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.

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Historical Stock Price — 2016

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2016-12-30$283.58$283.581,327,200
2016-12-29$287.03$287.031,120,900
2016-12-28$289.25$289.251,036,200
2016-12-27$291.12$291.121,453,100
2016-12-23$287.53$287.531,118,100
2016-12-22$283.07$283.071,061,800
2016-12-21$283.11$283.111,377,800
2016-12-20$285.59$285.592,219,600
2016-12-19$278.77$278.772,553,500
2016-12-16$286.40$286.402,273,200
2016-12-15$286.97$286.971,706,500
2016-12-14$286.25$286.251,299,300
2016-12-13$287.38$287.381,596,200
2016-12-12$286.49$286.491,776,200
2016-12-09$287.77$287.776,257,700
2016-12-08$289.54$289.544,771,300
2016-12-07$285.30$285.301,967,400
2016-12-06$291.16$291.161,572,600
2016-12-05$290.22$290.221,870,700
2016-12-02$297.19$297.191,429,400
2016-12-01$295.78$295.781,684,800
2016-11-30$294.07$294.072,164,900
2016-11-29$302.77$302.771,389,500
2016-11-28$303.78$303.781,247,900
2016-11-25$305.20$305.20740,900
2016-11-23$305.93$305.935,377,500
2016-11-22$318.11$318.111,522,200
2016-11-21$318.32$318.321,331,100
2016-11-18$317.00$317.001,298,400
2016-11-17$319.30$319.301,459,500
2016-11-16$317.65$317.651,218,100
2016-11-15$322.58$322.581,685,100
2016-11-14$321.49$321.491,567,900
2016-11-11$319.18$319.181,619,500
2016-11-10$324.40$324.402,665,700
2016-11-09$319.86$319.864,271,700
2016-11-08$295.60$295.601,031,000
2016-11-07$295.62$295.622,190,000
2016-11-04$277.00$277.001,307,600
2016-11-03$273.49$273.491,407,900
2016-11-02$277.26$277.261,081,900
2016-11-01$282.56$282.561,371,500
2016-10-31$280.18$280.181,448,900
2016-10-28$283.64$283.641,884,500
2016-10-27$290.89$290.891,554,300
2016-10-26$296.46$296.462,660,100
2016-10-25$286.00$286.001,838,300
2016-10-24$290.78$290.781,088,200
2016-10-21$290.65$290.651,567,500
2016-10-20$299.66$299.661,323,700
2016-10-19$295.14$295.14988,200
2016-10-18$295.05$295.051,153,100
2016-10-17$291.67$291.671,209,700
2016-10-14$290.50$290.501,149,800
2016-10-13$294.41$294.411,571,600
2016-10-12$291.88$291.881,823,700
2016-10-11$298.30$298.301,494,600
2016-10-10$304.59$304.59987,200
2016-10-07$305.59$305.591,526,000
2016-10-06$305.99$305.99865,100
2016-10-05$309.70$309.70977,300
2016-10-04$311.48$311.48914,000
2016-10-03$311.59$311.591,001,200
2016-09-30$313.03$313.032,124,800
2016-09-29$305.78$305.781,133,900
2016-09-28$310.55$310.551,020,100
2016-09-27$314.53$314.531,104,500
2016-09-26$309.82$309.82924,200
2016-09-23$312.58$312.58881,600
2016-09-22$314.81$314.811,378,000
2016-09-21$312.00$312.001,527,600
2016-09-20$307.05$307.051,100,100
2016-09-19$303.50$303.501,108,300
2016-09-16$304.51$304.511,874,500
2016-09-15$302.82$302.821,271,400
2016-09-14$299.79$299.791,534,200
2016-09-13$297.41$297.411,829,300
2016-09-12$302.66$302.661,811,000
2016-09-09$296.10$296.101,976,200
2016-09-08$307.73$307.731,482,300
2016-09-07$312.30$312.301,155,600
2016-09-06$310.67$310.671,705,400
2016-09-02$313.59$313.592,233,900
2016-09-01$306.03$306.031,068,000
2016-08-31$305.63$305.631,045,000
2016-08-30$307.86$307.861,071,000
2016-08-29$306.13$306.131,045,000
2016-08-26$308.17$308.171,124,200
2016-08-25$306.85$306.851,669,800
2016-08-24$309.33$309.331,646,500
2016-08-23$318.17$318.171,429,000
2016-08-22$316.81$316.811,317,300
2016-08-19$316.81$316.811,393,500
2016-08-18$313.38$313.38879,000
2016-08-17$313.82$313.82852,600
2016-08-16$313.42$313.42946,100
2016-08-15$313.39$313.39929,800
2016-08-12$313.94$313.94993,800
2016-08-11$314.49$314.491,771,100
2016-08-10$308.87$308.871,236,300
2016-08-09$314.42$314.421,132,200
2016-08-08$313.65$313.652,136,800
2016-08-05$315.96$315.961,358,300
2016-08-04$314.56$314.562,002,300
2016-08-03$321.34$321.346,040,500
2016-08-02$330.11$330.117,800,000
2016-08-01$301.83$301.833,565,600
2016-07-29$289.93$289.931,338,500
2016-07-28$289.03$289.031,454,500
2016-07-27$288.35$288.351,458,200
2016-07-26$287.04$287.041,987,100
2016-07-25$287.35$287.351,977,700
2016-07-22$287.78$287.783,394,600
2016-07-21$282.45$282.455,548,000
2016-07-20$262.41$262.411,830,200
2016-07-19$259.82$259.821,094,500
2016-07-18$261.50$261.502,133,000
2016-07-15$260.30$260.302,404,900
2016-07-14$252.87$252.871,295,400
2016-07-13$251.19$251.191,285,400
2016-07-12$253.36$253.361,175,100
2016-07-11$252.54$252.541,746,600
2016-07-08$251.30$251.301,295,600
2016-07-07$247.27$247.271,140,400
2016-07-06$247.48$247.481,750,900
2016-07-05$242.03$242.031,239,300
2016-07-01$245.06$245.061,465,500
2016-06-30$241.82$241.822,093,200
2016-06-29$238.91$238.912,881,200
2016-06-28$228.52$228.522,115,700
2016-06-27$224.60$224.602,913,900
2016-06-24$229.02$229.022,685,000
2016-06-23$238.62$238.621,403,000
2016-06-22$234.60$234.602,622,400
2016-06-21$233.00$233.001,955,900
2016-06-20$237.39$237.391,401,100
2016-06-17$238.21$238.212,219,500
2016-06-16$242.19$242.191,995,500
2016-06-15$238.91$238.912,101,600
2016-06-14$241.70$241.701,696,700
2016-06-13$244.35$244.351,622,700
2016-06-10$246.13$246.132,455,300
2016-06-09$250.46$250.462,860,200
2016-06-08$254.17$254.173,610,400
2016-06-07$252.86$252.868,876,400
2016-06-06$289.84$289.841,618,700
2016-06-03$290.23$290.231,473,000
2016-06-02$289.73$289.731,128,200
2016-06-01$286.82$286.821,418,400
2016-05-31$289.73$289.732,146,500
2016-05-27$282.79$282.791,262,400
2016-05-26$282.00$282.001,829,400
2016-05-25$279.70$279.701,796,300
2016-05-24$272.94$272.941,560,900
2016-05-23$264.85$264.85848,500
2016-05-20$263.66$263.661,340,400
2016-05-19$258.72$258.721,281,200
2016-05-18$264.29$264.291,040,800
2016-05-17$263.52$263.521,161,000
2016-05-16$266.26$266.261,306,100
2016-05-13$262.03$262.03997,700
2016-05-12$262.71$262.711,299,300
2016-05-11$267.25$267.25971,500
2016-05-10$273.27$273.271,031,800
2016-05-09$270.17$270.171,425,800
2016-05-06$263.61$263.611,202,000
2016-05-05$264.62$264.621,105,900
2016-05-04$263.12$263.121,788,200
2016-05-03$273.71$273.711,603,600
2016-05-02$273.69$273.691,359,300
2016-04-29$274.99$274.991,941,000
2016-04-28$281.08$281.081,403,300
2016-04-27$280.06$280.061,099,100
2016-04-26$281.70$281.701,473,700
2016-04-25$284.85$284.851,663,600
2016-04-22$282.70$282.702,355,100
2016-04-21$279.60$279.603,153,600
2016-04-20$265.89$265.892,522,500
2016-04-19$271.00$271.001,397,400
2016-04-18$272.92$272.921,541,300
2016-04-15$268.50$268.501,685,200
2016-04-14$270.56$270.56910,100
2016-04-13$271.73$271.731,395,000
2016-04-12$267.61$267.611,459,100
2016-04-11$265.19$265.191,888,500
2016-04-08$270.83$270.832,136,000
2016-04-07$273.04$273.042,006,100
2016-04-06$279.57$279.573,018,800
2016-04-05$265.62$265.621,700,700
2016-04-04$264.01$264.012,414,500
2016-04-01$260.54$260.542,156,200
2016-03-31$260.32$260.321,550,300
2016-03-30$254.18$254.181,161,600
2016-03-29$254.68$254.681,276,600
2016-03-28$251.76$251.761,019,000
2016-03-24$254.69$254.691,077,100
2016-03-23$255.24$255.241,545,600
2016-03-22$259.42$259.421,564,600
2016-03-21$256.05$256.051,451,300
2016-03-18$250.78$250.783,347,900
2016-03-17$246.31$246.311,895,000
2016-03-16$250.84$250.841,744,800
2016-03-15$250.33$250.331,954,800
2016-03-14$257.77$257.771,241,700
2016-03-11$259.74$259.741,759,900
2016-03-10$251.97$251.971,962,100
2016-03-09$255.66$255.661,892,500
2016-03-08$261.28$261.281,552,100
2016-03-07$269.52$269.521,678,700
2016-03-04$263.94$263.941,640,800
2016-03-03$268.64$268.641,430,900
2016-03-02$273.66$273.661,664,000
2016-03-01$270.90$270.901,928,400
2016-02-29$259.42$259.421,790,100
2016-02-26$264.49$264.491,603,200
2016-02-25$262.35$262.351,520,200
2016-02-24$257.22$257.221,433,700
2016-02-23$258.99$258.991,539,200
2016-02-22$265.83$265.831,218,100
2016-02-19$261.40$261.401,450,100
2016-02-18$259.05$259.051,536,200
2016-02-17$265.63$265.631,921,400
2016-02-16$256.52$256.522,084,200
2016-02-12$247.22$247.222,119,500
2016-02-11$245.11$245.112,171,200
2016-02-10$252.20$252.201,763,500
2016-02-09$249.99$249.992,386,900
2016-02-08$250.77$250.772,758,200
2016-02-05$263.86$263.862,856,900
2016-02-04$273.27$273.272,073,400
2016-02-03$270.43$270.432,085,800
2016-02-02$266.06$266.061,929,800
2016-02-01$273.45$273.451,852,000
2016-01-29$273.06$273.063,080,400
2016-01-28$265.96$265.963,056,500
2016-01-27$273.26$273.265,159,600
2016-01-26$259.87$259.872,108,200
2016-01-25$262.10$262.101,792,400
2016-01-22$268.92$268.922,111,800
2016-01-21$262.08$262.082,531,000
2016-01-20$269.35$269.352,368,300
2016-01-19$269.85$269.852,209,600
2016-01-15$273.33$273.332,579,900
2016-01-14$280.57$280.572,414,300
2016-01-13$267.25$267.252,108,400
2016-01-12$278.67$278.671,833,900
2016-01-11$278.54$278.542,109,600
2016-01-08$280.59$280.591,808,900
2016-01-07$284.01$284.011,844,900
2016-01-06$293.68$293.681,540,200
2016-01-05$296.70$296.701,263,900
2016-01-04$294.62$294.622,451,100