Filed: 5/15/2026ACC: 0001213900-26-057678
📋 What this filing means
DEERFIELD MANAGEMENT COMPANY, L.P. filed this quarterly 13F‑HR report disclosing 82 equity positions with a total reported market value of $8.48B. This filing provides a transparent view of the manager's long equity holdings as of the quarter end.
82
Positions
$8.48B
Total AUM (reported)
1.17B
Total Shares
Allocation by class
COM$5.96B70.3%
NOTE 3.500%10/1$505.44M6.0%
COM NEW$392.99M4.6%
SPONSORED ADS$290.61M3.4%
CL A$212.76M2.5%
NOTE 4.000% 5/0$209.44M2.5%
NOTE 1/1$207.18M2.4%
Portfolio Concentration
Top 3$2.62B30.9%
4–10$1.69B19.9%
11–25$2.00B23.6%
Rest$2.17B25.6%
Top 3 weight
30.9%
Top 10 weight
50.9%
Voting Authority Distribution
Total shares with voting rights: 1.17B
Sole
Full voting authority
1.17B
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
Other82
Dominant voting typeSole · 100.0% of voting shares
Institutional Holdings82
Rows:
NUVALENT INC
DFNDShares17.25M
TypeSH
Market value$1.77B
20.85%
Sole
17.25M
Shared
0.00
None
0.00
BROOKDALE SR LIVING INC
DFNDShares306.88M
TypePRN
Market value$505.44M
5.96%
Sole
306.88M
Shared
0.00
None
0.00
COGENT BIOSCIENCES INC
DFNDShares9.04M
TypeSH
Market value$348.10M
4.11%
Sole
9.04M
Shared
0.00
None
0.00
PRAXIS PRECISION MEDICINES I
DFNDShares963.35K
TypeSH
Market value$310.38M
3.66%
Sole
963.35K
Shared
0.00
None
0.00
VIATRIS INC
DFNDShares20.21M
TypeSH
Market value$272.99M
3.22%
Sole
20.21M
Shared
0.00
None
0.00
UNITED THERAPEUTICS CORP DEL
DFNDShares457K
TypeSH
Market value$270.99M
3.20%
Sole
457K
Shared
0.00
None
0.00
REVOLUTION MEDICINES INC
DFNDShares2.30M
TypeSH
Market value$223.38M
2.64%
Sole
2.30M
Shared
0.00
None
0.00
MIRUM PHARMACEUTICALS INC
DFNDShares70M
TypePRN
Market value$209.44M
2.47%
Sole
70M
Shared
0.00
None
0.00
ARROWHEAD PHARMACEUTICALS IN
DFNDShares200M
TypePRN
Market value$207.18M
2.44%
Sole
200M
Shared
0.00
None
0.00
CELCUITY INC
DFNDShares1.71M
TypeSH
Market value$195.64M
2.31%
Sole
1.71M
Shared
0.00
None
0.00
CENTENE CORP DEL
DFNDShares5.92M
TypeSH
Market value$193.73M
2.29%
Sole
5.92M
Shared
0.00
None
0.00
LARIMAR THERAPEUTICS INC
DFNDShares35.61M
TypeSH
Market value$160.23M
1.89%
Sole
35.61M
Shared
0.00
None
0.00
BROOKDALE SR LIVING INC
DFNDShares11.64M
TypeSH
Market value$159.19M
1.88%
Sole
11.64M
Shared
0.00
None
0.00
VERA THERAPEUTICS INC
DFNDShares3.72M
TypeSH
Market value$149.74M
1.77%
Sole
3.72M
Shared
0.00
None
0.00
IONIS PHARMACEUTICALS INC
DFNDShares1.98M
TypeSH
Market value$148.65M
1.75%
Sole
1.98M
Shared
0.00
None
0.00
BIOCRYST PHARMACEUTICALS INC
DFNDShares15.04M
TypeSH
Market value$143.16M
1.69%
Sole
15.04M
Shared
0.00
None
0.00
INSPIRE MED SYS INC
DFNDShares2.70M
TypeSH
Market value$139.43M
1.64%
Sole
2.70M
Shared
0.00
None
0.00
LEGEND BIOTECH CORP
DFNDShares7.69M
TypeSH
Market value$139.07M
1.64%
Sole
7.69M
Shared
0.00
None
0.00
ADAPTHEALTH CORP
DFNDShares11.48M
TypeSH
Market value$136.58M
1.61%
Sole
11.48M
Shared
0.00
None
0.00
NEWAMSTERDAM PHARMA COMPANY
DFNDShares4.26M
TypeSH
Market value$136.52M
1.61%
Sole
4.26M
Shared
0.00
None
0.00
ACADIA HEALTHCARE COMPANY IN
DFNDShares4.52M
TypeSH
Market value$105.72M
1.25%
Sole
4.52M
Shared
0.00
None
0.00
ARROWHEAD PHARMACEUTICALS IN
DFNDShares1.57M
TypeSH
Market value$98.65M
1.16%
Sole
1.57M
Shared
0.00
None
0.00
CATALYST PHARMACEUTICALS INC
DFNDShares3.94M
TypeSH
Market value$97.64M
1.15%
Sole
3.94M
Shared
0.00
None
0.00
INDIVIOR PHARMACEUTICALS INC
DFNDShares3.10M
TypeSH
Market value$94.42M
1.11%
Sole
3.10M
Shared
0.00
None
0.00
XENON PHARMACEUTICALS INC
DFNDShares1.62M
TypeSH
Market value$93.95M
1.11%
Sole
1.62M
Shared
0.00
None
0.00
| Issuer | Class | Shares | Type | Value / Portfolio % | Voting — Sole | Shared | None |
|---|---|---|---|---|---|---|---|
NUVALENT INCDFND | COM | 17.25M | SH | $1.77B 20.85% | 17.25M | 0.00 | 0.00 |
BROOKDALE SR LIVING INCDFND | NOTE 3.500%10/1 | 306.88M | PRN | $505.44M 5.96% | 306.88M | 0.00 | 0.00 |
COGENT BIOSCIENCES INCDFND | COM | 9.04M | SH | $348.10M 4.11% | 9.04M | 0.00 | 0.00 |
PRAXIS PRECISION MEDICINES IDFND | COM NEW | 963.35K | SH | $310.38M 3.66% | 963.35K | 0.00 | 0.00 |
VIATRIS INCDFND | COM | 20.21M | SH | $272.99M 3.22% | 20.21M | 0.00 | 0.00 |
UNITED THERAPEUTICS CORP DELDFND | COM | 457K | SH | $270.99M 3.20% | 457K | 0.00 | 0.00 |
REVOLUTION MEDICINES INCDFND | COM | 2.30M | SH | $223.38M 2.64% | 2.30M | 0.00 | 0.00 |
MIRUM PHARMACEUTICALS INCDFND | NOTE 4.000% 5/0 | 70M | PRN | $209.44M 2.47% | 70M | 0.00 | 0.00 |
ARROWHEAD PHARMACEUTICALS INDFND | NOTE 1/1 | 200M | PRN | $207.18M 2.44% | 200M | 0.00 | 0.00 |
CELCUITY INCDFND | COM | 1.71M | SH | $195.64M 2.31% | 1.71M | 0.00 | 0.00 |
CENTENE CORP DELDFND | COM | 5.92M | SH | $193.73M 2.29% | 5.92M | 0.00 | 0.00 |
LARIMAR THERAPEUTICS INCDFND | COM | 35.61M | SH | $160.23M 1.89% | 35.61M | 0.00 | 0.00 |
BROOKDALE SR LIVING INCDFND | COM | 11.64M | SH | $159.19M 1.88% | 11.64M | 0.00 | 0.00 |
VERA THERAPEUTICS INCDFND | CL A | 3.72M | SH | $149.74M 1.77% | 3.72M | 0.00 | 0.00 |
IONIS PHARMACEUTICALS INCDFND | COM | 1.98M | SH | $148.65M 1.75% | 1.98M | 0.00 | 0.00 |
BIOCRYST PHARMACEUTICALS INCDFND | COM | 15.04M | SH | $143.16M 1.69% | 15.04M | 0.00 | 0.00 |
INSPIRE MED SYS INCDFND | COM | 2.70M | SH | $139.43M 1.64% | 2.70M | 0.00 | 0.00 |
LEGEND BIOTECH CORPDFND | SPONSORED ADS | 7.69M | SH | $139.07M 1.64% | 7.69M | 0.00 | 0.00 |
ADAPTHEALTH CORPDFND | COMMON STOCK | 11.48M | SH | $136.58M 1.61% | 11.48M | 0.00 | 0.00 |
NEWAMSTERDAM PHARMA COMPANYDFND | ORDINARY SHARES | 4.26M | SH | $136.52M 1.61% | 4.26M | 0.00 | 0.00 |
ACADIA HEALTHCARE COMPANY INDFND | COM | 4.52M | SH | $105.72M 1.25% | 4.52M | 0.00 | 0.00 |
ARROWHEAD PHARMACEUTICALS INDFND | COM | 1.57M | SH | $98.65M 1.16% | 1.57M | 0.00 | 0.00 |
CATALYST PHARMACEUTICALS INCDFND | COM | 3.94M | SH | $97.64M 1.15% | 3.94M | 0.00 | 0.00 |
INDIVIOR PHARMACEUTICALS INCDFND | COM | 3.10M | SH | $94.42M 1.11% | 3.10M | 0.00 | 0.00 |
XENON PHARMACEUTICALS INCDFND | COM | 1.62M | SH | $93.95M 1.11% | 1.62M | 0.00 | 0.00 |
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