DEERFIELD MANAGEMENT COMPANY, L.P.

CIK 1009258 · EDGAR ↗

sum of disclosed values for 2026-03-31; 0 positions have no disclosed value and are left out of the sum, counted here rather than dropped: $8.5B
every reported holding for this filer and quarter, including ones with no disclosed value: 82
positions with no comparable holding in the prior quarter (kind new), 2026-03-31: 12
positions absent from this quarter's filing after being held last quarter (kind exit), 2026-03-31 — inferred from absence, not a sale record: 80

Quarter-end snapshot, filed up to 45 days later — not current holdings. What a 13F covers ↓

Changes · Quarter ended 2026-03-31. Newest filing in this build: 2026-07-31. Per-row filing dates are on each receipt.

Position changes into quarter 2026-03-31
The reviewed ticker for the filed issuer name and share class, the same mapping the Reported positions table uses. Symbols are never inferred from names; — means no reviewed mapping.	position matched across quarters by exact reported CUSIP over a registry gap — never a name match	NEW / ADD / TRIM / EXIT by share count · NO CHANGE = same shares; the value moved with price, so never an ADD or a TRIM · EXIT = absent this quarter (disposed, delisted, confidential, or reported by an affiliate) — the filing does not say which · NO PRIOR = no comparable prior quarter on record (a first filing, or a quarter filed inside an affiliate's report), so not called a new stake · n/c = not classifiable: value undisclosed on one side of the pair, or neither shares nor value can classify it · †v: the reported share count is unchanged across the pair; this build's data classified the change from its reported value; builds from 2026-09-10 on read it as NO CHANGE	derived by Public Filings from the published data; “no value” means the source did not disclose a usable value — never zero	reported unit changed across the pair (SH↔PRN); the share delta is withheld rather than fabricated	Prev value	Curr value	Prev shares	Curr shares
a reviewed mapping row for this filed issuer name and share class (never inferred from the name)	share class as filed: COM NEW · position key `pos:11142` · issuer key `iss:1475`	ADD	+$44.1M	+60,000	$266M	$310M	903,351	963,351
a reviewed mapping row for this filed issuer name and share class (never inferred from the name)	share class as filed: COM · position key `pos:15016` · issuer key `iss:1868`	ADD	+$63.4M	+31,007	$208M	$271M	425,993	457,000
a reviewed mapping row for this filed issuer name and share class (never inferred from the name)	share class as filed: COM · position key `pos:14656` · issuer key `iss:1552`	TRIM	−$7.2M	−597,613	$231M	$223M	2,894,613	2,297,000
—	share class as filed: NOTE 1/1 · position key `pos:11689` · issuer key `iss:172` PRN	NEW	+$207M	+200,000,000	$0	$207M	—	200,000,000
a reviewed mapping row for this filed issuer name and share class (never inferred from the name)	share class as filed: COM · position key `pos:12687` · issuer key `iss:419`	TRIM	−$71.6M	−530,907	$265M	$194M	6,447,998	5,917,091
—	share class as filed: COM · position key `sid:sec:prov:853ca021ff04669801b685877f2dabbb` · issuer key `cusip6:517125`	ADD	+$43.6M	+5,000,000	$117M	$160M	30,606,974	35,606,974
—	share class as filed: CL A · position key `sid:sec:prov:c6f0567aff349dfe2dab4a6ee5ba8988` · issuer key `cusip6:92337R`	TRIM	−$55.8M	−337,595	$206M	$150M	4,059,695	3,722,100
a reviewed mapping row for this filed issuer name and share class (never inferred from the name)	share class as filed: COM · position key `pos:15075` · issuer key `iss:265`	ADD	+$31.3M	+697,000	$112M	$143M	14,341,000	15,038,000
a reviewed mapping row for this filed issuer name and share class (never inferred from the name)	share class as filed: COM · position key `pos:13569` · issuer key `iss:975`	ADD	+$546K	+1,197,366	$139M	$139M	1,505,872	2,703,238
—	share class as filed: SPONSORED ADS · position key `sid:sec:prov:235b0febe313b5e3f4a7bc8d76a41721` · issuer key `cusip6:52490G`	ADD	+$10.1M	+1,755,638	$129M	$139M	5,932,000	7,687,638
a reviewed mapping row for this filed issuer name and share class (never inferred from the name)	share class as filed: ORDINARY SHARES · position key `pos:16384` · issuer key `iss:2294`	ADD	−$9.6M	+100,000	$146M	$137M	4,164,789	4,264,789
a reviewed mapping row for this filed issuer name and share class (never inferred from the name)	share class as filed: COM · position key `pos:15725` · issuer key `iss:172`	TRIM	−$23.0M	−259,649	$122M	$98.6M	1,832,946	1,573,297
a reviewed mapping row for this filed issuer name and share class (never inferred from the name)	share class as filed: COM · position key `pos:14204` · issuer key `iss:409`	TRIM	−$17.0M	−967,561	$115M	$97.6M	4,911,161	3,943,600
a reviewed mapping row for this filed issuer name and share class (never inferred from the name)	share class as filed: COM · position key `pos:17511` · issuer key `iss:963`	NEW	+$94.4M	+3,097,790	$0	$94.4M	—	3,097,790
a reviewed mapping row for this filed issuer name and share class (never inferred from the name)	share class as filed: COM · position key `pos:12517` · issuer key `iss:1997`	ADD	+$69.7M	+1,073,676	$24.3M	$94.0M	542,020	1,615,696
—	share class as filed: COM · position key `sid:sec:prov:eb359106a5c4d721cdc955ced4da0795` · issuer key `cusip6:87164F`	NEW	+$88.3M	+3,779,900	$0	$88.3M	—	3,779,900
a reviewed mapping row for this filed issuer name and share class (never inferred from the name)	share class as filed: COM · position key `pos:11535` · issuer key `iss:1757`	ADD	+$61.0M	+1,239,867	$25.8M	$86.8M	2,906,946	4,146,813
a reviewed mapping row for this filed issuer name and share class (never inferred from the name)	share class as filed: COM · position key `pos:17547` · issuer key `iss:577`	NEW	+$85.6M	+1,019,813	$0	$85.6M	—	1,019,813
a reviewed mapping row for this filed issuer name and share class (never inferred from the name)	share class as filed: COM · position key `pos:10790` · issuer key `iss:1444`	NEW	+$85.4M	+3,040,000	$0	$85.4M	—	3,040,000
a reviewed mapping row for this filed issuer name and share class (never inferred from the name)	share class as filed: COM · position key `pos:11462` · issuer key `iss:1296`	TRIM	−$87.6M	−574,345	$168M	$80.4M	1,184,345	610,000

Flags: no row carries a flag.

1–20 of the 100 changes on this page

Mark-to-market only (no share change) · 46

Positions whose share count is identical in both quarters; the value changed with price, not with a decision.

Positions held with no share change into quarter 2026-03-31
The reviewed ticker for the filed issuer name and share class, the same mapping the Reported positions table uses. Symbols are never inferred from names; — means no reviewed mapping.	position matched across quarters by exact reported CUSIP over a registry gap — never a name match	NEW / ADD / TRIM / EXIT by share count · NO CHANGE = same shares; the value moved with price, so never an ADD or a TRIM · EXIT = absent this quarter (disposed, delisted, confidential, or reported by an affiliate) — the filing does not say which · NO PRIOR = no comparable prior quarter on record (a first filing, or a quarter filed inside an affiliate's report), so not called a new stake · n/c = not classifiable: value undisclosed on one side of the pair, or neither shares nor value can classify it · †v: the reported share count is unchanged across the pair; this build's data classified the change from its reported value; builds from 2026-09-10 on read it as NO CHANGE	derived by Public Filings from the published data; “no value” means the source did not disclose a usable value — never zero	Prev value	Curr value	Prev shares	Curr shares
a reviewed mapping row for this filed issuer name and share class (never inferred from the name)	share class as filed: COM · position key `pos:13206` · issuer key `iss:1335`	NO CHANGE	+$32.1M	$1.7B	$1.8B	17,248,450	17,248,450
—	share class as filed: NOTE 3.500%10/1 · position key `pos:12458` · issuer key `iss:324` PRN	NO CHANGE	+$77.9M	$427M	$505M	306,885,000	306,885,000
a reviewed mapping row for this filed issuer name and share class (never inferred from the name)	share class as filed: COM · position key `pos:17421` · issuer key `iss:475`	NO CHANGE	+$26.9M	$321M	$348M	9,043,903	9,043,903
a reviewed mapping row for this filed issuer name and share class (never inferred from the name)	share class as filed: COM · position key `pos:16040` · issuer key `iss:1913`	NO CHANGE	+$21.4M	$252M	$273M	20,206,170	20,206,170
—	share class as filed: NOTE 4.000% 5/0 · position key `pos:13502` · issuer key `iss:1236` PRN	NO CHANGE	+$28.7M	$181M	$209M	70,000,000	70,000,000
a reviewed mapping row for this filed issuer name and share class (never inferred from the name)	share class as filed: COM · position key `pos:10390` · issuer key `iss:416`	NO CHANGE	+$24.7M	$171M	$196M	1,714,000	1,714,000
a reviewed mapping row for this filed issuer name and share class (never inferred from the name)	share class as filed: COM · position key `pos:10784` · issuer key `iss:324`	NO CHANGE	+$33.6M	$126M	$159M	11,637,032	11,637,032
a reviewed mapping row for this filed issuer name and share class (never inferred from the name)	share class as filed: COM · position key `pos:11517` · issuer key `iss:1003`	NO CHANGE	−$8.0M	$157M	$149M	1,979,669	1,979,669
—	share class as filed: COMMON STOCK · position key `sid:sec:prov:426666fb8d43f8a6c202109e44eb876f` · issuer key `cusip6:00653Q`	NO CHANGE	+$22.3M	$114M	$137M	11,477,730	11,477,730
a reviewed mapping row for this filed issuer name and share class (never inferred from the name)	share class as filed: COM · position key `pos:12414` · issuer key `iss:29`	NO CHANGE	+$41.6M	$64.1M	$106M	4,520,000	4,520,000
—	share class as filed: NOTE 1.750% 6/1 · position key `pos:11370` · issuer key `iss:1003` PRN	NO CHANGE	−$4.7M	$95.3M	$90.6M	60,000,000	60,000,000
a reviewed mapping row for this filed issuer name and share class (never inferred from the name)	share class as filed: COM · position key `pos:14578` · issuer key `iss:2296`	NO CHANGE	+$1.6M	$86.7M	$88.3M	3,126,042	3,126,042
—	share class as filed: NOTE 4.250%11/1 · position key `pos:13761` · issuer key `iss:74` PRN	NO CHANGE	−$6.7M	$92.6M	$85.9M	61,000,000	61,000,000
—	share class as filed: COM · position key `sid:sec:prov:5fa73bae4b4007f19790df8489a7fcc7` · issuer key `cusip6:23954D`	NO CHANGE	+$45.1M	$34.7M	$79.8M	3,723,131	3,723,131
—	share class as filed: COM · position key `sid:sec:prov:2bc6a25d40cf07124e3a03bdecf4a4df` · issuer key `cusip6:805111`	NO CHANGE	−$7.7M	$81.8M	$74.1M	13,569,000	13,569,000
—	share class as filed: COM · position key `sid:sec:prov:7bf659316464fda9fc46729d980abb67` · issuer key `cusip6:29332G`	NO CHANGE	+$23.1M	$43.8M	$66.9M	4,747,746	4,747,746
—	share class as filed: NOTE 0.250% 1/1 · position key `pos:13892` · issuer key `iss:1286` PRN	NO CHANGE	+$2.0M	$64.7M	$66.7M	72,689,000	72,689,000
a reviewed mapping row for this filed issuer name and share class (never inferred from the name)	share class as filed: CL A · position key `pos:13965` · issuer key `iss:264`	NO CHANGE	−$5.5M	$68.5M	$63.0M	226,070	226,070
a reviewed mapping row for this filed issuer name and share class (never inferred from the name)	share class as filed: COM · position key `pos:13781` · issuer key `iss:1096`	NO CHANGE	+$7.7M	$55.1M	$62.8M	827,999	827,999
a reviewed mapping row for this filed issuer name and share class (never inferred from the name)	share class as filed: COM · position key `pos:10399` · issuer key `iss:1659`	NO CHANGE	−$27.2M	$87.4M	$60.3M	7,503,812	7,503,812
—	share class as filed: COM · position key `sid:sec:prov:3fee4169345e05a49cf14bcc2babfc71` · issuer key `cusip6:86150R`	NO CHANGE	+$1.5M	$57.9M	$59.4M	1,823,500	1,823,500
a reviewed mapping row for this filed issuer name and share class (never inferred from the name)	share class as filed: COM · position key `pos:12598` · issuer key `iss:1082`	NO CHANGE	+$3.1M	$43.7M	$46.7M	561,170	561,170
a reviewed mapping row for this filed issuer name and share class (never inferred from the name)	share class as filed: COM · position key `pos:14583` · issuer key `iss:428`	NO CHANGE	−$24.3M	$68.8M	$44.5M	7,808,605	7,808,605
a reviewed mapping row for this filed issuer name and share class (never inferred from the name)	share class as filed: COM NEW · position key `pos:12072` · issuer key `iss:310`	NO CHANGE	−$17.4M	$61.2M	$43.7M	4,885,446	4,885,446
—	share class as filed: NOTE 2.500% 3/1 · position key `sid:sec:prov:e40e4bba291a4c5e0e2b5429181fff16` · issuer key `cusip6:53802L` PRN	NO CHANGE	+$308K	$39.7M	$40.0M	34,280,000	34,280,000
a reviewed mapping row for this filed issuer name and share class (never inferred from the name)	share class as filed: COM · position key `pos:10212` · issuer key `iss:1665`	NO CHANGE	−$1.0M	$39.9M	$38.9M	970,590	970,590
a reviewed mapping row for this filed issuer name and share class (never inferred from the name)	share class as filed: COM · position key `pos:12451` · issuer key `iss:393`	NO CHANGE	−$3.2M	$41.3M	$38.0M	2,191,000	2,191,000
—	share class as filed: SPONSORED ADS · position key `sid:sec:prov:862b191ccb923fc424f39385b48ce4f8` · issuer key `cusip6:86366E`	NO CHANGE	−$16.4M	$53.4M	$37.0M	767,993	767,993
—	share class as filed: NOTE 2.500% 2/0 · position key `pos:17713` · issuer key `iss:958` PRN	NO CHANGE	−$56.7K	$27.1M	$27.0M	30,000,000	30,000,000
a reviewed mapping row for this filed issuer name and share class (never inferred from the name)	share class as filed: COM · position key `pos:14904` · issuer key `iss:1899`	NO CHANGE	−$7.2M	$30.6M	$23.4M	726,000	726,000
a reviewed mapping row for this filed issuer name and share class (never inferred from the name)	share class as filed: COM · position key `pos:15131` · issuer key `iss:87`	NO CHANGE	−$4.5M	$27.0M	$22.5M	67,935	67,935
—	share class as filed: COM · position key `sid:sec:prov:c5f3f37de4d48fd1b29c266e9a76eb0b` · issuer key `cusip6:20454B`	NO CHANGE	−$288K	$19.4M	$19.1M	3,606,000	3,606,000
—	share class as filed: COM · position key `sid:sec:prov:025f5bfc45d0f21f39b99aeb6192bfc1` · issuer key `cusip6:501976`	NO CHANGE	−$1.5M	$18.8M	$17.3M	2,000,000	2,000,000
a reviewed mapping row for this filed issuer name and share class (never inferred from the name)	share class as filed: COM SHS · position key `pos:13793` · issuer key `iss:1763`	NO CHANGE	−$2.8M	$15.0M	$12.2M	2,722,165	2,722,165
—	share class as filed: COM · position key `pos:16134` · issuer key `iss:1362`	NO CHANGE	−$1.6M	$12.0M	$10.3M	3,360,052	3,360,052
a reviewed mapping row for this filed issuer name and share class (never inferred from the name)	share class as filed: COM · position key `pos:12625` · issuer key `iss:544`	NO CHANGE	+$1.5M	$4.0M	$5.5M	386,169	386,169
—	share class as filed: COM · position key `sid:sec:prov:45f58e3bf467aafd3516eb30bc85b601` · issuer key `cusip6:03589W`	NO CHANGE	+$304K	$2.9M	$3.2M	583,913	583,913
—	share class as filed: COM · position key `sid:sec:prov:1c7c81831d7de024bffc2474a53ee4b9` · issuer key `cusip6:014442`	NO CHANGE	+$623K	$1.6M	$2.3M	1,055,192	1,055,192
—	share class as filed: *W EXP 99/99/999 · position key `pos:13843` · issuer key `iss:2294`	NO CHANGE	−$275K	$2.1M	$1.9M	92,787	92,787
a reviewed mapping row for this filed issuer name and share class (never inferred from the name)	share class as filed: COM · position key `pos:16440` · issuer key `iss:637`	NO CHANGE	−$70.8K	$1.2M	$1.1M	13,702	13,702
a reviewed mapping row for this filed issuer name and share class (never inferred from the name)	share class as filed: COM · position key `pos:10550` · issuer key `iss:929`	NO CHANGE	−$75.9K	$235K	$159K	917	917
—	share class as filed: *W EXP 99/99/999 · position key `pos:11320` · issuer key `iss:1362`	NO CHANGE	−$95.9K	$151K	$54.8K	1,250,000	1,250,000
—	share class as filed: *W EXP 06/10/202 · position key `sid:sec:prov:caf6739f474e5aab1341e36d2fc446d1` · issuer key `cusip6:74765K`	NO CHANGE	−$30.6K	$66.8K	$36.2K	333,333	333,333
—	share class as filed: COM · position key `sid:sec:prov:325eed3e19d59a984be6eb2201e2d894` · issuer key `cusip6:69353Y`	NO CHANGE	−$88	$11.0K	$10.9K	8,790	8,790
—	share class as filed: *W EXP 08/01/203 · position key `sid:sec:prov:c4f97db1890f36f80c7a359d19822318` · issuer key `cusip6:86889P`	NO CHANGE	−$666	$3.3K	$2.7K	166,666	166,666
a reviewed mapping row for this filed issuer name and share class (never inferred from the name)	share class as filed: COM · position key `pos:15236` · issuer key `iss:1264`	NO CHANGE	−$833	$3.1K	$2.3K	505	505

Flags: no row carries a flag.

Holdings without a security ID are counted, not compared. Method ↗

Reported positions — 2026-03-31

77 issuers · 82 rows

View

This build carries one quarter for this manager: 2026-03-31. Notable managers carry four published quarters, others two.

This list carries reported issuer names and security identities, without a dated ticker mapping. Symbols are not inferred from names.

a position composed from a base filing plus NEW-HOLDINGS amendments keeps every source row here; the composition's latest filed date is the one shown served from this build's published holdings (derived from the filer's own reported rows); every row resolves to its filing

Share of total reported value, calculated only when the full position list has disclosed values. This is 13F long value, not total assets.

value undisclosed on the filing: retained and counted, excluded from sums, never shown as $0

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

NUVALENT INC · COM CUSIP —
2026-03-31 filed 2026-05-15 +45d

src ↗

$1.8B

17,248,450

20.8%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

BROOKDALE SR LIVING INC

2 positions · 2 reported rows

Rows DEERFIELD MANAGEMENT COMPANY, L.P. reported for BROOKDALE SR LIVING INC, as it reported them
BROOKDALE SR LIVING INC · NOTE 3.500%10/1 CUSIP — src ↗	$505M	306,885,000 PRN
BROOKDALE SR LIVING INC · COM CUSIP — src ↗	$159M	11,637,032

$665M

—

7.8%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

COGENT BIOSCIENCES INC · COM CUSIP —
2026-03-31 filed 2026-05-15 +45d

src ↗

$348M

9,043,903

4.1%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

PRAXIS PRECISION MEDICINES I · COM NEW CUSIP —
2026-03-31 filed 2026-05-15 +45d

src ↗

$310M

963,351

3.7%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

ARROWHEAD PHARMACEUTICALS IN

2 positions · 2 reported rows

Rows DEERFIELD MANAGEMENT COMPANY, L.P. reported for ARROWHEAD PHARMACEUTICALS IN, as it reported them
ARROWHEAD PHARMACEUTICALS IN · NOTE 1/1 CUSIP — src ↗	$207M	200,000,000 PRN
ARROWHEAD PHARMACEUTICALS IN · COM CUSIP — src ↗	$98.6M	1,573,297

$306M

—

3.6%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

VIATRIS INC · COM CUSIP —
2026-03-31 filed 2026-05-15 +45d

src ↗

$273M

20,206,170

3.2%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

UNITED THERAPEUTICS CORP DEL · COM CUSIP —
2026-03-31 filed 2026-05-15 +45d

src ↗

$271M

457,000

3.2%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

IONIS PHARMACEUTICALS INC

2 positions · 2 reported rows

Rows DEERFIELD MANAGEMENT COMPANY, L.P. reported for IONIS PHARMACEUTICALS INC, as it reported them
IONIS PHARMACEUTICALS INC · COM CUSIP — src ↗	$149M	1,979,669
IONIS PHARMACEUTICALS INC · NOTE 1.750% 6/1 CUSIP — src ↗	$90.6M	60,000,000 PRN

$239M

—

2.8%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

REVOLUTION MEDICINES INC · COM CUSIP —
2026-03-31 filed 2026-05-15 +45d

src ↗

$223M

2,297,000

2.6%

—

MIRUM PHARMACEUTICALS INC · NOTE 4.000% 5/0 CUSIP —
2026-03-31 filed 2026-05-15 +45d

src ↗

ticker not yet mapped

$209M

70,000,000 PRN

2.5%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

CELCUITY INC · COM CUSIP —
2026-03-31 filed 2026-05-15 +45d

src ↗

$196M

1,714,000

2.3%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

CENTENE CORP DEL · COM CUSIP —
2026-03-31 filed 2026-05-15 +45d

src ↗

$194M

5,917,091

2.3%

—

LARIMAR THERAPEUTICS INC · COM CUSIP 517125100
2026-03-31 filed 2026-05-15 +45d

src ↗

ticker not yet mapped

$160M

35,606,974

1.9%

—

VERA THERAPEUTICS INC · CL A CUSIP 92337R101
2026-03-31 filed 2026-05-15 +45d

src ↗

ticker not yet mapped

$150M

3,722,100

1.8%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

BIOCRYST PHARMACEUTICALS INC · COM CUSIP —
2026-03-31 filed 2026-05-15 +45d

src ↗

$143M

15,038,000

1.7%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

INSPIRE MED SYS INC · COM CUSIP —
2026-03-31 filed 2026-05-15 +45d

src ↗

$139M

2,703,238

1.6%

—

LEGEND BIOTECH CORP · SPONSORED ADS CUSIP 52490G102
2026-03-31 filed 2026-05-15 +45d

src ↗

ticker not yet mapped

$139M

7,687,638

1.6%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

NEWAMSTERDAM PHARMA COMPANY

2 positions · 2 reported rows

Rows DEERFIELD MANAGEMENT COMPANY, L.P. reported for NEWAMSTERDAM PHARMA COMPANY, as it reported them
NEWAMSTERDAM PHARMA COMPANY · ORDINARY SHARES CUSIP — src ↗	$137M	4,264,789
NEWAMSTERDAM PHARMA COMPANY · *W EXP 99/99/999 CUSIP — src ↗	$1.9M	92,787

$138M

4,357,576

1.6%

—

ADAPTHEALTH CORP · COMMON STOCK CUSIP 00653Q102
2026-03-31 filed 2026-05-15 +45d

src ↗

ticker not yet mapped

$137M

11,477,730

1.6%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

ACADIA HEALTHCARE COMPANY IN · COM CUSIP —
2026-03-31 filed 2026-05-15 +45d

src ↗

$106M

4,520,000

1.2%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

CATALYST PHARMACEUTICALS INC · COM CUSIP —
2026-03-31 filed 2026-05-15 +45d

src ↗

$97.6M

3,943,600

1.2%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

INDIVIOR PHARMACEUTICALS INC · COM CUSIP —
2026-03-31 filed 2026-05-15 +45d

src ↗

$94.4M

3,097,790

1.1%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

XENON PHARMACEUTICALS INC · COM CUSIP —
2026-03-31 filed 2026-05-15 +45d

src ↗

$94.0M

1,615,696

1.1%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

PHARVARIS N V · COM CUSIP —
2026-03-31 filed 2026-05-15 +45d

src ↗

$88.3M

3,126,042

1.0%

—

SYNDAX PHARMACEUTICALS INC · COM CUSIP 87164F105
2026-03-31 filed 2026-05-15 +45d

src ↗

ticker not yet mapped

$88.3M

3,779,900

1.0%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

TANGO THERAPEUTICS INC · COM CUSIP —
2026-03-31 filed 2026-05-15 +45d

src ↗

$86.8M

4,146,813

1.0%

—

ALIGNMENT HEALTHCARE INC · NOTE 4.250%11/1 CUSIP —
2026-03-31 filed 2026-05-15 +45d

src ↗

ticker not yet mapped

$85.9M

61,000,000 PRN

1.0%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

DIANTHUS THERAPEUTICS INC · COM CUSIP —
2026-03-31 filed 2026-05-15 +45d

src ↗

$85.6M

1,019,813

1.0%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

PFIZER INC · COM CUSIP —
2026-03-31 filed 2026-05-15 +45d

src ↗

$85.4M

3,040,000

1.0%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

NEUROCRINE BIOSCIENCES INC · COM CUSIP —
2026-03-31 filed 2026-05-15 +45d

src ↗

$80.4M

610,000

0.9%

—

DAY ONE BIOPHARMACEUTICALS I · COM CUSIP 23954D109
2026-03-31 filed 2026-05-15 +45d

src ↗

ticker not yet mapped

$79.8M

3,723,131

0.9%

—

SAVARA INC · COM CUSIP 805111101
2026-03-31 filed 2026-05-15 +45d

src ↗

ticker not yet mapped

$74.1M

13,569,000

0.9%

—

ZENAS BIOPHARMA INC · NOTE 2.500% 4/0 CUSIP 98937LAA3
2026-03-31 filed 2026-05-15 +45d

src ↗

ticker not yet mapped

$67.3M

65,000,000 PRN

0.8%

—

ENHABIT INC · COM CUSIP 29332G102
2026-03-31 filed 2026-05-15 +45d

src ↗

ticker not yet mapped

$66.9M

4,747,746

0.8%

—

NEOGENOMICS INC · NOTE 0.250% 1/1 CUSIP —
2026-03-31 filed 2026-05-15 +45d

src ↗

ticker not yet mapped

$66.7M

72,689,000 PRN

0.8%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

GENMAB A/S · SPONSORED ADS CUSIP —
2026-03-31 filed 2026-05-15 +45d

src ↗

$66.1M

2,462,000

0.8%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

BIO RAD LABS INC · CL A CUSIP —
2026-03-31 filed 2026-05-15 +45d

src ↗

$63.0M

226,070

0.7%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

LANTHEUS HLDGS INC · COM CUSIP —
2026-03-31 filed 2026-05-15 +45d

src ↗

$62.8M

827,999

0.7%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

ARS PHARMACEUTICALS INC · COM CUSIP —
2026-03-31 filed 2026-05-15 +45d

src ↗

$60.3M

7,503,812

0.7%

—

STOKE THERAPEUTICS INC · COM CUSIP 86150R107
2026-03-31 filed 2026-05-15 +45d

src ↗

ticker not yet mapped

$59.4M

1,823,500

0.7%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

ENVISTA HOLDINGS CORPORATION · COM CUSIP —
2026-03-31 filed 2026-05-15 +45d

src ↗

$56.1M

2,210,100

0.7%

—

IDEAYA BIOSCIENCES INC · COM CUSIP 45166A102
2026-03-31 filed 2026-05-15 +45d

src ↗

ticker not yet mapped

$51.0M

1,530,008

0.6%

—

BELITE BIO INC · SPONSORED ADS CUSIP 07782B104
2026-03-31 filed 2026-05-15 +45d

src ↗

ticker not yet mapped

$48.5M

304,013

0.6%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

BIOMARIN PHARMACEUTICAL INC · COM CUSIP —
2026-03-31 filed 2026-05-15 +45d

src ↗

$48.1M

851,556

0.6%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

KYMERA THERAPEUTICS INC · COM CUSIP —
2026-03-31 filed 2026-05-15 +45d

src ↗

$46.7M

561,170

0.6%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

CERTARA INC · COM CUSIP —
2026-03-31 filed 2026-05-15 +45d

src ↗

$44.5M

7,808,605

0.5%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

BRIDGEBIO ONCOLOGY THERAPEUT · COM NEW CUSIP —
2026-03-31 filed 2026-05-15 +45d

src ↗

$43.7M

4,885,446

0.5%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

DISC MEDICINE INC · COM CUSIP —
2026-03-31 filed 2026-05-15 +45d

src ↗

$42.0M

657,000

0.5%

—

LIVANOVA PLC · NOTE 2.500% 3/1 CUSIP 53802LAB8
2026-03-31 filed 2026-05-15 +45d

src ↗

ticker not yet mapped

$40.0M

34,280,000 PRN

0.5%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

SIONNA THERAPEUTICS INC · COM CUSIP —
2026-03-31 filed 2026-05-15 +45d

src ↗

$38.9M

970,590

0.5%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

CAREDX INC · COM CUSIP —
2026-03-31 filed 2026-05-15 +45d

src ↗

$38.0M

2,191,000

0.4%

—

STRUCTURE THERAPEUTICS INC · SPONSORED ADS CUSIP 86366E106
2026-03-31 filed 2026-05-15 +45d

src ↗

ticker not yet mapped

$37.0M

767,993

0.4%

—

IMMUNOCORE HLDGS PLC · NOTE 2.500% 2/0 CUSIP —
2026-03-31 filed 2026-05-15 +45d

src ↗

ticker not yet mapped

$27.0M

30,000,000 PRN

0.3%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

VERACYTE INC · COM CUSIP —
2026-03-31 filed 2026-05-15 +45d

src ↗

$23.4M

726,000

0.3%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

ALNYLAM PHARMACEUTICALS INC · COM CUSIP —
2026-03-31 filed 2026-05-15 +45d

src ↗

$22.5M

67,935

0.3%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

EMBECTA CORP · COMMON STOCK CUSIP —
2026-03-31 filed 2026-05-15 +45d

src ↗

$22.4M

2,534,961

0.3%

—

TYRA BIOSCIENCES INC · COM CUSIP 90240B106
2026-03-31 filed 2026-05-15 +45d

src ↗

ticker not yet mapped

$21.0M

549,000

0.2%

—

FOGHORN THERAPEUTICS INC · COM CUSIP 344174107
2026-03-31 filed 2026-05-15 +45d

src ↗

ticker not yet mapped

$21.0M

4,394,367

0.2%

—

BRIGHT MINDS BIOSCIENCES INC · COM NEW CUSIP 10919W405
2026-03-31 filed 2026-05-15 +45d

src ↗

ticker not yet mapped

$20.7M

283,000

0.2%

—

COMPASS THERAPEUTICS INC · COM CUSIP 20454B104
2026-03-31 filed 2026-05-15 +45d

src ↗

ticker not yet mapped

$19.1M

3,606,000

0.2%

—

MONOPAR THERAPEUTICS INC · COM NEW CUSIP 61023L207
2026-03-31 filed 2026-05-15 +45d

src ↗

ticker not yet mapped

$17.7M

323,745

0.2%

—

KYVERNA THERAPEUTICS INC · COM CUSIP 501976104
2026-03-31 filed 2026-05-15 +45d

src ↗

ticker not yet mapped

$17.3M

2,000,000

0.2%

—

SPYGLASS PHARMA INC · COM SHS CUSIP 85220G109
2026-03-31 filed 2026-05-15 +45d

src ↗

ticker not yet mapped

$14.3M

550,000

0.2%

—

BETA BIONICS INC · COM CUSIP 08659B102
2026-03-31 filed 2026-05-15 +45d

src ↗

ticker not yet mapped

$13.3M

1,324,000

0.2%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

TAYSHA GENE THERAPIES INC · COM SHS CUSIP —
2026-03-31 filed 2026-05-15 +45d

src ↗

$12.2M

2,722,165

0.1%

—

THE ONCOLOGY INSTITUTE INC

2 positions · 2 reported rows

Rows DEERFIELD MANAGEMENT COMPANY, L.P. reported for THE ONCOLOGY INSTITUTE INC, as it reported them
THE ONCOLOGY INSTITUTE INC · COM CUSIP — src ↗	$10.3M	3,360,052
THE ONCOLOGY INSTITUTE INC · *W EXP 99/99/999 CUSIP — src ↗	$54.8K	1,250,000

ticker not yet mapped

$10.4M

4,610,052

0.1%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

CULLINAN THERAPEUTICS INC · COM CUSIP —
2026-03-31 filed 2026-05-15 +45d

src ↗

$5.5M

386,169

0.1%

—

ANNEXON INC · COM CUSIP 03589W102
2026-03-31 filed 2026-05-15 +45d

src ↗

ticker not yet mapped

$3.2M

583,913

0.0%

—

ALECTOR INC · COM CUSIP 014442107
2026-03-31 filed 2026-05-15 +45d

src ↗

ticker not yet mapped

$2.3M

1,055,192

0.0%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

EDWARDS LIFESCIENCES CORP · COM CUSIP —
2026-03-31 filed 2026-05-15 +45d

src ↗

$1.1M

13,702

0.0%

—

BIOMX INC · COM NEW CUSIP 09090D509
2026-03-31 filed 2026-05-15 +45d

src ↗

ticker not yet mapped

$493K

131,272

0.0%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

VERADERMICS INC · COMMON STOCK CUSIP —
2026-03-31 filed 2026-05-15 +45d

src ↗

$316K

5,000

0.0%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

HUMANA INC · COM CUSIP —
2026-03-31 filed 2026-05-15 +45d

src ↗

$159K

917

0.0%

—

QUANTUM SI INC · *W EXP 06/10/202 CUSIP 74765K113
2026-03-31 filed 2026-05-15 +45d

src ↗

ticker not yet mapped

$36.2K

333,333

0.0%

—

PMV PHARMACEUTICALS INC · COM CUSIP 69353Y103
2026-03-31 filed 2026-05-15 +45d

src ↗

ticker not yet mapped

$10.9K

8,790

0.0%

—

SURROZEN INC · *W EXP 08/01/203 CUSIP 86889P117
2026-03-31 filed 2026-05-15 +45d

src ↗

ticker not yet mapped

$2.7K

166,666

0.0%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

MYRIAD GENETICS INC · COM CUSIP —
2026-03-31 filed 2026-05-15 +45d

src ↗

$2.3K

505

0.0%

1–20 of 77 issuers

One line per issuer, largest first — open a line for its reported rows. Grouping ↗

Book shape

Tick = median of the 8,748 tracked filers with a 2026-03-31 book (the index median: the 8,662 with a complete book). Concentration uses reported 13F long value, not total assets; the index is withheld when any position lacks a value.

share of the period's disclosed value held in the top-N positions; denominator is reported 13F value, not total assets: 74.4%below median 80.0%
integer Herfindahl–Hirschman index in basis points over disclosed position values: 602 bpsabove median 446 bps
holdings with no disclosed value (undisclosed, or unreadable on the filing) — kept and counted, never shown as zero: 82 / 82median book 97.5 positions

162 quarter-over-quarter rows

Filing history

Available filing periods
Period	Source
2026-03-31	EDGAR ↗

Complete source filings on SEC EDGAR

The filing on EDGAR is the record, including any filed after this build.

Open DEERFIELD MANAGEMENT COMPANY, L.P.'s 13F filings on SEC EDGAR ↗

A 13F is a quarterly, long-only snapshot filed up to 45 days late — not current holdings. what a 13F covers ↗

13F reports cover LONG positions in Section 13(f) securities (US exchange-traded equities plus reportable options, warrants, certain convertibles) held by managers with at least $100M in such securities — so managers below that threshold are absent entirely. No short positions, no cash, no non-13(f) assets — not a full portfolio, and not a census of institutional ownership.

Positions are quarter-end snapshots filed up to 45 days late — not current holdings: a position may have changed or closed since the quarter ended.

Values are the manager's stated market value at quarter-end in era-dependent units (whole dollars for form versions effective 2023-01-03 onward, thousands before), normalized here to whole dollars; each record notes its original unit.

Affiliated managers may report the same position, so one position can appear under more than one filer.

Positions under confidential treatment may be omitted until a later amendment discloses them.

These are disclosures, not investment advice.

Changes · Q1 2026Quarter ended 2026-03-31. Newest filing in this build: 2026-07-31. Per-row filing dates are on each receipt.

Reported positions — 2026-03-31

Book shape

Filing history

Changes · Quarter ended 2026-03-31. Newest filing in this build: 2026-07-31. Per-row filing dates are on each receipt.