NASDAQ:ALNY | Historical Stock Price | 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.

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Historical Stock Price — 2025

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2025-12-31$397.65$397.65768,900
2025-12-30$397.25$397.25504,800
2025-12-29$398.82$398.82638,400
2025-12-26$400.59$400.59401,500
2025-12-24$400.69$400.69408,200
2025-12-23$398.70$398.70792,300
2025-12-22$407.73$407.731,053,000
2025-12-19$400.23$400.2312,576,500
2025-12-18$396.04$396.041,715,000
2025-12-17$392.10$392.101,041,500
2025-12-16$391.17$391.171,345,500
2025-12-15$391.50$391.501,483,300
2025-12-12$397.55$397.551,659,000
2025-12-11$412.63$412.631,284,800
2025-12-10$404.46$404.461,188,900
2025-12-09$415.21$415.211,610,500
2025-12-08$430.02$430.022,411,600
2025-12-05$458.12$458.12627,300
2025-12-04$465.34$465.34984,000
2025-12-03$473.29$473.291,092,900
2025-12-02$464.93$464.931,204,100
2025-12-01$454.56$454.561,070,600
2025-11-28$451.23$451.23563,900
2025-11-26$445.12$445.12908,200
2025-11-25$429.80$429.801,009,200
2025-11-24$434.23$434.231,750,400
2025-11-21$436.38$436.381,298,000
2025-11-20$445.79$445.79787,600
2025-11-19$460.76$460.76893,800
2025-11-18$462.30$462.30668,600
2025-11-17$460.54$460.54962,100
2025-11-14$449.16$449.16968,500
2025-11-13$453.97$453.97798,900
2025-11-12$452.74$452.74937,700
2025-11-11$451.95$451.95981,700
2025-11-10$441.70$441.70739,000
2025-11-07$442.70$442.70822,600
2025-11-06$440.49$440.49700,500
2025-11-05$434.56$434.56974,500
2025-11-04$423.47$423.471,170,100
2025-11-03$434.07$434.071,556,500
2025-10-31$456.04$456.041,817,600
2025-10-30$449.56$449.562,313,900
2025-10-29$481.59$481.591,360,100
2025-10-28$475.91$475.91836,300
2025-10-27$478.58$478.581,174,500
2025-10-24$463.43$463.43771,300
2025-10-23$464.00$464.00683,300
2025-10-22$464.90$464.90950,000
2025-10-21$474.00$474.00826,200
2025-10-20$491.22$491.22950,000
2025-10-17$481.67$481.671,029,200
2025-10-16$481.07$481.07964,700
2025-10-15$470.27$470.271,475,400
2025-10-14$469.36$469.361,435,700
2025-10-13$464.95$464.951,579,100
2025-10-10$460.46$460.46937,000
2025-10-09$456.95$456.951,052,000
2025-10-08$450.68$450.68929,800
2025-10-07$459.58$459.58791,800
2025-10-06$452.00$452.00918,500
2025-10-03$456.35$456.35969,100
2025-10-02$460.99$460.991,269,200
2025-10-01$460.65$460.651,370,000
2025-09-30$456.00$456.001,379,500
2025-09-29$447.49$447.49719,000
2025-09-26$446.40$446.40813,000
2025-09-25$449.58$449.58685,300
2025-09-24$458.37$458.37976,000
2025-09-23$454.41$454.411,024,600
2025-09-22$458.92$458.92971,800
2025-09-19$453.56$453.561,713,300
2025-09-18$452.17$452.171,061,000
2025-09-17$451.73$451.731,445,600
2025-09-16$461.24$461.24773,300
2025-09-15$461.14$461.14910,100
2025-09-12$465.89$465.89630,800
2025-09-11$468.58$468.581,005,300
2025-09-10$469.31$469.311,817,400
2025-09-09$482.13$482.133,217,400
2025-09-08$455.03$455.03926,000
2025-09-05$452.00$452.00751,500
2025-09-04$453.54$453.54714,300
2025-09-03$447.43$447.431,301,100
2025-09-02$447.00$447.001,072,100
2025-08-29$446.51$446.51827,600
2025-08-28$452.33$452.33641,000
2025-08-27$454.18$454.18906,700
2025-08-26$451.20$451.201,183,700
2025-08-25$443.64$443.641,200,000
2025-08-22$454.38$454.381,075,500
2025-08-21$467.55$467.55760,100
2025-08-20$458.31$458.311,223,500
2025-08-19$458.28$458.281,322,100
2025-08-18$456.87$456.871,608,800
2025-08-15$448.91$448.91713,400
2025-08-14$442.73$442.731,263,500
2025-08-13$432.52$432.522,094,400
2025-08-12$429.93$429.931,507,700
2025-08-11$435.00$435.00988,600
2025-08-08$438.93$438.93901,300
2025-08-07$435.10$435.101,152,700
2025-08-06$428.14$428.141,181,800
2025-08-05$418.91$418.911,807,600
2025-08-04$419.56$419.561,455,500
2025-08-01$401.80$401.801,781,300
2025-07-31$392.24$392.243,353,500
2025-07-30$339.80$339.802,058,300
2025-07-29$330.55$330.55862,500
2025-07-28$324.79$324.791,032,000
2025-07-25$328.81$328.81666,700
2025-07-24$328.00$328.00677,100
2025-07-23$325.64$325.64912,200
2025-07-22$325.28$325.281,273,700
2025-07-21$320.52$320.52744,500
2025-07-18$320.53$320.53581,300
2025-07-17$324.69$324.69744,600
2025-07-16$322.81$322.811,234,200
2025-07-15$311.12$311.12927,200
2025-07-14$315.75$315.75629,600
2025-07-11$314.94$314.941,081,900
2025-07-10$322.64$322.64489,400
2025-07-09$320.87$320.871,039,500
2025-07-08$317.50$317.50973,000
2025-07-07$324.13$324.131,294,500
2025-07-03$331.91$331.91431,200
2025-07-02$329.77$329.77967,700
2025-07-01$322.06$322.061,240,100
2025-06-30$326.09$326.09943,600
2025-06-27$322.83$322.832,052,200
2025-06-26$318.25$318.25663,900
2025-06-25$321.94$321.94632,600
2025-06-24$325.00$325.001,000,000
2025-06-23$313.13$313.13503,100
2025-06-20$309.70$309.701,336,700
2025-06-18$312.32$312.32981,200
2025-06-17$308.71$308.71570,600
2025-06-16$308.78$308.78520,200
2025-06-13$307.99$307.99571,900
2025-06-12$304.67$304.67874,900
2025-06-11$298.58$298.58456,400
2025-06-10$302.46$302.46515,100
2025-06-09$304.00$304.00609,600
2025-06-06$300.83$300.83954,800
2025-06-05$308.00$308.00761,200
2025-06-04$305.31$305.31563,100
2025-06-03$303.77$303.77965,300
2025-06-02$306.09$306.091,131,600
2025-05-30$304.56$304.563,116,200
2025-05-29$292.90$292.90965,800
2025-05-28$285.56$285.56905,300
2025-05-27$290.10$290.10737,900
2025-05-23$289.96$289.96757,000
2025-05-22$289.00$289.00615,000
2025-05-21$292.58$292.58930,200
2025-05-20$291.68$291.68627,300
2025-05-19$291.86$291.86929,500
2025-05-16$285.31$285.311,193,500
2025-05-15$283.40$283.401,264,500
2025-05-14$267.55$267.55700,400
2025-05-13$266.86$266.86723,500
2025-05-12$270.19$270.191,252,000
2025-05-09$251.15$251.15656,400
2025-05-08$258.35$258.351,704,400
2025-05-07$276.55$276.55763,300
2025-05-06$269.81$269.811,564,100
2025-05-05$273.55$273.551,233,400
2025-05-02$259.39$259.39729,700
2025-05-01$255.13$255.131,519,700
2025-04-30$263.24$263.24949,400
2025-04-29$257.19$257.19941,500
2025-04-28$254.85$254.85510,800
2025-04-25$251.56$251.56836,400
2025-04-24$242.61$242.61678,900
2025-04-23$241.97$241.97752,800
2025-04-22$236.75$236.75885,900
2025-04-21$232.75$232.75796,400
2025-04-17$234.56$234.56601,300
2025-04-16$230.50$230.501,010,700
2025-04-15$230.93$230.931,025,900
2025-04-14$240.01$240.01926,600
2025-04-11$237.77$237.771,577,300
2025-04-10$226.28$226.281,655,800
2025-04-09$243.27$243.272,100,100
2025-04-08$224.32$224.321,033,500
2025-04-07$232.95$232.951,561,100
2025-04-04$235.74$235.741,881,600
2025-04-03$262.16$262.161,028,400
2025-04-02$266.83$266.83886,900
2025-04-01$255.76$255.76868,400
2025-03-31$270.02$270.021,068,200
2025-03-28$268.46$268.46684,800
2025-03-27$271.02$271.02984,100
2025-03-26$269.21$269.211,073,900
2025-03-25$280.96$280.961,065,400
2025-03-24$290.70$290.701,768,100
2025-03-21$283.34$283.343,150,300
2025-03-20$253.55$253.55799,100
2025-03-19$253.44$253.44987,400
2025-03-18$244.30$244.30873,900
2025-03-17$253.11$253.11598,200
2025-03-14$241.76$241.76478,800
2025-03-13$241.75$241.75475,300
2025-03-12$242.43$242.43593,000
2025-03-11$238.74$238.74603,100
2025-03-10$233.07$233.07566,300
2025-03-07$244.52$244.52476,100
2025-03-06$248.13$248.13570,700
2025-03-05$249.23$249.23645,300
2025-03-04$242.93$242.93545,600
2025-03-03$243.53$243.53833,600
2025-02-28$246.75$246.751,178,600
2025-02-27$237.10$237.101,157,400
2025-02-26$243.86$243.86687,300
2025-02-25$245.20$245.201,242,100
2025-02-24$248.94$248.94689,100
2025-02-21$250.59$250.59653,600
2025-02-20$251.00$251.00727,800
2025-02-19$250.51$250.51766,500
2025-02-18$250.00$250.00910,300
2025-02-14$256.45$256.45806,000
2025-02-13$264.89$264.89769,200
2025-02-12$265.96$265.96820,700
2025-02-11$268.99$268.99283,000
2025-02-10$274.06$274.06823,800
2025-02-07$276.19$276.19469,100
2025-02-06$278.25$278.25528,600
2025-02-05$276.31$276.31750,000
2025-02-04$271.00$271.00743,000
2025-02-03$274.55$274.55779,400
2025-01-31$271.31$271.31648,100
2025-01-30$277.16$277.16561,200
2025-01-29$273.99$273.99381,800
2025-01-28$279.19$279.19611,300
2025-01-27$276.73$276.73785,900
2025-01-24$278.76$278.76924,200
2025-01-23$275.54$275.54686,500
2025-01-22$266.54$266.54746,400
2025-01-21$264.99$264.99938,900
2025-01-17$246.27$246.27558,100
2025-01-16$249.16$249.16683,900
2025-01-15$251.01$251.01871,000
2025-01-14$240.51$240.51783,800
2025-01-13$258.27$258.271,224,400
2025-01-10$237.98$237.98706,100
2025-01-08$240.55$240.55654,000
2025-01-07$235.95$235.95629,000
2025-01-06$233.15$233.15561,500
2025-01-03$234.28$234.28411,200
2025-01-02$233.62$233.62392,700