MACKAY SHIELDS LLC

Filed: 7/24/2025ACC: 0001085146-25-004142

📋 What this filing means

MACKAY SHIELDS LLC filed this quarterly 13F‑HR report disclosing 145 equity positions with a total reported market value of $3.12B. This filing provides a transparent view of the manager's long equity holdings as of the quarter end.

145

Positions

$3.12B

Total AUM (reported)

2.06B

Total Shares

Allocation by class

COM$337.52M10.8%

DBCV 2.250% 8/1$72.80M2.3%

NOTE 2.625%12/1$71.04M2.3%

NOTE 2.500% 8/1$66.95M2.1%

NOTE 0.875%12/0$61.78M2.0%

NOTE 9/1$60.65M1.9%

NOTE 4.250%12/0$60.32M1.9%

Portfolio Concentration

Top 3$210.79M6.8%

4–10$406.18M13.0%

11–25$713.73M22.9%

Rest$1.79B57.4%

Top 3 weight

6.8%

Top 10 weight

19.8%

Voting Authority Distribution

Total shares with voting rights: 2.06B

Sole

Full voting authority

154.11M

% of voting shares7.5%

Shared

Joint voting authority

1.91B

% of voting shares92.5%

None

No voting authority

0.00

% of voting shares0.0%

Investment Discretion (by position count)

Sole66

Shared0

Other79

Dominant voting typeShared · 92.5% of voting shares

Institutional Holdings145

Rows:

TETRA TECH INC NEW

OTR

DBCV 2.250% 8/1

Shares64.51M

TypePRN

Market value$72.80M

2.33%

Sole

3.14M

Shared

61.37M

None

0.00

LANTHEUS HLDGS INC

OTR

NOTE 2.625%12/1

Shares55.83M

TypePRN

Market value$71.04M

2.28%

Sole

2.55M

Shared

53.27M

None

0.00

POST HLDGS INC

SOLE

NOTE 2.500% 8/1

Shares58.54M

TypePRN

Market value$66.95M

2.14%

Sole

2.01M

Shared

56.52M

None

0.00

UBER TECHNOLOGIES INC

SOLE

NOTE 0.875%12/0

Shares43.17M

TypePRN

Market value$61.78M

1.98%

Sole

1.98M

Shared

41.19M

None

0.00

PG&E CORP

OTR

NOTE 4.250%12/0

Shares60.65M

TypePRN

Market value$60.32M

1.93%

Sole

2.58M

Shared

58.07M

None

0.00

BOEING CO

OTR

DEP CONV PFD A

Shares845.72K

TypeSH

Market value$57.74M

1.85%

Sole

48.10K

Shared

797.62K

None

0.00

NUTANIX INC

OTR

NOTE 0.250%10/0

Shares40.83M

TypePRN

Market value$57.63M

1.85%

Sole

1.73M

Shared

39.10M

None

0.00

NICE LTD

OTR

NOTE 9/1

Shares58.18M

TypePRN

Market value$57.56M

1.84%

Sole

2.19M

Shared

55.99M

None

0.00

QXO INC

DFND

5.50 DEP PFD

Shares918.70K

TypeSH

Market value$56.57M

1.81%

Sole

44K

Shared

874.70K

None

0.00

APOLLO GLOBAL MGMT INC

DFND

SER A MAND CNV

Shares725.06K

TypeSH

Market value$54.57M

1.75%

Sole

33.35K

Shared

691.71K

None

0.00

ADVANCED ENERGY INDS

OTR

NOTE 2.500% 9/1

Shares45.39M

TypePRN

Market value$54.57M

1.75%

Sole

1.94M

Shared

43.44M

None

0.00

SEAGATE HDD CAYMAN

SOLE

NOTE 3.500% 6/0

Shares30.14M

TypePRN

Market value$54.26M

1.74%

Sole

1.39M

Shared

28.75M

None

0.00

CHEFS WHSE INC

OTR

NOTE 2.375%12/1

Shares34.58M

TypePRN

Market value$53.95M

1.73%

Sole

1.34M

Shared

33.24M

None

0.00

ON SEMICONDUCTOR CORP

DFND

NOTE 5/0

Shares45.18M

TypePRN

Market value$53.64M

1.72%

Sole

2.20M

Shared

42.98M

None

0.00

HALOZYME THERAPEUTICS INC

OTR

NOTE 1.000% 8/1

Shares43.63M

TypePRN

Market value$49.77M

1.59%

Sole

1.76M

Shared

41.86M

None

0.00

MIRUM PHARMACEUTICALS INC

OTR

NOTE 4.000% 5/0

Shares27.89M

TypePRN

Market value$49.51M

1.59%

Sole

1.06M

Shared

26.83M

None

0.00

CABLE ONE INC

SOLE

NOTE 1.125% 3/1

Shares63.03M

TypePRN

Market value$48.22M

1.54%

Sole

22.69M

Shared

40.34M

None

0.00

NEXTERA ENERGY INC

OTR

UNIT 09/01/2025

Shares1.20M

TypeSH

Market value$47.97M

1.54%

Sole

65.09K

Shared

1.14M

None

0.00

LIBERTY MEDIA CORP DEL

SOLE

NOTE 2.250% 8/1

Shares34.61M

TypePRN

Market value$46.07M

1.48%

Sole

1.49M

Shared

33.12M

None

0.00

NUVEEN AMT FREE QLTY MUN INC

SOLE

COM

Shares4M

TypeSH

Market value$43.71M

1.40%

Sole

3.29M

Shared

715.26K

None

0.00

PATRICK INDS INC

DFND

NOTE 1.750%12/0

Shares29.35M

TypePRN

Market value$43.61M

1.40%

Sole

970K

Shared

28.38M

None

0.00

SHIFT4 PMTS INC

OTR

NOTE 0.500% 8/0

Shares40M

TypePRN

Market value$43.00M

1.38%

Sole

1.95M

Shared

38.05M

None

0.00

AKAMAI TECHNOLOGIES INC

OTR

NOTE 0.375% 9/0

Shares43.96M

TypePRN

Market value$42.72M

1.37%

Sole

1.86M

Shared

42.10M

None

0.00

BIOMARIN PHARMACEUTICAL INC

SOLE

NOTE 1.250% 5/1

Shares44.30M

TypePRN

Market value$41.84M

1.34%

Sole

2.25M

Shared

42.05M

None

0.00

MICROCHIP TECHNOLOGY INC.

OTR

DEP SHS REPSTG

Shares612.60K

TypeSH

Market value$40.90M

1.31%

Sole

26.13K

Shared

586.48K

None

0.00

Issuer	Class	Shares	Type	Value / Portfolio %	Voting — Sole	Shared
TETRA TECH INC NEWOTR	DBCV 2.250% 8/1	64.51M	PRN	$72.80M 2.33%	3.14M	61.37M
LANTHEUS HLDGS INCOTR	NOTE 2.625%12/1	55.83M	PRN	$71.04M 2.28%	2.55M	53.27M
POST HLDGS INCSOLE	NOTE 2.500% 8/1	58.54M	PRN	$66.95M 2.14%	2.01M	56.52M
UBER TECHNOLOGIES INCSOLE	NOTE 0.875%12/0	43.17M	PRN	$61.78M 1.98%	1.98M	41.19M
PG&E CORPOTR	NOTE 4.250%12/0	60.65M	PRN	$60.32M 1.93%	2.58M	58.07M
BOEING COOTR	DEP CONV PFD A	845.72K	SH	$57.74M 1.85%	48.10K	797.62K
NUTANIX INCOTR	NOTE 0.250%10/0	40.83M	PRN	$57.63M 1.85%	1.73M	39.10M
NICE LTDOTR	NOTE 9/1	58.18M	PRN	$57.56M 1.84%	2.19M	55.99M
QXO INCDFND	5.50 DEP PFD	918.70K	SH	$56.57M 1.81%	44K	874.70K
APOLLO GLOBAL MGMT INCDFND	SER A MAND CNV	725.06K	SH	$54.57M 1.75%	33.35K	691.71K
ADVANCED ENERGY INDSOTR	NOTE 2.500% 9/1	45.39M	PRN	$54.57M 1.75%	1.94M	43.44M
SEAGATE HDD CAYMANSOLE	NOTE 3.500% 6/0	30.14M	PRN	$54.26M 1.74%	1.39M	28.75M
CHEFS WHSE INCOTR	NOTE 2.375%12/1	34.58M	PRN	$53.95M 1.73%	1.34M	33.24M
ON SEMICONDUCTOR CORPDFND	NOTE 5/0	45.18M	PRN	$53.64M 1.72%	2.20M	42.98M
HALOZYME THERAPEUTICS INCOTR	NOTE 1.000% 8/1	43.63M	PRN	$49.77M 1.59%	1.76M	41.86M
MIRUM PHARMACEUTICALS INCOTR	NOTE 4.000% 5/0	27.89M	PRN	$49.51M 1.59%	1.06M	26.83M
CABLE ONE INCSOLE	NOTE 1.125% 3/1	63.03M	PRN	$48.22M 1.54%	22.69M	40.34M
NEXTERA ENERGY INCOTR	UNIT 09/01/2025	1.20M	SH	$47.97M 1.54%	65.09K	1.14M
LIBERTY MEDIA CORP DELSOLE	NOTE 2.250% 8/1	34.61M	PRN	$46.07M 1.48%	1.49M	33.12M
NUVEEN AMT FREE QLTY MUN INCSOLE	COM	4M	SH	$43.71M 1.40%	3.29M	715.26K
PATRICK INDS INCDFND	NOTE 1.750%12/0	29.35M	PRN	$43.61M 1.40%	970K	28.38M
SHIFT4 PMTS INCOTR	NOTE 0.500% 8/0	40M	PRN	$43.00M 1.38%	1.95M	38.05M
AKAMAI TECHNOLOGIES INCOTR	NOTE 0.375% 9/0	43.96M	PRN	$42.72M 1.37%	1.86M	42.10M
BIOMARIN PHARMACEUTICAL INCSOLE	NOTE 1.250% 5/1	44.30M	PRN	$41.84M 1.34%	2.25M	42.05M
MICROCHIP TECHNOLOGY INC.OTR	DEP SHS REPSTG	612.60K	SH	$40.90M 1.31%	26.13K	586.48K

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