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Walleye Trading LLC

Position in REGN — Regeneron Pharmaceuticals, Inc.

CIK 1388391 NEW YORK, NY

Position in REGN

as of Mar 31, 2026 · filed May 11, 2026
Position Value
$8,027,729
-$1,907,781 QoQ
Shares Held
10,390
-19.3% QoQ
Ownership
0.010%
of shares outstanding
% of Portfolio
0.18%
of 13F equity value
Holder Rank
not a current holder
Holding Since
Mar 2020
25 quarters on record
Voting authority Sole 100.ToString("F0")% Shared 0.ToString("F0")% None 0.ToString("F0")%

Common Shares in REGN Over Time

Shares Held

Position Value (USD)

Derivatives in REGN

reported options exposure · as of Mar 31, 2026
CallValue
$3,785,936
CallShares
4,900
PutValue
$4,481,312
PutShares
5,800

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 Biotechnology

Healthcare · as of Mar 31, 2026

Walleye Trading LLC holds $17,472,598 across 36 Biotechnology names. REGN ranks #1 (45.9% of the industry book) .

# Ticker Company Shares Value (USD) Open
1 REGN
Regeneron Pharmaceuticals, Inc.
This page
10,390 $8,027,729

All Filings in REGN

Export CSV
50 filing rows on record
Report Date Value (USD) Shares
2026-03-31 $4,481,312 5,800
2026-03-31 $3,785,936 4,900
2026-03-31 $8,027,729 10,390
2025-12-31 $13,121,790 17,000
2025-12-31 $11,732,424 15,200
2025-12-31 $9,935,510 12,872
2025-09-30 $8,715,185 15,500
2025-09-30 $2,024,172 3,600
2025-09-30 $3,091,360 5,498
2025-06-30 $4,069,275 7,751
2025-06-30 $4,830,000 9,200
2025-06-30 $2,782,500 5,300
2025-03-31 $6,976,530 11,000
2025-03-31 $1,872,246 2,952
2025-03-31 $8,942,643 14,100
2024-12-31 $5,128,776 7,200
2024-12-31 $11,326,047 15,900
2024-09-30 $5,992,068 5,700
2024-09-30 $2,207,604 2,100
2024-09-30 $10,509,246 9,997
2024-06-30 $840,824 800
2024-06-30 $12,526,175 11,918
2024-06-30 $1,156,133 1,100
2024-03-31 $2,598,723 2,700
2024-03-31 $4,526,590 4,703
2024-03-31 $1,251,237 1,300
2023-12-31 $11,329,941 12,900
2023-12-31 $16,511,852 18,800
2023-12-31 $1,421,073 1,618
2023-09-30 $13,167,360 16,000
2023-09-30 $10,863,072 13,200
2023-06-30 $5,748,320 8,000
2023-06-30 $11,352,932 15,800
2023-06-30 $3,423,124 4,764
2023-03-31 $21,281,253 25,900
2023-03-31 $26,539,941 32,300
2022-12-31 $19,696,677 27,300
2022-12-31 $8,224,986 11,400
2022-09-30 $35,890,127 52,100
2022-09-30 $15,706,236 22,800
2022-06-30 $17,970,352 30,400
2022-06-30 $3,369,441 5,700
2022-06-30 $8,562,518 14,485
2022-03-31 $3,564,735 5,104
2022-03-31 $16,063,660 23,000
2022-03-31 $5,028,624 7,200
2021-12-31 $2,273,472 3,600
2021-12-31 $7,325,632 11,600
2021-09-30 $5,507,138 9,100
2021-09-30 $2,904,864 4,800