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 — 2015

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2015-12-31$79.38$79.38733,900
2015-12-30$78.72$78.72512,600
2015-12-29$78.80$78.80910,800
2015-12-28$80.14$80.14694,200
2015-12-24$79.11$79.11261,800
2015-12-23$78.63$78.63511,400
2015-12-22$76.30$76.30675,700
2015-12-21$77.48$77.48686,900
2015-12-18$76.50$76.501,671,900
2015-12-17$77.69$77.691,223,700
2015-12-16$78.65$78.651,415,700
2015-12-15$72.74$72.74849,400
2015-12-14$71.63$71.63705,300
2015-12-11$71.40$71.40627,800
2015-12-10$72.71$72.71444,000
2015-12-09$73.33$73.33862,300
2015-12-08$73.58$73.58739,100
2015-12-07$71.73$71.73577,800
2015-12-04$73.70$73.70641,700
2015-12-03$71.24$71.24588,100
2015-12-02$74.32$74.32747,200
2015-12-01$72.88$72.88692,600
2015-11-30$73.36$73.36829,500
2015-11-27$75.60$75.60270,700
2015-11-25$74.06$74.06557,900
2015-11-24$74.26$74.26673,500
2015-11-23$72.53$72.53862,800
2015-11-20$72.30$72.30807,500
2015-11-19$73.07$73.07816,600
2015-11-18$74.29$74.291,334,600
2015-11-17$74.28$74.28710,200
2015-11-16$73.20$73.20596,300
2015-11-13$72.07$72.07640,400
2015-11-12$71.42$71.42634,200
2015-11-11$73.74$73.74670,800
2015-11-10$73.87$73.87699,000
2015-11-09$72.12$72.12703,400
2015-11-06$71.99$71.99591,400
2015-11-05$71.22$71.22685,900
2015-11-04$72.01$72.01956,100
2015-11-03$71.77$71.771,211,800
2015-11-02$73.96$73.961,282,400
2015-10-30$71.92$71.921,171,800
2015-10-29$70.99$70.991,832,200
2015-10-28$66.81$66.811,158,500
2015-10-27$64.04$64.04612,900
2015-10-26$62.47$62.47802,100
2015-10-23$61.46$61.461,151,000
2015-10-22$60.69$60.69827,100
2015-10-21$60.10$60.101,174,200
2015-10-20$60.61$60.61655,500
2015-10-19$62.38$62.38766,300
2015-10-16$61.33$61.331,098,900
2015-10-15$61.77$61.771,079,600
2015-10-14$59.28$59.281,001,300
2015-10-13$57.89$57.89885,100
2015-10-12$59.07$59.07793,900
2015-10-09$60.82$60.821,250,400
2015-10-08$59.90$59.901,127,700
2015-10-07$59.98$59.981,276,500
2015-10-06$58.50$58.501,911,000
2015-10-05$59.77$59.77994,900
2015-10-02$60.48$60.481,306,000
2015-10-01$59.51$59.51999,300
2015-09-30$58.67$58.671,478,400
2015-09-29$55.08$55.081,683,100
2015-09-28$56.91$56.912,137,300
2015-09-25$61.60$61.601,009,700
2015-09-24$64.41$64.411,348,700
2015-09-23$66.39$66.39834,300
2015-09-22$66.65$66.651,219,000
2015-09-21$68.11$68.111,875,700
2015-09-18$72.10$72.102,117,200
2015-09-17$72.79$72.791,251,400
2015-09-16$71.12$71.12690,000
2015-09-15$71.44$71.441,118,800
2015-09-14$71.41$71.411,187,300
2015-09-11$70.95$70.951,078,100
2015-09-10$69.67$69.67991,600
2015-09-09$68.27$68.271,140,900
2015-09-08$68.79$68.791,139,600
2015-09-04$64.58$64.58928,900
2015-09-03$62.91$62.911,159,500
2015-09-02$63.11$63.111,238,900
2015-09-01$59.41$59.411,440,100
2015-08-31$59.56$59.56745,700
2015-08-28$63.15$63.15812,100
2015-08-27$61.17$61.17666,700
2015-08-26$60.07$60.07980,200
2015-08-25$57.53$57.53910,100
2015-08-24$56.65$56.651,148,300
2015-08-21$60.35$60.351,203,700
2015-08-20$62.79$62.79760,100
2015-08-19$66.05$66.05759,100
2015-08-18$67.67$67.67617,700
2015-08-17$68.20$68.20719,900
2015-08-14$65.81$65.811,293,500
2015-08-13$68.34$68.34450,500
2015-08-12$67.88$67.88971,700
2015-08-11$67.97$67.97718,200
2015-08-10$67.76$67.76586,600
2015-08-07$67.21$67.21824,700
2015-08-06$67.75$67.751,031,100
2015-08-05$72.17$72.17767,300
2015-08-04$70.25$70.25561,700
2015-08-03$70.33$70.33743,600
2015-07-31$70.02$70.02749,100
2015-07-30$67.53$67.53847,500
2015-07-29$68.39$68.39957,500
2015-07-28$69.39$69.39746,800
2015-07-27$66.91$66.91748,700
2015-07-24$67.83$67.83849,400
2015-07-23$69.00$69.00454,400
2015-07-22$70.24$70.24652,400
2015-07-21$68.51$68.51619,800
2015-07-20$70.15$70.15510,700
2015-07-17$69.79$69.79726,100
2015-07-16$69.20$69.20633,900
2015-07-15$68.56$68.561,484,200
2015-07-14$67.41$67.411,019,900
2015-07-13$65.05$65.05566,300
2015-07-10$64.22$64.22722,600
2015-07-09$62.34$62.34660,600
2015-07-08$61.77$61.77723,900
2015-07-07$64.12$64.12758,600
2015-07-06$63.84$63.84716,400
2015-07-02$63.07$63.071,107,200
2015-07-01$64.77$64.77923,900
2015-06-30$64.34$64.341,423,600
2015-06-29$62.92$62.92756,200
2015-06-26$65.75$65.751,195,700
2015-06-25$65.16$65.16745,900
2015-06-24$65.66$65.66613,800
2015-06-23$66.99$66.99732,600
2015-06-22$67.00$67.001,171,300
2015-06-19$66.86$66.864,754,000
2015-06-18$63.93$63.931,179,400
2015-06-17$63.91$63.912,384,100
2015-06-16$64.52$64.524,076,900
2015-06-15$58.59$58.59442,600
2015-06-12$58.67$58.67459,600
2015-06-11$60.03$60.03836,000
2015-06-10$58.41$58.411,024,900
2015-06-09$58.25$58.25850,700
2015-06-08$60.35$60.35910,600
2015-06-05$61.21$61.21417,400
2015-06-04$60.84$60.84856,300
2015-06-03$61.23$61.23711,500
2015-06-02$61.03$61.03842,400
2015-06-01$60.33$60.33641,000
2015-05-29$61.10$61.101,075,500
2015-05-28$59.92$59.92507,100
2015-05-27$60.57$60.57682,500
2015-05-26$59.82$59.82753,000
2015-05-22$61.35$61.35596,000
2015-05-21$61.80$61.80685,600
2015-05-20$62.10$62.10770,700
2015-05-19$62.75$62.751,348,100
2015-05-18$60.47$60.47866,400
2015-05-15$60.00$60.00705,000
2015-05-14$60.00$60.00879,200
2015-05-13$58.51$58.51800,300
2015-05-12$58.73$58.73933,100
2015-05-11$59.51$59.511,243,900
2015-05-08$59.25$59.251,667,800
2015-05-07$56.73$56.73977,400
2015-05-06$55.80$55.80937,800
2015-05-05$55.74$55.741,253,800
2015-05-04$57.61$57.611,613,000
2015-05-01$59.10$59.101,685,200
2015-04-30$55.37$55.371,495,300
2015-04-29$57.30$57.301,661,800
2015-04-28$57.16$57.161,405,100
2015-04-27$58.15$58.151,597,800
2015-04-24$62.26$62.26524,100
2015-04-23$63.45$63.45896,200
2015-04-22$62.60$62.60546,400
2015-04-21$62.84$62.84647,000
2015-04-20$61.70$61.70621,200
2015-04-17$62.79$62.791,603,800
2015-04-16$63.68$63.68646,700
2015-04-15$62.83$62.831,110,300
2015-04-14$62.62$62.621,018,100
2015-04-13$64.57$64.571,160,800
2015-04-10$63.52$63.52987,800
2015-04-09$62.56$62.56950,000
2015-04-08$63.20$63.201,457,100
2015-04-07$60.72$60.721,106,500
2015-04-06$60.09$60.091,926,900
2015-04-02$60.10$60.101,534,400
2015-04-01$60.94$60.942,687,500
2015-03-31$60.97$60.971,446,100
2015-03-30$62.52$62.521,410,300
2015-03-27$63.33$63.331,436,600
2015-03-26$62.94$62.941,237,100
2015-03-25$62.46$62.461,522,900
2015-03-24$66.28$66.281,751,500
2015-03-23$65.22$65.221,512,200
2015-03-20$67.20$67.203,529,200
2015-03-19$68.06$68.061,087,200
2015-03-18$67.42$67.42923,000
2015-03-17$66.53$66.531,380,000
2015-03-16$66.57$66.57836,200
2015-03-13$66.39$66.391,217,200
2015-03-12$66.47$66.471,479,900
2015-03-11$67.12$67.121,105,900
2015-03-10$67.32$67.321,269,600
2015-03-09$68.15$68.151,306,600
2015-03-06$68.19$68.191,623,600
2015-03-05$71.22$71.222,109,300
2015-03-04$70.80$70.801,291,200
2015-03-03$72.80$72.801,222,100
2015-03-02$71.47$71.471,154,300
2015-02-27$70.25$70.256,215,900
2015-02-26$71.23$71.231,575,700
2015-02-25$71.11$71.112,554,200
2015-02-24$70.64$70.644,076,900
2015-02-23$73.64$73.641,064,200
2015-02-20$73.24$73.24845,500
2015-02-19$71.96$71.96788,100
2015-02-18$72.66$72.66959,700
2015-02-17$70.79$70.79977,400
2015-02-13$71.40$71.401,136,300
2015-02-12$73.29$73.291,284,500
2015-02-11$70.50$70.501,161,400
2015-02-10$69.63$69.631,332,600
2015-02-09$66.39$66.391,398,900
2015-02-06$69.51$69.51586,900
2015-02-05$70.19$70.19779,300
2015-02-04$69.13$69.131,205,100
2015-02-03$69.22$69.222,229,500
2015-02-02$72.60$72.60977,900
2015-01-30$72.25$72.251,239,000
2015-01-29$72.19$72.19985,000
2015-01-28$71.40$71.401,290,400
2015-01-27$70.55$70.55804,600
2015-01-26$71.36$71.36825,500
2015-01-23$69.81$69.81885,000
2015-01-22$69.00$69.001,278,100
2015-01-21$68.74$68.741,380,900
2015-01-20$70.79$70.791,321,900
2015-01-16$70.00$70.002,249,300
2015-01-15$65.65$65.651,138,900
2015-01-14$67.63$67.631,148,200
2015-01-13$67.36$67.361,672,800
2015-01-12$68.61$68.611,865,500
2015-01-09$65.14$65.141,041,000
2015-01-08$65.23$65.232,584,400
2015-01-07$66.75$66.755,826,800
2015-01-06$60.93$60.934,678,200
2015-01-05$59.38$59.38868,000
2015-01-02$58.24$58.24764,000