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Portfolio (Quarterly) Guide ↗

MACKAY SHIELDS LLC

· CIK 0000061227
13F Portfolio $2.9B AUM 340 positions Filed Jan 29, 2026 EDGAR ↗ ← All Funds
Q4 2025 Q3 2025 · All 10 New 7 Added 91 Reduced 14 Exited
Page 1 of 7  ·  132 positions
# Ticker Company Sector Shares Value ↓ % Port Chg Shares Chg % Period Price ① Since Period ①
1 WESTERN DIGITAL CORP 18,882,000.0 $86.6M 3.03% -346K -1.8% $4.59
2 LUMENTUM HLDGS INC 30,037,000.0 $85.3M 2.99% -408K -1.3% $2.84
3 ADVANCED ENERGY INDS 44,638,000.0 $73.3M 2.56% -536K -1.2% $1.64
4 MIRUM PHARMACEUTICALS INC 25,532,000.0 $66.0M 2.31% -687K -2.6% $2.58
5 LANTHEUS HLDGS INC 56,714,000.0 $65.1M 2.28% +1.0M +1.9% $1.15
6 QXO INC 1,171,159.0 $65.0M 2.28% -15K -1.3% $55.52
7 TETRA TECH INC NEW 59,623,000.0 $64.8M 2.27% +1.0M +1.8% $1.09
8 BOEING CO 830,097.0 $57.7M 2.02% -12K -1.4% $69.47
9 CABLE ONE INC 69,399,000.0 $56.7M 1.98% +2.0M +2.9% $0.82
10 UBER TECHNOLOGIES INC 42,644,000.0 $55.4M 1.94% -347K -0.8% $1.30
11 APOLLO GLOBAL MGMT INC 714,292.0 $53.9M 1.89% -8K -1.1% $75.48
12 POST HLDGS INC 49,514,000.0 $53.4M 1.87% -607K -1.2% $1.08
13 PG&E CORP 51,451,000.0 $53.0M 1.85% -9.0M -14.9% $1.03
14 ON SEMICONDUCTOR CORP 39,380,000.0 $47.0M 1.64% -599K -1.5% $1.19
15 MKS INC. 36,548,000.0 $46.7M 1.63% -637K -1.7% $1.28
16 IRHYTHM TECHNOLOGIES INC 32,682,000.0 $45.7M 1.60% +1.8M +5.9% $1.40
17 SEAGATE HDD CAYMAN 13,293,000.0 $44.7M 1.56% -12.3M -48.0% $3.36
18 SNOWFLAKE INC 29,853,000.0 $44.4M 1.55% +3.5M +13.2% $1.49
19 LIBERTY MEDIA CORP DEL 34,036,000.0 $43.1M 1.51% -397K -1.1% $1.27
20 HEWLETT PACKARD ENTERPRISE C 597,863.0 $39.6M 1.39% -7K -1.2% $66.27
Page 1 of 7  ·  132 positions

Period Price is the implied market price on the last day of the reporting period, calculated as reported value ÷ shares held. It is not the fund's purchase price or cost basis — the fund may have initiated or added to the position at any point during the quarter at a different price. Since Period shows the price change from that quarter-end snapshot to today's last price — it reflects stock movement after the report date, not the fund's actual return.

Sector Allocation
Financial Services 75.3%
Energy 21.8%
Communication Services 2.6%
Consumer Defensive 0.3%