Protagonist Therapeutics, Inc. (PTGX)

Protagonist Therapeutics Stock Price History

Historical Data

Date	Open	High	Low	Close	Adj. Close	Change	Volume
Jul 22, 2026	139.45	139.45	134.42	135.44	135.44	-2.08%	710,317
Jul 21, 2026	133.34	139.72	131.05	138.31	138.31	3.01%	578,838
Jul 20, 2026	141.79	143.29	133.64	134.27	134.27	-4.71%	762,501
Jul 17, 2026	131.37	141.08	131.37	140.91	140.91	6.73%	519,041
Jul 16, 2026	135.21	136.56	131.35	132.02	132.02	-2.54%	601,998
Jul 15, 2026	128.00	139.22	126.97	135.46	135.46	3.19%	835,817
Jul 14, 2026	131.89	131.95	128.68	131.27	131.27	1.06%	564,963
Jul 13, 2026	130.05	131.36	125.32	129.89	129.89	-1.16%	541,005
Jul 10, 2026	137.12	137.12	130.64	131.42	131.42	-4.52%	946,080
Jul 9, 2026	139.26	141.10	136.99	137.64	137.64	-1.73%	578,116
Jul 8, 2026	139.50	140.95	136.08	140.07	140.07	-0.55%	914,981
Jul 7, 2026	132.59	141.08	130.69	140.85	140.85	7.11%	1,374,348
Jul 6, 2026	131.25	132.79	128.15	131.50	131.50	-0.09%	640,087
Jul 2, 2026	125.89	131.87	125.24	131.62	131.62	5.15%	708,390
Jul 1, 2026	122.96	126.04	122.48	125.17	125.17	2.11%	521,774
Jun 30, 2026	122.04	124.72	119.57	122.58	122.58	0.78%	560,872
Jun 29, 2026	121.34	126.59	118.27	121.63	121.63	-0.21%	741,106
Jun 26, 2026	122.00	123.43	118.31	121.88	121.88	-0.61%	2,593,942
Jun 25, 2026	122.31	126.25	121.48	122.63	122.63	0.39%	1,048,006
Jun 24, 2026	119.38	124.80	118.81	122.15	122.15	2.68%	1,132,431
Jun 23, 2026	114.66	119.85	114.56	118.96	118.96	3.42%	700,455
Jun 22, 2026	113.24	116.57	113.24	115.03	115.03	1.92%	1,193,688
Jun 18, 2026	112.88	114.49	111.17	112.86	112.86	1.27%	1,533,672
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

Data Source: S&P Global Market Intelligence Last updated: Jul 22, 2026

Historical price data is provided by S&P Global Market Intelligence. New prices are added after the close of each trading day, and past prices are adjusted for stock splits.

Update frequency:

Daily

Last checked:

Jul 23, 2026

Data Sources Report a data error

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