DEERFIELD MANAGEMENT COMPANY, L.P. — 13F Holdings & Portfolio
CIK 1009258 · latest 13F-HR filed 2026-05-15
DEERFIELD MANAGEMENT COMPANY, L.P. manages $8.48B in 13F-reported U.S. long-equity assets across 82 reported positions as of its 2026-03-31 13F-HR filing. Its largest disclosed positions are NUVL (20.85%), BROOKDALE SR LIVING INC (5.96%), COGT (4.11%). Quarter over quarter (versus its 2025-12-31 filing) the fund opened 12 new positions, exited 79, added to 27, and trimmed 30.
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.
$8.48B
Long-equity book
82
Distinct positions
2026-03-31
Filed 2026-05-15
+12 / −79 / ↑27 / ↓30
vs 2025-12-31
| Name | Title / Status | Ownership | Type |
|---|
Top Adds (vs prior quarter)
- BROOKDALE SR LIVING INC$77.9M +18.2%
- XENON PHARMACEUTICALS INC$69.7M +286.7%
- UNITED THERAPEUTICS CORP DEL$63.4M +30.6%
- TANGO THERAPEUTICS INC$61.0M +236.8%
- DAY ONE BIOPHARMACEUTICALS I$45.1M +130.0%
Top Trims
- NEUROCRINE BIOSCIENCES INC-$87.6M -52.2%
- CENTENE CORP DEL-$71.6M -27.0%
- VERA THERAPEUTICS INC-$55.8M -27.2%
- ARS PHARMACEUTICALS INC-$27.2M -31.1%
- CERTARA INC-$24.3M -35.3%
New Positions
- ARROWHEAD PHARMACEUTICALS IN$207.2M
- INDIVIOR PHARMACEUTICALS INC$94.4M
- SYNDAX PHARMACEUTICALS INC$88.3M
- DIANTHUS THERAPEUTICS INC$85.6M
- PFIZER INC$85.4M
Exited Positions
- INDIVIOR PLC$121.7M
- PHREESIA INC$33.8M
- LANTHEUS HLDGS INC$28.9M
- VENTAS INC$27.4M
- SPYRE THERAPEUTICS INC$23.3M
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 | $1.77B | 20.85% | 17,248,450 | SH |
| 2 | BROOKDALE SR LIVING INC | — | 112463AF1 | $505.4M | 5.96% | 306,885,000 | PRN |
| 3 | COGENT BIOSCIENCES INC | COGT | 19240Q201 | $348.1M | 4.11% | 9,043,903 | SH |
| 4 | PRAXIS PRECISION MEDICINES I | PRAX | 74006W207 | $310.4M | 3.66% | 963,351 | SH |
| 5 | VIATRIS INC | VTRS | 92556V106 | $273.0M | 3.22% | 20,206,170 | SH |
| 6 | UNITED THERAPEUTICS CORP DEL | UTHR | 91307C102 | $271.0M | 3.20% | 457,000 | SH |
| 7 | REVOLUTION MEDICINES INC | RVMD | 76155X100 | $223.4M | 2.64% | 2,297,000 | SH |
| 8 | MIRUM PHARMACEUTICALS INC | MIRM | 604749AB7 | $209.4M | 2.47% | 70,000,000 | PRN |
| 9 | ARROWHEAD PHARMACEUTICALS IN | ARWR | 04280AAC4 | $207.2M | 2.44% | 200,000,000 | PRN |
| 10 | CELCUITY INC | CELC | 15102K100 | $195.6M | 2.31% | 1,714,000 | SH |
| 11 | CENTENE CORP DEL | CNC | 15135B101 | $193.7M | 2.29% | 5,917,091 | SH |
| 12 | LARIMAR THERAPEUTICS INC | LRMR | 517125100 | $160.2M | 1.89% | 35,606,974 | SH |
| 13 | BROOKDALE SR LIVING INC | BKD | 112463104 | $159.2M | 1.88% | 11,637,032 | SH |
| 14 | VERA THERAPEUTICS INC | VERA | 92337R101 | $149.7M | 1.77% | 3,722,100 | SH |
| 15 | IONIS PHARMACEUTICALS INC | IONS | 462222100 | $148.7M | 1.75% | 1,979,669 | SH |
| 16 | BIOCRYST PHARMACEUTICALS INC | BCRX | 09058V103 | $143.2M | 1.69% | 15,038,000 | SH |
| 17 | INSPIRE MED SYS INC | INSP | 457730109 | $139.4M | 1.64% | 2,703,238 | SH |
| 18 | LEGEND BIOTECH CORP | LEGN | 52490G102 | $139.1M | 1.64% | 7,687,638 | SH |
| 19 | ADAPTHEALTH CORP | AHCO | 00653Q102 | $136.6M | 1.61% | 11,477,730 | SH |
| 20 | NEWAMSTERDAM PHARMA COMPANY | NAMS | N62509109 | $136.5M | 1.61% | 4,264,789 | SH |
| 21 | ACADIA HEALTHCARE COMPANY IN | ACHC | 00404A109 | $105.7M | 1.25% | 4,520,000 | SH |
| 22 | ARROWHEAD PHARMACEUTICALS IN | ARWR | 04280A100 | $98.6M | 1.16% | 1,573,297 | SH |
| 23 | CATALYST PHARMACEUTICALS INC | CPRX | 14888U101 | $97.6M | 1.15% | 3,943,600 | SH |
| 24 | INDIVIOR PHARMACEUTICALS INC | INDV | 45579U109 | $94.4M | 1.11% | 3,097,790 | SH |
| 25 | XENON PHARMACEUTICALS INC | XENE | 98420N105 | $94.0M | 1.11% | 1,615,696 | SH |
| 26 | IONIS PHARMACEUTICALS INC | IONS | 462222AF7 | $90.6M | 1.07% | 60,000,000 | PRN |
| 27 | PHARVARIS N V | PHVS | N69605108 | $88.3M | 1.04% | 3,126,042 | SH |
| 28 | SYNDAX PHARMACEUTICALS INC | SNDX | 87164F105 | $88.3M | 1.04% | 3,779,900 | SH |
| 29 | TANGO THERAPEUTICS INC | TNGX | 87583X109 | $86.8M | 1.02% | 4,146,813 | SH |
| 30 | ALIGNMENT HEALTHCARE INC | ALHC | 01625VAB0 | $85.9M | 1.01% | 61,000,000 | PRN |
| 31 | DIANTHUS THERAPEUTICS INC | DNTH | 252828108 | $85.6M | 1.01% | 1,019,813 | SH |
| 32 | PFIZER INC | PFE | 717081103 | $85.4M | 1.01% | 3,040,000 | SH |
| 33 | NEUROCRINE BIOSCIENCES INC | NBIX | 64125C109 | $80.4M | 0.95% | 610,000 | SH |
| 34 | DAY ONE BIOPHARMACEUTICALS I | DAWN | 23954D109 | $79.8M | 0.94% | 3,723,131 | SH |
| 35 | SAVARA INC | SVRA | 805111101 | $74.1M | 0.87% | 13,569,000 | SH |
| 36 | ZENAS BIOPHARMA INC | ZBIO | 98937LAA3 | $67.3M | 0.79% | 65,000,000 | PRN |
| 37 | ENHABIT INC | EHAB | 29332G102 | $66.9M | 0.79% | 4,747,746 | SH |
| 38 | NEOGENOMICS INC | NEO | 64049MAB6 | $66.7M | 0.79% | 72,689,000 | PRN |
| 39 | GENMAB A/S | GMAB | 372303206 | $66.1M | 0.78% | 2,462,000 | SH |
| 40 | BIO RAD LABS INC | BIO | 090572207 | $63.0M | 0.74% | 226,070 | SH |
| 41 | LANTHEUS HLDGS INC | LNTH | 516544103 | $62.8M | 0.74% | 827,999 | SH |
| 42 | ARS PHARMACEUTICALS INC | SPRY | 82835W108 | $60.3M | 0.71% | 7,503,812 | SH |
| 43 | STOKE THERAPEUTICS INC | STOK | 86150R107 | $59.4M | 0.70% | 1,823,500 | SH |
| 44 | ENVISTA HOLDINGS CORPORATION | NVST | 29415F104 | $56.1M | 0.66% | 2,210,100 | SH |
| 45 | IDEAYA BIOSCIENCES INC | IDYA | 45166A102 | $51.0M | 0.60% | 1,530,008 | SH |
| 46 | BELITE BIO INC | BLTE | 07782B104 | $48.5M | 0.57% | 304,013 | SH |
| 47 | BIOMARIN PHARMACEUTICAL INC | BMRN | 09061G101 | $48.1M | 0.57% | 851,556 | SH |
| 48 | KYMERA THERAPEUTICS INC | KYMR | 501575104 | $46.7M | 0.55% | 561,170 | SH |
| 49 | CERTARA INC | CERT | 15687V109 | $44.5M | 0.53% | 7,808,605 | SH |
| 50 | BRIDGEBIO ONCOLOGY THERAPEUT | BBOT | 107924102 | $43.7M | 0.52% | 4,885,446 | SH |
| Period | Filed | AUM | Holdings | Accession |
|---|---|---|---|---|
| 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 |