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Mackay Shields LLC

SEC CIK
0000061227
Latest filing
Jul 28, 2026

Holdings in Q4 2023

Holdings as of Dec 31, 2023, filed Feb 2, 2024. Long positions only; changes compare share counts with Q3 2023.

Institution overview
Positions
139
+2 vs. Q3 2023
Portfolio value
$3.43B
−$207.5M (−5.7%) vs. Q3 2023
Filed
Feb 2, 2024
SEC
Holdings of Mackay Shields LLC in Q4 2023
SecurityClassSharesValue% of portfolioShare changeActionHistory
GPORGulfport Energy CorpCOMMON SHARES1,066,363$142.0M4.1%−366,878−25.6%ReducedHistory
NICE Ltd.653656AB4NOTE 9/1–$103.3M3.0%–––
Pioneer Nat Res Co723787AP2NOTE 0.250% 5/1–$89.1M2.6%–––
DISH Network CORP25470MAD1NOTE 2.375% 3/1–$88.8M2.6%–––
Microchip Technology Inc595017AU8NOTE 0.125%11/1–$85.9M2.5%–––
NRG Energy, Inc.629377CG5DBCV 2.750% 6/0–$81.0M2.4%–––
Biomarin Pharmaceutical Inc09061GAK7NOTE 1.250% 5/1–$78.4M2.3%–––
Palo Alto Networks Inc697435AF2NOTE 0.375% 6/0–$77.4M2.3%–––
Exact Sciences Corp30063PAC9NOTE 0.375% 3/0–$71.0M2.1%–––
Ford MTR Co Del345370CZ1NOTE 3/1–$69.9M2.0%–––
Southwest Airls Co844741BG2NOTE 1.250% 5/0–$64.8M1.9%–––
Lantheus Hldgs Inc516544AB9NOTE 2.625%12/1–$64.3M1.9%–New–
Vail Resorts Inc91879QAN9NOTE 1/0–$61.2M1.8%–––
CONMED Corp207410AH4NOTE 2.250% 6/1–$56.7M1.7%–––
MGP Ingredients Inc55303JAB2NOTE 1.875%11/1–$56.2M1.6%–––
Oil STS Intl Inc678026AK1NOTE 4.750% 4/0–$55.0M1.6%–––
Lumentum Hldgs Inc55024UAD1NOTE 0.500%12/1–$54.7M1.6%–––
Patk703343AG812/01/2028–$49.6M1.4%–––
Nextera Energy Inc65339F713UNIT 09/01/20251,258,553$48.1M1.4%+595,780+89.9%Added–
Zillow Group, Inc.98954MAH4NOTE 2.750% 5/1–$46.5M1.4%–––
TALOTalos Energy Inc.COM3,152,973$44.9M1.3%00.0%UnchangedHistory
Square Inc852234AF0NOTE 0.125% 3/0–$44.2M1.3%–––
Dexcom Inc252131AK3NOTE 0.250%11/1–$44.0M1.3%–––
Splunk Inc848637AD6NOTE 1.125% 9/1–$43.3M1.3%–––
Etsy Inc29786AAN6NOTE 0.250% 6/1–$43.3M1.3%–––
Booking Holdings Inc.09857LAN8NOTE 0.750% 5/0–$42.5M1.2%–––
Apollo Global Mgmt Inc03769M304SER A MAND CNV750,028$42.3M1.2%−352,471−32.0%Reduced–
Halozyme Therapeutics, Inc.40637HAF6NOTE 1.000% 8/1–$42.2M1.2%–––
SHIFT4 PMTS Inc82452JAB5NOTE 12/1–$41.3M1.2%–––
Akamai Technologies Inc00971TAL5NOTE 0.375% 9/0–$40.9M1.2%–––
EQT Corp26884LAK5NOTE 1.750% 5/0–$39.8M1.2%–––
Post Hldgs Inc737446AT1NOTE 2.500% 8/1–$39.1M1.1%–––
Zscaler, Inc.98980GAB8NOTE 0.125% 7/0–$38.7M1.1%–––
Bank of Amer Corp0605056827.25%CNV PFD L31,001$37.4M1.1%−707−2.2%Reduced–
Datadog, Inc.23804LAB9NOTE 0.125% 6/1–$36.9M1.1%–––
Enphase Energy, Inc.29355AAH0NOTE 3/0–$36.5M1.1%–––
IAUiShares Gold TrustETF929,500$36.3M1.1%00.0%UnchangedHistory
Centennial Resource Dev Inc15136AAA0NOTE 3.250% 4/0–$35.4M1.0%–––
DHRDanaher CorpStock150,217$34.8M1.0%00.0%UnchangedHistory
WFC.PLWells Fargo & CompanyPERP PFD CNV A28,711$34.4M1.0%−364−1.3%ReducedHistory
Forum Energy Technologies IN34984VAC4NOTE 9.000% 8/0–$34.0M1.0%–––
Pacira BioSciences, Inc.695127AF7NOTE 0.750% 8/0–$33.0M1.0%–––
Viavi Solutions Inc.925550AB1NOTE 1.000% 3/0–$31.8M0.9%–––
Ionis Pharmaceuticals Inc462222AD2NOTE 4/0–$31.7M0.9%–––
Envestnet, Inc.29404KAG1NOTE 2.625%12/0–$30.5M0.9%–New–
MongoDB, Inc.60937PAD8NOTE 0.250% 1/1–$30.5M0.9%–––
Liberty Media Corp531229AQ5NOTE 2.250% 8/1–$30.2M0.9%–––
BTTBlackRock Municipal 2030 Target Term TrustCOM SHS BEN IN1,401,701$29.2M0.9%00.0%UnchangedHistory
DISH Network CORP25470MAB5NOTE 3.375% 8/1–$29.1M0.8%–––
AES Corp00130H204UNIT 99/99/9999375,335$28.5M0.8%+4,268+1.2%Added–
NCL Corp Ltd62886HAX9NOTE 5.375% 8/0–$28.0M0.8%–––
Chart Inds Inc16115Q4076.75DP CNV PFD B483,194$27.3M0.8%−8,746−1.8%Reduced–
Teladoc Health, Inc.87918AAF2NOTE 1.250% 6/0–$26.6M0.8%–––
Nuvasive Inc670704AJ4NOTE 0.375% 3/1–$26.6M0.8%–––
Haemonetics Corp Mass405024AB6NOTE 3/0–$25.3M0.7%–––
Dropbox, Inc.26210CAD6NOTE 3/0–$25.1M0.7%–––
Integra Lifesciences Hldgs C457985AM1NOTE 0.500% 8/1–$24.0M0.7%–––
Cheesecake Factory Inc163072AA9NOTE 0.375% 6/1–$23.9M0.7%–––
Summit Hotel Pptys Inc866082AA8NOTE 1.500% 2/1–$23.8M0.7%–––
Chefs Whse Inc163086AE1NOTE 2.375%12/1–$23.4M0.7%–New–
Euronet Worldwide, Inc.298736AL3NOTE 0.750% 3/1–$23.1M0.7%–––
Northern Oil & Gas, Inc.665531AJ8NOTE 3.625% 4/1–$22.6M0.7%–New–
Array Technologies, Inc.04271TAB6NOTE 1.000%12/0–$21.9M0.6%–––
FETForum Energy Technologies, Inc.COM980,838$21.7M0.6%−14,357−1.4%ReducedHistory
Royal Caribbean Group780153BQ4NOTE 6.000% 8/1–$20.9M0.6%–––
Snap Inc83304AAH9NOTE 0.125% 3/0–$20.3M0.6%–––
Greenbrier Cos Inc393657AM3NOTE 2.875% 4/1–$19.0M0.6%–––
Wolfspeed, Inc.977852AB8NOTE 0.250% 2/1–$18.7M0.5%–––
Omnicell Com68213NAD1NOTE 0.250% 9/1–$18.5M0.5%–––
BridgeBio Pharma, Inc.10806XAB8NOTE 2.500% 3/1–$17.5M0.5%–––
Snap Inc83304AAF3NOTE 5/0–$17.1M0.5%–––
CHRDChord Energy CorpCOM NEW95,748$15.9M0.5%−8,948−8.5%ReducedHistory
American Airls Group Inc02376RAF9NOTE 6.500% 7/0–$15.9M0.5%–––
Solaredge Technologies, Inc.83417MAD6NOTE 9/1–$15.4M0.4%–––
Okta, Inc.679295AD7NOTE 0.125% 9/0–$12.8M0.4%–––
Ares Capital Corp04010LAW3NOTE 4.625% 3/0–$12.3M0.4%–––
MUJBlackRock Muniholdings New Jersey Quality Fund, Inc.COM1,039,078$11.9M0.3%+36,035+3.6%AddedHistory
Alnylam Pharmaceuticals, Inc.02043QAB3NOTE 1.000% 9/1–$11.8M0.3%–––
MHNBlackRock Muniholdings New York Quality Fund, Inc.COM1,111,764$11.7M0.3%00.0%UnchangedHistory
Parsons Corp70202LAB8NOTE 0.250% 8/1–$11.6M0.3%–––
Pebblebrook Hotel Tr70509VAA8NOTE 1.750%12/1–$11.4M0.3%–––
Impinj Inc453204AD1NOTE 1.125% 5/1–$10.9M0.3%–––
Infinera Corp45667GAE3NOTE 2.500% 3/0–$10.9M0.3%–––
GLDSPDR Gold TrustETF55,336$10.6M0.3%00.0%UnchangedHistory
Helix Energy Solutions Grp I42330PAK3NOTE 6.750% 2/1–$10.5M0.3%–––
InterDigital, Inc.45867GAB7NOTE 2.000% 6/0–$10.4M0.3%–––
MQTBlackRock Muniyield Quality Fund II, Inc.COM992,093$10.3M0.3%00.0%UnchangedHistory
NEANuveen AMT-Free Quality Municipal Income FundCOM930,320$10.2M0.3%00.0%UnchangedHistory
KOSKosmos Energy Ltd.COM1,503,656$10.1M0.3%00.0%UnchangedHistory
Bill Com Hldgs Inc090043AB6NOTE 12/0–$9.85M0.3%–––
Cable One, Inc.12685JAE5NOTE 3/1–$9.26M0.3%–––
Biomarin Pharmaceutical Inc09061GAH4NOTE 0.599% 8/0–$8.94M0.3%–––
Ziff Davis, Inc.48123VAE2NOTE 1.750%11/0–$8.65M0.3%–––
MYNBlackRock Muniyield New York Quality Fund, Inc.COM814,624$8.42M0.2%+271,029+49.9%AddedHistory
MHDBlackRock Muniholdings Fund, Inc.COM676,639$8.06M0.2%+38,023+6.0%AddedHistory
Bentley Sys Inc08265TAB5NOTE 0.125% 1/1–$7.97M0.2%–––
MIYBlackRock Muniyield Michigan Quality Fund, Inc.COM664,819$7.55M0.2%00.0%UnchangedHistory
Dropbox, Inc.26210CAC8NOTE 3/0–$7.29M0.2%–––
NCL Corp Ltd62886HAT8NOTE 6.000% 5/1–$7.13M0.2%–––
Uber Technologies, Inc90353TAJ9NOTE 12/1–$6.99M0.2%–––

Sold out since Q3 2023 (12)

Positions held at the end of Q3 2023 that are gone from this filing.

Positions of Mackay Shields LLC sold out since Q3 2023
SecurityClassShares in Q3 2023Value in Q3 2023% of portfolio in Q3 2023History
Chart Inds Inc16115QAE0NOTE 1.000%11/1–$48.8M1.3%–
FLRFluor CorpStock848,588$31.1M0.9%History
JetBlue Airways Corp477143AP6NOTE 0.500% 4/0–$7.24M0.2%–
Liberty Media Corp Del531229AB8NOTE 1.375%10/1–$4.58M0.1%–
Spirit Airls Inc848577AB8NOTE 1.000% 5/1–$3.52M0.1%–
iShares Iboxx $ Investment Grade Corporate Bond ETF464287242ETF14,280$1.46M<0.1%–
iShares Tr464288588MBS ETF9,050$803.6K<0.1%–
iShares Tr4642886613 7 YR TREAS BD3,080$348.5K<0.1%–
NBONeuberger Berman New York Municipal Fund Inc.COM25,745$225.5K<0.1%History
iShares Tr46428743220 YR TR BD ETF2,535$224.8K<0.1%–
Exact Sciences Corp30063PAB1NOTE 0.375% 3/1–$147.4K<0.1%–
Carnival Corp143658BT8NOTE 5.750%10/0–$28.5K<0.1%–