§ 13F · FUND PROFILE
MACKAY SHIELDS LLC.
Institutional filer · behavioral pattern: Other. Summary pending.
AUM · $2.9B (13F)Positions · 354Turnover · — · Q1Filed · Apr 27, 2026
CONCENTRATION
—
Top 10 holdings
NEW BUYS
0
+$131M deployed
EXITS
0
No exits
SECTOR SHIFT
—
No prior quarter data
3YR HIT RATE
—
Top-5 overlap
§ 01 · TOP HOLDINGS
The book · Q1 2026
FILED APR 27, 2026
| # | Ticker | Name | Shares | $ value | % port | Δ Q1 |
|---|---|---|---|---|---|---|
| 1 | LITE 0.5 06/15/28 | LUMENTUM HLDGS INC | 25.41M | $136M | 5.0% | −11% |
| 2 | WDC 3 11/15/28 | WESTERN DIGITAL CORP | 12.66M | $91M | 3.3% | −18% |
| 3 | AEIS 2.5 09/15/28 | ADVANCED ENERGY INDS | 33.25M | $80M | 2.9% | −11% |
| 4 | MIRM 4 05/01/29 | MIRUM PHARMACEUTICALS INC | 20.43M | $61M | 2.2% | −10% |
| 5 | QXO 5.5 05/15/28 | QXO INC | 1.01M | $57M | 2.1% | ±0% |
| 6 | MKSI 1.25 06/01/30 | MKS INC. | 32.17M | $53M | 2.0% | ±0% |
| 7 | LNTH 2.625 12/15/27 | LANTHEUS HLDGS INC | 43.27M | $52M | 1.9% | −10% |
| 8 | TTEK 2.25 08/15/28 | TETRA TECH INC NEW | 46.29M | $49M | 1.8% | −9% |
| 9 | BA 6 10/15/27 | BOEING CO | 686K | $45M | 1.6% | ±0% |
| 10 | UBER 0.875 12/01/28 2028 | UBER TECHNOLOGIES INC | 36.11M | $43M | 1.6% | +6% |
§ 02 · SECTOR ALLOCATION
Where the money is
Sector data pending
§ 03 · THE MACKAY SIGNAL
AC read
MACKAY SHIELDS LLC is a Other fund managing $2.9 billion in assets. The fund runs a broad portfolio of 354 positions.
Read the full dossier →§ 04 · FILING HISTORY
Q-by-Q deltas
2 FILINGS
Q1 2026
Steady book
+0 buys · −0 exits · 0 changed
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