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.

View year

Historical Stock Price — 2017

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2017-12-29$20.80$20.80110,800
2017-12-28$20.43$20.4347,500
2017-12-27$20.40$20.4079,400
2017-12-26$20.31$20.31139,200
2017-12-22$19.50$19.50120,200
2017-12-21$19.55$19.5596,600
2017-12-20$19.35$19.3556,100
2017-12-19$19.64$19.64141,800
2017-12-18$19.89$19.89140,200
2017-12-15$18.99$18.99292,400
2017-12-14$18.23$18.2383,100
2017-12-13$18.16$18.16195,800
2017-12-12$17.57$17.5786,700
2017-12-11$18.26$18.2683,200
2017-12-08$18.47$18.4758,100
2017-12-07$19.30$19.3058,600
2017-12-06$18.37$18.3738,400
2017-12-05$18.39$18.39110,000
2017-12-04$17.67$17.6771,700
2017-12-01$19.25$19.2595,700
2017-11-30$19.50$19.50136,200
2017-11-29$19.21$19.2148,400
2017-11-28$19.15$19.1558,600
2017-11-27$19.31$19.3130,600
2017-11-24$19.60$19.6025,800
2017-11-22$19.61$19.6189,000
2017-11-21$19.09$19.0971,200
2017-11-20$18.56$18.56163,000
2017-11-17$17.40$17.4097,800
2017-11-16$16.27$16.27170,700
2017-11-15$16.33$16.33126,900
2017-11-14$16.57$16.57108,200
2017-11-13$16.96$16.96152,100
2017-11-10$17.05$17.05236,200
2017-11-09$17.03$17.03171,800
2017-11-08$17.01$17.01314,200
2017-11-07$15.97$15.97349,300
2017-11-06$14.71$14.7145,500
2017-11-03$14.67$14.6794,200
2017-11-02$14.47$14.4770,100
2017-11-01$14.53$14.5373,300
2017-10-31$14.97$14.9737,100
2017-10-30$15.23$15.2363,700
2017-10-27$15.37$15.37123,800
2017-10-26$14.95$14.95172,100
2017-10-25$15.57$15.5751,600
2017-10-24$15.59$15.5978,400
2017-10-23$15.73$15.7352,800
2017-10-20$15.93$15.93203,700
2017-10-19$16.25$16.2573,300
2017-10-18$16.52$16.5285,800
2017-10-17$16.20$16.20111,800
2017-10-16$15.94$15.94167,400
2017-10-13$16.36$16.36322,600
2017-10-12$16.75$16.751,436,400
2017-10-11$19.81$19.8140,500
2017-10-10$19.67$19.6734,300
2017-10-09$19.06$19.0637,500
2017-10-06$18.76$18.7617,700
2017-10-05$19.22$19.2250,000
2017-10-04$18.45$18.4516,400
2017-10-03$17.92$17.9268,500
2017-10-02$17.90$17.9033,200
2017-09-29$17.67$17.6726,700
2017-09-28$17.98$17.9852,800
2017-09-27$17.63$17.6362,100
2017-09-26$16.28$16.2818,000
2017-09-25$16.39$16.3921,700
2017-09-22$16.85$16.8522,600
2017-09-21$17.13$17.1339,500
2017-09-20$17.32$17.3248,100
2017-09-19$16.69$16.6933,400
2017-09-18$16.54$16.5451,500
2017-09-15$15.75$15.7590,500
2017-09-14$15.36$15.3641,200
2017-09-13$14.61$14.6133,300
2017-09-12$14.42$14.4237,400
2017-09-11$14.65$14.6569,900
2017-09-08$15.14$15.1465,100
2017-09-07$15.51$15.5181,800
2017-09-06$16.26$16.2678,100
2017-09-05$16.26$16.2668,700
2017-09-01$16.78$16.78161,500
2017-08-31$16.33$16.3344,600
2017-08-30$16.48$16.4844,100
2017-08-29$16.77$16.77151,500
2017-08-28$14.93$14.9390,500
2017-08-25$13.77$13.7760,600
2017-08-24$13.36$13.36106,200
2017-08-23$12.21$12.2112,600
2017-08-22$12.51$12.5133,000
2017-08-21$12.31$12.3123,900
2017-08-18$11.91$11.9160,300
2017-08-17$12.25$12.2531,600
2017-08-16$12.20$12.2049,400
2017-08-15$12.08$12.0841,000
2017-08-14$12.49$12.4992,100
2017-08-11$11.10$11.10144,600
2017-08-10$10.61$10.6188,300
2017-08-09$10.72$10.72101,000
2017-08-08$11.74$11.7434,200
2017-08-07$11.61$11.6137,900
2017-08-04$11.73$11.7358,300
2017-08-03$10.91$10.9133,700
2017-08-02$11.18$11.1854,100
2017-08-01$11.89$11.89126,700
2017-07-31$12.19$12.1970,200
2017-07-28$12.67$12.6718,100
2017-07-27$13.02$13.0289,900
2017-07-26$13.61$13.61112,000
2017-07-25$13.24$13.2431,700
2017-07-24$13.40$13.40155,300
2017-07-21$12.75$12.75107,200
2017-07-20$12.92$12.92123,400
2017-07-19$12.92$12.92115,100
2017-07-18$12.26$12.2648,200
2017-07-17$12.66$12.6646,600
2017-07-14$13.56$13.5683,300
2017-07-13$13.93$13.9375,100
2017-07-12$13.41$13.4140,100
2017-07-11$13.17$13.1755,000
2017-07-10$12.38$12.3843,400
2017-07-07$12.69$12.69136,400
2017-07-06$12.00$12.0078,600
2017-07-05$11.89$11.8993,300
2017-07-03$11.40$11.4024,000
2017-06-30$11.31$11.3145,500
2017-06-29$11.54$11.54106,300
2017-06-28$12.00$12.00142,000
2017-06-27$11.12$11.1270,100
2017-06-26$12.00$12.00117,600
2017-06-23$12.00$12.00268,000
2017-06-22$12.08$12.0883,200
2017-06-21$12.11$12.11101,700
2017-06-20$11.71$11.7159,200
2017-06-19$11.14$11.1453,800
2017-06-16$10.55$10.5572,400
2017-06-15$10.84$10.84115,100
2017-06-14$11.06$11.06142,000
2017-06-13$10.96$10.96226,400
2017-06-12$11.11$11.11132,800
2017-06-09$11.38$11.38143,900
2017-06-08$10.78$10.78217,100
2017-06-07$10.63$10.63110,400
2017-06-06$10.51$10.51116,700
2017-06-05$10.60$10.60105,900
2017-06-02$10.68$10.68231,600
2017-06-01$10.89$10.89243,600
2017-05-31$11.17$11.17357,000
2017-05-30$11.82$11.823,234,700
2017-05-26$8.22$8.2232,300
2017-05-25$8.59$8.5943,800
2017-05-24$9.10$9.1030,700
2017-05-23$9.86$9.8640,900
2017-05-22$10.44$10.447,600
2017-05-19$10.59$10.5914,900
2017-05-18$9.86$9.869,200
2017-05-17$10.30$10.3038,500
2017-05-16$10.71$10.7112,100
2017-05-15$10.74$10.7412,600
2017-05-12$10.45$10.458,200
2017-05-11$10.39$10.398,000
2017-05-10$9.65$9.6514,000
2017-05-09$9.40$9.4019,800
2017-05-08$9.15$9.1510,300
2017-05-05$9.24$9.2415,900
2017-05-04$10.17$10.173,100
2017-05-03$10.23$10.238,900
2017-05-02$10.47$10.477,600
2017-05-01$10.55$10.555,300
2017-04-28$10.12$10.127,000
2017-04-27$10.63$10.6315,600
2017-04-26$10.60$10.6010,700
2017-04-25$10.59$10.598,500
2017-04-24$10.11$10.1114,300
2017-04-21$10.57$10.5717,200
2017-04-20$10.59$10.5918,500
2017-04-19$10.53$10.5316,300
2017-04-18$10.63$10.636,400
2017-04-17$10.42$10.4211,000
2017-04-13$10.56$10.5617,400
2017-04-12$10.60$10.609,000
2017-04-11$10.55$10.5522,800
2017-04-10$10.77$10.7714,100
2017-04-07$10.35$10.3536,600
2017-04-06$11.38$11.3840,200
2017-04-05$12.38$12.3833,600
2017-04-04$12.04$12.0446,900
2017-04-03$12.12$12.1228,500
2017-03-31$12.81$12.8171,100
2017-03-30$13.41$13.4176,000
2017-03-29$13.56$13.567,200
2017-03-28$13.86$13.8652,900
2017-03-27$13.71$13.7160,600
2017-03-24$13.22$13.227,400
2017-03-23$13.15$13.1516,500
2017-03-22$12.49$12.4924,300
2017-03-21$12.34$12.3427,600
2017-03-20$13.04$13.0435,800
2017-03-17$13.09$13.0946,200
2017-03-16$12.79$12.7942,500
2017-03-15$12.71$12.7125,400
2017-03-14$12.92$12.9250,100
2017-03-13$14.05$14.0519,400
2017-03-10$13.72$13.7228,800
2017-03-09$13.54$13.5410,100
2017-03-08$13.59$13.5988,100
2017-03-07$13.47$13.4719,300
2017-03-06$13.67$13.6723,000
2017-03-03$13.80$13.8035,800
2017-03-02$14.17$14.1728,000
2017-03-01$14.73$14.7381,000
2017-02-28$13.86$13.8643,200
2017-02-27$14.42$14.4223,700
2017-02-24$14.40$14.4082,500
2017-02-23$13.96$13.9617,700
2017-02-22$14.58$14.5852,900
2017-02-21$15.17$15.1743,900
2017-02-17$15.17$15.1783,700
2017-02-16$15.09$15.0924,400
2017-02-15$15.12$15.1238,800
2017-02-14$14.79$14.7922,200
2017-02-13$15.59$15.5917,200
2017-02-10$15.62$15.6211,900
2017-02-09$15.89$15.8933,400
2017-02-08$16.92$16.9225,300
2017-02-07$17.90$17.9035,300
2017-02-06$18.97$18.978,900
2017-02-03$19.14$19.1418,300
2017-02-02$18.64$18.6415,500
2017-02-01$18.21$18.214,600
2017-01-31$18.04$18.0414,500
2017-01-30$18.80$18.8016,200
2017-01-27$19.28$19.2816,100
2017-01-26$19.97$19.9721,100
2017-01-25$19.52$19.5223,700
2017-01-24$18.46$18.4621,600
2017-01-23$17.77$17.7732,900
2017-01-20$17.73$17.7360,500
2017-01-19$18.33$18.3318,800
2017-01-18$18.92$18.9211,000
2017-01-17$18.97$18.9739,500
2017-01-13$19.54$19.5419,500
2017-01-12$18.93$18.9343,600
2017-01-11$19.54$19.5410,000
2017-01-10$19.59$19.5927,400
2017-01-09$20.40$20.4073,200
2017-01-06$20.75$20.7513,500
2017-01-05$21.05$21.0554,600
2017-01-04$21.08$21.0842,900
2017-01-03$21.18$21.1867,400