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 — 2018

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2018-12-31$29.51$29.51777,700
2018-12-28$28.49$28.491,196,000
2018-12-27$28.92$28.92955,000
2018-12-26$29.50$29.50861,500
2018-12-24$27.94$27.94479,700
2018-12-21$28.45$28.451,331,000
2018-12-20$29.76$29.761,034,800
2018-12-19$29.89$29.891,311,600
2018-12-18$31.82$31.82968,400
2018-12-17$32.95$32.95986,300
2018-12-14$32.82$32.821,283,600
2018-12-13$33.77$33.771,170,100
2018-12-12$35.50$35.50719,800
2018-12-11$34.47$34.47767,500
2018-12-10$34.28$34.28763,200
2018-12-07$34.01$34.011,001,000
2018-12-06$34.77$34.771,052,200
2018-12-04$35.11$35.111,471,600
2018-12-03$36.40$36.40925,100
2018-11-30$36.44$36.441,435,800
2018-11-29$35.75$35.752,963,400
2018-11-28$36.88$36.88792,800
2018-11-27$35.36$35.36616,300
2018-11-26$35.74$35.74785,000
2018-11-23$34.34$34.34277,400
2018-11-21$34.35$34.35734,700
2018-11-20$33.42$33.421,006,700
2018-11-19$34.03$34.03745,400
2018-11-16$34.49$34.49833,400
2018-11-15$34.09$34.09976,300
2018-11-14$33.00$33.001,036,000
2018-11-13$33.87$33.871,187,100
2018-11-12$34.70$34.701,247,200
2018-11-09$37.67$37.67820,600
2018-11-08$39.00$39.00732,300
2018-11-07$39.04$39.041,308,100
2018-11-06$38.92$38.921,120,700
2018-11-05$37.68$37.681,063,800
2018-11-02$37.74$37.741,997,300
2018-11-01$40.83$40.836,900
2018-10-31$40.83$40.831,372,900
2018-10-30$39.80$39.801,875,100
2018-10-29$40.37$40.371,047,300
2018-10-26$41.38$41.38804,600
2018-10-25$41.67$41.671,068,400
2018-10-24$40.03$40.031,824,800
2018-10-23$40.19$40.191,627,700
2018-10-22$38.86$38.861,311,600
2018-10-19$40.16$40.16634,200
2018-10-18$40.80$40.80773,600
2018-10-17$41.33$41.33993,900
2018-10-16$42.32$42.321,235,100
2018-10-15$41.52$41.52582,700
2018-10-12$41.64$41.64659,600
2018-10-11$41.59$41.59497,300
2018-10-10$42.53$42.53460,400
2018-10-09$43.20$43.20780,700
2018-10-08$44.41$44.41472,000
2018-10-05$44.61$44.61839,200
2018-10-04$43.48$43.48543,100
2018-10-03$43.80$43.80464,400
2018-10-02$42.91$42.91487,700
2018-10-01$42.91$42.91513,100
2018-09-28$42.44$42.441,189,400
2018-09-27$43.29$43.29625,200
2018-09-26$42.39$42.39860,500
2018-09-25$42.69$42.69576,200
2018-09-24$42.17$42.17485,600
2018-09-21$41.56$41.561,400,700
2018-09-20$41.11$41.11661,600
2018-09-19$39.58$39.58362,600
2018-09-18$39.03$39.03645,500
2018-09-17$38.60$38.60585,400
2018-09-14$39.66$39.66490,700
2018-09-13$39.70$39.70417,300
2018-09-12$39.88$39.88671,100
2018-09-11$39.86$39.86683,600
2018-09-10$40.09$40.09661,300
2018-09-07$40.69$40.69795,800
2018-09-06$42.95$42.95487,200
2018-09-05$44.51$44.51644,700
2018-09-04$44.51$44.51409,000
2018-08-31$44.84$44.84684,800
2018-08-30$45.85$45.85326,900
2018-08-29$45.61$45.61464,100
2018-08-28$46.12$46.12319,300
2018-08-27$46.03$46.03396,700
2018-08-24$44.85$44.85339,400
2018-08-23$44.87$44.87391,800
2018-08-22$45.46$45.46234,600
2018-08-21$45.69$45.69504,300
2018-08-20$44.38$44.38490,000
2018-08-17$44.53$44.53297,100
2018-08-16$44.21$44.21466,900
2018-08-15$43.76$43.76298,900
2018-08-14$44.45$44.45330,900
2018-08-13$43.79$43.79528,700
2018-08-10$44.03$44.03508,100
2018-08-09$44.79$44.79319,200
2018-08-08$44.96$44.96285,800
2018-08-07$44.98$44.98263,100
2018-08-06$45.03$45.03551,500
2018-08-03$43.75$43.75576,900
2018-08-02$44.64$44.64498,200
2018-08-01$43.48$43.48866,000
2018-07-31$43.85$43.85879,400
2018-07-30$43.94$43.94578,400
2018-07-27$43.91$43.91922,100
2018-07-26$44.79$44.79992,100
2018-07-25$43.96$43.961,257,200
2018-07-24$45.26$45.26833,800
2018-07-23$45.00$45.00620,100
2018-07-20$45.04$45.04637,400
2018-07-19$45.28$45.28396,900
2018-07-18$45.02$45.02486,000
2018-07-17$45.12$45.12508,100
2018-07-16$44.57$44.571,042,400
2018-07-13$44.27$44.27460,600
2018-07-12$43.58$43.58614,100
2018-07-11$42.89$42.89579,300
2018-07-10$43.28$43.28395,700
2018-07-09$43.29$43.29651,700
2018-07-06$42.53$42.53542,200
2018-07-05$41.21$41.21821,300
2018-07-03$40.69$40.69493,500
2018-07-02$41.91$41.91578,200
2018-06-29$41.16$41.16630,500
2018-06-28$40.80$40.80818,800
2018-06-27$40.56$40.56829,200
2018-06-26$42.34$42.34689,000
2018-06-25$42.30$42.30914,000
2018-06-22$44.13$44.131,212,600
2018-06-21$43.65$43.652,033,800
2018-06-20$51.36$51.36428,900
2018-06-19$50.97$50.97741,700
2018-06-18$50.77$50.77647,500
2018-06-15$50.30$50.301,214,600
2018-06-14$50.14$50.141,085,300
2018-06-13$48.99$48.99450,100
2018-06-12$49.78$49.78446,300
2018-06-11$49.03$49.03497,300
2018-06-08$48.61$48.61465,100
2018-06-07$48.30$48.30580,100
2018-06-06$48.31$48.31937,000
2018-06-05$46.39$46.39632,300
2018-06-04$45.60$45.60770,900
2018-06-01$47.59$47.59401,300
2018-05-31$47.20$47.20652,500
2018-05-30$47.90$47.90750,300
2018-05-29$46.51$46.51670,400
2018-05-25$45.77$45.77418,700
2018-05-24$45.42$45.42375,500
2018-05-23$45.64$45.64414,600
2018-05-22$45.58$45.58861,500
2018-05-21$45.22$45.22722,900
2018-05-18$46.27$46.27792,700
2018-05-17$46.01$46.01822,900
2018-05-16$47.68$47.681,435,100
2018-05-15$46.24$46.24627,400
2018-05-14$47.04$47.04629,500
2018-05-11$46.71$46.71692,500
2018-05-10$45.79$45.791,113,800
2018-05-09$44.70$44.70488,700
2018-05-08$44.19$44.19991,600
2018-05-07$43.80$43.80595,500
2018-05-04$43.43$43.43869,200
2018-05-03$43.31$43.31493,100
2018-05-02$43.98$43.98591,100
2018-05-01$44.67$44.67851,800
2018-04-30$44.27$44.27811,500
2018-04-27$44.74$44.74848,300
2018-04-26$46.05$46.051,270,800
2018-04-25$44.07$44.07872,700
2018-04-24$44.37$44.37892,600
2018-04-23$45.18$45.18987,300
2018-04-20$46.02$46.021,421,700
2018-04-19$46.15$46.151,006,600
2018-04-18$46.85$46.851,942,200
2018-04-17$46.36$46.362,070,500
2018-04-16$44.43$44.436,109,200
2018-04-13$42.53$42.53692,300
2018-04-12$42.96$42.96955,000
2018-04-11$43.00$43.001,489,500
2018-04-10$43.25$43.251,270,100
2018-04-09$42.43$42.431,098,200
2018-04-06$42.18$42.181,310,600
2018-04-05$42.69$42.69939,500
2018-04-04$44.16$44.161,901,800
2018-04-03$43.68$43.683,138,300
2018-04-02$45.23$45.238,053,800
2018-03-29$57.96$57.96993,100
2018-03-28$59.23$59.23522,500
2018-03-27$59.05$59.05470,900
2018-03-26$60.66$60.66539,200
2018-03-23$58.28$58.28418,200
2018-03-22$59.24$59.24404,300
2018-03-21$60.50$60.50564,500
2018-03-20$60.32$60.32452,800
2018-03-19$60.46$60.46564,700
2018-03-16$61.25$61.251,171,700
2018-03-15$61.63$61.63521,000
2018-03-14$61.50$61.50537,900
2018-03-13$60.35$60.35669,500
2018-03-12$60.53$60.53732,200
2018-03-09$58.49$58.491,089,600
2018-03-08$60.73$60.73858,100
2018-03-07$58.53$58.531,993,400
2018-03-06$58.88$58.881,207,900
2018-03-05$59.91$59.911,195,600
2018-03-02$60.05$60.051,266,100
2018-03-01$57.41$57.41897,900
2018-02-28$57.08$57.08824,800
2018-02-27$57.43$57.43836,700
2018-02-26$58.12$58.12629,200
2018-02-23$58.60$58.60937,100
2018-02-22$56.55$56.551,876,000
2018-02-21$63.19$63.191,246,300
2018-02-20$64.75$64.751,725,500
2018-02-16$67.26$67.262,687,500
2018-02-15$63.75$63.752,493,800
2018-02-14$59.29$59.291,721,100
2018-02-13$54.69$54.691,090,500
2018-02-12$55.36$55.36840,900
2018-02-09$53.89$53.89746,300
2018-02-08$53.67$53.67584,600
2018-02-07$56.00$56.00668,900
2018-02-06$55.66$55.66903,400
2018-02-05$55.70$55.702,253,800
2018-02-02$63.42$63.422,911,400
2018-02-01$58.33$58.33713,800
2018-01-31$57.17$57.171,050,800
2018-01-30$57.29$57.29856,100
2018-01-29$58.79$58.79893,500
2018-01-26$59.23$59.23552,100
2018-01-25$59.85$59.85350,800
2018-01-24$58.84$58.84507,400
2018-01-23$59.19$59.19774,400
2018-01-22$57.62$57.62728,400
2018-01-19$57.03$57.03716,700
2018-01-18$56.12$56.12758,700
2018-01-17$56.97$56.971,244,100
2018-01-16$56.57$56.571,378,400
2018-01-12$58.71$58.71707,400
2018-01-11$58.97$58.971,004,400
2018-01-10$58.71$58.711,823,100
2018-01-09$56.64$56.64953,800
2018-01-08$53.61$53.61727,000
2018-01-05$54.14$54.14483,100
2018-01-04$54.54$54.541,285,600
2018-01-03$55.89$55.89501,200
2018-01-02$55.22$55.22584,500