RTW INVESTMENTS, LP
Top Portfolio Positions
87 positions ·
$10,049,745,359 total
· as of Mar 31, 2026
| Ticker | Company | Shares | Value (USD) | % of Portfolio | Open |
|---|---|---|---|---|---|
| MDGL |
Madrigal Pharmaceuticals, Inc.
Healthcare
|
1,993,687 | $1,043,635,333 | 10.38% | |
| INSM |
INSMED Inc
Healthcare
|
4,842,880 | $791,907,737 | 7.88% | |
| PTGX |
Protagonist Therapeutics, Inc
Healthcare
|
5,059,053 | $533,224,186 | 5.31% | |
| PTCT |
Ptc Therapeutics, Inc.
Healthcare
|
7,746,415 | $527,763,253 | 5.25% | |
| ARGX |
Argenx SE
Healthcare
|
709,446 | $518,072,941 | 5.16% | |
| CGON |
CG Oncology, Inc.
Healthcare
|
6,984,808 | $472,731,805 | 4.70% | |
| CELC |
Celcuity Inc.
Healthcare
|
3,039,621 | $346,942,340 | 3.45% | |
| TNGX |
Tango Therapeutics, Inc.
Healthcare
|
13,300,620 | $278,248,970 | 2.77% | |
| ERAS |
Erasca, Inc.
Healthcare
|
16,157,175 | $261,423,091 | 2.60% | |
| NTRA |
Natera, Inc.
Healthcare
|
1,250,000 | $249,987,500 | 2.49% |
Portfolio Trend
25 quarters · across all stocks
Holdings in CSTL
Shares Held
Position Value (USD)
15 quarters on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $67,717,124 | 2,758,335 | Shares | Sole | 2026-05-15 | |
| 2025-12-31 | $82,282,719 | 2,115,237 | Shares | Sole | 2026-02-17 | |
| 2023-03-31 | $5,873,074 | 258,498 | Shares | Sole | 2023-05-15 | |
| 2022-12-31 | $12,170,062 | 516,995 | Shares | Sole | 2023-02-14 | |
| 2022-09-30 | $13,483,229 | 516,995 | Shares | Sole | 2022-11-14 | |
| 2022-06-30 | $20,057,668 | 913,789 | Shares | Sole | 2022-08-15 | |
| 2022-03-31 | $22,280,840 | 496,675 | Shares | Sole | 2022-05-16 | |
| 2021-12-31 | $25,679,515 | 599,009 | Shares | Sole | 2022-02-14 | |
| 2021-09-30 | $39,834,098 | 599,009 | Shares | Sole | 2021-11-15 | |
| 2021-06-30 | $58,591,329 | 799,009 | Shares | Sole | 2021-08-13 | |
| 2021-03-31 | $54,700,156 | 799,009 | Shares | Sole | 2021-05-14 | |
| 2020-12-31 | $53,653,454 | 799,009 | Shares | Sole | 2021-02-16 | |
| 2020-09-30 | $38,260,380 | 743,642 | Shares | Sole | 2020-11-16 | |
| 2020-06-30 | $30,284,291 | 803,510 | Shares | Sole | 2020-08-14 | |
| 2020-03-31 | $20,810,897 | 698,118 | Shares | Sole | 2020-05-15 | |
| No 13F history on record for this holder in this stock. | ||||||