13F Insight
DOSSIER · 13F-HR · Q1 2026

MACKAY SHIELDS LLC

MACKAY SHIELDS's asset manager based in Stamford, CT — $2.7B in tracked AUM across 307 positions as of Q1 2026.

MS
MACKAY SHIELDS·Stamford, CT·Asset Manager
CIK 0000061227 · last filed Mar 31, 2026
Total AUM
$2.7B
▼ 13.7%
vs prior
Holdings
307
—
positions
Whale Score
54
54
tracked
Activity
—
no data
changes this Q
Top sector
Tech
18% weight
concentration
AI Analysis · Q1 2026 · Q1 2026

MACKAY SHIELDS LLC filed its latest 13F-HR for Q1 2026. See the latest holdings and position changes below.

Quarter at a glance — Q1 2026

Position-change comparison pending.

No quarter-over-quarter changes available.

Top 10 holdings

By portfolio weight as of Q1 2026.

#HoldingValueSharesWeight
01
LITE 0.5 06/15/28
LUMENTUM HLDGS INC
$144M26.8M5.3%
02
WDC 3 11/15/28
WESTERN DIGITAL CORP
$111M15.5M4.1%
03
AEIS 2.5 09/15/28
ADVANCED ENERGY INDS
$95M39.6M3.5%
04
MIRM 4 05/01/29
MIRUM PHARMACEUTICALS INC
$69M23.1M2.5%
05$65M1.2M2.4%
06
LNTH 2.625 12/15/27
LANTHEUS HLDGS INC
$61M50.9M2.2%
07$60M36.5M2.2%
08
CABO 1.125 03/15/28
CABLE ONE INC
$58M77.4M2.1%
09
TTEK 2.25 08/15/28
TETRA TECH INC NEW
$57M54.5M2.1%
10
90353TAM2
UBER TECHNOLOGIES INC
$55M45.4M2.0%

Filing history

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