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 — 2021

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2021-12-31$34.20$34.20532,700
2021-12-30$34.25$34.25549,400
2021-12-29$34.38$34.38387,000
2021-12-28$34.01$34.01435,300
2021-12-27$34.19$34.19397,400
2021-12-23$34.25$34.25601,600
2021-12-22$32.63$32.63282,200
2021-12-21$32.24$32.24374,600
2021-12-20$31.68$31.68586,900
2021-12-17$30.36$30.361,799,000
2021-12-16$28.94$28.94805,300
2021-12-15$30.54$30.54673,700
2021-12-14$29.75$29.75732,300
2021-12-13$31.94$31.941,114,600
2021-12-10$31.81$31.81307,200
2021-12-09$32.38$32.38326,400
2021-12-08$34.04$34.04468,900
2021-12-07$33.82$33.82387,700
2021-12-06$32.81$32.81282,300
2021-12-03$32.27$32.27476,800
2021-12-02$32.69$32.69556,200
2021-12-01$30.93$30.93738,100
2021-11-30$33.62$33.62414,500
2021-11-29$32.57$32.57398,300
2021-11-26$33.26$33.26271,500
2021-11-24$34.71$34.71288,800
2021-11-23$34.69$34.69419,600
2021-11-22$34.15$34.15360,700
2021-11-19$35.03$35.03707,300
2021-11-18$36.41$36.41652,900
2021-11-17$36.42$36.42339,800
2021-11-16$36.71$36.71760,200
2021-11-15$35.74$35.74436,100
2021-11-12$37.10$37.10533,700
2021-11-11$36.25$36.25397,900
2021-11-10$36.10$36.10973,300
2021-11-09$35.51$35.51554,400
2021-11-08$34.64$34.641,086,400
2021-11-05$33.74$33.74526,700
2021-11-04$33.86$33.86783,200
2021-11-03$32.93$32.93614,600
2021-11-02$32.25$32.25662,400
2021-11-01$32.96$32.96556,700
2021-10-29$31.16$31.16505,600
2021-10-28$32.37$32.37662,600
2021-10-27$31.86$31.86472,400
2021-10-26$32.42$32.42370,700
2021-10-25$31.95$31.95514,900
2021-10-22$30.96$30.96528,700
2021-10-21$31.05$31.05816,000
2021-10-20$29.99$29.99803,700
2021-10-19$29.69$29.69494,400
2021-10-18$30.12$30.121,000,400
2021-10-15$30.97$30.97887,100
2021-10-14$31.19$31.191,351,900
2021-10-13$31.80$31.801,260,200
2021-10-12$31.72$31.724,749,600
2021-10-11$35.36$35.3645,683,600
2021-10-08$18.24$18.24383,600
2021-10-07$18.11$18.11381,500
2021-10-06$17.63$17.63577,000
2021-10-05$17.99$17.99638,000
2021-10-04$17.75$17.75802,000
2021-10-01$17.95$17.95570,800
2021-09-30$17.72$17.72969,900
2021-09-29$17.57$17.571,045,500
2021-09-28$18.23$18.231,331,600
2021-09-27$19.16$19.161,892,100
2021-09-24$18.81$18.812,157,600
2021-09-23$18.00$18.002,955,600
2021-09-22$15.47$15.472,934,800
2021-09-21$15.31$15.318,137,800
2021-09-20$12.95$12.9513,324,800
2021-09-17$17.53$17.5312,499,000
2021-09-16$46.13$46.13163,800
2021-09-15$46.47$46.47293,500
2021-09-14$45.06$45.06309,100
2021-09-13$45.39$45.39293,300
2021-09-10$45.08$45.08366,000
2021-09-09$45.82$45.82320,100
2021-09-08$46.37$46.37342,700
2021-09-07$48.63$48.63342,700
2021-09-03$48.88$48.88214,800
2021-09-02$49.62$49.62265,800
2021-09-01$49.69$49.69297,800
2021-08-31$48.50$48.50318,500
2021-08-30$46.76$46.76232,400
2021-08-27$47.87$47.87311,600
2021-08-26$47.15$47.15247,600
2021-08-25$49.07$49.07155,000
2021-08-24$49.67$49.67216,500
2021-08-23$49.59$49.59400,200
2021-08-20$49.22$49.22315,900
2021-08-19$48.23$48.23219,100
2021-08-18$46.66$46.66279,000
2021-08-17$48.28$48.28182,600
2021-08-16$47.85$47.85148,400
2021-08-13$47.69$47.69223,100
2021-08-12$48.61$48.61250,900
2021-08-11$48.00$48.00306,800
2021-08-10$49.60$49.60498,200
2021-08-09$49.07$49.07290,300
2021-08-06$48.11$48.11478,700
2021-08-05$48.19$48.19440,800
2021-08-04$48.98$48.98451,700
2021-08-03$49.26$49.26389,400
2021-08-02$49.08$49.08245,700
2021-07-30$49.43$49.43517,000
2021-07-29$47.12$47.12362,600
2021-07-28$46.99$46.99462,800
2021-07-27$45.51$45.51498,700
2021-07-26$46.80$46.80399,300
2021-07-23$47.02$47.02336,200
2021-07-22$46.82$46.82466,900
2021-07-21$47.96$47.96506,700
2021-07-20$48.40$48.40423,900
2021-07-19$46.72$46.72317,900
2021-07-16$45.82$45.82251,400
2021-07-15$44.26$44.26226,600
2021-07-14$44.87$44.87451,900
2021-07-13$46.12$46.12218,200
2021-07-12$46.32$46.32173,600
2021-07-09$46.19$46.19293,300
2021-07-08$45.42$45.42313,400
2021-07-07$45.17$45.17352,300
2021-07-06$45.12$45.12233,300
2021-07-02$46.36$46.36352,800
2021-07-01$46.80$46.80635,700
2021-06-30$44.88$44.88939,900
2021-06-29$44.10$44.10246,300
2021-06-28$43.87$43.87238,600
2021-06-25$43.61$43.611,167,600
2021-06-24$42.88$42.88373,000
2021-06-23$43.27$43.27286,400
2021-06-22$43.40$43.40446,900
2021-06-21$43.44$43.44503,000
2021-06-18$42.47$42.471,229,300
2021-06-17$43.14$43.14629,500
2021-06-16$41.71$41.712,438,000
2021-06-15$38.15$38.15416,000
2021-06-14$41.11$41.11384,100
2021-06-11$39.64$39.64864,400
2021-06-10$33.84$33.84463,600
2021-06-09$35.33$35.33508,000
2021-06-08$37.44$37.44383,500
2021-06-07$35.52$35.52526,700
2021-06-04$34.81$34.81205,600
2021-06-03$34.85$34.85191,200
2021-06-02$34.49$34.49250,000
2021-06-01$34.14$34.14343,300
2021-05-28$35.11$35.11319,900
2021-05-27$35.23$35.23896,200
2021-05-26$34.91$34.91220,100
2021-05-25$34.84$34.84321,600
2021-05-24$35.31$35.31807,800
2021-05-21$34.28$34.28291,000
2021-05-20$32.92$32.92180,200
2021-05-19$31.47$31.47237,100
2021-05-18$31.59$31.59401,400
2021-05-17$30.07$30.07141,100
2021-05-14$30.47$30.47239,200
2021-05-13$29.00$29.00229,500
2021-05-12$29.29$29.29222,400
2021-05-11$29.51$29.51168,700
2021-05-10$28.29$28.29167,600
2021-05-07$29.18$29.181,014,000
2021-05-06$28.02$28.02222,100
2021-05-05$29.10$29.10202,900
2021-05-04$29.35$29.35284,500
2021-05-03$29.21$29.21230,700
2021-04-30$28.94$28.94167,500
2021-04-29$29.99$29.99298,400
2021-04-28$29.61$29.61228,100
2021-04-27$29.52$29.52274,000
2021-04-26$29.64$29.64368,300
2021-04-23$29.07$29.07215,500
2021-04-22$29.35$29.35378,600
2021-04-21$27.91$27.91244,700
2021-04-20$26.62$26.62223,800
2021-04-19$26.10$26.10293,200
2021-04-16$26.55$26.55212,700
2021-04-15$26.63$26.63264,300
2021-04-14$25.99$25.99227,100
2021-04-13$25.57$25.57369,600
2021-04-12$26.22$26.22430,600
2021-04-09$26.58$26.58437,900
2021-04-08$26.70$26.70148,800
2021-04-07$25.87$25.87248,700
2021-04-06$25.87$25.87262,900
2021-04-05$26.84$26.84279,500
2021-04-01$26.71$26.71209,600
2021-03-31$25.90$25.90302,300
2021-03-30$25.31$25.31163,900
2021-03-29$25.22$25.22285,800
2021-03-26$27.21$27.21259,600
2021-03-25$28.52$28.52242,900
2021-03-24$27.44$27.44251,300
2021-03-23$28.89$28.89373,200
2021-03-22$31.09$31.09159,200
2021-03-19$31.15$31.151,103,000
2021-03-18$29.41$29.41217,500
2021-03-17$30.99$30.99240,500
2021-03-16$30.25$30.25245,500
2021-03-15$30.83$30.83182,000
2021-03-12$31.00$31.00299,000
2021-03-11$31.05$31.05677,300
2021-03-10$29.83$29.83281,800
2021-03-09$30.00$30.00271,700
2021-03-08$29.65$29.65463,400
2021-03-05$29.12$29.12436,400
2021-03-04$28.11$28.11547,900
2021-03-03$29.35$29.35568,500
2021-03-02$29.35$29.35712,000
2021-03-01$26.75$26.75518,300
2021-02-26$23.57$23.57434,200
2021-02-25$23.99$23.99267,500
2021-02-24$25.31$25.31189,100
2021-02-23$25.71$25.71443,900
2021-02-22$25.69$25.69261,100
2021-02-19$25.63$25.63227,700
2021-02-18$25.75$25.75639,000
2021-02-17$25.45$25.45385,400
2021-02-16$27.02$27.02392,600
2021-02-12$26.14$26.14376,900
2021-02-11$25.09$25.09306,500
2021-02-10$24.59$24.59278,300
2021-02-09$25.56$25.56466,600
2021-02-08$24.64$24.64261,200
2021-02-05$22.38$22.38362,300
2021-02-04$21.44$21.44169,900
2021-02-03$21.58$21.58208,500
2021-02-02$21.95$21.95411,100
2021-02-01$20.73$20.73364,200
2021-01-29$20.71$20.71306,300
2021-01-28$21.26$21.26198,300
2021-01-27$20.66$20.66405,600
2021-01-26$23.09$23.09272,700
2021-01-25$23.63$23.63197,800
2021-01-22$22.36$22.36317,800
2021-01-21$23.54$23.54357,000
2021-01-20$24.56$24.56429,400
2021-01-19$24.82$24.82559,900
2021-01-15$24.37$24.37758,600
2021-01-14$22.85$22.85365,200
2021-01-13$21.33$21.33343,300
2021-01-12$21.21$21.21416,400
2021-01-11$20.62$20.62250,300
2021-01-08$20.65$20.65413,500
2021-01-07$21.16$21.16417,600
2021-01-06$19.69$19.69840,200
2021-01-05$19.02$19.02744,700
2021-01-04$19.60$19.60462,800