NASDAQ · PTGX

Protagonist Therapeutics, Inc.

Healthcare · Biotechnology

$138.69

Down-$1.94 (-1.38%)

Updated Oct 7, 2026, 7:51 AM

SID Score

4.8/10

Composite research score

Smart Money

56/100

Neutral

Price performance · PTGX

PTGX price history

1M range · 21 trading sessions · Daily adjusted prices

Prices through Oct 6, 2026

Daily close

View OHLC price history

PTGX OHLC price history, latest 40 sessions
Date	Open	High	Low	Close	Volume
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
Oct 2, 2026	$140.99	$141.71	$138.37	$140.06	760.3K
Oct 1, 2026	$139.23	$143.68	$138.37	$139.19	886.25K
Sep 30, 2026	$141.60	$143.74	$140.44	$140.89	787.66K
Sep 29, 2026	$143.45	$144.09	$138.88	$140.97	508.01K
Sep 28, 2026	$142.21	$143.685	$140.2401	$142.44	925.46K
Sep 25, 2026	$141.81	$143.45	$138.23	$141.86	809.29K
Sep 24, 2026	$138.76	$140.80	$134.10	$137.34	989.23K
Sep 23, 2026	$144.27	$145.28	$137.88	$138.70	513.23K
Sep 22, 2026	$144.64	$147.71	$144.50	$145.07	806.18K
Sep 21, 2026	$143.22	$145.37	$141.09	$144.98	822.2K
Sep 18, 2026	$143.09	$144.58	$140.435	$143.00	1.84M
Sep 17, 2026	$144.39	$146.50	$142.31	$143.70	558.9K
Sep 16, 2026	$144.19	$146.19	$140.88	$142.84	507.31K
Sep 15, 2026	$147.48	$147.99	$142.00	$143.40	637.52K
Sep 14, 2026	$150.23	$151.24	$146.83	$147.78	608.02K
Sep 11, 2026	$147.18	$150.48	$145.82	$148.18	478.04K
Sep 10, 2026	$143.29	$146.51	$142.00	$145.16	543.13K
Sep 9, 2026	$146.05	$151.185	$144.46	$145.09	530.53K
Sep 8, 2026	$143.61	$147.29	$142.00	$145.94	700.13K