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 — 2019

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2019-12-31$7.05$7.05350,000——
2019-12-30$7.16$7.16266,800——
2019-12-27$7.00$7.00474,000——
2019-12-26$7.28$7.28158,300——
2019-12-24$7.47$7.47120,100——
2019-12-23$7.20$7.20275,700——
2019-12-20$7.43$7.43698,300——
2019-12-19$7.14$7.14216,500——
2019-12-18$7.10$7.10248,800——
2019-12-17$7.06$7.06306,000——
2019-12-16$7.38$7.38254,700——
2019-12-13$7.33$7.33332,600——
2019-12-12$7.31$7.31308,400——
2019-12-11$7.11$7.11429,700——
2019-12-10$7.54$7.54426,100——
2019-12-09$7.63$7.63380,100——
2019-12-06$7.69$7.69490,300——
2019-12-05$7.64$7.641,733,100——
2019-12-04$8.11$8.1119,073,400——
2019-12-03$4.69$4.693,784,900——
2019-12-02$8.85$8.85468,400——
2019-11-29$8.70$8.70342,600——
2019-11-27$8.70$8.701,774,700——
2019-11-26$7.80$7.80526,400——
2019-11-25$8.34$8.34499,100——
2019-11-22$9.47$9.47239,600——
2019-11-21$10.13$10.13264,000——
2019-11-20$10.26$10.26199,200——
2019-11-19$10.64$10.64520,300——
2019-11-18$10.20$10.20285,100——
2019-11-15$10.68$10.68237,700——
2019-11-14$10.80$10.80270,900——
2019-11-13$10.37$10.37334,500——
2019-11-12$10.15$10.15219,600——
2019-11-11$10.56$10.56171,100——
2019-11-08$10.12$10.12954,000——
2019-11-07$9.93$9.93331,500——
2019-11-06$11.60$11.60192,500——
2019-11-05$12.31$12.31148,000——
2019-11-04$12.85$12.8578,400——
2019-11-01$13.45$13.4591,500——
2019-10-31$13.45$13.4593,900——
2019-10-30$12.44$12.44188,200——
2019-10-29$12.65$12.65143,400——
2019-10-28$12.18$12.18144,500——
2019-10-25$12.02$12.02107,900——
2019-10-24$12.04$12.0486,800——
2019-10-23$12.01$12.0186,100——
2019-10-22$11.99$11.99127,900——
2019-10-21$12.01$12.0190,500——
2019-10-18$11.59$11.5987,500——
2019-10-17$12.07$12.07112,700——
2019-10-16$11.95$11.95133,300——
2019-10-15$11.72$11.72108,200——
2019-10-14$11.40$11.40161,600——
2019-10-11$10.81$10.81199,700——
2019-10-10$11.55$11.5571,600——
2019-10-09$11.50$11.5096,400——
2019-10-08$11.53$11.53122,000——
2019-10-07$11.91$11.91224,200——
2019-10-04$12.20$12.20119,400——
2019-10-03$12.06$12.06167,900——
2019-10-02$12.39$12.39164,700——
2019-10-01$11.88$11.88152,200——
2019-09-30$12.01$12.01194,000——
2019-09-27$13.15$13.15241,500——
2019-09-26$14.32$14.3294,000——
2019-09-25$15.03$15.03199,900——
2019-09-24$14.04$14.04219,800——
2019-09-23$14.13$14.13179,400——
2019-09-20$13.81$13.81285,200——
2019-09-19$13.78$13.7896,500——
2019-09-18$13.85$13.85150,000——
2019-09-17$14.58$14.58141,500——
2019-09-16$14.42$14.42146,900——
2019-09-13$14.82$14.82129,300——
2019-09-12$14.52$14.52137,700——
2019-09-11$14.16$14.16244,800——
2019-09-10$13.72$13.72469,800——
2019-09-09$16.56$16.56401,800——
2019-09-06$15.56$15.56181,100——
2019-09-05$15.10$15.10355,000——
2019-09-04$14.72$14.72198,500——
2019-09-03$14.24$14.24448,900——
2019-08-30$13.03$13.03185,000——
2019-08-29$12.22$12.22247,600——
2019-08-28$12.69$12.69195,800——
2019-08-27$13.14$13.14279,300——
2019-08-26$12.98$12.98248,100——
2019-08-23$12.68$12.68636,700——
2019-08-22$12.56$12.56756,800——
2019-08-21$11.85$11.85177,300——
2019-08-20$11.77$11.77173,900——
2019-08-19$11.04$11.04123,900——
2019-08-16$10.24$10.2499,000——
2019-08-15$9.99$9.99121,600——
2019-08-14$9.89$9.89126,500——
2019-08-13$9.70$9.70168,300——
2019-08-12$9.41$9.41214,200——
2019-08-09$9.42$9.42160,000——
2019-08-08$9.77$9.77250,700——
2019-08-07$9.90$9.90217,300——
2019-08-06$9.69$9.69168,700——
2019-08-05$10.05$10.05120,300——
2019-08-02$10.35$10.35102,600——
2019-08-01$10.56$10.56195,000——
2019-07-31$11.02$11.0285,000——
2019-07-30$11.10$11.1090,000——
2019-07-29$11.20$11.20101,100——
2019-07-26$11.73$11.73141,100——
2019-07-25$11.74$11.74173,000——
2019-07-24$12.32$12.32194,300——
2019-07-23$12.32$12.32157,300——
2019-07-22$12.94$12.94165,700——
2019-07-19$13.14$13.14271,400——
2019-07-18$13.29$13.2964,000——
2019-07-17$13.25$13.25138,800——
2019-07-16$13.21$13.21112,900——
2019-07-15$13.15$13.1579,100——
2019-07-12$13.23$13.23116,600——
2019-07-11$13.65$13.65898,200——
2019-07-10$13.21$13.21154,800——
2019-07-09$12.98$12.98211,400——
2019-07-08$13.38$13.38410,000——
2019-07-05$12.84$12.84171,100——
2019-07-03$12.50$12.5087,100——
2019-07-02$12.48$12.48207,600——
2019-07-01$12.45$12.45288,300——
2019-06-28$12.11$12.112,359,100——
2019-06-27$11.98$11.98116,500——
2019-06-26$11.58$11.58141,100——
2019-06-25$11.55$11.55124,500——
2019-06-24$11.82$11.82109,500——
2019-06-21$12.02$12.02194,900——
2019-06-20$11.54$11.54115,900——
2019-06-19$12.06$12.0670,600——
2019-06-18$11.90$11.9074,600——
2019-06-17$11.86$11.86146,300——
2019-06-14$11.65$11.65177,800——
2019-06-13$12.07$12.07293,900——
2019-06-12$11.99$11.99348,200——
2019-06-11$11.92$11.92630,000——
2019-06-10$12.22$12.22513,700——
2019-06-07$11.80$11.801,372,700——
2019-06-06$10.66$10.66506,300——
2019-06-05$9.65$9.65111,200——
2019-06-04$10.00$10.0090,300——
2019-06-03$9.89$9.89101,400——
2019-05-31$10.06$10.0699,100——
2019-05-30$10.59$10.5988,500——
2019-05-29$10.89$10.8988,600——
2019-05-28$10.88$10.8897,400——
2019-05-24$11.06$11.0686,100——
2019-05-23$10.92$10.92162,000——
2019-05-22$10.96$10.96125,500——
2019-05-21$10.98$10.98126,000——
2019-05-20$10.61$10.61128,700——
2019-05-17$10.81$10.81158,600——
2019-05-16$10.82$10.82152,600——
2019-05-15$10.80$10.80196,000——
2019-05-14$10.70$10.70123,400——
2019-05-13$10.44$10.44155,100——
2019-05-10$10.67$10.67345,500——
2019-05-09$10.85$10.85401,400——
2019-05-08$9.54$9.54541,300——
2019-05-07$8.98$8.98186,800——
2019-05-06$10.10$10.10176,500——
2019-05-03$10.26$10.2676,800——
2019-05-02$10.05$10.0550,300——
2019-05-01$10.08$10.0846,700——
2019-04-30$10.33$10.3372,200——
2019-04-29$10.37$10.37181,100——
2019-04-26$10.01$10.0145,400——
2019-04-25$9.99$9.9957,100——
2019-04-24$9.77$9.7792,200——
2019-04-23$9.84$9.84129,600——
2019-04-22$10.29$10.2999,900——
2019-04-18$10.47$10.4775,000——
2019-04-17$10.44$10.44173,800——
2019-04-16$10.52$10.5292,200——
2019-04-15$10.66$10.66149,700——
2019-04-12$11.11$11.11102,000——
2019-04-11$11.51$11.51110,900——
2019-04-10$12.03$12.03212,900——
2019-04-09$12.08$12.08159,200——
2019-04-08$12.31$12.31180,000——
2019-04-05$12.96$12.96176,100——
2019-04-04$12.94$12.94149,100——
2019-04-03$12.65$12.65315,400——
2019-04-02$12.22$12.22439,700——
2019-04-01$12.67$12.67214,200——
2019-03-29$12.57$12.57239,700——
2019-03-28$12.32$12.32299,800——
2019-03-27$13.28$13.28216,600——
2019-03-26$13.77$13.77250,500——
2019-03-25$13.21$13.21451,300——
2019-03-22$13.74$13.74304,000——
2019-03-21$13.30$13.30284,600——
2019-03-20$13.16$13.16255,500——
2019-03-19$13.04$13.04244,400——
2019-03-18$12.18$12.18425,600——
2019-03-15$11.52$11.52416,500——
2019-03-14$10.07$10.07246,200——
2019-03-13$9.43$9.43243,000——
2019-03-12$9.57$9.57180,500——
2019-03-11$9.42$9.42131,500——
2019-03-08$9.13$9.13101,000——
2019-03-07$8.95$8.9589,600——
2019-03-06$8.91$8.9194,800——
2019-03-05$9.00$9.00116,100——
2019-03-04$8.82$8.82162,100——
2019-03-01$8.39$8.39200,000——
2019-02-28$8.02$8.02342,500——
2019-02-27$8.29$8.2980,900——
2019-02-26$8.04$8.0468,500——
2019-02-25$8.10$8.1051,800——
2019-02-22$8.03$8.0377,600——
2019-02-21$7.32$7.3289,900——
2019-02-20$7.16$7.1695,700——
2019-02-19$7.40$7.4053,600——
2019-02-15$7.35$7.3551,200——
2019-02-14$7.42$7.4257,000——
2019-02-13$7.19$7.1983,800——
2019-02-12$7.41$7.4193,300——
2019-02-11$7.48$7.4867,500——
2019-02-08$7.10$7.1063,000——
2019-02-07$7.05$7.05107,700——
2019-02-06$7.78$7.78180,800——
2019-02-05$8.37$8.3761,900——
2019-02-04$8.32$8.3281,400——
2019-02-01$8.44$8.44182,700——
2019-01-31$8.15$8.15131,900——
2019-01-30$8.09$8.09149,700——
2019-01-29$8.07$8.07332,500——
2019-01-28$8.08$8.08201,200——
2019-01-25$8.00$8.0076,300——
2019-01-24$7.81$7.8157,300——
2019-01-23$8.08$8.08139,900——
2019-01-22$7.97$7.97126,400——
2019-01-18$8.15$8.15169,900——
2019-01-17$7.96$7.96275,500——
2019-01-16$7.28$7.28206,800——
2019-01-15$7.38$7.38247,500——
2019-01-14$7.10$7.10139,700——
2019-01-11$7.35$7.35248,800——
2019-01-10$7.22$7.2284,600——
2019-01-09$7.07$7.07113,200——
2019-01-08$7.12$7.1255,100——
2019-01-07$7.16$7.1678,800——
2019-01-04$6.94$6.94128,700——
2019-01-03$6.50$6.5071,900——
2019-01-02$6.89$6.8981,100——