Michael R Mcdonnell Biogen Inc. (BIIB) insider trading activity

Michael R Mcdonnell is EVP, Chief Financial Officer of BIOGEN INC.. Currently has a direct ownership of 22,455 shares of BIIB, which is worth approximately $3.2 Million. The most recent transaction as insider was on Feb 07, 2025, when has been sold 1,502 shares (Common Stock) at a price of $141.35 per share, resulting in proceeds of $212,307. This information was disclosed in a Form 4 filing with the Securities and Exchange Commission (SEC).

Shares Held (Direct Ownership) 22.5K

15.71% 3M change

39.26% 12M change

Total Value Held $3.2 Million

MICHAEL R MCDONNELL Transaction History

Date	Transaction	Value	Shares Traded	Shares Held
Feb 07 2025	SELL Payment of exercise price or tax liability	$212,307 $141.35 p/Share	1,502 Reduced 6.27%	22,455 Common Stock
Feb 07 2025	BUY Exercise of conversion of derivative security	-	4,551 Added 16.42%	23,171 Common Stock
Feb 16 2024	SELL Payment of exercise price or tax liability	$753,197 $219.08 p/Share	3,438 Reduced 15.05%	19,406 Common Stock
Feb 16 2024	BUY Exercise of conversion of derivative security	-	6,720 Added 24.68%	20,507 Common Stock
Feb 09 2024	SELL Payment of exercise price or tax liability	$344,842 $240.98 p/Share	1,431 Reduced 8.15%	16,124 Common Stock
Feb 09 2024	BUY Exercise of conversion of derivative security	-	3,257 Added 15.65%	17,555 Common Stock
Feb 08 2024	SELL Payment of exercise price or tax liability	$183,829 $240.3 p/Share	765 Reduced 5.08%	14,298 Common Stock
Feb 08 2024	BUY Exercise of conversion of derivative security	-	2,335 Added 13.42%	15,063 Common Stock
Sep 01 2023	SELL Payment of exercise price or tax liability	$722,427 $267.17 p/Share	2,704 Reduced 17.52%	12,728 Common Stock
Sep 01 2023	BUY Exercise of conversion of derivative security	-	5,285 Added 27.32%	14,060 Common Stock
Feb 17 2023	SELL Payment of exercise price or tax liability	$364,677 $278.38 p/Share	1,310 Reduced 14.73%	7,586 Common Stock
Feb 17 2023	BUY Exercise of conversion of derivative security	-	2,561 Added 20.15%	10,147 Common Stock
Feb 10 2023	SELL Payment of exercise price or tax liability	$316,361 $286.3 p/Share	1,105 Reduced 11.05%	8,896 Common Stock
Feb 10 2023	BUY Exercise of conversion of derivative security	-	3,256 Added 24.56%	10,001 Common Stock
Sep 01 2022	SELL Payment of exercise price or tax liability	$485,090 $199.79 p/Share	2,428 Reduced 26.47%	6,745 Common Stock
Sep 01 2022	BUY Exercise of conversion of derivative security	-	4,746 Added 37.83%	7,801 Common Stock
Feb 18 2022	SELL Payment of exercise price or tax liability	$204,965 $209.79 p/Share	977 Reduced 18.08%	4,427 Common Stock
Feb 18 2022	BUY Exercise of conversion of derivative security	-	1,981 Added 26.82%	5,404 Common Stock
Sep 01 2021	SELL Payment of exercise price or tax liability	$873,336 $338.24 p/Share	2,582 Reduced 43.0%	3,423 Common Stock
Sep 01 2021	BUY Exercise of conversion of derivative security	$2,031,131 $338.24 p/Share	6,005 Added 55.25%	4,864 Common Stock

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