NASDAQ · PTGX

Protagonist Therapeutics, Inc.

Healthcare · Biotechnology

$139.37

Up+$2.14 (+1.54%)

Updated Nov 3, 2026, 6:07 PM

SID Score

5.1/10

Composite research score

Smart Money

56/100

Neutral

Price performance · PTGX

PTGX price history

1M range · 21 trading sessions · Daily adjusted prices

Prices through Nov 2, 2026

Daily close

View OHLC price history

PTGX OHLC price history, latest 40 sessions
Date	Open	High	Low	Close	Volume
Nov 2, 2026	$145.74	$146.005	$139.35	$139.37	487.07K
Oct 30, 2026	$144.34	$146.00	$142.54	$144.85	322.57K
Oct 29, 2026	$144.03	$146.44	$142.87	$144.34	325.56K
Oct 28, 2026	$139.35	$143.26	$138.29	$142.14	318.46K
Oct 27, 2026	$140.08	$142.37	$137.91	$141.12	865.93K
Oct 26, 2026	$139.24	$142.00	$137.2981	$140.32	823.28K
Oct 23, 2026	$136.89	$139.5229	$135.00	$138.43	409.36K
Oct 22, 2026	$137.49	$141.375	$136.07	$139.53	404.39K
Oct 21, 2026	$139.71	$141.85	$137.9625	$138.08	990.17K
Oct 20, 2026	$135.87	$140.82	$134.325	$137.99	774.48K
Oct 19, 2026	$130.09	$134.97	$128.01	$134.44	654.18K
Oct 16, 2026	$136.16	$136.555	$126.39	$128.75	886.81K
Oct 15, 2026	$136.72	$139.11	$136.025	$136.55	707.74K
Oct 14, 2026	$138.06	$141.13	$135.62	$136.28	679.1K
Oct 13, 2026	$146.00	$146.00	$137.81	$138.49	1.03M
Oct 12, 2026	$145.83	$152.185	$143.69	$144.88	898.52K
Oct 9, 2026	$139.91	$146.30	$138.95	$143.73	763.1K
Oct 8, 2026	$139.57	$142.18	$137.99	$139.91	1M
Oct 7, 2026	$137.34	$144.10	$137.25	$140.92	927.27K
Oct 6, 2026	$140.34	$141.00	$136.09	$138.69	635.72K
Oct 5, 2026	$139.96	$142.51	$138.08	$140.63	1.27M