Filed: 11/14/2025ACC: 0001213900-25-110851
📋 What this filing means
DEERFIELD MANAGEMENT COMPANY, L.P. filed this quarterly 13F‑HR report disclosing 152 equity positions with a total reported market value of $6.55B. This filing provides a transparent view of the manager's long equity holdings as of the quarter end.
152
Positions
$6.55B
Total AUM (reported)
665.75M
Total Shares
Allocation by class
COM$5.12B78.1%
CL A$171.09M2.6%
ORD$168.45M2.6%
NOTE 4.000% 5/0$168.19M2.6%
COMMON STOCK$148.82M2.3%
COM NEW$129.88M2.0%
ORDINARY SHARES$121.34M1.9%
Portfolio Concentration
Top 3$2.17B33.1%
4–10$1.22B18.6%
11–25$1.47B22.5%
Rest$1.69B25.8%
Top 3 weight
33.1%
Top 10 weight
51.7%
Voting Authority Distribution
Total shares with voting rights: 665.75M
Sole
Full voting authority
665.75M
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
Other152
Dominant voting typeSole · 100.0% of voting shares
Institutional Holdings152
Rows:
NUVALENT INC
DFNDShares17.99M
TypeSH
Market value$1.56B
23.75%
Sole
17.99M
Shared
0.00
None
0.00
CENTENE CORP DEL
DFNDShares9.05M
TypeSH
Market value$322.76M
4.93%
Sole
9.05M
Shared
0.00
None
0.00
MERUS N V
DFNDShares3.05M
TypeSH
Market value$286.87M
4.38%
Sole
3.05M
Shared
0.00
None
0.00
VIATRIS INC
DFNDShares24.10M
TypeSH
Market value$238.58M
3.64%
Sole
24.10M
Shared
0.00
None
0.00
UNITED THERAPEUTICS CORP DEL
DFNDShares425.99K
TypeSH
Market value$178.58M
2.73%
Sole
425.99K
Shared
0.00
None
0.00
REVOLUTION MEDICINES INC
DFNDShares3.65M
TypeSH
Market value$170.47M
2.60%
Sole
3.65M
Shared
0.00
None
0.00
INDIVIOR PLC
DFNDShares6.99M
TypeSH
Market value$168.45M
2.57%
Sole
6.99M
Shared
0.00
None
0.00
MIRUM PHARMACEUTICALS INC
DFNDShares70M
TypePRN
Market value$168.19M
2.57%
Sole
70M
Shared
0.00
None
0.00
NEUROCRINE BIOSCIENCES INC
DFNDShares1.18M
TypeSH
Market value$166.26M
2.54%
Sole
1.18M
Shared
0.00
None
0.00
COGENT BIOSCIENCES INC
DFNDShares9.05M
TypeSH
Market value$130.00M
1.98%
Sole
9.05M
Shared
0.00
None
0.00
IONIS PHARMACEUTICALS INC
DFNDShares1.98M
TypeSH
Market value$129.51M
1.98%
Sole
1.98M
Shared
0.00
None
0.00
NEWAMSTERDAM PHARMA COMPANY
DFNDShares4.27M
TypeSH
Market value$121.34M
1.85%
Sole
4.27M
Shared
0.00
None
0.00
VERA THERAPEUTICS INC
DFNDShares3.64M
TypeSH
Market value$105.81M
1.62%
Sole
3.64M
Shared
0.00
None
0.00
BRISTOL-MYERS SQUIBB CO
DFNDShares2.34M
TypeSH
Market value$105.43M
1.61%
Sole
2.34M
Shared
0.00
None
0.00
ADAPTHEALTH CORP
DFNDShares11.48M
TypeSH
Market value$102.73M
1.57%
Sole
11.48M
Shared
0.00
None
0.00
LARIMAR THERAPEUTICS INC
DFNDShares30.61M
TypeSH
Market value$98.86M
1.51%
Sole
30.61M
Shared
0.00
None
0.00
BROOKDALE SR LIVING INC
DFNDShares11.64M
TypeSH
Market value$98.60M
1.51%
Sole
11.64M
Shared
0.00
None
0.00
CATALYST PHARMACEUTICALS INC
DFNDShares4.97M
TypeSH
Market value$98.00M
1.50%
Sole
4.97M
Shared
0.00
None
0.00
LEGEND BIOTECH CORP
DFNDShares2.96M
TypeSH
Market value$96.60M
1.47%
Sole
2.96M
Shared
0.00
None
0.00
BIOCRYST PHARMACEUTICALS INC
DFNDShares12.17M
TypeSH
Market value$92.36M
1.41%
Sole
12.17M
Shared
0.00
None
0.00
TANDEM DIABETES CARE INC
DFNDShares100M
TypePRN
Market value$87.14M
1.33%
Sole
100M
Shared
0.00
None
0.00
MERCK & CO INC
DFNDShares1.03M
TypeSH
Market value$86.45M
1.32%
Sole
1.03M
Shared
0.00
None
0.00
PFIZER INC
DFNDShares3.30M
TypeSH
Market value$84.18M
1.29%
Sole
3.30M
Shared
0.00
None
0.00
IONIS PHARMACEUTICALS INC
DFNDShares60M
TypePRN
Market value$82.66M
1.26%
Sole
60M
Shared
0.00
None
0.00
CERTARA INC
DFNDShares6.74M
TypeSH
Market value$82.36M
1.26%
Sole
6.74M
Shared
0.00
None
0.00
| Issuer | Class | Shares | Type | Value / Portfolio % | Voting — Sole | Shared | None |
|---|---|---|---|---|---|---|---|
NUVALENT INCDFND | COM | 17.99M | SH | $1.56B 23.75% | 17.99M | 0.00 | 0.00 |
CENTENE CORP DELDFND | COM | 9.05M | SH | $322.76M 4.93% | 9.05M | 0.00 | 0.00 |
MERUS N VDFND | COM | 3.05M | SH | $286.87M 4.38% | 3.05M | 0.00 | 0.00 |
VIATRIS INCDFND | COM | 24.10M | SH | $238.58M 3.64% | 24.10M | 0.00 | 0.00 |
UNITED THERAPEUTICS CORP DELDFND | COM | 425.99K | SH | $178.58M 2.73% | 425.99K | 0.00 | 0.00 |
REVOLUTION MEDICINES INCDFND | COM | 3.65M | SH | $170.47M 2.60% | 3.65M | 0.00 | 0.00 |
INDIVIOR PLCDFND | ORD | 6.99M | SH | $168.45M 2.57% | 6.99M | 0.00 | 0.00 |
MIRUM PHARMACEUTICALS INCDFND | NOTE 4.000% 5/0 | 70M | PRN | $168.19M 2.57% | 70M | 0.00 | 0.00 |
NEUROCRINE BIOSCIENCES INCDFND | COM | 1.18M | SH | $166.26M 2.54% | 1.18M | 0.00 | 0.00 |
COGENT BIOSCIENCES INCDFND | COM | 9.05M | SH | $130.00M 1.98% | 9.05M | 0.00 | 0.00 |
IONIS PHARMACEUTICALS INCDFND | COM | 1.98M | SH | $129.51M 1.98% | 1.98M | 0.00 | 0.00 |
NEWAMSTERDAM PHARMA COMPANYDFND | ORDINARY SHARES | 4.27M | SH | $121.34M 1.85% | 4.27M | 0.00 | 0.00 |
VERA THERAPEUTICS INCDFND | CL A | 3.64M | SH | $105.81M 1.62% | 3.64M | 0.00 | 0.00 |
BRISTOL-MYERS SQUIBB CODFND | COM | 2.34M | SH | $105.43M 1.61% | 2.34M | 0.00 | 0.00 |
ADAPTHEALTH CORPDFND | COMMON STOCK | 11.48M | SH | $102.73M 1.57% | 11.48M | 0.00 | 0.00 |
LARIMAR THERAPEUTICS INCDFND | COM | 30.61M | SH | $98.86M 1.51% | 30.61M | 0.00 | 0.00 |
BROOKDALE SR LIVING INCDFND | COM | 11.64M | SH | $98.60M 1.51% | 11.64M | 0.00 | 0.00 |
CATALYST PHARMACEUTICALS INCDFND | COM | 4.97M | SH | $98.00M 1.50% | 4.97M | 0.00 | 0.00 |
LEGEND BIOTECH CORPDFND | SPONSORED ADS | 2.96M | SH | $96.60M 1.47% | 2.96M | 0.00 | 0.00 |
BIOCRYST PHARMACEUTICALS INCDFND | COM | 12.17M | SH | $92.36M 1.41% | 12.17M | 0.00 | 0.00 |
TANDEM DIABETES CARE INCDFND | NOTE 1.500% 3/1 | 100M | PRN | $87.14M 1.33% | 100M | 0.00 | 0.00 |
MERCK & CO INCDFND | COM | 1.03M | SH | $86.45M 1.32% | 1.03M | 0.00 | 0.00 |
PFIZER INCDFND | COM | 3.30M | SH | $84.18M 1.29% | 3.30M | 0.00 | 0.00 |
IONIS PHARMACEUTICALS INCDFND | NOTE 1.750% 6/1 | 60M | PRN | $82.66M 1.26% | 60M | 0.00 | 0.00 |
CERTARA INCDFND | COM | 6.74M | SH | $82.36M 1.26% | 6.74M | 0.00 | 0.00 |
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