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.

View year

Historical Stock Price — 2021

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2021-12-31$23.26$23.26490,800
2021-12-30$23.35$23.35544,900
2021-12-29$23.89$23.89527,800
2021-12-28$23.51$23.51411,600
2021-12-27$23.71$23.71436,400
2021-12-23$24.09$24.09458,300
2021-12-22$23.72$23.72572,600
2021-12-21$23.56$23.56537,800
2021-12-20$23.46$23.46992,900
2021-12-17$23.36$23.362,877,600
2021-12-16$22.02$22.021,019,200
2021-12-15$23.14$23.141,264,800
2021-12-14$22.23$22.23977,900
2021-12-13$22.30$22.30978,100
2021-12-10$21.83$21.83768,600
2021-12-09$22.36$22.36859,600
2021-12-08$22.97$22.97811,700
2021-12-07$22.43$22.43949,300
2021-12-06$22.20$22.20827,800
2021-12-03$22.04$22.041,397,700
2021-12-02$22.11$22.111,053,200
2021-12-01$21.47$21.471,001,400
2021-11-30$21.92$21.922,514,000
2021-11-29$22.40$22.40883,800
2021-11-26$22.47$22.47610,700
2021-11-24$22.88$22.88773,900
2021-11-23$22.72$22.721,131,200
2021-11-22$22.61$22.611,415,700
2021-11-19$23.24$23.24796,400
2021-11-18$23.34$23.341,097,700
2021-11-17$23.15$23.151,260,500
2021-11-16$23.61$23.611,608,700
2021-11-15$23.16$23.161,360,400
2021-11-12$23.98$23.981,145,000
2021-11-11$24.52$24.521,630,000
2021-11-10$24.69$24.692,097,500
2021-11-09$24.83$24.834,264,900
2021-11-08$29.33$29.33845,100
2021-11-05$30.33$30.331,244,700
2021-11-04$30.35$30.35775,400
2021-11-03$30.62$30.62745,500
2021-11-02$29.70$29.70719,800
2021-11-01$29.93$29.931,174,400
2021-10-29$30.29$30.291,643,800
2021-10-28$28.94$28.941,541,400
2021-10-27$28.65$28.652,601,000
2021-10-26$31.51$31.51994,100
2021-10-25$31.80$31.80994,000
2021-10-22$30.85$30.85768,800
2021-10-21$30.66$30.66892,400
2021-10-20$30.87$30.87979,900
2021-10-19$31.01$31.01975,500
2021-10-18$30.30$30.301,469,500
2021-10-15$31.67$31.672,441,900
2021-10-14$31.85$31.85697,900
2021-10-13$31.44$31.44499,200
2021-10-12$31.58$31.58766,800
2021-10-11$31.27$31.27881,700
2021-10-08$31.70$31.701,186,500
2021-10-07$32.08$32.082,449,100
2021-10-06$31.19$31.19806,700
2021-10-05$30.88$30.88638,000
2021-10-04$30.52$30.521,153,100
2021-10-01$30.88$30.88648,700
2021-09-30$30.84$30.84700,200
2021-09-29$30.91$30.911,315,800
2021-09-28$32.13$32.131,162,100
2021-09-27$32.08$32.08730,300
2021-09-24$32.08$32.081,157,600
2021-09-23$31.91$31.91638,500
2021-09-22$30.81$30.81702,800
2021-09-21$30.29$30.29900,600
2021-09-20$29.62$29.621,287,100
2021-09-17$30.11$30.113,276,400
2021-09-16$29.79$29.791,800,200
2021-09-15$30.69$30.691,391,900
2021-09-14$30.60$30.601,196,600
2021-09-13$30.89$30.891,907,200
2021-09-10$30.52$30.521,383,700
2021-09-09$30.17$30.171,780,600
2021-09-08$29.98$29.98941,500
2021-09-07$29.67$29.671,398,600
2021-09-03$29.86$29.861,596,000
2021-09-02$30.33$30.331,934,100
2021-09-01$31.25$31.25876,300
2021-08-31$31.26$31.261,139,000
2021-08-30$31.41$31.41890,400
2021-08-27$31.11$31.111,313,300
2021-08-26$30.53$30.53776,000
2021-08-25$30.65$30.651,041,400
2021-08-24$30.37$30.37912,400
2021-08-23$30.05$30.051,433,700
2021-08-20$30.25$30.251,121,100
2021-08-19$29.80$29.801,477,100
2021-08-18$29.56$29.561,273,300
2021-08-17$29.09$29.091,273,100
2021-08-16$28.09$28.091,543,400
2021-08-13$28.75$28.753,914,400
2021-08-12$28.96$28.96750,900
2021-08-11$28.61$28.611,026,100
2021-08-10$28.65$28.651,726,300
2021-08-09$28.58$28.581,603,300
2021-08-06$28.56$28.562,275,400
2021-08-05$27.98$27.981,667,500
2021-08-04$27.97$27.972,241,600
2021-08-03$27.86$27.863,156,200
2021-08-02$26.94$26.942,166,100
2021-07-30$25.87$25.871,424,600
2021-07-29$25.56$25.561,161,600
2021-07-28$25.77$25.771,621,300
2021-07-27$24.14$24.141,139,200
2021-07-26$24.37$24.371,168,300
2021-07-23$24.48$24.48653,300
2021-07-22$24.15$24.15849,200
2021-07-21$24.10$24.10840,900
2021-07-20$23.98$23.981,486,200
2021-07-19$23.37$23.371,446,700
2021-07-16$23.71$23.711,591,800
2021-07-15$23.65$23.652,089,200
2021-07-14$23.96$23.961,836,800
2021-07-13$24.44$24.441,124,400
2021-07-12$24.91$24.912,198,400
2021-07-09$25.36$25.361,745,500
2021-07-08$25.44$25.441,720,400
2021-07-07$25.49$25.491,134,700
2021-07-06$25.56$25.561,265,100
2021-07-02$25.30$25.301,216,900
2021-07-01$24.90$24.901,498,900
2021-06-30$24.52$24.521,600,300
2021-06-29$24.30$24.301,450,800
2021-06-28$24.62$24.622,214,800
2021-06-25$24.13$24.1319,887,600
2021-06-24$24.52$24.522,010,500
2021-06-23$24.17$24.171,855,800
2021-06-22$24.24$24.241,136,500
2021-06-21$24.74$24.74904,300
2021-06-18$24.42$24.422,547,200
2021-06-17$24.69$24.691,259,200
2021-06-16$25.09$25.091,495,200
2021-06-15$24.63$24.63995,700
2021-06-14$24.72$24.722,587,500
2021-06-11$25.03$25.031,554,400
2021-06-10$25.15$25.152,387,100
2021-06-09$24.70$24.701,194,800
2021-06-08$24.48$24.482,175,300
2021-06-07$23.50$23.502,903,300
2021-06-04$23.08$23.08956,800
2021-06-03$23.07$23.071,300,100
2021-06-02$23.30$23.301,563,100
2021-06-01$23.15$23.152,657,500
2021-05-28$22.67$22.671,252,400
2021-05-27$22.56$22.561,333,700
2021-05-26$22.31$22.311,861,100
2021-05-25$21.59$21.593,425,100
2021-05-24$22.14$22.144,597,700
2021-05-21$22.19$22.196,752,100
2021-05-20$21.92$21.922,185,000
2021-05-19$21.81$21.81981,900
2021-05-18$21.88$21.881,544,100
2021-05-17$22.08$22.08852,300
2021-05-14$22.26$22.261,645,800
2021-05-13$22.24$22.241,081,800
2021-05-12$22.44$22.441,946,000
2021-05-11$22.34$22.341,643,000
2021-05-10$21.65$21.653,055,300
2021-05-07$22.00$22.003,003,300
2021-05-06$22.01$22.011,867,100
2021-05-05$22.05$22.051,548,500
2021-05-04$22.30$22.301,799,200
2021-05-03$22.13$22.131,435,300
2021-04-30$22.01$22.011,585,200
2021-04-29$21.78$21.781,059,100
2021-04-28$21.77$21.771,680,300
2021-04-27$22.50$22.502,470,300
2021-04-26$22.47$22.472,653,700
2021-04-23$21.28$21.281,261,700
2021-04-22$20.92$20.921,574,100
2021-04-21$20.50$20.501,174,500
2021-04-20$20.16$20.161,305,800
2021-04-19$20.06$20.061,468,900
2021-04-16$19.87$19.871,318,700
2021-04-15$19.77$19.771,184,200
2021-04-14$19.23$19.231,668,600
2021-04-13$18.86$18.86666,000
2021-04-12$18.78$18.781,154,500
2021-04-09$19.02$19.021,249,800
2021-04-08$19.05$19.051,240,400
2021-04-07$19.07$19.07834,900
2021-04-06$19.11$19.11563,000
2021-04-05$19.26$19.26673,800
2021-04-01$19.15$19.15802,300
2021-03-31$18.68$18.681,249,800
2021-03-30$18.72$18.72612,900
2021-03-29$19.07$19.07858,300
2021-03-26$19.52$19.52770,000
2021-03-25$19.80$19.801,202,500
2021-03-24$19.43$19.431,399,900
2021-03-23$19.38$19.38824,300
2021-03-22$20.27$20.271,002,700
2021-03-19$20.05$20.052,007,500
2021-03-18$19.62$19.62874,600
2021-03-17$20.16$20.161,502,300
2021-03-16$19.75$19.751,040,600
2021-03-15$19.82$19.82809,400
2021-03-12$19.42$19.421,099,700
2021-03-11$19.48$19.481,397,200
2021-03-10$19.20$19.201,220,600
2021-03-09$19.65$19.651,300,600
2021-03-08$19.23$19.231,400,800
2021-03-05$19.28$19.281,528,900
2021-03-04$18.21$18.21979,800
2021-03-03$18.64$18.641,356,500
2021-03-02$19.19$19.191,176,700
2021-03-01$19.20$19.20793,900
2021-02-26$19.04$19.041,719,800
2021-02-25$19.44$19.44913,600
2021-02-24$19.88$19.88975,600
2021-02-23$19.65$19.651,277,200
2021-02-22$19.73$19.73902,900
2021-02-19$19.58$19.581,090,100
2021-02-18$19.66$19.66896,400
2021-02-17$19.97$19.971,070,000
2021-02-16$19.79$19.791,251,200
2021-02-12$20.22$20.222,157,300
2021-02-11$20.02$20.023,588,100
2021-02-10$22.93$22.931,691,300
2021-02-09$23.20$23.201,636,000
2021-02-08$23.04$23.042,238,300
2021-02-05$22.33$22.331,326,700
2021-02-04$21.76$21.76701,900
2021-02-03$22.01$22.011,025,400
2021-02-02$22.20$22.201,254,400
2021-02-01$21.77$21.77823,100
2021-01-29$20.99$20.991,383,700
2021-01-28$21.20$21.20877,600
2021-01-27$21.54$21.541,457,100
2021-01-26$21.69$21.69930,100
2021-01-25$22.87$22.872,049,500
2021-01-22$22.19$22.191,784,500
2021-01-21$21.47$21.471,234,700
2021-01-20$22.29$22.291,870,700
2021-01-19$22.85$22.851,343,500
2021-01-15$22.37$22.372,026,400
2021-01-14$22.00$22.001,006,600
2021-01-13$21.82$21.82891,600
2021-01-12$22.09$22.091,832,800
2021-01-11$21.46$21.461,323,400
2021-01-08$20.38$20.381,584,200
2021-01-07$20.59$20.593,343,500
2021-01-06$19.50$19.501,106,800
2021-01-05$19.50$19.501,083,200
2021-01-04$19.74$19.741,038,700