Filed: 8/14/2025ACC: 0001213900-25-076586
📋 What this filing means
DEERFIELD MANAGEMENT COMPANY, L.P. filed this quarterly 13F‑HR report disclosing 124 equity positions with a total reported market value of $5.51B. This filing provides a transparent view of the manager's long equity holdings as of the quarter end.
124
Positions
$5.51B
Total AUM (reported)
741.12M
Total Shares
Allocation by class
COM$3.84B69.8%
CL A$383.41M7.0%
NOTE 0.500% 8/1$172.86M3.1%
ORD$155.76M2.8%
NOTE 1.000% 9/1$143.17M2.6%
NOTE 4.000% 5/0$124.21M2.3%
COMMON STOCK$120.21M2.2%
Portfolio Concentration
Top 3$1.84B33.3%
4–10$1.15B20.9%
11–25$1.38B25.0%
Rest$1.15B20.8%
Top 3 weight
33.3%
Top 10 weight
54.2%
Voting Authority Distribution
Total shares with voting rights: 741.12M
Sole
Full voting authority
741.12M
shares
% of voting shares100.0%
Shared
Joint voting authority
0.00
shares
% of voting shares0.0%
None
No voting authority
0.00
shares
% of voting shares0.0%
Investment Discretion (by position count)
Sole0
Shared0
Other124
Dominant voting typeSole · 100.0% of voting shares
Institutional Holdings124
Rows:
NUVALENT INC
DFNDShares17.99M
TypeSH
Market value$1.37B
24.91%
Sole
17.99M
Shared
0.00
None
0.00
OSCAR HEALTH INC
DFNDShares11.65M
TypeSH
Market value$249.77M
4.53%
Sole
11.65M
Shared
0.00
None
0.00
VIATRIS INC
DFNDShares24.02M
TypeSH
Market value$214.53M
3.89%
Sole
24.02M
Shared
0.00
None
0.00
MERUS N V
DFNDShares3.38M
TypeSH
Market value$178.03M
3.23%
Sole
3.38M
Shared
0.00
None
0.00
CENTENE CORP DEL
DFNDShares3.19M
TypeSH
Market value$172.90M
3.14%
Sole
3.19M
Shared
0.00
None
0.00
INTEGRA LIFESCIENCES HLDGS C
DFNDShares174.36M
TypePRN
Market value$172.86M
3.14%
Sole
174.36M
Shared
0.00
None
0.00
ARS PHARMACEUTICALS INC
DFNDShares9.72M
TypeSH
Market value$169.69M
3.08%
Sole
9.72M
Shared
0.00
None
0.00
INDIVIOR PLC
DFNDShares10.57M
TypeSH
Market value$155.76M
2.83%
Sole
10.57M
Shared
0.00
None
0.00
UNITED THERAPEUTICS CORP DEL
DFNDShares540.63K
TypeSH
Market value$155.35M
2.82%
Sole
540.63K
Shared
0.00
None
0.00
NEUROCRINE BIOSCIENCES INC
DFNDShares1.17M
TypeSH
Market value$146.78M
2.66%
Sole
1.17M
Shared
0.00
None
0.00
ALNYLAM PHARMACEUTICALS INC
DFNDShares110M
TypePRN
Market value$143.17M
2.60%
Sole
110M
Shared
0.00
None
0.00
REVOLUTION MEDICINES INC
DFNDShares3.38M
TypeSH
Market value$124.50M
2.26%
Sole
3.38M
Shared
0.00
None
0.00
MIRUM PHARMACEUTICALS INC
DFNDShares70M
TypePRN
Market value$124.21M
2.25%
Sole
70M
Shared
0.00
None
0.00
BROOKDALE SR LIVING INC
DFNDShares15.36M
TypeSH
Market value$106.92M
1.94%
Sole
15.36M
Shared
0.00
None
0.00
LEGEND BIOTECH CORP
DFNDShares2.96M
TypeSH
Market value$105.13M
1.91%
Sole
2.96M
Shared
0.00
None
0.00
PFIZER INC
DFNDShares4.31M
TypeSH
Market value$104.38M
1.89%
Sole
4.31M
Shared
0.00
None
0.00
ADAPTHEALTH CORP
DFNDShares9.90M
TypeSH
Market value$93.40M
1.70%
Sole
9.90M
Shared
0.00
None
0.00
NEWAMSTERDAM PHARMA COMPANY
DFNDShares5.12M
TypeSH
Market value$92.65M
1.68%
Sole
5.12M
Shared
0.00
None
0.00
IDEAYA BIOSCIENCES INC
DFNDShares3.92M
TypeSH
Market value$82.30M
1.49%
Sole
3.92M
Shared
0.00
None
0.00
VERA THERAPEUTICS INC
DFNDShares3.35M
TypeSH
Market value$78.88M
1.43%
Sole
3.35M
Shared
0.00
None
0.00
INSMED INC
DFNDShares700.70K
TypeSH
Market value$70.52M
1.28%
Sole
700.70K
Shared
0.00
None
0.00
MERCK & CO INC
DFNDShares857.72K
TypeSH
Market value$67.90M
1.23%
Sole
857.72K
Shared
0.00
None
0.00
CATALYST PHARMACEUTICALS INC
DFNDShares2.88M
TypeSH
Market value$62.48M
1.13%
Sole
2.88M
Shared
0.00
None
0.00
LARIMAR THERAPEUTICS INC
DFNDShares21.23M
TypeSH
Market value$61.36M
1.11%
Sole
21.23M
Shared
0.00
None
0.00
BAXTER INTL INC
DFNDShares1.92M
TypeSH
Market value$58.23M
1.06%
Sole
1.92M
Shared
0.00
None
0.00
| Issuer | Class | Shares | Type | Value / Portfolio % | Voting — Sole | Shared | None |
|---|---|---|---|---|---|---|---|
NUVALENT INCDFND | COM | 17.99M | SH | $1.37B 24.91% | 17.99M | 0.00 | 0.00 |
OSCAR HEALTH INCDFND | CL A | 11.65M | SH | $249.77M 4.53% | 11.65M | 0.00 | 0.00 |
VIATRIS INCDFND | COM | 24.02M | SH | $214.53M 3.89% | 24.02M | 0.00 | 0.00 |
MERUS N VDFND | COM | 3.38M | SH | $178.03M 3.23% | 3.38M | 0.00 | 0.00 |
CENTENE CORP DELDFND | COM | 3.19M | SH | $172.90M 3.14% | 3.19M | 0.00 | 0.00 |
INTEGRA LIFESCIENCES HLDGS CDFND | NOTE 0.500% 8/1 | 174.36M | PRN | $172.86M 3.14% | 174.36M | 0.00 | 0.00 |
ARS PHARMACEUTICALS INCDFND | COM | 9.72M | SH | $169.69M 3.08% | 9.72M | 0.00 | 0.00 |
INDIVIOR PLCDFND | ORD | 10.57M | SH | $155.76M 2.83% | 10.57M | 0.00 | 0.00 |
UNITED THERAPEUTICS CORP DELDFND | COM | 540.63K | SH | $155.35M 2.82% | 540.63K | 0.00 | 0.00 |
NEUROCRINE BIOSCIENCES INCDFND | COM | 1.17M | SH | $146.78M 2.66% | 1.17M | 0.00 | 0.00 |
ALNYLAM PHARMACEUTICALS INCDFND | NOTE 1.000% 9/1 | 110M | PRN | $143.17M 2.60% | 110M | 0.00 | 0.00 |
REVOLUTION MEDICINES INCDFND | COM | 3.38M | SH | $124.50M 2.26% | 3.38M | 0.00 | 0.00 |
MIRUM PHARMACEUTICALS INCDFND | NOTE 4.000% 5/0 | 70M | PRN | $124.21M 2.25% | 70M | 0.00 | 0.00 |
BROOKDALE SR LIVING INCDFND | COM | 15.36M | SH | $106.92M 1.94% | 15.36M | 0.00 | 0.00 |
LEGEND BIOTECH CORPDFND | SPONSORED ADS | 2.96M | SH | $105.13M 1.91% | 2.96M | 0.00 | 0.00 |
PFIZER INCDFND | COM | 4.31M | SH | $104.38M 1.89% | 4.31M | 0.00 | 0.00 |
ADAPTHEALTH CORPDFND | COMMON STOCK | 9.90M | SH | $93.40M 1.70% | 9.90M | 0.00 | 0.00 |
NEWAMSTERDAM PHARMA COMPANYDFND | ORDINARY SHARES | 5.12M | SH | $92.65M 1.68% | 5.12M | 0.00 | 0.00 |
IDEAYA BIOSCIENCES INCDFND | COM | 3.92M | SH | $82.30M 1.49% | 3.92M | 0.00 | 0.00 |
VERA THERAPEUTICS INCDFND | CL A | 3.35M | SH | $78.88M 1.43% | 3.35M | 0.00 | 0.00 |
INSMED INCDFND | COM PAR $.01 | 700.70K | SH | $70.52M 1.28% | 700.70K | 0.00 | 0.00 |
MERCK & CO INCDFND | COM | 857.72K | SH | $67.90M 1.23% | 857.72K | 0.00 | 0.00 |
CATALYST PHARMACEUTICALS INCDFND | COM | 2.88M | SH | $62.48M 1.13% | 2.88M | 0.00 | 0.00 |
LARIMAR THERAPEUTICS INCDFND | COM | 21.23M | SH | $61.36M 1.11% | 21.23M | 0.00 | 0.00 |
BAXTER INTL INCDFND | COM | 1.92M | SH | $58.23M 1.06% | 1.92M | 0.00 | 0.00 |
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