Fund · 13F portfolio

RTW Investments

RTW Investments · 2026 Q2 13F · period ended Jun 30, 2026 · filed Aug 14, 2026
Reported value
$11.7B
2026 Q2 filing
Stocks held
82
as of Jun 30, 2026
Opened / added
9 / 25
vs previous quarter
Trimmed / exited
8 / 9
vs previous quarter

Holdings · 2026 Q2

TickerCompanyWeightSharesChange
MDGLMADRIGAL PHARMACEUTICALS INC9.14%1,993,687HELD
ARGXARGENX SE - ADR5.62%709,446HELD
PTCTPTC THERAPEUTICS, INC.5.39%7,746,415HELD
PTGXProtagonist Therapeutics, Inc5.30%5,061,175HELD
CGONCG ONCOLOGY INC5.16%8,514,590ADDED (+21.9%)
INSMINSMED Inc4.41%4,842,880HELD
TNGXTANGO THERAPEUTICS INC3.71%13,900,620ADDED (+4.5%)
SYRESPYRE THERAPEUTICS INC3.22%4,251,996ADDED (+1.9%)
CELCCelcuity Inc.2.95%3,304,903ADDED (+8.7%)
ERASERASCA INC2.81%17,946,754ADDED (+11.1%)
RDNTRadNet, Inc.2.55%4,846,958ADDED (+13.1%)
ORKAOruka Therapeutics, Inc.2.55%3,139,030ADDED (+52.5%)
NTRANatera, Inc.2.32%1,000,000TRIMMED (-20.0%)
RAREUltragenyx Pharmaceutical Inc.2.22%7,796,895ADDED (+113.7%)
IRTCiRhythm Holdings, Inc.2.22%2,182,631ADDED (+30.8%)
CYTKCYTOKINETICS INC2.08%2,862,003ADDED (+5.2%)
KLRAKAILERA THERAPEUTICS INC2.03%10,776,820NEW
ESTAESTABLISHMENT LABS HOLDINGS INC.1.95%2,655,695HELD
GHGuardant Health, Inc.1.90%1,481,033HELD
NBIXNEUROCRINE BIOSCIENCES INC1.82%1,267,925ADDED (+19.4%)
TARSTARSUS PHARMACEUTICALS INC1.80%3,357,059ADDED (+0.3%)
STOKSTOKE THERAPEUTICS INC1.57%5,623,525HELD
QUREuniQure N.V.1.55%3,941,572ADDED (+52.4%)
ACADACADIA PHARMACEUTICALS INC1.54%7,144,524HELD
RGENREPLIGEN CORP1.45%1,240,637ADDED (+2.9%)
URGNUroGen Pharma Ltd.1.43%4,543,895HELD
GHRSGH Research PLC1.36%5,933,815HELD
IMCRIMMUNOCORE HOLDINGS PLC-ADR1.32%4,869,798HELD
CMPSCOMPASS Pathways plc1.29%10,700,974ADDED (+0.6%)
IMTXImmatics N.V.1.12%12,946,176ADDED (+0.6%)
ZLABZai Lab Ltd1.07%6,574,032HELD
IMVTImmunovant, Inc.1.05%3,177,849HELD
BLTEBELITE BIO, INC0.94%715,332HELD
XNCRXENCOR INC0.93%6,777,461HELD
TSHATaysha Gene Therapies, Inc.0.79%13,560,258TRIMMED (-0.9%)
COGTCOGENT BIOSCIENCES INC0.76%2,309,021TRIMMED (-57.7%)
ALKSAlkermes plc.0.75%1,672,356HELD
GPCRSTRUCTURE THERAPEUTICS INC0.74%1,607,507NEW
REPLREPLIMUNE GROUP INC0.70%7,411,581ADDED (+0.7%)
CSTLCASTLE BIOSCIENCES INC0.57%2,778,335ADDED (+0.7%)
CADLCANDEL THERAPEUTICS INC0.56%6,422,018HELD
RCKTROCKET PHARMACEUTICALS, INC.0.52%17,687,772HELD
KODKodiak Sciences Inc.0.49%1,487,934HELD
AKTSAktis Oncology, Inc.0.44%1,592,043HELD
AXGNAxogen, Inc.0.40%1,011,576NEW
DHRDANAHER CORP /DE/0.37%230,000NEW
CGEMCullinan Therapeutics, Inc.0.37%2,364,347ADDED (+38.6%)
NGNENEUROGENE INC0.37%1,362,456HELD
HNGEHinge Health, Inc.0.35%500,000TRIMMED (-74.1%)
OBIOORCHESTRA BIOMED HOLDINGS IN0.35%9,556,063ADDED (+15.0%)
SLDBSOLID BIOSCIENCES INC0.33%3,892,926NEW
SVRASAVARA INC0.31%5,952,380HELD
AQSTAQUESTIVE THERAPEUTICS INC0.26%7,426,471HELD
KYMRKYMERA THERAPEUTICS INC0.23%240,000HELD
VSTMVerastem, Inc.0.22%6,635,793ADDED (+0.9%)
DNTHDianthus Therapeutics, Inc. /DE/0.21%248,063HELD
BBNXBeta Bionics, Inc.0.20%1,500,000TRIMMED (-25.0%)
IPSCCENTURY THERAPEUTICS INC0.18%8,695,652HELD
EVMNEVOMMUNE INC0.17%1,502,235HELD
BEAMBeam Therapeutics Inc.0.17%570,394HELD
DFTXDEFINIUM THERAPEUTICS INC0.16%400,000ADDED (+33.3%)
IDYAIDEAYA BIOSCIENCES INC0.12%370,370NEW
MISTMILESTONE PHARMACEUTICALS IN0.09%7,833,336ADDED (+23.7%)
OCGNOCUGEN INC0.09%6,666,666HELD
TENXTENAX THERAPEUTICS INC0.09%696,570ADDED (+88.1%)
HTFLHEARTFLOW INC0.07%295,000TRIMMED (-40.4%)
WVEWave Life Sciences, Inc.0.07%1,350,000HELD
LRMRLARIMAR THERAPEUTICS INC0.07%2,565,999ADDED (+71.1%)
LMRILUMEXA IMAGING HOLDINGS INC0.06%650,000HELD
ALLOALLOGENE THERAPEUTICS INC0.06%3,250,000NEW
CBIOCRESCENT BIOPHARMA, INC.0.06%372,856HELD
FDMT4D Molecular Therapeutics, Inc.0.05%475,737HELD
MAZEMAZE THERAPEUTICS INC0.05%212,000NEW
CAPRCAPRICOR THERAPEUTICS INC0.05%250,000HELD
KLRSKALARIS THERAPEUTICS INC0.05%1,300,000HELD
ABVXAbivax S.A.0.03%26,400NEW
AVTXAVALO THERAPEUTICS INC0.03%175,000TRIMMED (-79.6%)
MDLNMedline Inc.0.02%70,000HELD
IRONDISC MEDICINE INC0.02%30,000HELD
IMAIMAGENEBIO INC0.02%334,445HELD
XGNEXAGEN INC.0.01%195,000TRIMMED (-50.7%)
RCKTROCKET PHARMACEUTICALS, INC.<0.01%350,000HELD

Exited this quarter: ARWR, CMPX, FLGT, ISRG, IVA, JBIO, OMDA, SYK, WAY.

Source: SEC Form 13F filing for the quarter ended Jun 30, 2026, filed Aug 14, 2026. CIK 0001493215. Change labels compare with the fund’s previous quarterly filing. 13F filings cover long positions only.

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