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Mackay Shields LLC

SEC CIK
0000061227
Latest filing
Jul 28, 2026

Holdings in Q1 2026

Holdings as of Mar 31, 2026, filed Apr 27, 2026. Long positions only; changes compare share counts with Q4 2025.

Institution overview
Positions
111
−21 vs. Q4 2025
Portfolio value
$2.73B
−$129.9M (−4.5%) vs. Q4 2025
Filed
Apr 27, 2026
SEC
Holdings of Mackay Shields LLC in Q1 2026
SecurityClassSharesValue% of portfolioShare changeActionHistory
Lumentum Hldgs Inc55024UAF6NOTE 0.500% 6/1–$143.6M5.3%–––
Western Digital Corp958102AT2NOTE 3.000%11/1–$110.8M4.1%–––
Advanced Energy Inds007973AE0NOTE 2.500% 9/1–$95.4M3.5%–––
Mirum Pharmaceuticals, Inc.604749AB7NOTE 4.000% 5/0–$69.0M2.5%–––
QXO.PBQXO, Inc.5.50 DEP PFD1,170,361$65.3M2.4%−798−0.1%ReducedHistory
Lantheus Hldgs Inc516544AB9NOTE 2.625%12/1–$61.2M2.2%–––
MKS Inc55306NAB0NOTE 1.250% 6/0–$60.4M2.2%–––
Cable One, Inc.12685JAG0NOTE 1.125% 3/1–$58.4M2.1%–––
Tetra Tech Inc88162GAB9DBCV 2.250% 8/1–$57.2M2.1%–––
Uber Technologies, Inc90353TAM2NOTE 0.875%12/0–$54.6M2.0%–––
BA.PABoeing CoDEP CONV PFD A829,414$53.9M2.0%−683−0.1%ReducedHistory
On Semiconductor Corp682189AS4NOTE 5/0–$50.6M1.9%–––
PG&E Corp69331CAL2NOTE 4.250%12/0–$48.1M1.8%–––
Post Hldgs Inc737446AT1NOTE 2.500% 8/1–$43.6M1.6%–––
Integer Hldgs Corp45826HAD1DBCV 1.875% 3/1–$43.3M1.6%–New–
Apollo Global Mgmt Inc03769M304SER A MAND CNV713,809$42.0M1.5%−483−0.1%Reduced–
Liberty Media Corp531229AQ5NOTE 2.250% 8/1–$39.3M1.4%–––
Akamai Technologies Inc00971TAL5NOTE 0.375% 9/0–$39.2M1.4%–––
HPE.PCHewlett Packard Enterprise Co7.625 MAND CONV601,856$39.0M1.4%+3,993+0.7%AddedHistory
Snowflake Inc.833445AB5NOTE 10/0–$38.5M1.4%–––
NCL Corp Ltd62886HBD2NOTE 1.125% 2/1–$38.0M1.4%–––
BridgeBio Pharma, Inc.10806XAD4NOTE 2.250% 2/0–$37.4M1.4%–––
Northern Oil & Gas, Inc.665531AJ8NOTE 3.625% 4/1–$36.6M1.3%–––
Freshpet, Inc.358039AB1NOTE 3.000% 4/0–$36.6M1.3%–––
iRhythm Holdings, Inc.450056AB2NOTE 1.500% 9/0–$35.8M1.3%–––
BTTBlackRock Municipal 2030 Target Term TrustCOM SHS BEN IN1,566,262$35.6M1.3%+202,135+14.8%AddedHistory
Chefs Whse Inc163086AE1NOTE 2.375%12/1–$35.1M1.3%–––
IAUiShares Gold TrustETF390,150$34.4M1.3%−84,850−17.9%ReducedHistory
MCHPPMicrochip Technology IncDEP SHS REPSTG601,047$34.3M1.3%−427−0.1%ReducedHistory
Burlington Stores, Inc.122017AD8NOTE 1.250%12/1–$33.7M1.2%–––
Patk703343AG812/01/2028–$33.2M1.2%–––
Datadog, Inc.23804LAD5NOTE 12/0–$32.8M1.2%–––
Fluor Corp343412AJ1NOTE 1.125% 8/1–$32.5M1.2%–––
Live Nation Entertainment IN538034BC2NOTE 2.875% 1/1–$32.1M1.2%–––
Etsy Inc29786AAJ5NOTE 0.125%10/0–$32.0M1.2%–––
Seagate HDD Cayman81180WBL4NOTE 3.500% 6/0–$31.5M1.2%–––
ORCL.PDOracle Corp6.5 DEP CUM SR D646,846$29.7M1.1%+646,846NewHistory
Dexcom Inc252131AM9NOTE 0.375% 5/1–$27.6M1.0%–––
Meritage Homes CORP59001ABF8NOTE 1.750% 5/1–$27.2M1.0%–––
Unity Software Inc.91332UAH4NOTE 3/1–$26.8M1.0%–New–
Nutanix, Inc.67059NAK4NOTE 0.500%12/1–$26.8M1.0%–––
NEE.PSNextera Energy IncUNIT 06/01/2027472,936$26.7M1.0%+9,591+2.1%AddedHistory
Peloton Interactive, Inc.70614WAD2NOTE 5.500%12/0–$26.0M1.0%–New–
Parsons Corp70202LAD4NOTE 2.625% 3/0–$25.8M0.9%–––
Biomarin Pharmaceutical Inc09061GAK7NOTE 1.250% 5/1–$25.6M0.9%–––
Progress Software Corp743312AD2NOTE 3.500% 3/0–$25.6M0.9%–––
Liberty Media Corp531229AP7NOTE 3.750% 3/1–$25.5M0.9%–––
Affirm Hldgs Inc00827BAD8NOTE 0.750%12/1–$25.5M0.9%–––
NINENine Energy Service, Inc.COMMON STOCK3,066,434$25.1M0.9%+3,066,434NewHistory
Guidewire Software, Inc.40171VAC4NOTE 1.250%11/0–$25.1M0.9%–––
Bank of Amer Corp0605056827.25%CNV PFD L20,867$24.9M0.9%−60−0.3%Reduced–
Dropbox, Inc.26210CAD6NOTE 3/0–$23.1M0.8%–––
MYNBlackRock Muniyield New York Quality Fund, Inc.COM2,349,687$22.6M0.8%+1,175,516+100.1%AddedHistory
MHDBlackRock Muniholdings Fund, Inc.COM1,982,355$22.4M0.8%−183,915−8.5%ReducedHistory
Greenbrier Cos Inc393657AM3NOTE 2.875% 4/1–$22.0M0.8%–––
TALOTalos Energy Inc.COM1,329,097$20.9M0.8%−1,679,338−55.8%ReducedHistory
GPORGulfport Energy CorpCOMMON SHARES98,592$20.9M0.8%−10,000−9.2%ReducedHistory
Rivian Automotive, Inc.76954AAB9NOTE 4.625% 3/1–$19.9M0.7%–––
Alnylam Pharmaceuticals, Inc.02043QAB3NOTE 1.000% 9/1–$19.1M0.7%–––
SHIFT4 PMTS Inc82452JAD1NOTE 0.500% 8/0–$18.4M0.7%–––
Upstart Hldgs Inc91680MAF4NOTE 1.000%11/1–$17.9M0.7%–––
ARES.PBAres Management Corp6.75 SE B PFD480,034$17.8M0.7%+6,989+1.5%AddedHistory
MQYBlackRock Muniyield Quality Fund, Inc.COM1,594,019$17.5M0.6%+1,236,182+345.5%AddedHistory
WFC.PLWells Fargo & CompanyPERP PFD CNV A14,760$17.1M0.6%−10−0.1%ReducedHistory
SYNAPTICS Inc87157DAJ8NOTE 0.750%12/0–$16.8M0.6%–––
Jazz Investments I Ltd472145AF8NOTE 2.000% 6/1–$15.9M0.6%–––
Workiva Inc98139AAD7NOTE 1.250% 8/1–$15.8M0.6%–––
Ionis Pharmaceuticals Inc462222AF7NOTE 1.750% 6/1–$15.7M0.6%–––
Lumentum Hldgs Inc55024UAD1NOTE 0.500%12/1–$15.6M0.6%–––
Cheesecake Factory Inc163072AA9NOTE 0.375% 6/1–$15.2M0.6%–––
MGP Ingredients Inc55303JAB2NOTE 1.875%11/1–$13.8M0.5%–––
BILL Holdings, Inc.090043AF7NOTE 4/0–$13.5M0.5%–––
MUJBlackRock Muniholdings New Jersey Quality Fund, Inc.COM1,147,932$13.3M0.5%−84,941−6.9%ReducedHistory
Q2 Hldgs Inc74736LAD1NOTE 0.750% 6/0–$13.2M0.5%–––
AeroVironment Inc008073AA6NOTE 7/1–$13.0M0.5%–––
Global PMTS Inc37940XAU6NOTE 1.500% 3/0–$11.4M0.4%–––
Vertex, Inc.92538JAB2NOTE 0.750% 5/0–$8.00M0.3%–––
Spectrum Brands Inc84762LAZ8NOTE 3.375% 6/0–$7.86M0.3%–––
MIYBlackRock Muniyield Michigan Quality Fund, Inc.COM658,969$7.83M0.3%−5,850−0.9%ReducedHistory
Teladoc Health, Inc.87918AAF2NOTE 1.250% 6/0–$7.20M0.3%–––
Live Nation Entertainment IN538034BA6NOTE 3.125% 1/1–$7.18M0.3%–––
Osi Systems Inc671044AF2NOTE 2.250% 8/0–$6.93M0.3%–––
Cloudflare, Inc.18915MAC1NOTE 8/1–$6.65M0.2%–––
GLDSPDR Gold TrustETF15,336$6.60M0.2%00.0%UnchangedHistory
Wec Energy Group, Inc.92939UAR7NOTE 4.375% 6/0–$6.51M0.2%–––
NBHNeuberger Municipal Fund Inc.COM623,277$6.33M0.2%−610,301−49.5%ReducedHistory
Southern Co842587DZ7NOTE 4.500% 6/1–$6.26M0.2%–––
WBDWarner Bros. Discovery, Inc.Stock226,250$6.21M0.2%00.0%UnchangedHistory
Halozyme Therapeutics, Inc.40637HAD1NOTE 0.250% 3/0–$5.62M0.2%–––
MYIBlackRock Muniyield Quality Fund III, Inc.COM526,256$5.53M0.2%+526,256NewHistory
Five9, Inc.338307AF8NOTE 1.000% 3/1–$5.47M0.2%–––
NRKNuveen New York Amt-Free Quality Municipal Income FundCOM519,880$5.31M0.2%−121,225−18.9%ReducedHistory
Nutanix, Inc.67059NAH1NOTE 0.250%10/0–$4.69M0.2%–––
Integer Hldgs Corp45826HAB5NOTE 2.125% 2/1–$4.54M0.2%–––
VFLabrdn National Municipal Income FundCEF401,695$4.00M0.1%00.0%UnchangedHistory
Arrowhead Pharmaceuticals IN04280AAC4NOTE 1/1–$3.11M0.1%–New–
VGMInvesco Trust for Investment Grade MunicipalsCOM209,167$2.06M0.1%−99,376−32.2%ReducedHistory
VKQInvesco Municipal TrustCOM208,814$1.99M0.1%−116,293−35.8%ReducedHistory
MFMAberdeen Municipal Income FundSH BEN INT333,155$1.80M0.1%−6,502−1.9%ReducedHistory
MUCBlackRock Muniholdings California Quality Fund, Inc.CEF146,840$1.53M0.1%−834,486−85.0%ReducedHistory

Sold out since Q4 2025 (28)

Positions held at the end of Q4 2025 that are gone from this filing.

Positions of Mackay Shields LLC sold out since Q4 2025
SecurityClassShares in Q4 2025Value in Q4 2025% of portfolio in Q4 2025History
Ford MTR Co Del345370CZ1NOTE 3/1–$31.3M1.1%–
Tyler Tex Indpt SCH Dist902252AB1NOTE 0.250% 3/1–$30.7M1.1%–
Cable One, Inc.12685JAE5NOTE 3/1–$24.7M0.9%–
Impinj Inc453204AD1NOTE 1.125% 5/1–$16.1M0.6%–
MHNBlackRock Muniholdings New York Quality Fund, Inc.COM1,191,469$12.2M0.4%History
Rapid7, Inc.753422AH7NOTE 1.250% 3/1–$11.7M0.4%–
MQTBlackRock Muniyield Quality Fund II, Inc.COM1,008,573$10.1M0.4%History
Haemonetics Corp Mass405024AB6NOTE 3/0–$8.41M0.3%–
BFKBlackRock Municipal Income TrustSH BEN INT833,784$8.36M0.3%History
MVFBlackRock Munivest Fund, Inc.COM1,192,311$8.26M0.3%History
Amphastar Pharmaceuticals IN03209RAB9NOTE 2.000% 3/1–$8.10M0.3%–
MYDBlackRock Muniyield Fund, Inc.COM697,362$7.32M0.3%History
Expedia Group, Inc.30212PBE4NOTE 2/1–$6.86M0.2%–
CONMED Corp207410AH4NOTE 2.250% 6/1–$6.69M0.2%–
Dropbox, Inc.26210CAC8NOTE 3/0–$5.58M0.2%–
Vail Resorts Inc91879QAN9NOTE 1/0–$5.40M0.2%–
BYMBlackRock Municipal Income Quality TrustCOM479,613$5.25M0.2%History
Bentley Sys Inc08265TAB5NOTE 0.125% 1/1–$4.34M0.2%–
Oil STS Intl Inc678026AK1NOTE 4.750% 4/0–$4.15M0.1%–
BLEBlackRock Municipal Income Trust IICOM363,951$3.80M0.1%History
Ionis Pharmaceuticals Inc462222AD2NOTE 4/0–$3.79M0.1%–
BlackRock New York Municipal Income Trust09248L106SH BEN INT218,559$2.22M0.1%–
State Street SPDR Bloomberg Convertible Securities ETF78464A359ETF13,633$1.22M<0.1%–
BKNBlackRock Investment Quality Municipal Trust, Inc.COM92,077$1.03M<0.1%History
KTFDWS Municipal Income TrustCOM92,505$840.9K<0.1%History
TPBTurning Point Brands, Inc.COM6,802$737.3K<0.1%History
MVTBlackRock Munivest Fund II, Inc.COM65,678$710.0K<0.1%History
VPVInvesco Pennsylvania Value Municipal Income TrustCOM14,433$151.0K<0.1%History