BIOGEN INC (BIIB) is held by institutional investors who disclose positions via SEC 13F filings. View the full list of institutional holders on HoldingsIntel.

Are institutions buying or selling BIIB?

HoldingsIntel tracks quarter-over-quarter changes in institutional positions for BIOGEN INC, showing new buyers, position increases, decreases, and exits with conviction-weighted sentiment.

What is the Smart Money Verdict on BIIB?

The Smart Money Verdict combines four independent signals (institutional 13F activity, insider trades, activist filings, and congressional trades) into a single assessment for BIOGEN INC.

Is institutional money flowing into BIIB?

282 institutional investors hold BIOGEN INC (BIIB). View detailed buyer/seller breakdown on HoldingsIntel.

What do hedge funds think about BIIB?

Track institutional sentiment and conviction scores for BIOGEN INC (BIIB) including Smart Money Verdict and position changes on HoldingsIntel.

BIOGEN INC

BIIB·09062X103·US·equity·Healthcare - Drug Manufacturers - General-13D/G

282

Holders

Avg rating(26 Elite)

$19.2B

Total Value

49% (309)

Fund Consensus

146 buying - 155 selling

Smart Money Verdict

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52Mixed MomentumSplit Signals

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See how BIIB's score breaks down across 4 SEC sources

Held by 282 funds

26 elite

Who's Trading

Activist

FMR LLC8.7%

13F: Mar 31, 2026Insider & Congress: Updated regularly

ActivistVAVanguard Capital Management7.5%Apr 29, 2026

Congress

Rohit KhannaBuy $50,001 - $100,000Apr 13, 2026

Congress

Rohit KhannaBuy $1,001 - $15,000Feb 6, 2026

Congress

Gilbert CisnerosBuy $1,001 - $15,000Jan 30, 2026

InsiderSPSinghal PriyaSell $69KSep 2, 2025

InsiderIRIzzar RachidSell $300KJul 8, 2025

Congress

Rob BresnahanBuy $1,001 - $15,000May 15, 2025

Fund	Action	Shares	Value	Weight	Est. P&L	Conviction
BlackRock, Inc.	Increased	16M(+7.8%)	$2.9B	0.1%	+27.07%	34
PRIMECAP MANAGEMENT CO/CA/	Decreased	14.8M	$2.7B	2.1%	-33.82%	0
FMR LLC	Increased	12.8M(+35.9%)	$2.3B	0.1%	+10.35%	50
STATE STREET CORP	Increased	7.2M(+0.1%)	$1.3B	0.0%	-23.81%	32
GEODE CAPITAL MANAGEMENT, LLC	Increased	4.3M(+3.4%)	$793.4M	0.0%	-22.55%	33
WELLINGTON MANAGEMENT GROUP LLP	Decreased	3M(-16.6%)	$543M	0.1%	-29.18%	0
MORGAN STANLEY	Decreased	2.2M(-6.6%)	$398M	0.0%	-6.26%	0
JPMORGAN CHASE & CO	Increased	2M(+8.6%)	$378.1M	0.0%	+21.37%	34
AQR CAPITAL MANAGEMENT LLC	Increased	1.9M(+25.8%)	$346.2M	0.2%	+26.88%	46
Invesco Ltd.	Increased	1.7M(+5.4%)	$320M	0.0%	-7.77%	33
Boston Partners	Decreased	1.7M(-1.2%)	$311.7M	0.3%	+9.38%	0
NORTHERN TRUST CORP	Increased	1.4M(+0.0%)	$265.2M	0.0%	-13.52%	31
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	Decreased	1.4M(-1.0%)	$252.5M	0.1%	-14.69%	0
Legal & General Group Plc	Decreased	1.3M(-7.5%)	$247.5M	0.1%	-20.91%	0
BANK OF AMERICA CORP /DE/	Increased	1.2M(+2.4%)	$212M	0.0%	+37.69%	31
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	Increased	1.1M(+0.5%)	$210.7M	0.0%	-23.40%	31
DIMENSIONAL FUND ADVISORS LP	Increased	1.1M(+12.3%)	$197.9M	0.0%	-24.66%	34
$DEUTSCHE BANK AG\$ DEUTSCHE BANK AG\	Increased	1.1M(+11.5%)	$195M	0.1%	-1.03%	34
GOLDMAN SACHS GROUP INC	Decreased	1.1M(-4.4%)	$192.7M	0.0%	+32.68%	0
Pictet Asset Management Holding SA	Decreased	913,328(-3.6%)	$168.3M	0.2%	+11.76%	0

BIOGEN INC

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