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Walleye Trading LLC

Position in BIIB — Biogen Inc.

CIK 1388391 NEW YORK, NY

Position in BIIB

as of Jun 30, 2026 · filed Aug 3, 2026
Position Value
$30,087,003
+$11,839,802 QoQ
Shares Held
139,253
+39.9% QoQ
Ownership
0.094%
of shares outstanding
% of Portfolio
0.44%
of 13F equity value
Holder Rank
#84
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)

Derivatives in BIIB

reported options exposure · as of Jun 30, 2026
CallValue
$6,784,284
CallShares
31,400
PutValue
$7,216,404
PutShares
33,400

Notional value of option positions as reported on Form 13F. Calls and puts are disclosed separately and do not net against the common-share stake above.

Position in Drug Manufacturers - General

Healthcare · as of Jun 30, 2026

Walleye Trading LLC holds $52,377,864 across 7 Drug Manufacturers - General names. BIIB ranks #1 (57.4% of the industry book) .

# Ticker Company Shares Value (USD) Open
1 BIIB
Biogen Inc.
This page
139,253 $30,087,003

All Filings in BIIB

Export CSV
50 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $7,216,404 33,400
2026-06-30 $6,784,284 31,400
2026-06-30 $30,087,003 139,253
2026-03-31 $2,108,295 11,500
2026-03-31 $18,247,201 99,532
2026-03-31 $1,154,979 6,300
2025-12-31 $16,810,916 95,522
2025-12-31 $3,273,414 18,600
2025-12-31 $6,071,655 34,500
2025-09-30 $1,891,080 13,500
2025-09-30 $448,256 3,200
2025-06-30 $1,456,844 11,600
2025-06-30 $2,436,446 19,400
2025-03-31 $1,531,376 11,191
2025-03-31 $4,447,300 32,500
2025-03-31 $5,637,808 41,200
2024-12-31 $1,620,952 10,600
2024-12-31 $2,309,092 15,100
2024-09-30 $2,015,936 10,400
2024-09-30 $3,315,051 17,102
2024-09-30 $3,547,272 18,300
2024-06-30 $2,897,750 12,500
2024-06-30 $4,798,674 20,700
2024-06-30 $3,208,156 13,839
2024-03-31 $33,853 157
2024-03-31 $905,646 4,200
2024-03-31 $6,167,018 28,600
2023-12-31 $7,685,469 29,700
2023-12-31 $6,339,865 24,500
2023-09-30 $4,420,572 17,200
2023-09-30 $8,918,247 34,700
2023-06-30 $5,896,395 20,700
2023-06-30 $1,936,980 6,800
2023-06-30 $10,596,420 37,200
2023-03-31 $10,731,958 38,600
2023-03-31 $5,061,258 18,204
2023-03-31 $18,266,571 65,700
2022-12-31 $22,292,060 80,500
2022-12-31 $40,402,628 145,900
2022-09-30 $37,994,100 142,300
2022-09-30 $26,139,300 97,900
2022-09-30 $403,437 1,511
2022-06-30 $5,984,415 29,344
2022-06-30 $27,695,052 135,800
2022-06-30 $14,806,044 72,600
2022-03-31 $4,254,120 20,200
2022-03-31 $16,616,340 78,900
2022-03-31 $4,003,716 19,011
2021-12-31 $13,747,416 57,300
2021-12-31 $1,170,089 4,877