GTS SECURITIES LLC
Broker-DealerPosition in REGN — Regeneron Pharmaceuticals, Inc.
CIK 1452765
NEW YORK, NY
Position in REGN
as of Mar 31, 2026
· filed May 15, 2026
Position Value
$592,614
-$268,792 QoQ
Shares Held
767
-31.3% QoQ
Ownership
0.001%
of shares outstanding
% of Portfolio
0.06%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Sep 2023
11 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 Sep 30, 2024CallValue
$12,194,384
CallShares
11,600
PutValue
$29,224,472
PutShares
27,800
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, 2026GTS SECURITIES LLC holds $7,337,364 across 30 Biotechnology names. REGN ranks #4 (8.1% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | VRTX |
Vertex Pharmaceuticals Inc / Ma
|
1,738 | $776,086 | |
| 2 | ACLX |
Arcellx, Inc.
|
6,338 | $727,729 | |
| 3 | APLS |
Apellis Pharmaceuticals, Inc.
|
15,604 | $627,748 | |
| 4 | REGN |
Regeneron Pharmaceuticals, Inc.
This page
|
767 | $592,614 | |
| 5 | CRSP |
CRISPR Therapeutics AG
|
7,787 | $370,427 | |
| 6 | ALNY |
Alnylam Pharmaceuticals, Inc.
|
1,052 | $348,075 | |
| 7 | INSM |
INSMED Inc
|
1,991 | $325,568 | |
| 8 | ABVX |
Abivax S.A.
|
2,652 | $295,300 |
All Filings in REGN
Export CSV
21 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $592,614 | 767 | Shares | Defined | 2026-05-15 | |
| 2025-12-31 | $861,406 | 1,116 | Shares | Defined | 2026-02-13 | |
| 2025-09-30 | $1,407,361 | 2,503 | Shares | Defined | 2025-11-14 | |
| 2025-06-30 | $423,150 | 806 | Shares | Defined | 2025-08-08 | |
| 2025-03-31 | $456,011 | 719 | Shares | Defined | 2025-05-15 | |
| 2024-12-31 | $959,508 | 1,347 | Shares | Defined | 2025-02-18 | |
| 2024-09-30 | $4,619,148 | 4,394 | Shares | Defined | 2024-11-13 | |
| 2024-09-30 | $29,224,472 | 27,800 | Put | Defined | 2024-11-13 | |
| 2024-09-30 | $12,194,384 | 11,600 | Call | Defined | 2024-11-13 | |
| 2024-06-30 | $8,133,921 | 7,739 | Shares | Defined | 2024-08-14 | |
| 2024-06-30 | $20,389,982 | 19,400 | Put | Defined | 2024-08-14 | |
| 2024-06-30 | $9,249,064 | 8,800 | Call | Defined | 2024-08-14 | |
| 2024-03-31 | $15,784,836 | 16,400 | Put | Defined | 2024-05-15 | |
| 2024-03-31 | $12,704,868 | 13,200 | Call | Defined | 2024-05-15 | |
| 2024-03-31 | $3,421,651 | 3,555 | Shares | Defined | 2024-05-15 | |
| 2023-12-31 | $18,092,774 | 20,600 | Put | Defined | 2024-02-15 | |
| 2023-12-31 | $20,464,157 | 23,300 | Call | Defined | 2024-02-15 | |
| 2023-12-31 | $3,283,048 | 3,738 | Shares | Defined | 2024-02-15 | |
| 2023-09-30 | $15,142,464 | 18,400 | Put | Defined | 2023-11-15 | |
| 2023-09-30 | $19,668,744 | 23,900 | Call | Defined | 2023-11-15 | |
| 2023-09-30 | $489,661 | 595 | Shares | Defined | 2023-11-15 | |
| No filing history on record for this holder in this stock. | ||||||