Position in REGN
as of Mar 31, 2026
· filed May 4, 2026
Position Value
$9,111,743
+$9,081 QoQ
Shares Held
11,793
0.0% QoQ
Ownership
0.011%
of shares outstanding
% of Portfolio
0.05%
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)
Position in Biotechnology
Healthcare · as of Mar 31, 2026Calamos Advisors LLC holds $103,200,124 across 23 Biotechnology names. REGN ranks #3 (8.8% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | VRTX |
Vertex Pharmaceuticals Inc / Ma
|
77,886 | $34,779,214 | |
| 2 | RPRX |
Royalty Pharma plc
|
437,090 | $20,967,207 | |
| 3 | REGN |
Regeneron Pharmaceuticals, Inc.
This page
|
11,793 | $9,111,743 | |
| 4 | INSM |
INSMED Inc
|
36,373 | $5,947,712 | |
| 5 | HALO |
Halozyme Therapeutics, Inc.
|
73,600 | $4,756,768 | |
| 6 | LGND |
Ligand Pharmaceuticals Inc
|
20,860 | $4,164,698 | |
| 7 | ASND |
Ascendis Pharma A/S
|
15,390 | $3,520,154 | |
| 8 | TARS |
Tarsus Pharmaceuticals, Inc.
|
43,832 | $3,074,814 |
All Filings in REGN
Export CSV
25 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $9,111,743 | 11,793 | Shares | Sole | 2026-05-04 | |
| 2025-12-31 | $9,102,662 | 11,793 | Shares | Sole | 2026-01-29 | |
| 2025-09-30 | $6,900,177 | 12,272 | Shares | Sole | 2025-10-20 | |
| 2025-06-30 | $6,442,800 | 12,272 | Shares | Sole | 2025-08-08 | |
| 2025-03-31 | $7,783,270 | 12,272 | Shares | Sole | 2025-04-29 | |
| 2024-12-31 | $16,139,973 | 22,658 | Shares | Sole | 2025-01-24 | |
| 2024-09-30 | $12,756,797 | 12,135 | Shares | Sole | 2024-11-07 | |
| 2024-06-30 | $13,067,455 | 12,433 | Shares | Sole | 2024-07-25 | |
| 2024-03-31 | $12,403,608 | 12,887 | Shares | Sole | 2024-05-08 | |
| 2023-12-31 | $11,603,089 | 13,211 | Shares | Sole | 2024-01-31 | |
| 2023-09-30 | $11,014,496 | 13,384 | Shares | Sole | 2023-10-26 | |
| 2023-06-30 | $9,616,939 | 13,384 | Shares | Sole | 2023-07-28 | |
| 2023-03-31 | $10,997,231 | 13,384 | Shares | Sole | 2023-05-04 | |
| 2022-12-31 | $10,873,575 | 15,071 | Shares | Sole | 2023-01-26 | |
| 2022-09-30 | $12,215,042 | 17,732 | Shares | Sole | 2022-10-24 | |
| 2022-06-30 | $10,492,557 | 17,750 | Shares | Sole | 2022-08-01 | |
| 2022-03-31 | $12,052,633 | 17,257 | Shares | Sole | 2022-05-03 | |
| 2021-12-31 | $9,436,171 | 14,942 | Shares | Sole | 2022-02-01 | |
| 2021-09-30 | $8,692,805 | 14,364 | Shares | Sole | 2021-10-26 | |
| 2021-06-30 | $7,314,639 | 13,096 | Shares | Sole | 2021-07-22 | |
| 2021-03-31 | $4,786,757 | 10,117 | Shares | Sole | 2021-04-12 | |
| 2020-12-31 | $4,736,410 | 9,804 | Shares | Sole | 2021-01-27 | |
| 2020-09-30 | $5,725,989 | 10,229 | Shares | Sole | 2020-10-26 | |
| 2020-06-30 | $6,947,461 | 11,140 | Shares | Sole | 2020-07-27 | |
| 2020-03-31 | $5,787,213 | 11,852 | Shares | Sole | 2020-04-28 | |
| No filing history on record for this holder in this stock. | ||||||