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 — 1999

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
1999-12-31$24.56$24.56132,400
1999-12-30$24.31$24.31778,000
1999-12-29$25.88$25.88383,800
1999-12-28$25.88$25.88461,800
1999-12-27$26.25$26.25329,800
1999-12-23$26.81$26.812,114,000
1999-12-22$25.50$25.50327,800
1999-12-21$25.63$25.63792,600
1999-12-20$24.38$24.38501,000
1999-12-17$24.00$24.00717,400
1999-12-16$22.88$22.88499,200
1999-12-15$20.56$20.56589,400
1999-12-14$20.31$20.31401,600
1999-12-13$20.00$20.00346,400
1999-12-10$20.63$20.63811,600
1999-12-09$21.44$21.441,851,000
1999-12-08$21.55$21.55802,200
1999-12-07$21.91$21.91655,400
1999-12-06$22.00$22.00221,800
1999-12-03$22.16$22.16221,400
1999-12-02$21.91$21.91333,200
1999-12-01$21.69$21.69198,400
1999-11-30$21.25$21.251,359,400
1999-11-29$22.38$22.38351,400
1999-11-26$22.91$22.91426,200
1999-11-24$22.31$22.31412,200
1999-11-23$21.94$21.941,355,400
1999-11-22$22.50$22.501,244,200
1999-11-19$20.22$20.22857,600
1999-11-18$20.72$20.72214,000
1999-11-17$20.75$20.751,520,400
1999-11-16$20.81$20.811,262,800
1999-11-15$19.81$19.81232,200
1999-11-12$20.50$20.5093,400
1999-11-11$20.72$20.72479,800
1999-11-10$20.06$20.06235,600
1999-11-09$20.19$20.191,300,200
1999-11-08$20.00$20.00653,800
1999-11-05$19.16$19.16823,000
1999-11-04$18.16$18.16210,400
1999-11-03$18.53$18.53368,400
1999-11-02$18.63$18.63509,800
1999-11-01$18.25$18.25541,400
1999-10-29$17.66$17.66307,800
1999-10-28$16.50$16.50704,600
1999-10-27$16.75$16.75198,600
1999-10-26$17.34$17.3493,600
1999-10-25$17.53$17.53307,800
1999-10-22$17.75$17.75215,600
1999-10-21$17.66$17.66185,200
1999-10-20$17.84$17.84466,000
1999-10-19$17.56$17.56487,600
1999-10-18$16.78$16.781,283,200
1999-10-15$17.81$17.81369,800
1999-10-14$18.13$18.13621,000
1999-10-13$18.34$18.34520,800
1999-10-12$18.13$18.13490,400
1999-10-11$18.38$18.38508,400
1999-10-08$18.63$18.631,517,400
1999-10-07$16.13$16.13383,600
1999-10-06$16.53$16.53365,200
1999-10-05$15.59$15.59691,600
1999-10-04$15.38$15.38554,600
1999-10-01$14.75$14.75246,800
1999-09-30$14.41$14.41449,000
1999-09-29$14.34$14.34915,600
1999-09-28$14.00$14.00659,400
1999-09-27$15.44$15.44939,800
1999-09-24$15.66$15.661,320,800
1999-09-23$16.50$16.50694,400
1999-09-22$16.66$16.66316,400
1999-09-21$16.44$16.44641,400
1999-09-20$16.66$16.66302,800
1999-09-17$16.56$16.56944,800
1999-09-16$15.47$15.471,470,400
1999-09-15$16.44$16.441,845,400
1999-09-14$17.95$17.95481,800
1999-09-13$18.69$18.69609,200
1999-09-10$18.17$18.17399,800
1999-09-09$18.50$18.50722,200
1999-09-08$18.94$18.941,825,600
1999-09-07$18.44$18.44881,400
1999-09-03$17.56$17.56768,000
1999-09-02$17.13$17.132,610,000
1999-09-01$16.63$16.634,110,000
1999-08-31$18.56$18.56352,200
1999-08-30$18.03$18.03673,600
1999-08-27$18.19$18.19707,800
1999-08-26$18.22$18.22721,600
1999-08-25$18.50$18.50858,400
1999-08-24$18.19$18.19964,400
1999-08-23$17.47$17.47752,400
1999-08-20$16.75$16.75467,000
1999-08-19$16.78$16.781,021,800
1999-08-18$17.25$17.25410,600
1999-08-17$17.63$17.631,843,800
1999-08-16$17.94$17.942,269,200
1999-08-13$17.56$17.562,273,800
1999-08-12$15.69$15.69844,000
1999-08-11$15.88$15.881,151,600
1999-08-10$16.56$16.562,209,400
1999-08-09$15.00$15.00822,000
1999-08-06$15.19$15.191,302,000
1999-08-05$15.03$15.031,942,000
1999-08-04$14.94$14.945,591,200
1999-08-03$13.00$13.002,716,600
1999-08-02$13.44$13.442,552,600
1999-07-30$13.06$13.061,054,400
1999-07-29$12.63$12.63107,600
1999-07-28$12.75$12.75215,200
1999-07-27$12.63$12.63345,200
1999-07-26$12.50$12.50256,400
1999-07-23$12.75$12.7586,400
1999-07-22$12.63$12.63462,400
1999-07-21$12.56$12.56559,400
1999-07-20$12.34$12.34333,800
1999-07-19$12.50$12.50245,200
1999-07-16$12.88$12.88151,600
1999-07-15$13.06$13.061,939,200
1999-07-14$13.06$13.06242,600
1999-07-13$12.94$12.94420,600
1999-07-12$12.69$12.69122,800
1999-07-09$12.88$12.88542,600
1999-07-08$12.56$12.561,097,400
1999-07-07$12.03$12.03291,000
1999-07-06$12.31$12.31463,000
1999-07-02$12.25$12.25129,200
1999-07-01$12.13$12.13566,200
1999-06-30$11.56$11.56490,200
1999-06-29$12.38$12.381,012,600
1999-06-28$12.00$12.00445,000
1999-06-25$12.56$12.56198,400
1999-06-24$13.00$13.00454,200
1999-06-23$13.00$13.00210,600
1999-06-22$13.06$13.06484,800
1999-06-21$12.78$12.78114,600
1999-06-18$12.63$12.63272,000
1999-06-17$12.50$12.50638,200
1999-06-16$12.00$12.00153,400
1999-06-15$11.50$11.50432,800
1999-06-14$11.50$11.501,015,600
1999-06-11$12.69$12.69518,000
1999-06-10$12.97$12.97329,600
1999-06-09$13.03$13.03232,200
1999-06-08$12.94$12.94348,600
1999-06-07$13.63$13.63475,400
1999-06-04$12.88$12.88383,000
1999-06-03$12.44$12.44118,800
1999-06-02$12.50$12.50384,800
1999-06-01$13.00$13.00468,000
1999-05-28$12.38$12.38721,000
1999-05-27$11.44$11.44779,000
1999-05-26$11.72$11.72585,600
1999-05-25$11.81$11.81439,800
1999-05-24$11.97$11.971,002,000
1999-05-21$11.66$11.66363,400
1999-05-20$11.81$11.81798,400
1999-05-19$11.44$11.44396,400
1999-05-18$11.69$11.69132,800
1999-05-17$12.13$12.1387,800
1999-05-14$12.00$12.00653,600
1999-05-13$12.44$12.44778,200
1999-05-12$12.09$12.091,050,600
1999-05-11$12.03$12.03686,600
1999-05-10$12.00$12.00244,200
1999-05-07$12.22$12.22213,600
1999-05-06$12.31$12.31752,200
1999-05-05$12.63$12.63324,800
1999-05-04$13.22$13.22207,400
1999-05-03$12.94$12.94272,400
1999-04-30$13.38$13.38522,600
1999-04-29$12.81$12.81406,600
1999-04-28$12.38$12.38605,400
1999-04-27$13.63$13.63171,600
1999-04-26$14.06$14.06245,200
1999-04-23$14.44$14.44149,600
1999-04-22$14.13$14.13187,800
1999-04-21$14.50$14.50261,200
1999-04-20$14.31$14.31647,000
1999-04-19$14.38$14.38872,400
1999-04-16$15.03$15.03377,800
1999-04-15$14.78$14.78922,800
1999-04-14$14.56$14.56353,400
1999-04-13$14.56$14.56398,400
1999-04-12$14.28$14.28342,600
1999-04-09$14.00$14.00235,600
1999-04-08$14.06$14.061,161,000
1999-04-07$13.25$13.251,270,400
1999-04-06$14.19$14.19792,000
1999-04-05$15.06$15.061,216,200
1999-04-01$14.50$14.50571,400
1999-03-31$13.63$13.63593,200
1999-03-30$13.31$13.31862,800
1999-03-29$13.44$13.441,728,400
1999-03-26$14.56$14.56723,200
1999-03-25$15.44$15.44283,600
1999-03-24$15.31$15.31649,800
1999-03-23$15.81$15.81291,000
1999-03-22$15.75$15.75242,400
1999-03-19$16.00$16.00630,600
1999-03-18$15.94$15.94969,600
1999-03-17$15.13$15.13178,200
1999-03-16$15.03$15.03265,000
1999-03-15$14.94$14.94410,600
1999-03-12$15.19$15.19218,200
1999-03-11$15.16$15.16637,600
1999-03-10$15.03$15.03931,000
1999-03-09$15.03$15.03471,400
1999-03-08$15.28$15.281,443,000
1999-03-05$15.00$15.00652,800
1999-03-04$14.25$14.25859,400
1999-03-03$13.69$13.69625,400
1999-03-02$14.00$14.00391,600
1999-03-01$14.34$14.34580,200
1999-02-26$14.03$14.03442,800
1999-02-25$13.81$13.81606,000
1999-02-24$13.50$13.50999,200
1999-02-23$13.97$13.971,122,400
1999-02-22$12.06$12.06600,400
1999-02-19$12.38$12.381,486,400
1999-02-18$13.34$13.34355,000
1999-02-17$13.69$13.6988,800
1999-02-16$13.83$13.83651,800
1999-02-12$13.88$13.881,345,400
1999-02-11$14.25$14.251,870,400
1999-02-10$14.81$14.81990,400
1999-02-09$15.19$15.19621,200
1999-02-08$15.22$15.22459,600
1999-02-05$15.06$15.061,196,800
1999-02-04$15.25$15.25955,200
1999-02-03$15.25$15.25681,200
1999-02-02$15.81$15.81680,200
1999-02-01$15.50$15.501,940,800
1999-01-29$15.56$15.56372,000
1999-01-28$15.81$15.811,039,200
1999-01-27$15.44$15.441,692,800
1999-01-26$15.25$15.251,548,600
1999-01-25$13.94$13.94299,800
1999-01-22$14.13$14.13550,800
1999-01-21$14.19$14.19936,000
1999-01-20$14.06$14.061,283,400
1999-01-19$13.44$13.44207,600
1999-01-15$12.53$12.53314,200
1999-01-14$12.19$12.19536,200
1999-01-13$13.00$13.00890,800
1999-01-12$13.94$13.941,339,800
1999-01-11$13.94$13.941,166,200
1999-01-08$13.94$13.941,547,000
1999-01-07$12.75$12.751,924,400
1999-01-06$12.25$12.251,051,600
1999-01-05$11.44$11.44371,800
1999-01-04$11.69$11.69887,800