Stocks/Funds/CIK 1493215

RTW INVESTMENTS, LP

long-term holder
Quarterly 13F filings · Latest period 2026-03-31 · CIK 1493215
Assets
$9.26B
+46.8% YoY
Holdings
87
Lifetime alpha vs market
-8.60% annual
Average hold time
2.4 yr
median 1.3 yr

Quarterly history

Cum return +12% vs S&P +76% · α -64% lifetimeAUM $9.3B · peak $9.3BFlow $503M (+6%)2016-062017-122019-062020-122022-062023-122025-062026-03
AUM ($B)fundS&P 500(gap = α)/ Flow in/out

Behavior signals (lifetime)

Dip response
-0.43%
trims when stocks drop
when a holding falls −10%+
Middle response
-1.86%
baseline attrition
Rally response
+2.78%
adds into rallies
when a holding rises +10%+

Top positions · 30

Ticker$ value% portYoYHold time
MDGLMadrigal Pharmaceuticals$1.04B11.3%+58.0%3.0 yr
PTGXProtagonist Therapeutics$533M5.8%+117.9%6.8 yr
PTCTPTC Therapeutics, Inc.$528M5.7%+33.7%9.5 yr
ARGXargenx SE$518M5.6%+23.4%9.0 yr
CGONCG Oncology, Inc. Common$473M5.1%+176.4%2.3 yr
CELCCelcuity Inc.$347M3.7%+1029.0%0.5 yr
TNGXTango Therapeutics, Inc.$278M3.0%+1427.0%1.3 yr
ERASErasca, Inc.$261M2.8%+1081.0%0.5 yr
NTRANatera, Inc.$250M2.7%+41.4%8.5 yr
RDNTRadNet, Inc.$239M2.6%+12.4%2.5 yr
TARSTarsus Pharmaceuticals, $235M2.5%+36.6%5.5 yr
$234M2.5%2.8 yr
SYRESpyre Therapeutics, Inc.$210M2.3%+212.5%2.5 yr
COGTCogent Biosciences, Inc.$210M2.3%+542.6%0.8 yr
IRTCiRhythm Technologies, In$197M2.1%+12.7%0.5 yr

Portfolio composition (YoY)

Industry mix
Biotechnology79.6%+5.7pp$7.37B
Medical - Diagnostics & Research7.7%-0.3pp$716M
Medical - Devices5.3%-8.6pp$488M
Unknown3.0%+0.9pp$275M
Medical - Instruments & Supplies1.6%+1.5pp$145M
Medical - Healthcare Information Services1.0%-0.0pp$89M
Medical - Care Facilities0.6%+0.4pp$59M
Information Technology Services0.4%$39M
Drug Manufacturers - Specialty & Generic0.3%$31M
Medical - Pharmaceuticals0.3%+0.1pp$24M
Country
US81.7%+7.7pp
NL6.1%-3.8pp
GB3.1%-2.3pp
Unknown3.0%+0.9pp
CR1.6%-0.0pp
IE1.5%-3.0pp
DE1.4%+0.9pp
CN1.3%-0.5pp
Top 5: 33.4% · Top 10: 48.3% · Top 25: 76.4%

Winners

TickerPrev $PnLYoY %
MDGL$660M+0.38B58.0%
PTGX$277M+0.33B117.9%
NTRA$367M+0.15B41.4%
STOK$34M+0.13B389.6%
PTCT$381M+0.13B33.7%

Losers

TickerPrev $PnLYoY %
ZLAB$113M-0.05B-48.0%
ISRG$100M-0.01B-6.9%

Top buys this quarter · 15

CGON CG Oncology, Inc. Common stock+$337M
CELC Celcuity Inc.+$284M
ERAS Erasca, Inc.+$259M
TNGX Tango Therapeutics, Inc.+$247M
HNGE Hinge Health, Inc.+$61M
IRTC iRhythm Technologies, Inc.+$197M
ISRG Intuitive Surgical, Inc.+$55M
WAY Waystar Holding Corp.new+$39M
CADL Candel Therapeutics, Inc.new+$31M
AKTS Aktis Oncology, Inc.new+$28M

Top sells this quarter · 15

PEN Penumbra, Inc.exit$285M
APLS Apellis Pharmaceuticals, Inc.$160M
AXSM Axsome Therapeutics, Inc.exit$150M
MASI Masimo Corporationexit$122M
COGT Cogent Biosciences, Inc.$82M
PODD Insulet Corporationexit$68M
NTRA Natera, Inc.$50M
SYK Stryker Corporation$48M
DNTH Dianthus Therapeutics, Inc.$15M
QURE uniQure N.V.$18M

Quarterly history (TTM returns)

PeriodAUM# PosReturn (1yr)SPY (1yr)Alpha (1yr)Flow
2026-03-31$9.26B87+42.78%+17.59%+25.19%+0.50B
2025-12-31$9.14B90+43.42%+17.72%+25.70%-0.07B
2025-09-30$7.67B73+21.41%+17.52%+3.90%-0.67B
2025-06-30$6.71B72+0.50%+14.94%-14.44%+0.41B
2025-03-31$6.31B67-11.78%+8.30%-20.08%+0.15B
2024-12-31$6.40B71-7.43%+24.89%-32.31%-0.38B
2024-09-30$6.67B67+8.32%+36.04%-27.72%+0.27B
2024-06-30$6.22B67-11.98%+24.49%-36.47%+0.32B
2024-03-31$6.72B68-1.03%+29.62%-30.65%+0.32B
2023-12-31$6.34B63-6.73%+26.18%-32.91%+0.76B
2023-09-30$4.69B66-24.18%+21.57%-45.75%+0.32B
2023-06-30$5.23B61-2.19%+19.42%-21.61%+0.50B
2023-03-31$4.80B60-23.96%-7.82%-16.14%+0.14B
2022-12-31$4.90B77-21.92%-18.17%-3.75%+0.70B
2022-09-30$4.34B86-10.34%-15.51%+5.17%+0.18B
2022-06-30$3.85B105-16.43%-10.62%-5.81%+0.16B