MACKAY SHIELDS LLC Diversified Active

Location: New York, NY

CIK: 0000061227 · Show all filings

Period: Q1 2026 (← Previous) (Next →)

Filing Date: Apr 27, 2026

Total Value: $2.728B (22.7% shares, 77.3% debt)

Holdings (111)

— LUMENTUM HLDGS INC 5.3%
Value $144M Shares 26,786,000 Share Price $5.36 Est. Cost/Share $0.97 Unrealized @ Report Date —
— WESTERN DIGITAL CORP 4.1%
Value $111M Shares 15,476,000 Share Price $7.16 Est. Cost/Share $1.32 Unrealized @ Report Date —
— ADVANCED ENERGY INDS 3.5%
Value $95.38M Shares 39,644,000 Share Price $2.41 Est. Cost/Share $1.05 Unrealized @ Report Date —
— MIRUM PHARMACEUTICALS INC 2.5%
Value $68.96M Shares 23,054,000 Share Price $2.99 Est. Cost/Share $1.35 Unrealized @ Report Date —
— QXO INC 2.4%
Value $65.26M Shares 1,170,361 Share Price $55.76 Est. Cost/Share $60.15 Unrealized @ Report Date —
— LANTHEUS HLDGS INC 2.2%
Value $61.2M Shares 50,898,000 Share Price $1.20 Est. Cost/Share $1.13 Unrealized @ Report Date —
— MKS INC. 2.2%
Value $60.4M Shares 36,510,000 Share Price $1.65 Est. Cost/Share $0.99 Unrealized @ Report Date —
— CABLE ONE INC 2.1%
Value $58.37M Shares 77,359,000 Share Price $0.75 Est. Cost/Share $0.79 Unrealized @ Report Date —
— TETRA TECH INC NEW 2.1%
Value $57.18M Shares 54,518,000 Share Price $1.05 Est. Cost/Share $1.31 Unrealized @ Report Date —
— UBER TECHNOLOGIES INC 2.0%
Value $54.6M Shares 45,352,000 Share Price $1.20 Est. Cost/Share $1.12 Unrealized @ Report Date —
— BOEING CO 2.0%
Value $53.89M Shares 829,414 Share Price $64.97 Est. Cost/Share $63.28 Unrealized @ Report Date —
— ON SEMICONDUCTOR CORP 1.9%
Value $50.6M Shares 39,171,000 Share Price $1.29 Est. Cost/Share $1.19 Unrealized @ Report Date —
— PG&E CORP 1.8%
Value $48.06M Shares 46,384,000 Share Price $1.04 Est. Cost/Share $1.09 Unrealized @ Report Date —
— POST HLDGS INC 1.6%
Value $43.62M Shares 40,228,000 Share Price $1.08 Est. Cost/Share $1.03 Unrealized @ Report Date —
— INTEGER HLDGS CORP 1.6%
Value $43.28M Shares 45,159,000 Share Price $0.96 Est. Cost/Share $0.96 Unrealized @ Report Date —
— APOLLO GLOBAL MGMT INC 1.5%
Value $41.97M Shares 713,809 Share Price $58.80 Est. Cost/Share $54.97 Unrealized @ Report Date —
— LIBERTY MEDIA CORP DEL 1.4%
Value $39.26M Shares 33,972,000 Share Price $1.16 Est. Cost/Share $0.99 Unrealized @ Report Date —
— AKAMAI TECHNOLOGIES INC 1.4%
Value $39.25M Shares 33,819,000 Share Price $1.16 Est. Cost/Share $1.10 Unrealized @ Report Date —
— HEWLETT PACKARD ENTERPRISE C 1.4%
Value $39.02M Shares 601,856 Share Price $64.83 Est. Cost/Share $54.39 Unrealized @ Report Date —
— SNOWFLAKE INC 1.4%
Value $38.52M Shares 32,570,000 Share Price $1.18 Est. Cost/Share $1.49 Unrealized @ Report Date —
— NCL CORP LTD 1.4%
Value $37.98M Shares 38,891,000 Share Price $0.98 Est. Cost/Share $0.93 Unrealized @ Report Date —
— BRIDGEBIO PHARMA INC 1.4%
Value $37.36M Shares 33,315,000 Share Price $1.12 Est. Cost/Share $0.88 Unrealized @ Report Date —
— NORTHERN OIL & GAS INC 1.3%
Value $36.61M Shares 33,296,000 Share Price $1.10 Est. Cost/Share $1.16 Unrealized @ Report Date —
— FRESHPET INC 1.3%
Value $36.58M Shares 31,791,000 Share Price $1.15 Est. Cost/Share $1.13 Unrealized @ Report Date —
— IRHYTHM HOLDINGS INC 1.3%
Value $35.75M Shares 32,631,000 Share Price $1.10 Est. Cost/Share $1.15 Unrealized @ Report Date —
— BLACKROCK MUN TARGET TERM TR 1.3%
Value $35.55M Shares 1,566,262 Share Price $22.70 Est. Cost/Share $24.00 Unrealized @ Report Date —
— CHEFS WHSE INC 1.3%
Value $35.1M Shares 23,749,000 Share Price $1.48 Est. Cost/Share $1.01 Unrealized @ Report Date —
IAU ISHARES GOLD TR 1.3%
Value $34.4M Shares 390,150 Share Price $88.16 Est. Cost/Share $34.57 Unrealized @ Report Date +155.0%
— MICROCHIP TECHNOLOGY INC. 1.3%
Value $34.32M Shares 601,047 Share Price $57.10 Est. Cost/Share $52.97 Unrealized @ Report Date —
— BURLINGTON STORES INC 1.2%
Value $33.73M Shares 20,379,000 Share Price $1.66 Est. Cost/Share $1.41 Unrealized @ Report Date —
— PATRICK INDS INC 1.2%
Value $33.2M Shares 19,136,000 Share Price $1.73 Est. Cost/Share $0.91 Unrealized @ Report Date —
— DATADOG INC 1.2%
Value $32.8M Shares 33,802,000 Share Price $0.97 Est. Cost/Share $1.00 Unrealized @ Report Date —
— FLUOR CORP 1.2%
Value $32.48M Shares 26,312,000 Share Price $1.23 Est. Cost/Share $1.31 Unrealized @ Report Date —
— LIVE NATION ENTERTAINMENT IN 1.2%
Value $32.12M Shares 29,737,000 Share Price $1.08 Est. Cost/Share $1.05 Unrealized @ Report Date —
— ETSY INC 1.2%
Value $32M Shares 32,736,000 Share Price $0.98 Est. Cost/Share $1.05 Unrealized @ Report Date —
— SEAGATE HDD CAYMAN 1.2%
Value $31.54M Shares 6,638,000 Share Price $4.75 Est. Cost/Share $1.44 Unrealized @ Report Date —
— ORACLE CORP 1.1%
Value $29.72M Shares 646,846 Share Price $45.95 Est. Cost/Share $45.95 Unrealized @ Report Date —
— DEXCOM INC 1.0%
Value $27.63M Shares 29,970,000 Share Price $0.92 Est. Cost/Share $0.94 Unrealized @ Report Date —
— MERITAGE HOMES CORP 1.0%
Value $27.2M Shares 28,125,000 Share Price $0.97 Est. Cost/Share $0.97 Unrealized @ Report Date —
— UNITY SOFTWARE INC 1.0%
Value $26.84M Shares 26,902,000 Share Price $1.00 Est. Cost/Share $1.00 Unrealized @ Report Date —
— NUTANIX INC 1.0%
Value $26.81M Shares 29,645,000 Share Price $0.90 Est. Cost/Share $0.97 Unrealized @ Report Date —
— NEXTERA ENERGY INC 1.0%
Value $26.67M Shares 472,936 Share Price $56.39 Est. Cost/Share $50.11 Unrealized @ Report Date —
— PELOTON INTERACTIVE INC 1.0%
Value $26.01M Shares 19,417,000 Share Price $1.34 Est. Cost/Share $1.34 Unrealized @ Report Date —
— PARSONS CORP DEL 0.9%
Value $25.78M Shares 26,133,000 Share Price $0.99 Est. Cost/Share $1.01 Unrealized @ Report Date —
— BIOMARIN PHARMACEUTICAL INC 0.9%
Value $25.56M Shares 26,502,000 Share Price $0.96 Est. Cost/Share $1.02 Unrealized @ Report Date —
— PROGRESS SOFTWARE CORP 0.9%
Value $25.56M Shares 28,693,000 Share Price $0.89 Est. Cost/Share $1.08 Unrealized @ Report Date —
— LIBERTY MEDIA CORP DEL 0.9%
Value $25.48M Shares 24,458,000 Share Price $1.04 Est. Cost/Share $1.23 Unrealized @ Report Date —
— AFFIRM HLDGS INC 0.9%
Value $25.47M Shares 27,150,000 Share Price $0.94 Est. Cost/Share $1.09 Unrealized @ Report Date —
NINE NINE ENERGY SERVICE INC 0.9%
Value $25.14M Shares 3,066,434 Share Price $8.20 Est. Cost/Share $8.20 Unrealized @ Report Date 0.0%
— GUIDEWIRE SOFTWARE INC 0.9%
Value $25.1M Shares 25,147,000 Share Price $1.00 Est. Cost/Share $1.10 Unrealized @ Report Date —
— BANK AMERICA CORP 0.9%
Value $24.88M Shares 20,867 Share Price $1192.54 Est. Cost/Share $1416.89 Unrealized @ Report Date —
— DROPBOX INC 0.8%
Value $23.12M Shares 24,323,000 Share Price $0.95 Est. Cost/Share $0.95 Unrealized @ Report Date —
— BLACKROCK MUNIYIELD N Y QUAL 0.8%
Value $22.56M Shares 2,349,687 Share Price $9.60 Est. Cost/Share $10.57 Unrealized @ Report Date —
— BLACKROCK MUNIHOLDINGS FD IN 0.8%
Value $22.36M Shares 1,982,355 Share Price $11.28 Est. Cost/Share $13.19 Unrealized @ Report Date —
— GREENBRIER COS INC 0.8%
Value $22.05M Shares 19,032,000 Share Price $1.16 Est. Cost/Share $0.94 Unrealized @ Report Date —
TALO TALOS ENERGY INC 0.8%
Value $20.95M Shares 1,329,097 Share Price $15.76 Est. Cost/Share $32.68 Unrealized @ Report Date -51.8%
GPOR GULFPORT ENERGY CORP 0.8%
Value $20.86M Shares 98,592 Share Price $211.57 Est. Cost/Share $170.19 Unrealized @ Report Date +24.3%
— RIVIAN AUTOMOTIVE INC 0.7%
Value $19.94M Shares 18,587,000 Share Price $1.07 Est. Cost/Share $0.82 Unrealized @ Report Date —
— ALNYLAM PHARMACEUTICALS INC 0.7%
Value $19.05M Shares 14,844,000 Share Price $1.28 Est. Cost/Share $0.98 Unrealized @ Report Date —
— SHIFT4 PMTS INC 0.7%
Value $18.38M Shares 19,532,000 Share Price $0.94 Est. Cost/Share $1.08 Unrealized @ Report Date —
— UPSTART HLDGS INC 0.7%
Value $17.93M Shares 25,168,000 Share Price $0.71 Est. Cost/Share $0.88 Unrealized @ Report Date —
— ARES MANAGEMENT CORPORATION 0.7%
Value $17.81M Shares 480,034 Share Price $37.10 Est. Cost/Share $55.78 Unrealized @ Report Date —
— BLACKROCK MUNIYILD QULT FD I 0.6%
Value $17.5M Shares 1,594,019 Share Price $10.98 Est. Cost/Share $12.25 Unrealized @ Report Date —
— WELLS FARGO & CO 0.6%
Value $17.13M Shares 14,760 Share Price $1160.38 Est. Cost/Share $1489.39 Unrealized @ Report Date —
— SYNAPTICS INC 0.6%
Value $16.76M Shares 16,169,000 Share Price $1.04 Est. Cost/Share $1.06 Unrealized @ Report Date —
— JAZZ INVESTMENTS I LTD 0.6%
Value $15.91M Shares 13,087,000 Share Price $1.22 Est. Cost/Share $1.02 Unrealized @ Report Date —
— WORKIVA INC 0.6%
Value $15.82M Shares 16,850,000 Share Price $0.94 Est. Cost/Share $0.95 Unrealized @ Report Date —
— IONIS PHARMACEUTICALS INC 0.6%
Value $15.71M Shares 10,410,000 Share Price $1.51 Est. Cost/Share $1.04 Unrealized @ Report Date —
— LUMENTUM HLDGS INC 0.6%
Value $15.55M Shares 2,200,000 Share Price $7.07 Est. Cost/Share $1.22 Unrealized @ Report Date —
— CHEESECAKE FACTORY INC 0.6%
Value $15.18M Shares 15,388,000 Share Price $0.99 Est. Cost/Share $0.98 Unrealized @ Report Date —
— MGP INGREDIENTS INC NEW 0.5%
Value $13.76M Shares 14,287,000 Share Price $0.96 Est. Cost/Share $1.26 Unrealized @ Report Date —
— BILL HOLDINGS INC 0.5%
Value $13.47M Shares 15,102,000 Share Price $0.89 Est. Cost/Share $0.92 Unrealized @ Report Date —
— BLACKROCK MUNIHLDGS NJ QLTY 0.5%
Value $13.28M Shares 1,147,932 Share Price $11.57 Est. Cost/Share $13.30 Unrealized @ Report Date —
— Q2 HLDGS INC 0.5%
Value $13.23M Shares 13,281,000 Share Price $1.00 Est. Cost/Share $1.18 Unrealized @ Report Date —
— AEROVIRONMENT INC 0.5%
Value $12.96M Shares 13,220,000 Share Price $0.98 Est. Cost/Share $1.18 Unrealized @ Report Date —
— GLOBAL PMTS INC 0.4%
Value $11.37M Shares 12,879,000 Share Price $0.88 Est. Cost/Share $0.95 Unrealized @ Report Date —
— VERTEX INC 0.3%
Value $7.996M Shares 9,185,000 Share Price $0.87 Est. Cost/Share $1.20 Unrealized @ Report Date —
— SPECTRUM BRANDS INC 0.3%
Value $7.861M Shares 7,857,000 Share Price $1.00 Est. Cost/Share $0.91 Unrealized @ Report Date —
— BLACKROCK MUNIYIELD MICH QU 0.3%
Value $7.829M Shares 658,969 Share Price $11.88 Est. Cost/Share $14.50 Unrealized @ Report Date —
— TELADOC HEALTH INC 0.3%
Value $7.197M Shares 7,505,000 Share Price $0.96 Est. Cost/Share $1.12 Unrealized @ Report Date —
— LIVE NATION ENTERTAINMENT IN 0.3%
Value $7.179M Shares 4,726,000 Share Price $1.52 Est. Cost/Share $1.20 Unrealized @ Report Date —
— OSI SYSTEMS INC 0.3%
Value $6.93M Shares 4,525,000 Share Price $1.53 Est. Cost/Share $1.45 Unrealized @ Report Date —
— CLOUDFLARE INC 0.2%
Value $6.649M Shares 5,680,000 Share Price $1.17 Est. Cost/Share $1.01 Unrealized @ Report Date —
GLD SPDR GOLD TR 0.2%
Value $6.599M Shares 15,336 Share Price $430.29 Est. Cost/Share $114.62 Unrealized @ Report Date +275.4%
— WEC ENERGY GROUP INC 0.2%
Value $6.514M Shares 5,266,000 Share Price $1.24 Est. Cost/Share $1.23 Unrealized @ Report Date —
— NEUBERGER MUN FD INC 0.2%
Value $6.326M Shares 623,277 Share Price $10.15 Est. Cost/Share $10.29 Unrealized @ Report Date —
— SOUTHERN CO 0.2%
Value $6.265M Shares 5,640,000 Share Price $1.11 Est. Cost/Share $1.11 Unrealized @ Report Date —
WBD WARNER BROS DISCOVERY INC 0.2%
Value $6.213M Shares 226,250 Share Price $27.46 Est. Cost/Share $13.62 Unrealized @ Report Date +101.6%
— HALOZYME THERAPEUTICS INC 0.2%
Value $5.616M Shares 5,416,000 Share Price $1.04 Est. Cost/Share $1.14 Unrealized @ Report Date —
— BLACKROCK MUNIYIELD QUALITY 0.2%
Value $5.531M Shares 526,256 Share Price $10.51 Est. Cost/Share $10.51 Unrealized @ Report Date —
— FIVE9 INC 0.2%
Value $5.466M Shares 6,265,000 Share Price $0.87 Est. Cost/Share $0.86 Unrealized @ Report Date —
— NUVEEN NY AMT FREE 0.2%
Value $5.308M Shares 519,880 Share Price $10.21 Est. Cost/Share $12.77 Unrealized @ Report Date —
— NUTANIX INC 0.2%
Value $4.689M Shares 4,604,000 Share Price $1.02 Est. Cost/Share $1.21 Unrealized @ Report Date —
— INTEGER HLDGS CORP 0.2%
Value $4.541M Shares 3,845,000 Share Price $1.18 Est. Cost/Share $1.44 Unrealized @ Report Date —
— ABRDN NATL MUN INCOME FD 0.1%
Value $4.001M Shares 401,695 Share Price $9.96 Est. Cost/Share $13.32 Unrealized @ Report Date —
— ARROWHEAD PHARMACEUTICALS IN 0.1%
Value $3.111M Shares 3,000,000 Share Price $1.04 Est. Cost/Share $1.04 Unrealized @ Report Date —
— INVESCO TR INVT GRADE MUNS 0.1%
Value $2.064M Shares 209,167 Share Price $9.87 Est. Cost/Share $10.40 Unrealized @ Report Date —
— INVESCO MUNICIPAL TRUST 0.1%
Value $1.988M Shares 208,814 Share Price $9.52 Est. Cost/Share $10.15 Unrealized @ Report Date —
— MFS MUN INCOME TR 0.1%
Value $1.796M Shares 333,155 Share Price $5.39 Est. Cost/Share $6.77 Unrealized @ Report Date —
— BLACKROCK MUNIHLDNGS CALI 0.1%
Value $1.527M Shares 146,840 Share Price $10.40 Est. Cost/Share $10.75 Unrealized @ Report Date —
— NUVEEN PA INVT QUALITY MUN F 0.1%
Value $1.407M Shares 117,934 Share Price $11.93 Est. Cost/Share $14.14 Unrealized @ Report Date —
— EATON VANCE MUN BD FD 0.0%
Value $1.229M Shares 125,764 Share Price $9.77 Est. Cost/Share $10.17 Unrealized @ Report Date —
— INVESCO MUN OPPORTUNIT TR 0.0%
Value $1.201M Shares 126,255 Share Price $9.51 Est. Cost/Share $9.80 Unrealized @ Report Date —
— NUVEEN MUN CR INCOME FD 0.0%
Value $678K Shares 55,659 Share Price $12.18 Est. Cost/Share $12.32 Unrealized @ Report Date —
— BLACKLINE INC 0.0%
Value $598K Shares 635,000 Share Price $0.94 Est. Cost/Share $1.07 Unrealized @ Report Date —
— PPL CAP FDG INC 0.0%
Value $586K Shares 500,000 Share Price $1.17 Est. Cost/Share $0.96 Unrealized @ Report Date —
— DUKE ENERGY CORP NEW 0.0%
Value $552K Shares 500,000 Share Price $1.10 Est. Cost/Share $1.00 Unrealized @ Report Date —
— INVESCO ADVANTAGE MUN INCOME 0.0%
Value $392K Shares 45,320 Share Price $8.66 Est. Cost/Share $8.88 Unrealized @ Report Date —
SECR NEW YORK LIFE INVTS ACTIVE E 0.0%
Value $295K Shares 11,504 Share Price $25.65 Est. Cost/Share $26.14 Unrealized @ Report Date -1.9%
WW WW INTL INC 0.0%
Value $197K Shares 14,371 Share Price $13.74 Est. Cost/Share $34.35 Unrealized @ Report Date -60.0%
— CHEGG INC 0.0%
Value $43,425 Shares 45,000 Share Price $0.96 Est. Cost/Share $0.99 Unrealized @ Report Date —