5 DAY PERFORMANCE
+19.05%
1 MONTH PERFORMANCE
+3.81%
3 MONTH PERFORMANCE
+9.85%
6 MONTH PERFORMANCE
+12.11%
YEAR-TO-DATE PERFORMANCE
+2.72%
1 YEAR PERFORMANCE
+21.56%
Prothena Corporation plc Stock Chart
Share Price History
| Date | Opening Price | Closing Price | High | Low | Volume | Market Capitalization |
|---|---|---|---|---|---|---|
| 09/21/2026 | $8.59 | $8.51 (-0.93%) | $8.80 | $8.46 | 361.90 K | $443.75 M |
| 09/18/2026 | $8.41 | $8.58 (2.02%) | $8.60 | $8.25 | 1.83 M | $447.40 M |
| 09/17/2026 | $8.39 | $8.46 (0.83%) | $8.56 | $8.23 | 404.80 K | $441.15 M |
| 09/16/2026 | $8.35 | $8.24 (-1.32%) | $8.50 | $8.20 | 398.34 K | $429.67 M |
| 09/15/2026 | $8.86 | $8.33 (-5.98%) | $8.86 | $8.30 | 323.44 K | $434.37 M |
| 09/14/2026 | $8.95 | $8.86 (-1.01%) | $8.99 | $8.79 | 374.90 K | $462.00 M |
| 09/11/2026 | $9.06 | $8.93 (-1.43%) | $9.14 | $8.77 | 376.30 K | $465.65 M |
| 09/10/2026 | $9.25 | $9.02 (-2.49%) | $9.26 | $8.97 | 310.91 K | $470.35 M |
| 09/09/2026 | $9.40 | $9.30 (-1.06%) | $9.50 | $9.22 | 294.60 K | $484.95 M |
| 09/08/2026 | $9.60 | $9.54 (-0.63%) | $9.67 | $9.35 | 305.44 K | $497.46 M |
| 09/04/2026 | $9.50 | $9.82 (3.37%) | $9.87 | $9.48 | 383.93 K | $512.06 M |
| 09/03/2026 | $9.77 | $9.60 (-1.74%) | $9.78 | $9.51 | 277.06 K | $500.59 M |
| 09/02/2026 | $9.64 | $9.69 (0.52%) | $9.75 | $9.37 | 341.10 K | $505.29 M |
| 09/01/2026 | $9.28 | $9.61 (3.56%) | $9.63 | $9.26 | 267.70 K | $501.11 M |
| 08/31/2026 | $9.26 | $9.35 (0.97%) | $9.40 | $9.10 | 335.15 K | $487.56 M |
| 08/28/2026 | $9.02 | $9.33 (3.44%) | $9.48 | $8.95 | 498.12 K | $486.51 M |
| 08/27/2026 | $9.16 | $9.09 (-0.76%) | $9.24 | $8.95 | 338.92 K | $474.00 M |
| 08/26/2026 | $9.40 | $9.25 (-1.6%) | $9.40 | $9.15 | 289.04 K | $482.34 M |
| 08/25/2026 | $9.51 | $9.42 (-0.95%) | $9.82 | $9.42 | 363.71 K | $491.21 M |
| 08/24/2026 | $9.46 | $9.39 (-0.74%) | $9.49 | $9.19 | 248.12 K | $489.64 M |
| 08/21/2026 | $9.11 | $9.45 (3.73%) | $9.52 | $9.09 | 376.04 K | $492.77 M |
| 08/20/2026 | $9.13 | $9.03 (-1.1%) | $9.15 | $8.71 | 346.00 K | $470.87 M |
| 08/19/2026 | $8.91 | $9.29 (4.26%) | $9.34 | $8.91 | 385.54 K | $484.43 M |
| 08/18/2026 | $8.88 | $8.71 (-1.91%) | $9.00 | $8.58 | 248.60 K | $454.18 M |
| 08/17/2026 | $8.84 | $8.88 (0.45%) | $9.07 | $8.73 | 365.92 K | $463.05 M |
| 08/14/2026 | $9.04 | $8.86 (-1.99%) | $9.15 | $8.84 | 312.60 K | $462.00 M |
| 08/13/2026 | $9.30 | $9.08 (-2.37%) | $9.37 | $9.04 | 343.10 K | $473.48 M |
| 08/12/2026 | $9.22 | $9.26 (0.43%) | $9.31 | $9.09 | 274.93 K | $482.86 M |
| 08/11/2026 | $9.12 | $9.22 (1.1%) | $9.29 | $8.86 | 475.30 K | $480.78 M |
| 08/10/2026 | $8.76 | $9.12 (4.11%) | $9.17 | $8.53 | 713.70 K | $475.56 M |
| 08/07/2026 | $8.54 | $8.76 (2.58%) | $8.85 | $8.04 | 481.90 K | $456.79 M |
| 08/06/2026 | $8.50 | $8.58 (0.94%) | $8.77 | $8.33 | 418.69 K | $447.40 M |
| 08/05/2026 | $8.49 | $8.49 (0%) | $8.74 | $8.40 | 489.50 K | $442.71 M |
| 08/04/2026 | $8.33 | $8.49 (1.92%) | $8.58 | $8.33 | 329.91 K | $442.71 M |
| 08/03/2026 | $8.17 | $8.33 (1.96%) | $8.38 | $8.04 | 566.00 K | $434.37 M |
| 07/31/2026 | $8.41 | $8.12 (-3.45%) | $8.51 | $8.00 | 545.50 K | $436.11 M |
| 07/30/2026 | $8.50 | $8.41 (-1.06%) | $8.56 | $8.26 | 502.23 K | $451.68 M |
| 07/29/2026 | $8.45 | $8.56 (1.3%) | $8.68 | $8.39 | 646.16 K | $459.74 M |
| 07/28/2026 | $8.70 | $8.56 (-1.61%) | $8.78 | $8.36 | 802.26 K | $459.74 M |
| 07/27/2026 | $8.88 | $8.70 (-2.03%) | $9.13 | $8.66 | 704.71 K | $467.26 M |
| 07/24/2026 | $8.54 | $8.75 (2.46%) | $8.82 | $8.35 | 576.84 K | $469.95 M |
| 07/23/2026 | $8.27 | $8.53 (3.14%) | $8.63 | $8.23 | 532.21 K | $458.13 M |
| 07/22/2026 | $8.69 | $8.44 (-2.88%) | $8.79 | $8.43 | 542.55 K | $453.30 M |
| 07/21/2026 | $8.72 | $8.75 (0.34%) | $8.81 | $8.51 | 647.64 K | $469.95 M |
| 07/20/2026 | $8.66 | $8.67 (0.12%) | $8.85 | $8.55 | 549.63 K | $465.65 M |
| 07/17/2026 | $8.40 | $8.66 (3.1%) | $8.80 | $8.28 | 408.40 K | $465.11 M |
| 07/16/2026 | $8.40 | $8.47 (0.83%) | $8.66 | $8.07 | 659.70 K | $454.91 M |
| 07/15/2026 | $8.58 | $8.43 (-1.75%) | $8.63 | $8.42 | 504.70 K | $452.76 M |
| 07/14/2026 | $8.77 | $8.64 (-1.48%) | $8.88 | $8.61 | 530.32 K | $464.04 M |
| 07/13/2026 | $9.17 | $8.83 (-3.71%) | $9.19 | $8.76 | 781.73 K | $474.24 M |
| 07/10/2026 | $9.64 | $9.24 (-4.15%) | $9.82 | $9.03 | 505.13 K | $496.26 M |
| 07/09/2026 | $9.83 | $9.64 (-1.93%) | $10.02 | $9.55 | 482.23 K | $517.75 M |
| 07/08/2026 | $9.66 | $9.85 (1.97%) | $9.86 | $9.56 | 444.25 K | $529.02 M |
| 07/07/2026 | $9.62 | $9.68 (0.62%) | $9.78 | $9.33 | 520.54 K | $519.89 M |
| 07/06/2026 | $9.65 | $9.50 (-1.55%) | $9.84 | $9.47 | 403.74 K | $510.23 M |
| 07/02/2026 | $9.61 | $9.69 (0.83%) | $10.15 | $9.57 | 462.90 K | $520.43 M |
| 07/01/2026 | $9.74 | $9.58 (-1.64%) | $10.00 | $9.47 | 436.70 K | $514.52 M |
| 06/30/2026 | $9.96 | $9.79 (-1.71%) | $10.04 | $9.75 | 339.64 K | $525.80 M |
| 06/29/2026 | $10.00 | $9.97 (-0.3%) | $10.12 | $9.78 | 420.30 K | $535.47 M |
| 06/26/2026 | $9.32 | $10.02 (7.51%) | $10.09 | $9.28 | 1.91 M | $538.15 M |
| 06/25/2026 | $9.42 | $9.27 (-1.59%) | $9.58 | $9.19 | 964.90 K | $497.87 M |
| 06/24/2026 | $9.57 | $9.40 (-1.78%) | $9.87 | $9.26 | 477.91 K | $504.86 M |
| 06/23/2026 | $9.12 | $9.55 (4.71%) | $9.77 | $9.12 | 458.04 K | $512.91 M |
| 06/22/2026 | $8.90 | $9.15 (2.81%) | $9.27 | $8.89 | 612.54 K | $491.43 M |
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