Prothena Corporation plc - PRTA - Stock Historical Data & Price

Date Range:

Date	Open	Close	Adj Close	High	Low	Volume
February 20, 2026	9.38	9.02	9.02	9.59	8.2	786,420
February 19, 2026	9.06	9.03	9.03	9.2	8.8	349,728
February 18, 2026	8.81	9.09	9.09	9.23	8.81	307,600
February 17, 2026	8.96	8.96	8.96	9.21	8.8	374,800
February 13, 2026	8.85	8.96	8.96	9.24	8.85	308,607
February 12, 2026	8.93	8.85	8.85	9.04	8.72	351,722
February 11, 2026	9.01	8.93	8.93	9.09	8.65	271,115
February 10, 2026	8.81	8.96	8.96	9.12	8.77	329,528
February 09, 2026	8.9	8.86	8.86	9.04	8.59	356,100
February 06, 2026	8.58	8.91	8.91	8.99	8.56	581,028
February 05, 2026	8.86	8.35	8.35	9.05	8.23	518,973
February 04, 2026	8.77	8.89	8.89	9.04	8.48	451,843
February 03, 2026	8.9	8.78	8.78	9.05	8.61	269,958
February 02, 2026	8.79	8.91	8.91	8.95	8.39	556,700
January 30, 2026	8.98	8.81	8.81	9.07	8.65	390,000
January 29, 2026	9.15	9.06	9.06	9.5	8.95	362,300
January 28, 2026	9.69	9.14	9.14	9.78	9.1	422,200
January 27, 2026	9.92	9.73	9.73	10.09	9.68	393,146
January 26, 2026	9.94	9.94	9.94	10.26	9.77	470,300
January 23, 2026	10.3	10	10	10.53	9.99	659,527
January 22, 2026	9.68	10.34	10.34	10.35	9.66	512,700
January 21, 2026	9.28	9.68	9.68	9.72	9.24	591,450
January 20, 2026	9.12	9.25	9.25	9.55	9	630,858
January 16, 2026	9.29	9.35	9.35	9.45	8.94	761,500
January 15, 2026	9.16	9.26	9.26	9.28	8.91	602,000
January 14, 2026	8.94	9.2	9.2	9.26	8.84	398,500
January 13, 2026	8.77	8.98	8.98	9.06	8.77	470,400
January 12, 2026	9.16	8.91	8.91	9.16	8.65	585,600
January 09, 2026	9.19	9.19	9.19	9.34	9.11	401,921
January 08, 2026	9.03	9.05	9.05	9.16	8.95	376,004
January 07, 2026	9	9.13	9.13	9.47	8.96	453,518
January 06, 2026	9.01	8.97	8.97	9.14	8.89	636,414
January 05, 2026	9.24	9.1	9.1	9.24	8.92	539,121
January 02, 2026	9.56	9.2	9.2	9.69	9.07	509,980
December 31, 2025	9.3	9.55	9.55	9.56	9.24	475,140
December 30, 2025	9.45	9.31	9.31	9.52	9.29	363,500
December 29, 2025	9.49	9.48	9.48	9.55	9.34	495,901
December 26, 2025	9.67	9.54	9.54	9.67	9.43	424,645
December 24, 2025	9.46	9.69	9.69	9.74	9.23	237,400
December 23, 2025	9.53	9.49	9.49	9.59	9.29	703,400
December 22, 2025	9.16	9.68	9.68	9.78	9.07	688,017
December 19, 2025	9.38	9.21	9.21	9.56	9.11	4.13M
December 18, 2025	9.46	9.38	9.38	9.67	9.32	547,631
December 17, 2025	9.78	9.43	9.43	9.91	9.39	508,027
December 16, 2025	9.95	9.75	9.75	10.16	9.52	638,928
December 15, 2025	10.37	9.97	9.97	10.5	9.94	852,645
December 12, 2025	10.4	10.36	10.36	10.49	10.2	477,695
December 11, 2025	9.93	10.33	10.33	10.5	9.81	693,400
December 10, 2025	10.28	9.87	9.87	10.32	9.69	961,400
December 09, 2025	10.7	10.32	10.32	10.8	10.23	532,200
December 08, 2025	11.2	10.73	10.73	11.3	10.71	561,900
December 05, 2025	11.18	11.07	11.07	11.48	10.98	434,700
December 04, 2025	11.04	11.16	11.19	11.57	10.95	1.13M
December 03, 2025	10.4	11.17	11.17	11.48	10.31	777,500
December 02, 2025	10.29	10.35	10.35	10.53	10.14	615,124
December 01, 2025	10.98	10.27	10.27	11.13	10.22	648,509
November 28, 2025	10.52	10.75	10.75	10.83	10.46	288,728
November 26, 2025	10.48	10.43	10.43	10.59	10.37	451,420
November 25, 2025	10.5	10.5	10.5	10.62	10.3	515,600
November 24, 2025	10.55	10.4	10.4	10.91	10.29	776,169

Prothena Corporation plc (PRTA) NASDAQ