MACKAY SHIELDS LLC Diversified Active

Location: New York, NY

CIK: 0000061227 · Show all filings

Period: Q3 2026 (← Previous)

Filing Date: Oct 13, 2026

Total Value: $2.758B (27.0% shares, 73.0% debt)

Holdings (103)

New Positions (9)

Increased Positions (23)

— CLOUDFLARE INC 2.4%
Value $66.07M (+109.7%) Shares 41,867,000 (+68.3%) Share Price $1.58 Est. Cost/Share $1.39 Unrealized @ Report Date —
— SNOWFLAKE INC 2.9%
Value $79.64M (+47.1%) Shares 36,870,000 (+13.3%) Share Price $2.16 Est. Cost/Share $1.57 Unrealized @ Report Date —
— REVOLUTION MEDICINES INC 2.3%
Value $62.79M (+64.9%) Shares 48,743,000 (+60.6%) Share Price $1.29 Est. Cost/Share $1.27 Unrealized @ Report Date —
— GUIDEWIRE SOFTWARE INC 1.4%
Value $38.79M (+61.8%) Shares 39,638,000 (+59.1%) Share Price $0.98 Est. Cost/Share $1.06 Unrealized @ Report Date —
— ARES MANAGEMENT CORPORATION 1.1%
Value $29.35M (+62.1%) Shares 766,553 (+59.8%) Share Price $38.29 Est. Cost/Share $49.23 Unrealized @ Report Date —
— RUBRIK INC. 0.9%
Value $25.73M (+69.6%) Shares 21,544,000 (+45.3%) Share Price $1.19 Est. Cost/Share $1.08 Unrealized @ Report Date —
— ORACLE CORP 1.4%
Value $38.81M (+33.3%) Shares 883,365 (+36.8%) Share Price $43.94 Est. Cost/Share $45.41 Unrealized @ Report Date —
— AFFIRM HLDGS INC 1.4%
Value $38.53M (+21.5%) Shares 37,054,000 (+36.7%) Share Price $1.04 Est. Cost/Share $1.08 Unrealized @ Report Date —
— DOORDASH INC 1.1%
Value $30.83M (+26.5%) Shares 32,353,000 (+30.9%) Share Price $0.95 Est. Cost/Share $0.98 Unrealized @ Report Date —
— QXO INC 1.9%
Value $52.23M (-9.0%) Shares 1,407,248 (+20.3%) Share Price $37.11 Est. Cost/Share $56.25 Unrealized @ Report Date —
— UBER TECHNOLOGIES INC 2.1%
Value $59.27M (+9.1%) Shares 51,770,000 (+14.1%) Share Price $1.14 Est. Cost/Share $1.13 Unrealized @ Report Date —
— FRESHPET INC 1.5%
Value $41.08M (+11.2%) Shares 36,464,000 (+14.7%) Share Price $1.13 Est. Cost/Share $1.13 Unrealized @ Report Date —
— MICROCHIP TECHNOLOGY INC. 1.6%
Value $43.05M (-7.3%) Shares 644,345 (+6.8%) Share Price $66.81 Est. Cost/Share $53.85 Unrealized @ Report Date —
— ABERDEEN MUN INCOME FD 0.2%
Value $5.272M (+181.0%) Shares 1,087,087 (+225.6%) Share Price $4.85 Est. Cost/Share $5.44 Unrealized @ Report Date —
— ARROWHEAD PHARMACEUTICALS IN 1.0%
Value $27.84M (+13.7%) Shares 27,193,000 (+32.9%) Share Price $1.02 Est. Cost/Share $1.14 Unrealized @ Report Date —
— PG&E CORP 1.8%
Value $50.45M (+6.1%) Shares 51,400,000 (+10.6%) Share Price $0.98 Est. Cost/Share $1.08 Unrealized @ Report Date —
— HALOZYME THERAPEUTICS INC 0.3%
Value $7.782M (+29.5%) Shares 5,466,000 (+1.1%) Share Price $1.42 Est. Cost/Share $1.15 Unrealized @ Report Date —
— AKAMAI TECHNOLOGIES INC 1.5%
Value $42.15M (+3.2%) Shares 37,876,000 (+11.3%) Share Price $1.11 Est. Cost/Share $1.10 Unrealized @ Report Date —
— IONIS PHARMACEUTICALS INC 0.1%
Value $2.69M (-28.3%) Shares 2,457,000 (+1.8%) Share Price $1.09 Est. Cost/Share $1.04 Unrealized @ Report Date —
— GUARDANT HEALTH INC 0.4%
Value $9.919M (+11.1%) Shares 7,259,000 (+1.1%) Share Price $1.37 Est. Cost/Share $1.24 Unrealized @ Report Date —
— PROGRESS SOFTWARE CORP 1.0%
Value $28.42M (+3.5%) Shares 28,955,000 (+1.3%) Share Price $0.98 Est. Cost/Share $1.08 Unrealized @ Report Date —
— OSI SYSTEMS INC 0.2%
Value $5.536M (-7.4%) Shares 4,533,000 (+1.1%) Share Price $1.22 Est. Cost/Share $1.45 Unrealized @ Report Date —
— SOUTHERN CO 0.2%
Value $5.269M (+8.2%) Shares 5,424,000 (+12.6%) Share Price $0.97 Est. Cost/Share $1.01 Unrealized @ Report Date —

Exited Positions (14)

— LANTHEUS HLDGS INC 2.7%
Value $74M Shares 50,863,000 Share Price $1.45 Est. Cost/Share $1.13 Unrealized @ Report Date —
— CHEFS WHSE INC 1.9%
Value $53.04M Shares 23,710,000 Share Price $2.24 Est. Cost/Share $1.01 Unrealized @ Report Date —
— ETSY INC 1.8%
Value $50.89M Shares 49,886,000 Share Price $1.02 Est. Cost/Share $1.04 Unrealized @ Report Date —
— INTEGER HLDGS CORP 1.6%
Value $43.94M Shares 45,243,000 Share Price $0.97 Est. Cost/Share $0.96 Unrealized @ Report Date —
— APOLLO GLOBAL MGMT INC 1.6%
Value $43.46M Shares 713,153 Share Price $60.94 Est. Cost/Share $54.97 Unrealized @ Report Date —
— JAZZ INVESTMENTS I LTD 1.3%
Value $34.66M Shares 20,318,000 Share Price $1.71 Est. Cost/Share $1.71 Unrealized @ Report Date —
— ADVANCED ENERGY INDS 0.5%
Value $13.23M Shares 4,843,000 Share Price $2.73 Est. Cost/Share $1.05 Unrealized @ Report Date —
WBD WARNER BROS DISCOVERY INC 0.3%
Value $9.546M Shares 358,060 Share Price $26.66 * Est. Cost/Share $18.57 Unrealized @ Report Date +66.7%
— TELADOC HEALTH INC 0.3%
Value $7.314M Shares 7,505,000 Share Price $0.97 Est. Cost/Share $1.12 Unrealized @ Report Date —
— CLOUDFLARE INC 0.3%
Value $7.243M Shares 5,637,000 Share Price $1.28 Est. Cost/Share $1.01 Unrealized @ Report Date —
— FIVE9 INC 0.2%
Value $5.476M Shares 6,155,000 Share Price $0.89 Est. Cost/Share $0.86 Unrealized @ Report Date —
— INTEGER HLDGS CORP 0.2%
Value $4.573M Shares 3,756,000 Share Price $1.22 Est. Cost/Share $1.44 Unrealized @ Report Date —
— ABRDN NATL MUN INCOME FD 0.2%
Value $4.166M Shares 401,695 Share Price $10.37 Est. Cost/Share $13.32 Unrealized @ Report Date —
— CHEGG INC 0.0%
Value $43,034 Shares 45,000 Share Price $0.96 Est. Cost/Share $0.99 Unrealized @ Report Date —

Decreased Positions (7)

Unchanged Positions (64)

— MKS INC. 2.4%
Value $66.91M Shares 36,475,000 Share Price $1.83 Est. Cost/Share $0.99 Unrealized @ Report Date —
— CABLE ONE INC 0.8%
Value $23.34M Shares 89,763,000 Share Price $0.26 Est. Cost/Share $0.77 Unrealized @ Report Date —
— HEWLETT PACKARD ENTERPRISE C 3.6%
Value $98.57M Shares 601,487 Share Price $163.87 Est. Cost/Share $54.39 Unrealized @ Report Date —
NINE NINE ENERGY SERVICE INC 0.8%
Value $22.35M Shares 2,988,165 Share Price $7.48 Est. Cost/Share $8.20 Unrealized @ Report Date -8.8%
— ON SEMICONDUCTOR CORP 1.2%
Value $32.6M Shares 21,969,000 Share Price $1.48 Est. Cost/Share $1.19 Unrealized @ Report Date —
— BOEING CO 1.8%
Value $48.94M Shares 829,048 Share Price $59.03 Est. Cost/Share $63.28 Unrealized @ Report Date —
— UNITY SOFTWARE INC 1.3%
Value $36.18M Shares 26,935,000 Share Price $1.34 Est. Cost/Share $1.00 Unrealized @ Report Date —
— PATRICK INDS INC 0.8%
Value $22.72M Shares 19,038,000 Share Price $1.19 Est. Cost/Share $0.91 Unrealized @ Report Date —
— NEXTERA ENERGY INC 1.7%
Value $45.89M Shares 940,950 Share Price $48.77 Est. Cost/Share $51.86 Unrealized @ Report Date —
— PELOTON INTERACTIVE INC 1.1%
Value $30.69M Shares 21,530,000 Share Price $1.43 Est. Cost/Share $1.37 Unrealized @ Report Date —
— CYBERARK SOFTWARE LTD 1.3%
Value $35.58M Shares 19,004,000 Share Price $1.87 Est. Cost/Share $1.66 Unrealized @ Report Date —
— BURLINGTON STORES INC 0.9%
Value $24.08M Shares 17,598,000 Share Price $1.37 Est. Cost/Share $1.41 Unrealized @ Report Date —
— SYNAPTICS INC 0.7%
Value $20.26M Shares 16,119,000 Share Price $1.26 Est. Cost/Share $1.06 Unrealized @ Report Date —
— BLACKROCK MUNIYIELD N Y QUAL 0.7%
Value $20.58M Shares 2,349,687 Share Price $8.76 Est. Cost/Share $10.57 Unrealized @ Report Date —
— BLACKROCK MUNIHOLDINGS FD IN 0.7%
Value $20.34M Shares 1,982,355 Share Price $10.26 Est. Cost/Share $13.19 Unrealized @ Report Date —
— MERIT MED SYS INC 1.6%
Value $44.18M Shares 38,006,000 Share Price $1.16 Est. Cost/Share $1.08 Unrealized @ Report Date —
— ALPHABET INC 4.3%
Value $120M Shares 2,428,006 Share Price $49.29 Est. Cost/Share $50.53 Unrealized @ Report Date —
— LIVE NATION ENTERTAINMENT IN 1.2%
Value $32.63M Shares 29,737,000 Share Price $1.10 Est. Cost/Share $1.05 Unrealized @ Report Date —
— BRIDGEBIO PHARMA INC 1.2%
Value $34.15M Shares 33,241,000 Share Price $1.03 Est. Cost/Share $0.88 Unrealized @ Report Date —
— BLACKROCK MUNIYILD QULT FD I 0.6%
Value $15.83M Shares 1,594,019 Share Price $9.93 Est. Cost/Share $12.25 Unrealized @ Report Date —
— DROPBOX INC 1.0%
Value $26.98M Shares 24,323,000 Share Price $1.11 Est. Cost/Share $0.95 Unrealized @ Report Date —
— FLUOR CORP 1.2%
Value $32.36M Shares 26,188,000 Share Price $1.24 Est. Cost/Share $1.31 Unrealized @ Report Date —
— LIBERTY MEDIA CORP DEL 1.4%
Value $39.76M Shares 33,914,000 Share Price $1.17 Est. Cost/Share $0.99 Unrealized @ Report Date —
— UPSTART HLDGS INC 0.7%
Value $18.55M Shares 25,168,000 Share Price $0.74 Est. Cost/Share $0.88 Unrealized @ Report Date —
— SIRIUSXM HOLDINGS INC 0.9%
Value $26.07M Shares 24,458,000 Share Price $1.07 Est. Cost/Share $1.23 Unrealized @ Report Date —
— MERITAGE HOMES CORP 1.0%
Value $27M Shares 28,105,000 Share Price $0.96 Est. Cost/Share $0.97 Unrealized @ Report Date —
— POST HLDGS INC 1.4%
Value $39.68M Shares 40,191,000 Share Price $0.99 Est. Cost/Share $1.03 Unrealized @ Report Date —
— GREENBRIER COS INC 0.7%
Value $19.88M Shares 19,032,000 Share Price $1.04 Est. Cost/Share $0.94 Unrealized @ Report Date —
GPOR GULFPORT ENERGY CORP 0.5%
Value $14.67M Shares 97,512 Share Price $150.48 Est. Cost/Share $170.19 Unrealized @ Report Date -11.6%
— ALNYLAM PHARMACEUTICALS INC 0.6%
Value $16.04M Shares 14,813,000 Share Price $1.08 Est. Cost/Share $0.98 Unrealized @ Report Date —
— MIRUM PHARMACEUTICALS INC 0.2%
Value $5.392M Shares 1,959,000 Share Price $2.75 Est. Cost/Share $1.35 Unrealized @ Report Date —
— BLACKROCK MUN TARGET TERM TR 1.6%
Value $42.98M Shares 1,967,980 Share Price $21.84 Est. Cost/Share $23.75 Unrealized @ Report Date —
— NUTANIX INC 0.7%
Value $18.05M Shares 16,565,000 Share Price $1.09 Est. Cost/Share $0.97 Unrealized @ Report Date —
— NORTHERN OIL & GAS INC 1.2%
Value $33.42M Shares 33,280,000 Share Price $1.00 Est. Cost/Share $1.16 Unrealized @ Report Date —
— RIVIAN AUTOMOTIVE INC 0.7%
Value $20.65M Shares 18,738,000 Share Price $1.10 Est. Cost/Share $0.82 Unrealized @ Report Date —
— IRHYTHM HOLDINGS INC 1.3%
Value $34.69M Shares 32,610,000 Share Price $1.06 Est. Cost/Share $1.15 Unrealized @ Report Date —
— PARSONS CORP DEL 0.9%
Value $24.62M Shares 26,167,000 Share Price $0.94 Est. Cost/Share $1.01 Unrealized @ Report Date —
— WELLS FARGO & CO 0.6%
Value $15.95M Shares 14,756 Share Price $1080.88 Est. Cost/Share $1489.39 Unrealized @ Report Date —
— NEXTERA ENERGY INC 0.4%
Value $9.908M Shares 229,887 Share Price $43.10 Est. Cost/Share $47.94 Unrealized @ Report Date —
— BLACKROCK MUNIHLDGS NJ QLTY 0.4%
Value $9.948M Shares 881,952 Share Price $11.28 Est. Cost/Share $13.30 Unrealized @ Report Date —
— NUTANIX INC 0.2%
Value $5.99M Shares 4,611,000 Share Price $1.30 Est. Cost/Share $1.21 Unrealized @ Report Date —
— WEC ENERGY GROUP INC 0.2%
Value $5.719M Shares 5,168,000 Share Price $1.11 Est. Cost/Share $1.23 Unrealized @ Report Date —
— BANK OF AMER CORP 0.9%
Value $25.46M Shares 20,836 Share Price $1222.00 Est. Cost/Share $1416.89 Unrealized @ Report Date —
— LIVE NATION ENTERTAINMENT IN 0.3%
Value $7.663M Shares 4,699,000 Share Price $1.63 Est. Cost/Share $1.20 Unrealized @ Report Date —
— BLACKROCK MUNIYIELD QUALITY 0.2%
Value $4.228M Shares 439,004 Share Price $9.63 Est. Cost/Share $10.51 Unrealized @ Report Date —
— SOUTHERN CO 0.2%
Value $5.651M Shares 5,595,000 Share Price $1.01 Est. Cost/Share $1.11 Unrealized @ Report Date —
— BLACKROCK MUNIYIELD MICH QU 0.2%
Value $5.416M Shares 479,747 Share Price $11.29 Est. Cost/Share $14.50 Unrealized @ Report Date —
— DATADOG INC 1.4%
Value $39.52M Shares 27,438,000 Share Price $1.44 Est. Cost/Share $1.00 Unrealized @ Report Date —
— TETRA TECH INC NEW 2.0%
Value $55.7M Shares 52,404,000 Share Price $1.06 Est. Cost/Share $1.31 Unrealized @ Report Date —
— SPECTRUM BRANDS INC 0.3%
Value $7.79M Shares 7,857,000 Share Price $0.99 Est. Cost/Share $0.91 Unrealized @ Report Date —
— ALPHABET INC 0.4%
Value $12.23M Shares 250,000 Share Price $48.91 Est. Cost/Share $50.39 Unrealized @ Report Date —
— DEXCOM INC 0.8%
Value $21.27M Shares 22,472,000 Share Price $0.95 Est. Cost/Share $0.94 Unrealized @ Report Date —
— WORKIVA INC 0.6%
Value $15.86M Shares 16,585,000 Share Price $0.96 Est. Cost/Share $0.95 Unrealized @ Report Date —
— MGP INGREDIENTS INC NEW 0.5%
Value $14.07M Shares 14,254,000 Share Price $0.99 Est. Cost/Share $1.26 Unrealized @ Report Date —
GLD SPDR GOLD TR ⚠ 0.2%
Value $5.841M Shares 15,336 Share Price $380.84 Est. Cost/Share $114.62 Unrealized @ Report Date +232.2%
— BLACKROCK MUNIHLDNGS CALI 0.0%
Value $1.256M Shares 128,815 Share Price $9.75 Est. Cost/Share $10.75 Unrealized @ Report Date —
— GLOBAL PMTS INC 0.4%
Value $11.46M Shares 12,879,000 Share Price $0.89 Est. Cost/Share $0.95 Unrealized @ Report Date —
— EATON VANCE MUN BD FD 0.0%
Value $1.141M Shares 125,764 Share Price $9.07 Est. Cost/Share $10.17 Unrealized @ Report Date —
— BIOMARIN PHARMACEUTICAL INC 0.9%
Value $25.85M Shares 26,468,000 Share Price $0.98 Est. Cost/Share $1.02 Unrealized @ Report Date —
— SHIFT4 PMTS INC 0.7%
Value $18.38M Shares 19,050,000 Share Price $0.96 Est. Cost/Share $1.08 Unrealized @ Report Date —
— PPL CAP FDG INC 0.0%
Value $526K Shares 500,000 Share Price $1.05 Est. Cost/Share $0.96 Unrealized @ Report Date —
SECR NYLIM ACTIVE ETF TR 0.0%
Value $277K Shares 11,504 Share Price $24.11 Est. Cost/Share $26.14 Unrealized @ Report Date -7.8%
— BLACKLINE INC 0.0%
Value $263K Shares 295,000 Share Price $0.89 Est. Cost/Share $1.07 Unrealized @ Report Date —
WW WW INTL INC 0.0%
Value $222K Shares 14,371 Share Price $15.46 Est. Cost/Share $34.35 Unrealized @ Report Date -55.0%