Prothena Corporation Stock Price History

Historical Data

Date	Open	High	Low	Close	Adj. Close	Change	Volume
Dec 18, 2025	9.45	9.68	9.45	9.50	9.50	-2.17%	173
Dec 17, 2025	9.75	9.75	9.69	9.71	9.71	2.23%	321
Dec 16, 2025	9.84	9.84	9.50	9.50	9.50	-5.57%	2,336
Dec 15, 2025	10.37	10.49	9.99	10.06	10.06	-2.76%	2,409
Dec 12, 2025	10.46	10.49	10.26	10.35	10.35	0.54%	70
Dec 11, 2025	9.71	10.42	9.71	10.29	10.29	1.58%	932
Dec 10, 2025	10.49	10.49	9.72	10.13	10.13	-4.16%	1,396
Dec 9, 2025	10.65	11.04	10.48	10.57	10.57	-2.85%	1,223
Dec 8, 2025	11.20	11.20	10.88	10.88	10.88	-1.81%	206
Dec 5, 2025	11.05	11.38	11.05	11.08	11.08	-2.28%	340
Dec 4, 2025	11.04	11.54	11.04	11.34	11.34	-0.11%	1,402
Dec 3, 2025	10.57	11.39	10.54	11.35	11.35	10.07%	986
Dec 2, 2025	10.53	10.54	10.29	10.31	10.31	-1.32%	2,063
Dec 1, 2025	10.97	11.12	10.44	10.45	10.45	-2.88%	3,938
Nov 28, 2025	10.27	10.80	10.27	10.76	10.76	3.24%	552
Nov 26, 2025	10.48	10.62	10.42	10.42	10.42	-1.52%	115
Nov 25, 2025	10.50	10.58	10.47	10.58	10.58	1.02%	1,219
Nov 24, 2025	10.55	10.74	10.45	10.48	10.48	0.06%	369
Nov 21, 2025	9.99	10.47	9.91	10.47	10.47	4.57%	547
Nov 20, 2025	10.12	10.35	10.01	10.01	10.01	-1.07%	512
Nov 19, 2025	10.38	10.38	10.08	10.12	10.12	-1.65%	630
Nov 18, 2025	10.18	10.29	9.87	10.29	10.29	0.96%	2,155
Nov 17, 2025	9.94	10.23	9.94	10.19	10.19	0.71%	1,308
Nov 14, 2025	10.04	10.25	10.04	10.12	10.12	-1.56%	210
Nov 13, 2025	10.83	10.83	10.28	10.28	10.28	-4.56%	175
Nov 12, 2025	10.36	10.81	10.18	10.77	10.77	0.57%	1,147
Nov 11, 2025	10.50	10.71	10.39	10.71	10.71	-1.11%	278
Nov 10, 2025	10.99	11.03	10.76	10.83	10.83	7.72%	2,790
Nov 7, 2025	10.49	10.76	9.73	10.05	10.05	-3.05%	2,404
Nov 6, 2025	10.27	10.40	10.27	10.37	10.37	0.91%	482
Nov 5, 2025	10.29	10.29	10.07	10.28	10.28	0.55%	304
Nov 4, 2025	10.34	10.52	10.20	10.22	10.22	-6.03%	1,121
Nov 3, 2025	11.00	11.15	10.70	10.88	10.88	3.04%	353
Oct 31, 2025	10.40	10.72	10.40	10.56	10.56	0.29%	363
Oct 30, 2025	10.71	10.76	10.35	10.53	10.53	-0.89%	329
Oct 29, 2025	10.76	10.76	10.50	10.62	10.62	-0.75%	370
Oct 28, 2025	10.73	11.67	10.70	10.70	10.70	3.56%	15,086
Oct 27, 2025	9.98	10.36	9.92	10.33	10.33	4.57%	856
Oct 24, 2025	9.80	9.97	9.68	9.88	9.88	-0.58%	154
Oct 23, 2025	9.88	10.01	9.78	9.94	9.94	1.06%	212
Oct 22, 2025	10.22	10.33	9.72	9.83	9.83	-4.38%	201
Oct 21, 2025	10.37	10.42	10.28	10.28	10.28	-1.49%	157
Oct 20, 2025	10.14	10.44	10.04	10.44	10.44	6.98%	1,045
Oct 17, 2025	9.99	10.30	9.63	9.76	9.76	-7.50%	624
Oct 16, 2025	10.76	10.81	10.55	10.55	10.55	1.07%	1,468
Oct 15, 2025	10.12	10.53	10.12	10.44	10.44	2.53%	777
Oct 14, 2025	10.32	10.32	10.07	10.18	10.18	0.64%	349
Oct 13, 2025	10.03	10.24	10.03	10.12	10.12	0.21%	432
Oct 10, 2025	10.34	10.49	10.04	10.09	10.09	-3.48%	1,157
Oct 9, 2025	10.43	10.63	10.41	10.46	10.46	0.44%	598