MACKAY SHIELDS LLC

Filed: 4/29/2025ACC: 0001085146-25-002417

📋 What this filing means

MACKAY SHIELDS LLC filed this quarterly 13F‑HR report disclosing 144 equity positions with a total reported market value of $3.11B. This filing provides a transparent view of the manager's long equity holdings as of the quarter end.

144

Positions

$3.11B

Total AUM (reported)

2.10B

Total Shares

Allocation by class

COM$357.74M11.5%

NOTE 2.625%12/1$79.18M2.5%

DBCV 2.750% 6/0$77.44M2.5%

NOTE 3/1$71.58M2.3%

NOTE 2.500% 8/1$70.16M2.3%

DBCV 2.250% 8/1$66.90M2.2%

NOTE 9/1$65.76M2.1%

Portfolio Concentration

Top 3$226.78M7.3%

4–10$406.51M13.1%

11–25$675.65M21.7%

Rest$1.80B57.9%

Top 3 weight

7.3%

Top 10 weight

20.4%

Voting Authority Distribution

Total shares with voting rights: 2.10B

Sole

Full voting authority

151.55M

% of voting shares7.2%

Shared

Joint voting authority

1.95B

% of voting shares92.8%

None

No voting authority

0.00

% of voting shares0.0%

Investment Discretion (by position count)

Sole61

Shared0

Other83

Dominant voting typeShared · 92.8% of voting shares

Institutional Holdings144

Rows:

LANTHEUS HLDGS INC

SOLE

NOTE 2.625%12/1

Shares56.02M

TypePRN

Market value$79.18M

2.55%

Sole

2.55M

Shared

53.47M

None

0.00

NRG ENERGY INC

DFND

DBCV 2.750% 6/0

Shares33.23M

TypePRN

Market value$77.44M

2.49%

Sole

1.43M

Shared

31.80M

None

0.00

POST HLDGS INC

OTR

NOTE 2.500% 8/1

Shares58.75M

TypePRN

Market value$70.16M

2.26%

Sole

2.01M

Shared

56.74M

None

0.00

TETRA TECH INC NEW

OTR

DBCV 2.250% 8/1

Shares64.71M

TypePRN

Market value$66.90M

2.15%

Sole

3.14M

Shared

61.57M

None

0.00

PG&E CORP

OTR

NOTE 4.250%12/0

Shares60.92M

TypePRN

Market value$64.50M

2.07%

Sole

2.58M

Shared

58.34M

None

0.00

NICE LTD

OTR

NOTE 9/1

Shares58.96M

TypePRN

Market value$57.65M

1.85%

Sole

2.66M

Shared

56.30M

None

0.00

HALOZYME THERAPEUTICS INC

OTR

NOTE 1.000% 8/1

Shares43.85M

TypePRN

Market value$56.18M

1.81%

Sole

1.76M

Shared

42.09M

None

0.00

NUTANIX INC

OTR

NOTE 0.250%10/0

Shares41.01M

TypePRN

Market value$54.75M

1.76%

Sole

1.73M

Shared

39.28M

None

0.00

APOLLO GLOBAL MGMT INC

DFND

SER A MAND CNV

Shares728.83K

TypeSH

Market value$53.57M

1.72%

Sole

33.35K

Shared

695.48K

None

0.00

UBER TECHNOLOGIES INC

OTR

NOTE 0.875%12/0

Shares43.37M

TypePRN

Market value$52.98M

1.70%

Sole

1.98M

Shared

41.39M

None

0.00

BIOMARIN PHARMACEUTICAL INC

DFND

NOTE 1.250% 5/1

Shares54.93M

TypePRN

Market value$51.84M

1.67%

Sole

2.96M

Shared

51.97M

None

0.00

NEXTERA ENERGY INC

OTR

UNIT 09/01/2025

Shares1.21M

TypeSH

Market value$49.58M

1.59%

Sole

65.09K

Shared

1.15M

None

0.00

ON SEMICONDUCTOR CORP

OTR

NOTE 0.500% 3/0

Shares56.01M

TypePRN

Market value$48.43M

1.56%

Sole

2.32M

Shared

53.69M

None

0.00

CHEFS WHSE INC

DFND

NOTE 2.375%12/1

Shares34.78M

TypePRN

Market value$48.39M

1.56%

Sole

1.34M

Shared

33.45M

None

0.00

FORD MTR CO

OTR

NOTE 3/1

Shares48.04M

TypePRN

Market value$47.14M

1.52%

Sole

2.73M

Shared

45.31M

None

0.00

ADVANCED ENERGY INDS

OTR

NOTE 2.500% 9/1

Shares45.62M

TypePRN

Market value$46.84M

1.51%

Sole

1.94M

Shared

43.68M

None

0.00

MIRUM PHARMACEUTICALS INC

OTR

NOTE 4.000% 5/0

Shares27.96M

TypePRN

Market value$45.47M

1.46%

Sole

1.06M

Shared

26.90M

None

0.00

NUVEEN AMT FREE QLTY MUN INC

SOLE

COM

Shares4M

TypeSH

Market value$44.83M

1.44%

Sole

3.29M

Shared

715.26K

None

0.00

NCL CORP LTD

SOLE

NOTE 1.125% 2/1

Shares45.15M

TypePRN

Market value$43.93M

1.41%

Sole

1.69M

Shared

43.45M

None

0.00

AKAMAI TECHNOLOGIES INC

OTR

NOTE 0.375% 9/0

Shares44.19M

TypePRN

Market value$43.16M

1.39%

Sole

1.86M

Shared

42.33M

None

0.00

CABLE ONE INC

SOLE

NOTE 1.125% 3/1

Shares53.68M

TypePRN

Market value$42.74M

1.37%

Sole

20.32M

Shared

33.36M

None

0.00

LIBERTY MEDIA CORP DEL

DFND

NOTE 2.250% 8/1

Shares34.81M

TypePRN

Market value$42.37M

1.36%

Sole

1.49M

Shared

33.33M

None

0.00

PATRICK INDS INC

OTR

NOTE 1.750%12/0

Shares29.56M

TypePRN

Market value$41.44M

1.33%

Sole

970K

Shared

28.59M

None

0.00

SHIFT4 PMTS INC

SOLE

NOTE 0.500% 8/0

Shares40M

TypePRN

Market value$40.58M

1.31%

Sole

1.95M

Shared

38.05M

None

0.00

ISHARES GOLD TR

OTR

ISHARES NEW

Shares660K

TypeSH

Market value$38.91M

1.25%

Sole

0.00

Shared

660K

None

0.00

Issuer	Class	Shares	Type	Value / Portfolio %	Voting — Sole	Shared
LANTHEUS HLDGS INCSOLE	NOTE 2.625%12/1	56.02M	PRN	$79.18M 2.55%	2.55M	53.47M
NRG ENERGY INCDFND	DBCV 2.750% 6/0	33.23M	PRN	$77.44M 2.49%	1.43M	31.80M
POST HLDGS INCOTR	NOTE 2.500% 8/1	58.75M	PRN	$70.16M 2.26%	2.01M	56.74M
TETRA TECH INC NEWOTR	DBCV 2.250% 8/1	64.71M	PRN	$66.90M 2.15%	3.14M	61.57M
PG&E CORPOTR	NOTE 4.250%12/0	60.92M	PRN	$64.50M 2.07%	2.58M	58.34M
NICE LTDOTR	NOTE 9/1	58.96M	PRN	$57.65M 1.85%	2.66M	56.30M
HALOZYME THERAPEUTICS INCOTR	NOTE 1.000% 8/1	43.85M	PRN	$56.18M 1.81%	1.76M	42.09M
NUTANIX INCOTR	NOTE 0.250%10/0	41.01M	PRN	$54.75M 1.76%	1.73M	39.28M
APOLLO GLOBAL MGMT INCDFND	SER A MAND CNV	728.83K	SH	$53.57M 1.72%	33.35K	695.48K
UBER TECHNOLOGIES INCOTR	NOTE 0.875%12/0	43.37M	PRN	$52.98M 1.70%	1.98M	41.39M
BIOMARIN PHARMACEUTICAL INCDFND	NOTE 1.250% 5/1	54.93M	PRN	$51.84M 1.67%	2.96M	51.97M
NEXTERA ENERGY INCOTR	UNIT 09/01/2025	1.21M	SH	$49.58M 1.59%	65.09K	1.15M
ON SEMICONDUCTOR CORPOTR	NOTE 0.500% 3/0	56.01M	PRN	$48.43M 1.56%	2.32M	53.69M
CHEFS WHSE INCDFND	NOTE 2.375%12/1	34.78M	PRN	$48.39M 1.56%	1.34M	33.45M
FORD MTR COOTR	NOTE 3/1	48.04M	PRN	$47.14M 1.52%	2.73M	45.31M
ADVANCED ENERGY INDSOTR	NOTE 2.500% 9/1	45.62M	PRN	$46.84M 1.51%	1.94M	43.68M
MIRUM PHARMACEUTICALS INCOTR	NOTE 4.000% 5/0	27.96M	PRN	$45.47M 1.46%	1.06M	26.90M
NUVEEN AMT FREE QLTY MUN INCSOLE	COM	4M	SH	$44.83M 1.44%	3.29M	715.26K
NCL CORP LTDSOLE	NOTE 1.125% 2/1	45.15M	PRN	$43.93M 1.41%	1.69M	43.45M
AKAMAI TECHNOLOGIES INCOTR	NOTE 0.375% 9/0	44.19M	PRN	$43.16M 1.39%	1.86M	42.33M
CABLE ONE INCSOLE	NOTE 1.125% 3/1	53.68M	PRN	$42.74M 1.37%	20.32M	33.36M
LIBERTY MEDIA CORP DELDFND	NOTE 2.250% 8/1	34.81M	PRN	$42.37M 1.36%	1.49M	33.33M
PATRICK INDS INCOTR	NOTE 1.750%12/0	29.56M	PRN	$41.44M 1.33%	970K	28.59M
SHIFT4 PMTS INCSOLE	NOTE 0.500% 8/0	40M	PRN	$40.58M 1.31%	1.95M	38.05M
ISHARES GOLD TROTR	ISHARES NEW	660K	SH	$38.91M 1.25%	0.00	660K

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