DEERFIELD MANAGEMENT COMPANY, L.P. Quant / Systematic

Location: New York, NY

CIK: 0001009258 · Show all filings

Period: Q1 2026 (← Previous)

Filing Date: May 15, 2026

Total Value: $8.476B (84.7% shares, 15.3% debt)

Holdings (82)

New Positions (12)

Increased Positions (14)

XENE XENON PHARMACEUTICALS INC 1.1%
Value $93.95M (+286.7%) Shares 1,615,696 (+198.1%) Est. Cost $38.84 Unrealized +8.1%
UTHR UNITED THERAPEUTICS CORP DEL 3.2%
Value $271M (+30.6%) Shares 457,000 (+7.3%) Est. Cost $331.98 Unrealized +44.7%
TNGX TANGO THERAPEUTICS INC 1.0%
Value $86.75M (+236.8%) Shares 4,146,813 (+42.7%) Est. Cost $9.60 Unrealized +24.0%
PRAX PRAXIS PRECISION MEDICINES I 3.7%
Value $310M (+16.6%) Shares 963,351 (+6.6%) Est. Cost $82.09 Unrealized +279.9%
LRMR LARIMAR THERAPEUTICS INC 1.9%
Value $160M (+37.4%) Shares 35,606,974 (+16.3%) Est. Cost $5.09 Unrealized -32.1%
BCRX BIOCRYST PHARMACEUTICALS INC 1.7%
Value $143M (+28.0%) Shares 15,038,000 (+4.9%) Est. Cost $7.58 Unrealized -7.7%
BBNX BETA BIONICS INC 0.2%
Value $13.27M (-53.6%) Shares 1,324,000 (+41.1%) Est. Cost $17.78 Unrealized -3.8%
BLTE BELITE BIO INC 0.6%
Value $48.47M (+29.6%) Shares 304,013 (+30.0%) Est. Cost $159.84 Unrealized
LEGN LEGEND BIOTECH CORP 1.6%
Value $139M (+7.8%) Shares 7,687,638 (+29.6%) Est. Cost $25.57 Unrealized
NAMS NEWAMSTERDAM PHARMA COMPANY 1.6%
Value $137M (-6.6%) Shares 4,264,789 (+2.4%) Est. Cost $20.77 Unrealized +62.4%
MNPR MONOPAR THERAPEUTICS INC 0.2%
Value $17.74M (+59.3%) Shares 323,745 (+89.8%) Est. Cost $54.49 Unrealized +15.2%
IRON DISC MEDICINE INC 0.5%
Value $42.01M (+3.5%) Shares 657,000 (+28.5%) Est. Cost $51.41 Unrealized +44.0%
FHTX FOGHORN THERAPEUTICS INC 0.2%
Value $21.01M (+6.6%) Shares 4,394,367 (+20.4%) Est. Cost $6.00 Unrealized -5.2%
INSP INSPIRE MED SYS INC 1.6%
Value $139M (+0.4%) Shares 2,703,238 (+79.5%) Est. Cost $92.02 Unrealized -15.9%

Exited Positions (80)

INDIVIOR PLC 1.4%
Value $122M Shares 3,393,063 Est. Cost $10.68 Unrealized
PHR PHREESIA INC 0.4%
Value $33.82M Shares 1,999,045 Est. Cost $21.65 Unrealized -34.1%
MRNA MODERNA INC 0.3%
Value $29.49M Shares 1,000,000 Est. Cost Unrealized
LANTHEUS HLDGS INC 0.3%
Value $28.91M Shares 25,255,000 Est. Cost $1.11 Unrealized
VTR VENTAS INC 0.3%
Value $27.39M Shares 354,000 Est. Cost $63.96 Unrealized +20.9%
SYRE SPYRE THERAPEUTICS INC 0.3%
Value $23.28M Shares 710,626 Est. Cost $25.54 Unrealized +35.2%
EWTX EDGEWISE THERAPEUTICS INC 0.2%
Value $19M Shares 765,694 Est. Cost $32.34 Unrealized -12.9%
CRMD CORMEDIX INC 0.2%
Value $12.89M Shares 1,107,944 Est. Cost $12.09 Unrealized -35.0%
MDLN MEDLINE INC 0.1%
Value $10.92M Shares 260,000 Est. Cost $42.23 Unrealized +6.2%
OMDA OMADA HEALTH INC 0.1%
Value $8.728M Shares 553,107 Est. Cost $17.31 Unrealized -19.3%
CALC CALCIMEDICA INC 0.1%
Value $8.567M Shares 1,300,000 Est. Cost $4.31 Unrealized -33.7%
PBH PRESTIGE CONSMR HEALTHCARE I 0.1%
Value $4.298M Shares 69,669 Est. Cost $69.00 Unrealized -4.7%
VEEV VEEVA SYS INC 0.0%
Value $3.954M Shares 17,711 Est. Cost $265.35 Unrealized -23.1%
RDNT RADNET INC 0.0%
Value $3.564M Shares 49,951 Est. Cost $67.10 Unrealized +6.6%
LH LABCORP HOLDINGS INC 0.0%
Value $3.468M Shares 13,825 Est. Cost $265.26 Unrealized +2.2%
ENOV ENOVIS CORPORATION 0.0%
Value $3.39M Shares 127,270 Est. Cost $30.19 Unrealized -21.7%
ALHC ALIGNMENT HEALTHCARE INC 0.0%
Value $3.246M Shares 164,345 Est. Cost $10.77 Unrealized +99.2%
DGX QUEST DIAGNOSTICS INC 0.0%
Value $3.192M Shares 18,392 Est. Cost $182.07 Unrealized +4.7%
TMDX TRANSMEDICS GROUP INC 0.0%
Value $3.101M Shares 25,492 Est. Cost $121.27 Unrealized +11.6%
PODD INSULET CORP 0.0%
Value $3.017M Shares 10,616 Est. Cost $312.94 Unrealized -15.5%
BLFS BIOLIFE SOLUTIONS INC 0.0%
Value $2.907M Shares 120,211 Est. Cost $23.77 Unrealized -0.8%
CHE CHEMED CORP NEW 0.0%
Value $2.659M Shares 6,215 Est. Cost $447.75 Unrealized +0.7%
WOOF PETCO HEALTH & WELLNESS CO I 0.0%
Value $2.631M Shares 936,309 Est. Cost $3.24 Unrealized -15.2%
KIDS ORTHOPEDIATRICS CORP 0.0%
Value $2.561M Shares 144,220 Est. Cost $20.68 Unrealized -14.9%
CI THE CIGNA GROUP 0.0%
Value $2.533M Shares 9,203 Est. Cost $279.23 Unrealized +0.5%
TRUP TRUPANION INC 0.0%
Value $2.483M Shares 66,438 Est. Cost $46.36 Unrealized -30.7%
RMD RESMED INC 0.0%
Value $2.434M Shares 10,104 Est. Cost $255.44 Unrealized +0.2%
BSX BOSTON SCIENTIFIC CORP 0.0%
Value $2.378M Shares 24,941 Est. Cost $103.56 Unrealized -17.1%
DVA DAVITA INC 0.0%
Value $2.375M Shares 20,909 Est. Cost $135.99 Unrealized -7.7%
DOCS DOXIMITY INC 0.0%
Value $2.3M Shares 51,942 Est. Cost $56.14 Unrealized -37.7%
DXCM DEXCOM INC 0.0%
Value $2.186M Shares 32,943 Est. Cost $74.45 Unrealized -4.7%
IRTC IRHYTHM TECHNOLOGIES INC 0.0%
Value $2.147M Shares 12,099 Est. Cost $158.94 Unrealized -0.2%
CNMD CONMED CORP 0.0%
Value $2.134M Shares 52,555 Est. Cost $74.81 Unrealized -43.9%
MASI MASIMO CORP 0.0%
Value $2.1M Shares 16,147 Est. Cost $143.19 Unrealized +1.4%
LMAT LEMAITRE VASCULAR INC 0.0%
Value $2.094M Shares 25,815 Est. Cost $88.18 Unrealized -1.2%
TXG 10X GENOMICS INC 0.0%
Value $2.064M Shares 126,574 Est. Cost $13.46 Unrealized +47.4%
ATRC ATRICURE INC 0.0%
Value $2.06M Shares 52,076 Est. Cost $34.21 Unrealized +7.9%
AVNS AVANOS MED INC 0.0%
Value $1.876M Shares 167,061 Est. Cost $11.64 Unrealized +14.8%
CRVL CORVEL CORP 0.0%
Value $1.87M Shares 27,629 Est. Cost $90.58 Unrealized -33.6%
CAH CARDINAL HEALTH INC 0.0%
Value $1.846M Shares 8,985 Est. Cost $187.72 Unrealized +14.7%
GDRX GOODRX HLDGS INC 0.0%
Value $1.789M Shares 660,133 Est. Cost $3.28 Unrealized -24.7%
SGRY SURGERY PARTNERS INC 0.0%
Value $1.74M Shares 112,623 Est. Cost $18.38 Unrealized -17.0%
ALGN ALIGN TECHNOLOGY INC 0.0%
Value $1.718M Shares 11,000 Est. Cost $157.82 Unrealized +10.7%
ADUS ADDUS HOMECARE CORP 0.0%
Value $1.704M Shares 15,871 Est. Cost $114.84 Unrealized -4.8%
MMSI MERIT MED SYS INC 0.0%
Value $1.657M Shares 18,798 Est. Cost $87.09 Unrealized -5.0%
NHC NATIONAL HEALTHCARE CORP 0.0%
Value $1.657M Shares 12,085 Est. Cost $106.28 Unrealized +39.0%
EHC ENCOMPASS HEALTH CORP 0.0%
Value $1.62M Shares 15,259 Est. Cost $115.70 Unrealized -11.0%
VREX VAREX IMAGING CORP 0.0%
Value $1.535M Shares 131,745 Est. Cost $9.91 Unrealized +37.3%
HQY HEALTHEQUITY INC 0.0%
Value $1.487M Shares 16,231 Est. Cost $95.03 Unrealized -12.5%
ABT ABBOTT LABS 0.0%
Value $1.434M Shares 11,449 Est. Cost $127.30 Unrealized -9.3%
MMS MAXIMUS INC 0.0%
Value $1.433M Shares 16,606 Est. Cost $85.48 Unrealized +1.8%
SYK STRYKER CORPORATION 0.0%
Value $1.248M Shares 3,551 Est. Cost $375.25 Unrealized -2.8%
ATEC ALPHATEC HLDGS INC 0.0%
Value $1.205M Shares 57,277 Est. Cost $13.28 Unrealized +20.1%
STAA STAAR SURGICAL CO 0.0%
Value $1.198M Shares 51,894 Est. Cost $23.84 Unrealized -18.4%
UFPT UFP TECHNOLOGIES INC 0.0%
Value $1.132M Shares 5,098 Est. Cost $220.35 Unrealized +14.0%
KVUE KENVUE INC 0.0%
Value $1.127M Shares 65,344 Est. Cost $20.06 Unrealized -12.0%
MDXG MIMEDX GROUP INC 0.0%
Value $1.086M Shares 160,419 Est. Cost $6.90 Unrealized -20.9%
ITGR INTEGER HLDGS CORP 0.0%
Value $1.045M Shares 13,326 Est. Cost $107.05 Unrealized -20.6%
RVTY REVVITY INC 0.0%
Value $999K Shares 10,323 Est. Cost $90.71 Unrealized +15.6%
AZTA AZENTA INC 0.0%
Value $859K Shares 25,835 Est. Cost $31.00 Unrealized +11.6%
ARVN ARVINAS INC 0.0%
Value $807K Shares 68,057 Est. Cost $10.92 Unrealized +15.1%
ZTS ZOETIS INC 0.0%
Value $717K Shares 5,698 Est. Cost $151.58 Unrealized -16.9%
COO COOPER COS INC 0.0%
Value $638K Shares 7,786 Est. Cost $71.67 Unrealized +14.6%
SDGR SCHRODINGER INC 0.0%
Value $608K Shares 33,987 Est. Cost $18.96 Unrealized -21.9%
TNDM TANDEM DIABETES CARE INC 0.0%
Value $573K Shares 26,090 Est. Cost $15.94 Unrealized +32.2%
RXST RXSIGHT INC 0.0%
Value $545K Shares 52,257 Est. Cost $10.03 Unrealized -9.8%
IART INTEGRA LIFESCIENCES HLDGS C 0.0%
Value $487K Shares 39,209 Est. Cost $23.51 Unrealized -49.7%
ABBV ABBVIE INC 0.0%
Value $460K Shares 2,014 Est. Cost $227.54 Unrealized -2.2%
HROW HARROW INC 0.0%
Value $426K Shares 8,693 Est. Cost $41.98 Unrealized +14.6%
XERS XERIS BIOPHARMA HOLDINGS INC 0.0%
Value $410K Shares 52,230 Est. Cost $6.26 Unrealized +15.3%
HCSG HEALTHCARE SVCS GROUP INC 0.0%
Value $406K Shares 21,259 Est. Cost $17.99 Unrealized +9.0%
AMPH AMPHASTAR PHARMACEUTICALS IN 0.0%
Value $398K Shares 14,852 Est. Cost $25.76 Unrealized +7.0%
RGEN REPLIGEN CORP 0.0%
Value $360K Shares 2,199 Est. Cost $122.20 Unrealized +24.7%
STE STERIS PLC 0.0%
Value $343K Shares 1,352 Est. Cost $238.92 Unrealized +6.9%
BRBR BELLRING BRANDS INC 0.0%
Value $321K Shares 11,996 Est. Cost $45.18 Unrealized -50.9%
ISRG INTUITIVE SURGICAL INC 0.0%
Value $274K Shares 483 Est. Cost $479.87 Unrealized +8.6%
EYE NATIONAL VISION HLDGS INC 0.0%
Value $266K Shares 10,284 Est. Cost $26.90 Unrealized +0.9%
ABEO ABEONA THERAPEUTICS INC 0.0%
Value $211K Shares 40,000 Est. Cost $5.03 Unrealized +2.6%
NUVATION BIO INC 0.0%
Value $55,000 Shares 166,666 Est. Cost $2.67 Unrealized
BFLYW BUTTERFLY NETWORK INC 0.0%
Value $12,907 Shares 733,333 Est. Cost $6.45 Unrealized

Decreased Positions (9)

Unchanged Positions (47)

BROOKDALE SR LIVING INC 6.0%
Value $505M Shares 306,885,000 Est. Cost $1.39 Unrealized
DAWN DAY ONE BIOPHARMACEUTICALS I 0.9%
Value $79.82M Shares 3,723,131 Est. Cost $10.85 Unrealized +1.6%
ACHC ACADIA HEALTHCARE COMPANY IN 1.2%
Value $106M Shares 4,520,000 Est. Cost $19.81 Unrealized -26.6%
BKD BROOKDALE SR LIVING INC 1.9%
Value $159M Shares 11,637,032 Est. Cost $4.84 Unrealized +186.4%
NUVL NUVALENT INC 20.8%
Value $1.767B Shares 17,248,450 Est. Cost $28.98 Unrealized +257.7%
MIRUM PHARMACEUTICALS INC 2.5%
Value $209M Shares 70,000,000 Est. Cost $1.34 Unrealized
SPRY ARS PHARMACEUTICALS INC 0.7%
Value $60.26M Shares 7,503,812 Est. Cost $6.49 Unrealized +57.8%
COGT COGENT BIOSCIENCES INC 4.1%
Value $348M Shares 9,043,903 Est. Cost $10.60 Unrealized +252.4%
CELC CELCUITY INC 2.3%
Value $196M Shares 1,714,000 Est. Cost $64.15 Unrealized +67.5%
CERT CERTARA INC 0.5%
Value $44.51M Shares 7,808,605 Est. Cost $11.38 Unrealized -27.4%
EHAB ENHABIT INC 0.8%
Value $66.9M Shares 4,747,746 Est. Cost $13.99 Unrealized -21.7%
AHCO ADAPTHEALTH CORP 1.6%
Value $137M Shares 11,477,730 Est. Cost $18.37 Unrealized -44.3%
VTRS VIATRIS INC 3.2%
Value $273M Shares 20,206,170 Est. Cost $11.21 Unrealized +25.6%
BBOT BRIDGEBIO ONCOLOGY THERAPEUT 0.5%
Value $43.72M Shares 4,885,446 Est. Cost $11.58 Unrealized
GPCR STRUCTURE THERAPEUTICS INC 0.4%
Value $37.02M Shares 767,993 Est. Cost $52.86 Unrealized
IONS IONIS PHARMACEUTICALS INC 1.8%
Value $149M Shares 1,979,669 Est. Cost $48.82 Unrealized +67.6%
SVRA SAVARA INC 0.9%
Value $74.09M Shares 13,569,000 Est. Cost $4.51 Unrealized +26.2%
LNTH LANTHEUS HLDGS INC 0.7%
Value $62.8M Shares 827,999 Est. Cost $58.19 Unrealized +17.6%
VCYT VERACYTE INC 0.3%
Value $23.38M Shares 726,000 Est. Cost $28.92 Unrealized +35.9%
ALIGNMENT HEALTHCARE INC 1.0%
Value $85.86M Shares 61,000,000 Est. Cost $1.52 Unrealized
BIO BIO RAD LABS INC 0.7%
Value $63.02M Shares 226,070 Est. Cost $357.85 Unrealized -16.5%
IONIS PHARMACEUTICALS INC 1.1%
Value $90.61M Shares 60,000,000 Est. Cost $1.38 Unrealized
ALNY ALNYLAM PHARMACEUTICALS INC 0.3%
Value $22.48M Shares 67,935 Est. Cost $175.69 Unrealized +101.1%
CDNA CAREDX INC 0.4%
Value $38.04M Shares 2,191,000 Est. Cost $14.26 Unrealized +38.2%
KYMR KYMERA THERAPEUTICS INC 0.6%
Value $46.74M Shares 561,170 Est. Cost $44.18 Unrealized +75.6%
TSHA TAYSHA GENE THERAPIES INC 0.1%
Value $12.17M Shares 2,722,165 Est. Cost $2.17 Unrealized +119.1%
NEOGENOMICS INC 0.8%
Value $66.65M Shares 72,689,000 Est. Cost $0.87 Unrealized
TOI THE ONCOLOGY INSTITUTE INC 0.1%
Value $10.32M Shares 3,360,052 Est. Cost $8.88 Unrealized -65.2%
PHVS PHARVARIS N V 1.0%
Value $88.31M Shares 3,126,042 Est. Cost $21.46 Unrealized +24.6%
KYTX KYVERNA THERAPEUTICS INC 0.2%
Value $17.26M Shares 2,000,000 Est. Cost $7.42 Unrealized +11.8%
STOK STOKE THERAPEUTICS INC 0.7%
Value $59.37M Shares 1,823,500 Est. Cost $30.06 Unrealized +5.9%
CGEM CULLINAN THERAPEUTICS INC 0.1%
Value $5.487M Shares 386,169 Est. Cost $17.93 Unrealized -33.3%
SION SIONNA THERAPEUTICS INC 0.5%
Value $38.91M Shares 970,590 Est. Cost $15.59 Unrealized +151.7%
ALEC ALECTOR INC 0.0%
Value $2.269M Shares 1,055,192 Est. Cost $17.59 Unrealized -89.2%
LIVANOVA PLC 0.5%
Value $40.03M Shares 34,280,000 Est. Cost $1.03 Unrealized
ANNX ANNEXON INC 0.0%
Value $3.235M Shares 583,913 Est. Cost $23.46 Unrealized -75.5%
CMPX COMPASS THERAPEUTICS INC 0.2%
Value $19.08M Shares 3,606,000 Est. Cost $4.62 Unrealized +29.9%
NAMSW NEWAMSTERDAM PHARMA COMPANY 0.0%
Value $1.859M Shares 92,787 Est. Cost $0.87 Unrealized
PHGE BIOMX INC 0.0%
Value $493K Shares 131,272 Est. Cost $6.73 Unrealized -35.8%
TOIIW THE ONCOLOGY INSTITUTE INC 0.0%
Value $54,750 Shares 1,250,000 Est. Cost $0.69 Unrealized
HUM HUMANA INC 0.0%
Value $159K Shares 917 Est. Cost $263.59 Unrealized -15.2%
EW EDWARDS LIFESCIENCES CORP 0.0%
Value $1.097M Shares 13,702 Est. Cost $80.24 Unrealized +2.1%
IMMUNOCORE HLDGS PLC 0.3%
Value $27.03M Shares 30,000,000 Est. Cost $0.84 Unrealized
QSIAW QUANTUM SI INC 0.0%
Value $36,200 Shares 333,333 Est. Cost $3.76 Unrealized
MYGN MYRIAD GENETICS INC 0.0%
Value $2,273 Shares 505 Est. Cost $5.91 Unrealized -7.5%
SRZNW SURROZEN INC 0.0%
Value $2,667 Shares 166,666 Est. Cost $1.14 Unrealized
PMVP PMV PHARMACEUTICALS INC 0.0%
Value $10,900 Shares 8,790 Est. Cost $0.98 Unrealized +14.6%