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Protagonist Therapeutics, Inc. (PTGX)
NASDAQ: PTGX · Real-Time Price · USD
144.98
+1.98 (1.38%)
At close: Sep 21, 2026, 4:00 PM EDT
144.98
0.00 (0.00%)
After-hours: Sep 21, 2026, 5:55 PM EDT

Protagonist Therapeutics Stock Price History

Historical Data

DateOpenHighLowCloseAdj. CloseChangeVolume
Sep 21, 2026143.22145.37141.09144.98144.981.38%724,722
Sep 18, 2026143.09144.58140.44143.00143.00-0.49%1,784,495
Sep 17, 2026144.39146.50142.31143.70143.700.60%558,839
Sep 16, 2026144.19146.19140.88142.84142.84-0.39%506,951
Sep 15, 2026147.48147.99142.00143.40143.40-2.96%604,907
Sep 14, 2026150.23151.24146.83147.78147.78-0.27%598,117
Sep 11, 2026147.18150.48145.82148.18148.182.08%476,241
Sep 10, 2026143.29146.51142.00145.16145.160.05%537,972
Sep 9, 2026146.05151.19144.46145.09145.09-0.58%530,488
Sep 8, 2026143.61147.29142.00145.94145.940.15%635,096
Sep 4, 2026146.47147.99144.01145.72145.72-2.07%501,296
Sep 3, 2026146.68149.49144.00148.80148.801.86%354,191
Sep 2, 2026148.00149.42144.61146.08146.08-0.28%561,612
Sep 1, 2026147.75150.34144.73146.49146.49-0.85%534,144
Aug 31, 2026143.26149.30141.95147.75147.752.37%567,395
Aug 28, 2026147.73147.95142.43144.33144.33-3.46%501,247
Aug 27, 2026150.35151.68147.11149.50149.50-1.32%381,590
Aug 26, 2026150.36152.07147.69151.50151.500.60%335,462
Aug 25, 2026155.84157.98150.09150.59150.59-2.67%664,526
Aug 24, 2026154.32158.08149.94154.72154.720.26%483,342
Aug 21, 2026152.10154.95150.82154.32154.322.41%402,542
Aug 20, 2026152.45155.25148.28150.69150.69-2.74%518,560
Aug 19, 2026160.81160.81154.22154.94154.94-1.53%786,052
Aug 18, 2026157.96160.00156.81157.34157.34-0.81%471,648
Aug 17, 2026155.11158.95153.60158.62158.622.27%506,960
Aug 14, 2026150.23155.53149.17155.10155.102.43%426,260
Aug 13, 2026153.15154.99150.92151.42151.42-0.39%444,785
Aug 12, 2026148.21152.70147.33152.01152.012.51%417,204
Aug 11, 2026151.88151.88147.37148.29148.29-1.14%306,573
Aug 10, 2026149.31151.60147.40150.00150.002.83%545,973
Aug 7, 2026146.18147.32144.44145.87145.87-0.21%321,084
Aug 6, 2026145.01148.00139.95146.18146.186.45%837,630
Aug 5, 2026137.49138.08135.39137.32137.321.11%430,528
Aug 4, 2026133.02138.05132.26135.81135.812.67%634,672
Aug 3, 2026135.78135.98131.68132.28132.28-3.19%451,166
Jul 31, 2026138.36138.37131.69136.64136.64-1.44%548,764
Jul 30, 2026131.77138.95130.63138.64138.644.24%556,392
Jul 29, 2026136.90137.43132.72133.00133.00-2.81%560,653
Jul 28, 2026136.69137.00133.20136.84136.840.94%282,383
Jul 27, 2026136.11139.92135.43135.56135.56-0.40%416,781
Jul 24, 2026136.11137.20133.78136.11136.110.50%298,402
Jul 23, 2026133.79137.33132.00135.43135.43-0.01%605,784
Jul 22, 2026139.45139.45134.42135.44135.44-2.08%710,439
Jul 21, 2026133.34139.72131.05138.31138.313.01%580,567
Jul 20, 2026141.79143.29133.64134.27134.27-4.71%762,738
Jul 17, 2026131.37141.08131.37140.91140.916.73%519,116
Jul 16, 2026135.21136.56131.35132.02132.02-2.54%602,064
Jul 15, 2026128.00139.22126.97135.46135.463.19%836,109
Jul 14, 2026131.89131.95128.68131.27131.271.06%564,974
Jul 13, 2026130.05131.36125.32129.89129.89-1.16%541,071