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 — 2007

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2007-12-31$56.92$56.922,327,100
2007-12-28$57.84$57.841,502,700
2007-12-27$58.33$58.332,234,100
2007-12-26$59.34$59.342,270,400
2007-12-24$58.41$58.412,316,300
2007-12-21$57.67$57.676,067,200
2007-12-20$56.96$56.964,230,600
2007-12-19$55.50$55.504,178,200
2007-12-18$55.99$55.996,696,300
2007-12-17$55.57$55.575,376,000
2007-12-14$58.79$58.799,207,600
2007-12-13$57.91$57.9131,051,700
2007-12-12$75.88$75.8812,966,600
2007-12-11$75.39$75.395,459,100
2007-12-10$73.97$73.971,735,700
2007-12-07$74.94$74.942,206,100
2007-12-06$73.93$73.932,966,600
2007-12-05$74.00$74.002,235,800
2007-12-04$72.55$72.552,552,300
2007-12-03$73.82$73.822,671,900
2007-11-30$74.12$74.123,856,700
2007-11-29$72.77$72.773,818,400
2007-11-28$70.28$70.282,775,900
2007-11-27$69.75$69.752,824,600
2007-11-26$68.00$68.002,504,200
2007-11-23$69.51$69.51650,100
2007-11-21$68.63$68.631,857,300
2007-11-20$70.21$70.213,811,300
2007-11-19$70.25$70.253,267,600
2007-11-16$70.04$70.044,080,200
2007-11-15$69.92$69.924,963,600
2007-11-14$70.01$70.015,629,600
2007-11-13$70.83$70.834,387,900
2007-11-12$69.88$69.886,058,100
2007-11-09$72.29$72.296,534,000
2007-11-08$74.99$74.998,641,200
2007-11-07$71.13$71.134,055,700
2007-11-06$73.44$73.442,746,100
2007-11-05$73.52$73.522,946,800
2007-11-02$73.98$73.983,014,300
2007-11-01$72.87$72.873,490,100
2007-10-31$74.44$74.443,353,600
2007-10-30$73.79$73.792,542,400
2007-10-29$74.82$74.824,580,500
2007-10-26$76.72$76.723,818,200
2007-10-25$76.30$76.304,516,300
2007-10-24$76.72$76.728,335,600
2007-10-23$78.93$78.936,370,800
2007-10-22$80.11$80.115,137,100
2007-10-19$80.22$80.226,668,800
2007-10-18$79.31$79.316,839,600
2007-10-17$79.26$79.267,877,100
2007-10-16$79.29$79.2912,162,700
2007-10-15$82.51$82.5130,694,100
2007-10-12$69.43$69.433,956,400
2007-10-11$67.12$67.123,202,800
2007-10-10$67.41$67.412,346,500
2007-10-09$67.24$67.241,657,400
2007-10-08$66.42$66.421,805,200
2007-10-05$67.63$67.632,549,800
2007-10-04$65.88$65.882,594,600
2007-10-03$65.35$65.352,509,300
2007-10-02$65.66$65.663,464,000
2007-10-01$67.94$67.942,977,100
2007-09-28$66.33$66.332,969,500
2007-09-27$66.45$66.453,815,100
2007-09-26$68.15$68.152,565,400
2007-09-25$68.00$68.002,242,300
2007-09-24$68.45$68.453,185,600
2007-09-21$67.39$67.393,746,000
2007-09-20$67.10$67.102,033,300
2007-09-19$67.46$67.464,375,700
2007-09-18$66.80$66.803,493,200
2007-09-17$64.50$64.503,518,300
2007-09-14$65.42$65.426,286,900
2007-09-13$65.40$65.404,994,800
2007-09-12$64.71$64.712,313,900
2007-09-11$65.50$65.502,572,500
2007-09-10$65.22$65.222,948,000
2007-09-07$65.78$65.784,913,000
2007-09-06$66.53$66.538,632,100
2007-09-05$62.87$62.874,200,700
2007-09-04$63.55$63.552,964,200
2007-08-31$63.82$63.823,100,600
2007-08-30$64.59$64.594,136,200
2007-08-29$62.86$62.863,179,900
2007-08-28$62.08$62.082,461,200
2007-08-27$62.93$62.934,280,300
2007-08-24$62.89$62.897,593,100
2007-08-23$59.97$59.975,399,700
2007-08-22$59.56$59.562,948,400
2007-08-21$59.60$59.602,391,400
2007-08-20$59.96$59.963,765,400
2007-08-17$60.20$60.204,537,900
2007-08-16$59.10$59.104,812,900
2007-08-15$58.46$58.463,638,700
2007-08-14$59.45$59.454,102,600
2007-08-13$58.83$58.834,738,500
2007-08-10$57.85$57.854,964,600
2007-08-09$58.13$58.134,339,000
2007-08-08$58.89$58.894,386,300
2007-08-07$58.28$58.284,304,600
2007-08-06$56.74$56.744,463,100
2007-08-03$56.65$56.657,748,800
2007-08-02$56.49$56.497,316,500
2007-08-01$55.63$55.638,226,200
2007-07-31$56.54$56.548,459,200
2007-07-30$55.43$55.437,388,200
2007-07-27$57.01$57.015,877,300
2007-07-26$58.19$58.198,330,100
2007-07-25$59.01$59.0110,262,200
2007-07-24$56.24$56.247,228,100
2007-07-23$54.75$54.754,418,600
2007-07-20$54.94$54.944,683,100
2007-07-19$55.02$55.025,124,500
2007-07-18$55.18$55.185,772,000
2007-07-17$54.76$54.765,653,500
2007-07-16$55.34$55.343,400,400
2007-07-13$55.92$55.922,258,200
2007-07-12$55.50$55.504,457,000
2007-07-11$54.85$54.852,682,100
2007-07-10$54.51$54.518,727,400
2007-07-09$54.78$54.783,411,600
2007-07-06$54.50$54.502,597,900
2007-07-05$54.45$54.453,287,600
2007-07-03$54.55$54.552,033,300
2007-07-02$53.81$53.814,294,600
2007-06-29$53.50$53.503,477,200
2007-06-28$53.55$53.555,364,400
2007-06-27$53.57$53.5718,426,200
2007-06-26$52.36$52.368,488,700
2007-06-25$51.75$51.7513,328,900
2007-06-22$51.58$51.585,059,700
2007-06-21$52.00$52.003,374,200
2007-06-20$51.37$51.373,711,300
2007-06-19$51.85$51.854,556,500
2007-06-18$51.63$51.634,578,200
2007-06-15$51.33$51.335,811,300
2007-06-14$51.21$51.212,992,100
2007-06-13$51.49$51.493,215,000
2007-06-12$51.07$51.073,584,200
2007-06-11$51.21$51.213,854,300
2007-06-08$51.53$51.534,122,600
2007-06-07$50.86$50.865,727,000
2007-06-06$51.92$51.924,695,900
2007-06-05$52.02$52.024,972,500
2007-06-04$52.25$52.254,519,200
2007-06-01$52.29$52.294,051,800
2007-05-31$52.22$52.225,966,900
2007-05-30$52.13$52.1315,871,900
2007-05-29$49.21$49.213,621,500
2007-05-25$49.47$49.475,737,200
2007-05-24$47.91$47.914,213,400
2007-05-23$48.13$48.136,188,800
2007-05-22$47.01$47.011,819,500
2007-05-21$46.90$46.902,166,300
2007-05-18$46.38$46.383,678,500
2007-05-17$46.45$46.452,109,400
2007-05-16$47.19$47.193,648,500
2007-05-15$46.40$46.402,870,900
2007-05-14$46.60$46.603,883,400
2007-05-11$46.64$46.642,675,700
2007-05-10$46.03$46.033,984,400
2007-05-09$47.25$47.252,806,600
2007-05-08$47.37$47.373,622,300
2007-05-07$47.42$47.422,745,900
2007-05-04$46.91$46.913,922,800
2007-05-03$47.28$47.284,377,000
2007-05-02$48.02$48.027,255,900
2007-05-01$48.00$48.005,775,700
2007-04-30$47.21$47.213,861,700
2007-04-27$47.99$47.994,216,300
2007-04-26$48.11$48.113,953,700
2007-04-25$48.00$48.003,655,600
2007-04-24$48.28$48.285,305,600
2007-04-23$48.86$48.869,817,600
2007-04-20$46.64$46.643,652,700
2007-04-19$45.86$45.863,463,000
2007-04-18$45.79$45.792,602,000
2007-04-17$45.62$45.623,140,200
2007-04-16$45.46$45.462,387,700
2007-04-13$45.57$45.572,954,800
2007-04-12$45.07$45.073,520,800
2007-04-11$43.68$43.682,467,500
2007-04-10$44.42$44.422,301,500
2007-04-09$44.39$44.392,315,600
2007-04-05$45.02$45.021,983,600
2007-04-04$44.91$44.911,917,600
2007-04-03$44.81$44.812,549,600
2007-04-02$44.31$44.312,635,100
2007-03-30$44.38$44.382,922,200
2007-03-29$44.28$44.283,609,000
2007-03-28$44.84$44.842,046,400
2007-03-27$45.14$45.141,556,700
2007-03-26$45.64$45.642,282,200
2007-03-23$45.90$45.902,546,500
2007-03-22$45.53$45.532,752,700
2007-03-21$45.81$45.813,301,900
2007-03-20$44.71$44.712,598,700
2007-03-19$44.40$44.403,110,200
2007-03-16$43.55$43.554,386,900
2007-03-15$44.10$44.103,586,100
2007-03-14$44.11$44.114,712,700
2007-03-13$43.16$43.164,306,700
2007-03-12$44.09$44.092,390,000
2007-03-09$43.30$43.302,910,000
2007-03-08$43.13$43.133,787,200
2007-03-07$43.78$43.783,808,800
2007-03-06$44.18$44.184,578,700
2007-03-05$43.41$43.413,803,800
2007-03-02$43.66$43.664,058,100
2007-03-01$44.57$44.575,295,300
2007-02-28$45.19$45.194,535,000
2007-02-27$45.88$45.885,027,100
2007-02-26$47.17$47.172,518,000
2007-02-23$46.90$46.901,835,700
2007-02-22$47.18$47.183,247,800
2007-02-21$47.02$47.024,409,300
2007-02-20$47.20$47.204,040,900
2007-02-16$48.25$48.254,051,300
2007-02-15$48.00$48.008,861,500
2007-02-14$50.49$50.493,603,900
2007-02-13$49.17$49.172,737,300
2007-02-12$49.31$49.313,229,100
2007-02-09$49.50$49.502,031,800
2007-02-08$49.64$49.641,993,700
2007-02-07$49.32$49.322,026,900
2007-02-06$48.94$48.943,008,600
2007-02-05$49.03$49.032,073,200
2007-02-02$49.30$49.302,725,200
2007-02-01$49.39$49.394,495,600
2007-01-31$48.34$48.342,184,800
2007-01-30$48.05$48.052,927,700
2007-01-29$47.68$47.682,753,400
2007-01-26$47.52$47.522,816,400
2007-01-25$47.79$47.794,167,600
2007-01-24$48.79$48.793,545,200
2007-01-23$49.13$49.134,706,700
2007-01-22$50.18$50.183,699,500
2007-01-19$51.84$51.842,367,200
2007-01-18$51.52$51.522,043,900
2007-01-17$51.90$51.903,963,000
2007-01-16$51.80$51.802,710,000
2007-01-12$50.97$50.973,147,800
2007-01-11$50.44$50.442,847,900
2007-01-10$49.28$49.283,161,600
2007-01-09$49.50$49.502,816,500
2007-01-08$50.02$50.023,160,200
2007-01-05$49.76$49.762,230,400
2007-01-04$49.75$49.752,884,300
2007-01-03$49.33$49.333,833,500