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Prothena Corporation plc (PRTA)
NASDAQ: PRTA · Real-Time Price · USD
11.51
+0.72 (6.67%)
At close: Apr 28, 2026, 4:00 PM EDT
11.49
-0.02 (-0.17%)
After-hours: Apr 28, 2026, 5:01 PM EDT

Prothena Corporation Stock Price History

Historical Data

DateOpenHighLowCloseAdj. CloseChangeVolume
Apr 28, 202610.8411.5710.8311.5111.516.67%439,880
Apr 27, 202610.7111.1210.7110.7910.790.37%314,011
Apr 24, 202610.6510.8210.4010.7510.750.19%287,924
Apr 23, 202610.6911.0710.6010.7310.730.09%474,683
Apr 22, 202610.6910.8510.6110.7210.720.47%350,784
Apr 21, 202610.7810.7810.4810.6710.67-1.11%451,019
Apr 20, 202610.8210.9710.7710.7910.79-1.01%318,913
Apr 17, 202610.7110.9910.7010.9010.903.61%466,143
Apr 16, 202610.7810.8510.4510.5210.52-2.77%287,472
Apr 15, 202610.6210.8710.5110.8210.821.98%382,958
Apr 14, 202610.3410.6710.3410.6110.612.91%370,555
Apr 13, 202610.4910.5510.1810.3110.31-1.81%334,062
Apr 10, 202610.6010.6010.3710.5010.50-0.76%313,798
Apr 9, 202610.4710.7010.3810.5810.58-0.66%414,710
Apr 8, 202610.4810.6810.2910.6510.652.80%454,445
Apr 7, 20269.9810.379.8010.3610.363.19%481,344
Apr 6, 20269.9110.119.8810.0410.041.83%410,502
Apr 2, 20269.7510.089.519.869.86-1.69%848,822
Apr 1, 20269.8410.129.8010.0310.033.19%593,287
Mar 31, 20269.339.869.339.729.725.08%671,532
Mar 30, 20269.249.509.119.259.25-0.11%416,146
Mar 27, 20269.429.629.149.269.26-2.73%430,062
Mar 26, 20269.199.689.169.529.522.26%452,666
Mar 25, 20268.849.328.829.319.316.64%543,662
Mar 24, 20268.758.968.498.738.73-1.02%534,726
Mar 23, 20268.839.048.768.828.820.80%487,557
Mar 20, 20268.548.768.448.758.752.46%1,401,607
Mar 19, 20268.548.638.388.548.54-0.58%467,774
Mar 18, 20268.948.958.538.598.59-4.56%495,892
Mar 17, 20269.109.208.969.009.00-1.85%467,125
Mar 16, 20269.279.329.069.179.17-0.43%511,792
Mar 13, 20269.409.549.009.219.21-1.07%584,493
Mar 12, 20269.489.489.099.319.31-2.82%737,000
Mar 11, 20269.709.849.269.589.58-1.94%701,241
Mar 10, 202610.2110.279.689.779.77-0.41%628,373
Mar 9, 20269.279.959.229.819.812.29%626,457
Mar 6, 20269.249.649.249.599.591.37%651,790
Mar 5, 20269.7010.069.369.469.46-4.06%509,804
Mar 4, 20269.369.969.369.869.865.34%543,331
Mar 3, 20269.099.628.959.369.36-0.43%553,435
Mar 2, 20269.099.628.979.409.408.42%811,088
Feb 27, 20268.538.798.488.678.670.35%439,378
Feb 26, 20268.888.968.638.648.64-2.70%355,723
Feb 25, 20269.009.118.538.888.88-1.00%490,497
Feb 24, 20269.039.308.758.978.97-1.10%448,814
Feb 23, 20269.009.348.819.079.070.55%465,762
Feb 20, 20269.389.598.209.029.02-0.11%786,420
Feb 19, 20269.069.208.809.039.03-0.66%349,728
Feb 18, 20268.819.238.819.099.091.45%307,596
Feb 17, 20268.969.218.808.968.96-374,772
Feb 13, 20268.859.248.858.968.961.24%308,607
Feb 12, 20268.939.048.728.858.85-0.90%351,722
Feb 11, 20269.019.098.658.938.93-0.33%271,115
Feb 10, 20268.819.128.778.968.961.13%329,528
Feb 9, 20268.909.048.598.868.86-0.56%356,096
Feb 6, 20268.588.998.568.918.916.71%581,028
Feb 5, 20268.869.058.238.358.35-6.07%518,973
Feb 4, 20268.779.048.488.898.891.25%451,843
Feb 3, 20268.909.058.618.788.78-1.46%280,865
Feb 2, 20268.798.958.398.918.911.14%556,687
Jan 30, 20268.989.078.658.818.81-2.76%389,955
Jan 29, 20269.159.508.959.069.06-0.88%362,299
Jan 28, 20269.699.789.109.149.14-6.06%422,156
Jan 27, 20269.9210.099.689.739.73-2.11%393,146
Jan 26, 20269.9410.269.779.949.94-0.60%470,290
Jan 23, 202610.3010.539.9910.0010.00-3.29%659,527
Jan 22, 20269.6810.359.6710.3410.346.82%512,688
Jan 21, 20269.289.729.249.689.684.65%591,450
Jan 20, 20269.129.559.009.259.25-1.07%630,858
Jan 16, 20269.299.458.949.359.350.97%761,486
Jan 15, 20269.169.288.919.269.260.65%601,967
Jan 14, 20268.949.268.849.209.202.45%398,465
Jan 13, 20268.779.068.778.988.980.79%470,366
Jan 12, 20269.169.168.658.918.91-3.05%585,586
Jan 9, 20269.199.349.119.199.191.55%401,921
Jan 8, 20269.039.168.959.059.05-0.88%376,004
Jan 7, 20269.009.478.969.139.131.78%468,687
Jan 6, 20269.019.148.898.978.97-1.43%636,414
Jan 5, 20269.249.248.929.109.10-1.09%539,121
Jan 2, 20269.569.699.079.209.20-3.66%526,924
Dec 31, 20259.309.569.249.559.552.58%475,140
Dec 30, 20259.459.529.299.319.31-1.79%363,451
Dec 29, 20259.499.559.349.489.48-0.63%495,901
Dec 26, 20259.679.679.439.549.54-1.55%424,645
Dec 24, 20259.469.749.239.699.692.11%237,356
Dec 23, 20259.539.599.299.499.49-1.96%703,352
Dec 22, 20259.169.789.079.689.685.10%688,017
Dec 19, 20259.389.569.119.219.21-1.81%4,129,698
Dec 18, 20259.469.679.329.389.38-0.53%547,631
Dec 17, 20259.789.919.399.439.43-3.28%508,027
Dec 16, 20259.9510.169.529.759.75-2.21%638,928
Dec 15, 202510.3710.509.949.979.97-3.76%852,645
Dec 12, 202510.4010.4910.2010.3610.360.29%477,695
Dec 11, 20259.9310.509.8110.3310.334.66%693,399
Dec 10, 202510.2810.329.699.879.87-4.36%961,391
Dec 9, 202510.7010.8010.2310.3210.32-3.82%532,153
Dec 8, 202511.2011.3010.7110.7310.73-3.07%561,870
Dec 5, 202511.1811.4810.9811.0711.07-0.81%434,696
Dec 4, 202511.0411.5710.9511.1611.16-0.09%1,161,191
Dec 3, 202510.4011.4810.3111.1711.177.92%777,465