NASDAQ:PRTA | Historical Stock Price | PROTHENA CORP PUBLIC LTD CO

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
2012-12-18 to 2026-09-04
Data captured

Stock Price Chart

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

$4.47$7.97$14.21$25.36$45.25$80.732012-12-212026-08-27

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

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Historical Stock Price — 2020

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2020-12-31$12.01$12.01128,500——
2020-12-30$12.38$12.3878,700——
2020-12-29$12.31$12.31167,000——
2020-12-28$12.88$12.88216,300——
2020-12-24$13.24$13.24122,600——
2020-12-23$13.25$13.2577,600——
2020-12-22$13.82$13.82238,100——
2020-12-21$13.02$13.02291,900——
2020-12-18$13.06$13.061,644,400——
2020-12-17$13.26$13.26303,900——
2020-12-16$13.09$13.09228,600——
2020-12-15$13.46$13.46370,400——
2020-12-14$12.73$12.73474,100——
2020-12-11$11.17$11.17162,400——
2020-12-10$11.44$11.44252,700——
2020-12-09$11.47$11.47563,700——
2020-12-08$11.56$11.56385,300——
2020-12-07$11.71$11.71184,600——
2020-12-04$11.53$11.53530,000——
2020-12-03$11.00$11.00251,000——
2020-12-02$11.08$11.08181,300——
2020-12-01$11.00$11.00174,300——
2020-11-30$11.32$11.32804,000——
2020-11-27$11.29$11.2982,200——
2020-11-25$11.18$11.18102,600——
2020-11-24$11.12$11.12200,600——
2020-11-23$11.50$11.50116,900——
2020-11-20$11.73$11.73168,900——
2020-11-19$11.79$11.79185,600——
2020-11-18$12.12$12.12184,000——
2020-11-17$12.35$12.35204,100——
2020-11-16$12.40$12.40184,000——
2020-11-13$12.30$12.30162,000——
2020-11-12$12.36$12.36222,400——
2020-11-11$12.39$12.39201,900——
2020-11-10$12.39$12.39237,000——
2020-11-09$12.19$12.19200,400——
2020-11-06$12.31$12.31280,500——
2020-11-05$13.73$13.73422,900——
2020-11-04$13.94$13.94866,100——
2020-11-03$11.36$11.36176,200——
2020-11-02$11.03$11.03223,100——
2020-10-30$10.91$10.91268,000——
2020-10-29$11.26$11.26190,900——
2020-10-28$11.27$11.27137,900——
2020-10-27$11.49$11.49115,700——
2020-10-26$11.35$11.35161,900——
2020-10-23$11.45$11.45377,000——
2020-10-22$11.82$11.82337,900——
2020-10-21$11.95$11.95814,700——
2020-10-20$11.26$11.26203,800——
2020-10-19$11.12$11.12170,800——
2020-10-16$11.38$11.38180,000——
2020-10-15$11.45$11.45155,400——
2020-10-14$11.23$11.23127,600——
2020-10-13$11.22$11.22320,900——
2020-10-12$11.34$11.34132,300——
2020-10-09$11.07$11.07105,300——
2020-10-08$11.04$11.04138,900——
2020-10-07$11.07$11.07114,800——
2020-10-06$10.93$10.93279,700——
2020-10-05$10.64$10.64163,900——
2020-10-02$10.12$10.12242,900——
2020-10-01$10.31$10.31246,200——
2020-09-30$9.99$9.99257,100——
2020-09-29$9.93$9.93155,200——
2020-09-28$10.00$10.00148,000——
2020-09-25$10.14$10.14192,200——
2020-09-24$10.02$10.02233,800——
2020-09-23$10.12$10.12332,700——
2020-09-22$10.30$10.30262,200——
2020-09-21$10.23$10.23400,900——
2020-09-18$10.66$10.661,470,200——
2020-09-17$10.40$10.40529,000——
2020-09-16$10.85$10.85842,000——
2020-09-15$11.86$11.86228,000——
2020-09-14$11.67$11.67389,500——
2020-09-11$12.22$12.22471,600——
2020-09-10$12.17$12.17210,900——
2020-09-09$12.16$12.16246,600——
2020-09-08$12.31$12.31206,800——
2020-09-04$13.29$13.29300,300——
2020-09-03$12.31$12.31157,600——
2020-09-02$12.62$12.62154,800——
2020-09-01$12.64$12.64122,500——
2020-08-31$12.96$12.96168,800——
2020-08-28$12.89$12.8975,100——
2020-08-27$12.68$12.68101,300——
2020-08-26$12.64$12.64235,400——
2020-08-25$12.97$12.97133,900——
2020-08-24$12.88$12.88153,300——
2020-08-21$13.04$13.04238,100——
2020-08-20$12.99$12.99165,500——
2020-08-19$12.37$12.37268,300——
2020-08-18$13.35$13.35281,400——
2020-08-17$13.25$13.25216,000——
2020-08-14$12.32$12.32144,900——
2020-08-13$12.74$12.74117,800——
2020-08-12$12.60$12.60104,400——
2020-08-11$12.47$12.47264,700——
2020-08-10$12.72$12.72145,500——
2020-08-07$12.72$12.72149,100——
2020-08-06$12.91$12.91235,000——
2020-08-05$12.29$12.29148,800——
2020-08-04$12.55$12.5598,900——
2020-08-03$12.76$12.76102,400——
2020-07-31$12.24$12.24332,000——
2020-07-30$12.60$12.60130,400——
2020-07-29$12.54$12.54197,900——
2020-07-28$12.60$12.60221,500——
2020-07-27$12.83$12.83266,800——
2020-07-24$12.18$12.18218,000——
2020-07-23$12.32$12.32125,500——
2020-07-22$12.68$12.68206,800——
2020-07-21$12.90$12.90408,900——
2020-07-20$13.47$13.47386,200——
2020-07-17$13.09$13.09297,000——
2020-07-16$12.64$12.64313,500——
2020-07-15$12.40$12.40745,600——
2020-07-14$12.55$12.55494,200——
2020-07-13$11.65$11.65461,500——
2020-07-10$11.36$11.36195,500——
2020-07-09$12.08$12.08687,500——
2020-07-08$10.92$10.92157,200——
2020-07-07$10.70$10.70166,900——
2020-07-06$10.68$10.68231,200——
2020-07-02$10.98$10.98290,300——
2020-07-01$10.54$10.54291,300——
2020-06-30$10.46$10.46202,600——
2020-06-29$10.27$10.27248,500——
2020-06-26$10.12$10.121,368,700——
2020-06-25$9.85$9.85334,600——
2020-06-24$9.75$9.75375,400——
2020-06-23$10.51$10.51197,300——
2020-06-22$10.64$10.64399,600——
2020-06-19$9.91$9.911,051,800——
2020-06-18$10.27$10.27282,500——
2020-06-17$9.92$9.92267,700——
2020-06-16$9.73$9.73259,500——
2020-06-15$9.56$9.56330,700——
2020-06-12$9.67$9.67421,200——
2020-06-11$9.96$9.96304,500——
2020-06-10$10.63$10.63176,600——
2020-06-09$10.78$10.78198,200——
2020-06-08$10.72$10.72223,300——
2020-06-05$10.75$10.75263,000——
2020-06-04$10.90$10.90235,200——
2020-06-03$11.12$11.12260,700——
2020-06-02$11.52$11.52241,300——
2020-06-01$10.90$10.90238,900——
2020-05-29$10.66$10.66432,700——
2020-05-28$11.11$11.11225,500——
2020-05-27$11.54$11.54282,100——
2020-05-26$11.52$11.52183,500——
2020-05-22$11.88$11.88192,200——
2020-05-21$12.19$12.19350,500——
2020-05-20$11.33$11.33250,500——
2020-05-19$10.65$10.65159,800——
2020-05-18$11.31$11.31230,500——
2020-05-15$11.29$11.29168,800——
2020-05-14$11.11$11.11187,700——
2020-05-13$11.50$11.50244,200——
2020-05-12$12.24$12.24302,000——
2020-05-11$12.07$12.07244,000——
2020-05-08$11.24$11.24137,800——
2020-05-07$11.21$11.21508,900——
2020-05-06$11.92$11.92183,400——
2020-05-05$12.17$12.17198,700——
2020-05-04$12.08$12.08224,200——
2020-05-01$11.37$11.37245,000——
2020-04-30$11.22$11.22226,100——
2020-04-29$11.13$11.13557,500——
2020-04-28$11.26$11.26239,800——
2020-04-27$12.31$12.31283,000——
2020-04-24$11.95$11.95283,800——
2020-04-23$11.52$11.52187,300——
2020-04-22$11.76$11.761,139,000——
2020-04-21$12.00$12.00180,400——
2020-04-20$12.51$12.51165,900——
2020-04-17$11.86$11.86177,000——
2020-04-16$11.46$11.46185,800——
2020-04-15$11.26$11.26198,300——
2020-04-14$11.72$11.72189,700——
2020-04-13$11.22$11.22154,000——
2020-04-09$11.60$11.60237,600——
2020-04-08$11.09$11.09228,000——
2020-04-07$11.09$11.09283,500——
2020-04-06$11.87$11.87265,000——
2020-04-03$10.35$10.35212,600——
2020-04-02$11.51$11.51233,100——
2020-04-01$10.99$10.99289,800——
2020-03-31$10.70$10.70204,300——
2020-03-30$10.63$10.63170,600——
2020-03-27$9.60$9.60189,700——
2020-03-26$10.12$10.12209,500——
2020-03-25$9.56$9.56231,800——
2020-03-24$9.37$9.37287,400——
2020-03-23$9.14$9.14231,000——
2020-03-20$8.97$8.97561,600——
2020-03-19$8.61$8.61325,300——
2020-03-18$7.54$7.54351,300——
2020-03-17$7.98$7.98382,300——
2020-03-16$8.10$8.10511,200——
2020-03-13$10.00$10.00345,700——
2020-03-12$9.72$9.72427,800——
2020-03-11$9.72$9.72243,400——
2020-03-10$9.99$9.99260,200——
2020-03-09$9.29$9.29246,600——
2020-03-06$10.43$10.43155,000——
2020-03-05$11.17$11.17169,700——
2020-03-04$11.42$11.42137,500——
2020-03-03$10.68$10.68132,300——
2020-03-02$11.12$11.12168,200——
2020-02-28$10.66$10.66266,200——
2020-02-27$10.81$10.81130,200——
2020-02-26$12.00$12.00108,500——
2020-02-25$12.15$12.15198,500——
2020-02-24$12.19$12.19348,300——
2020-02-21$11.88$11.88168,000——
2020-02-20$11.96$11.96158,000——
2020-02-19$11.98$11.98146,600——
2020-02-18$12.43$12.43141,000——
2020-02-14$13.05$13.05111,700——
2020-02-13$12.92$12.92221,500——
2020-02-12$13.51$13.51118,700——
2020-02-11$12.93$12.9393,000——
2020-02-10$12.90$12.90105,500——
2020-02-07$12.75$12.75130,500——
2020-02-06$13.13$13.1376,300——
2020-02-05$12.85$12.85155,500——
2020-02-04$12.90$12.90113,100——
2020-02-03$12.72$12.72136,800——
2020-01-31$12.17$12.17227,700——
2020-01-30$12.36$12.36296,500——
2020-01-29$13.34$13.3488,400——
2020-01-28$13.53$13.5388,400——
2020-01-27$13.31$13.31105,300——
2020-01-24$13.11$13.11159,700——
2020-01-23$13.41$13.41142,600——
2020-01-22$13.92$13.92101,700——
2020-01-21$13.64$13.64170,700——
2020-01-17$14.26$14.26207,800——
2020-01-16$15.38$15.38170,600——
2020-01-15$15.23$15.23163,400——
2020-01-14$15.46$15.46213,300——
2020-01-13$14.46$14.46180,900——
2020-01-10$15.36$15.36207,100——
2020-01-09$15.77$15.77180,600——
2020-01-08$15.38$15.38184,800——
2020-01-07$15.50$15.50191,300——
2020-01-06$15.16$15.16207,100——
2020-01-03$14.96$14.96120,600——
2020-01-02$15.63$15.63118,700——