Prothena Corporation plc (PRTA)
NASDAQ: PRTA · Real-Time Price · USD
10.65
-0.14 (-1.30%)
Apr 21, 2026, 1:42 PM EDT - Market open
Prothena Corporation Stock Price History
Historical Data
| Date | Open | High | Low | Close | Adj. Close | Change | Volume |
|---|---|---|---|---|---|---|---|
| Apr 21, 2026 | 10.78 | 10.78 | 10.48 | 10.54 | - | -2.32% | 138,694 |
| Apr 20, 2026 | 10.82 | 10.97 | 10.77 | 10.79 | 10.79 | -1.01% | 318,913 |
| Apr 17, 2026 | 10.71 | 10.99 | 10.70 | 10.90 | 10.90 | 3.61% | 466,143 |
| Apr 16, 2026 | 10.78 | 10.85 | 10.45 | 10.52 | 10.52 | -2.77% | 287,472 |
| Apr 15, 2026 | 10.62 | 10.87 | 10.51 | 10.82 | 10.82 | 1.98% | 382,958 |
| Apr 14, 2026 | 10.34 | 10.67 | 10.34 | 10.61 | 10.61 | 2.91% | 370,555 |
| Apr 13, 2026 | 10.49 | 10.55 | 10.18 | 10.31 | 10.31 | -1.81% | 334,062 |
| Apr 10, 2026 | 10.60 | 10.60 | 10.37 | 10.50 | 10.50 | -0.76% | 313,798 |
| Apr 9, 2026 | 10.47 | 10.70 | 10.38 | 10.58 | 10.58 | -0.66% | 414,710 |
| Apr 8, 2026 | 10.48 | 10.68 | 10.29 | 10.65 | 10.65 | 2.80% | 454,445 |
| Apr 7, 2026 | 9.98 | 10.37 | 9.80 | 10.36 | 10.36 | 3.19% | 481,344 |
| Apr 6, 2026 | 9.91 | 10.11 | 9.88 | 10.04 | 10.04 | 1.83% | 410,502 |
| Apr 2, 2026 | 9.75 | 10.08 | 9.51 | 9.86 | 9.86 | -1.69% | 848,822 |
| Apr 1, 2026 | 9.84 | 10.12 | 9.80 | 10.03 | 10.03 | 3.19% | 593,287 |
| Mar 31, 2026 | 9.33 | 9.86 | 9.33 | 9.72 | 9.72 | 5.08% | 671,532 |
| Mar 30, 2026 | 9.24 | 9.50 | 9.11 | 9.25 | 9.25 | -0.11% | 416,146 |
| Mar 27, 2026 | 9.42 | 9.62 | 9.14 | 9.26 | 9.26 | -2.73% | 430,062 |
| Mar 26, 2026 | 9.19 | 9.68 | 9.16 | 9.52 | 9.52 | 2.26% | 452,666 |
| Mar 25, 2026 | 8.84 | 9.32 | 8.82 | 9.31 | 9.31 | 6.64% | 543,662 |
| Mar 24, 2026 | 8.75 | 8.96 | 8.49 | 8.73 | 8.73 | -1.02% | 534,726 |
| Mar 23, 2026 | 8.83 | 9.04 | 8.76 | 8.82 | 8.82 | 0.80% | 487,557 |
| Mar 20, 2026 | 8.54 | 8.76 | 8.44 | 8.75 | 8.75 | 2.46% | 1,401,607 |
| Mar 19, 2026 | 8.54 | 8.63 | 8.38 | 8.54 | 8.54 | -0.58% | 467,774 |
| Mar 18, 2026 | 8.94 | 8.95 | 8.53 | 8.59 | 8.59 | -4.56% | 495,892 |
| Mar 17, 2026 | 9.10 | 9.20 | 8.96 | 9.00 | 9.00 | -1.85% | 467,125 |
| Mar 16, 2026 | 9.27 | 9.32 | 9.06 | 9.17 | 9.17 | -0.43% | 511,792 |
| Mar 13, 2026 | 9.40 | 9.54 | 9.00 | 9.21 | 9.21 | -1.07% | 584,493 |
| Mar 12, 2026 | 9.48 | 9.48 | 9.09 | 9.31 | 9.31 | -2.82% | 737,000 |
| Mar 11, 2026 | 9.70 | 9.84 | 9.26 | 9.58 | 9.58 | -1.94% | 701,241 |
| Mar 10, 2026 | 10.21 | 10.27 | 9.68 | 9.77 | 9.77 | -0.41% | 628,373 |
| Mar 9, 2026 | 9.27 | 9.95 | 9.22 | 9.81 | 9.81 | 2.29% | 626,457 |
| Mar 6, 2026 | 9.24 | 9.64 | 9.24 | 9.59 | 9.59 | 1.37% | 651,790 |
| Mar 5, 2026 | 9.70 | 10.06 | 9.36 | 9.46 | 9.46 | -4.06% | 509,804 |
| Mar 4, 2026 | 9.36 | 9.96 | 9.36 | 9.86 | 9.86 | 5.34% | 543,331 |
| Mar 3, 2026 | 9.09 | 9.62 | 8.95 | 9.36 | 9.36 | -0.43% | 553,435 |
| Mar 2, 2026 | 9.09 | 9.62 | 8.97 | 9.40 | 9.40 | 8.42% | 811,088 |
| Feb 27, 2026 | 8.53 | 8.79 | 8.48 | 8.67 | 8.67 | 0.35% | 439,378 |
| Feb 26, 2026 | 8.88 | 8.96 | 8.63 | 8.64 | 8.64 | -2.70% | 355,723 |
| Feb 25, 2026 | 9.00 | 9.11 | 8.53 | 8.88 | 8.88 | -1.00% | 490,497 |
| Feb 24, 2026 | 9.03 | 9.30 | 8.75 | 8.97 | 8.97 | -1.10% | 448,814 |
| Feb 23, 2026 | 9.00 | 9.34 | 8.81 | 9.07 | 9.07 | 0.55% | 465,762 |
| Feb 20, 2026 | 9.38 | 9.59 | 8.20 | 9.02 | 9.02 | -0.11% | 786,420 |
| Feb 19, 2026 | 9.06 | 9.20 | 8.80 | 9.03 | 9.03 | -0.66% | 349,728 |
| Feb 18, 2026 | 8.81 | 9.23 | 8.81 | 9.09 | 9.09 | 1.45% | 307,596 |
| Feb 17, 2026 | 8.96 | 9.21 | 8.80 | 8.96 | 8.96 | - | 374,772 |
| Feb 13, 2026 | 8.85 | 9.24 | 8.85 | 8.96 | 8.96 | 1.24% | 308,607 |
| Feb 12, 2026 | 8.93 | 9.04 | 8.72 | 8.85 | 8.85 | -0.90% | 351,722 |
| Feb 11, 2026 | 9.01 | 9.09 | 8.65 | 8.93 | 8.93 | -0.33% | 271,115 |
| Feb 10, 2026 | 8.81 | 9.12 | 8.77 | 8.96 | 8.96 | 1.13% | 329,528 |
| Feb 9, 2026 | 8.90 | 9.04 | 8.59 | 8.86 | 8.86 | -0.56% | 356,096 |