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§ 13F · FUND PROFILE

MACKAY SHIELDS LLC.

Institutional filer · behavioral pattern: Other. Summary pending.
AUM · $3122.2T (13F)Positions · 364Turnover · · Q4Filed · Jan 29, 2026
CONCENTRATION
Top 10 holdings
NEW BUYS
0
+$203.0T deployed
EXITS
0
No exits
SECTOR SHIFT
No prior quarter data
3YR HIT RATE
Top-5 overlap
§ 01 · TOP HOLDINGS

The book · Q4 2025

FILED JAN 29, 2026
#TickerNameShares$ value% portΔ Q4
1LITE 0.5 06/15/28LUMENTUM HLDGS INC28.48M$80.9T2.8%±0%
2WDC 3 11/15/28WESTERN DIGITAL CORP14.26M$65.4T2.3%
3AEIS 2.5 09/15/28ADVANCED ENERGY INDS38.19M$62.7T2.2%+683%
4MIRM 4 05/01/29MIRUM PHARMACEUTICALS INC22.79M$58.9T2.1%−2%
5LNTH 2.625 12/15/27LANTHEUS HLDGS INC49.12M$56.4T2.0%
6QXO 5.5 05/15/28QXO INC1.01M$56.3T2.0%
7TTEK 2.25 08/15/28TETRA TECH INC NEW51.41M$55.9T2.0%
8BA 6 10/15/27BOEING CO686K$47.7T1.7%+554%
9UBER 0.875 12/01/28 2028UBER TECHNOLOGIES INC36.11M$46.9T1.6%±0%
10POST 2.5 08/15/27POST HLDGS INC43.17M$46.6T1.6%+798%
§ 02 · SECTOR ALLOCATION

Where the money is

Sector data pending
§ 03 · THE MACKAY SIGNAL

AC read

MACKAY SHIELDS LLC is a Other fund managing $3122192.2 trillion in assets. The fund runs a broad portfolio of 364 positions.

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§ 04 · FILING HISTORY

Q-by-Q deltas

1 FILINGS
Q4 2025
Steady book
+0 buys · 0 exits · 0 changed
Q3 2025
Steady book
+0 buys · 0 exits · 0 changed
Q2 2025
Steady book
+0 buys · 0 exits · 0 changed
Q1 2025
Steady book
+0 buys · 0 exits · 0 changed