Rock Springs Capital Management LP
Top Portfolio Positions
98 positions ·
$1,690,777,301 total
· as of Mar 31, 2026
| Ticker | Company | Shares | Value (USD) | % of Portfolio | Open |
|---|---|---|---|---|---|
| RVMD |
Revolution Medicines, Inc.
Healthcare
|
1,209,465 | $117,620,471 | 6.96% | |
| LLY |
ELI LILLY & Co
Healthcare
|
98,700 | $90,781,299 | 5.37% | |
| MDGL |
Madrigal Pharmaceuticals, Inc.
Healthcare
|
170,999 | $89,512,846 | 5.29% | |
| MIRM |
Mirum Pharmaceuticals, Inc.
Healthcare
|
811,294 | $74,947,339 | 4.43% | |
| ARGX |
Argenx SE
Healthcare
|
98,500 | $71,929,625 | 4.25% | |
| RYTM |
Rhythm Pharmaceuticals, Inc.
Healthcare
|
689,748 | $59,987,383 | 3.55% | |
| INSM |
INSMED Inc
Healthcare
|
314,300 | $51,394,336 | 3.04% | |
| ASND |
Ascendis Pharma A/S
Healthcare
|
194,000 | $44,373,620 | 2.62% | |
| XENE |
Xenon Pharmaceuticals Inc.
Healthcare
|
763,020 | $44,369,613 | 2.62% | |
| TVTX |
Travere Therapeutics, Inc.
Healthcare
|
1,477,954 | $43,910,013 | 2.60% |
Portfolio Trend
25 quarters · across all stocks
Holdings in LEGN
Shares Held
Position Value (USD)
22 quarters on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $732,645 | 40,500 | Shares | Sole | 2026-05-15 | |
| 2025-12-31 | $734,812 | 33,800 | Shares | Sole | 2026-02-17 | |
| 2025-03-31 | $17,403,782 | 512,932 | Shares | Sole | 2025-05-15 | |
| 2024-12-31 | $16,664,775 | 512,132 | Shares | Sole | 2025-02-14 | |
| 2024-09-30 | $24,800,256 | 508,932 | Shares | Sole | 2024-11-14 | |
| 2024-06-30 | $22,401,261 | 505,786 | Shares | Sole | 2024-08-14 | |
| 2024-03-31 | $28,016,169 | 499,486 | Shares | Sole | 2024-05-15 | |
| 2023-12-31 | $29,630,355 | 492,444 | Shares | Sole | 2024-02-14 | |
| 2023-09-30 | $30,781,660 | 458,265 | Shares | Sole | 2023-11-14 | |
| 2023-06-30 | $31,634,032 | 458,265 | Shares | Sole | 2023-08-14 | |
| 2023-03-31 | $22,097,538 | 458,265 | Shares | Sole | 2023-05-15 | |
| 2022-12-31 | $22,487,262 | 450,466 | Shares | Sole | 2023-02-14 | |
| 2022-09-30 | $18,379,012 | 450,466 | Shares | Sole | 2022-11-14 | |
| 2022-06-30 | $19,556,185 | 355,567 | Shares | Sole | 2022-08-15 | |
| 2022-03-31 | $14,942,426 | 411,184 | Shares | Sole | 2022-05-16 | |
| 2021-12-31 | $18,811,050 | 403,584 | Shares | Sole | 2022-02-14 | |
| 2021-09-30 | $15,937,422 | 315,218 | Shares | Sole | 2021-11-15 | |
| 2021-06-30 | $12,832,968 | 312,618 | Shares | Sole | 2021-08-16 | |
| 2021-03-31 | $9,072,174 | 312,618 | Shares | Sole | 2021-05-17 | |
| 2020-12-31 | $8,713,210 | 309,418 | Shares | Sole | 2021-02-16 | |
| 2020-09-30 | $7,783,500 | 252,138 | Shares | Sole | 2020-11-16 | |
| 2020-06-30 | $8,762,933 | 205,896 | Shares | Sole | 2020-08-14 | |
| No 13F history on record for this holder in this stock. | ||||||