Stocks/Funds/CIK 1009258

DEERFIELD MANAGEMENT COMPANY, L.P. (SERIES C)

long-term holder
Quarterly 13F filings · Latest period 2026-03-31 · CIK 1009258
Assets
$7.18B
+63.6% YoY
Holdings
73
Lifetime alpha vs market
-3.29% annual
Average hold time
2.7 yr
median 2.0 yr

Quarterly history

Cum return +33% vs S&P +52% · α -19% lifetimeAUM $7.2B · peak $7.2BFlow $192M (+3%)2016-032017-092019-062020-122022-062023-122025-062026-03
AUM ($B)fundS&P 500(gap = α)/ Flow in/out

Behavior signals (lifetime)

Dip response
-0.05%
trims when stocks drop
when a holding falls −10%+
Middle response
+0.56%
steady accumulation
Rally response
-6.52%
trims into rallies
when a holding rises +10%+

Top positions · 30

Ticker$ value% portYoYHold time
NUVLNuvalent, Inc.$1.77B24.6%+44.5%4.8 yr
COGTCogent Biosciences, Inc.$348M4.9%+542.6%5.5 yr
$310M4.3%1.3 yr
VTRSViatris Inc.$273M3.8%+62.4%5.5 yr
UTHRUnited Therapeutics Corp$271M3.8%+92.4%1.3 yr
RVMDRevolution Medicines, In$223M3.1%+175.0%6.3 yr
CELCCelcuity Inc.$196M2.7%+1029.0%0.8 yr
CNCCentene Corporation$194M2.7%-46.1%9.3 yr
LRMRLarimar Therapeutics, In$160M2.2%+109.3%6.0 yr
BKDBrookdale Senior Living $159M2.2%+118.5%7.8 yr
VERAVera Therapeutics, Inc.$150M2.1%+67.5%2.0 yr
IONSIonis Pharmaceuticals, I$149M2.1%+148.9%1.0 yr
BCRXBioCryst Pharmaceuticals$143M2.0%+26.9%8.8 yr
INSPInspire Medical Systems,$139M1.9%-67.6%2.0 yr
LEGNLegend Biotech Corporati$139M1.9%-46.7%1.5 yr

Portfolio composition (YoY)

Industry mix
Biotechnology71.3%+10.5pp$5.12B
Unknown6.8%+2.0pp$488M
Drug Manufacturers - Specialty & Generic6.3%-1.3pp$453M
Medical - Care Facilities4.8%+1.1pp$342M
Medical - Devices4.7%-1.8pp$340M
Medical - Healthcare Plans2.7%-6.5pp$194M
Drug Manufacturers - General1.2%-0.7pp$85M
Medical - Equipment & Services1.0%-0.4pp$69M
Medical - Healthcare Information Services0.6%-0.9pp$45M
Medical - Diagnostics & Research0.5%+0.5pp$38M
Country
US89.7%-0.2pp
Unknown6.8%+2.0pp
CA1.3%
NL1.2%-2.5pp
DK0.9%
Top 5: 41.4% · Top 10: 54.4% · Top 25: 78.7%

Winners

TickerPrev $PnLYoY %
NUVL$1.28B+0.57B44.5%
RVMD$117M+0.21B175.0%
VTRS$209M+0.12B62.4%
BKD$98M+0.12B118.5%
COGT$16M+0.09B542.6%

Losers

TickerPrev $PnLYoY %
CNC$162M-0.07B-46.1%
LEGN$59M-0.03B-46.7%

Top buys this quarter · 15

INDV Indivior Pharmaceuticals Incnew+$94M
DNTH Dianthus Therapeutics, Inc.new+$86M
GMAB Genmab A/Snew+$66M
XENE Xenon Pharmaceuticals Inc.+$62M
SNDX Syndax Pharmaceuticals, Inc.+$62M
INSP Inspire Medical Systems, Inc.+$62M
BMRN BioMarin Pharmaceutical Inc.+$48M
LEGN Legend Biotech Corporation+$32M
TNGX Tango Therapeutics, Inc.+$26M
LRMR Larimar Therapeutics, Inc.+$23M

Top sells this quarter · 15

NBIX Neurocrine Biosciences, Inc.$76M
RVMD Revolution Medicines, Inc.$58M
SYRE Spyre Therapeutics, Inc.exit$36M
VTR Ventas, Inc.exit$29M
EWTX Edgewise Therapeutics, Inc.exit$24M
CPRX Catalyst Pharmaceuticals, Inc.$24M
IDYA IDEAYA Biosciences, Inc.$21M
CNC Centene Corporation$17M
PHR Phreesia, Inc.exit$17M
ARWR Arrowhead Pharmaceuticals, Inc$16M

Quarterly history (TTM returns)

PeriodAUM# PosReturn (1yr)SPY (1yr)Alpha (1yr)Flow
2026-03-31$7.18B73+42.65%+17.59%+25.06%+0.19B
2025-12-31$6.84B140+26.40%+17.72%+8.69%-0.36B
2025-09-30$5.96B142-11.93%+17.52%-29.44%+0.65B
2025-06-30$4.86B115-4.26%+14.94%-19.20%+0.22B
2025-03-31$4.39B114-17.09%+8.30%-25.39%+0.17B
2024-12-31$4.66B99+5.04%+24.89%-19.85%-0.42B
2024-09-30$6.04B435+63.37%+36.04%+27.34%-0.12B
2024-06-30$5.18B423+34.69%+24.49%+10.20%+0.40B
2024-03-31$5.21B361+70.72%+29.62%+41.10%+0.33B
2023-12-31$4.26B215+22.01%+26.18%-4.17%+0.22B
2023-09-30$3.09B75-1.91%+21.57%-23.48%-0.04B
2023-06-30$3.19B84+6.30%+19.42%-13.12%-0.10B
2023-03-31$2.84B85-34.07%-7.82%-26.25%+0.60B
2022-12-31$2.73B79+5.29%+7.56%-2.27%-0.23B
2022-09-30$2.81B99+6.22%-4.93%+11.15%+0.08B
2022-06-30$2.57B93-28.00%-16.11%-11.89%+0.74B