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FRED ALGER MANAGEMENT, LLC

Position in BIIB — Biogen Inc.

CIK 3520 NEW YORK, NY

Position in BIIB

as of Jun 30, 2026 · filed Aug 14, 2026
Position Value
$170,321,610
+$35,905,154 QoQ
Shares Held
788,307
+7.5% QoQ
Ownership
0.534%
of shares outstanding
% of Portfolio
0.57%
of 13F equity value
Holder Rank
#30
of 1,031 holders
Holding Since
Mar 2020
16 quarters on record
Voting authority Sole 96% Shared 0% None 4%

Common Shares in BIIB Over Time

Shares Held

Position Value (USD)

Position in Drug Manufacturers - General

Healthcare · as of Jun 30, 2026

FRED ALGER MANAGEMENT, LLC holds $736,177,545 across 12 Drug Manufacturers - General names. BIIB ranks #2 (23.1% of the industry book) .

# Ticker Company Shares Value (USD) Open
2 BIIB
Biogen Inc.
This page
788,307 $170,321,610

All Filings in BIIB

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16 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $170,321,610 788,307
2026-03-31 $134,416,456 733,194
2025-12-31 $140,576,236 798,774
2025-09-30 $285,623 2,039
2025-03-31 $1,663,837 12,159
2023-12-31 $3,424,820 13,235
2023-06-30 $35,885,403 125,980
2023-03-31 $74,911,847 269,438
2022-12-31 $91,955,439 332,065
2022-09-30 $38,456,544 144,032
2021-06-30 $29,645,213 85,613
2021-03-31 $4,958,568 17,725
2020-12-31 $969,400 3,959
2020-09-30 $4,822 17
2020-06-30 $1,034,615 3,867
2020-03-31 $51,598,414 163,090