NASDAQ : PRTA
Prothena Corporation plc — Price history
Healthcare · Biotechnology · Ireland
Last price 8.47 USD (Oct 30, 2026, 4:00 PM EDT) · Market cap 434.82M
Overview · Financial statements · Key statistics · Dividends · Company profile · Price history · Reports
Price history
Prothena Corporation plc (PRTA) closed at 8.47 USD on 2026-10-30. Daily open, high, low, close and volume for recent sessions:
| Date | Open | High | Low | Close | Volume | Change |
|---|---|---|---|---|---|---|
| 2026-10-30 | 8.79 | 8.9 | 8.35 | 8.47 | 452,298 | -4.62% |
| 2026-10-29 | 9.1 | 9.26 | 8.75 | 8.88 | 370,069 | -2.42% |
| 2026-10-28 | 8.64 | 9.22 | 8.605 | 9.1 | 751,998 | +3.29% |
| 2026-10-27 | 8.4 | 8.85 | 8.35 | 8.81 | 654,353 | +4.88% |
| 2026-10-26 | 8.34 | 8.49 | 8.21 | 8.4 | 594,545 | +2.44% |
| 2026-10-23 | 8.18 | 8.268 | 7.93 | 8.2 | 386,145 | -0.61% |
| 2026-10-22 | 8.01 | 8.285 | 7.96 | 8.25 | 381,831 | +2.74% |
| 2026-10-21 | 8.47 | 8.54 | 8.01 | 8.03 | 461,394 | -5.53% |
| 2026-10-20 | 8.55 | 8.645 | 8.45 | 8.5 | 529,034 | +0.24% |
| 2026-10-19 | 8.39 | 8.57 | 8.31 | 8.48 | 361,132 | +1.56% |
| 2026-10-16 | 8.58 | 8.62 | 8.24 | 8.35 | 670,257 | -1.76% |
| 2026-10-15 | 8.54 | 8.65 | 8.44 | 8.5 | 358,380 | +1.55% |
| 2026-10-14 | 8.28 | 8.56 | 8.19 | 8.37 | 620,027 | +0.12% |
| 2026-10-13 | 8.45 | 8.55 | 8.2 | 8.36 | 573,312 | -0.83% |
| 2026-10-12 | 8.81 | 8.81 | 8.395 | 8.43 | 489,760 | -4.64% |
| 2026-10-09 | 8.57 | 9.305 | 8.5 | 8.84 | 931,625 | +2.67% |
| 2026-10-08 | 8.43 | 8.81 | 8.36 | 8.61 | 642,408 | +1.53% |
| 2026-10-07 | 7.93 | 8.63 | 7.88 | 8.48 | 690,412 | +5.74% |
| 2026-10-06 | 8.28 | 8.28 | 7.8 | 8.02 | 510,607 | -3.02% |
| 2026-10-05 | 8.335 | 8.37 | 7.91 | 8.27 | 714,462 | -1.08% |
| 2026-10-02 | 8.62 | 8.62 | 8.35 | 8.36 | 675,839 | -2.11% |
| 2026-10-01 | 8.54 | 8.58 | 8.35 | 8.54 | 457,092 | +1.91% |
| 2026-09-30 | 8.98 | 8.99 | 8.365 | 8.38 | 634,780 | -4.56% |
| 2026-09-29 | 8.66 | 8.8 | 8.59 | 8.78 | 602,979 | +0.69% |
| 2026-09-28 | 8.25 | 8.86 | 8.073 | 8.72 | 488,859 | +5.19% |
| 2026-09-25 | 8.38 | 8.52 | 8.185 | 8.29 | 481,048 | -0.36% |
| 2026-09-24 | 8.63 | 8.73 | 8.28 | 8.32 | 426,063 | -4.15% |
| 2026-09-23 | 8.94 | 8.97 | 8.665 | 8.68 | 357,843 | -3.45% |
| 2026-09-22 | 8.72 | 9.09 | 8.7 | 8.99 | 445,500 | +5.64% |
| 2026-09-21 | 8.59 | 8.795 | 8.46 | 8.51 | 363,158 | -0.82% |
| 2026-09-18 | 8.41 | 8.6 | 8.25 | 8.58 | 1,830,892 | +1.42% |
| 2026-09-17 | 8.39 | 8.56 | 8.23 | 8.46 | 404,760 | +2.67% |
| 2026-09-16 | 8.35 | 8.5 | 8.2 | 8.24 | 398,337 | -1.08% |
| 2026-09-15 | 8.86 | 8.86 | 8.295 | 8.33 | 323,438 | -5.98% |
| 2026-09-14 | 8.95 | 8.99 | 8.79 | 8.86 | 374,872 | -0.78% |
| 2026-09-11 | 9.06 | 9.14 | 8.765 | 8.93 | 376,275 | -1.00% |
| 2026-09-10 | 9.25 | 9.255 | 8.97 | 9.02 | 310,912 | -3.01% |
| 2026-09-09 | 9.4 | 9.496 | 9.22 | 9.3 | 294,558 | -2.52% |
| 2026-09-08 | 9.6 | 9.67 | 9.345 | 9.54 | 305,440 | -2.85% |
| 2026-09-04 | 9.5 | 9.87 | 9.48 | 9.82 | 383,928 | +2.29% |
| 2026-09-03 | 9.77 | 9.78 | 9.512 | 9.6 | 277,055 | -0.88% |
| 2026-09-02 | 9.64 | 9.75 | 9.37 | 9.685 | 341,055 | +0.78% |
| 2026-09-01 | 9.28 | 9.63 | 9.26 | 9.61 | 267,669 | +2.78% |
| 2026-08-31 | 9.26 | 9.4 | 9.1 | 9.35 | 335,149 | +0.21% |
| 2026-08-28 | 9.02 | 9.479 | 8.95 | 9.33 | 498,115 | +2.64% |
| 2026-08-27 | 9.16 | 9.24 | 8.95 | 9.09 | 338,921 | -1.73% |
| 2026-08-26 | 9.4 | 9.4 | 9.153 | 9.25 | 289,040 | -1.80% |
| 2026-08-25 | 9.51 | 9.82 | 9.42 | 9.42 | 363,713 | +0.32% |
| 2026-08-24 | 9.46 | 9.49 | 9.19 | 9.39 | 248,124 | -0.63% |
| 2026-08-21 | 9.11 | 9.52 | 9.09 | 9.45 | 376,044 | +4.65% |
| 2026-08-20 | 9.13 | 9.145 | 8.71 | 9.03 | 345,968 | -2.80% |
| 2026-08-19 | 8.91 | 9.34 | 8.91 | 9.29 | 385,539 | +6.66% |
| 2026-08-18 | 8.88 | 9 | 8.58 | 8.71 | 248,560 | -1.91% |
| 2026-08-17 | 8.84 | 9.075 | 8.729 | 8.88 | 365,922 | +0.23% |
| 2026-08-14 | 9.04 | 9.15 | 8.839 | 8.86 | 312,600 | -2.42% |
| 2026-08-13 | 9.3 | 9.365 | 9.04 | 9.08 | 343,057 | -1.94% |
| 2026-08-12 | 9.22 | 9.31 | 9.09 | 9.26 | 274,927 | +0.43% |
| 2026-08-11 | 9.12 | 9.285 | 8.862 | 9.22 | 475,252 | +1.10% |
| 2026-08-10 | 8.76 | 9.17 | 8.53 | 9.12 | 713,687 | +4.11% |
| 2026-08-07 | 8.54 | 8.85 | 8.04 | 8.76 | 481,884 | +2.10% |
| 2026-08-06 | 8.5 | 8.766 | 8.33 | 8.58 | 418,686 | +1.06% |
| 2026-08-05 | 8.49 | 8.735 | 8.405 | 8.49 | 489,491 | +0.00% |
| 2026-08-04 | 8.33 | 8.58 | 8.33 | 8.49 | 329,913 | +1.92% |
| 2026-08-03 | 8.17 | 8.38 | 8.04 | 8.33 | 566,000 | +2.59% |
| 2026-07-31 | 8.41 | 8.51 | 8 | 8.12 | 545,490 | -3.45% |
| 2026-07-30 | 8.5 | 8.555 | 8.255 | 8.41 | 502,233 | -1.75% |
| 2026-07-29 | 8.45 | 8.68 | 8.39 | 8.56 | 641,215 | +0.00% |
| 2026-07-28 | 8.7 | 8.78 | 8.36 | 8.56 | 802,255 | -1.61% |
| 2026-07-27 | 8.88 | 9.13 | 8.66 | 8.7 | 704,707 | -0.57% |
| 2026-07-24 | 8.54 | 8.825 | 8.35 | 8.75 | 576,837 | +2.58% |
| 2026-07-23 | 8.27 | 8.625 | 8.23 | 8.53 | 532,213 | +1.07% |
| 2026-07-22 | 8.69 | 8.79 | 8.43 | 8.44 | 542,549 | -3.54% |
| 2026-07-21 | 8.72 | 8.81 | 8.51 | 8.75 | 647,644 | +0.92% |
| 2026-07-20 | 8.66 | 8.85 | 8.545 | 8.67 | 549,625 | +0.12% |
| 2026-07-17 | 8.4 | 8.799 | 8.275 | 8.66 | 408,386 | +2.24% |
| 2026-07-16 | 8.4 | 8.66 | 8.075 | 8.47 | 659,662 | +0.47% |
| 2026-07-15 | 8.58 | 8.63 | 8.42 | 8.43 | 504,691 | -2.43% |
| 2026-07-14 | 8.77 | 8.88 | 8.61 | 8.64 | 530,318 | -2.15% |
| 2026-07-13 | 9.17 | 9.19 | 8.76 | 8.83 | 781,732 | -4.44% |
| 2026-07-10 | 9.64 | 9.82 | 9.03 | 9.24 | 505,129 | -4.15% |
| 2026-07-09 | 9.83 | 10.02 | 9.55 | 9.64 | 482,229 | -2.13% |
| 2026-07-08 | 9.66 | 9.86 | 9.56 | 9.85 | 444,245 | +1.76% |
| 2026-07-07 | 9.62 | 9.78 | 9.33 | 9.68 | 520,541 | +1.89% |
| 2026-07-06 | 9.65 | 9.84 | 9.465 | 9.5 | 403,737 | -1.96% |
| 2026-07-02 | 9.61 | 10.15 | 9.57 | 9.69 | 462,875 | +1.15% |
| 2026-07-01 | 9.74 | 10 | 9.47 | 9.58 | 436,692 | -2.15% |
| 2026-06-30 | 9.96 | 10.04 | 9.75 | 9.79 | 339,636 | -1.81% |
| 2026-06-29 | 10 | 10.12 | 9.78 | 9.97 | 420,298 | -0.50% |
| 2026-06-26 | 9.32 | 10.09 | 9.28 | 10.02 | 1,914,376 | +8.09% |
| 2026-06-25 | 9.42 | 9.58 | 9.19 | 9.27 | 964,889 | -1.38% |
| 2026-06-24 | 9.57 | 9.87 | 9.263 | 9.4 | 477,913 | -1.57% |
| 2026-06-23 | 9.12 | 9.77 | 9.12 | 9.55 | 458,044 | +4.37% |
| 2026-06-22 | 8.9 | 9.27 | 8.89 | 9.15 | 612,544 | +2.46% |
| 2026-06-18 | 8.63 | 9.15 | 8.515 | 8.93 | 1,390,843 | +5.18% |
| 2026-06-17 | 8.39 | 8.72 | 8.39 | 8.49 | 542,968 | +2.41% |
| 2026-06-16 | 8.16 | 8.35 | 7.85 | 8.29 | 586,273 | +1.72% |
| 2026-06-15 | 8.69 | 8.77 | 7.93 | 8.15 | 622,611 | -1.21% |
| 2026-06-12 | 8.26 | 8.45 | 8.225 | 8.25 | 315,405 | -0.12% |
| 2026-06-11 | 7.89 | 8.46 | 7.73 | 8.26 | 634,229 | +4.42% |
| 2026-06-10 | 8.42 | 8.59 | 7.89 | 7.91 | 456,981 | -6.61% |
| 2026-06-09 | 8.56 | 8.87 | 8.345 | 8.47 | 493,477 | -1.05% |
| 2026-06-08 | 8.8 | 8.89 | 8.53 | 8.56 | 313,207 | -2.62% |
| 2026-06-05 | 9.25 | 9.38 | 8.63 | 8.79 | 656,306 | -4.97% |
| 2026-06-04 | 9.03 | 9.45 | 9.03 | 9.25 | 504,872 | +3.70% |
| 2026-06-03 | 9.21 | 9.21 | 8.73 | 8.92 | 593,186 | -2.94% |
| 2026-06-02 | 9.59 | 9.59 | 9.119 | 9.19 | 439,010 | -4.17% |
| 2026-06-01 | 10.03 | 10.07 | 9.495 | 9.59 | 457,810 | -5.80% |
| 2026-05-29 | 9.93 | 10.235 | 9.8 | 10.18 | 501,434 | +2.00% |
| 2026-05-28 | 9.95 | 10.05 | 9.93 | 9.98 | 281,818 | -0.50% |
| 2026-05-27 | 10.11 | 10.26 | 10.005 | 10.03 | 616,187 | -0.30% |
| 2026-05-26 | 9.84 | 10.07 | 9.45 | 10.06 | 918,666 | +2.34% |
| 2026-05-22 | 9.36 | 10 | 9.36 | 9.83 | 510,853 | +4.46% |
| 2026-05-21 | 9.16 | 9.42 | 9.04 | 9.41 | 388,741 | +0.64% |
| 2026-05-20 | 9.09 | 9.41 | 9.09 | 9.35 | 624,875 | +3.09% |
| 2026-05-19 | 9.61 | 9.84 | 9.02 | 9.07 | 627,307 | -5.42% |
| 2026-05-18 | 9.66 | 10.09 | 9.53 | 9.59 | 650,972 | -1.74% |
| 2026-05-15 | 9.73 | 9.86 | 9.46 | 9.76 | 700,063 | -1.01% |
| 2026-05-14 | 9.6 | 9.88 | 9.42 | 9.86 | 452,435 | +2.71% |
| 2026-05-13 | 9.33 | 9.73 | 9.28 | 9.6 | 530,784 | +1.80% |
| 2026-05-12 | 9.67 | 9.82 | 9.285 | 9.43 | 495,103 | -2.48% |