Protagonist Therapeutics, Inc. (PTGX)

NASDAQ: PTGX · Real-Time Price · USD

121.88

-0.75 (-0.61%)

At close: Jun 26, 2026, 4:00 PM EDT

116.88

-5.00 (-4.10%)

After-hours: Jun 26, 2026, 6:03 PM EDT

Protagonist Therapeutics Stock Price History

Historical Data

Date	Open	High	Low	Close	Adj. Close	Change	Volume
Jun 26, 2026	122.00	123.43	118.31	121.88	121.88	-0.61%	2,545,028
Jun 25, 2026	122.31	126.25	121.48	122.63	122.63	0.39%	1,037,823
Jun 24, 2026	119.38	124.80	118.81	122.15	122.15	2.68%	1,122,424
Jun 23, 2026	114.66	119.85	114.56	118.96	118.96	3.42%	659,283
Jun 22, 2026	113.24	116.57	113.24	115.03	115.03	1.92%	1,193,423
Jun 18, 2026	112.88	114.49	111.17	112.86	112.86	1.27%	1,533,652
Jun 17, 2026	110.84	113.47	110.11	111.44	111.44	0.72%	742,534
Jun 16, 2026	112.83	113.66	108.53	110.64	110.64	-1.62%	504,794
Jun 15, 2026	109.10	112.77	109.10	112.46	112.46	2.44%	536,301
Jun 12, 2026	109.85	111.78	109.60	109.78	109.78	-0.01%	448,850
Jun 11, 2026	106.28	110.82	106.28	109.79	109.79	3.80%	564,250
Jun 10, 2026	105.50	111.45	104.89	105.77	105.77	-0.09%	770,494
Jun 9, 2026	99.76	106.48	98.08	105.87	105.87	8.00%	878,601
Jun 8, 2026	98.95	101.16	96.70	98.03	98.03	0.67%	567,714
Jun 5, 2026	103.14	103.29	96.38	97.38	97.38	-5.26%	887,396
Jun 4, 2026	96.39	103.55	96.14	102.79	102.79	7.74%	658,834
Jun 3, 2026	93.93	95.61	93.00	95.41	95.41	2.34%	579,220
Jun 2, 2026	93.84	97.71	92.75	93.23	93.23	-1.78%	723,588
Jun 1, 2026	97.88	98.50	93.50	94.92	94.92	-4.66%	817,044
May 29, 2026	100.64	102.40	98.84	99.56	99.56	-0.85%	597,778
May 28, 2026	102.74	103.71	99.43	100.41	100.41	-1.76%	551,512
May 27, 2026	100.05	102.49	98.94	102.21	102.21	2.23%	404,793
May 26, 2026	100.03	100.80	97.93	99.98	99.98	0.80%	360,762
May 22, 2026	102.01	102.42	98.89	99.19	99.19	-2.76%	393,915
May 21, 2026	101.13	103.43	98.60	102.01	102.01	1.12%	402,918
May 20, 2026	99.03	101.90	98.37	100.88	100.88	2.55%	371,678
May 19, 2026	100.25	100.26	96.69	98.37	98.37	-2.35%	492,707
May 18, 2026	103.22	104.16	100.58	100.74	100.74	-1.41%	447,230
May 15, 2026	104.22	104.39	101.72	102.18	102.18	-3.19%	560,751
May 14, 2026	104.31	105.72	101.62	105.55	105.55	1.61%	426,527
May 13, 2026	99.58	104.20	98.22	103.88	103.88	3.93%	518,200
May 12, 2026	103.50	103.66	98.36	99.95	99.95	-3.43%	645,725
May 11, 2026	100.14	105.33	99.94	103.50	103.50	4.17%	572,035
May 8, 2026	98.51	100.15	97.00	99.36	99.36	0.52%	505,003
May 7, 2026	103.55	104.68	98.53	98.85	98.85	-4.92%	836,858
May 6, 2026	103.00	105.03	98.95	103.97	103.97	4.80%	989,856
May 5, 2026	100.32	101.37	97.45	99.21	99.21	-0.31%	398,043
May 4, 2026	98.00	101.08	98.00	99.52	99.52	1.17%	457,421
May 1, 2026	99.16	99.47	97.08	98.37	98.37	-0.61%	447,698
Apr 30, 2026	99.00	99.76	97.20	98.97	98.97	0.46%	577,600
Apr 29, 2026	100.27	100.35	98.11	98.52	98.52	-2.66%	576,818
Apr 28, 2026	99.50	102.47	97.79	101.21	101.21	2.74%	663,207
Apr 27, 2026	100.44	103.42	98.31	98.51	98.51	-1.49%	994,861
Apr 24, 2026	102.54	105.94	98.91	100.00	100.00	-2.55%	778,708
Apr 23, 2026	106.34	106.98	102.26	102.62	102.62	-2.78%	651,593
Apr 22, 2026	106.43	107.00	103.93	105.55	105.55	-0.32%	345,935
Apr 21, 2026	104.94	106.45	103.64	105.89	105.89	0.40%	494,947
Apr 20, 2026	105.47	106.46	104.00	105.47	105.47	-0.48%	540,470
Apr 17, 2026	105.57	106.90	103.51	105.98	105.98	2.17%	1,006,314
Apr 16, 2026	103.59	104.53	102.46	103.73	103.73	-1.62%	417,822
Apr 15, 2026	105.96	106.66	103.02	105.44	105.44	0.69%	770,162
Apr 14, 2026	97.58	104.97	97.58	104.72	104.72	7.33%	849,466
Apr 13, 2026	98.61	101.04	95.40	97.57	97.57	-1.26%	1,088,562
Apr 10, 2026	104.28	104.28	98.40	98.82	98.82	-5.06%	577,290
Apr 9, 2026	101.45	105.11	101.45	104.09	104.09	1.95%	699,455
Apr 8, 2026	104.28	105.88	101.62	102.09	102.09	-1.60%	819,198
Apr 7, 2026	103.43	103.96	101.31	103.75	103.75	0.84%	785,703
Apr 6, 2026	103.72	104.46	101.84	102.89	102.89	-0.86%	528,510
Apr 2, 2026	101.59	104.31	101.59	103.78	103.78	0.11%	601,602
Apr 1, 2026	105.51	107.84	102.70	103.67	103.67	-1.64%	583,867
Mar 31, 2026	101.23	105.99	101.06	105.40	105.40	5.54%	944,904
Mar 30, 2026	99.04	102.76	98.08	99.87	99.87	0.91%	884,399
Mar 27, 2026	101.27	101.92	97.89	98.97	98.97	-3.13%	785,508
Mar 26, 2026	103.25	105.69	102.01	102.17	102.17	-2.05%	1,045,276
Mar 25, 2026	99.42	105.00	97.16	104.31	104.31	3.90%	812,176
Mar 24, 2026	97.16	100.98	97.16	100.39	100.39	1.88%	940,176
Mar 23, 2026	100.00	102.06	98.15	98.54	98.54	-0.33%	925,423
Mar 20, 2026	101.47	101.80	97.83	98.87	98.87	-2.76%	2,029,217
Mar 19, 2026	98.45	105.69	98.35	101.68	101.68	4.73%	1,919,749
Mar 18, 2026	97.04	99.50	90.58	97.09	97.09	-0.14%	1,981,543
Mar 17, 2026	96.70	99.31	96.43	97.23	97.23	0.50%	799,232
Mar 16, 2026	93.28	97.08	92.61	96.75	96.75	4.75%	695,757
Mar 13, 2026	96.91	98.30	90.92	92.36	92.36	-3.21%	896,180
Mar 12, 2026	95.01	96.39	93.67	95.42	95.42	-1.10%	750,591
Mar 11, 2026	96.84	98.32	95.97	96.48	96.48	-0.59%	788,741
Mar 10, 2026	96.02	98.21	95.40	97.05	97.05	0.40%	856,024
Mar 9, 2026	91.14	97.54	91.14	96.66	96.66	4.96%	727,214
Mar 6, 2026	89.96	92.97	87.82	92.09	92.09	0.74%	572,368
Mar 5, 2026	94.54	94.54	90.35	91.41	91.41	-3.61%	677,477
Mar 4, 2026	91.94	95.43	91.03	94.83	94.83	3.87%	782,718
Mar 3, 2026	92.56	93.51	90.02	91.30	91.30	-3.12%	529,537
Mar 2, 2026	92.08	94.89	90.99	94.24	94.24	2.35%	942,703
Feb 27, 2026	88.18	92.23	87.15	92.08	92.08	4.17%	936,969
Feb 26, 2026	87.50	88.83	85.60	88.39	88.39	1.48%	706,162
Feb 25, 2026	87.50	88.46	86.26	87.10	87.10	-0.33%	285,861
Feb 24, 2026	86.72	89.59	86.00	87.39	87.39	0.92%	668,518
Feb 23, 2026	82.32	86.85	77.00	86.59	86.59	4.63%	710,805
Feb 20, 2026	83.26	83.69	80.72	82.76	82.76	-0.40%	577,977
Feb 19, 2026	81.88	83.22	80.59	83.09	83.09	0.12%	384,567
Feb 18, 2026	81.59	83.40	81.59	82.99	82.99	0.64%	408,213
Feb 17, 2026	81.07	83.13	80.40	82.46	82.46	1.19%	364,763
Feb 13, 2026	81.99	84.06	80.59	81.49	81.49	-0.54%	428,856
Feb 12, 2026	84.07	84.72	81.56	81.93	81.93	-1.87%	352,498
Feb 11, 2026	83.46	84.82	80.99	83.49	83.49	-0.46%	350,174
Feb 10, 2026	83.00	84.90	82.65	83.88	83.88	0.67%	442,583
Feb 9, 2026	83.47	83.90	82.21	83.32	83.32	-1.38%	322,026
Feb 6, 2026	82.11	85.05	81.55	84.49	84.49	4.74%	812,801
Feb 5, 2026	83.62	85.43	80.20	80.67	80.67	-3.16%	457,128
Feb 4, 2026	85.59	85.60	81.00	83.30	83.30	-2.68%	1,077,554
Feb 3, 2026	83.09	86.10	82.88	85.59	85.59	3.06%	769,388