NASDAQ:BIIB | Historical Stock Price | BIOGEN 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
1991-09-17 to 2026-09-04
Data captured

Stock Price Chart

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

$0.34$1.42$6.01$25.38$107.26$453.211991-09-172026-08-27

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

View year

Historical Stock Price — 2013

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2013-12-31$279.57$279.57640,600
2013-12-30$279.57$279.57605,200
2013-12-27$277.17$277.17609,600
2013-12-26$281.34$281.34620,600
2013-12-24$280.65$280.65463,300
2013-12-23$281.61$281.611,075,900
2013-12-20$283.34$283.343,027,500
2013-12-19$277.21$277.21955,800
2013-12-18$280.64$280.641,870,500
2013-12-17$271.51$271.511,253,000
2013-12-16$273.60$273.601,178,300
2013-12-13$275.32$275.321,167,300
2013-12-12$277.87$277.87993,600
2013-12-11$278.04$278.041,270,200
2013-12-10$285.23$285.23937,500
2013-12-09$286.18$286.181,190,000
2013-12-06$290.90$290.901,214,500
2013-12-05$284.92$284.921,159,000
2013-12-04$285.82$285.82900,200
2013-12-03$287.76$287.761,419,500
2013-12-02$294.84$294.841,128,500
2013-11-29$290.97$290.97514,200
2013-11-27$293.83$293.83939,700
2013-11-26$289.20$289.201,584,800
2013-11-25$295.88$295.882,727,900
2013-11-22$285.62$285.624,698,000
2013-11-21$252.43$252.431,399,500
2013-11-20$246.12$246.121,014,400
2013-11-19$245.46$245.461,203,500
2013-11-18$241.27$241.271,224,200
2013-11-15$245.09$245.091,579,700
2013-11-14$237.58$237.58680,900
2013-11-13$236.10$236.101,006,000
2013-11-12$235.62$235.62991,100
2013-11-11$234.79$234.79770,400
2013-11-08$236.69$236.691,095,900
2013-11-07$231.19$231.191,444,900
2013-11-06$238.48$238.481,046,700
2013-11-05$244.06$244.06995,300
2013-11-04$240.07$240.07942,200
2013-11-01$243.10$243.101,593,300
2013-10-31$244.19$244.191,176,100
2013-10-30$248.95$248.95934,500
2013-10-29$254.39$254.39875,300
2013-10-28$254.43$254.432,578,800
2013-10-25$252.26$252.261,350,800
2013-10-24$249.22$249.221,035,000
2013-10-23$251.12$251.12993,500
2013-10-22$250.60$250.601,240,300
2013-10-21$243.07$243.07776,000
2013-10-18$244.90$244.901,122,400
2013-10-17$247.10$247.10932,700
2013-10-16$241.18$241.181,149,400
2013-10-15$236.47$236.47765,700
2013-10-14$238.84$238.84701,800
2013-10-11$234.80$234.80895,300
2013-10-10$234.17$234.171,185,000
2013-10-09$223.85$223.851,429,600
2013-10-08$225.50$225.501,556,400
2013-10-07$236.59$236.59911,400
2013-10-04$240.30$240.301,326,000
2013-10-03$233.84$233.841,683,000
2013-10-02$246.23$246.23849,300
2013-10-01$244.92$244.92914,800
2013-09-30$240.76$240.76924,500
2013-09-27$244.82$244.821,118,900
2013-09-26$243.05$243.05989,200
2013-09-25$241.51$241.51872,300
2013-09-24$243.54$243.54849,100
2013-09-23$242.67$242.671,059,900
2013-09-20$248.13$248.131,673,300
2013-09-19$247.98$247.981,395,600
2013-09-18$246.35$246.351,606,300
2013-09-17$240.05$240.05797,900
2013-09-16$239.57$239.571,042,600
2013-09-13$234.71$234.71650,400
2013-09-12$234.11$234.111,112,200
2013-09-11$236.27$236.271,220,800
2013-09-10$228.69$228.69932,200
2013-09-09$228.86$228.86891,600
2013-09-06$225.18$225.181,256,400
2013-09-05$227.70$227.701,074,700
2013-09-04$230.59$230.591,905,400
2013-09-03$221.79$221.791,223,400
2013-08-30$213.02$213.021,002,300
2013-08-29$214.13$214.13859,700
2013-08-28$209.71$209.71809,600
2013-08-27$207.65$207.65725,900
2013-08-26$212.34$212.34803,100
2013-08-23$211.38$211.38608,700
2013-08-22$211.48$211.48612,400
2013-08-21$208.08$208.08999,500
2013-08-20$206.55$206.55736,400
2013-08-19$206.87$206.87639,800
2013-08-16$206.89$206.891,252,200
2013-08-15$206.53$206.53814,900
2013-08-14$211.52$211.521,054,800
2013-08-13$211.25$211.251,775,900
2013-08-12$206.89$206.891,958,700
2013-08-09$212.35$212.351,028,900
2013-08-08$216.89$216.89807,800
2013-08-07$217.76$217.761,114,500
2013-08-06$221.82$221.82771,200
2013-08-05$227.57$227.57969,800
2013-08-02$227.76$227.761,529,600
2013-08-01$220.20$220.201,119,600
2013-07-31$218.13$218.131,202,900
2013-07-30$216.93$216.931,798,000
2013-07-29$215.96$215.961,429,100
2013-07-26$223.23$223.231,403,400
2013-07-25$227.48$227.482,392,700
2013-07-24$226.61$226.611,455,800
2013-07-23$222.65$222.651,723,300
2013-07-22$231.67$231.672,486,000
2013-07-19$230.27$230.271,592,600
2013-07-18$223.12$223.12813,700
2013-07-17$225.10$225.101,025,100
2013-07-16$222.85$222.851,063,500
2013-07-15$224.33$224.33810,500
2013-07-12$226.34$226.341,360,600
2013-07-11$223.30$223.301,260,900
2013-07-10$219.70$219.70857,700
2013-07-09$219.26$219.26829,100
2013-07-08$218.07$218.07943,600
2013-07-05$221.65$221.65806,100
2013-07-03$217.50$217.50362,300
2013-07-02$216.65$216.651,172,500
2013-07-01$217.88$217.881,523,000
2013-06-28$215.20$215.203,110,400
2013-06-27$208.81$208.811,400,700
2013-06-26$208.43$208.431,477,600
2013-06-25$199.15$199.151,199,500
2013-06-24$200.46$200.461,820,100
2013-06-21$199.07$199.073,518,200
2013-06-20$199.58$199.581,937,200
2013-06-19$203.80$203.801,213,600
2013-06-18$210.80$210.801,440,700
2013-06-17$207.75$207.751,650,000
2013-06-14$211.99$211.991,569,400
2013-06-13$209.58$209.582,011,600
2013-06-12$206.55$206.552,778,600
2013-06-11$223.03$223.031,331,800
2013-06-10$222.19$222.191,020,900
2013-06-07$225.02$225.021,722,400
2013-06-06$221.19$221.191,612,200
2013-06-05$214.10$214.102,335,600
2013-06-04$219.74$219.742,515,100
2013-06-03$227.39$227.392,464,200
2013-05-31$237.49$237.491,337,300
2013-05-30$238.89$238.891,268,000
2013-05-29$238.99$238.991,143,900
2013-05-28$240.86$240.861,451,800
2013-05-24$235.24$235.24825,900
2013-05-23$232.62$232.621,231,200
2013-05-22$233.07$233.071,404,900
2013-05-21$231.33$231.331,364,500
2013-05-20$225.18$225.181,281,700
2013-05-17$226.85$226.851,243,900
2013-05-16$227.99$227.991,592,700
2013-05-15$227.13$227.13933,800
2013-05-14$229.84$229.841,972,300
2013-05-13$222.74$222.741,593,200
2013-05-10$213.22$213.221,108,500
2013-05-09$209.28$209.281,027,600
2013-05-08$210.71$210.711,141,500
2013-05-07$212.55$212.551,119,600
2013-05-06$215.73$215.73942,200
2013-05-03$218.85$218.85922,300
2013-05-02$217.30$217.301,124,500
2013-05-01$214.33$214.331,236,200
2013-04-30$218.93$218.931,622,000
2013-04-29$223.61$223.612,066,300
2013-04-26$213.59$213.591,083,400
2013-04-25$216.00$216.001,984,800
2013-04-24$206.18$206.181,584,900
2013-04-23$212.76$212.761,971,700
2013-04-22$215.20$215.202,678,300
2013-04-19$203.27$203.27942,600
2013-04-18$198.66$198.66978,800
2013-04-17$204.08$204.081,310,000
2013-04-16$202.13$202.131,308,100
2013-04-15$198.75$198.751,409,100
2013-04-12$207.01$207.011,833,700
2013-04-11$200.26$200.26884,900
2013-04-10$198.34$198.34887,300
2013-04-09$193.17$193.17746,400
2013-04-08$194.13$194.13709,200
2013-04-05$193.31$193.311,317,900
2013-04-04$195.68$195.681,199,200
2013-04-03$195.74$195.741,824,400
2013-04-02$198.19$198.192,039,300
2013-04-01$192.77$192.772,067,300
2013-03-28$192.62$192.623,995,000
2013-03-27$182.68$182.682,458,200
2013-03-26$177.09$177.091,232,700
2013-03-25$176.22$176.221,136,600
2013-03-22$178.00$178.00929,300
2013-03-21$176.55$176.551,047,800
2013-03-20$178.10$178.10830,800
2013-03-19$175.61$175.611,236,400
2013-03-18$175.52$175.52871,000
2013-03-15$176.78$176.782,049,500
2013-03-14$176.78$176.781,041,800
2013-03-13$176.15$176.151,191,500
2013-03-12$176.05$176.051,944,700
2013-03-11$174.14$174.141,092,200
2013-03-08$172.38$172.381,165,600
2013-03-07$171.47$171.47968,900
2013-03-06$172.45$172.451,074,000
2013-03-05$171.31$171.311,371,200
2013-03-04$169.96$169.961,230,100
2013-03-01$168.70$168.701,710,900
2013-02-28$166.34$166.341,212,200
2013-02-27$166.06$166.061,034,600
2013-02-26$161.99$161.991,381,100
2013-02-25$161.36$161.361,215,800
2013-02-22$164.40$164.40746,700
2013-02-21$162.60$162.601,162,500
2013-02-20$164.77$164.771,540,500
2013-02-19$166.81$166.811,127,700
2013-02-15$168.74$168.741,934,000
2013-02-14$164.59$164.591,203,600
2013-02-13$165.91$165.911,378,100
2013-02-12$165.45$165.451,079,900
2013-02-11$163.96$163.961,036,200
2013-02-08$164.44$164.441,164,000
2013-02-07$160.30$160.301,193,200
2013-02-06$160.98$160.982,857,700
2013-02-05$157.36$157.36830,100
2013-02-04$155.73$155.731,205,600
2013-02-01$157.30$157.301,162,000
2013-01-31$156.08$156.081,337,000
2013-01-30$155.08$155.081,719,000
2013-01-29$153.92$153.922,203,500
2013-01-28$149.99$149.992,993,000
2013-01-25$146.20$146.201,183,000
2013-01-24$146.41$146.412,116,100
2013-01-23$143.55$143.551,110,200
2013-01-22$144.86$144.861,395,800
2013-01-18$144.28$144.281,838,400
2013-01-17$143.72$143.721,499,700
2013-01-16$142.82$142.821,139,900
2013-01-15$143.01$143.011,391,800
2013-01-14$143.88$143.881,164,400
2013-01-11$143.79$143.791,793,500
2013-01-10$143.91$143.912,119,600
2013-01-09$144.08$144.082,098,900
2013-01-08$144.39$144.391,760,100
2013-01-07$146.42$146.421,121,600
2013-01-04$145.93$145.931,533,100
2013-01-03$147.86$147.865,816,600
2013-01-02$150.00$150.001,581,000