Prothena Corporation Stock Price History

Historical Data

Date	Open	High	Low	Close	Adj. Close	Change	Volume
May 12, 2026	9.67	9.82	9.66	9.57	-	-1.03%	52,063
May 11, 2026	10.79	10.88	9.46	9.67	9.67	-9.88%	843,782
May 8, 2026	11.00	11.80	10.62	10.73	10.73	2.00%	793,495
May 7, 2026	11.10	11.21	10.40	10.52	10.52	-5.90%	443,068
May 6, 2026	11.19	11.30	11.02	11.18	11.18	-0.09%	333,877
May 5, 2026	10.89	11.25	10.89	11.19	11.19	3.71%	306,816
May 4, 2026	10.58	11.00	10.55	10.79	10.79	1.41%	592,359
May 1, 2026	11.04	11.14	10.64	10.64	10.64	-3.80%	516,354
Apr 30, 2026	10.89	11.12	10.84	11.06	11.06	1.75%	319,520
Apr 29, 2026	11.46	11.46	10.74	10.87	10.87	-5.56%	397,881
Apr 28, 2026	10.84	11.57	10.83	11.51	11.51	6.67%	439,891
Apr 27, 2026	10.71	11.12	10.71	10.79	10.79	0.37%	314,337
Apr 24, 2026	10.65	10.82	10.40	10.75	10.75	0.19%	287,930
Apr 23, 2026	10.69	11.07	10.60	10.73	10.73	0.09%	474,683
Apr 22, 2026	10.69	10.85	10.61	10.72	10.72	0.47%	350,784
Apr 21, 2026	10.78	10.78	10.48	10.67	10.67	-1.11%	451,072
Apr 20, 2026	10.82	10.97	10.77	10.79	10.79	-1.01%	333,298
Apr 17, 2026	10.71	10.99	10.70	10.90	10.90	3.61%	486,483
Apr 16, 2026	10.78	10.85	10.45	10.52	10.52	-2.77%	298,913
Apr 15, 2026	10.62	10.87	10.51	10.82	10.82	1.98%	409,927
Apr 14, 2026	10.34	10.67	10.34	10.61	10.61	2.91%	370,945
Apr 13, 2026	10.49	10.55	10.18	10.31	10.31	-1.81%	334,063
Apr 10, 2026	10.60	10.60	10.37	10.50	10.50	-0.76%	319,034
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%	454,454
Apr 7, 2026	9.98	10.37	9.80	10.36	10.36	3.19%	481,374
Apr 6, 2026	9.91	10.11	9.88	10.04	10.04	1.83%	412,513
Apr 2, 2026	9.75	10.08	9.51	9.86	9.86	-1.69%	849,122
Apr 1, 2026	9.84	10.12	9.80	10.03	10.03	3.19%	593,297
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%	416,193
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%	452,736
Mar 25, 2026	8.84	9.32	8.82	9.31	9.31	6.64%	543,667
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