BIIB SEC filings last scanned 22 Aug 2026, 16:50 UTC
CEO Timeline
Christopher A. ViehbacherCurrent
Nov 2022 — Present(3y 10mo)
Christopher A. Viehbacher was appointed President and CEO of Biogen Inc., effective November 14, 2022, succeeding Michel Vounatsos.
1 source filing — click to expand
Michel Vounatsos
Jan 2017 — Nov 2022(5y 10mo)
Michel Vounatsos was appointed Chief Executive Officer of Biogen Inc., succeeding George A. Scangos, effective January 6, 2017.
announced departure in connection with appointment of new CEO
5 source filings — click to expand
George A. Scangos
Jul 2010 — Jan 2017(6y 6mo)
George A. Scangos was appointed Chief Executive Officer of Biogen Idec Inc., effective July 15, 2010.
stepped down
4 source filings — click to expand
James C. Mullen
Nov 2003 — Jun 2010(6y 7mo)
James C. Mullen became Chief Executive Officer and President of Biogen Idec Inc. upon the merger of Biogen, Inc. and Idec Pharmaceuticals Corporation in November 2003.