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 — 1998

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
1998-12-31$11.09$11.09212,800
1998-12-30$11.38$11.38321,200
1998-12-29$11.53$11.53744,000
1998-12-28$10.88$10.88132,200
1998-12-24$10.75$10.75350,400
1998-12-23$11.25$11.25394,200
1998-12-22$10.88$10.88548,200
1998-12-21$10.63$10.632,568,800
1998-12-18$9.38$9.3894,400
1998-12-17$9.28$9.2856,200
1998-12-16$9.41$9.41201,400
1998-12-15$9.31$9.31165,800
1998-12-14$8.56$8.56136,600
1998-12-11$8.81$8.81193,400
1998-12-10$8.94$8.94144,200
1998-12-09$9.06$9.06206,200
1998-12-08$8.72$8.72389,800
1998-12-07$8.94$8.94559,400
1998-12-04$9.50$9.50270,400
1998-12-03$9.31$9.31293,400
1998-12-02$9.13$9.13225,000
1998-12-01$9.06$9.06398,800
1998-11-30$9.19$9.19557,200
1998-11-27$9.88$9.8868,200
1998-11-25$9.75$9.75220,200
1998-11-24$10.28$10.28356,600
1998-11-23$10.47$10.47158,200
1998-11-20$9.97$9.97158,600
1998-11-19$10.00$10.00265,400
1998-11-18$9.88$9.88247,200
1998-11-17$9.81$9.81307,800
1998-11-16$9.94$9.94341,800
1998-11-13$9.63$9.63397,600
1998-11-12$9.63$9.63749,400
1998-11-11$9.75$9.75787,000
1998-11-10$10.25$10.25248,000
1998-11-09$10.69$10.69429,200
1998-11-06$10.50$10.50477,800
1998-11-05$10.25$10.25758,400
1998-11-04$10.41$10.41536,000
1998-11-03$10.06$10.061,100,200
1998-11-02$9.94$9.941,066,800
1998-10-30$9.75$9.75528,800
1998-10-29$9.00$9.00220,800
1998-10-28$9.00$9.00507,800
1998-10-27$8.81$8.81561,800
1998-10-26$8.97$8.97883,400
1998-10-23$9.03$9.031,386,800
1998-10-22$9.66$9.663,194,200
1998-10-21$7.25$7.25201,600
1998-10-20$7.44$7.44426,400
1998-10-19$7.34$7.34883,400
1998-10-16$6.88$6.881,017,800
1998-10-15$6.09$6.09469,200
1998-10-14$6.28$6.28279,200
1998-10-13$5.88$5.88224,400
1998-10-12$5.69$5.69396,000
1998-10-09$6.13$6.13423,600
1998-10-08$5.94$5.94560,600
1998-10-07$5.91$5.91631,600
1998-10-06$6.69$6.69225,200
1998-10-05$6.75$6.75311,200
1998-10-02$7.19$7.19324,800
1998-10-01$6.56$6.56475,400
1998-09-30$7.28$7.28342,400
1998-09-29$8.31$8.31234,800
1998-09-28$7.88$7.88314,000
1998-09-25$7.13$7.13158,600
1998-09-24$7.13$7.13412,800
1998-09-23$8.00$8.00809,800
1998-09-22$7.63$7.631,957,800
1998-09-21$6.03$6.03322,400
1998-09-18$6.09$6.09635,600
1998-09-17$6.00$6.00237,600
1998-09-16$6.19$6.19171,000
1998-09-15$6.25$6.25150,200
1998-09-14$6.28$6.282,217,400
1998-09-11$6.56$6.56875,000
1998-09-10$5.63$5.63811,200
1998-09-09$5.31$5.31652,200
1998-09-08$6.44$6.44441,800
1998-09-04$5.88$5.88200,000
1998-09-03$5.78$5.78673,800
1998-09-02$6.00$6.00698,000
1998-09-01$5.88$5.881,255,600
1998-08-31$5.47$5.47534,600
1998-08-28$6.00$6.00568,400
1998-08-27$6.44$6.44417,400
1998-08-26$6.88$6.88217,800
1998-08-25$7.09$7.09598,000
1998-08-24$7.63$7.63183,200
1998-08-21$7.69$7.69696,200
1998-08-20$7.94$7.94115,200
1998-08-19$8.06$8.06229,600
1998-08-18$8.13$8.13348,400
1998-08-17$7.94$7.94398,000
1998-08-14$8.00$8.00282,400
1998-08-13$8.25$8.25484,000
1998-08-12$8.75$8.75214,600
1998-08-11$8.56$8.56351,800
1998-08-10$9.03$9.03341,600
1998-08-07$9.00$9.00481,000
1998-08-06$9.25$9.25232,800
1998-08-05$9.00$9.00198,400
1998-08-04$9.00$9.00627,600
1998-08-03$9.75$9.75123,600
1998-07-31$9.88$9.88432,800
1998-07-30$9.81$9.81148,600
1998-07-29$9.50$9.50140,200
1998-07-28$9.22$9.22600,600
1998-07-27$9.28$9.2881,800
1998-07-24$9.31$9.3197,600
1998-07-23$9.28$9.28246,800
1998-07-22$9.56$9.56460,000
1998-07-21$9.94$9.94351,200
1998-07-20$10.88$10.88270,400
1998-07-17$10.31$10.31337,000
1998-07-16$10.31$10.31133,000
1998-07-15$10.13$10.13273,800
1998-07-14$10.00$10.00493,800
1998-07-13$9.56$9.56266,800
1998-07-10$9.50$9.50355,200
1998-07-09$9.88$9.88427,000
1998-07-08$9.38$9.38762,400
1998-07-07$8.53$8.53966,800
1998-07-06$8.88$8.88331,200
1998-07-02$9.06$9.06215,600
1998-07-01$9.13$9.13130,200
1998-06-30$8.94$8.94795,000
1998-06-29$8.94$8.94625,800
1998-06-26$9.09$9.09532,200
1998-06-25$8.66$8.66581,600
1998-06-24$8.94$8.941,054,800
1998-06-23$9.25$9.25251,800
1998-06-22$9.50$9.50187,200
1998-06-19$9.75$9.75390,400
1998-06-18$9.84$9.8486,200
1998-06-17$9.88$9.88211,200
1998-06-16$9.88$9.88256,200
1998-06-15$9.44$9.44131,000
1998-06-12$10.00$10.00365,200
1998-06-11$10.03$10.03326,800
1998-06-10$10.13$10.13183,000
1998-06-09$10.31$10.3174,200
1998-06-08$10.50$10.5088,000
1998-06-05$10.63$10.63271,400
1998-06-04$10.53$10.53298,000
1998-06-03$10.63$10.63350,000
1998-06-02$10.75$10.75157,400
1998-06-01$10.75$10.75162,000
1998-05-29$10.94$10.94653,000
1998-05-28$10.75$10.75389,400
1998-05-27$10.50$10.50731,600
1998-05-26$10.47$10.47987,000
1998-05-22$10.56$10.56290,600
1998-05-21$11.25$11.25324,200
1998-05-20$11.50$11.50614,400
1998-05-19$11.50$11.50427,600
1998-05-18$11.13$11.13479,600
1998-05-15$11.42$11.42153,800
1998-05-14$11.69$11.69139,600
1998-05-13$11.56$11.56341,600
1998-05-12$11.69$11.69142,400
1998-05-11$11.94$11.94188,400
1998-05-08$11.94$11.94267,000
1998-05-07$11.75$11.75367,000
1998-05-06$11.88$11.88417,800
1998-05-05$12.00$12.00151,200
1998-05-04$12.13$12.13708,400
1998-05-01$11.75$11.75120,600
1998-04-30$11.94$11.94600,200
1998-04-29$11.34$11.34513,400
1998-04-28$11.25$11.25187,800
1998-04-27$11.09$11.09202,800
1998-04-24$11.63$11.63433,400
1998-04-23$11.31$11.31706,800
1998-04-22$10.91$10.91693,800
1998-04-21$11.06$11.06706,600
1998-04-20$11.25$11.25401,000
1998-04-17$11.31$11.3155,600
1998-04-16$11.38$11.38413,600
1998-04-15$11.56$11.56518,800
1998-04-14$11.63$11.63389,400
1998-04-13$11.44$11.44343,200
1998-04-09$11.94$11.94507,000
1998-04-08$12.44$12.44193,200
1998-04-07$12.38$12.38188,200
1998-04-06$12.69$12.69162,600
1998-04-03$12.75$12.75269,400
1998-04-02$12.75$12.75400,000
1998-04-01$12.84$12.84214,400
1998-03-31$12.44$12.44241,200
1998-03-30$12.13$12.13117,400
1998-03-27$12.03$12.03153,400
1998-03-26$11.75$11.75812,400
1998-03-25$12.19$12.19448,200
1998-03-24$12.44$12.44482,400
1998-03-23$12.56$12.56611,600
1998-03-20$13.25$13.25168,000
1998-03-19$13.25$13.25414,200
1998-03-18$13.19$13.19340,000
1998-03-17$12.69$12.69917,800
1998-03-16$13.06$13.061,051,800
1998-03-13$13.06$13.061,170,800
1998-03-12$12.50$12.501,733,400
1998-03-11$11.72$11.72404,800
1998-03-10$11.56$11.561,233,800
1998-03-09$10.88$10.88339,200
1998-03-06$11.06$11.06168,600
1998-03-05$11.06$11.06399,400
1998-03-04$11.31$11.31567,400
1998-03-03$11.47$11.47784,000
1998-03-02$11.41$11.41641,000
1998-02-27$11.59$11.59946,000
1998-02-26$11.75$11.751,764,800
1998-02-25$11.66$11.66489,800
1998-02-24$11.31$11.31341,400
1998-02-23$11.81$11.81310,000
1998-02-20$11.97$11.97869,400
1998-02-19$12.41$12.41668,000
1998-02-18$12.69$12.69273,000
1998-02-17$12.56$12.56150,400
1998-02-13$13.00$13.00190,000
1998-02-12$13.38$13.38340,000
1998-02-11$12.97$12.97174,200
1998-02-10$13.25$13.25332,600
1998-02-09$13.13$13.13363,800
1998-02-06$13.22$13.22369,800
1998-02-05$12.69$12.69225,000
1998-02-04$13.25$13.25899,200
1998-02-03$12.41$12.41212,600
1998-02-02$12.00$12.00184,800
1998-01-30$12.13$12.1368,000
1998-01-29$12.38$12.38335,400
1998-01-28$12.66$12.66168,200
1998-01-27$12.19$12.19203,400
1998-01-26$12.34$12.34446,800
1998-01-23$12.00$12.00390,400
1998-01-22$12.50$12.501,203,800
1998-01-21$11.56$11.56447,800
1998-01-20$12.50$12.50696,200
1998-01-16$11.50$11.50127,200
1998-01-15$11.06$11.06212,400
1998-01-14$11.19$11.19378,600
1998-01-13$11.88$11.88340,200
1998-01-12$10.94$10.94382,400
1998-01-09$10.67$10.67310,400
1998-01-08$10.63$10.63158,800
1998-01-07$10.56$10.56166,600
1998-01-06$10.50$10.50393,400
1998-01-05$9.81$9.81203,600
1998-01-02$9.94$9.94139,200