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, 2026CallValue
$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, 2026Walleye 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.
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|
10,390 | $8,027,729 | |
| 2 | ALNY |
Alnylam Pharmaceuticals, Inc.
|
5,756 | $1,904,487 | |
| 3 | INSM |
INSMED Inc
|
7,620 | $1,246,022 | |
| 4 | ABVX |
Abivax S.A.
|
9,769 | $1,087,778 | |
| 5 | CRSP |
CRISPR Therapeutics AG
|
15,086 | $717,641 | |
| 6 | BNTX |
BioNTech SE
|
6,431 | $571,587 | |
| 7 | FOLD |
AMICUS THERAPEUTICS, INC.
|
25,604 | $370,233 | |
| 8 | MRNA |
Moderna, Inc.
|
7,257 | $368,655 |
All Filings in REGN
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50 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $4,481,312 | 5,800 | Put | Sole | 2026-05-11 | |
| 2026-03-31 | $3,785,936 | 4,900 | Call | Sole | 2026-05-11 | |
| 2026-03-31 | $8,027,729 | 10,390 | Shares | Sole | 2026-05-11 | |
| 2025-12-31 | $13,121,790 | 17,000 | Call | Sole | 2026-02-13 | |
| 2025-12-31 | $11,732,424 | 15,200 | Put | Sole | 2026-02-13 | |
| 2025-12-31 | $9,935,510 | 12,872 | Shares | Sole | 2026-02-13 | |
| 2025-09-30 | $8,715,185 | 15,500 | Put | Sole | 2025-11-14 | |
| 2025-09-30 | $2,024,172 | 3,600 | Call | Sole | 2025-11-14 | |
| 2025-09-30 | $3,091,360 | 5,498 | Shares | Sole | 2025-11-14 | |
| 2025-06-30 | $4,069,275 | 7,751 | Shares | Sole | 2025-08-13 | |
| 2025-06-30 | $4,830,000 | 9,200 | Put | Sole | 2025-08-13 | |
| 2025-06-30 | $2,782,500 | 5,300 | Call | Sole | 2025-08-13 | |
| 2025-03-31 | $6,976,530 | 11,000 | Put | Sole | 2025-05-14 | |
| 2025-03-31 | $1,872,246 | 2,952 | Shares | Sole | 2025-05-14 | |
| 2025-03-31 | $8,942,643 | 14,100 | Call | Sole | 2025-05-14 | |
| 2024-12-31 | $5,128,776 | 7,200 | Put | Sole | 2025-02-13 | |
| 2024-12-31 | $11,326,047 | 15,900 | Call | Sole | 2025-02-13 | |
| 2024-09-30 | $5,992,068 | 5,700 | Call | Sole | 2024-11-14 | |
| 2024-09-30 | $2,207,604 | 2,100 | Put | Sole | 2024-11-14 | |
| 2024-09-30 | $10,509,246 | 9,997 | Shares | Sole | 2024-11-14 | |
| 2024-06-30 | $840,824 | 800 | Put | Sole | 2024-08-14 | |
| 2024-06-30 | $12,526,175 | 11,918 | Shares | Sole | 2024-08-14 | |
| 2024-06-30 | $1,156,133 | 1,100 | Call | Sole | 2024-08-14 | |
| 2024-03-31 | $2,598,723 | 2,700 | Put | Sole | 2024-05-15 | |
| 2024-03-31 | $4,526,590 | 4,703 | Shares | Sole | 2024-05-15 | |
| 2024-03-31 | $1,251,237 | 1,300 | Call | Sole | 2024-05-15 | |
| 2023-12-31 | $11,329,941 | 12,900 | Call | Sole | 2024-02-14 | |
| 2023-12-31 | $16,511,852 | 18,800 | Put | Sole | 2024-02-14 | |
| 2023-12-31 | $1,421,073 | 1,618 | Shares | Sole | 2024-02-14 | |
| 2023-09-30 | $13,167,360 | 16,000 | Put | Sole | 2023-11-21 | |
| 2023-09-30 | $10,863,072 | 13,200 | Call | Sole | 2023-11-21 | |
| 2023-06-30 | $5,748,320 | 8,000 | Call | Sole | 2023-08-14 | |
| 2023-06-30 | $11,352,932 | 15,800 | Put | Sole | 2023-08-14 | |
| 2023-06-30 | $3,423,124 | 4,764 | Shares | Sole | 2023-08-14 | |
| 2023-03-31 | $21,281,253 | 25,900 | Call | Sole | 2023-05-15 | |
| 2023-03-31 | $26,539,941 | 32,300 | Put | Sole | 2023-05-15 | |
| 2022-12-31 | $19,696,677 | 27,300 | Put | Sole | 2023-02-14 | |
| 2022-12-31 | $8,224,986 | 11,400 | Call | Sole | 2023-02-14 | |
| 2022-09-30 | $35,890,127 | 52,100 | Put | Sole | 2022-11-14 | |
| 2022-09-30 | $15,706,236 | 22,800 | Call | Sole | 2022-11-14 | |
| 2022-06-30 | $17,970,352 | 30,400 | Put | Sole | 2022-08-08 | |
| 2022-06-30 | $3,369,441 | 5,700 | Call | Sole | 2022-08-08 | |
| 2022-06-30 | $8,562,518 | 14,485 | Shares | Sole | 2022-08-08 | |
| 2022-03-31 | $3,564,735 | 5,104 | Shares | Sole | 2022-05-16 | |
| 2022-03-31 | $16,063,660 | 23,000 | Put | Sole | 2022-05-16 | |
| 2022-03-31 | $5,028,624 | 7,200 | Call | Sole | 2022-05-16 | |
| 2021-12-31 | $2,273,472 | 3,600 | Put | Sole | 2022-02-14 | |
| 2021-12-31 | $7,325,632 | 11,600 | Call | Sole | 2022-02-14 | |
| 2021-09-30 | $5,507,138 | 9,100 | Call | Sole | 2021-11-15 | |
| 2021-09-30 | $2,904,864 | 4,800 | Put | Sole | 2021-11-15 | |
| No filing history on record for this holder in this stock. | ||||||