ADVENT CAPITAL MANAGEMENT /DE/

CIK 1097278 · 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: $3.6B
every reported holding for this filer and quarter, including ones with no disclosed value: 215
positions with no comparable holding in the prior quarter (kind new), 2026-03-31: 48
positions absent from this quarter's filing after being held last quarter (kind exit), 2026-03-31 — inferred from absence, not a sale record: 58

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
—	share class as filed: COM · position key `pos:11570` · issuer key `iss:1599` CALL	TRIM	−$391M	−560,000	$586M	$195M	860,000	300,000
—	share class as filed: CONV PFD · position key `pos:13332` · issuer key `iss:230`	TRIM	−$19.0M	−8,139	$197M	$178M	157,311	149,172
—	share class as filed: CONV · position key `pos:16446` · issuer key `iss:1845` PRN	TRIM	−$41.6M	−23,518,000	$185M	$143M	142,238,000	118,720,000
—	share class as filed: CONV PFD · position key `pos:17053` · issuer key `iss:1311`	TRIM	+$6.8M	−51,206	$103M	$110M	1,988,322	1,937,116
—	share class as filed: CONV · position key `sid:sec:prov:436a347080752b89a828ac55d8adc53f` · issuer key `cusip6:92277G` PRN	TRIM	−$11.4M	−11,719,000	$104M	$92.9M	73,569,000	61,850,000
—	share class as filed: CONV · position key `pos:14071` · issuer key `iss:828` PRN	TRIM	−$19.7M	−19,544,000	$108M	$88.7M	119,816,000	100,272,000
—	share class as filed: CONV · position key `pos:11569` · issuer key `iss:357` PRN	TRIM	−$9.3M	−13,248,000	$94.3M	$85.0M	87,479,000	74,231,000
—	share class as filed: CONV · position key `sid:sec:prov:ac7fd895697b4693a1f2e8a549f09963` · issuer key `cusip6:69352P` PRN	ADD	+$7.9M	+2,846,000	$74.8M	$82.7M	67,596,000	70,442,000
—	share class as filed: CONV PFD · position key `pos:11984` · issuer key `iss:1042`	ADD	−$21.2M	+47,518	$104M	$82.5M	1,997,547	2,045,065
—	share class as filed: CONV PFD · position key `pos:11085` · issuer key `iss:141`	ADD	−$19.7M	+25,854	$96.4M	$76.7M	1,277,582	1,303,436
—	share class as filed: CONV · position key `pos:13806` · issuer key `iss:559` PRN	ADD	+$38.9M	+41,308,000	$37.5M	$76.4M	37,409,000	78,717,000
—	share class as filed: CONV · position key `pos:16026` · issuer key `iss:52` PRN	ADD	+$11.8M	+20,740,000	$50.6M	$62.4M	45,578,000	66,318,000
—	share class as filed: CONV PFD · position key `pos:12300` · issuer key `iss:1698`	ADD	+$12.4M	+204,386	$45.6M	$58.1M	916,989	1,121,375
—	share class as filed: CONV PFD · position key `pos:18007` · issuer key `iss:298`	ADD	−$2.7M	+18,020	$59.0M	$56.4M	849,161	867,181
—	share class as filed: CONV · position key `pos:12834` · issuer key `iss:50` PRN	ADD	+$34.6M	+37,444,000	$21.6M	$56.2M	19,818,000	57,262,000
—	share class as filed: CONV · position key `pos:13377` · issuer key `iss:1218` PRN	TRIM	−$52.7M	−52,285,000	$104M	$51.5M	105,126,000	52,841,000
—	share class as filed: CONV · position key `pos:17398` · issuer key `iss:421` PRN	TRIM	−$16.0M	−17,368,000	$65.1M	$49.1M	58,536,000	41,168,000
—	share class as filed: CONV · position key `sid:sec:prov:9f10df6db3a9218f1e99ca9a5f43665f` · issuer key `cusip6:65339K` PRN	TRIM	−$32.7M	−29,963,000	$81.6M	$48.9M	65,080,000	35,117,000
—	share class as filed: CONV · position key `pos:12668` · issuer key `iss:1096` PRN	TRIM	−$4.7M	−6,188,000	$53.0M	$48.3M	46,122,000	39,934,000
—	share class as filed: CONV · position key `pos:15517` · issuer key `iss:1698` PRN	TRIM	−$8.9M	−10,467,000	$57.1M	$48.2M	53,292,000	42,825,000

Flags: no row carries a flag.

1–20 of the 100 changes on this page

Mark-to-market only (no share change) · 28

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
—	share class as filed: CONV · position key `sid:sec:prov:a8e292d6ac28cd1cc90d9680f0fa6c56` · issuer key `cusip6:09709U` PRN	NO CHANGE	+$761K	$7.4M	$8.2M	6,800,000	6,800,000
—	share class as filed: CONV · position key `sid:sec:prov:adce4c5ecdcc009ba21fda81e2b24d17` · issuer key `cusip6:09257W` PRN	NO CHANGE	−$60.2K	$6.4M	$6.4M	6,398,000	6,398,000
—	share class as filed: CONV · position key `pos:11554` · issuer key `iss:1871` PRN	NO CHANGE	+$27.3K	$6.2M	$6.2M	6,413,000	6,413,000
—	share class as filed: CONV · position key `sid:sec:prov:adce6c62faf911cd8ac8c2bbc5668741` · issuer key `cusip6:55303J` PRN	NO CHANGE	−$4.0K	$5.7M	$5.7M	5,900,000	5,900,000
—	share class as filed: CONV · position key `sid:sec:prov:b9700585090d7673082b8fb84c8e7bba` · issuer key `cusip6:156727` PRN	NO CHANGE	−$84.3K	$5.6M	$5.5M	6,200,000	6,200,000
—	share class as filed: CONV · position key `pos:17951` · issuer key `iss:1118` PRN	NO CHANGE	+$132K	$5.2M	$5.4M	5,147,000	5,147,000
—	share class as filed: CONV · position key `pos:17713` · issuer key `iss:958` PRN	NO CHANGE	−$73.9K	$5.1M	$5.1M	5,600,000	5,600,000
—	share class as filed: CONV · position key `pos:12334` · issuer key `iss:1683` PRN	NO CHANGE	+$22.2K	$4.4M	$4.4M	4,850,000	4,850,000
—	share class as filed: CONV · position key `pos:17381` · issuer key `iss:1469` PRN	NO CHANGE	−$129K	$3.6M	$3.5M	3,150,000	3,150,000
—	share class as filed: CONV · position key `pos:13374` · issuer key `iss:1797` PRN	NO CHANGE	−$1.4M	$4.8M	$3.4M	2,800,000	2,800,000
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:15499` · issuer key `iss:23`	NO CHANGE	−$165K	$3.4M	$3.3M	15,000	15,000
—	share class as filed: CONV · position key `sid:sec:prov:fbf11f256e057cd971f1d31e1c046e51` · issuer key `cusip6:85571B` PRN	NO CHANGE	−$101K	$3.2M	$3.1M	3,000,000	3,000,000
—	share class as filed: CONV · position key `pos:15366` · issuer key `iss:416` PRN	NO CHANGE	+$254K	$2.1M	$2.4M	980,000	980,000
—	share class as filed: CONV · position key `sid:sec:prov:3c763c508e0385c245029aac42fd47c6` · issuer key `cusip6:92347M` PRN	NO CHANGE	+$51.3K	$2.0M	$2.1M	2,107,000	2,107,000
—	share class as filed: CONV · position key `pos:14939` · issuer key `iss:253` PRN	NO CHANGE	+$17.7K	$1.9M	$1.9M	1,980,000	1,980,000
—	share class as filed: CONV · position key `pos:17829` · issuer key `iss:1534` PRN	NO CHANGE	+$66.0K	$1.8M	$1.9M	1,800,000	1,800,000
—	share class as filed: CONV · position key `pos:13524` · issuer key `iss:584` PRN	NO CHANGE	+$17.2K	$1.5M	$1.5M	1,549,000	1,549,000
—	share class as filed: CONV · position key `sid:sec:prov:acab53632c18f96eb097c1e83d703a18` · issuer key `iss:2369` PRN	NO CHANGE	+$9.8K	$1.0M	$1.0M	1,058,000	1,058,000
—	share class as filed: CONV · position key `sid:sec:prov:04a24149b39c0a8ba2ce725d44d83235` · issuer key `cusip6:12685J` PRN	NO CHANGE	−$80.4K	$1.0M	$939K	1,244,000	1,244,000
—	share class as filed: CONV · position key `pos:15204` · issuer key `iss:1037` PRN	NO CHANGE	+$5.3K	$762K	$767K	775,000	775,000
—	share class as filed: CONV · position key `pos:11293` · issuer key `iss:311` PRN	NO CHANGE	−$27.9K	$569K	$541K	300,000	300,000
—	share class as filed: CONV · position key `sid:sec:prov:ef4e9ec5804f872796f7423ad78c8e3a` · issuer key `cusip6:00164V` PRN	NO CHANGE	−$68.5K	$495K	$427K	476,000	476,000
—	share class as filed: COM · position key `pos:17306` · issuer key `iss:801`	NO CHANGE	+$5.8K	$20.4K	$26.2K	6,778	6,778
—	share class as filed: COM · position key `pos:11108` · issuer key `iss:192`	NO CHANGE	−$1.6K	$13.8K	$12.2K	61,500	61,500
—	share class as filed: COM · position key `sid:sec:prov:e9ae8933a27958df5ad4ef411bb64553` · issuer key `cusip6:08975B`	NO CHANGE	−$21.0K	$29.2K	$8.2K	18,260	18,260
—	share class as filed: COM · position key `sid:sec:prov:328806cd5b7cc3ce3e1967f9508e1ed8` · issuer key `cusip6:683712`	NO CHANGE	−$354	$1.1K	$725	1,199	1,199
—	share class as filed: COM · position key `sid:sec:prov:cd27346f5d8e23242090c8583b4561c0` · issuer key `cusip6:683712`	NO CHANGE	−$329	$624	$295	1,199	1,199
—	share class as filed: COM · position key `sid:sec:prov:fe16a0c632d954f97f3d9fc127011e48` · issuer key `cusip6:683712`	NO CHANGE	−$197	$479	$282	1,199	1,199

Flags: no row carries a flag.

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

Reported positions — 2026-03-31

184 issuers · 215 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

—

State Street SPDR S&P 500 ETF

2 positions · 2 reported rows

Rows ADVENT CAPITAL MANAGEMENT /DE/ reported for State Street SPDR S&P 500 ETF, as it reported them
State Street SPDR S&P 500 ETF · COM · CALL CUSIP — src ↗	$195M	300,000
State Street SPDR S&P 500 ETF · COM · PUT CUSIP — src ↗	$27.6M	42,500

ticker not yet mapped

$223M

342,500

6.1%

—

BANK OF AMERICA CORP · CONV PFD CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$178M

149,172

4.9%

—

UBER TECHNOLOGIES INC · CONV CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$143M

118,720,000 PRN

4.0%

—

NEXTERA ENERGY INC · CONV PFD CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$110M

1,937,116

3.0%

—

SOUTHERN CO

2 positions · 2 reported rows

Rows ADVENT CAPITAL MANAGEMENT /DE/ reported for SOUTHERN CO, as it reported them
SOUTHERN CO · CONV PFD CUSIP — src ↗	$58.1M	1,121,375
SOUTHERN CO · CONV CUSIP — src ↗	$48.2M	42,825,000 PRN

ticker not yet mapped

$106M

—

2.9%

—

VENTAS REALTY LP · CONV CUSIP 92277GAZ0
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$92.9M

61,850,000 PRN

2.6%

—

GLOBAL PAYMENTS INC · CONV CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$88.7M

100,272,000 PRN

2.4%

—

CMS ENERGY CORP · CONV CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$85.0M

74,231,000 PRN

2.3%

—

PPL CAPITAL FUNDING INC · CONV CUSIP 69352PAS2
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$82.7M

70,442,000 PRN

2.3%

—

KKR & CO INC · CONV PFD CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$82.5M

2,045,065

2.3%

—

APOLLO GLOBAL MANAGEMENT · CONV PFD CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$76.7M

1,303,436

2.1%

—

DATADOG INC · CONV CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$76.4M

78,717,000 PRN

2.1%

—

PG&E CORP

2 positions · 2 reported rows

Rows ADVENT CAPITAL MANAGEMENT /DE/ reported for PG&E CORP, as it reported them
PG&E CORP · CONV CUSIP — src ↗	$46.9M	44,628,000 PRN
PG&E CORP · CONV PFD CUSIP — src ↗	$20.3M	470,385

ticker not yet mapped

$67.2M

—

1.9%

—

AFFIRM HOLDINGS INC · CONV CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$62.4M

66,318,000 PRN

1.7%

—

BOEING CO/THE · CONV PFD CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$56.4M

867,181

1.6%

—

AEROVIRONMENT INC · CONV CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$56.2M

57,262,000 PRN

1.5%

—

MERITAGE HOMES CORP · CONV CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$51.5M

52,841,000 PRN

1.4%

—

STRATEGY INC

4 positions · 4 reported rows

Rows ADVENT CAPITAL MANAGEMENT /DE/ reported for STRATEGY INC, as it reported them
STRATEGY INC · CONV CUSIP — src ↗	$27.9M	28,936,000 PRN
STRATEGY INC · CONV CUSIP — src ↗	$15.1M	14,597,000 PRN
STRATEGY INC · CONV PFD CUSIP — src ↗	$7.0M	97,805
STRATEGY INC · CONV CUSIP — src ↗	$1.1M	965,000 PRN

ticker not yet mapped

$51.0M

—

1.4%

—

CENTERPOINT ENERGY INC · CONV CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$49.1M

41,168,000 PRN

1.4%

—

NEXTERA ENERGY CAPITAL · CONV CUSIP 65339KCY4
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$48.9M

35,117,000 PRN

1.3%

—

LANTHEUS HOLDINGS INC · CONV CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$48.3M

39,934,000 PRN

1.3%

—

MICROCHIP TECHNOLOGY INC

2 positions · 2 reported rows

Rows ADVENT CAPITAL MANAGEMENT /DE/ reported for MICROCHIP TECHNOLOGY INC, as it reported them
MICROCHIP TECHNOLOGY INC · CONV PFD CUSIP — src ↗	$43.5M	760,734
MICROCHIP TECHNOLOGY INC · CONV CUSIP — src ↗	$4.3M	4,377,000 PRN

ticker not yet mapped

$47.8M

—

1.3%

—

SUPER MICRO COMPUTER INC

2 positions · 2 reported rows

Rows ADVENT CAPITAL MANAGEMENT /DE/ reported for SUPER MICRO COMPUTER INC, as it reported them
SUPER MICRO COMPUTER INC · CONV CUSIP — src ↗	$43.7M	54,492,000 PRN
Super Micro Computer Inc · COM · PUT CUSIP — src ↗	$2.3M	100,000

ticker not yet mapped

$46.0M

—

1.3%

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

AKAMAI TECHNOLOGIES INC

3 positions · 3 reported rows

Rows ADVENT CAPITAL MANAGEMENT /DE/ reported for AKAMAI TECHNOLOGIES INC, as it reported them
AKAMAI TECHNOLOGIES INC · CONV CUSIP — src ↗	$41.1M	35,844,000 PRN
AKAMAI TECHNOLOGIES INC · CONV CUSIP — src ↗	$2.0M	1,762,000 PRN
Akamai Technologies Inc · COM · CALL CUSIP — src ↗	$689K	6,000

$43.8M

—

1.2%

—

TETRA TECH INC · CONV CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$41.9M

39,825,000 PRN

1.2%

—

WEC ENERGY GROUP INC · CONV CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$41.4M

33,029,000 PRN

1.1%

—

LIVE NATION ENTERTAINMEN

2 positions · 2 reported rows

Rows ADVENT CAPITAL MANAGEMENT /DE/ reported for LIVE NATION ENTERTAINMEN, as it reported them
LIVE NATION ENTERTAINMEN · CONV CUSIP — src ↗	$27.0M	24,865,000 PRN
LIVE NATION ENTERTAINMEN · CONV CUSIP — src ↗	$13.0M	8,495,000 PRN

ticker not yet mapped

$40.0M

33,360,000 PRN

1.1%

—

RIVIAN AUTO INC

2 positions · 2 reported rows

Rows ADVENT CAPITAL MANAGEMENT /DE/ reported for RIVIAN AUTO INC, as it reported them
RIVIAN AUTO INC · CONV CUSIP — src ↗	$33.9M	34,659,000 PRN
RIVIAN AUTO INC · CONV CUSIP — src ↗	$5.9M	5,476,000 PRN

ticker not yet mapped

$39.7M

40,135,000 PRN

1.1%

—

WESTERN DIGITAL CORP · CONV CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$39.5M

5,501,000 PRN

1.1%

—

GUIDEWIRE SOFTWARE INC · CONV CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$38.6M

38,433,000 PRN

1.1%

—

SNOWFLAKE INC · CONV CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$38.2M

31,182,000 PRN

1.1%

—

MARRIOTT VACATION WORLDW · CONV CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$38.1M

39,178,000 PRN

1.1%

—

ARES MANAGEMENT CORP · CONV PFD CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$34.7M

933,089

1.0%

—

PARSONS CORP · CONV CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$32.2M

32,542,000 PRN

0.9%

—

DUKE ENERGY CORP · CONV CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$32.2M

28,645,000 PRN

0.9%

—

TRIP.COM GROUP LTD · CONV CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$31.4M

30,199,000 PRN

0.9%

—

DRAFTKINGS HOLDINGS INC · CONV CUSIP 26142RAB0
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$29.5M

32,652,000 PRN

0.8%

—

SUNRUN INC · CONV CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$29.2M

24,367,000 PRN

0.8%

—

ETSY INC

2 positions · 2 reported rows

Rows ADVENT CAPITAL MANAGEMENT /DE/ reported for ETSY INC, as it reported them
ETSY INC · CONV CUSIP — src ↗	$21.6M	23,121,000 PRN
ETSY INC · CONV CUSIP — src ↗	$6.8M	7,000,000 PRN

ticker not yet mapped

$28.4M

30,121,000 PRN

0.8%

—

Advent Convertible Bond ETF · COM CUSIP 75526L845
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$28.2M

1,083,500

0.8%

—

ON SEMICONDUCTOR CORP

2 positions · 2 reported rows

Rows ADVENT CAPITAL MANAGEMENT /DE/ reported for ON SEMICONDUCTOR CORP, as it reported them
ON SEMICONDUCTOR CORP · CONV CUSIP — src ↗	$22.2M	22,686,000 PRN
ON SEMICONDUCTOR CORP · CONV CUSIP — src ↗	$4.3M	3,343,000 PRN

ticker not yet mapped

$26.6M

26,029,000 PRN

0.7%

—

ENPHASE ENERGY INC · CONV CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$24.6M

27,480,000 PRN

0.7%

—

HP ENTERPRISE CO · CONV PFD CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$24.4M

375,591

0.7%

—

RIOT PLATFORMS INC · CONV CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$23.7M

20,554,000 PRN

0.7%

—

CLEANSPARK INC · CONV CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$22.8M

23,547,000 PRN

0.6%

—

SNAP INC

2 positions · 2 reported rows

Rows ADVENT CAPITAL MANAGEMENT /DE/ reported for SNAP INC, as it reported them
SNAP INC · CONV CUSIP — src ↗	$18.2M	22,518,000 PRN
SNAP INC · CONV CUSIP — src ↗	$4.4M	4,850,000 PRN

ticker not yet mapped

$22.6M

27,368,000 PRN

0.6%

—

HAEMONETICS CORP · CONV CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$22.2M

23,015,000 PRN

0.6%

—

TRAVERE THERAPEUTICS INC · CONV CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$22.0M

17,392,000 PRN

0.6%

—

ITRON INC · CONV CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$21.9M

21,671,000 PRN

0.6%

—

BRIDGEBIO PHARMA INC

2 positions · 2 reported rows

Rows ADVENT CAPITAL MANAGEMENT /DE/ reported for BRIDGEBIO PHARMA INC, as it reported them
BRIDGEBIO PHARMA INC · CONV CUSIP — src ↗	$21.2M	18,870,000 PRN
BRIDGEBIO PHARMA INC · CONV CUSIP — src ↗	$541K	300,000 PRN

ticker not yet mapped

$21.8M

19,170,000 PRN

0.6%

—

VISHAY INTERTECHNOLOGY · CONV CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$21.2M

22,037,000 PRN

0.6%

—

BRUKER CORP · CONV PFD CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$20.6M

71,120

0.6%

—

QXO INC · CONV PFD CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$20.5M

367,465

0.6%

—

REPLIGEN CORP · CONV CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$20.4M

20,783,000 PRN

0.6%

—

NUTANIX INC

2 positions · 2 reported rows

Rows ADVENT CAPITAL MANAGEMENT /DE/ reported for NUTANIX INC, as it reported them
NUTANIX INC · CONV CUSIP — src ↗	$12.8M	14,172,000 PRN
NUTANIX INC · CONV CUSIP — src ↗	$7.3M	7,160,000 PRN

ticker not yet mapped

$20.1M

21,332,000 PRN

0.6%

—

ARRAY TECHNOLOGIES INC · CONV CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$20.0M

21,977,000 PRN

0.6%

—

BILL HOLDINGS INC · CONV CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$19.9M

22,260,000 PRN

0.5%

—

DEXCOM INC · CONV CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$19.5M

21,095,000 PRN

0.5%

—

UPSTART HOLDINGS INC

2 positions · 2 reported rows

Rows ADVENT CAPITAL MANAGEMENT /DE/ reported for UPSTART HOLDINGS INC, as it reported them
UPSTART HOLDINGS INC · CONV CUSIP — src ↗	$14.5M	14,822,000 PRN
UPSTART HOLDINGS INC · CONV CUSIP — src ↗	$4.9M	6,806,000 PRN

ticker not yet mapped

$19.4M

21,628,000 PRN

0.5%

—

JAZZ INVESTMENTS I LTD · CONV CUSIP 472145AH4
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$19.3M

13,597,000 PRN

0.5%

—

JETBLUE AIRWAYS CORP · CONV CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$18.8M

19,404,000 PRN

0.5%

—

PENNYMAC CORP · CONV CUSIP 70932AAH6
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$18.4M

17,143,000 PRN

0.5%

—

WELLS FARGO & COMPANY · CONV PFD CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$17.2M

148,222

0.5%

—

PROGRESS SOFTWARE CORP · CONV CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$15.9M

17,784,000 PRN

0.4%

—

MKS INC · CONV CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$15.7M

9,458,000 PRN

0.4%

—

SOLARIS ENERGY INFRASTRU · CONV CUSIP 83419XAB4
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$15.7M

12,492,000 PRN

0.4%

—

SHIFT4 PAYMENTS INC

2 positions · 2 reported rows

Rows ADVENT CAPITAL MANAGEMENT /DE/ reported for SHIFT4 PAYMENTS INC, as it reported them
SHIFT4 PAYMENTS INC · CONV PFD CUSIP — src ↗	$13.2M	247,214
SHIFT4 PAYMENTS INC · CONV CUSIP — src ↗	$2.4M	2,498,000 PRN

ticker not yet mapped

$15.5M

—

0.4%

—

WINNEBAGO INDUSTRIES · CONV CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$15.5M

16,953,000 PRN

0.4%

—

NOVANTA INC · CONV PFD CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$15.4M

287,611

0.4%

—

NORTHERN OIL & GAS INC · CONV CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$15.0M

13,396,000 PRN

0.4%

—

TELADOC HEALTH INC · CONV CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$14.0M

14,539,000 PRN

0.4%

—

UPWORK INC · CONV CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$13.9M

14,174,000 PRN

0.4%

—

ENOVIS CORP · CONV CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$13.7M

13,929,000 PRN

0.4%

—

MARA HOLDINGS INC

2 positions · 2 reported rows

Rows ADVENT CAPITAL MANAGEMENT /DE/ reported for MARA HOLDINGS INC, as it reported them
MARA HOLDINGS INC · CONV CUSIP 565788AD8 src ↗	$10.8M	12,689,000 PRN
MARA HOLDINGS INC · CONV CUSIP 565788AF3 src ↗	$2.5M	2,800,000 PRN

ticker not yet mapped

$13.3M

15,489,000 PRN

0.4%

—

HALOZYME THERAPEUTICS IN

2 positions · 2 reported rows

Rows ADVENT CAPITAL MANAGEMENT /DE/ reported for HALOZYME THERAPEUTICS IN, as it reported them
HALOZYME THERAPEUTICS IN · CONV CUSIP — src ↗	$10.1M	7,867,000 PRN
HALOZYME THERAPEUTICS IN · CONV CUSIP — src ↗	$3.0M	2,832,000 PRN

ticker not yet mapped

$13.0M

10,699,000 PRN

0.4%

—

COINBASE GLOBAL INC · CONV CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$13.0M

13,923,000 PRN

0.4%

—

FIVE9 INC · CONV CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$12.6M

14,439,000 PRN

0.3%

—

GUARDANT HEALTH INC · CONV CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$12.4M

12,009,000 PRN

0.3%

—

NEOGENOMICS INC · CONV CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$12.3M

13,479,000 PRN

0.3%

—

UGI CORP · CONV CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$11.9M

8,403,000 PRN

0.3%

—

LUMENTUM HOLDINGS INC · CONV CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$11.1M

1,099,000 PRN

0.3%

—

ALIBABA GROUP HOLDING · CONV CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$10.3M

7,389,000 PRN

0.3%

—

NCL CORPORATION LTD · CONV CUSIP 62886HBD2
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$9.3M

9,534,000 PRN

0.3%

—

FLUOR CORP · CONV CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$9.2M

7,447,000 PRN

0.3%

—

SOFI TECHNOLOGIES INC · CONV CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$9.2M

8,948,000 PRN

0.3%

—

APPLIED OPTOELECTRONICS · CONV CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$8.9M

3,956,000 PRN

0.2%

—

BURLINGTON STORES INC · CONV CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$8.3M

5,000,000 PRN

0.2%

—

SIRIUS XM HOLDINGS

2 positions · 2 reported rows

Rows ADVENT CAPITAL MANAGEMENT /DE/ reported for SIRIUS XM HOLDINGS, as it reported them
SIRIUS XM HOLDINGS · CONV CUSIP — src ↗	$5.4M	5,147,000 PRN
LIBERTY MEDIA CORP · CONV CUSIP — src ↗	$2.9M	2,500,000 PRN

ticker not yet mapped

$8.3M

7,647,000 PRN

0.2%

—

BOFA FINANCE LLC · CONV CUSIP 09709UV70
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$8.2M

6,800,000 PRN

0.2%

—

WAYFAIR INC

3 positions · 3 reported rows

Rows ADVENT CAPITAL MANAGEMENT /DE/ reported for WAYFAIR INC, as it reported them
WAYFAIR INC · CONV CUSIP — src ↗	$4.1M	3,048,000 PRN
WAYFAIR INC · CONV CUSIP — src ↗	$3.8M	2,183,000 PRN
Wayfair Inc · COM CUSIP — src ↗	$156K	2,073

ticker not yet mapped

$8.1M

—

0.2%

—

IONIS PHARMACEUTICALS IN · CONV CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$7.8M

5,132,000 PRN

0.2%

—

CAPITAL SOUTHWEST CORP · CONV CUSIP 140501AE7
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$7.4M

7,206,000 PRN

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)

Microsoft Corp · COM · CALL CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

$7.4M

20,000

0.2%

—

SHAKE SHACK INC · CONV CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$6.9M

7,272,000 PRN

0.2%

—

EVERGY INC · CONV CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$6.9M

5,025,000 PRN

0.2%

—

SEAGATE HDD CAYMAN · CONV CUSIP 81180WBL4
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$6.8M

1,427,000 PRN

0.2%

—

CLOUDFLARE INC · CONV CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$6.8M

5,778,000 PRN

0.2%

—

BLACKSTONE MORTGAGE TR · CONV CUSIP 09257WAE0
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$6.4M

6,398,000 PRN

0.2%

—

UNITY SOFTWARE INC · CONV CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$6.2M

6,413,000 PRN

0.2%

—

ALBEMARLE CORP · CONV PFD CUSIP —
2026-03-31 filed 2026-05-07 +37d

src ↗

ticker not yet mapped

$5.8M

81,297

0.2%

1–20 of the 100 issuers on this page

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: 52.6%below median 80.0%
integer Herfindahl–Hirschman index in basis points over disclosed position values: 167 bpsbelow median 446 bps
holdings with no disclosed value (undisclosed, or unreadable on the filing) — kept and counted, never shown as zero: 215 / 215median book 97.5 positions

273 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 ADVENT CAPITAL MANAGEMENT /DE/'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.