Rock Springs Capital Management LP
Position in REGN — Regeneron Pharmaceuticals, Inc.
CIK 1595725
Baltimore, MD
Position in REGN
as of Mar 31, 2026
· filed May 15, 2026
Position Value
$7,803,664
+$7,777 QoQ
Shares Held
10,100
0.0% QoQ
Ownership
0.010%
of shares outstanding
% of Portfolio
0.48%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Mar 2025
5 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in REGN Over Time
Shares Held
Position Value (USD)
Position in Biotechnology
Healthcare · as of Jun 30, 2026Rock Springs Capital Management LP holds $1,502,002,537 across 70 Biotechnology names.
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | RVMD |
Revolution Medicines, Inc.
|
1,105,210 | $206,983,728 | |
| 2 | TVTX |
Travere Therapeutics, Inc.
|
2,179,069 | $123,792,909 | |
| 3 | MDGL |
Madrigal Pharmaceuticals, Inc.
|
174,999 | $93,965,713 | |
| 4 | MIRM |
Mirum Pharmaceuticals, Inc.
|
798,145 | $93,438,835 | |
| 5 | RYTM |
Rhythm Pharmaceuticals, Inc.
|
692,598 | $76,899,155 | |
| 6 | KYMR |
Kymera Therapeutics, Inc.
|
453,156 | $51,963,398 | |
| 7 | ARGX |
Argenx SE
|
52,750 | $48,939,867 | |
| 8 | ASND |
Ascendis Pharma A/S
|
168,750 | $45,009,000 |
All Filings in REGN
Export CSV
5 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $7,803,664 | 10,100 | Shares | Sole | 2026-05-15 | |
| 2025-12-31 | $7,795,887 | 10,100 | Shares | Sole | 2026-02-17 | |
| 2025-09-30 | $6,353,651 | 11,300 | Shares | Sole | 2025-11-14 | |
| 2025-06-30 | $5,932,500 | 11,300 | Shares | Sole | 2025-08-14 | |
| 2025-03-31 | $1,775,844 | 2,800 | Shares | Sole | 2025-05-15 | |
| No filing history on record for this holder in this stock. | ||||||