00 PM EDT - Market closed
Prothena Corporation Stock Price History
| Date | Open | High | Low | Close | Adj. Close | Change | Volume |
|---|---|---|---|---|---|---|---|
| Jul 31, 2026 | 8.41 | 8.51 | 8.00 | 8.12 | 8.12 | -3.45% | 545,490 |
| Jul 30, 2026 | 8.50 | 8.56 | 8.26 | 8.41 | 8.41 | -1.75% | 502,233 |
| Jul 29, 2026 | 8.45 | 8.68 | 8.39 | 8.56 | 8.56 | - | 641,213 |
| Jul 28, 2026 | 8.70 | 8.78 | 8.36 | 8.56 | 8.56 | -1.61% | 802,244 |
| Jul 27, 2026 | 8.88 | 9.13 | 8.66 | 8.70 | 8.70 | -0.57% | 704,606 |
| Jul 24, 2026 | 8.54 | 8.83 | 8.35 | 8.75 | 8.75 | 2.58% | 576,837 |
| Jul 23, 2026 | 8.27 | 8.63 | 8.23 | 8.53 | 8.53 | 1.07% | 532,176 |
| Jul 22, 2026 | 8.69 | 8.79 | 8.43 | 8.44 | 8.44 | -3.54% | 542,547 |
| Jul 21, 2026 | 8.72 | 8.81 | 8.51 | 8.75 | 8.75 | 0.92% | 534,743 |
| Jul 20, 2026 | 8.66 | 8.85 | 8.55 | 8.67 | 8.67 | 0.12% | 549,606 |
| Jul 17, 2026 | 8.40 | 8.80 | 8.28 | 8.66 | 8.66 | 2.24% | 397,184 |
| Jul 16, 2026 | 8.40 | 8.66 | 8.08 | 8.47 | 8.47 | 0.47% | 659,662 |
| Jul 15, 2026 | 8.58 | 8.63 | 8.42 | 8.43 | 8.43 | -2.43% | 504,686 |
| Jul 14, 2026 | 8.77 | 8.88 | 8.61 | 8.64 | 8.64 | -2.15% | 530,318 |
| Jul 13, 2026 | 9.17 | 9.19 | 8.76 | 8.83 | 8.83 | -4.44% | 781,723 |
| Jul 10, 2026 | 9.64 | 9.82 | 9.03 | 9.24 | 9.24 | -4.15% | 505,129 |
| Jul 9, 2026 | 9.83 | 10.02 | 9.55 | 9.64 | 9.64 | -2.13% | 482,222 |
| Jul 8, 2026 | 9.66 | 9.86 | 9.56 | 9.85 | 9.85 | 1.76% | 444,245 |
| Jul 7, 2026 | 9.62 | 9.78 | 9.33 | 9.68 | 9.68 | 1.89% | 520,542 |
| Jul 6, 2026 | 9.65 | 9.84 | 9.47 | 9.50 | 9.50 | -1.96% | 403,737 |
| Jul 2, 2026 | 9.61 | 10.15 | 9.57 | 9.69 | 9.69 | 1.15% | 462,875 |
| Jul 1, 2026 | 9.74 | 10.00 | 9.47 | 9.58 | 9.58 | -2.15% | 436,672 |
| Jun 30, 2026 | 9.96 | 10.04 | 9.75 | 9.79 | 9.79 | -1.81% | 339,626 |
| Jun 29, 2026 | 10.00 | 10.12 | 9.78 | 9.97 | 9.97 | -0.50% | 420,053 |
| Jun 26, 2026 | 9.32 | 10.09 | 9.28 | 10.02 | 10.02 | 8.09% | 1,913,868 |
| Jun 25, 2026 | 9.42 | 9.58 | 9.19 | 9.27 | 9.27 | -1.38% | 964,889 |
| Jun 24, 2026 | 9.57 | 9.87 | 9.26 | 9.40 | 9.40 | -1.57% | 477,855 |
| Jun 23, 2026 | 9.12 | 9.77 | 9.12 | 9.55 | 9.55 | 4.37% | 458,036 |
| Jun 22, 2026 | 8.90 | 9.27 | 8.89 | 9.15 | 9.15 | 2.46% | 612,353 |
| Jun 18, 2026 | 8.63 | 9.15 | 8.52 | 8.93 | 8.93 | 5.18% | 1,390,682 |
| Jun 17, 2026 | 8.39 | 8.72 | 8.39 | 8.49 | 8.49 | 2.41% | 542,367 |
| Jun 16, 2026 | 8.16 | 8.35 | 7.85 | 8.29 | 8.29 | 1.72% | 585,996 |
| Jun 15, 2026 | 8.69 | 8.77 | 7.93 | 8.15 | 8.15 | -1.21% | 622,341 |
| Jun 12, 2026 | 8.26 | 8.45 | 8.23 | 8.25 | 8.25 | -0.12% | 314,129 |
| Jun 11, 2026 | 7.89 | 8.46 | 7.73 | 8.26 | 8.26 | 4.42% | 633,585 |
| Jun 10, 2026 | 8.42 | 8.59 | 7.89 | 7.91 | 7.91 | -6.61% | 456,644 |
| Jun 9, 2026 | 8.56 | 8.87 | 8.35 | 8.47 | 8.47 | -1.05% | 491,176 |
| Jun 8, 2026 | 8.80 | 8.89 | 8.53 | 8.56 | 8.56 | -2.62% | 312,807 |
| Jun 5, 2026 | 9.25 | 9.38 | 8.63 | 8.79 | 8.79 | -4.97% | 655,718 |
| Jun 4, 2026 | 9.03 | 9.45 | 9.03 | 9.25 | 9.25 | 3.70% | 504,475 |
| Jun 3, 2026 | 9.21 | 9.21 | 8.73 | 8.92 | 8.92 | -2.94% | 593,078 |
| Jun 2, 2026 | 9.59 | 9.59 | 9.12 | 9.19 | 9.19 | -4.17% | 438,610 |
| Jun 1, 2026 | 10.03 | 10.07 | 9.50 | 9.59 | 9.59 | -5.80% | 391,244 |
| May 29, 2026 | 9.93 | 10.24 | 9.80 | 10.18 | 10.18 | 2.00% | 501,434 |
| May 28, 2026 | 9.95 | 10.05 | 9.93 | 9.98 | 9.98 | -0.50% | 281,818 |
| May 27, 2026 | 10.11 | 10.26 | 10.01 | 10.03 | 10.03 | -0.30% | 616,187 |
| May 26, 2026 | 9.84 | 10.07 | 9.45 | 10.06 | 10.06 | 2.34% | 918,666 |
| May 22, 2026 | 9.36 | 10.00 | 9.36 | 9.83 | 9.83 | 4.46% | 510,853 |
| May 21, 2026 | 9.16 | 9.42 | 9.04 | 9.41 | 9.41 | 0.64% | 388,741 |
| May 20, 2026 | 9.09 | 9.41 | 9.09 | 9.35 | 9.35 | 3.09% | 624,875 |