NASDAQ:ALNY | Stock Price History | ALNYLAM PHARMACEUTICALS, INC.

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
2004-06-01 to 2026-09-04
Data captured

Stock Price Chart

Blue: Split-adjusted close · Orange: Cumulative dividend-reinvested close

$4.09$10.71$28.07$73.59$192.93$505.752004-06-012026-08-27

Logarithmic scale. Both lines share the same starting value for the selected range.

Historical Stock Price

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2026-09-04$258.50113,205
2026-09-03$267.56112,705
2026-09-02$247.16232,495
2026-09-01$241.47102,746
2026-08-31$235.82101,891
2026-08-28$225.30159,167
2026-08-27$236.56$236.561,293,200$237.5570,463
2026-08-26$239.00$239.001,116,200$239.8165,935
2026-08-25$240.08$240.081,576,200$236.9887,419
2026-08-24$236.01$236.012,134,900$235.50127,710
2026-08-21$236.22$236.221,902,200$228.53179,761
2026-08-20$229.30$229.301,701,700$238.87192,291
2026-08-19$242.61$242.611,879,100$236.05163,011
2026-08-18$228.61$228.611,600,200$224.12140,460
2026-08-17$224.60$224.601,539,200$227.2785,517
2026-08-14$228.65$228.651,525,800$224.85103,645
2026-08-13$227.12$227.121,449,400$224.98107,098
2026-08-12$223.95$223.951,621,200$219.8582,896
2026-08-11$221.20$221.201,438,200$218.7178,600
2026-08-10$216.98$216.981,404,800$220.3666,582
2026-08-07$219.20$219.201,735,900$217.87109,983
2026-08-06$216.12$216.122,274,600$228.95141,729
2026-08-05$228.72$228.722,734,600$221.92266,736
2026-08-04$219.00$219.003,107,600$220.04170,968
2026-08-03$220.33$220.333,399,800$208.04185,249
2026-07-31$205.52$205.524,477,600$205.11299,388
2026-07-30$205.48$205.489,826,800$226.05571,391
2026-07-29$286.62$286.621,301,300$287.2187,066
2026-07-28$288.41$288.411,437,300$282.8571,539
2026-07-27$278.40$278.401,409,600$274.8491,015
2026-07-24$271.77$271.771,150,900$269.4078,854
2026-07-23$268.74$268.741,140,800$265.9579,658
2026-07-22$266.99$266.991,104,600$271.5090,199
2026-07-21$271.37$271.37982,800$273.1177,069
2026-07-20$272.67$272.671,359,300$267.60120,794
2026-07-17$267.47$267.471,378,100
2026-07-16$283.15$283.151,436,200
2026-07-15$279.14$279.141,284,900
2026-07-14$281.26$281.261,093,100
2026-07-13$288.06$288.062,682,700
2026-07-10$298.76$298.762,538,100
2026-07-09$312.79$312.795,865,000
2026-07-08$323.50$323.50897,700
2026-07-07$321.59$321.59980,400
2026-07-06$313.04$313.04891,800
2026-07-02$312.78$312.781,093,400
2026-07-01$301.67$301.671,070,500
2026-06-30$301.03$301.031,411,100
2026-06-29$293.52$293.521,367,300
2026-06-26$291.37$291.371,490,600
2026-06-25$293.17$293.171,128,200
2026-06-24$294.06$294.061,299,600
2026-06-23$288.18$288.181,087,500
2026-06-22$286.41$286.411,420,600
2026-06-18$278.09$278.092,204,500
2026-06-17$282.72$282.721,322,200
2026-06-16$281.90$281.901,213,300
2026-06-15$287.80$287.801,118,500
2026-06-12$282.85$282.851,420,000
2026-06-11$289.39$289.391,061,500
2026-06-10$291.22$291.22927,300
2026-06-09$297.69$297.691,259,800
2026-06-08$292.16$292.161,651,400
2026-06-05$303.05$303.051,004,400
2026-06-04$303.64$303.641,081,400
2026-06-03$292.58$292.58988,800
2026-06-02$286.12$286.121,042,500
2026-06-01$295.63$295.631,186,000
2026-05-29$301.98$301.982,278,000
2026-05-28$305.06$305.061,020,700
2026-05-27$295.63$295.63629,500
2026-05-26$295.50$295.50649,700
2026-05-22$297.45$297.45681,300
2026-05-21$300.51$300.51650,200
2026-05-20$298.48$298.48799,200
2026-05-19$294.30$294.30769,900
2026-05-18$286.27$286.27873,400
2026-05-15$286.98$286.981,149,400
2026-05-14$293.45$293.45889,700
2026-05-13$291.48$291.48975,800
2026-05-12$292.03$292.03826,100
2026-05-11$284.84$284.841,287,600
2026-05-08$295.05$295.05926,800
2026-05-07$295.91$295.911,144,000
2026-05-06$303.00$303.001,012,300
2026-05-05$301.11$301.11823,900
2026-05-04$297.93$297.931,590,500
2026-05-01$296.11$296.111,132,900
2026-04-30$309.49$309.492,192,100
2026-04-29$301.19$301.191,569,600
2026-04-28$302.11$302.11996,200
2026-04-27$308.51$308.511,093,400
2026-04-24$305.54$305.54825,600
2026-04-23$313.79$313.79588,300
2026-04-22$310.58$310.581,003,700
2026-04-21$308.43$308.431,510,800
2026-04-20$310.94$310.94966,400
2026-04-17$309.66$309.661,495,100
2026-04-16$320.13$320.131,022,800
2026-04-15$333.39$333.39799,100