Question 1

Who owns BIIB?

Accepted Answer

BIOGEN INC (BIIB) is held by 298 institutional investors that disclose positions via SEC 13F filings. The largest disclosed holder is FMR LLC as of Q2 2026.

Question 2

Are institutions buying or selling BIIB?

Accepted Answer

In Q2 2026, 177 institutions opened or increased positions in BIOGEN INC while 121 reduced or exited: a net buying quarter.

Question 3

What is the Smart Money Verdict on BIIB?

Accepted Answer

HoldingsIntel scores BIOGEN INC across four independent sources (institutional 13F activity, insider trades, activist filings, and congressional trades), with 4 of the 4 carrying data for BIIB. In Q2 2026, the institutional leg showed net inflows: 177 buying versus 121 selling.

Question 4

How many hedge funds hold BIIB?

Accepted Answer

298 institutional investors report holding BIOGEN INC (BIIB) as of Q2 2026, based on SEC 13F filings.

Question 5

Is institutional money flowing into BIIB?

Accepted Answer

As of Q2 2026, tracked institutions in BIOGEN INC show 177 buyers versus 121 sellers: net inflows.

Question 6

Are Congress members and hedge funds both buying BIIB?

Accepted Answer

Yes. In Q2 2026, 2 members of Congress and 177 institutional investors bought BIOGEN INC. HoldingsIntel cross-checks STOCK Act disclosures against 13F filings to surface these overlaps.

	Action
FMR LLC	Increased	18.2M(+42.2%)	$3.9B	0.2%	+23.41%	51
BlackRock, Inc.	Increased	16M(+0.1%)	$3.5B	0.1%	+23.30%	32
PRIMECAP MANAGEMENT CO/CA/	Increased	15.2M(+2.7%)	$3.3B	1.9%	-21.30%	52
VAVANGUARD CAPITAL MANAGEMENT LLC	Increased	9.7M(+1.2%)	$2.1B	0.0%	+26.64%	32
STATE STREET CORP	Increased	7.3M(+2.5%)	$1.6B	0.0%	+0.32%	33
VPVANGUARD PORTFOLIO MANAGEMENT LLC	Increased	6.6M(+1.1%)	$1.4B	0.1%	+26.65%	32
GEODE CAPITAL MANAGEMENT, LLC	Increased	4.4M(+2.5%)	$957.9M	0.1%	-7.52%	33
WELLINGTON MANAGEMENT GROUP LLP	Increased	3.1M(+5.3%)	$673.6M	0.1%	-5.00%	40
MORGAN STANLEY	Increased	2.4M(+11.1%)	$521M	0.0%	+12.50%	35
AQR CAPITAL MANAGEMENT LLC	Increased	1.9M(+0.7%)	$416.9M	0.1%	+52.37%	37
JPMORGAN CHASE & CO	Decreased	1.8M(-9.6%)	$394.9M	0.0%	+28.74%	0
Invesco Ltd.	Increased	1.8M(+3.4%)	$389.8M	0.0%	+11.74%	32
Amundi	Increased	1.5M(+91.8%)	$327.7M	0.1%	+8.99%	49
Legal & General Group Plc	Increased	1.5M(+10.6%)	$322.6M	0.1%	-7.08%	34
NORTHERN TRUST CORP	Decreased	1.4M(-1.2%)	$308.9M	0.0%	+4.13%	0
Boston Partners	Decreased	1.3M(-25.7%)	$272.8M	0.2%	+32.20%	0
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	Decreased	1.3M(-8.9%)	$271.2M	0.0%	+1.31%	0
GOLDMAN SACHS GROUP INC	Increased	1.2M(+17.1%)	$265.8M	0.0%	+19.81%	36
DIMENSIONAL FUND ADVISORS LP	Increased	1.1M(+6.4%)	$248.2M	0.0%	-3.87%	33
Pacer Advisors, Inc.	Increased	1.1M(+70.0%)	$242.6M	0.6%	+30.23%	64

BIOGEN INC

Smart Money Verdict

Who's Trading

Continue exploring

Other Healthcare stocks held by institutions

BIOGEN INC

Smart Money Verdict

Who's Trading

Top Holders

Continue exploring

Other Healthcare stocks held by institutions