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.

View year

Historical Stock Price — 1997

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
1997-12-31$9.94$9.94295,400
1997-12-30$9.44$9.4487,600
1997-12-29$9.19$9.19155,000
1997-12-26$9.31$9.3138,800
1997-12-24$9.38$9.38163,600
1997-12-23$9.31$9.31173,800
1997-12-22$9.38$9.38130,800
1997-12-19$9.00$9.00194,800
1997-12-18$9.25$9.2586,200
1997-12-17$9.50$9.50209,800
1997-12-16$9.63$9.63376,800
1997-12-15$8.75$8.75207,800
1997-12-12$8.69$8.69109,200
1997-12-11$8.63$8.63282,800
1997-12-10$9.00$9.00229,800
1997-12-09$9.75$9.75241,800
1997-12-08$10.00$10.00572,600
1997-12-05$9.44$9.44644,400
1997-12-04$8.38$8.38588,600
1997-12-03$9.25$9.25296,600
1997-12-02$9.63$9.63184,400
1997-12-01$10.06$10.06222,800
1997-11-28$9.88$9.8841,000
1997-11-26$9.88$9.88212,800
1997-11-25$9.94$9.94186,400
1997-11-24$9.81$9.81523,000
1997-11-21$10.13$10.13181,200
1997-11-20$10.50$10.50182,400
1997-11-19$10.50$10.50288,800
1997-11-18$10.75$10.75107,000
1997-11-17$11.00$11.00251,200
1997-11-14$10.84$10.84297,200
1997-11-13$10.56$10.56638,200
1997-11-12$10.81$10.81305,800
1997-11-11$11.38$11.38286,200
1997-11-10$11.63$11.63455,000
1997-11-07$11.88$11.88427,400
1997-11-06$12.06$12.06379,600
1997-11-05$12.19$12.19584,400
1997-11-04$11.75$11.75578,400
1997-11-03$11.25$11.2597,400
1997-10-31$11.38$11.38683,200
1997-10-30$11.19$11.19475,400
1997-10-29$11.00$11.00682,000
1997-10-28$10.00$10.001,288,800
1997-10-27$10.00$10.00680,600
1997-10-24$11.00$11.00387,400
1997-10-23$11.06$11.06497,800
1997-10-22$11.63$11.63323,600
1997-10-21$11.13$11.13301,400
1997-10-20$10.59$10.59224,600
1997-10-17$10.44$10.44869,800
1997-10-16$10.75$10.75347,200
1997-10-15$11.25$11.25315,000
1997-10-14$11.25$11.25649,000
1997-10-13$11.75$11.75150,600
1997-10-10$11.63$11.63129,400
1997-10-09$11.50$11.50421,600
1997-10-08$11.31$11.31381,800
1997-10-07$11.25$11.25755,200
1997-10-06$11.81$11.811,587,600
1997-10-03$11.00$11.00878,400
1997-10-02$10.97$10.971,754,400
1997-10-01$10.44$10.44880,600
1997-09-30$10.31$10.31201,400
1997-09-29$10.31$10.31266,400
1997-09-26$10.63$10.63872,400
1997-09-25$10.47$10.47694,800
1997-09-24$11.06$11.06423,800
1997-09-23$11.25$11.25206,400
1997-09-22$11.28$11.28762,400
1997-09-19$11.31$11.31728,200
1997-09-18$11.06$11.06280,600
1997-09-17$10.94$10.941,553,400
1997-09-16$10.19$10.191,149,400
1997-09-15$10.13$10.13442,200
1997-09-12$10.13$10.13238,000
1997-09-11$9.88$9.88375,800
1997-09-10$10.19$10.19338,600
1997-09-09$10.44$10.441,030,200
1997-09-08$10.03$10.03814,400
1997-09-05$10.00$10.00706,600
1997-09-04$9.75$9.75590,200
1997-09-03$9.44$9.44238,600
1997-09-02$9.31$9.31350,600
1997-08-29$9.31$9.31667,800
1997-08-28$9.31$9.31507,200
1997-08-27$9.41$9.41409,800
1997-08-26$9.06$9.06419,400
1997-08-25$9.06$9.06588,400
1997-08-22$9.50$9.50762,200
1997-08-21$9.63$9.631,365,000
1997-08-20$8.25$8.25485,600
1997-08-19$8.03$8.03443,000
1997-08-18$7.75$7.75629,000
1997-08-15$7.81$7.81599,000
1997-08-14$8.00$8.00357,800
1997-08-13$8.00$8.00187,000
1997-08-12$7.88$7.88159,800
1997-08-11$8.09$8.09228,200
1997-08-08$8.63$8.63250,400
1997-08-07$8.50$8.50319,200
1997-08-06$8.44$8.44872,600
1997-08-05$8.19$8.19433,400
1997-08-04$7.94$7.94534,400
1997-08-01$8.25$8.25587,200
1997-07-31$7.94$7.94478,200
1997-07-30$8.13$8.13326,000
1997-07-29$7.75$7.7558,000
1997-07-28$7.66$7.66228,200
1997-07-25$7.94$7.94241,600
1997-07-24$7.94$7.94342,600
1997-07-23$7.56$7.56318,200
1997-07-22$7.63$7.63512,800
1997-07-21$7.56$7.56173,600
1997-07-18$7.38$7.38571,200
1997-07-17$7.38$7.38916,400
1997-07-16$7.38$7.38719,000
1997-07-15$7.25$7.25589,600
1997-07-14$6.75$6.75535,600
1997-07-11$6.69$6.69266,400
1997-07-10$6.72$6.72385,800
1997-07-09$6.63$6.63101,800
1997-07-08$6.63$6.631,264,600
1997-07-07$6.31$6.31661,000
1997-07-03$6.88$6.88494,200
1997-07-02$7.13$7.13351,600
1997-07-01$7.25$7.25149,200
1997-06-30$7.25$7.25551,000
1997-06-27$7.56$7.56179,400
1997-06-26$7.63$7.63207,800
1997-06-25$7.44$7.44146,400
1997-06-24$7.56$7.56240,200
1997-06-23$7.19$7.19196,400
1997-06-20$7.44$7.44319,400
1997-06-19$7.63$7.63480,800
1997-06-18$7.94$7.94177,800
1997-06-17$8.00$8.00103,000
1997-06-16$8.13$8.1394,000
1997-06-13$8.50$8.50259,400
1997-06-12$8.28$8.28122,800
1997-06-11$8.19$8.1995,600
1997-06-10$8.25$8.2560,000
1997-06-09$8.50$8.50155,400
1997-06-06$8.56$8.56574,400
1997-06-05$8.38$8.38267,600
1997-06-04$8.25$8.25256,200
1997-06-03$8.44$8.44676,000
1997-06-02$8.44$8.44247,200
1997-05-30$8.25$8.25470,000
1997-05-29$8.00$8.00450,400
1997-05-28$7.81$7.81458,000
1997-05-27$8.44$8.44405,200
1997-05-23$8.44$8.44992,600
1997-05-22$8.06$8.06530,200
1997-05-21$7.50$7.50399,600
1997-05-20$7.50$7.50171,000
1997-05-19$7.06$7.06108,600
1997-05-16$7.00$7.00202,200
1997-05-15$7.06$7.06372,200
1997-05-14$7.38$7.38296,000
1997-05-13$7.13$7.13189,400
1997-05-12$7.19$7.19241,200
1997-05-09$6.94$6.94206,000
1997-05-08$7.19$7.19180,400
1997-05-07$6.88$6.88477,600
1997-05-06$7.25$7.25516,000
1997-05-05$7.38$7.38658,800
1997-05-02$7.25$7.25537,600
1997-05-01$6.69$6.691,173,600
1997-04-30$5.50$5.50305,200
1997-04-29$5.75$5.75322,600
1997-04-28$5.19$5.19528,400
1997-04-25$5.38$5.38617,400
1997-04-24$5.56$5.56441,400
1997-04-23$5.88$5.88618,000
1997-04-22$6.19$6.195,123,200
1997-04-21$5.75$5.75799,600
1997-04-18$6.69$6.69242,400
1997-04-17$6.44$6.44646,200
1997-04-16$5.94$5.941,084,600
1997-04-15$6.50$6.50765,600
1997-04-14$6.00$6.00826,000
1997-04-11$6.81$6.81499,000
1997-04-10$7.63$7.63546,200
1997-04-09$7.50$7.50152,400
1997-04-08$7.19$7.19378,600
1997-04-07$7.44$7.44329,400
1997-04-04$7.06$7.06433,200
1997-04-03$7.44$7.44599,600
1997-04-02$7.06$7.061,201,400
1997-04-01$7.38$7.381,099,600
1997-03-31$7.00$7.008,461,800
1997-03-27$10.13$10.131,847,800
1997-03-26$9.81$9.811,066,400
1997-03-25$9.94$9.941,137,800
1997-03-24$10.19$10.19535,000
1997-03-21$10.94$10.94836,000
1997-03-20$10.25$10.251,223,200
1997-03-19$10.44$10.441,187,000
1997-03-18$11.63$11.63799,800
1997-03-17$12.00$12.00479,200
1997-03-14$12.56$12.56436,200
1997-03-13$12.88$12.88593,200
1997-03-12$13.50$13.50404,600
1997-03-11$13.63$13.63651,200
1997-03-10$13.69$13.69632,400
1997-03-07$13.44$13.44255,000
1997-03-06$13.31$13.31516,000
1997-03-05$13.63$13.63792,600
1997-03-04$12.94$12.94800,200
1997-03-03$12.44$12.44827,800
1997-02-28$12.44$12.44789,600
1997-02-27$12.88$12.88612,600
1997-02-26$13.25$13.25579,200
1997-02-25$13.31$13.31669,400
1997-02-24$13.56$13.56862,800
1997-02-21$13.38$13.38628,400
1997-02-20$13.50$13.50826,200
1997-02-19$14.13$14.131,714,400
1997-02-18$14.81$14.812,144,600
1997-02-14$13.50$13.503,144,200
1997-02-13$11.38$11.38934,200
1997-02-12$10.50$10.50321,600
1997-02-11$10.50$10.50641,800
1997-02-10$10.63$10.63305,400
1997-02-07$10.63$10.63365,000
1997-02-06$10.63$10.63650,400
1997-02-05$10.94$10.94774,800
1997-02-04$10.50$10.50739,800
1997-02-03$11.06$11.06195,400
1997-01-31$11.63$11.63851,000
1997-01-30$10.69$10.69237,200
1997-01-29$10.25$10.25542,000
1997-01-28$10.13$10.13395,400
1997-01-27$10.56$10.56180,400
1997-01-24$11.00$11.00356,200
1997-01-23$11.38$11.38628,400
1997-01-22$11.00$11.00318,400
1997-01-21$11.03$11.03330,000
1997-01-20$11.06$11.06835,600
1997-01-17$10.81$10.812,179,400
1997-01-16$11.81$11.811,465,800
1997-01-15$11.06$11.06762,200
1997-01-14$11.50$11.501,388,600
1997-01-13$11.69$11.691,165,600
1997-01-10$12.94$12.942,892,000
1997-01-09$11.69$11.691,547,000
1997-01-08$12.38$12.383,115,200
1997-01-07$13.50$13.502,162,800
1997-01-06$12.44$12.441,608,800
1997-01-03$12.38$12.382,421,800
1997-01-02$11.19$11.19915,200