DEERFIELD MANAGEMENT COMPANY, L.P. — 13F Holdings & Portfolio
CIK 1009258 · latest 13F-HR filed 2026-08-14
DEERFIELD MANAGEMENT COMPANY, L.P. manages $9.59B in 13F-reported U.S. long-equity assets across 82 reported positions as of its 2026-06-30 13F-HR filing. Its largest disclosed positions are NUVL (22.22%), BROOKDALE SR LIVING INC (6.11%), RVMD (4.67%). Quarter over quarter (versus its 2026-03-31 filing) the fund opened 13 new positions, exited 13, added to 39, and trimmed 18.
AUM is the long-equity portion reported on Form 13F-HR. Excludes short positions, cash, foreign holdings, and non-13F assets. For informational purposes only — not investment advice.
NEW YORK, NY 10010
$9.59B
Long-equity book
82
Distinct positions
2026-06-30
Filed 2026-08-14
+13 / −13 / ↑39 / ↓18
vs 2026-03-31
| Name | Title / Status | Ownership | Type |
|---|
Top Adds (vs prior quarter)
- NUVALENT INC$363.1M +20.5%
- REVOLUTION MEDICINES INC$224.6M +100.5%
- GENMAB A/S$122.5M +185.5%
- CENTENE CORP DEL$120.9M +62.4%
- LEGEND BIOTECH CORP$95.9M +69.0%
Top Trims
- COGENT BIOSCIENCES INC-$154.4M -44.3%
- INSPIRE MED SYS INC-$81.6M -58.5%
- NEOGENOMICS INC-$54.5M -81.7%
- LARIMAR THERAPEUTICS INC-$51.6M -32.2%
- CELCUITY INC-$43.8M -22.4%
New Positions
- REVOLUTION MEDICINES INC$251.7M
- CELCUITY INC$113.8M
- MINERALYS THERAPEUTICS INC$106.8M
- BOSTON SCIENTIFIC CORP$56.1M
- PARABILIS MEDICINES INC$51.5M
Exited Positions
- MIRUM PHARMACEUTICALS INC$209.4M
- CATALYST PHARMACEUTICALS INC$97.6M
- NEUROCRINE BIOSCIENCES INC$80.4M
- DAY ONE BIOPHARMACEUTICALS I$79.8M
- ENHABIT INC$66.9M
Rows tagged Call or Put are options positions, not stock. Per SEC Form 13F-HR, Value shows the notional value of the underlying (shares covered × underlying price), not the option premium. Shares is the number of underlying shares covered (divide by 100 for contract count).
| # | Issuer | Symbol | CUSIP | Value | Weight | Shares | Type |
|---|---|---|---|---|---|---|---|
| 1 | NUVALENT INC | NUVL | 670703107 | $2.13B | 22.22% | 17,248,450 | SH |
| 2 | BROOKDALE SR LIVING INC | — | 112463AF1 | $585.7M | 6.11% | 306,885,000 | PRN |
| 3 | REVOLUTION MEDICINES INC | RVMD | 76155X100 | $448.0M | 4.67% | 2,392,000 | SH |
| 4 | PRAXIS PRECISION MEDICINES I | PRAX | 74006W207 | $322.5M | 3.36% | 963,351 | SH |
| 5 | VIATRIS INC | VTRS | 92556V106 | $320.9M | 3.35% | 20,206,170 | SH |
| 6 | CENTENE CORP DEL | CNC | 15135B101 | $314.6M | 3.28% | 4,901,000 | SH |
| 7 | REVOLUTION MEDICINES INC | RVMDW | 76155XAA8 | $251.7M | 2.63% | 200,000,000 | PRN |
| 8 | UNITED THERAPEUTICS CORP DEL | UTHR | 91307C102 | $247.6M | 2.58% | 457,000 | SH |
| 9 | ARROWHEAD PHARMACEUTICALS IN | ARWR | 04280AAC4 | $240.5M | 2.51% | 200,000,000 | PRN |
| 10 | LEGEND BIOTECH CORP | LEGN | 52490G102 | $235.0M | 2.45% | 8,137,638 | SH |
| 11 | COGENT BIOSCIENCES INC | COGT | 19240Q201 | $193.7M | 2.02% | 5,006,104 | SH |
| 12 | GENMAB A/S | GMAB | 372303206 | $188.6M | 1.97% | 6,865,000 | SH |
| 13 | BROOKDALE SR LIVING INC | BKD | 112463104 | $187.2M | 1.95% | 11,637,032 | SH |
| 14 | VERA THERAPEUTICS INC | VERA | 92337R101 | $168.1M | 1.75% | 3,916,400 | SH |
| 15 | IONIS PHARMACEUTICALS INC | IONS | 462222100 | $157.0M | 1.64% | 1,979,669 | SH |
| 16 | CELCUITY INC | CELC | 15102K100 | $151.8M | 1.58% | 1,451,014 | SH |
| 17 | BIOCRYST PHARMACEUTICALS INC | BCRX | 09058V103 | $151.0M | 1.57% | 15,096,403 | SH |
| 18 | NEWAMSTERDAM PHARMA COMPANY | NAMS | N62509109 | $144.5M | 1.51% | 4,264,789 | SH |
| 19 | ACADIA HEALTHCARE COMPANY IN | ACHC | 00404A109 | $133.5M | 1.39% | 4,520,000 | SH |
| 20 | TANGO THERAPEUTICS INC | TNGX | 87583X109 | $131.0M | 1.37% | 4,190,611 | SH |
| 21 | ADAPTHEALTH CORP | AHCO | 00653Q102 | $119.6M | 1.25% | 11,477,730 | SH |
| 22 | PHARVARIS N V | PHVS | N69605108 | $116.7M | 1.22% | 3,376,042 | SH |
| 23 | CELCUITY INC | CELC | 15102KAB6 | $113.8M | 1.19% | 100,000,000 | PRN |
| 24 | ARROWHEAD PHARMACEUTICALS IN | ARWR | 04280A100 | $113.2M | 1.18% | 1,389,055 | SH |
| 25 | DIANTHUS THERAPEUTICS INC | DNTH | 252828108 | $109.7M | 1.14% | 1,125,313 | SH |
| 26 | LARIMAR THERAPEUTICS INC | LRMR | 517125100 | $108.6M | 1.13% | 35,606,974 | SH |
| 27 | MINERALYS THERAPEUTICS INC | MLYS | 603170101 | $106.8M | 1.11% | 3,958,000 | SH |
| 28 | ALIGNMENT HEALTHCARE INC | ALHC | 01625VAB0 | $103.8M | 1.08% | 61,000,000 | PRN |
| 29 | IDEAYA BIOSCIENCES INC | IDYA | 45166A102 | $101.2M | 1.06% | 2,714,503 | SH |
| 30 | XENON PHARMACEUTICALS INC | XENE | 98420N105 | $97.5M | 1.02% | 1,615,696 | SH |
| 31 | IONIS PHARMACEUTICALS INC | IONS | 462222AF7 | $93.1M | 0.97% | 60,000,000 | PRN |
| 32 | SAVARA INC | SVRA | 805111101 | $83.6M | 0.87% | 13,569,000 | SH |
| 33 | LANTHEUS HLDGS INC | LNTH | 516544103 | $83.5M | 0.87% | 752,999 | SH |
| 34 | SYNDAX PHARMACEUTICALS INC | SNDX | 87164F105 | $82.6M | 0.86% | 3,779,900 | SH |
| 35 | ZENAS BIOPHARMA INC | ZBIO | 98937LAA3 | $80.3M | 0.84% | 67,200,000 | PRN |
| 36 | BIOMARIN PHARMACEUTICAL INC | BMRN | 09061G101 | $76.3M | 0.80% | 1,332,836 | SH |
| 37 | PFIZER INC | PFE | 717081103 | $73.2M | 0.76% | 3,040,000 | SH |
| 38 | INDIVIOR PHARMACEUTICALS INC | INDV | 45579U109 | $67.7M | 0.71% | 1,648,895 | SH |
| 39 | BIO RAD LABS INC | BIO | 090572207 | $66.4M | 0.69% | 226,070 | SH |
| 40 | ARS PHARMACEUTICALS INC | SPRY | 82835W108 | $60.1M | 0.63% | 7,503,812 | SH |
| 41 | STOKE THERAPEUTICS INC | STOK | 86150R107 | $59.7M | 0.62% | 1,823,500 | SH |
| 42 | STRUCTURE THERAPEUTICS INC | GPCR | 86366E106 | $58.3M | 0.61% | 1,086,000 | SH |
| 43 | ENVISTA HOLDINGS CORPORATION | NVST | 29415F104 | $58.2M | 0.61% | 2,210,100 | SH |
| 44 | INSPIRE MED SYS INC | INSP | 457730109 | $57.9M | 0.60% | 1,296,862 | SH |
| 45 | CAREDX INC | CDNA | 14167L103 | $56.9M | 0.59% | 1,997,618 | SH |
| 46 | BOSTON SCIENTIFIC CORP | BSX | 101137107 | $56.1M | 0.59% | 1,315,000 | SH |
| 47 | BELITE BIO INC | BLTE | 07782B104 | $55.0M | 0.57% | 357,199 | SH |
| 48 | PARABILIS MEDICINES INC | PBLS | 698955101 | $51.5M | 0.54% | 1,880,704 | SH |
| 49 | CERTARA INC | CERT | 15687V109 | $49.2M | 0.51% | 7,512,928 | SH |
| 50 | DISC MEDICINE INC | IRON | 254604101 | $48.1M | 0.50% | 657,000 | SH |
| Period | Filed | AUM | Holdings | Accession |
|---|---|---|---|---|
| 2026-06-30 | 2026-08-14 | $9.59B | 82 | 0001213900-26-089991 |
| 2026-03-31 | 2026-05-15 | $8.48B | 82 | 0001213900-26-057678 |
| 2025-12-31 | 2026-02-17 | $7.83B | 150 | 0001213900-26-017265 |
| 2025-09-30 | 2025-11-14 | $6.55B | 152 | 0001213900-25-110851 |