Stocks/Funds/CIK 1583977

Cormorant Asset Management, LLC

long-term holder
Quarterly 13F filings · Latest period 2026-03-31 · CIK 1583977
Assets
$1.95B
+52.5% YoY
Holdings
45
Lifetime alpha vs market
-9.14% annual
Average hold time
2.3 yr
median 2.0 yr

Quarterly history

Cum return +4% vs S&P +52% · α -48% lifetimeAUM $2.0B · peak $3.5BFlow $-47M (-3%)2016-062017-122019-062020-122022-062023-122025-062026-03
AUM ($B)fundS&P 500(gap = α)/ Flow in/out

Behavior signals (lifetime)

Dip response
-6.31%
trims when stocks drop
when a holding falls −10%+
Middle response
-9.06%
baseline attrition
Rally response
-2.49%
trims into rallies
when a holding rises +10%+

Top positions · 30

Ticker$ value% portYoYHold time
$285M14.6%2.5 yr
BBOTBridgeBio Oncology Thera$160M8.2%0.8 yr
EYPTEyePoint Pharmaceuticals$107M5.5%+137.8%3.3 yr
EWTXEdgewise Therapeutics, I$103M5.3%+43.2%5.3 yr
ERASErasca, Inc.$94M4.8%+1081.0%2.5 yr
RAPPRapport Therapeutics, In$93M4.7%+212.0%2.0 yr
ALMSAlumis Inc. Common Stock$87M4.5%+258.8%2.0 yr
ABVXAbivax S.A.$85M4.3%+1681.6%2.5 yr
MLTXMoonLake Immunotherapeut$84M4.3%-52.3%4.0 yr
DNTHDianthus Therapeutics, I$80M4.1%+362.6%0.3 yr
$77M4.0%1.5 yr
BBIOBridgeBio Pharma, Inc.$63M3.2%+114.8%7.0 yr
OLMAOlema Pharmaceuticals, I$58M3.0%+296.5%3.8 yr
BIOABioAge Labs, Inc.$51M2.6%+365.2%1.8 yr
CNTACentessa Pharmaceuticals$42M2.1%+176.2%5.0 yr

Portfolio composition (YoY)

Industry mix
Biotechnology76.9%-6.8pp$1.50B
Unknown22.4%+6.1pp$438M
Shell Companies0.7%$13M
Country
US61.3%+13.0pp
Unknown22.4%+6.1pp
FR4.3%+3.3pp
CH4.3%-21.6pp
GB3.2%+0.7pp
KY1.7%
NL1.4%-2.8pp
BE1.3%
Top 5: 38.3% · Top 10: 60.2% · Top 25: 89.4%

Winners

TickerPrev $PnLYoY %
ABVX$13M+0.22B1681.6%
BBIO$69M+0.08B114.8%
RAPP$29M+0.06B212.0%
EYPT$45M+0.06B137.8%
CNTA$33M+0.06B176.2%

Losers

TickerPrev $PnLYoY %
MLTX$332M-0.17B-52.3%

Top buys this quarter · 15

DNTH Dianthus Therapeutics, Inc.new+$80M
DMRA Galecto, Inc.new+$39M
AGMB AgomAb Therapeutics N.V. Amerinew+$26M
MAZE Maze Therapeutics, Inc.new+$22M
ROIV Roivant Sciences Ltd.new+$21M
ANL Adlai Nortye Ltd.new+$20M
OLMA Olema Pharmaceuticals, Inc.+$58M
BIOA BioAge Labs, Inc.+$15M
HLXC Helix Acquisition Corp. III Clnew+$13M
SNSE Sensei Biotherapeutics, Inc.new+$10M

Top sells this quarter · 15

ERAS Erasca, Inc.$21M
ABVX Abivax S.A.$66M
TNGX Tango Therapeutics, Inc.$16M
GPCR Structure Therapeutics Inc.$42M
GLUE Monte Rosa Therapeutics, Inc.$41M
BBIO BridgeBio Pharma, Inc.$26M
GHRS GH Research PLCexit$18M
CNTA Centessa Pharmaceuticals plc$33M
JANX Janux Therapeutics, Inc.exit$9M
AXSM Axsome Therapeutics, Inc.$4M

Quarterly history (TTM returns)

PeriodAUM# PosReturn (1yr)SPY (1yr)Alpha (1yr)Flow
2026-03-31$1.95B45+67.97%+17.59%+50.38%-0.05B
2025-12-31$1.72B31+4.86%+17.72%-12.85%-0.07B
2025-09-30$1.39B35-23.39%+17.52%-40.90%+0.04B
2025-06-30$1.29B41-20.63%+14.94%-35.57%-0.08B
2025-03-31$1.28B41-39.52%+8.30%-47.82%-0.01B
2024-12-31$1.78B47-16.78%+24.89%-41.66%+0.03B
2024-09-30$1.85B44+4.27%+36.04%-31.77%+0.04B
2024-06-30$1.67B46-3.15%+24.49%-27.64%-0.16B
2024-03-31$2.25B55+39.47%+29.62%+9.85%+0.18B
2023-12-31$2.07B46+51.62%+26.18%+25.44%+0.06B
2023-09-30$1.70B48+8.26%+21.57%-13.31%-0.07B
2023-06-30$1.76B61+14.52%+19.42%-4.90%-0.03B
2023-03-31$1.52B72-26.80%-7.82%-18.98%-0.10B
2022-12-31$1.49B72-15.67%+7.56%-23.23%+0.29B
2022-09-30$1.42B72+6.41%-4.93%+11.34%+0.05B
2022-06-30$1.29B79-25.02%-16.11%-8.91%+0.31B