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 — 2008

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2008-12-31$10.65$10.65806,500
2008-12-30$10.42$10.42599,300
2008-12-29$10.17$10.17608,200
2008-12-26$10.42$10.42198,300
2008-12-24$10.38$10.38329,200
2008-12-23$10.13$10.13658,600
2008-12-22$10.09$10.091,289,300
2008-12-19$9.83$9.834,304,900
2008-12-18$10.30$10.301,233,100
2008-12-17$10.42$10.42849,800
2008-12-16$10.34$10.34869,100
2008-12-15$9.74$9.74741,800
2008-12-12$10.08$10.081,071,000
2008-12-11$9.94$9.942,943,600
2008-12-10$8.70$8.70767,100
2008-12-09$8.55$8.551,173,400
2008-12-08$9.54$9.542,401,000
2008-12-05$7.82$7.821,148,200
2008-12-04$7.68$7.681,734,400
2008-12-03$7.21$7.211,235,400
2008-12-02$7.37$7.371,379,000
2008-12-01$6.76$6.761,102,100
2008-11-28$7.38$7.38248,200
2008-11-26$7.45$7.45842,000
2008-11-25$6.95$6.95894,200
2008-11-24$6.88$6.881,112,700
2008-11-21$6.37$6.371,623,700
2008-11-20$6.10$6.101,150,900
2008-11-19$6.58$6.581,031,700
2008-11-18$7.51$7.51730,000
2008-11-17$7.64$7.64974,200
2008-11-14$7.65$7.651,274,000
2008-11-13$7.63$7.631,807,000
2008-11-12$7.42$7.42996,000
2008-11-11$7.89$7.89816,400
2008-11-10$8.12$8.121,800,100
2008-11-07$8.00$8.001,019,700
2008-11-06$8.07$8.07763,300
2008-11-05$8.71$8.71864,300
2008-11-04$9.11$9.112,464,800
2008-11-03$10.10$10.10648,200
2008-10-31$9.88$9.88813,300
2008-10-30$9.59$9.59675,400
2008-10-29$9.17$9.171,119,400
2008-10-28$9.34$9.34866,500
2008-10-27$8.75$8.75973,000
2008-10-24$9.94$9.941,114,400
2008-10-23$10.54$10.541,310,500
2008-10-22$10.67$10.67938,000
2008-10-21$11.05$11.05691,500
2008-10-20$10.82$10.82611,700
2008-10-17$10.13$10.131,218,700
2008-10-16$10.42$10.421,345,400
2008-10-15$9.67$9.671,351,800
2008-10-14$11.22$11.22970,700
2008-10-13$11.27$11.27920,000
2008-10-10$9.94$9.942,004,000
2008-10-09$10.02$10.021,189,400
2008-10-08$11.08$11.081,656,600
2008-10-07$11.44$11.441,256,800
2008-10-06$12.14$12.141,161,700
2008-10-03$12.74$12.74814,500
2008-10-02$13.01$13.01834,300
2008-10-01$13.26$13.26888,100
2008-09-30$13.30$13.30822,100
2008-09-29$13.35$13.351,409,700
2008-09-26$13.51$13.511,384,300
2008-09-25$13.20$13.20858,700
2008-09-24$12.91$12.911,199,600
2008-09-23$12.90$12.90913,800
2008-09-22$12.54$12.54989,100
2008-09-19$13.08$13.083,111,300
2008-09-18$12.37$12.373,014,200
2008-09-17$11.97$11.972,142,900
2008-09-16$12.79$12.791,422,900
2008-09-15$12.47$12.471,372,500
2008-09-12$12.99$12.991,079,300
2008-09-11$13.32$13.321,419,900
2008-09-10$13.25$13.251,452,600
2008-09-09$13.17$13.171,273,700
2008-09-08$13.56$13.562,010,500
2008-09-05$13.43$13.431,545,900
2008-09-04$13.65$13.651,622,500
2008-09-03$13.96$13.965,076,800
2008-09-02$13.72$13.722,335,800
2008-08-29$13.37$13.371,306,800
2008-08-28$13.56$13.561,749,400
2008-08-27$12.90$12.904,542,800
2008-08-26$14.60$14.60854,800
2008-08-25$14.64$14.64823,000
2008-08-22$14.98$14.98960,900
2008-08-21$14.75$14.751,641,800
2008-08-20$14.81$14.812,526,100
2008-08-19$14.41$14.412,926,000
2008-08-18$14.73$14.733,358,700
2008-08-15$16.38$16.381,311,300
2008-08-14$16.23$16.232,400,400
2008-08-13$15.99$15.991,701,200
2008-08-12$16.45$16.451,644,500
2008-08-11$16.89$16.891,864,000
2008-08-08$16.05$16.052,482,700
2008-08-07$14.51$14.511,906,100
2008-08-06$15.43$15.43995,600
2008-08-05$15.41$15.411,245,700
2008-08-04$15.14$15.141,109,400
2008-08-01$15.30$15.301,325,500
2008-07-31$15.75$15.751,174,800
2008-07-30$15.22$15.22665,300
2008-07-29$15.25$15.25921,700
2008-07-28$15.12$15.12925,900
2008-07-25$15.35$15.35733,400
2008-07-24$14.91$14.91761,500
2008-07-23$15.08$15.08787,100
2008-07-22$15.15$15.15896,900
2008-07-21$14.91$14.911,473,100
2008-07-18$14.44$14.441,016,800
2008-07-17$14.58$14.581,964,000
2008-07-16$14.29$14.291,298,800
2008-07-15$13.85$13.851,034,800
2008-07-14$13.73$13.73999,100
2008-07-11$13.72$13.721,103,500
2008-07-10$13.31$13.31920,100
2008-07-09$12.93$12.931,207,300
2008-07-08$13.22$13.221,199,700
2008-07-07$12.36$12.36913,100
2008-07-03$12.33$12.33505,600
2008-07-02$12.53$12.531,238,800
2008-07-01$12.49$12.491,454,600
2008-06-30$12.36$12.362,159,800
2008-06-27$12.70$12.701,378,600
2008-06-26$12.64$12.64878,500
2008-06-25$12.68$12.68917,200
2008-06-24$12.29$12.291,083,200
2008-06-23$12.24$12.241,445,200
2008-06-20$12.89$12.891,796,500
2008-06-19$12.98$12.981,370,400
2008-06-18$12.54$12.541,488,600
2008-06-17$12.84$12.841,286,900
2008-06-16$12.59$12.592,430,000
2008-06-13$11.90$11.90577,800
2008-06-12$11.80$11.80861,300
2008-06-11$11.89$11.891,633,600
2008-06-10$12.48$12.481,346,600
2008-06-09$12.36$12.361,522,800
2008-06-06$12.57$12.571,332,800
2008-06-05$13.02$13.021,285,400
2008-06-04$12.48$12.481,243,000
2008-06-03$12.06$12.062,151,800
2008-06-02$12.16$12.161,351,100
2008-05-30$12.67$12.671,319,000
2008-05-29$12.78$12.781,329,700
2008-05-28$12.13$12.131,746,200
2008-05-27$11.95$11.952,385,300
2008-05-23$12.75$12.754,674,800
2008-05-22$13.62$13.621,344,200
2008-05-21$13.05$13.05941,100
2008-05-20$13.42$13.42694,400
2008-05-19$13.51$13.51804,400
2008-05-16$13.75$13.751,189,600
2008-05-15$13.28$13.28607,000
2008-05-14$13.20$13.20540,100
2008-05-13$13.30$13.30532,100
2008-05-12$13.30$13.30665,200
2008-05-09$12.98$12.98653,900
2008-05-08$13.02$13.021,046,600
2008-05-07$12.79$12.791,211,300
2008-05-06$13.06$13.061,431,700
2008-05-05$12.89$12.891,055,400
2008-05-02$12.85$12.852,081,200
2008-05-01$12.84$12.841,159,800
2008-04-30$12.43$12.431,977,000
2008-04-29$12.01$12.011,346,500
2008-04-28$12.10$12.101,277,800
2008-04-25$11.43$11.43850,800
2008-04-24$11.53$11.53680,200
2008-04-23$11.30$11.30899,000
2008-04-22$11.27$11.271,057,400
2008-04-21$11.38$11.38741,900
2008-04-18$11.41$11.41999,400
2008-04-17$11.13$11.13528,200
2008-04-16$11.41$11.411,175,900
2008-04-15$11.04$11.041,086,200
2008-04-14$11.19$11.19825,700
2008-04-11$11.11$11.11975,400
2008-04-10$11.33$11.331,406,600
2008-04-09$10.95$10.952,265,000
2008-04-08$11.69$11.69614,300
2008-04-07$11.66$11.66538,900
2008-04-04$11.81$11.81594,500
2008-04-03$11.87$11.872,814,500
2008-04-02$12.03$12.031,248,700
2008-04-01$12.06$12.061,072,400
2008-03-31$11.88$11.881,211,400
2008-03-28$11.08$11.08736,700
2008-03-27$11.50$11.50786,900
2008-03-26$11.45$11.45695,200
2008-03-25$11.49$11.491,036,800
2008-03-24$11.66$11.66966,400
2008-03-20$11.09$11.092,522,200
2008-03-19$10.82$10.821,405,200
2008-03-18$10.85$10.851,536,300
2008-03-17$10.81$10.812,206,200
2008-03-14$11.12$11.122,042,400
2008-03-13$11.21$11.211,494,300
2008-03-12$10.96$10.961,632,100
2008-03-11$11.18$11.182,094,100
2008-03-10$10.78$10.783,546,600
2008-03-07$11.26$11.266,601,400
2008-03-06$12.40$12.401,010,300
2008-03-05$12.57$12.571,173,100
2008-03-04$12.64$12.641,762,600
2008-03-03$12.73$12.731,286,600
2008-02-29$12.94$12.941,471,500
2008-02-28$13.40$13.401,516,100
2008-02-27$13.15$13.15506,000
2008-02-26$13.23$13.231,459,500
2008-02-25$13.16$13.16934,100
2008-02-22$13.04$13.041,197,800
2008-02-21$13.16$13.161,191,200
2008-02-20$13.18$13.181,060,200
2008-02-19$13.04$13.041,170,400
2008-02-15$12.89$12.89955,200
2008-02-14$13.12$13.121,100,300
2008-02-13$13.39$13.39813,600
2008-02-12$13.32$13.322,518,400
2008-02-11$13.43$13.431,399,200
2008-02-08$13.57$13.571,853,600
2008-02-07$13.68$13.68956,400
2008-02-06$13.34$13.34994,900
2008-02-05$13.47$13.471,250,800
2008-02-04$13.69$13.69866,800
2008-02-01$13.70$13.701,178,300
2008-01-31$13.32$13.321,225,000
2008-01-30$13.33$13.33744,800
2008-01-29$13.64$13.641,085,300
2008-01-28$13.75$13.75569,000
2008-01-25$13.61$13.61870,200
2008-01-24$13.76$13.761,052,500
2008-01-23$14.05$14.051,385,400
2008-01-22$13.99$13.991,788,500
2008-01-18$14.20$14.201,525,800
2008-01-17$14.55$14.551,697,500
2008-01-16$15.03$15.031,173,600
2008-01-15$14.77$14.771,578,100
2008-01-14$15.33$15.33751,400
2008-01-11$15.38$15.38665,400
2008-01-10$15.74$15.74808,500
2008-01-09$15.39$15.391,028,000
2008-01-08$15.19$15.191,061,600
2008-01-07$15.46$15.461,108,000
2008-01-04$14.79$14.79826,100
2008-01-03$14.90$14.901,063,800
2008-01-02$15.10$15.101,324,500