NASDAQ:BIIB | Shares Outstanding | BIOGEN INC.

Complete source-backed shares outstanding history.

Available history
2008-12-31 to 2026-04-27
Data captured

Historical Shares Outstanding

DateShares outstanding
2026-04-27147,637,117
2026-02-04146,758,528
2025-12-31146,800,000
2025-10-29146,702,272
2025-07-29146,614,598
2025-04-30146,527,832
2025-02-11146,374,937
2024-12-31145,800,000
2024-10-29145,719,340
2024-07-31145,661,642
2024-04-23145,596,895
2024-02-12145,360,798
2023-12-31144,900,000
2023-11-07144,898,112
2023-07-24144,823,335
2023-04-24144,742,305
2023-02-14144,485,646
2022-12-31144,000,000
2022-10-24144,001,404
2022-07-19145,113,047
2022-05-02146,452,013
2022-02-02146,962,793
2021-12-31147,000,000
2021-10-19146,892,712
2021-07-21149,033,443
2021-04-21150,554,750
2021-02-02152,335,731
2020-12-31152,400,000
2020-10-20153,881,597
2020-07-21158,313,471
2020-04-22163,187,486
2020-02-04174,064,011
2019-12-31174,200,000
2019-10-21180,441,878
2019-07-19184,447,218
2019-04-19193,893,397
2019-02-01196,708,784
2018-12-31197,200,000
2018-10-19201,482,595
2018-07-20201,442,850
2018-04-20211,007,945
2018-01-26211,562,686
2017-12-31211,500,000
2017-10-20211,476,936
2017-07-21211,431,746
2017-04-21212,115,203
2017-01-27215,951,945
2016-12-31215,900,000
2016-10-21217,574,479
2016-07-15219,120,762
2016-04-15219,051,491
2016-01-29218,672,717
2015-12-31218,600,000
2015-10-16222,903,109
2015-07-17235,169,225
2015-04-17235,229,512
2015-01-30234,614,474
2014-12-31234,600,000
2014-10-17236,155,407
2014-07-18236,144,705
2014-04-18237,199,825
2014-01-31236,393,930
2013-12-31236,332,000
2013-10-21236,212,930
2013-07-18237,671,593
2013-04-18237,374,815
2013-01-31236,312,191
2012-12-31236,582,000
2012-10-19236,596,922
2012-07-18236,346,955
2012-04-24239,562,899
2012-01-31238,725,065
2011-12-31242,115,000
2011-10-25242,917,349
2011-07-22242,545,771
2011-04-18241,632,189
2011-01-31240,911,883
2010-12-31240,538,000
2010-10-22238,302,269
2010-07-16241,915,236
2010-04-16266,998,007
2010-02-05269,601,262
2009-12-31274,855
2009-10-14289,198,517
2009-07-13288,855,922
2008-12-31288,046,000