Alexander Susan H

Date	Company	Security	Transaction	Code	Indirect	10b5-1	$Price	#Shares	$Value	#Remaining
5 Nov 24	BIIB Biogen	Common Stock	Gift	Acquire G	Yes	No	0	20,082	0.00	20,082
5 Nov 24	BIIB Biogen	Common Stock	Gift	Dispose G	No	No	0	20,082	0.00	31,601
16 Feb 24	BIIB Biogen	Common Stock	Payment of exercise	Dispose F	No	No	219.08	781	171.10 k	51,683
16 Feb 24	BIIB Biogen	Common Stock	Option exercise	Acquire M	No	No	0	1,614	0.00	52,464
16 Feb 24	BIIB Biogen	Common Stock	Payment of exercise	Dispose F	No	No	219.08	1,656	362.80 k	50,850
16 Feb 24	BIIB Biogen	Common Stock	Option exercise	Acquire M	No	No	0	3,423	0.00	52,506
16 Feb 24	BIIB Biogen	RSU Common Stock	Other	Dispose J	No	No	0	2,012	0.00	0
16 Feb 24	BIIB Biogen	RSU Common Stock	Option exercise	Dispose M	No	No	0	1,614	0.00	2,012
16 Feb 24	BIIB Biogen	Performance Stock Unit Common Stock	Option exercise	Dispose M	No	No	0	3,423	0.00	0
9 Feb 24	BIIB Biogen	Common Stock	Payment of exercise	Dispose F	No	No	240.98	938	226.04 k	49,083

Data from 3, 4 and 5 filings. Values as filed, not updated for current price.