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Mackay Shields LLC Top Holdings and 13F Report (2026)

About Mackay Shields LLC

Investment Activity

  • Mackay Shields LLC has $2.76 billion in total holdings as of March 31, 2026.
  • Mackay Shields LLC owns shares of 103 different stocks, but just 54 companies or ETFs make up 80% of its holdings.
  • Approximately 13.74% of the portfolio was purchased this quarter.
  • About 15.85% of the portfolio was sold this quarter.
  • This quarter, Mackay Shields LLC has purchased 108 new stocks and bought additional shares in 49 stocks.
  • Mackay Shields LLC sold shares of 16 stocks and completely divested from 14 stocks this quarter.

Largest Holdings

ALPHABET INC
$119,679,035
HEWLETT PACKARD ENTERPRISE C
$98,565,874
SNOWFLAKE INC
$79,643,653
LUMENTUM HLDGS INC
$74,960,514
MKS INC.
$66,911,605

Largest New Holdings this Quarter

465741AQ9 - ITRON INC
$31,675,258 Holding
05464CAE1 - AXON ENTERPRISE INC
$31,549,624 Holding
29786AAQ9 - ETSY INC
$31,425,999 Holding
63954QAG1 - NEBIUS GROUP N.V.
$27,444,284 Holding
66982MAB0 - NOVA LTD
$25,725,938 Holding

Largest Purchases this Quarter

ITRON INC
32,877,000 shares (about $31.68M)
AXON ENTERPRISE INC
32,000,000 shares (about $31.55M)
ETSY INC
28,370,000 shares (about $31.43M)
NEBIUS GROUP N.V.
14,822,000 shares (about $27.44M)
CLOUDFLARE INC
16,995,000 shares (about $26.82M)

Largest Sales this Quarter

WESTERN DIGITAL CORP
4,549,000 shares (about $54.49M)
LUMENTUM HLDGS INC
2,735,000 shares (about $20.20M)
iShares Gold Trust
92,520 shares (about $7.23M)
Talos Energy
160,126 shares (about $2.61M)
NINE ENERGY SERVICE INC
23,400 shares (about $175.03K)

Sector Allocation Over Time

Map of 500 Largest Holdings ofMackay Shields LLC

 
 
Selling
 
 
Neutral
 
 
Buying
Issuer NameHoldings ValueApproximate Purchase/SaleChange in SharesShares Held% of PortfolioSector
ALPHABET INC
$119,679,035$34,652 ▲0.0%2,428,0064.3%DEP SHS RP1/20 A
HEWLETT PACKARD ENTERPRISE C
$98,565,874$36,707 ▲0.0%601,4873.6%7.625 MAND CONV
SNOWFLAKE INC
$79,643,653$9,351,163 ▲13.3%36,870,0002.9%NOTE 10/0
LUMENTUM HLDGS INC
$74,960,514$20,200,710 ▼-21.2%10,149,0002.7%NOTE 0.500% 6/1
MKS INC.
$66,911,605$9,172 ▲0.0%36,475,0002.4%NOTE 1.250% 6/0
CLOUDFLARE INC
$66,066,689$26,818,339 ▲68.3%41,867,0002.4%NOTE 6/1
REVOLUTION MEDICINES INC
$62,789,138$23,700,990 ▲60.6%48,743,0002.3%NOTE 0.500% 5/0
UBER TECHNOLOGIES INC
$59,265,621$7,333,505 ▲14.1%51,770,0002.1%NOTE 0.875%12/0
TETRA TECH INC NEW
$55,697,192$43,577 ▼-0.1%52,404,0002.0%DBCV 2.250% 8/1
WESTERN DIGITAL CORP
$52,742,022$54,490,906 ▼-50.8%4,403,0001.9%NOTE 3.000%11/1
QXO INC
$52,227,843$8,824,096 ▲20.3%1,407,2481.9%5.50 DEP PFD
PG&E CORP
$50,447,797$4,855,355 ▲10.6%51,400,0001.8%NOTE 4.250%12/0
BOEING CO
$48,941,544$22,079 ▲0.0%829,0481.8%DEP CONV PFD A
NEXTERA ENERGY INC
$45,886,5770.0%940,9501.7%UNIT 06/01/2027
MERIT MED SYS INC
$44,181,975$77,888 ▼-0.2%38,006,0001.6%NOTE 3.000% 2/0
MICROCHIP TECHNOLOGY INC.
$43,049,114$2,729,483 ▲6.8%644,3451.6%DEP SHS REPSTG
Blackrock Municipal 2030 Target Term Trust stock logo
BTT
Blackrock Municipal 2030 Target Term Trust
$42,980,6830.0%1,967,9801.6%Finance
AKAMAI TECHNOLOGIES INC
$42,149,417$4,286,608 ▲11.3%37,876,0001.5%NOTE 0.375% 9/0
FRESHPET INC
$41,079,433$5,254,346 ▲14.7%36,464,0001.5%NOTE 3.000% 4/0
LIBERTY MEDIA CORP DEL
$39,755,751$23,445 ▲0.1%33,914,0001.4%NOTE 2.250% 8/1
POST HLDGS INC
$39,676,730$29,616 ▲0.1%40,191,0001.4%NOTE 2.500% 8/1
DATADOG INC
$39,521,7710.0%27,438,0001.4%NOTE 12/0
ORACLE CORP
$38,814,783$10,438,488 ▲36.8%883,3651.4%6.5 DEP CUM SR D
GUIDEWIRE SOFTWARE INC
$38,786,869$14,410,773 ▲59.1%39,638,0001.4%NOTE 1.250%11/0
AFFIRM HLDGS INC
$38,534,014$10,338,064 ▲36.7%37,054,0001.4%NOTE 0.750%12/1
UNITY SOFTWARE INC
$36,176,082$41,636 ▲0.1%26,935,0001.3%NOTE 3/1
CYBERARK SOFTWARE LTD
$35,584,9900.0%19,004,0001.3%NOTE 6/1
IRHYTHM HOLDINGS INC
$34,686,585$12,764 ▲0.0%32,610,0001.3%NOTE 1.500% 9/0
BRIDGEBIO PHARMA INC
$34,149,525$18,492 ▼-0.1%33,241,0001.2%NOTE 2.250% 2/0
NORTHERN OIL & GAS INC
$33,420,608$39,165 ▲0.1%33,280,0001.2%NOTE 3.625% 4/1
LIVE NATION ENTERTAINMENT IN
$32,633,4750.0%29,737,0001.2%NOTE 2.875% 1/1
ON SEMICONDUCTOR CORP
$32,599,885$29,678 ▲0.1%21,969,0001.2%NOTE 5/0
FLUOR CORP
$32,357,208$25,947 ▲0.1%26,188,0001.2%NOTE 1.125% 8/1
ITRON INC
$31,675,258$31,675,258 ▲New Holding32,877,0001.1%NOTE 1.375% 7/1
AXON ENTERPRISE INC
$31,549,624$31,549,624 ▲New Holding32,000,0001.1%NOTE 9/1
ETSY INC
$31,425,999$31,425,999 ▲New Holding28,370,0001.1%NOTE 1.000% 6/1
DOORDASH INC
$30,831,024$7,283,452 ▲30.9%32,353,0001.1%NOTE 5/1
PELOTON INTERACTIVE INC
$30,688,295$44,187 ▲0.1%21,530,0001.1%NOTE 5.500%12/0
ARES MANAGEMENT CORPORATION
$29,350,281$10,981,875 ▲59.8%766,5531.1%6.75 SE B PFD
PROGRESS SOFTWARE CORP
$28,423,813$358,304 ▲1.3%28,955,0001.0%NOTE 3.500% 3/0
ARROWHEAD PHARMACEUTICALS IN
$27,836,761$6,895,467 ▲32.9%27,193,0001.0%NOTE 1/1
NEBIUS GROUP N.V.
$27,444,284$27,444,284 ▲New Holding14,822,0001.0%NOTE 1.000% 9/1
MERITAGE HOMES CORP
$26,996,591$71,082 ▲0.3%28,105,0001.0%NOTE 1.750% 5/1
DROPBOX INC
$26,979,0450.0%24,323,0001.0%NOTE 3/0
SIRIUSXM HOLDINGS INC
$26,066,1140.0%24,458,0000.9%NOTE 3.750% 3/1
BIOMARIN PHARMACEUTICAL INC
$25,848,726$33,204 ▲0.1%26,468,0000.9%NOTE 1.250% 5/1
RUBRIK INC.
$25,734,309$8,025,846 ▲45.3%21,544,0000.9%NOTE 6/1
NOVA LTD
$25,725,938$25,725,938 ▲New Holding18,294,0000.9%NOTE 9/1
BANK OF AMER CORP
$25,461,536$36,660 ▲0.1%20,8360.9%7.25%CNV PFD L
PARSONS CORP DEL
$24,621,9870.0%26,167,0000.9%NOTE 2.625% 3/0
BURLINGTON STORES INC
$24,082,864$94,427 ▲0.4%17,598,0000.9%NOTE 1.250%12/1
CABLE ONE INC
$23,338,380$32,500 ▼-0.1%89,763,0000.8%NOTE 1.125% 3/1
TEMPUS AI INC
$23,336,294$23,336,294 ▲New Holding18,554,0000.8%NOTE 0.750% 7/1
PATRICK INDS INC
$22,723,986$95,489 ▼-0.4%19,038,0000.8%NOTE 1.750%12/0
NINE ENERGY SERVICE INC
$22,351,475$175,032 ▼-0.8%2,988,1650.8%COMMON STOCK
DEXCOM INC
$21,267,483$53,945 ▲0.3%22,472,0000.8%NOTE 0.375% 5/1
RIVIAN AUTOMOTIVE INC
$20,646,664$174,094 ▲0.9%18,738,0000.7%NOTE 4.625% 3/1
BlackRock MuniYield New York Quality Fund, Inc. stock logo
MYN
BlackRock MuniYield New York Quality Fund
$20,583,2580.0%2,349,6870.7%Finance
BlackRock MuniHoldings Fund, Inc. stock logo
MHD
BlackRock MuniHoldings Fund
$20,338,9620.0%1,982,3550.7%Finance
SYNAPTICS INC
$20,255,336$62,831 ▼-0.3%16,119,0000.7%NOTE 0.750%12/0
GREENBRIER COS INC
$19,884,5040.0%19,032,0000.7%NOTE 2.875% 4/1
UPSTART HLDGS INC
$18,548,8160.0%25,168,0000.7%NOTE 1.000%11/1
iShares Gold Trust stock logo
IAU
iShares Gold Trust
$18,392,550$7,225,812 ▼-28.2%235,5000.7%ETF
SHIFT4 PMTS INC
$18,381,935$103,248 ▼-0.6%19,050,0000.7%NOTE 0.500% 8/0
NUTANIX INC
$18,049,4150.0%16,565,0000.7%NOTE 0.500%12/1
Talos Energy Inc. stock logo
TALO
Talos Energy
$16,391,759$2,614,857 ▼-13.8%1,003,7820.6%Energy
ZSCALER INC
$16,329,468$16,329,468 ▲New Holding17,300,0000.6%NOTE 7/1
ALNYLAM PHARMACEUTICALS INC
$16,039,422$22,739 ▼-0.1%14,813,0000.6%NOTE 1.000% 9/1
WELLS FARGO & CO
$15,949,469$8,647 ▲0.1%14,7560.6%PERP PFD CNV A
WORKIVA INC
$15,859,4060.0%16,585,0000.6%NOTE 1.250% 8/1
BlackRock MuniYield Quality Fund, Inc. stock logo
MQY
BlackRock MuniYield Quality Fund
$15,828,6080.0%1,594,0190.6%Finance
GULFPORT ENERGY CORP
$14,673,6060.0%97,5120.5%COMMON SHARES
MGP INGREDIENTS INC NEW
$14,067,202$10,856 ▲0.1%14,254,0000.5%NOTE 1.875%11/1
BILL HOLDINGS INC
$12,646,395$135,418 ▼-1.1%14,942,0000.5%NOTE 4/0
EURONET WORLDWIDE INC
$12,537,775$12,537,775 ▲New Holding14,660,0000.5%NOTE 0.625%10/0
ALPHABET INC
$12,227,5000.0%250,0000.4%DEP SHS RP1/20 B
IMPINJ INC
$11,524,768$11,524,768 ▲New Holding11,050,0000.4%NOTE 9/1
GLOBAL PMTS INC
$11,455,8710.0%12,879,0000.4%NOTE 1.500% 3/0
BlackRock MuniHoldings New Jersey Quality Fund, Inc. stock logo
MUJ
BlackRock MuniHoldings New Jersey Quality Fund
$9,948,4180.0%881,9520.4%Finance
GUARDANT HEALTH INC
$9,918,587$109,311 ▲1.1%7,259,0000.4%NOTE 11/1
NEXTERA ENERGY INC
$9,908,130$42,410 ▲0.4%229,8870.4%UNIT 02/15/2029
VERTEX INC
$8,050,458$92,534 ▼-1.1%9,048,0000.3%NOTE 0.750% 5/0
LIFE360 INC
$7,943,428$90,575 ▼-1.1%8,770,0000.3%NOTE 6/0
SPECTRUM BRANDS INC
$7,790,3630.0%7,857,0000.3%NOTE 3.375% 6/0
HALOZYME THERAPEUTICS INC
$7,781,911$83,998 ▲1.1%5,466,0000.3%NOTE 0.250% 3/0
LIVE NATION ENTERTAINMENT IN
$7,663,223$37,509 ▲0.5%4,699,0000.3%NOTE 3.125% 1/1
NUTANIX INC
$5,989,689$37,671 ▲0.6%4,611,0000.2%NOTE 0.250%10/0
SPDR Gold Shares stock logo
GLD
SPDR Gold Shares
$5,840,5620.0%15,3360.2%ETF
WEC ENERGY GROUP INC
$5,718,781$6,639 ▲0.1%5,168,0000.2%NOTE 4.375% 6/0
SOUTHERN CO
$5,651,030$26,260 ▲0.5%5,595,0000.2%NOTE 4.500% 6/1
OSI SYSTEMS INC
$5,535,918$58,620 ▲1.1%4,533,0000.2%NOTE 2.250% 8/0
BlackRock MuniYield Michigan Quality Fund, Inc. stock logo
MIY
BlackRock MuniYield Michigan Quality Fund
$5,416,3440.0%479,7470.2%Finance
MIRUM PHARMACEUTICALS INC
$5,392,268$33,031 ▲0.6%1,959,0000.2%NOTE 4.000% 5/0
Mfs Muni Inc Tr stock logo
MFM
Mfs Muni Inc Tr
$5,272,372$3,653,335 ▲225.6%1,087,0870.2%Finance
SOUTHERN CO
$5,269,416$591,644 ▲12.6%5,424,0000.2%NOTE 3.250% 6/1
BlackRock MuniYield Quality Fund III, Inc. stock logo
MYI
BlackRock MuniYield Quality Fund III
$4,227,6080.0%439,0040.2%Finance
IONIS PHARMACEUTICALS INC
$2,689,597$47,071 ▲1.8%2,457,0000.1%NOTE 1.750% 6/1
BlackRock MuniHoldings California Quality Fund, Inc. stock logo
MUC
BlackRock MuniHoldings California Quality Fund
$1,255,9470.0%128,8150.0%Finance
EATON VANCE MUN BD FD
$1,140,6800.0%125,7640.0%COM
PPL CAP FDG INC
$526,1970.0%500,0000.0%NOTE 2.875% 3/1

Showing largest 100 holdings. View all holdings.
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