NASDAQ:PTGX | Historical Stock Price | Protagonist Therapeutics, Inc

Complete retained daily price history on its own workbook tab. Split-adjusted close keeps every historical share price on one comparable split basis. Cumulative dividend-reinvested close is the daily close of a rebased total-return index: it starts with one share at the earliest retained close, reinvests every distribution, and normalizes every forward and reverse split exactly once. Admitted exchange opening prices remain a distinct current-session series.

Available history
2016-08-11 to 2026-09-04
Data captured

Stock Price Chart

Blue: Split-adjusted close · Orange: Cumulative dividend-reinvested close

$5.13$10.24$20.45$40.84$81.56$162.862016-08-112026-08-27

Logarithmic scale. Both lines share the same starting value for the selected range.

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Historical Stock Price — 2023

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2023-12-29$22.93$22.93326,400
2023-12-28$23.13$23.13546,000
2023-12-27$23.44$23.44484,600
2023-12-26$23.02$23.02581,400
2023-12-22$22.24$22.24433,300
2023-12-21$21.61$21.61624,700
2023-12-20$20.75$20.75676,600
2023-12-19$21.80$21.80992,200
2023-12-18$20.73$20.73591,400
2023-12-15$21.07$21.073,454,600
2023-12-14$20.77$20.77874,700
2023-12-13$20.35$20.351,067,300
2023-12-12$19.60$19.60760,600
2023-12-11$19.96$19.96856,600
2023-12-08$20.36$20.36686,100
2023-12-07$20.91$20.911,035,300
2023-12-06$20.95$20.951,078,700
2023-12-05$19.70$19.70956,500
2023-12-04$18.24$18.24575,900
2023-12-01$18.56$18.56454,300
2023-11-30$18.21$18.21447,100
2023-11-29$17.69$17.69454,000
2023-11-28$17.52$17.52653,000
2023-11-27$17.42$17.42686,100
2023-11-24$17.23$17.23170,500
2023-11-22$16.83$16.83461,500
2023-11-21$17.36$17.36594,000
2023-11-20$17.24$17.24328,500
2023-11-17$16.81$16.81503,200
2023-11-16$16.12$16.12551,200
2023-11-15$16.29$16.29720,100
2023-11-14$16.47$16.47862,300
2023-11-13$15.79$15.79352,100
2023-11-10$15.49$15.49373,000
2023-11-09$15.04$15.04644,600
2023-11-08$15.97$15.97577,900
2023-11-07$16.47$16.47786,200
2023-11-06$16.29$16.29714,300
2023-11-03$16.65$16.651,315,800
2023-11-02$15.41$15.41506,700
2023-11-01$15.11$15.11567,600
2023-10-31$14.54$14.54941,600
2023-10-30$14.28$14.28678,400
2023-10-27$14.08$14.08944,300
2023-10-26$14.21$14.21484,200
2023-10-25$14.09$14.09603,600
2023-10-24$14.25$14.25598,700
2023-10-23$14.05$14.05580,000
2023-10-20$14.42$14.42617,200
2023-10-19$14.41$14.41526,800
2023-10-18$14.86$14.86988,100
2023-10-17$15.49$15.49872,400
2023-10-16$15.78$15.78921,200
2023-10-13$15.44$15.44581,900
2023-10-12$15.37$15.37788,000
2023-10-11$15.60$15.60569,200
2023-10-10$16.38$16.38596,100
2023-10-09$16.52$16.52399,200
2023-10-06$16.24$16.24331,700
2023-10-05$16.23$16.23595,300
2023-10-04$15.95$15.95644,400
2023-10-03$16.24$16.24439,500
2023-10-02$16.34$16.34768,300
2023-09-29$16.68$16.681,388,400
2023-09-28$17.13$17.13573,200
2023-09-27$17.57$17.57406,300
2023-09-26$17.49$17.49614,300
2023-09-25$17.19$17.19800,000
2023-09-22$17.11$17.11658,600
2023-09-21$16.98$16.98824,900
2023-09-20$17.00$17.00543,500
2023-09-19$17.68$17.68519,300
2023-09-18$17.65$17.65687,300
2023-09-15$17.90$17.902,338,600
2023-09-14$18.00$18.00594,900
2023-09-13$18.44$18.44598,800
2023-09-12$18.81$18.81389,700
2023-09-11$18.86$18.86774,400
2023-09-08$19.05$19.05445,400
2023-09-07$18.76$18.76793,800
2023-09-06$19.78$19.78437,700
2023-09-05$19.57$19.57454,800
2023-09-01$19.54$19.54588,600
2023-08-31$19.82$19.82490,700
2023-08-30$19.93$19.93415,500
2023-08-29$20.25$20.25326,700
2023-08-28$20.25$20.25295,100
2023-08-25$19.92$19.92372,500
2023-08-24$19.29$19.29531,000
2023-08-23$20.37$20.37498,200
2023-08-22$20.19$20.19869,200
2023-08-21$19.53$19.53493,900
2023-08-18$19.13$19.13617,600
2023-08-17$18.75$18.75584,100
2023-08-16$18.54$18.54901,600
2023-08-15$18.76$18.76453,400
2023-08-14$19.05$19.05508,200
2023-08-11$18.91$18.91525,700
2023-08-10$18.80$18.80530,700
2023-08-09$18.23$18.23793,600
2023-08-08$18.19$18.19679,400
2023-08-07$18.93$18.93755,500
2023-08-04$19.18$19.18701,100
2023-08-03$18.57$18.57377,800
2023-08-02$18.57$18.57455,700
2023-08-01$19.02$19.021,217,600
2023-07-31$19.40$19.40574,200
2023-07-28$19.09$19.09681,400
2023-07-27$18.78$18.78774,600
2023-07-26$19.13$19.13618,700
2023-07-25$19.36$19.36396,500
2023-07-24$19.58$19.58583,800
2023-07-21$20.00$20.00947,100
2023-07-20$19.90$19.90827,500
2023-07-19$19.94$19.94666,800
2023-07-18$20.69$20.691,008,900
2023-07-17$21.11$21.11875,800
2023-07-14$21.25$21.25911,600
2023-07-13$21.40$21.401,606,000
2023-07-12$20.44$20.442,326,200
2023-07-11$23.01$23.01792,200
2023-07-10$23.48$23.48920,400
2023-07-07$23.16$23.16988,100
2023-07-06$23.66$23.661,109,800
2023-07-05$23.39$23.392,949,400
2023-07-03$22.31$22.317,774,400
2023-06-30$27.62$27.621,588,100
2023-06-29$27.67$27.67828,000
2023-06-28$28.09$28.091,040,200
2023-06-27$28.08$28.08808,500
2023-06-26$28.75$28.751,139,500
2023-06-23$27.61$27.612,589,300
2023-06-22$27.54$27.541,262,600
2023-06-21$27.51$27.51829,000
2023-06-20$26.99$26.991,178,700
2023-06-16$27.71$27.714,384,700
2023-06-15$28.68$28.68718,300
2023-06-14$28.72$28.72625,300
2023-06-13$29.11$29.11489,100
2023-06-12$28.98$28.981,104,300
2023-06-09$29.09$29.09725,200
2023-06-08$29.36$29.36842,200
2023-06-07$28.99$28.99712,200
2023-06-06$28.91$28.91749,800
2023-06-05$28.77$28.771,232,700
2023-06-02$28.20$28.20725,400
2023-06-01$27.49$27.491,573,200
2023-05-31$26.07$26.07975,300
2023-05-30$25.47$25.47940,300
2023-05-26$26.25$26.25850,200
2023-05-25$25.36$25.361,149,600
2023-05-24$25.12$25.121,211,200
2023-05-23$25.20$25.202,036,200
2023-05-22$25.60$25.60923,100
2023-05-19$26.05$26.05824,000
2023-05-18$25.04$25.04738,600
2023-05-17$26.33$26.331,505,700
2023-05-16$25.40$25.40576,100
2023-05-15$25.97$25.97693,200
2023-05-12$25.37$25.37420,200
2023-05-11$24.72$24.72462,500
2023-05-10$25.02$25.02919,500
2023-05-09$25.25$25.25695,300
2023-05-08$24.93$24.93726,600
2023-05-05$24.81$24.811,145,000
2023-05-04$23.60$23.60490,800
2023-05-03$24.45$24.451,535,800
2023-05-02$23.73$23.731,414,300
2023-05-01$23.55$23.55701,300
2023-04-28$22.60$22.60736,300
2023-04-27$22.67$22.67687,000
2023-04-26$23.26$23.26625,700
2023-04-25$23.25$23.25939,100
2023-04-24$23.75$23.75597,800
2023-04-21$24.02$24.02990,400
2023-04-20$23.11$23.11890,000
2023-04-19$23.46$23.46921,800
2023-04-18$23.21$23.211,788,900
2023-04-17$20.62$20.621,709,200
2023-04-14$18.74$18.74719,900
2023-04-13$19.51$19.511,000,500
2023-04-12$18.65$18.651,289,500
2023-04-11$18.34$18.34719,700
2023-04-10$18.45$18.451,253,200
2023-04-06$18.47$18.471,830,800
2023-04-05$18.02$18.025,424,500
2023-04-04$21.55$21.55518,100
2023-04-03$22.82$22.82733,800
2023-03-31$23.00$23.001,092,200
2023-03-30$22.49$22.49901,500
2023-03-29$22.34$22.34731,800
2023-03-28$21.02$21.02588,200
2023-03-27$21.76$21.76628,000
2023-03-24$20.73$20.73933,100
2023-03-23$21.01$21.01840,500
2023-03-22$21.04$21.04999,400
2023-03-21$22.74$22.741,023,400
2023-03-20$22.78$22.781,147,700
2023-03-17$22.42$22.423,251,000
2023-03-16$23.15$23.151,889,700
2023-03-15$24.05$24.051,677,300
2023-03-14$25.28$25.281,755,400
2023-03-13$25.38$25.382,868,900
2023-03-10$25.00$25.004,704,800
2023-03-09$24.29$24.292,479,700
2023-03-08$24.12$24.125,083,400
2023-03-07$23.09$23.0922,971,500
2023-03-06$15.20$15.20566,800
2023-03-03$15.71$15.71572,100
2023-03-02$15.46$15.461,276,600
2023-03-01$15.65$15.65883,800
2023-02-28$16.22$16.22915,600
2023-02-27$16.27$16.271,328,300
2023-02-24$16.87$16.872,288,300
2023-02-23$16.24$16.242,192,900
2023-02-22$15.81$15.81687,500
2023-02-21$15.74$15.74779,400
2023-02-17$16.17$16.17727,100
2023-02-16$15.60$15.60680,600
2023-02-15$16.32$16.32933,700
2023-02-14$15.82$15.821,225,400
2023-02-13$16.04$16.041,158,300
2023-02-10$17.21$17.211,338,300
2023-02-09$17.02$17.022,193,400
2023-02-08$16.57$16.572,006,000
2023-02-07$15.83$15.831,410,800
2023-02-06$14.96$14.96932,600
2023-02-03$14.33$14.33647,900
2023-02-02$14.46$14.461,550,000
2023-02-01$14.06$14.061,067,000
2023-01-31$13.29$13.291,250,100
2023-01-30$12.99$12.99878,800
2023-01-27$13.49$13.49966,400
2023-01-26$13.18$13.18708,500
2023-01-25$13.15$13.151,414,200
2023-01-24$12.70$12.702,044,800
2023-01-23$11.47$11.47565,100
2023-01-20$11.66$11.66748,900
2023-01-19$11.83$11.83677,800
2023-01-18$11.86$11.861,197,300
2023-01-17$11.65$11.65817,500
2023-01-13$12.17$12.171,207,900
2023-01-12$12.75$12.751,174,200
2023-01-11$12.06$12.06722,000
2023-01-10$11.76$11.76677,800
2023-01-09$11.34$11.34983,400
2023-01-06$11.67$11.67704,300
2023-01-05$11.11$11.11661,100
2023-01-04$11.09$11.091,013,300
2023-01-03$10.78$10.78881,100