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 — 2018

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2018-12-31$10.30$10.30388,800
2018-12-28$10.25$10.25192,400
2018-12-27$10.33$10.33663,800
2018-12-26$10.12$10.12367,100
2018-12-24$8.73$8.73145,100
2018-12-21$8.89$8.891,142,500
2018-12-20$9.40$9.40391,800
2018-12-19$9.60$9.60515,300
2018-12-18$10.31$10.31507,400
2018-12-17$10.99$10.99556,700
2018-12-14$11.71$11.71363,100
2018-12-13$11.71$11.71283,500
2018-12-12$11.91$11.91383,100
2018-12-11$11.63$11.63261,400
2018-12-10$11.57$11.57365,700
2018-12-07$11.36$11.36850,500
2018-12-06$11.67$11.67343,700
2018-12-04$11.42$11.42375,700
2018-12-03$12.17$12.17360,000
2018-11-30$12.01$12.01203,600
2018-11-29$11.75$11.751,365,600
2018-11-28$11.93$11.93316,000
2018-11-27$11.48$11.48477,900
2018-11-26$12.45$12.45353,600
2018-11-23$11.99$11.99153,900
2018-11-21$11.93$11.93196,600
2018-11-20$11.60$11.60462,000
2018-11-19$11.88$11.88331,900
2018-11-16$11.66$11.66445,900
2018-11-15$11.36$11.36415,700
2018-11-14$11.04$11.04475,300
2018-11-13$11.43$11.43312,100
2018-11-12$11.36$11.36544,600
2018-11-09$12.41$12.41507,100
2018-11-08$12.91$12.91605,500
2018-11-07$13.02$13.02628,200
2018-11-06$12.81$12.81340,700
2018-11-05$12.94$12.94191,300
2018-11-02$13.36$13.36487,000
2018-11-01$13.05$13.05408,800
2018-10-31$12.40$12.40458,300
2018-10-30$12.40$12.40433,700
2018-10-29$11.78$11.78473,900
2018-10-26$12.42$12.42333,800
2018-10-25$12.65$12.65543,800
2018-10-24$11.61$11.61757,800
2018-10-23$12.65$12.65610,300
2018-10-22$12.64$12.64519,200
2018-10-19$12.98$12.98764,100
2018-10-18$12.28$12.28237,500
2018-10-17$13.03$13.03619,200
2018-10-16$13.05$13.05590,300
2018-10-15$12.47$12.47440,000
2018-10-12$12.49$12.49269,000
2018-10-11$12.31$12.31266,400
2018-10-10$12.24$12.24504,700
2018-10-09$12.29$12.29305,500
2018-10-08$12.46$12.46345,200
2018-10-05$13.19$13.19357,000
2018-10-04$13.08$13.08776,900
2018-10-03$13.74$13.74240,600
2018-10-02$13.31$13.31768,800
2018-10-01$12.88$12.88324,900
2018-09-28$13.08$13.08200,300
2018-09-27$13.16$13.16268,200
2018-09-26$12.97$12.97509,900
2018-09-25$13.07$13.07290,400
2018-09-24$14.25$14.251,531,200
2018-09-21$13.34$13.343,876,000
2018-09-20$13.62$13.62219,000
2018-09-19$13.36$13.36273,900
2018-09-18$13.21$13.21500,600
2018-09-17$12.70$12.70373,100
2018-09-14$13.39$13.39394,900
2018-09-13$13.80$13.80274,100
2018-09-12$13.86$13.86321,500
2018-09-11$14.05$14.05232,200
2018-09-10$14.00$14.00186,900
2018-09-07$14.11$14.11249,400
2018-09-06$14.34$14.34352,700
2018-09-05$15.38$15.38218,500
2018-09-04$15.79$15.79263,400
2018-08-31$15.22$15.22262,400
2018-08-30$15.56$15.56295,700
2018-08-29$15.41$15.41349,900
2018-08-28$15.10$15.10234,300
2018-08-27$14.98$14.98232,200
2018-08-24$14.61$14.61199,500
2018-08-23$15.07$15.07233,400
2018-08-22$15.62$15.62319,400
2018-08-21$15.51$15.51363,200
2018-08-20$15.10$15.10232,500
2018-08-17$14.51$14.51271,400
2018-08-16$14.64$14.64307,500
2018-08-15$14.27$14.27381,400
2018-08-14$15.21$15.21348,900
2018-08-13$14.72$14.72515,400
2018-08-10$14.98$14.98356,000
2018-08-09$14.31$14.31330,200
2018-08-08$14.21$14.21348,400
2018-08-07$14.34$14.34364,200
2018-08-06$13.84$13.84275,100
2018-08-03$13.33$13.33624,600
2018-08-02$13.56$13.56324,200
2018-08-01$13.39$13.39442,200
2018-07-31$14.86$14.86528,400
2018-07-30$14.69$14.69535,500
2018-07-27$14.89$14.89625,200
2018-07-26$14.70$14.70258,400
2018-07-25$14.29$14.29493,600
2018-07-24$14.62$14.62316,400
2018-07-23$14.77$14.77217,200
2018-07-20$14.85$14.85221,900
2018-07-19$15.05$15.05239,000
2018-07-18$14.77$14.77228,400
2018-07-17$14.38$14.38370,700
2018-07-16$14.26$14.26514,400
2018-07-13$14.94$14.94342,200
2018-07-12$14.90$14.90520,700
2018-07-11$14.73$14.73419,400
2018-07-10$14.70$14.70408,800
2018-07-09$15.18$15.18455,800
2018-07-06$15.02$15.02494,400
2018-07-05$14.93$14.93405,800
2018-07-03$15.22$15.22204,000
2018-07-02$15.12$15.12332,600
2018-06-29$14.58$14.58597,400
2018-06-28$14.68$14.68636,100
2018-06-27$14.63$14.63661,600
2018-06-26$15.36$15.36442,500
2018-06-25$15.08$15.08564,300
2018-06-22$15.67$15.671,880,400
2018-06-21$15.04$15.04420,500
2018-06-20$15.40$15.40627,600
2018-06-19$14.98$14.98588,800
2018-06-18$14.56$14.56439,700
2018-06-15$14.85$14.854,533,000
2018-06-14$14.70$14.70416,400
2018-06-13$14.33$14.33389,200
2018-06-12$14.38$14.38559,800
2018-06-11$14.02$14.02516,000
2018-06-08$13.97$13.97540,000
2018-06-07$13.74$13.74356,800
2018-06-06$14.00$14.00533,900
2018-06-05$13.75$13.75669,000
2018-06-04$13.44$13.44839,600
2018-06-01$13.69$13.69636,800
2018-05-31$13.49$13.49701,500
2018-05-30$13.90$13.90575,100
2018-05-29$14.35$14.35772,400
2018-05-25$14.62$14.62403,800
2018-05-24$14.86$14.86615,500
2018-05-23$14.32$14.32477,200
2018-05-22$14.64$14.64805,100
2018-05-21$14.65$14.651,123,600
2018-05-18$15.28$15.28531,000
2018-05-17$15.60$15.601,030,000
2018-05-16$16.43$16.43537,300
2018-05-15$16.48$16.48773,400
2018-05-14$17.01$17.011,175,700
2018-05-11$15.72$15.721,275,900
2018-05-10$14.79$14.791,306,400
2018-05-09$13.56$13.561,354,000
2018-05-08$14.25$14.25914,700
2018-05-07$13.90$13.90601,000
2018-05-04$14.01$14.01994,400
2018-05-03$13.19$13.19804,300
2018-05-02$13.17$13.171,260,500
2018-05-01$12.16$12.16955,600
2018-04-30$12.00$12.001,238,200
2018-04-27$12.11$12.111,487,300
2018-04-26$11.79$11.792,751,700
2018-04-25$10.99$10.992,592,700
2018-04-24$11.09$11.094,497,800
2018-04-23$11.50$11.5015,140,900
2018-04-20$36.84$36.84439,000
2018-04-19$34.97$34.97283,600
2018-04-18$36.01$36.01424,100
2018-04-17$38.49$38.49478,300
2018-04-16$38.08$38.08283,200
2018-04-13$37.97$37.97337,500
2018-04-12$37.60$37.60264,900
2018-04-11$37.91$37.91365,600
2018-04-10$37.12$37.12506,900
2018-04-09$36.13$36.13601,400
2018-04-06$39.51$39.51509,000
2018-04-05$40.15$40.15672,800
2018-04-04$44.21$44.211,298,900
2018-04-03$39.27$39.27720,200
2018-04-02$35.24$35.24460,600
2018-03-29$36.71$36.71602,700
2018-03-28$36.52$36.52499,100
2018-03-27$37.68$37.68454,300
2018-03-26$39.34$39.34754,400
2018-03-23$38.21$38.21558,200
2018-03-22$38.22$38.22667,700
2018-03-21$38.72$38.723,271,100
2018-03-20$33.85$33.85353,400
2018-03-19$33.17$33.17441,200
2018-03-16$35.13$35.13969,600
2018-03-15$34.91$34.91388,200
2018-03-14$34.66$34.66180,500
2018-03-13$34.59$34.59161,800
2018-03-12$35.02$35.02183,000
2018-03-09$35.06$35.06232,200
2018-03-08$34.69$34.69389,900
2018-03-07$33.69$33.69210,500
2018-03-06$34.03$34.03338,100
2018-03-05$33.84$33.84352,200
2018-03-02$33.84$33.84388,100
2018-03-01$33.06$33.06396,100
2018-02-28$33.69$33.69293,200
2018-02-27$34.75$34.75360,000
2018-02-26$35.10$35.10257,900
2018-02-23$34.61$34.61189,400
2018-02-22$33.65$33.65178,400
2018-02-21$33.10$33.10217,500
2018-02-20$33.06$33.06364,900
2018-02-16$33.20$33.20434,000
2018-02-15$32.11$32.11571,700
2018-02-14$30.95$30.95363,700
2018-02-13$29.74$29.74486,600
2018-02-12$29.49$29.49500,300
2018-02-09$28.19$28.19982,700
2018-02-08$27.95$27.95560,900
2018-02-07$29.80$29.801,504,100
2018-02-06$29.13$29.132,081,300
2018-02-05$32.14$32.143,920,700
2018-02-02$39.60$39.60323,300
2018-02-01$40.32$40.32381,800
2018-01-31$41.80$41.80277,100
2018-01-30$42.89$42.89309,600
2018-01-29$44.57$44.57203,600
2018-01-26$45.04$45.04268,600
2018-01-25$44.05$44.05268,400
2018-01-24$43.72$43.72303,500
2018-01-23$44.45$44.45654,900
2018-01-22$41.51$41.51303,900
2018-01-19$39.52$39.52334,400
2018-01-18$39.69$39.69372,100
2018-01-17$40.10$40.10528,800
2018-01-16$39.95$39.95575,800
2018-01-12$41.33$41.33484,100
2018-01-11$39.62$39.62372,800
2018-01-10$38.26$38.26162,600
2018-01-09$37.02$37.02339,500
2018-01-08$36.60$36.60302,200
2018-01-05$37.67$37.67275,400
2018-01-04$38.29$38.29271,400
2018-01-03$39.28$39.28294,800
2018-01-02$37.80$37.80479,800