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Stock Price

$250.69

Current · As of: Oct 25, 2026

BIIB Stock Price

Latest$250.69as ofOct 25, 2026

Latest$250.69as ofOct 25, 2026

BIIB Close Price · excl. div ($3.08 → $250.69 · CAGR +13.4%)

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BIIB stock price history

Daily history. Dates identify market observations.

Biogen Stock Price — Daily history
Date	Stock Price
Dec 26, 1997	6
Dec 19, 1997	5
Dec 12, 1997	6
Dec 5, 1997	6
Nov 28, 1997	6
Nov 21, 1997	7
Nov 14, 1997	6
Nov 7, 1997	6
Oct 31, 1997	6
Oct 24, 1997	6
Oct 17, 1997	6
Oct 10, 1997	7
Oct 3, 1997	7
Sep 26, 1997	6
Sep 19, 1997	6
Sep 12, 1997	6
Sep 5, 1997	5
Aug 29, 1997	5
Aug 22, 1997	5
Aug 15, 1997	4
Aug 8, 1997	4
Aug 1, 1997	5
Jul 25, 1997	4
Jul 18, 1997	5
Jul 11, 1997	4
Jul 3, 1997	4
Jun 27, 1997	4
Jun 20, 1997	4
Jun 13, 1997	4
Jun 6, 1997	4
May 30, 1997	4
May 23, 1997	4
May 16, 1997	4
May 9, 1997	4
May 2, 1997	3
Apr 25, 1997	3
Apr 18, 1997	3
Apr 11, 1997	4
Apr 4, 1997	4
Mar 27, 1997	4
Mar 21, 1997	4
Mar 14, 1997	5
Mar 7, 1997	4
Feb 28, 1997	4
Feb 21, 1997	4
Feb 14, 1997	4
Feb 7, 1997	4
Jan 31, 1997	4
Jan 24, 1997	4
Jan 17, 1997	4
Jan 10, 1997	3
Jan 3, 1997	4
Dec 27, 1996	4
Dec 20, 1996	4
Dec 13, 1996	4
Dec 6, 1996	4
Nov 29, 1996	4
Nov 22, 1996	4
Nov 15, 1996	3
Nov 8, 1996	3
Nov 1, 1996	4
Oct 25, 1996	4
Oct 18, 1996	4
Oct 11, 1996	4
Oct 4, 1996	4
Sep 27, 1996	4
Sep 20, 1996	4
Sep 13, 1996	4
Sep 6, 1996	4
Aug 30, 1996	4
Aug 23, 1996	4
Aug 16, 1996	3
Aug 9, 1996	3
Aug 2, 1996	3
Jul 26, 1996	3
Jul 19, 1996	3
Jul 12, 1996	3
Jul 5, 1996	3
Jun 28, 1996	4
Jun 21, 1996	4
Jun 14, 1996	4
Jun 7, 1996	4
May 31, 1996	4
May 24, 1996	5
May 17, 1996	5
May 10, 1996	5
May 3, 1996	5
Apr 26, 1996	5
Apr 19, 1996	4
Apr 12, 1996	4
Apr 4, 1996	5
Mar 29, 1996	4
Mar 22, 1996	3
Mar 15, 1996	4
Mar 8, 1996	3
Mar 1, 1996	3
Feb 23, 1996	3
Feb 16, 1996	4
Feb 9, 1996	4
Feb 2, 1996	4

Data is provided for informational purposes only and does not constitute investment advice. Past performance is not indicative of future results.