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 — 2018

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2018-12-31$72.91$72.91794,700
2018-12-28$70.40$70.40794,100
2018-12-27$68.59$68.59690,800
2018-12-26$68.10$68.101,966,800
2018-12-24$62.67$62.67537,400
2018-12-21$63.30$63.301,452,800
2018-12-20$65.81$65.811,040,500
2018-12-19$68.38$68.38872,900
2018-12-18$72.54$72.541,016,200
2018-12-17$74.30$74.30900,100
2018-12-14$77.13$77.13688,900
2018-12-13$75.66$75.66779,000
2018-12-12$79.50$79.50499,300
2018-12-11$76.79$76.79691,700
2018-12-10$76.69$76.69800,900
2018-12-07$74.38$74.381,100,000
2018-12-06$79.73$79.731,056,300
2018-12-04$78.35$78.35821,900
2018-12-03$84.29$84.29874,900
2018-11-30$81.16$81.16775,600
2018-11-29$80.61$80.61843,700
2018-11-28$78.02$78.02629,000
2018-11-27$77.91$77.91551,900
2018-11-26$78.35$78.35688,000
2018-11-23$73.34$73.34251,900
2018-11-21$72.68$72.68575,600
2018-11-20$72.66$72.66846,900
2018-11-19$71.48$71.48972,100
2018-11-16$73.16$73.16883,200
2018-11-15$69.37$69.37969,300
2018-11-14$65.07$65.071,361,700
2018-11-13$67.31$67.31900,400
2018-11-12$67.92$67.92937,800
2018-11-09$72.41$72.41800,700
2018-11-08$73.04$73.041,417,200
2018-11-07$76.05$76.053,040,500
2018-11-06$86.28$86.281,184,200
2018-11-05$88.16$88.16753,600
2018-11-02$88.26$88.26810,900
2018-11-01$88.13$88.13946,800
2018-10-31$80.43$80.43723,200
2018-10-30$78.01$78.01659,600
2018-10-29$73.90$73.90944,900
2018-10-26$76.75$76.75799,900
2018-10-25$77.92$77.92870,800
2018-10-24$73.00$73.001,165,000
2018-10-23$76.60$76.601,033,900
2018-10-22$74.95$74.95775,300
2018-10-19$76.65$76.65974,200
2018-10-18$78.59$78.59715,500
2018-10-17$81.26$81.26451,200
2018-10-16$82.91$82.91591,700
2018-10-15$80.01$80.01513,600
2018-10-12$81.95$81.95750,800
2018-10-11$79.30$79.30847,700
2018-10-10$80.99$80.991,200,100
2018-10-09$81.68$81.68791,500
2018-10-08$83.24$83.24809,900
2018-10-05$86.75$86.75865,400
2018-10-04$86.22$86.22647,000
2018-10-03$88.18$88.18514,000
2018-10-02$87.20$87.20722,900
2018-10-01$88.33$88.33640,500
2018-09-28$87.52$87.521,170,000
2018-09-27$90.09$90.091,908,700
2018-09-26$91.33$91.33651,200
2018-09-25$93.89$93.89577,900
2018-09-24$93.26$93.26563,700
2018-09-21$94.57$94.57798,700
2018-09-20$95.21$95.21523,100
2018-09-19$94.82$94.82518,200
2018-09-18$93.75$93.75552,700
2018-09-17$93.35$93.35705,900
2018-09-14$97.14$97.14820,200
2018-09-13$94.96$94.961,191,700
2018-09-12$94.75$94.752,614,300
2018-09-11$100.35$100.351,137,300
2018-09-10$104.25$104.251,049,700
2018-09-07$109.00$109.00772,900
2018-09-06$112.13$112.13574,500
2018-09-05$118.08$118.08584,800
2018-09-04$119.12$119.12887,600
2018-08-31$122.67$122.67604,800
2018-08-30$121.88$121.88780,900
2018-08-29$119.10$119.10883,800
2018-08-28$117.55$117.551,393,900
2018-08-27$112.59$112.593,340,100
2018-08-24$96.87$96.87935,800
2018-08-23$96.99$96.99874,400
2018-08-22$97.88$97.88648,700
2018-08-21$97.50$97.50660,800
2018-08-20$96.37$96.37986,200
2018-08-17$94.58$94.58635,900
2018-08-16$92.95$92.95619,500
2018-08-15$91.22$91.221,051,200
2018-08-14$93.18$93.181,041,400
2018-08-13$90.95$90.954,006,900
2018-08-10$97.38$97.38663,000
2018-08-09$94.25$94.251,400,700
2018-08-08$92.97$92.97832,200
2018-08-07$93.88$93.88986,200
2018-08-06$93.07$93.071,303,800
2018-08-03$91.65$91.651,056,100
2018-08-02$95.22$95.221,091,600
2018-08-01$94.49$94.49809,300
2018-07-31$95.00$95.00886,900
2018-07-30$96.81$96.811,328,500
2018-07-27$104.51$104.51654,600
2018-07-26$106.55$106.55754,700
2018-07-25$105.74$105.74646,900
2018-07-24$102.66$102.66565,300
2018-07-23$105.71$105.71489,500
2018-07-20$105.93$105.93418,300
2018-07-19$106.26$106.26426,700
2018-07-18$105.37$105.37555,400
2018-07-17$102.27$102.27506,800
2018-07-16$102.76$102.76896,400
2018-07-13$107.47$107.47425,200
2018-07-12$108.05$108.05489,900
2018-07-11$105.88$105.88440,500
2018-07-10$104.73$104.73741,300
2018-07-09$102.78$102.78562,400
2018-07-06$101.03$101.03519,900
2018-07-05$98.05$98.05730,800
2018-07-03$98.62$98.62310,100
2018-07-02$98.08$98.08547,200
2018-06-29$98.49$98.49730,500
2018-06-28$97.17$97.17602,000
2018-06-27$96.07$96.07494,200
2018-06-26$98.51$98.51790,300
2018-06-25$100.04$100.04520,200
2018-06-22$104.20$104.20711,400
2018-06-21$102.69$102.69348,100
2018-06-20$105.26$105.26515,100
2018-06-19$104.62$104.62664,500
2018-06-18$106.23$106.23806,800
2018-06-15$107.80$107.801,116,600
2018-06-14$107.06$107.06645,600
2018-06-13$102.86$102.86738,600
2018-06-12$105.91$105.91869,600
2018-06-11$100.05$100.05382,900
2018-06-08$100.24$100.24434,700
2018-06-07$99.91$99.91618,800
2018-06-06$101.66$101.66594,000
2018-06-05$101.02$101.02575,000
2018-06-04$101.00$101.00688,500
2018-06-01$100.65$100.65945,000
2018-05-31$99.47$99.47744,200
2018-05-30$100.46$100.46591,000
2018-05-29$100.06$100.06661,100
2018-05-25$99.98$99.98531,000
2018-05-24$98.97$98.97448,300
2018-05-23$98.10$98.10617,600
2018-05-22$98.96$98.96544,300
2018-05-21$100.80$100.80616,700
2018-05-18$102.81$102.81731,500
2018-05-17$101.64$101.64865,700
2018-05-16$101.59$101.59972,500
2018-05-15$101.99$101.99792,300
2018-05-14$103.13$103.131,297,200
2018-05-11$100.91$100.91856,800
2018-05-10$98.28$98.28909,600
2018-05-09$97.09$97.09593,600
2018-05-08$96.14$96.141,698,200
2018-05-07$97.42$97.421,099,400
2018-05-04$92.35$92.352,877,500
2018-05-03$88.31$88.31922,800
2018-05-02$90.02$90.021,297,700
2018-05-01$92.18$92.181,270,400
2018-04-30$94.53$94.53680,400
2018-04-27$96.63$96.63515,800
2018-04-26$95.30$95.30607,000
2018-04-25$94.33$94.33707,200
2018-04-24$94.73$94.73948,900
2018-04-23$95.86$95.86677,200
2018-04-20$97.48$97.481,285,500
2018-04-19$96.19$96.19681,500
2018-04-18$97.70$97.70695,900
2018-04-17$98.35$98.35992,000
2018-04-16$95.84$95.841,065,800
2018-04-13$100.76$100.76577,700
2018-04-12$100.75$100.75627,500
2018-04-11$97.63$97.63876,000
2018-04-10$98.08$98.081,350,300
2018-04-09$97.33$97.331,094,000
2018-04-06$95.08$95.081,958,500
2018-04-05$96.44$96.441,468,100
2018-04-04$102.29$102.291,946,000
2018-04-03$99.41$99.412,497,400
2018-04-02$101.18$101.185,781,600
2018-03-29$119.10$119.103,171,100
2018-03-28$129.87$129.87863,900
2018-03-27$131.18$131.18844,200
2018-03-26$138.51$138.51911,300
2018-03-23$138.06$138.06741,600
2018-03-22$142.50$142.50414,200
2018-03-21$146.26$146.26486,600
2018-03-20$148.54$148.541,018,600
2018-03-19$146.56$146.561,048,200
2018-03-16$145.06$145.061,512,100
2018-03-15$141.38$141.38662,700
2018-03-14$141.83$141.831,001,300
2018-03-13$144.16$144.161,923,400
2018-03-12$142.04$142.041,336,900
2018-03-09$133.02$133.02923,500
2018-03-08$126.74$126.74434,800
2018-03-07$123.99$123.99788,200
2018-03-06$123.25$123.25681,800
2018-03-05$126.58$126.58747,200
2018-03-02$121.16$121.16464,900
2018-03-01$119.13$119.13620,200
2018-02-28$120.16$120.16680,100
2018-02-27$123.29$123.29427,300
2018-02-26$123.00$123.00564,000
2018-02-23$121.42$121.42395,400
2018-02-22$119.86$119.86416,900
2018-02-21$119.18$119.18559,100
2018-02-20$120.83$120.83396,100
2018-02-16$122.88$122.88653,500
2018-02-15$121.74$121.74736,300
2018-02-14$119.98$119.98497,800
2018-02-13$119.26$119.26508,000
2018-02-12$117.30$117.30566,600
2018-02-09$115.92$115.921,304,400
2018-02-08$116.32$116.32978,300
2018-02-07$122.09$122.09714,300
2018-02-06$122.17$122.171,223,200
2018-02-05$119.92$119.92997,900
2018-02-02$124.50$124.50787,400
2018-02-01$129.43$129.43824,500
2018-01-31$129.98$129.98553,200
2018-01-30$131.23$131.23832,300
2018-01-29$133.56$133.56909,100
2018-01-26$134.39$134.39526,800
2018-01-25$134.29$134.291,069,700
2018-01-24$133.89$133.89978,000
2018-01-23$137.03$137.032,768,300
2018-01-22$131.00$131.002,003,200
2018-01-19$124.83$124.83883,800
2018-01-18$123.99$123.99547,100
2018-01-17$125.25$125.251,147,600
2018-01-16$124.64$124.64950,600
2018-01-12$129.07$129.07796,500
2018-01-11$128.05$128.05565,200
2018-01-10$128.60$128.60695,500
2018-01-09$130.74$130.74754,900
2018-01-08$129.18$129.181,129,800
2018-01-05$127.73$127.73718,700
2018-01-04$131.96$131.96777,100
2018-01-03$134.65$134.65709,300
2018-01-02$131.85$131.85440,400