PRTRX Stock Price History

Historical Data

Date	Open	High	Low	Close	Adj. Close	Change
May 22, 2026	16.27	16.27	16.27	16.27	16.27	0.31%
May 21, 2026	16.22	16.22	16.22	16.22	16.22	0.31%
May 20, 2026	16.17	16.17	16.17	16.17	16.17	1.25%
May 19, 2026	15.97	15.97	15.97	15.97	15.97	-0.75%
May 18, 2026	16.09	16.09	16.09	16.09	16.09	0.06%
May 15, 2026	16.08	16.08	16.08	16.08	16.08	-1.41%
May 14, 2026	16.31	16.31	16.31	16.31	16.31	0.55%
May 13, 2026	16.22	16.22	16.22	16.22	16.22	0.56%
May 12, 2026	16.13	16.13	16.13	16.13	16.13	-0.31%
May 11, 2026	16.18	16.18	16.18	16.18	16.18	0.12%
May 8, 2026	16.16	16.16	16.16	16.16	16.16	0.50%
May 7, 2026	16.08	16.08	16.08	16.08	16.08	-0.56%
May 6, 2026	16.17	16.17	16.17	16.17	16.17	1.44%
May 5, 2026	15.94	15.94	15.94	15.94	15.94	0.89%
May 4, 2026	15.80	15.80	15.80	15.80	15.80	-0.38%
May 1, 2026	15.86	15.86	15.86	15.86	15.86	0.06%
Apr 30, 2026	15.85	15.85	15.85	15.85	15.85	1.15%
Apr 29, 2026	15.67	15.67	15.67	15.67	15.67	-0.25%
Apr 28, 2026	15.71	15.71	15.71	15.71	15.71	-0.44%
Apr 27, 2026	15.78	15.78	15.78	15.78	15.78	-0.06%
Apr 24, 2026	15.79	15.79	15.79	15.79	15.79	0.64%
Apr 23, 2026	15.69	15.69	15.69	15.69	15.69	-0.57%
Apr 22, 2026	15.78	15.78	15.78	15.78	15.78	0.83%
Apr 21, 2026	15.65	15.65	15.65	15.65	15.65	-0.82%
Apr 20, 2026	15.78	15.78	15.78	15.78	15.78	-0.25%
Apr 17, 2026	15.82	15.82	15.82	15.82	15.82	1.09%
Apr 16, 2026	15.65	15.65	15.65	15.65	15.65	-
Apr 15, 2026	15.65	15.65	15.65	15.65	15.65	0.51%
Apr 14, 2026	15.57	15.57	15.57	15.57	15.57	1.04%
Apr 13, 2026	15.41	15.41	15.41	15.41	15.41	0.85%
Apr 10, 2026	15.28	15.28	15.28	15.28	15.28	-0.07%
Apr 9, 2026	15.29	15.29	15.29	15.29	15.29	0.46%
Apr 8, 2026	15.22	15.22	15.22	15.22	15.22	2.77%
Apr 7, 2026	14.81	14.81	14.81	14.81	14.81	-
Apr 6, 2026	14.81	14.81	14.81	14.81	14.81	0.41%
Apr 2, 2026	14.75	14.75	14.75	14.75	14.75	-0.07%
Apr 1, 2026	14.76	14.76	14.76	14.76	14.76	0.89%
Mar 31, 2026	14.63	14.63	14.63	14.63	14.63	2.74%
Mar 30, 2026	14.24	14.24	14.24	14.24	14.24	-0.28%
Mar 27, 2026	14.28	14.28	14.28	14.28	14.28	-1.38%
Mar 26, 2026	14.48	14.48	14.48	14.48	14.48	-1.76%
Mar 25, 2026	14.74	14.74	14.74	14.74	14.74	0.75%
Mar 24, 2026	14.63	14.63	14.63	14.63	14.63	-0.14%
Mar 23, 2026	14.65	14.65	14.65	14.65	14.65	1.31%
Mar 20, 2026	14.46	14.46	14.46	14.46	14.46	-1.70%
Mar 19, 2026	14.71	14.71	14.71	14.71	14.71	-0.20%
Mar 18, 2026	14.74	14.74	14.74	14.74	14.74	-1.14%
Mar 17, 2026	14.91	14.91	14.91	14.91	14.91	0.34%
Mar 16, 2026	14.86	14.86	14.86	14.86	14.86	1.09%
Mar 13, 2026	14.70	14.70	14.70	14.70	14.70	-0.61%