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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
Sep 26, 2003	34
Sep 19, 2003	38
Sep 12, 2003	36
Sep 5, 2003	34
Aug 29, 2003	35
Aug 22, 2003	33
Aug 15, 2003	33
Aug 8, 2003	32
Aug 1, 2003	33
Jul 25, 2003	35
Jul 18, 2003	35
Jul 11, 2003	38
Jul 3, 2003	36
Jun 27, 2003	35
Jun 20, 2003	39
Jun 13, 2003	40
Jun 6, 2003	40
May 30, 2003	38
May 23, 2003	38
May 16, 2003	34
May 9, 2003	33
May 2, 2003	34
Apr 25, 2003	32
Apr 17, 2003	32
Apr 11, 2003	32
Apr 4, 2003	37
Mar 28, 2003	35
Mar 21, 2003	34
Mar 14, 2003	30
Mar 7, 2003	29
Feb 28, 2003	29
Feb 21, 2003	30
Feb 14, 2003	30
Feb 7, 2003	31
Jan 31, 2003	32
Jan 24, 2003	32
Jan 17, 2003	35
Jan 10, 2003	34
Jan 3, 2003	34
Dec 27, 2002	34
Dec 20, 2002	34
Dec 13, 2002	33
Dec 6, 2002	33
Nov 29, 2002	33
Nov 22, 2002	39
Nov 15, 2002	40
Nov 8, 2002	42
Nov 1, 2002	47
Oct 25, 2002	44
Oct 18, 2002	43
Oct 11, 2002	39
Oct 4, 2002	36
Sep 27, 2002	42
Sep 20, 2002	40
Sep 13, 2002	44
Sep 6, 2002	41
Aug 30, 2002	40
Aug 23, 2002	43
Aug 16, 2002	45
Aug 9, 2002	46
Aug 2, 2002	42
Jul 26, 2002	40
Jul 19, 2002	39
Jul 12, 2002	36
Jul 5, 2002	35
Jun 28, 2002	35
Jun 21, 2002	33
Jun 14, 2002	35
Jun 7, 2002	38
May 31, 2002	43
May 24, 2002	44
May 17, 2002	48
May 10, 2002	46
May 3, 2002	51
Apr 26, 2002	55
Apr 19, 2002	63
Apr 12, 2002	60
Apr 5, 2002	60
Mar 28, 2002	64
Mar 22, 2002	69
Mar 15, 2002	70
Mar 8, 2002	68
Mar 1, 2002	65
Feb 22, 2002	62
Feb 15, 2002	59
Feb 8, 2002	57
Feb 1, 2002	59
Jan 25, 2002	63
Jan 18, 2002	61
Jan 11, 2002	66
Jan 4, 2002	65
Dec 28, 2001	72
Dec 21, 2001	68
Dec 14, 2001	68
Dec 7, 2001	69
Nov 30, 2001	70
Nov 23, 2001	67
Nov 16, 2001	68
Nov 9, 2001	63
Nov 2, 2001	61

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