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BIOGEN INC.

ARTICLES AND BYLAWS

EX-3.1
d840763dex31.htm
2024-06-25
EX-3.2
d850833dex32.htm
2023-12-12
EX-3.1
d850833dex31.htm
2023-12-12
EX-3.1
d454539dex31.htm
2023-07-31
EX-3.1
d500907dex31.htm
2023-04-18
EX-3.1
d362642dex31.htm
2012-07-24
EX-3.2
d362642dex32.htm
2012-07-24
EX-3.2
d365484dex32.htm
2012-06-13
EX-3.1
d365484dex31.htm
2012-06-13
EX-3.1
a2113527zex-3_1.htm
2003-07-16
EX-3.2
a2113527zex-3_2.htm
2003-07-16
EX-3.1
b72570biexv3w1.htm
2008-10-21
EX-3.1
b72581biexv3w1.htm
2008-10-17
EX-3.1
b57116biexv3w1.htm
2005-10-03
EX-3.1
b86593exv3w1.htm
2011-07-26
EX-3.2
b86593exv3w2.htm
2011-07-26
EX-3.1
b82215exv3w1.htm
2010-10-26
EX-3.1
b82883exv3w1.htm
2010-10-08
EX-3.1
b73482biexv3w1.htm
2009-07-17
EX-3.4
a2081490zex-3_4.htm
2002-06-04