NASDAQ:ALKS | Historical Stock Price | Alkermes plc.

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
1991-07-16 to 2026-09-04
Data captured

Stock Price Chart

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

$1.19$2.80$6.60$15.56$36.69$86.491991-07-162026-08-27

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$19.95$19.951,093,800——
2020-12-30$20.45$20.451,054,600——
2020-12-29$20.76$20.761,394,900——
2020-12-28$21.25$21.25929,200——
2020-12-24$21.46$21.46908,200——
2020-12-23$21.26$21.261,139,100——
2020-12-22$21.48$21.481,031,500——
2020-12-21$21.80$21.801,307,500——
2020-12-18$22.00$22.002,216,400——
2020-12-17$21.67$21.67623,800——
2020-12-16$21.50$21.501,252,700——
2020-12-15$22.10$22.101,334,300——
2020-12-14$21.88$21.881,371,300——
2020-12-11$21.30$21.302,706,500——
2020-12-10$20.68$20.684,365,200——
2020-12-09$18.35$18.35829,800——
2020-12-08$18.75$18.751,130,400——
2020-12-07$18.73$18.73625,500——
2020-12-04$19.08$19.08346,600——
2020-12-03$19.00$19.001,142,700——
2020-12-02$18.82$18.82763,300——
2020-12-01$18.46$18.46914,500——
2020-11-30$18.26$18.26860,900——
2020-11-27$18.50$18.50286,200——
2020-11-25$18.43$18.43361,100——
2020-11-24$18.37$18.37675,300——
2020-11-23$18.23$18.231,697,900——
2020-11-20$18.24$18.24777,300——
2020-11-19$18.17$18.171,158,500——
2020-11-18$18.04$18.041,364,400——
2020-11-17$18.30$18.301,748,800——
2020-11-16$17.84$17.841,388,700——
2020-11-13$17.80$17.801,342,700——
2020-11-12$17.32$17.32715,600——
2020-11-11$17.61$17.611,278,100——
2020-11-10$18.08$18.081,737,000——
2020-11-09$17.91$17.911,224,000——
2020-11-06$17.00$17.00946,800——
2020-11-05$17.13$17.131,903,500——
2020-11-04$17.45$17.451,353,100——
2020-11-03$16.30$16.30957,300——
2020-11-02$16.38$16.38865,100——
2020-10-30$16.25$16.251,205,800——
2020-10-29$16.28$16.281,925,200——
2020-10-28$15.39$15.391,089,000——
2020-10-27$15.91$15.91681,500——
2020-10-26$15.91$15.91826,900——
2020-10-23$16.39$16.39700,700——
2020-10-22$16.32$16.321,494,000——
2020-10-21$16.26$16.261,488,700——
2020-10-20$16.92$16.921,273,700——
2020-10-19$16.92$16.921,143,500——
2020-10-16$17.13$17.13950,900——
2020-10-15$17.25$17.25899,500——
2020-10-14$17.04$17.04649,300——
2020-10-13$17.27$17.271,440,500——
2020-10-12$17.53$17.532,876,000——
2020-10-09$16.86$16.860——
2020-10-08$16.86$16.86861,600——
2020-10-07$16.94$16.941,918,000——
2020-10-06$15.98$15.981,297,200——
2020-10-05$16.26$16.261,841,000——
2020-10-02$15.79$15.791,040,800——
2020-10-01$16.24$16.241,000,200——
2020-09-30$16.57$16.57932,800——
2020-09-29$16.53$16.53727,600——
2020-09-28$16.89$16.89908,800——
2020-09-25$16.74$16.74824,600——
2020-09-24$16.53$16.53905,700——
2020-09-23$16.83$16.833,057,500——
2020-09-22$17.16$17.16939,300——
2020-09-21$17.20$17.201,748,600——
2020-09-18$18.03$18.034,053,200——
2020-09-17$18.45$18.451,522,500——
2020-09-16$17.88$17.881,274,200——
2020-09-15$17.88$17.88954,500——
2020-09-14$17.80$17.801,830,600——
2020-09-11$17.40$17.401,617,500——
2020-09-10$17.17$17.171,463,700——
2020-09-09$16.47$16.471,107,100——
2020-09-08$16.21$16.21732,400——
2020-09-04$16.34$16.34898,200——
2020-09-03$16.38$16.38735,200——
2020-09-02$16.59$16.591,005,900——
2020-09-01$16.38$16.381,301,800——
2020-08-31$16.54$16.541,257,800——
2020-08-28$16.35$16.351,051,300——
2020-08-27$16.19$16.19766,000——
2020-08-26$16.16$16.161,059,700——
2020-08-25$16.48$16.481,251,900——
2020-08-24$16.69$16.691,048,500——
2020-08-21$17.07$17.072,493,100——
2020-08-20$18.09$18.09658,300——
2020-08-19$18.37$18.37553,400——
2020-08-18$18.55$18.55822,400——
2020-08-17$18.78$18.781,030,400——
2020-08-14$18.56$18.56483,100——
2020-08-13$18.81$18.81730,200——
2020-08-12$18.61$18.61868,700——
2020-08-11$18.20$18.20842,900——
2020-08-10$18.58$18.58922,300——
2020-08-07$18.70$18.70740,300——
2020-08-06$18.64$18.64935,500——
2020-08-05$18.74$18.74880,100——
2020-08-04$18.70$18.70787,500——
2020-08-03$18.68$18.681,545,500——
2020-07-31$18.01$18.011,738,800——
2020-07-30$18.40$18.402,065,600——
2020-07-29$18.91$18.912,460,900——
2020-07-28$20.18$20.181,311,700——
2020-07-27$20.66$20.661,244,500——
2020-07-24$19.79$19.791,843,000——
2020-07-23$19.65$19.651,037,400——
2020-07-22$20.08$20.081,343,800——
2020-07-21$19.42$19.421,315,100——
2020-07-20$19.73$19.732,078,800——
2020-07-17$19.46$19.462,662,800——
2020-07-16$19.35$19.351,693,000——
2020-07-15$19.03$19.031,570,400——
2020-07-14$19.04$19.042,523,100——
2020-07-13$19.03$19.031,166,700——
2020-07-10$19.69$19.691,084,600——
2020-07-09$20.04$20.04988,700——
2020-07-08$20.41$20.411,863,700——
2020-07-07$20.09$20.093,527,400——
2020-07-06$19.63$19.63718,000——
2020-07-02$19.59$19.59938,100——
2020-07-01$19.76$19.761,453,100——
2020-06-30$19.41$19.412,581,300——
2020-06-29$19.35$19.351,096,600——
2020-06-26$18.80$18.801,784,400——
2020-06-25$19.27$19.271,948,500——
2020-06-24$19.01$19.011,949,900——
2020-06-23$19.19$19.191,568,400——
2020-06-22$18.87$18.872,328,300——
2020-06-19$18.35$18.351,899,200——
2020-06-18$17.75$17.751,690,200——
2020-06-17$17.07$17.071,122,700——
2020-06-16$17.18$17.181,058,300——
2020-06-15$16.32$16.321,006,400——
2020-06-12$16.36$16.361,561,700——
2020-06-11$15.94$15.941,266,800——
2020-06-10$16.79$16.79902,900——
2020-06-09$17.27$17.27936,900——
2020-06-08$17.82$17.821,099,600——
2020-06-05$17.19$17.191,218,200——
2020-06-04$16.83$16.831,121,400——
2020-06-03$16.68$16.681,670,400——
2020-06-02$16.71$16.711,792,000——
2020-06-01$16.63$16.631,102,800——
2020-05-29$16.36$16.362,105,100——
2020-05-28$16.67$16.671,039,000——
2020-05-27$16.75$16.751,497,700——
2020-05-26$16.16$16.161,542,600——
2020-05-22$16.86$16.86776,000——
2020-05-21$16.58$16.58997,200——
2020-05-20$16.85$16.851,046,700——
2020-05-19$16.17$16.171,004,800——
2020-05-18$16.47$16.471,095,400——
2020-05-15$15.27$15.271,282,800——
2020-05-14$14.89$14.891,689,200——
2020-05-13$15.41$15.412,024,000——
2020-05-12$15.61$15.611,463,500——
2020-05-11$15.67$15.671,583,200——
2020-05-08$14.99$14.991,169,200——
2020-05-07$14.67$14.671,202,400——
2020-05-06$14.30$14.301,564,700——
2020-05-05$14.32$14.321,880,800——
2020-05-04$13.74$13.741,399,100——
2020-05-01$13.31$13.312,068,800——
2020-04-30$13.71$13.713,068,500——
2020-04-29$14.40$14.404,583,300——
2020-04-28$16.10$16.101,277,200——
2020-04-27$16.50$16.501,578,300——
2020-04-24$16.07$16.071,977,200——
2020-04-23$15.62$15.621,221,900——
2020-04-22$16.09$16.092,531,500——
2020-04-21$16.23$16.231,649,300——
2020-04-20$16.61$16.612,359,300——
2020-04-17$16.36$16.362,155,100——
2020-04-16$15.55$15.551,667,900——
2020-04-15$15.43$15.431,039,500——
2020-04-14$15.55$15.55986,100——
2020-04-13$15.38$15.38966,600——
2020-04-09$15.43$15.431,457,400——
2020-04-08$15.83$15.831,002,400——
2020-04-07$14.87$14.872,259,500——
2020-04-06$15.15$15.152,248,000——
2020-04-03$14.12$14.12988,600——
2020-04-02$14.02$14.021,980,400——
2020-04-01$13.90$13.903,099,000——
2020-03-31$14.42$14.422,538,000——
2020-03-30$14.40$14.401,146,500——
2020-03-27$14.40$14.401,836,700——
2020-03-26$14.39$14.391,524,600——
2020-03-25$14.14$14.141,548,000——
2020-03-24$14.06$14.061,351,500——
2020-03-23$13.44$13.442,031,200——
2020-03-20$13.38$13.382,820,300——
2020-03-19$14.26$14.261,646,900——
2020-03-18$13.06$13.061,914,300——
2020-03-17$13.33$13.332,631,300——
2020-03-16$13.99$13.992,453,900——
2020-03-13$16.14$16.142,768,700——
2020-03-12$14.84$14.842,446,700——
2020-03-11$16.25$16.253,524,000——
2020-03-10$17.66$17.662,222,300——
2020-03-09$17.44$17.442,598,200——
2020-03-06$18.99$18.992,214,100——
2020-03-05$20.46$20.461,443,100——
2020-03-04$20.34$20.342,130,400——
2020-03-03$20.06$20.063,179,200——
2020-03-02$21.24$21.243,491,700——
2020-02-28$20.84$20.842,943,900——
2020-02-27$19.63$19.634,131,700——
2020-02-26$20.26$20.262,600,100——
2020-02-25$19.93$19.932,722,900——
2020-02-24$19.77$19.772,463,500——
2020-02-21$20.24$20.241,901,700——
2020-02-20$20.43$20.433,154,000——
2020-02-19$18.67$18.672,461,300——
2020-02-18$17.61$17.611,707,200——
2020-02-14$17.77$17.773,336,700——
2020-02-13$17.65$17.653,591,200——
2020-02-12$19.10$19.101,158,100——
2020-02-11$19.10$19.10921,000——
2020-02-10$19.10$19.10837,000——
2020-02-07$18.96$18.961,374,500——
2020-02-06$19.13$19.132,394,100——
2020-02-05$19.40$19.401,975,100——
2020-02-04$17.52$17.521,114,400——
2020-02-03$17.33$17.331,988,000——
2020-01-31$17.41$17.411,090,600——
2020-01-30$17.46$17.46897,700——
2020-01-29$17.81$17.81795,700——
2020-01-28$17.77$17.771,712,600——
2020-01-27$17.15$17.151,458,600——
2020-01-24$17.62$17.621,928,200——
2020-01-23$18.20$18.201,309,800——
2020-01-22$18.58$18.582,243,000——
2020-01-21$18.52$18.521,795,700——
2020-01-17$19.24$19.242,259,900——
2020-01-16$19.99$19.991,113,100——
2020-01-15$20.00$20.001,414,400——
2020-01-14$19.45$19.451,285,100——
2020-01-13$19.02$19.021,396,100——
2020-01-10$19.52$19.521,824,300——
2020-01-09$19.21$19.211,010,700——
2020-01-08$19.29$19.29855,700——
2020-01-07$19.12$19.121,341,800——
2020-01-06$19.45$19.451,819,800——
2020-01-03$19.26$19.26929,900——
2020-01-02$19.76$19.76991,100——