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 — 2011

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2011-12-30$17.36$17.36422,600
2011-12-29$17.44$17.44505,500
2011-12-28$17.20$17.20529,700
2011-12-27$17.68$17.68560,700
2011-12-23$17.54$17.54397,000
2011-12-22$17.38$17.38769,400
2011-12-21$17.19$17.191,017,900
2011-12-20$16.79$16.791,222,100
2011-12-19$15.74$15.741,289,300
2011-12-16$15.68$15.681,275,000
2011-12-15$15.57$15.57571,600
2011-12-14$15.18$15.18682,100
2011-12-13$15.37$15.37823,600
2011-12-12$15.56$15.56508,100
2011-12-09$15.83$15.83719,700
2011-12-08$15.06$15.06735,300
2011-12-07$15.75$15.75696,900
2011-12-06$15.74$15.74825,500
2011-12-05$15.65$15.65777,400
2011-12-02$14.86$14.86617,500
2011-12-01$15.41$15.41539,500
2011-11-30$15.29$15.29928,200
2011-11-29$14.36$14.36845,900
2011-11-28$14.55$14.55868,700
2011-11-25$13.88$13.88281,200
2011-11-23$14.32$14.32819,000
2011-11-22$14.97$14.97894,700
2011-11-21$14.89$14.89687,100
2011-11-18$15.00$15.00462,200
2011-11-17$15.21$15.21602,600
2011-11-16$15.52$15.52728,800
2011-11-15$16.07$16.07910,900
2011-11-14$16.00$16.00713,800
2011-11-11$15.93$15.93796,400
2011-11-10$15.45$15.45549,500
2011-11-09$15.78$15.781,034,500
2011-11-08$16.11$16.111,156,400
2011-11-07$15.92$15.92718,300
2011-11-04$16.12$16.121,489,700
2011-11-03$16.94$16.941,606,900
2011-11-02$17.47$17.471,005,200
2011-11-01$16.87$16.871,062,300
2011-10-31$17.49$17.49852,300
2011-10-28$18.03$18.031,120,000
2011-10-27$17.64$17.641,068,700
2011-10-26$17.11$17.11780,400
2011-10-25$16.60$16.60582,700
2011-10-24$17.16$17.16549,100
2011-10-21$17.17$17.17695,200
2011-10-20$16.46$16.46713,300
2011-10-19$16.31$16.31759,700
2011-10-18$16.45$16.45812,900
2011-10-17$16.13$16.131,212,100
2011-10-14$16.45$16.451,345,600
2011-10-13$15.75$15.75761,100
2011-10-12$15.16$15.16889,900
2011-10-11$15.27$15.27339,900
2011-10-10$15.36$15.36756,000
2011-10-07$14.56$14.56801,600
2011-10-06$14.91$14.91693,900
2011-10-05$14.60$14.60724,600
2011-10-04$14.51$14.511,652,400
2011-10-03$13.98$13.981,812,700
2011-09-30$15.25$15.25672,900
2011-09-29$15.37$15.37682,900
2011-09-28$15.55$15.55675,100
2011-09-27$16.06$16.06641,500
2011-09-26$15.96$15.96631,900
2011-09-23$15.55$15.55464,700
2011-09-22$15.01$15.01905,500
2011-09-21$15.53$15.53687,200
2011-09-20$16.18$16.18281,600
2011-09-19$16.32$16.32415,500
2011-09-16$16.57$16.57775,800
2011-09-15$16.52$16.52430,900
2011-09-14$16.18$16.18750,900
2011-09-13$16.08$16.08813,500
2011-09-12$16.25$16.25578,200
2011-09-09$16.24$16.24631,000
2011-09-08$16.86$16.86452,200
2011-09-07$17.06$17.06545,800
2011-09-06$16.55$16.55800,600
2011-09-02$16.56$16.56543,000
2011-09-01$16.97$16.971,104,600
2011-08-31$17.34$17.341,026,500
2011-08-30$17.37$17.371,531,100
2011-08-29$16.33$16.33667,600
2011-08-26$15.93$15.93482,200
2011-08-25$15.47$15.47790,500
2011-08-24$15.88$15.88968,000
2011-08-23$15.56$15.561,151,500
2011-08-22$14.63$14.631,403,100
2011-08-19$14.78$14.781,199,400
2011-08-18$14.30$14.301,048,600
2011-08-17$14.87$14.87801,800
2011-08-16$14.58$14.581,214,100
2011-08-15$14.85$14.85599,500
2011-08-12$14.67$14.67697,300
2011-08-11$14.39$14.39923,000
2011-08-10$13.91$13.911,689,200
2011-08-09$14.74$14.742,344,500
2011-08-08$14.12$14.122,145,400
2011-08-05$15.58$15.581,454,400
2011-08-04$14.82$14.821,644,400
2011-08-03$16.00$16.001,436,300
2011-08-02$16.43$16.431,204,300
2011-08-01$16.92$16.921,024,700
2011-07-29$17.24$17.24592,500
2011-07-28$17.37$17.37492,600
2011-07-27$17.55$17.55688,600
2011-07-26$18.07$18.07364,100
2011-07-25$18.16$18.16440,200
2011-07-22$18.57$18.57776,300
2011-07-21$18.85$18.85596,400
2011-07-20$18.56$18.56750,400
2011-07-19$18.97$18.97780,700
2011-07-18$18.92$18.921,565,300
2011-07-15$19.27$19.271,394,800
2011-07-14$19.09$19.09549,800
2011-07-13$19.24$19.241,159,000
2011-07-12$19.22$19.22777,200
2011-07-11$18.96$18.96925,400
2011-07-08$19.52$19.521,623,000
2011-07-07$19.23$19.23799,800
2011-07-06$18.70$18.70412,200
2011-07-05$18.88$18.88742,400
2011-07-01$19.04$19.041,258,500
2011-06-30$18.60$18.601,496,800
2011-06-29$17.92$17.92618,000
2011-06-28$17.97$17.97589,600
2011-06-27$17.77$17.77741,200
2011-06-24$17.31$17.313,017,900
2011-06-23$17.57$17.57868,600
2011-06-22$17.42$17.42679,200
2011-06-21$17.49$17.49559,700
2011-06-20$17.04$17.04776,500
2011-06-17$16.61$16.611,140,500
2011-06-16$16.69$16.69661,500
2011-06-15$16.67$16.67807,500
2011-06-14$17.01$17.01686,200
2011-06-13$17.05$17.05745,800
2011-06-10$17.24$17.24581,000
2011-06-09$17.91$17.91407,700
2011-06-08$17.88$17.88595,700
2011-06-07$18.09$18.09845,400
2011-06-06$17.83$17.83713,000
2011-06-03$17.67$17.67445,400
2011-06-02$18.08$18.08767,200
2011-06-01$17.87$17.871,207,200
2011-05-31$18.32$18.321,392,100
2011-05-27$18.16$18.16473,500
2011-05-26$17.98$17.98825,800
2011-05-25$17.91$17.911,129,600
2011-05-24$17.82$17.82888,500
2011-05-23$18.01$18.011,100,000
2011-05-20$18.11$18.111,702,200
2011-05-19$18.13$18.132,576,200
2011-05-18$17.95$17.951,515,200
2011-05-17$18.09$18.091,576,900
2011-05-16$18.03$18.031,708,900
2011-05-13$17.76$17.762,722,100
2011-05-12$17.02$17.022,100,000
2011-05-11$16.39$16.391,400,000
2011-05-10$15.98$15.982,490,900
2011-05-09$15.19$15.194,474,500
2011-05-06$14.47$14.47508,300
2011-05-05$14.11$14.11494,100
2011-05-04$13.82$13.82690,900
2011-05-03$14.46$14.46288,000
2011-05-02$14.57$14.57311,400
2011-04-29$14.42$14.42938,000
2011-04-28$14.44$14.44343,100
2011-04-27$13.97$13.97284,000
2011-04-26$13.90$13.90462,300
2011-04-25$13.88$13.88225,200
2011-04-21$13.90$13.90406,900
2011-04-20$13.71$13.71380,600
2011-04-19$13.79$13.79484,900
2011-04-18$13.90$13.90651,500
2011-04-15$14.00$14.00672,200
2011-04-14$13.41$13.41545,400
2011-04-13$13.57$13.57484,900
2011-04-12$13.91$13.91787,500
2011-04-11$13.46$13.46423,100
2011-04-08$13.07$13.07296,400
2011-04-07$13.23$13.23277,000
2011-04-06$13.24$13.24372,400
2011-04-05$13.33$13.33354,500
2011-04-04$13.29$13.29476,700
2011-04-01$13.06$13.06404,500
2011-03-31$12.95$12.95312,600
2011-03-30$12.77$12.77457,100
2011-03-29$12.55$12.55359,600
2011-03-28$12.20$12.20357,400
2011-03-25$12.14$12.14504,100
2011-03-24$12.40$12.40266,900
2011-03-23$12.21$12.21366,200
2011-03-22$12.37$12.37211,100
2011-03-21$12.37$12.37494,500
2011-03-18$12.48$12.482,462,400
2011-03-17$12.44$12.44778,000
2011-03-16$12.27$12.27673,800
2011-03-15$12.34$12.34716,900
2011-03-14$12.32$12.32459,600
2011-03-11$12.40$12.40518,700
2011-03-10$12.30$12.30574,800
2011-03-09$12.46$12.46381,600
2011-03-08$12.44$12.44704,900
2011-03-07$12.39$12.39609,100
2011-03-04$12.58$12.58848,600
2011-03-03$12.56$12.564,237,800
2011-03-02$14.10$14.10399,800
2011-03-01$13.94$13.941,078,800
2011-02-28$14.33$14.33544,200
2011-02-25$14.10$14.10307,800
2011-02-24$14.01$14.01538,400
2011-02-23$13.99$13.99513,500
2011-02-22$14.09$14.09698,900
2011-02-18$14.62$14.62676,000
2011-02-17$14.63$14.63538,600
2011-02-16$14.39$14.39643,600
2011-02-15$14.21$14.21778,400
2011-02-14$14.00$14.00835,700
2011-02-11$13.61$13.61309,600
2011-02-10$13.62$13.62438,400
2011-02-09$13.63$13.63512,400
2011-02-08$13.89$13.89788,400
2011-02-07$14.07$14.07768,300
2011-02-04$14.03$14.032,547,800
2011-02-03$12.78$12.78619,100
2011-02-02$12.96$12.96583,100
2011-02-01$13.08$13.08569,700
2011-01-31$12.91$12.91473,800
2011-01-28$12.79$12.79737,100
2011-01-27$13.30$13.30620,400
2011-01-26$13.02$13.02599,800
2011-01-25$12.97$12.97687,800
2011-01-24$12.66$12.66489,400
2011-01-21$12.55$12.55980,300
2011-01-20$12.77$12.771,130,300
2011-01-19$12.79$12.791,112,000
2011-01-18$13.35$13.351,581,500
2011-01-14$12.77$12.77533,100
2011-01-13$12.62$12.62383,900
2011-01-12$12.61$12.61244,500
2011-01-11$12.77$12.77541,100
2011-01-10$12.52$12.52516,000
2011-01-07$12.61$12.61453,600
2011-01-06$12.46$12.46284,900
2011-01-05$12.49$12.49500,200
2011-01-04$12.22$12.22451,600
2011-01-03$12.55$12.55482,600