Holders — by stockHoldings — by fund
RTW INVESTMENTS, LP
Everything this manager disclosed owning in US-listed stocks — its complete Form 13F portfolio · as of 2026-06-30 · filed with the SEC up to 45 days after quarter end · CIK 0001493215
$11.71B
disclosed book value
84
positions
9.1%
largest position share
Positions, as of 2026-06-30
top 84 of 84 · 13F covers long US-listed positions only — cash, bonds, private and foreign stakes are not disclosed · PUT/CALL tags = options positions (share-equivalents), not shares held
| # | Issuer | Shares | Value | % of book |
|---|---|---|---|---|
| 1 | MDGLMADRIGAL PHARMACEUTICALS INC | 2.0M | $1.07B | 9.1% |
| 2 | ARGXARGENX SE | 709,446 | $658.2M | 5.6% |
| 3 | PTCTPTC THERAPEUTICS INC | 7.7M | $631.9M | 5.4% |
| 4 | PTGXPROTAGONIST THERAPEUTICS INC | 5.1M | $620.4M | 5.3% |
| 5 | CGONCG ONCOLOGY INC | 8.5M | $605.0M | 5.2% |
| 6 | INSMINSMED INC | 4.8M | $516.3M | 4.4% |
| 7 | TNGXTANGO THERAPEUTICS INC | 13.9M | $434.5M | 3.7% |
| 8 | SYRESPYRE THERAPEUTICS INC | 4.3M | $377.5M | 3.2% |
| 9 | CELCCELCUITY INC | 3.3M | $345.8M | 3% |
| 10 | ERASERASCA INC | 17.9M | $328.8M | 2.8% |
| 11 | RDNTRADNET INC | 4.8M | $298.9M | 2.6% |
| 12 | ORKAORUKA THERAPEUTICS INC | 3.1M | $298.7M | 2.6% |
| 13 | NTRANATERA INC | 1.0M | $271.4M | 2.3% |
| 14 | RAREULTRAGENYX PHARMACEUTICAL IN | 7.8M | $260.3M | 2.2% |
| 15 | IRTCIRHYTHM HOLDINGS INC | 2.2M | $259.6M | 2.2% |
| 16 | CYTKCYTOKINETICS INC | 2.9M | $243.8M | 2.1% |
| 17 | KLRAKAILERA THERAPEUTICS INC | 10.8M | $237.4M | 2% |
| 18 | ESTABLISHMENT LABS HLDGS INC | 2.7M | $227.9M | 1.9% |
| 19 | GHGUARDANT HEALTH INC | 1.5M | $222.2M | 1.9% |
| 20 | NBIXNEUROCRINE BIOSCIENCES INC | 1.3M | $213.7M | 1.8% |
| 21 | TARSTARSUS PHARMACEUTICALS INC | 3.4M | $211.3M | 1.8% |
| 22 | STOKSTOKE THERAPEUTICS INC | 5.6M | $184.0M | 1.6% |
| 23 | UNIQURE NV | 3.9M | $181.5M | 1.5% |
| 24 | ACADACADIA PHARMACEUTICALS INC | 7.1M | $180.8M | 1.5% |
| 25 | RGENREPLIGEN CORP | 1.2M | $169.3M | 1.4% |
| 26 | UROGEN PHARMA LTD | 4.5M | $167.2M | 1.4% |
| 27 | GH RESEARCH PLC | 5.9M | $159.5M | 1.4% |
| 28 | IMCRIMMUNOCORE HLDGS PLC | 4.9M | $154.6M | 1.3% |
| 29 | CMPSCOMPASS PATHWAYS PLC | 10.7M | $151.4M | 1.3% |
| 30 | IMMATICS N.V | 12.9M | $131.1M | 1.1% |
| 31 | ZLABZAI LAB LTD | 6.6M | $124.9M | 1.1% |
| 32 | IMVTIMMUNOVANT INC | 3.2M | $122.4M | 1% |
| 33 | BLTEBELITE BIO INC | 715,332 | $110.2M | 0.9% |
| 34 | XNCRXENCOR INC | 6.8M | $109.1M | 0.9% |
| 35 | TSHATAYSHA GENE THERAPIES INC | 13.6M | $92.3M | 0.8% |
| 36 | COGTCOGENT BIOSCIENCES INC | 2.3M | $89.4M | 0.8% |
| 37 | ALKERMES PLC | 1.7M | $87.6M | 0.7% |
| 38 | GPCRSTRUCTURE THERAPEUTICS INC | 1.6M | $86.3M | 0.7% |
| 39 | REPLREPLIMUNE GROUP INC | 7.4M | $82.0M | 0.7% |
| 40 | CSTLCASTLE BIOSCIENCES INC | 2.8M | $66.3M | 0.6% |
| 41 | CADLCANDEL THERAPEUTICS INC | 6.4M | $66.1M | 0.6% |
| 42 | RCKTROCKET PHARMACEUTICALS INC | 17.7M | $60.5M | 0.5% |
| 43 | KODKODIAK SCIENCES INC | 1.5M | $58.0M | 0.5% |
| 44 | AKTSAKTIS ONCOLOGY INC | 1.6M | $51.3M | 0.4% |
| 45 | AXGNAXOGEN INC | 1.0M | $46.7M | 0.4% |
| 46 | DHRDANAHER CORP DEL | 230,000 | $43.8M | 0.4% |
| 47 | CGEMCULLINAN THERAPEUTICS INC | 2.4M | $43.1M | 0.4% |
| 48 | NGNENEUROGENE INC | 1.4M | $42.8M | 0.4% |
| 49 | HNGEHINGE HEALTH INC | 500,000 | $41.5M | 0.4% |
| 50 | OBIOORCHESTRA BIOMED HLDGS INC | 9.6M | $41.2M | 0.4% |
| 51 | SLDBSOLID BIOSCIENCES INC | 3.9M | $38.9M | 0.3% |
| 52 | SVRASAVARA INC | 6.0M | $36.7M | 0.3% |
| 53 | AQSTAQUESTIVE THERAPEUTICS INC | 7.4M | $30.9M | 0.3% |
| 54 | KYMRKYMERA THERAPEUTICS INC | 240,000 | $27.5M | 0.2% |
| 55 | VSTMVERASTEM INC | 6.6M | $25.3M | 0.2% |
| 56 | DNTHDIANTHUS THERAPEUTICS INC | 248,063 | $24.2M | 0.2% |
| 57 | BBNXBETA BIONICS INC | 1.5M | $23.5M | 0.2% |
| 58 | IPSCCENTURY THERAPEUTICS INC | 8.7M | $21.3M | 0.2% |
| 59 | EVMNEVOMMUNE INC | 1.5M | $20.0M | 0.2% |
| 60 | BEAMBEAM THERAPEUTICS INC | 570,394 | $19.6M | 0.2% |
| 61 | DFTXDEFINIUM THERAPEUTICS INC | 400,000 | $18.8M | 0.2% |
| 62 | IDYAIDEAYA BIOSCIENCES INC | 370,370 | $13.8M | 0.1% |
| 63 | ATAIATAIBECKLEY INC | 2.0M | $10.5M | 0.1% |
| 64 | MISTMILESTONE PHARMACEUTICALS IN | 7.8M | $10.5M | 0.1% |
| 65 | OCGNOCUGEN INC | 6.7M | $10.2M | 0.1% |
| 66 | TENXTENAX THERAPEUTICS INC | 696,570 | $10.1M | 0.1% |
| 67 | HTFLHEARTFLOW INC | 295,000 | $8.7M | 0.1% |
| 68 | PERCEPTIVE CAP SOLUTIONS COR | 742,500 | $8.1M | 0.1% |
| 69 | WAVE LIFE SCIENCES LTD | 1.4M | $7.8M | 0.1% |
| 70 | LRMRLARIMAR THERAPEUTICS INC | 2.6M | $7.8M | 0.1% |
| 71 | LMRILUMEXA IMAGING HOLDINGS INC | 650,000 | $7.3M | 0.1% |
| 72 | ALLOALLOGENE THERAPEUTICS INC | 3.3M | $6.8M | 0.1% |
| 73 | CRESCENT BIOPHARMA INC. | 372,856 | $6.7M | 0.1% |
| 74 | FDMT4D MOLECULAR THERAPEUTICS IN | 475,737 | $6.3M | 0.1% |
| 75 | MAZEMAZE THERAPEUTICS INC | 212,000 | $6.3M | 0.1% |
| 76 | CAPRCAPRICOR THERAPEUTICS INC | 250,000 | $6.0M | 0.1% |
| 77 | KLRSKALARIS THERAPEUTICS INC | 1.3M | $5.3M | 0% |
| 78 | ABVXABIVAX SA | 26,400 | $3.5M | 0% |
| 79 | AVTXAVALO THERAPEUTICS INC | 175,000 | $3.2M | 0% |
| 80 | MDLNMEDLINE INC | 70,000 | $2.8M | 0% |
| 81 | IRONDISC MEDICINE INC | 30,000 | $2.2M | 0% |
| 82 | IMAIMAGENEBIO INC | 334,445 | $2.0M | 0% |
| 83 | XGNEXAGEN INC | 195,000 | $906,750 | 0% |
| 84 | RCKTWROCKET PHARMACEUTICALS INC | 350,000 | $1,190 | 0% |
Source: SEC Form 13F-HR, reporting period 2026-06-30. Values are the manager's filed June-30-style quarter-end marks, not live prices. Research, not investment advice.