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VANGUARD PORTFOLIO MANAGEMENT LLC

Position in BIIB — Biogen Inc.

CIK 2100121 MALVERN, PA

Position in BIIB

as of Jun 30, 2026 · filed Aug 13, 2026
Position Value
$1,427,062,472
+$229,600,962 QoQ
Shares Held
6,604,936
+1.1% QoQ
Ownership
4.47%
of shares outstanding
% of Portfolio
0.06%
of 13F equity value
Holder Rank
#6
of 1,036 holders
Holding Since
Mar 2026
2 quarters on record
Voting authority Sole 0% Shared 0% None 100%

Common Shares in BIIB Over Time

Shares Held

Position Value (USD)

Position in Drug Manufacturers - General

Healthcare · as of Jun 30, 2026

VANGUARD PORTFOLIO MANAGEMENT LLC holds $79,321,305,947 across 11 Drug Manufacturers - General names. BIIB ranks #9 (1.8% of the industry book) .

# Ticker Company Shares Value (USD) Open

All Filings in BIIB

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2 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $1,427,062,472 6,604,936
2026-03-31 $1,197,461,510 6,531,727