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Deerfield Management Company, L.P.

← All funds

13F holdings as of 2025-03-31 · vs 2024-12-31 · long US-listed positions only

2026-03-312025-12-312025-09-302025-06-302025-03-312024-12-312024-09-302024-06-30
Reported 13F value
$5.04B
Positions
122
New this quarter
47
Exited this quarter
30
Top-10 concentration
53%
Options (notional)0 calls · $01 puts · $20.4M
#HoldingSharesValue% of 13FQoQ Δ
1NUVLNUVALENT INC18.0M$1.28B25.3%-$132.4M
2VTRSVIATRIS INCTRIM24.0M$209.0M4.1%-$89.8M
3457985AM1174.4M$171.0M3.4%+$2.8M
4NBIXNEUROCRINE BIOSCIENCES INCADD1.5M$164.7M3.3%+$47.0M
5CNCCENTENE CORP DEL2.7M$162.2M3.2%+$347K
6OSCROSCAR HEALTH INCADD11.8M$155.2M3.1%-$3.8M
7N5749R100ADD3.2M$133.6M2.6%+$8.6M
8SPRYARS PHARMACEUTICALS INC10.5M$132.3M2.6%+$21.3M
900437EAB8132.6M$130.6M2.6%+$6.2M
10ALNY 1 09/15/27ALNYLAM PHARMACEUTICALS INC110.0M$126.9M2.5%+$9.6M
11RVMDREVOLUTION MEDICINES INCADD3.3M$117.3M2.3%-$25.2M
12MIRM 4 05/01/29MIRUM PHARMACEUTICALS INC70.0M$114.5M2.3%+$7.9M
13AHCOADAPTHEALTH CORP9.7M$105.3M2.1%+$12.8M
14INDIVIOR PLCADD10.6M$100.7M2.0%-$9.7M
15BKDBROOKDALE SR LIVING INC15.6M$97.7M1.9%+$19.2M
16ALHCALIGNMENT HEALTHCARE INCTRIM4.6M$85.0M1.7%+$2.9M
17UTHRUNITED THERAPEUTICS CORP DELNEW275K$84.8M1.7%new
18PFEPFIZER INCNEW3.3M$84.8M1.7%new
19NEWAMSTERDAM PHARMA COMPANYTRIM4.1M$84.0M1.7%-$26.9M
20CPRXCATALYST PHARMACEUTICALS INCADD3.4M$83.0M1.6%+$17.6M
21DVAXDYNAVAX TECHNOLOGIES CORPTRIM5.2M$67.3M1.3%+$1.0M
22BAXBAXTER INTL INC1.9M$65.8M1.3%+$9.8M
23LEGNLEGEND BIOTECH CORPADD1.7M$59.2M1.2%+$8.7M
24BIOBIO RAD LABS INCADD226K$55.1M1.1%+$5.2M
25IDYAIDEAYA BIOSCIENCES INCADD3.3M$53.5M1.1%-$16.8M
26EWTXEDGEWISE THERAPEUTICS INC2.1M$45.7M0.9%-$9.8M
27LRMRLARIMAR THERAPEUTICS INC21.2M$45.6M0.9%-$36.5M
28EHABUSDENHABIT INCTRIM5.0M$43.9M0.9%+$4.8M
29ALNYALNYLAM PHARMACEUTICALS INCTRIM145K$39.2M0.8%+$5.0M
30BCRXBIOCRYST PHARMACEUTICALS INCTRIM5.2M$38.9M0.8%-$22.3M
31IRONDISC MEDICINE INCADD782K$38.8M0.8%+$762K
32CNMDCONMED CORPTRIM611K$36.9M0.7%-$5.0M
33LNTH 2.625 12/15/27LANTHEUS HLDGS INC25.3M$35.6M0.7%+$1.9M
34NVSTENVISTA HOLDINGS CORPORATIONADD2.0M$35.0M0.7%+$15.3M
35INSMINSMED INCNEW458K$34.9M0.7%new
36EMBCEMBECTA CORPTRIM2.7M$34.7M0.7%-$32.8M
3716934W1063.8M$32.1M0.6%+$19.0M
38PHARVARIS N V2.0M$31.7M0.6%-$7.0M
39CGEMCULLINAN THERAPEUTICS INCADD3.9M$29.2M0.6%-$11.9M
40INMODE LTD1.6M$28.0M0.6%+$1.6M
41PHRPHREESIA INCTRIM1.0M$25.8M0.5%-$6.2M
42VERAVERA THERAPEUTICS INCNEW1.1M$25.2M0.5%new
43IMCR 2.5 02/01/30IMMUNOCORE HLDGS PLCNEW30.0M$25.2M0.5%new
44LQDALIQUIDIA CORPORATIONNEW1.6M$23.8M0.5%new
45DAWNGBXDAY ONE BIOPHARMACEUTICALS IADD3.0M$23.5M0.5%-$9.4M
46PRAXPRAXIS PRECISION MEDICINES INEW620K$23.5M0.5%new
47LNTHLANTHEUS HLDGS INC240K$23.4M0.5%+$2.0M
48SVRASAVARA INC8.0M$22.1M0.4%-$2.4M
49CGONCG ONCOLOGY INCTRIM851K$20.8M0.4%-$3.6M
50CERTCERTARA INCNEW2.0M$20.0M0.4%new
51XERS 8 07/15/28XERIS BIOPHARMA HOLDINGS INCNEW10.5M$19.9M0.4%new
52IARTINTEGRA LIFESCIENCES HLDGS CNEW795K$17.5M0.3%new
53BEAMBEAM THERAPEUTICS INCNEW878K$17.1M0.3%new
54KYMRKYMERA THERAPEUTICS INC593K$16.2M0.3%-$7.6M
55COGTCOGENT BIOSCIENCES INCADD2.6M$15.8M0.3%-$4.7M
56MREOMEREO BIOPHARMA GROUP PLC6.7M$15.1M0.3%-$8.4M
57CONCONCENTRA GROUP HOLDINGS PAR650K$14.1M0.3%+$1.2M
5859267L107NEW500K$13.6M0.3%new
59DCGODOCGO INCTRIM5.1M$13.3M0.3%-$17.2M
60TXG10X GENOMICS INCADD1.5M$13.1M0.3%-$8.4M
61LUNGPULMONX CORPADD1.9M$12.7M0.3%+$2.3M
62BBNXBETA BIONICS INCNEW1.0M$12.4M0.2%new
63ZBIOZENAS BIOPHARMA INC1.6M$12.3M0.2%-$453K
64FHTXFOGHORN THERAPEUTICS INC3.3M$11.9M0.2%-$3.5M
65NOVOCURE LTDNEW650K$11.6M0.2%new
66OPKOPKO HEALTH INCNEW6.9M$11.5M0.2%new
67DCTHDELCATH SYS INCNEW813K$10.4M0.2%new
68GH RESEARCH PLCNEW925K$10.2M0.2%new
69RXSTRXSIGHT INCNEW392K$9.9M0.2%new
70SLPSIMULATIONS PLUS INCNEW354K$8.7M0.2%new
71DYNDYNE THERAPEUTICS INCADD812K$8.5M0.2%-$1.8M
72PCVXVAXCYTE INC225K$8.5M0.2%-$9.9M
73SIONSIONNA THERAPEUTICS INCNEW747K$7.8M0.2%new
74SYRESPYRE THERAPEUTICS INC450K$7.3M0.1%-$3.2M
75GPCRSTRUCTURE THERAPEUTICS INC373K$6.5M0.1%-$3.7M
76NPCENEUROPACE INCNEW500K$6.1M0.1%new
77CATXPERSPECTIVE THERAPEUTICS INCTRIM2.8M$6.0M0.1%-$3.3M
78NGNENEUROGENE INCTRIM447K$5.2M0.1%-$5.0M
79TOITHE ONCOLOGY INSTITUTE INC3.4M$3.8M0.1%+$2.8M
8043157M1021.9M$2.7M0.1%-$1.2M
81CALCCALCIMEDICA INC1.3M$2.5M0.0%-$2.1M
8209090D301ADD2.5M$1.4M0.0%+$81K
83ALECALECTOR INCTRIM1.1M$1.3M0.0%-$719K
84ANNXANNEXON INC584K$1.1M0.0%-$1.9M
85TWSTTWIST BIOSCIENCE CORP24K$935K0.0%-$172K
86NEWAMSTERDAM PHARMA COMPANY93K$834K0.0%-$488K
87HUMHUMANA INC917$243K0.0%+$10K
88JOEST JOE CONEW4K$210K0.0%new
89DXCDXC TECHNOLOGY CONEW12K$203K0.0%new
90XPOFXPONENTIAL FITNESS INCNEW23K$192K0.0%new
91FPIFARMLAND PARTNERS INCNEW17K$188K0.0%new
92HNRGHALLADOR ENERGY COMPANYNEW14K$168K0.0%new
93REIRING ENERGY INCNEW127K$146K0.0%new
94QSIAWQUANTUM SI INC333K$133K0.0%-$283K
95MFAMFA FINL INCNEW11K$112K0.0%new
96WOOFPETCO HEALTH & WELLNESS CO INEW35K$108K0.0%new
97BLZEBACKBLAZE INCNEW21K$104K0.0%new
98VIRVIR BIOTECHNOLOGY INCNEW16K$102K0.0%new
99MAXMEDIAALPHA INCNEW11K$100K0.0%new
100MNKDMANNKIND CORPNEW17K$87K0.0%new

Showing the top 100 of 122 positions by value.

Source: SEC Form 13F. Values are as-of 2025-03-31 (quarter-end), not live. Percentages are of reported 13F value, not the fund’s full AUM (13F excludes shorts, cash, bonds, most non-US holdings).