MACKAY SHIELDS LLC

CIK: 0000061227Latest portfolio: $2.9B · Q4 2025

Holdings

132

Total Value

$2.9B

New Positions

132

Closed Positions

0

#StockSharesValue% PortfolioChangeType
1
WDC 3 11/15/28WESTERN DIGITAL CORP
18,882,000$86.6M3.03%NEW
2
LITE 0.5 06/15/28LUMENTUM HLDGS INC
30,037,000$85.3M2.99%NEW
3
AEIS 2.5 09/15/28ADVANCED ENERGY INDS
44,638,000$73.3M2.56%NEW
4
MIRM 4 05/01/29MIRUM PHARMACEUTICALS INC
25,532,000$66.0M2.31%NEW
5
LNTH 2.625 12/15/27LANTHEUS HLDGS INC
56,714,000$65.1M2.28%NEW
61,171,159$65.0M2.28%NEW
7
TTEK 2.25 08/15/28TETRA TECH INC NEW
59,623,000$64.8M2.27%NEW
8
BA 6 10/15/27BOEING CO
830,097$57.7M2.02%NEW
9
CABO 1.125 03/15/28CABLE ONE INC
69,399,000$56.6M1.98%NEW
10
UBER 0.875 12/01/28 2028UBER TECHNOLOGIES INC
42,644,000$55.4M1.94%NEW
11
APO 6.75 07/31/26APOLLO GLOBAL MGMT INC
714,292$53.9M1.89%NEW
12
POST 2.5 08/15/27POST HLDGS INC
49,514,000$53.4M1.87%NEW
1351,451,000$53.0M1.85%NEW
14
ON 0 05/01/27ON SEMICONDUCTOR CORP
39,380,000$47.0M1.64%NEW
1536,548,000$46.7M1.63%NEW
16
IRTC 1.5 09/01/29IRHYTHM TECHNOLOGIES INC
32,682,000$45.7M1.60%NEW
17
STX 3.5 06/01/28SEAGATE HDD CAYMAN
13,293,000$44.7M1.56%NEW
18
SNOW 0 10/01/27SNOWFLAKE INC
29,853,000$44.4M1.55%NEW
19
FWONK 2.25 08/15/27LIBERTY MEDIA CORP DEL
34,036,000$43.1M1.51%NEW
20
HPE 7.625 09/01/27HEWLETT PACKARD ENTERPRISE C
597,863$39.6M1.39%NEW
2138,891,000$38.9M1.36%NEW
22
IAU*ISHARES GOLD TR
475,000$38.6M1.35%NEW
23
FOUR 0.5 08/01/27SHIFT4 PMTS INC
39,492,000$38.0M1.33%NEW
2437,045,000$37.5M1.31%NEW
25
CHEF 2.375 12/15/28CHEFS WHSE INC
23,784,000$36.2M1.27%NEW

Quarterly Changes

Closed Positions

No closed positions this quarter

Sector Breakdown

UnknownNaN% ($InfinityT)
Technology0.0% ($3.112812483121881e+68T)
Financial Services0.0% ($2.543114670116358e+43T)
Energy0.0% ($3.3T)
Communication Services0.0% ($6.5M)
Consumer Defensive0.0% ($737K)
Consumer Cyclical0.0% ($419K)

Filing History

QuarterFiling DatePortfolio ValueHoldings
Q4 2025Jan 29, 2026$2.9B340
Q3 2025Oct 27, 2025$2.9T0
Q2 2025Jul 24, 2025$3.1T364
Q1 2025Apr 29, 2025$3.1T361
Q4 2024Feb 4, 2025$3.4T367
Q3 2024Oct 31, 2024$3649.0T368
Q2 2024Aug 8, 2024$3289.7T345
Q1 2024May 3, 2024$3607.9T361
Q4 2023Feb 2, 2024$3427.5T360
Q3 2023Oct 25, 2023$3635.0T333
Q2 2023Jul 27, 2023$3577.0T374
Q1 2023Apr 27, 2023$3642.0T386
Q4 2022Jan 31, 2023$3919.4T462
Q3 2022Nov 2, 2022$4.0T466
Q2 2022Aug 3, 2022$4.1T498
Q1 2022May 13, 2022$11.4T1,438
Q4 2021Feb 4, 2022$12.0T1,442
Q3 2021Nov 12, 2021$9.4T1,395
Q2 2021Aug 13, 2021$10.6T1,378
Q1 2021May 14, 2021$13.7T2,988
Q4 2020Feb 16, 2021$14.5T3,172
Q3 2020Nov 4, 2020$14.7T2,990
Q2 2020Jul 31, 2020$12.5T3,079
Q1 2020May 8, 2020$10.8T2,888
Q4 2019Feb 11, 2020$14.5T2,832
Q3 2019Nov 1, 2019$16.4T2,897
Q2 2019Aug 13, 2019$14.7T2,991
Q1 2019May 13, 2019$14.2T2,901
Q4 2018Feb 14, 2019$12.3T2,666
Q3 2018Nov 14, 2018$13.1T1,146
Q2 2018Aug 6, 2018$14.4T2,281
Q1 2018May 3, 2018$16.0T1,313
Q4 2017Jan 24, 2018$2.7T199
Q3 2017Oct 24, 2017$2.7T195
Q2 2017Jul 13, 2017$2.4T166
Q1 2017Apr 20, 2017$2.2T159
Q4 2016Jan 10, 2017$2.1T162
Q3 2016Oct 20, 2016$2.2T159
Q2 2016Jul 25, 2016$2.0T156
Q1 2016Apr 21, 2016$1.8T114

Fund Information

CIK0000061227
Most Recent FilingJan 29, 2026
Number of Filings40

MACKAY SHIELDS LLC is an institutional investment manager that files 13F reports with the SEC. As of the Q4 2025 filing, the fund reported a portfolio valued at $2.9B across 132 holdings. The largest position is WESTERN DIGITAL CORP (WDC 3 11/15/28), representing 3.0% of the portfolio. Compared to the previous quarter, the fund opened 132 new positions and closed 0 positions. 13F filings are required quarterly disclosures that provide transparency into the holdings of institutional investment managers with at least $100 million in qualifying assets.