Biogen

BIIB

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BIIB

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Major Shareholders Latest
Shareholder
BlackRock, Inc.	10.82%	15.97M	0.72%	+1.16M	03/31/2026
FMR LLC	10.44%	15.41M	2.60%	+3.85M	05/29/2026
PRIMECAP Management Company	10.00%	14.76M	0.06%	-390.00	03/31/2026
Vanguard Capital Management, LLC	6.46%	9.54M	--	+9.54M	03/31/2026
State Street Global Advisors, Inc.	4.86%	7.17M	0.02%	+8.90K	03/31/2026
Vanguard Portfolio Management, LLC	4.42%	6.53M	--	+6.53M	03/31/2026
Geode Capital Management, LLC	2.94%	4.34M	0.08%	+143.20K	03/31/2026
Wellington Management Group LLP	2.01%	2.96M	0.41%	-589.63K	03/31/2026
Norges Bank Investment Management	1.79%	2.64M	0.01%	+0	12/31/2025
Boston Partners Global Investors, Inc.	1.69%	2.49M	0.54%	+791.09K	06/30/2026
UBS Asset Management AG	1.29%	1.90M	0.10%	-132.14K	03/31/2026
AQR Capital Management, LLC	1.27%	1.87M	0.25%	+373.96K	03/31/2026
T. Rowe Price Group, Inc.	1.24%	1.83M	0.10%	-129.56K	03/31/2026
Invesco Capital Management LLC	0.98%	1.45M	0.04%	+62.22K	03/31/2026
Northern Trust Global Investments	0.98%	1.45M	<0.01%	+453.00	03/31/2026
Legal & General Investment Management Limited	0.91%	1.35M	0.08%	-109.77K	03/31/2026
Strategic Advisers LLC	0.84%	1.24M	<0.01%	+0	05/29/2026
Eaton Vance Management	0.83%	1.22M	0.02%	+30.58K	03/31/2026
JP Morgan Asset Management	0.81%	1.19M	0.03%	-32.20K	03/31/2026
Charles Schwab Investment Management, Inc.	0.78%	1.15M	<0.01%	+3.10K	06/30/2026

All Shareholders