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 — 1991

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
1991-12-31$9.00$9.00135,400
1991-12-30$8.00$8.0077,000
1991-12-27$7.75$7.75216,200
1991-12-26$7.63$7.63109,400
1991-12-24$7.75$7.75119,000
1991-12-23$7.50$7.50228,800
1991-12-20$7.69$7.6988,600
1991-12-19$7.88$7.88203,000
1991-12-18$7.63$7.63178,200
1991-12-17$8.13$8.1341,800
1991-12-16$8.13$8.1349,800
1991-12-13$8.00$8.0017,000
1991-12-12$8.00$8.0094,400
1991-12-11$7.75$7.75159,000
1991-12-10$7.88$7.8887,600
1991-12-09$8.13$8.13337,800
1991-12-06$7.75$7.7594,600
1991-12-05$7.38$7.38240,000
1991-12-04$6.38$6.38179,200
1991-12-03$6.50$6.50180,400
1991-12-02$6.31$6.3194,600
1991-11-29$6.25$6.25156,800
1991-11-27$5.75$5.751,068,000
1991-11-26$5.88$5.88456,600
1991-11-25$5.88$5.88561,000
1991-11-22$6.13$6.13104,200
1991-11-21$6.63$6.6350,000
1991-11-20$6.50$6.50685,800
1991-11-19$6.75$6.75282,000
1991-11-18$7.88$7.88609,200
1991-11-15$8.00$8.00171,400
1991-11-14$9.25$9.25167,400
1991-11-13$9.75$9.75209,000
1991-11-12$10.13$10.13192,200
1991-11-11$9.63$9.63128,600
1991-11-08$9.50$9.5096,200
1991-11-07$9.00$9.00194,200
1991-11-06$8.63$8.63327,600
1991-11-05$9.50$9.50136,200
1991-11-04$10.25$10.25306,000
1991-11-01$10.38$10.38211,600
1991-10-31$10.38$10.38307,000
1991-10-30$9.50$9.50206,000
1991-10-29$9.38$9.38233,800
1991-10-28$9.06$9.06516,000
1991-10-25$9.00$9.001,846,000
1991-10-24$8.81$8.81399,600
1991-10-23$9.75$9.75164,000
1991-10-22$9.38$9.3872,600
1991-10-21$9.25$9.2590,800
1991-10-18$9.63$9.63209,200
1991-10-17$9.25$9.25148,000
1991-10-16$8.25$8.2525,600
1991-10-15$8.13$8.1338,800
1991-10-14$7.94$7.9494,400
1991-10-11$8.13$8.137,200
1991-10-10$8.13$8.13139,200
1991-10-09$8.38$8.3813,400
1991-10-08$8.38$8.3830,600
1991-10-07$8.50$8.50765,600
1991-10-04$8.50$8.508,400
1991-10-03$8.63$8.6378,000
1991-10-02$8.50$8.507,200
1991-10-01$8.38$8.387,400
1991-09-30$8.50$8.5015,000
1991-09-27$8.63$8.637,800
1991-09-26$8.50$8.5036,600
1991-09-25$8.75$8.7552,400
1991-09-24$8.50$8.5035,000
1991-09-23$8.50$8.5083,800
1991-09-20$9.00$9.0090,400
1991-09-19$8.50$8.5084,200
1991-09-18$8.75$8.75207,600
1991-09-17$9.00$9.0061,800
1991-09-16$9.13$9.13119,200
1991-09-13$9.25$9.25258,600
1991-09-12$9.25$9.25370,400
1991-09-11$7.50$7.5072,400
1991-09-10$7.50$7.5094,600
1991-09-09$7.63$7.6356,600
1991-09-06$7.56$7.5660,200
1991-09-05$7.63$7.63139,600
1991-09-04$7.38$7.38202,800
1991-09-03$7.25$7.2594,200
1991-08-30$7.63$7.6390,200
1991-08-29$7.63$7.63150,000
1991-08-28$7.50$7.50188,800
1991-08-27$7.50$7.50318,000
1991-08-26$7.25$7.25303,400
1991-08-23$6.63$6.63369,800
1991-08-22$5.50$5.50323,600
1991-08-21$5.00$5.00285,400
1991-08-20$4.25$4.2558,200
1991-08-19$4.63$4.6341,800
1991-08-16$4.81$4.812,000
1991-08-15$4.81$4.81286,000
1991-08-14$4.69$4.692,000
1991-08-13$4.88$4.884,400
1991-08-12$4.63$4.6316,000
1991-08-09$4.63$4.6329,200
1991-08-08$4.88$4.88800
1991-08-07$4.88$4.881,000
1991-08-06$4.63$4.63402,800
1991-08-05$4.75$4.7524,000
1991-08-02$4.63$4.6330,200
1991-08-01$4.88$4.88219,000
1991-07-31$4.63$4.63493,000
1991-07-30$4.88$4.8813,000
1991-07-29$4.94$4.9443,400
1991-07-26$5.19$5.197,000
1991-07-25$5.13$5.1311,000
1991-07-24$5.00$5.00117,000
1991-07-23$5.00$5.0087,800
1991-07-22$5.38$5.38395,200
1991-07-19$5.38$5.38224,800
1991-07-18$5.50$5.50266,200
1991-07-17$5.38$5.38104,800
1991-07-16$5.50$5.501,869,200