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 — 2009

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2009-12-31$9.41$9.41386,900
2009-12-30$9.56$9.561,072,800
2009-12-29$9.56$9.56576,800
2009-12-28$9.60$9.60434,300
2009-12-24$9.57$9.57430,900
2009-12-23$9.57$9.571,743,100
2009-12-22$9.88$9.881,524,000
2009-12-21$9.37$9.371,359,000
2009-12-18$8.93$8.931,733,700
2009-12-17$8.83$8.831,871,000
2009-12-16$8.68$8.681,548,800
2009-12-15$8.81$8.811,101,800
2009-12-14$8.89$8.89713,300
2009-12-11$8.84$8.841,093,000
2009-12-10$8.75$8.75702,400
2009-12-09$8.64$8.64669,700
2009-12-08$8.82$8.821,361,500
2009-12-07$8.90$8.90666,000
2009-12-04$9.06$9.06835,300
2009-12-03$8.84$8.84679,600
2009-12-02$9.06$9.06885,800
2009-12-01$9.11$9.111,962,600
2009-11-30$8.98$8.981,120,300
2009-11-27$8.63$8.63516,500
2009-11-25$8.91$8.91944,400
2009-11-24$8.63$8.63826,000
2009-11-23$8.65$8.651,023,200
2009-11-20$8.66$8.66514,200
2009-11-19$8.91$8.91999,300
2009-11-18$9.21$9.21913,200
2009-11-17$9.36$9.362,547,600
2009-11-16$8.18$8.181,550,900
2009-11-13$7.91$7.91652,300
2009-11-12$7.93$7.93872,100
2009-11-11$7.89$7.89828,900
2009-11-10$7.58$7.58465,300
2009-11-09$7.63$7.63892,300
2009-11-06$7.70$7.701,747,600
2009-11-05$8.09$8.09531,100
2009-11-04$7.83$7.83937,100
2009-11-03$8.13$8.13548,900
2009-11-02$7.98$7.98579,500
2009-10-30$7.97$7.971,034,000
2009-10-29$8.19$8.19648,900
2009-10-28$8.26$8.261,007,700
2009-10-27$8.41$8.41865,300
2009-10-26$8.46$8.46529,600
2009-10-23$8.64$8.64948,900
2009-10-22$8.89$8.89441,400
2009-10-21$8.72$8.72692,400
2009-10-20$8.85$8.85398,100
2009-10-19$9.02$9.02584,700
2009-10-16$8.99$8.99563,600
2009-10-15$9.12$9.12860,000
2009-10-14$8.88$8.881,170,900
2009-10-13$8.62$8.62761,400
2009-10-12$8.59$8.59374,400
2009-10-09$8.69$8.69821,800
2009-10-08$8.72$8.72973,000
2009-10-07$8.84$8.84907,000
2009-10-06$8.98$8.98353,400
2009-10-05$8.79$8.79529,200
2009-10-02$8.80$8.801,255,400
2009-10-01$8.80$8.80646,300
2009-09-30$9.19$9.19634,600
2009-09-29$9.45$9.45887,300
2009-09-28$9.33$9.33714,500
2009-09-25$9.20$9.20800,800
2009-09-24$9.45$9.45645,900
2009-09-23$9.71$9.71662,200
2009-09-22$9.89$9.89665,000
2009-09-21$10.04$10.04366,300
2009-09-18$9.89$9.89997,600
2009-09-17$9.96$9.96758,000
2009-09-16$9.88$9.88753,300
2009-09-15$9.68$9.68395,700
2009-09-14$9.69$9.69315,700
2009-09-11$9.48$9.48695,100
2009-09-10$9.41$9.41319,700
2009-09-09$9.45$9.45481,900
2009-09-08$9.51$9.51516,400
2009-09-04$9.22$9.22426,400
2009-09-03$9.02$9.02899,200
2009-09-02$8.98$8.982,588,300
2009-09-01$8.75$8.751,046,800
2009-08-31$9.05$9.05606,700
2009-08-28$9.37$9.37799,900
2009-08-27$9.55$9.551,993,000
2009-08-26$10.37$10.37307,900
2009-08-25$10.35$10.35885,200
2009-08-24$10.40$10.40393,100
2009-08-21$10.41$10.41518,200
2009-08-20$10.42$10.42826,400
2009-08-19$10.30$10.30651,900
2009-08-18$9.81$9.81590,200
2009-08-17$9.46$9.46426,900
2009-08-14$9.55$9.55620,800
2009-08-13$9.94$9.94511,300
2009-08-12$10.05$10.05674,500
2009-08-11$9.94$9.94519,900
2009-08-10$10.28$10.28789,900
2009-08-07$10.55$10.55750,200
2009-08-06$10.52$10.52642,400
2009-08-05$10.73$10.73836,100
2009-08-04$11.20$11.20471,100
2009-08-03$11.15$11.151,396,500
2009-07-31$10.32$10.321,698,100
2009-07-30$10.87$10.87821,600
2009-07-29$11.04$11.04554,300
2009-07-28$11.28$11.28509,600
2009-07-27$11.65$11.65373,600
2009-07-24$11.61$11.61446,500
2009-07-23$11.62$11.62845,500
2009-07-22$11.03$11.03566,700
2009-07-21$10.73$10.73498,800
2009-07-20$10.75$10.75351,300
2009-07-17$10.47$10.47498,400
2009-07-16$10.51$10.51681,200
2009-07-15$10.53$10.531,079,200
2009-07-14$10.18$10.18389,400
2009-07-13$10.17$10.17429,900
2009-07-10$10.16$10.16504,100
2009-07-09$10.19$10.19397,500
2009-07-08$10.23$10.23842,300
2009-07-07$10.26$10.26322,300
2009-07-06$10.47$10.47672,900
2009-07-02$10.46$10.46858,500
2009-07-01$11.04$11.04444,500
2009-06-30$10.82$10.82813,900
2009-06-29$10.88$10.88887,700
2009-06-26$11.20$11.201,054,600
2009-06-25$10.90$10.901,345,200
2009-06-24$10.32$10.321,225,200
2009-06-23$9.84$9.841,098,200
2009-06-22$10.06$10.061,333,400
2009-06-19$9.92$9.921,719,000
2009-06-18$9.62$9.62948,200
2009-06-17$9.58$9.58860,600
2009-06-16$9.36$9.361,747,200
2009-06-15$9.10$9.10988,800
2009-06-12$9.28$9.28743,500
2009-06-11$9.10$9.101,238,100
2009-06-10$8.71$8.711,217,500
2009-06-09$8.61$8.61492,800
2009-06-08$8.55$8.551,179,100
2009-06-05$8.50$8.501,777,100
2009-06-04$8.20$8.201,658,600
2009-06-03$8.06$8.061,358,100
2009-06-02$7.99$7.993,561,900
2009-06-01$8.11$8.111,562,500
2009-05-29$8.12$8.121,171,000
2009-05-28$8.25$8.25769,500
2009-05-27$8.33$8.331,376,600
2009-05-26$8.55$8.55981,700
2009-05-22$8.25$8.251,158,200
2009-05-21$8.50$8.50678,900
2009-05-20$8.81$8.81785,100
2009-05-19$8.81$8.81658,100
2009-05-18$8.75$8.75692,300
2009-05-15$8.62$8.62704,200
2009-05-14$8.63$8.63739,900
2009-05-13$8.46$8.461,055,000
2009-05-12$8.81$8.81785,700
2009-05-11$9.06$9.06932,300
2009-05-08$9.00$9.00896,300
2009-05-07$8.73$8.73981,400
2009-05-06$8.59$8.591,477,700
2009-05-05$8.75$8.754,159,000
2009-05-04$7.85$7.851,214,600
2009-05-01$7.64$7.64718,100
2009-04-30$7.65$7.65920,400
2009-04-29$7.79$7.79781,600
2009-04-28$7.56$7.56883,100
2009-04-27$7.61$7.61965,600
2009-04-24$7.73$7.73905,100
2009-04-23$7.60$7.601,459,500
2009-04-22$7.75$7.751,048,600
2009-04-21$7.88$7.88852,100
2009-04-20$7.68$7.681,168,300
2009-04-17$8.10$8.101,207,900
2009-04-16$8.37$8.371,140,600
2009-04-15$8.45$8.451,749,200
2009-04-14$8.70$8.701,136,100
2009-04-13$8.95$8.951,567,400
2009-04-09$8.50$8.501,007,800
2009-04-08$8.44$8.442,064,200
2009-04-07$8.39$8.392,962,000
2009-04-06$8.86$8.862,128,600
2009-04-03$9.49$9.494,302,400
2009-04-02$11.41$11.412,885,900
2009-04-01$11.96$11.961,727,000
2009-03-31$12.13$12.131,850,300
2009-03-30$11.82$11.82680,300
2009-03-27$12.10$12.101,451,000
2009-03-26$13.13$13.132,361,800
2009-03-25$11.55$11.55898,100
2009-03-24$11.44$11.44750,300
2009-03-23$11.76$11.761,354,300
2009-03-20$11.03$11.033,908,300
2009-03-19$10.61$10.61629,500
2009-03-18$10.52$10.52640,500
2009-03-17$10.05$10.05568,600
2009-03-16$9.56$9.56483,400
2009-03-13$10.05$10.05392,400
2009-03-12$9.91$9.91754,300
2009-03-11$8.84$8.84521,100
2009-03-10$9.01$9.01921,600
2009-03-09$8.35$8.35560,300
2009-03-06$8.49$8.49620,600
2009-03-05$8.40$8.40876,600
2009-03-04$8.97$8.97715,300
2009-03-03$8.92$8.921,389,500
2009-03-02$9.19$9.191,294,400
2009-02-27$10.08$10.08869,600
2009-02-26$10.66$10.66760,200
2009-02-25$11.19$11.19857,000
2009-02-24$11.39$11.39927,700
2009-02-23$10.93$10.931,097,100
2009-02-20$11.16$11.161,000,100
2009-02-19$11.30$11.30860,500
2009-02-18$11.09$11.09977,200
2009-02-17$11.24$11.24842,700
2009-02-13$11.84$11.84759,700
2009-02-12$11.73$11.73849,500
2009-02-11$11.32$11.32957,100
2009-02-10$11.33$11.331,096,300
2009-02-09$11.50$11.50718,800
2009-02-06$11.51$11.511,292,900
2009-02-05$11.65$11.651,717,700
2009-02-04$11.98$11.981,296,100
2009-02-03$11.91$11.91574,200
2009-02-02$11.76$11.76708,000
2009-01-30$11.47$11.47575,000
2009-01-29$11.63$11.63681,400
2009-01-28$11.98$11.98903,600
2009-01-27$11.56$11.56641,700
2009-01-26$10.85$10.85465,000
2009-01-23$10.71$10.71726,700
2009-01-22$10.47$10.47599,100
2009-01-21$10.78$10.78834,700
2009-01-20$9.97$9.97525,600
2009-01-16$10.88$10.88555,600
2009-01-15$11.11$11.11777,100
2009-01-14$10.75$10.75875,700
2009-01-13$10.62$10.621,214,000
2009-01-12$10.02$10.02344,900
2009-01-09$10.27$10.27650,400
2009-01-08$10.90$10.90596,700
2009-01-07$10.71$10.71601,500
2009-01-06$10.70$10.70783,800
2009-01-05$10.73$10.73597,500
2009-01-02$10.71$10.71568,800