Position in REGN
as of Mar 31, 2026
· filed May 15, 2026
Position Value
$903,988
+$641,553 QoQ
Shares Held
1,170
+244.1% QoQ
Ownership
0.001%
of shares outstanding
% of Portfolio
0.18%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Mar 2020
14 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in REGN Over Time
Shares Held
Position Value (USD)
Derivatives in REGN
reported options exposure · as of Dec 31, 2021CallValue
$0
CallShares
0
PutValue
$6,315,200
PutShares
10,000
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, 2026CSS LLC/IL holds $14,889,923 across 15 Biotechnology names. REGN ranks #4 (6.1% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | IONS |
Ionis Pharmaceuticals Inc
|
79,093 | $5,939,093 | |
| 2 | APLS |
Apellis Pharmaceuticals, Inc.
|
42,818 | $1,722,568 | |
| 3 | INCY |
Incyte Corp
|
12,068 | $1,135,840 | |
| 4 | REGN |
Regeneron Pharmaceuticals, Inc.
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|
1,170 | $903,988 | |
| 5 | BMRN |
Biomarin Pharmaceutical Inc
|
15,980 | $902,710 | |
| 6 | ACLX |
Arcellx, Inc.
|
7,600 | $872,632 | |
| 7 | EXEL |
Exelixis, Inc.
|
15,879 | $681,050 | |
| 8 | CNTA |
Centessa Pharmaceuticals plc
|
17,000 | $675,240 |
All Filings in REGN
Export CSV
20 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $903,988 | 1,170 | Shares | Sole | 2026-05-15 | |
| 2025-12-31 | $262,435 | 340 | Shares | Sole | 2026-02-17 | |
| 2025-06-30 | $378,000 | 720 | Shares | Sole | 2025-08-14 | |
| 2025-03-31 | $431,276 | 680 | Shares | Sole | 2025-05-15 | |
| 2024-12-31 | $434,521 | 610 | Shares | Sole | 2025-02-18 | |
| 2023-03-31 | $246,501 | 300 | Shares | Sole | 2023-05-15 | |
| 2022-12-31 | $360,745 | 500 | Shares | Sole | 2023-02-14 | |
| 2022-09-30 | $413,322 | 600 | Shares | Sole | 2022-11-14 | |
| 2022-06-30 | $354,678 | 600 | Shares | Sole | 2022-08-15 | |
| 2022-03-31 | $419,052 | 600 | Shares | Sole | 2022-05-16 | |
| 2021-12-31 | $6,315,200 | 10,000 | Put | Sole | 2022-02-14 | |
| 2021-12-31 | $505,216 | 800 | Shares | Sole | 2022-02-14 | |
| 2020-09-30 | $4,926,064 | 8,800 | Put | Sole | 2020-11-16 | |
| 2020-09-30 | $315,715 | 564 | Shares | Sole | 2020-11-16 | |
| 2020-09-30 | $2,127,164 | 3,800 | Call | Sole | 2020-11-16 | |
| 2020-06-30 | $3,617,170 | 5,800 | Put | Sole | 2020-08-14 | |
| 2020-06-30 | $560,661 | 899 | Shares | Sole | 2020-08-14 | |
| 2020-06-30 | $1,122,570 | 1,800 | Call | Sole | 2020-08-14 | |
| 2020-03-31 | $1,953,160 | 4,000 | Call | Sole | 2020-05-15 | |
| 2020-03-31 | $1,953,160 | 4,000 | Put | Sole | 2020-05-15 | |
| No filing history on record for this holder in this stock. | ||||||