RTW INVESTMENTS, LP
CIK 1493215
13F filing for Q2 2026・No. 508
- Holdings
- US$11.71B
- Quarter change
- +US$1.66B
- Entries
- 84
- Net bought (estimate)
- +US$161.95M
The quarter change is the holdings' value against the quarter before, price moves included — not what was bought or sold; each institution's page estimates that.
Net bought (estimate)
Each stock's change in shares at the quarter-end price, added up: a new position counts as bought, one sold out as sold, shares held long only. Splits are compared split-adjusted; corporate actions under a new CUSIP are not estimated. An estimate from the filings, not actual trades.
- New 9
- Sold out 13
- Cut 7
- Added 27
- Corporate actions 0
- Unchanged 41
Largest holdings
84 stocks worth US$11.71B, options and bonds left out.
| Stock | This quarter | Shares | Value | Weight |
|---|---|---|---|---|
| MDGLMADRIGAL PHARMACEUTICALS INCCOM | Unchanged | 1,993,687 | US$1.07B | 9.14% |
| ARGXARGENX SESPONSORED ADR | Unchanged | 709,446 | US$658.2M | 5.62% |
| PTCTPTC THERAPEUTICS INCCOM | Unchanged | 7,746,415 | US$631.88M | 5.39% |
| PTGXPROTAGONIST THERAPEUTICS INCCOM | Added | 5,061,175 | US$620.4M | 5.30% |
| CG ONCOLOGY INCCOM | Added | 8,514,590 | US$604.96M | 5.16% |
| INSMINSMED INCCOM PAR $.01 | Unchanged | 4,842,880 | US$516.35M | 4.41% |
| TANGO THERAPEUTICS INCCOM | Added | 13,900,620 | US$434.53M | 3.71% |
| SYRESPYRE THERAPEUTICS INCCOM NEW | Added | 4,251,996 | US$377.49M | 3.22% |
| CELCUITY INCCOM | Added | 3,304,903 | US$345.76M | 2.95% |
| ERASCA INCCOM | Added | 17,946,754 | US$328.78M | 2.81% |
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Filings
The quarter's original 13F filings (SEC).
- 13F-HRFiled August 14, 2026SEC ↗
13F covers long positions in US-listed securities only; the data is SEC's, filed within 45 days of the quarter's end.