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 — 2005

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2005-12-30$19.12$19.121,918,400
2005-12-29$19.65$19.659,995,400
2005-12-28$17.79$17.791,734,200
2005-12-27$17.88$17.88896,900
2005-12-23$18.19$18.191,553,800
2005-12-22$17.52$17.521,256,400
2005-12-21$17.92$17.921,282,900
2005-12-20$17.66$17.661,145,200
2005-12-19$17.85$17.851,580,800
2005-12-16$18.48$18.481,343,400
2005-12-15$18.31$18.31954,600
2005-12-14$17.99$17.99942,800
2005-12-13$17.67$17.671,216,600
2005-12-12$17.72$17.721,204,400
2005-12-09$18.41$18.41801,900
2005-12-08$18.59$18.591,576,600
2005-12-07$18.66$18.661,352,000
2005-12-06$18.42$18.421,080,600
2005-12-05$18.63$18.631,149,200
2005-12-02$18.56$18.561,003,300
2005-12-01$18.60$18.601,444,200
2005-11-30$18.18$18.181,108,700
2005-11-29$18.57$18.57809,100
2005-11-28$18.46$18.461,283,200
2005-11-25$18.85$18.85193,700
2005-11-23$19.15$19.15648,500
2005-11-22$19.66$19.661,602,300
2005-11-21$18.93$18.93793,000
2005-11-18$18.51$18.51727,000
2005-11-17$18.25$18.25819,600
2005-11-16$17.74$17.74718,300
2005-11-15$17.99$17.99776,400
2005-11-14$18.10$18.10451,100
2005-11-11$18.49$18.49501,900
2005-11-10$18.39$18.39798,900
2005-11-09$18.19$18.191,338,900
2005-11-08$18.19$18.19805,400
2005-11-07$18.10$18.101,872,000
2005-11-04$18.99$18.992,794,300
2005-11-03$16.88$16.881,111,800
2005-11-02$16.86$16.86516,800
2005-11-01$16.42$16.42611,800
2005-10-31$16.29$16.29592,300
2005-10-28$15.88$15.88632,200
2005-10-27$15.71$15.71867,200
2005-10-26$16.57$16.57743,300
2005-10-25$16.36$16.36467,900
2005-10-24$16.33$16.33897,000
2005-10-21$15.41$15.41548,600
2005-10-20$15.34$15.34764,800
2005-10-19$15.64$15.641,574,400
2005-10-18$15.46$15.46795,800
2005-10-17$15.94$15.94646,200
2005-10-14$15.98$15.98878,900
2005-10-13$15.54$15.541,258,100
2005-10-12$14.89$14.891,672,200
2005-10-11$15.54$15.541,385,400
2005-10-10$16.05$16.051,099,100
2005-10-07$15.81$15.811,048,500
2005-10-06$15.96$15.961,897,900
2005-10-05$16.92$16.921,753,100
2005-10-04$17.25$17.25968,300
2005-10-03$17.08$17.081,569,400
2005-09-30$16.80$16.80665,800
2005-09-29$16.95$16.95599,900
2005-09-28$16.86$16.86740,900
2005-09-27$16.95$16.951,208,200
2005-09-26$17.00$17.00622,400
2005-09-23$16.79$16.79733,900
2005-09-22$16.93$16.931,278,500
2005-09-21$17.00$17.002,873,300
2005-09-20$18.67$18.671,112,400
2005-09-19$18.75$18.75986,300
2005-09-16$18.64$18.64943,600
2005-09-15$18.17$18.17835,800
2005-09-14$18.03$18.03686,200
2005-09-13$18.39$18.39733,800
2005-09-12$18.84$18.84814,000
2005-09-09$18.69$18.691,716,400
2005-09-08$18.60$18.601,748,900
2005-09-07$19.16$19.161,800,100
2005-09-06$19.08$19.081,332,400
2005-09-02$18.27$18.27514,200
2005-09-01$18.58$18.58973,000
2005-08-31$18.78$18.781,468,500
2005-08-30$17.83$17.83754,100
2005-08-29$17.90$17.90793,300
2005-08-26$17.28$17.28878,700
2005-08-25$17.74$17.741,912,800
2005-08-24$17.97$17.972,359,900
2005-08-23$17.67$17.677,509,800
2005-08-22$15.83$15.83808,100
2005-08-19$15.24$15.24559,000
2005-08-18$15.40$15.40551,200
2005-08-17$15.47$15.47473,500
2005-08-16$15.44$15.44368,700
2005-08-15$15.84$15.84463,300
2005-08-12$15.76$15.76682,100
2005-08-11$15.60$15.60839,800
2005-08-10$15.82$15.82601,600
2005-08-09$15.80$15.80915,500
2005-08-08$15.45$15.451,784,000
2005-08-05$16.03$16.031,779,400
2005-08-04$15.80$15.80518,900
2005-08-03$16.35$16.35540,100
2005-08-02$16.40$16.401,222,600
2005-08-01$16.06$16.061,051,500
2005-07-29$15.50$15.50705,000
2005-07-28$15.40$15.40715,500
2005-07-27$15.45$15.45579,200
2005-07-26$15.81$15.81663,900
2005-07-25$15.49$15.49435,800
2005-07-22$15.85$15.85564,600
2005-07-21$15.67$15.67964,300
2005-07-20$15.82$15.822,363,900
2005-07-19$14.86$14.86917,300
2005-07-18$14.36$14.36588,000
2005-07-15$14.40$14.40882,300
2005-07-14$14.03$14.03632,000
2005-07-13$13.97$13.97840,600
2005-07-12$14.21$14.211,143,100
2005-07-11$14.47$14.472,312,200
2005-07-08$14.50$14.501,282,400
2005-07-07$13.79$13.79942,800
2005-07-06$13.66$13.66918,400
2005-07-05$13.63$13.63735,200
2005-07-01$13.15$13.15714,900
2005-06-30$13.22$13.22730,900
2005-06-29$13.37$13.371,324,100
2005-06-28$13.47$13.471,064,900
2005-06-27$13.17$13.171,376,200
2005-06-24$13.21$13.214,839,200
2005-06-23$13.10$13.101,163,900
2005-06-22$13.04$13.04887,200
2005-06-21$12.89$12.89671,800
2005-06-20$12.91$12.91773,600
2005-06-17$12.87$12.872,246,100
2005-06-16$13.25$13.25968,300
2005-06-15$12.94$12.941,063,400
2005-06-14$12.94$12.942,247,500
2005-06-13$12.25$12.251,173,900
2005-06-10$11.99$11.99625,400
2005-06-09$11.79$11.79874,600
2005-06-08$11.46$11.46804,100
2005-06-07$11.34$11.34663,700
2005-06-06$11.28$11.28406,100
2005-06-03$11.45$11.45946,200
2005-06-02$11.78$11.78414,100
2005-06-01$11.78$11.78845,700
2005-05-31$11.60$11.60832,900
2005-05-27$11.68$11.682,908,800
2005-05-26$10.85$10.85775,900
2005-05-25$10.73$10.73721,300
2005-05-24$11.12$11.121,219,400
2005-05-23$11.46$11.461,010,400
2005-05-20$11.45$11.451,221,800
2005-05-19$11.66$11.66651,100
2005-05-18$11.42$11.42637,500
2005-05-17$11.15$11.15654,100
2005-05-16$11.40$11.40429,100
2005-05-13$11.24$11.24909,800
2005-05-12$11.55$11.55543,500
2005-05-11$11.72$11.72496,800
2005-05-10$11.75$11.75805,600
2005-05-09$11.85$11.85447,200
2005-05-06$11.77$11.77558,100
2005-05-05$11.58$11.581,383,200
2005-05-04$11.67$11.67855,100
2005-05-03$11.48$11.481,118,900
2005-05-02$11.46$11.461,106,500
2005-04-29$11.25$11.25802,900
2005-04-28$11.11$11.11540,000
2005-04-27$11.62$11.62869,500
2005-04-26$11.84$11.84765,900
2005-04-25$12.14$12.14419,600
2005-04-22$12.04$12.041,312,500
2005-04-21$12.13$12.13826,400
2005-04-20$11.83$11.83688,200
2005-04-19$11.55$11.551,270,400
2005-04-18$11.54$11.541,066,400
2005-04-15$11.66$11.661,407,700
2005-04-14$11.26$11.26941,400
2005-04-13$11.30$11.301,109,400
2005-04-12$11.57$11.571,153,300
2005-04-11$11.12$11.12856,600
2005-04-08$11.01$11.01889,100
2005-04-07$11.34$11.341,001,800
2005-04-06$11.33$11.333,028,600
2005-04-05$10.44$10.441,134,400
2005-04-04$10.05$10.051,232,600
2005-04-01$10.01$10.011,419,200
2005-03-31$10.38$10.38748,400
2005-03-30$10.75$10.75465,200
2005-03-29$10.47$10.47855,800
2005-03-28$10.88$10.88505,100
2005-03-24$11.15$11.151,062,400
2005-03-23$10.63$10.63544,600
2005-03-22$10.58$10.581,063,100
2005-03-21$10.26$10.26289,400
2005-03-18$10.30$10.30718,200
2005-03-17$10.43$10.431,106,900
2005-03-16$10.38$10.38696,600
2005-03-15$10.40$10.401,546,800
2005-03-14$10.83$10.83749,200
2005-03-11$10.41$10.41693,700
2005-03-10$10.55$10.551,176,400
2005-03-09$10.31$10.311,514,000
2005-03-08$10.83$10.83651,300
2005-03-07$11.17$11.17903,000
2005-03-04$11.25$11.25943,500
2005-03-03$11.67$11.671,069,600
2005-03-02$11.49$11.49558,800
2005-03-01$11.67$11.67671,000
2005-02-28$11.67$11.67630,900
2005-02-25$12.11$12.11441,000
2005-02-24$11.75$11.75840,700
2005-02-23$11.42$11.42712,500
2005-02-22$11.12$11.121,103,400
2005-02-18$11.48$11.48352,700
2005-02-17$11.57$11.57697,400
2005-02-16$11.80$11.80833,400
2005-02-15$11.66$11.66557,800
2005-02-14$11.56$11.56836,200
2005-02-11$11.78$11.78821,900
2005-02-10$11.80$11.80737,000
2005-02-09$11.85$11.85888,700
2005-02-08$12.34$12.34653,100
2005-02-07$12.51$12.511,093,500
2005-02-04$12.60$12.602,784,700
2005-02-03$12.83$12.83421,800
2005-02-02$13.05$13.05578,300
2005-02-01$13.22$13.22763,700
2005-01-31$12.67$12.67415,900
2005-01-28$12.47$12.47794,700
2005-01-27$12.74$12.74517,600
2005-01-26$12.68$12.68387,700
2005-01-25$12.43$12.43527,400
2005-01-24$12.55$12.55675,600
2005-01-21$12.86$12.86821,400
2005-01-20$13.21$13.21616,900
2005-01-19$13.32$13.321,164,700
2005-01-18$13.17$13.17742,400
2005-01-14$12.59$12.59990,100
2005-01-13$12.58$12.58799,600
2005-01-12$13.04$13.041,304,800
2005-01-11$13.00$13.00901,500
2005-01-10$12.90$12.90466,000
2005-01-07$12.91$12.91550,000
2005-01-06$13.24$13.24620,900
2005-01-05$13.01$13.01949,900
2005-01-04$13.61$13.61826,500
2005-01-03$14.01$14.01610,700