§ 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
| # | Ticker | Name | Shares | $ value | % port | Δ Q4 |
|---|---|---|---|---|---|---|
| 1 | LITE 0.5 06/15/28 | LUMENTUM HLDGS INC | 28.48M | $80.9T | 2.8% | ±0% |
| 2 | WDC 3 11/15/28 | WESTERN DIGITAL CORP | 14.26M | $65.4T | 2.3% | — |
| 3 | AEIS 2.5 09/15/28 | ADVANCED ENERGY INDS | 38.19M | $62.7T | 2.2% | +683% |
| 4 | MIRM 4 05/01/29 | MIRUM PHARMACEUTICALS INC | 22.79M | $58.9T | 2.1% | −2% |
| 5 | LNTH 2.625 12/15/27 | LANTHEUS HLDGS INC | 49.12M | $56.4T | 2.0% | — |
| 6 | QXO 5.5 05/15/28 | QXO INC | 1.01M | $56.3T | 2.0% | — |
| 7 | TTEK 2.25 08/15/28 | TETRA TECH INC NEW | 51.41M | $55.9T | 2.0% | — |
| 8 | BA 6 10/15/27 | BOEING CO | 686K | $47.7T | 1.7% | +554% |
| 9 | UBER 0.875 12/01/28 2028 | UBER TECHNOLOGIES INC | 36.11M | $46.9T | 1.6% | ±0% |
| 10 | POST 2.5 08/15/27 | POST HLDGS INC | 43.17M | $46.6T | 1.6% | +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.
Read the full dossier →§ 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