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RENAISSANCE TECHNOLOGIES LLC

Position in BIIB — Biogen Inc.

CIK 1037389 NEW YORK, NY

Position in BIIB

as of Jun 30, 2026 · filed Aug 13, 2026
Position Value
$16,797,368
-$20,491,220 QoQ
Shares Held
77,744
-61.8% QoQ
Ownership
0.053%
of shares outstanding
% of Portfolio
0.02%
of 13F equity value
Holder Rank
#133
of 1,036 holders
Holding Since
Mar 2020
26 quarters on record
Voting authority Sole 100% Shared 0% None 0%

Common Shares in BIIB Over Time

Shares Held

Position Value (USD)

Position in Drug Manufacturers - General

Healthcare · as of Jun 30, 2026

RENAISSANCE TECHNOLOGIES LLC holds $598,181,374 across 8 Drug Manufacturers - General names. BIIB ranks #5 (2.8% of the industry book) .

# Ticker Company Shares Value (USD) Open
5 BIIB
Biogen Inc.
This page
77,744 $16,797,368

All Filings in BIIB

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26 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $16,797,368 77,744
2026-03-31 $37,288,588 203,396
2025-12-31 $70,254,504 399,196
2025-09-30 $135,093,992 964,406
2025-06-30 $131,254,862 1,045,106
2025-03-31 $110,088,601 804,506
2024-12-31 $182,312,141 1,192,206
2024-09-30 $184,672,531 952,706
2024-06-30 $143,289,332 618,106
2024-03-31 $190,768,723 884,704
2023-12-31 $196,304,474 758,606
2023-09-30 $279,214,892 1,086,397
2023-06-30 $316,051,614 1,109,537
2023-03-31 $351,384,601 1,263,837
2022-12-31 $276,996,429 1,000,276
2022-09-30 $308,253,369 1,154,507
2022-06-30 $315,292,667 1,546,007
2022-03-31 $219,909,994 1,044,207
2021-12-31 $257,627,775 1,073,807
2021-09-30 $277,813,263 981,707
2021-06-30 $460,540,138 1,330,003
2021-03-31 $542,200,819 1,938,162
2020-12-31 $743,826,403 3,037,762
2020-09-30 $1,082,795,496 3,816,961
2020-06-30 $1,045,029,431 3,905,922
2020-03-31 $1,415,456,278 4,473,912