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 — 2009

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2009-12-31$17.62$17.6297,400
2009-12-30$18.08$18.08107,800
2009-12-29$18.02$18.02108,700
2009-12-28$18.23$18.23206,000
2009-12-24$17.98$17.9843,900
2009-12-23$17.79$17.79221,600
2009-12-22$17.36$17.36196,200
2009-12-21$17.21$17.21310,200
2009-12-18$17.48$17.482,008,300
2009-12-17$16.65$16.65299,500
2009-12-16$16.95$16.95256,300
2009-12-15$16.83$16.83190,900
2009-12-14$16.80$16.80182,800
2009-12-11$16.43$16.43106,300
2009-12-10$16.43$16.43329,500
2009-12-09$16.56$16.56258,100
2009-12-08$16.88$16.88406,000
2009-12-07$17.33$17.3392,300
2009-12-04$17.45$17.45260,600
2009-12-03$16.96$16.96280,000
2009-12-02$17.26$17.26163,900
2009-12-01$17.24$17.24175,000
2009-11-30$16.81$16.81205,600
2009-11-27$16.78$16.78137,000
2009-11-25$17.07$17.07162,700
2009-11-24$16.75$16.75270,500
2009-11-23$16.95$16.95107,100
2009-11-20$16.84$16.84137,200
2009-11-19$16.86$16.86180,100
2009-11-18$17.42$17.42167,700
2009-11-17$17.44$17.44282,100
2009-11-16$17.44$17.44467,500
2009-11-13$17.17$17.17348,800
2009-11-12$17.40$17.40659,400
2009-11-11$17.13$17.13536,900
2009-11-10$15.55$15.55451,400
2009-11-09$15.81$15.81657,300
2009-11-06$16.15$16.15589,200
2009-11-05$16.42$16.42814,500
2009-11-04$17.43$17.43306,600
2009-11-03$17.64$17.64287,600
2009-11-02$17.09$17.09256,200
2009-10-30$17.04$17.04290,700
2009-10-29$17.42$17.42306,000
2009-10-28$17.01$17.01324,800
2009-10-27$17.91$17.91204,300
2009-10-26$17.85$17.85249,500
2009-10-23$18.43$18.43237,100
2009-10-22$18.98$18.98295,500
2009-10-21$18.89$18.89270,500
2009-10-20$19.28$19.28268,100
2009-10-19$20.46$20.46255,300
2009-10-16$20.62$20.62209,200
2009-10-15$21.07$21.07213,400
2009-10-14$21.43$21.43258,800
2009-10-13$21.30$21.30116,500
2009-10-12$21.49$21.4969,600
2009-10-09$21.92$21.9287,500
2009-10-08$21.57$21.57230,200
2009-10-07$21.30$21.30110,100
2009-10-06$21.70$21.70108,200
2009-10-05$21.29$21.29122,000
2009-10-02$21.57$21.57143,300
2009-10-01$21.54$21.54174,200
2009-09-30$22.68$22.68136,500
2009-09-29$23.19$23.19108,000
2009-09-28$23.33$23.3399,100
2009-09-25$22.79$22.79166,200
2009-09-24$22.32$22.32136,200
2009-09-23$22.67$22.67111,300
2009-09-22$23.03$23.03134,000
2009-09-21$23.26$23.26116,700
2009-09-18$23.41$23.41259,800
2009-09-17$23.62$23.62149,100
2009-09-16$23.63$23.63147,000
2009-09-15$23.16$23.16192,600
2009-09-14$22.54$22.54143,100
2009-09-11$22.50$22.50104,400
2009-09-10$22.38$22.38144,200
2009-09-09$22.02$22.02164,400
2009-09-08$21.99$21.99125,800
2009-09-04$22.05$22.05143,100
2009-09-03$21.68$21.68247,700
2009-09-02$21.73$21.73366,900
2009-09-01$21.84$21.84210,200
2009-08-31$22.30$22.30329,900
2009-08-28$22.45$22.45160,200
2009-08-27$23.26$23.26162,800
2009-08-26$23.91$23.91238,900
2009-08-25$24.56$24.56554,600
2009-08-24$24.09$24.09436,500
2009-08-21$22.92$22.92330,400
2009-08-20$22.12$22.12180,500
2009-08-19$21.95$21.95237,600
2009-08-18$21.24$21.24191,000
2009-08-17$21.14$21.14165,000
2009-08-14$21.85$21.85223,700
2009-08-13$22.84$22.84341,400
2009-08-12$22.42$22.42456,100
2009-08-11$20.64$20.64219,200
2009-08-10$21.10$21.10160,700
2009-08-07$21.32$21.32321,500
2009-08-06$22.21$22.21281,900
2009-08-05$23.24$23.24308,400
2009-08-04$23.89$23.89236,400
2009-08-03$23.62$23.62195,000
2009-07-31$23.27$23.27164,400
2009-07-30$23.52$23.52149,800
2009-07-29$23.16$23.16214,400
2009-07-28$23.75$23.75206,500
2009-07-27$23.36$23.36112,700
2009-07-24$23.32$23.32163,000
2009-07-23$23.15$23.15456,700
2009-07-22$20.55$20.55151,500
2009-07-21$20.18$20.1884,800
2009-07-20$20.17$20.17188,600
2009-07-17$20.33$20.33194,700
2009-07-16$19.95$19.95198,600
2009-07-15$20.40$20.40252,700
2009-07-14$20.36$20.36184,500
2009-07-13$19.81$19.81155,100
2009-07-10$19.61$19.61177,400
2009-07-09$19.49$19.49261,100
2009-07-08$19.39$19.39230,000
2009-07-07$19.78$19.78168,200
2009-07-06$20.73$20.73202,200
2009-07-02$21.23$21.23173,800
2009-07-01$22.40$22.40158,400
2009-06-30$22.27$22.27223,100
2009-06-29$22.19$22.19126,200
2009-06-26$22.16$22.16362,800
2009-06-25$22.13$22.13124,600
2009-06-24$21.45$21.45177,700
2009-06-23$20.91$20.91196,000
2009-06-22$20.86$20.86193,700
2009-06-19$21.77$21.77711,300
2009-06-18$21.37$21.37167,500
2009-06-17$21.45$21.45190,700
2009-06-16$21.17$21.17223,600
2009-06-15$21.71$21.71441,500
2009-06-12$22.57$22.57168,000
2009-06-11$22.09$22.09237,000
2009-06-10$21.62$21.62363,700
2009-06-09$20.51$20.51328,200
2009-06-08$20.86$20.86627,800
2009-06-05$22.64$22.64161,800
2009-06-04$22.80$22.80162,600
2009-06-03$22.49$22.49217,400
2009-06-02$21.95$21.95303,700
2009-06-01$21.00$21.00332,600
2009-05-29$20.36$20.36405,500
2009-05-28$20.59$20.59215,100
2009-05-27$20.70$20.70255,000
2009-05-26$21.42$21.42283,900
2009-05-22$20.61$20.61231,700
2009-05-21$20.61$20.61328,800
2009-05-20$20.61$20.61488,000
2009-05-19$20.49$20.49340,700
2009-05-18$20.35$20.35261,700
2009-05-15$19.43$19.43324,900
2009-05-14$19.70$19.70377,100
2009-05-13$19.51$19.51399,000
2009-05-12$21.12$21.12440,600
2009-05-11$21.70$21.70731,800
2009-05-08$19.96$19.96712,100
2009-05-07$18.06$18.06428,900
2009-05-06$18.37$18.37433,200
2009-05-05$18.62$18.62353,100
2009-05-04$19.00$19.00420,000
2009-05-01$18.18$18.18264,400
2009-04-30$18.34$18.34392,800
2009-04-29$18.40$18.40342,200
2009-04-28$17.33$17.33400,400
2009-04-27$17.04$17.04316,300
2009-04-24$16.98$16.98273,300
2009-04-23$16.34$16.34283,300
2009-04-22$17.05$17.05228,800
2009-04-21$17.86$17.86209,300
2009-04-20$17.53$17.53264,800
2009-04-17$18.72$18.72153,000
2009-04-16$18.79$18.79144,100
2009-04-15$18.51$18.51273,400
2009-04-14$18.26$18.26216,400
2009-04-13$19.26$19.26164,200
2009-04-09$19.80$19.80228,300
2009-04-08$18.57$18.57111,300
2009-04-07$18.22$18.22185,800
2009-04-06$18.88$18.88235,600
2009-04-03$19.75$19.75275,100
2009-04-02$20.14$20.14427,700
2009-04-01$18.66$18.66204,900
2009-03-31$19.04$19.04215,900
2009-03-30$18.63$18.63187,500
2009-03-27$18.98$18.98222,900
2009-03-26$19.47$19.47409,700
2009-03-25$18.61$18.61273,500
2009-03-24$18.39$18.39289,200
2009-03-23$19.47$19.47786,300
2009-03-20$18.71$18.712,338,900
2009-03-19$17.29$17.29219,900
2009-03-18$17.61$17.61326,000
2009-03-17$18.09$18.09167,700
2009-03-16$17.51$17.51284,500
2009-03-13$17.86$17.86229,400
2009-03-12$17.42$17.42283,400
2009-03-11$16.27$16.27191,700
2009-03-10$16.86$16.86428,700
2009-03-09$15.14$15.14448,900
2009-03-06$15.79$15.79554,600
2009-03-05$15.57$15.57789,000
2009-03-04$16.41$16.41440,200
2009-03-03$16.01$16.01550,900
2009-03-02$16.18$16.18864,900
2009-02-27$18.44$18.44335,100
2009-02-26$19.32$19.32351,200
2009-02-25$20.39$20.39499,500
2009-02-24$20.79$20.79392,700
2009-02-23$19.70$19.70300,900
2009-02-20$19.40$19.40276,600
2009-02-19$20.02$20.02344,700
2009-02-18$20.75$20.75152,200
2009-02-17$21.06$21.06239,700
2009-02-13$22.40$22.40119,700
2009-02-12$22.59$22.59357,900
2009-02-11$22.16$22.16132,800
2009-02-10$22.10$22.10259,200
2009-02-09$23.17$23.17223,300
2009-02-06$22.67$22.67183,800
2009-02-05$21.91$21.91204,400
2009-02-04$21.62$21.62226,900
2009-02-03$21.94$21.94334,400
2009-02-02$21.11$21.11195,000
2009-01-30$21.09$21.09183,300
2009-01-29$21.30$21.30196,500
2009-01-28$22.55$22.55194,400
2009-01-27$22.63$22.63234,600
2009-01-26$21.98$21.98234,300
2009-01-23$21.51$21.51294,200
2009-01-22$20.85$20.85189,100
2009-01-21$22.00$22.00238,500
2009-01-20$20.51$20.51528,700
2009-01-16$23.05$23.05159,200
2009-01-15$22.89$22.89225,000
2009-01-14$22.24$22.24156,300
2009-01-13$23.40$23.40114,400
2009-01-12$22.60$22.60220,100
2009-01-09$23.12$23.12391,000
2009-01-08$24.00$24.00325,400
2009-01-07$24.32$24.32331,000
2009-01-06$25.94$25.94263,500
2009-01-05$25.44$25.44188,800
2009-01-02$25.15$25.15154,900