MACKAY SHIELDS LLC
Sector Allocation
- Technology34.5%$951.3M
- Other23.6%$649.8M
- Industrials9.2%$254.5M
- Healthcare8.0%$220.6M
- Financials6.4%$176.1M
- Utilities4.1%$113.5M
- Consumer Discretionary3.9%$107.2M
- Communication Services3.8%$103.4M
- Consumer Staples3.4%$94.8M
- Energy3.1%$86.8M
AUM History
13fpro.ai/research/fund/mackay-shields-llc-61227
Conviction and streaks
Diversifying · top 10 = 26.7%From the fund's last 12 quarters of 13F filings: positions held longest at size, and names it added to or trimmed several quarters running.
Largest positions — Q3 2026
GOOG
$119.7M- HEWLETT$98.6M
SNOW
$79.6MLITE
$75.0MMKSI
$66.9M- CLOUDFLARE$66.1M
RVMD
$62.8MUBER
$59.3M- TETRA$55.7M
WDC
$52.7MQXO
$52.2MPCG
$50.4MBA
$48.9MNEE
$45.9M- MERIT$44.2M
MCHP
$43.0MBTT
$43.0MAKAM
$42.1MFRPT
$41.1MFWONA
$39.8M
Top 20 stock positions. Options are left out: 13F reports them at the underlying's value.
13fpro.ai/research/fund/mackay-shields-llc-61227
MACKAY SHIELDS LLC 13F holdings — Q3 2026
$2.8B portfolio (-7.6% QoQ) · 103 holdings · Q3 2026 13F · top 10 are 27% of the stock portfolio
$119.7M
4.3% of stocks
+0.0%This quarter-10.1%Since filed2 qtrsHeld- 2
HEWLETT PACKARD ENTERPRISE C - 7.625 MAND CONV
$98.6M
3.6% of stocks
+0.0%This quarter—Since filed—HeldAIQuality—Est. buy— $79.6M
2.9% of stocks
+13%This quarter-6.4%Since filed3+ qtrsHeld$75.0M
2.7% of stocks
-21%This quarter-17.2%Since filed3+ qtrsHeldAIQuality44.4#1,924Est. buyEstimated buy price is Pro: unlock with a free trialTrimmed 2 qtrs in a row$66.9M
2.4% of stocks
+0.0%This quarter-18.3%Since filed3+ qtrsHeld- 6
CLOUDFLARE INC - NOTE 6/1
$66.1M
2.4% of stocks
+68%This quarter—Since filed—HeldAIQuality—Est. buy— $62.8M
2.3% of stocks
+61%This quarter-2.4%Since filed2 qtrsHeld$59.3M
2.1% of stocks
+14%This quarter-7.3%Since filed3+ qtrsHeld- 9
TETRA TECH INC NEW - DBCV 2.250% 8/1
$55.7M
2.0% of stocks
-0.1%This quarter—Since filed—HeldAIQuality—Est. buy— $52.7M
1.9% of stocks
-51%This quarter-6.5%Since filed3+ qtrsHeldAIQualityAI quality score is Pro: unlock with a free trialEst. buyEstimated buy price is Pro: unlock with a free trialTrimmed 2 qtrs in a row
All holdings — MACKAY SHIELDS LLC (Q3 2026)
103 disclosed positions from the Form 13F-HR on SEC EDGAR, with quarter-over-quarter share changes. Largest by value first; the ten above are not repeated.
| # | Company | Held | Source | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 11 | QXO, Inc.note | Consumer Discretionary | $52.2M | 1.9% | 1.41M | +20% | 3+ qtrs | AI quality score is Pro: unlock with a free trial | 13F | |
| 12 | PG&E Corpnote | Utilities | $50.4M | 1.8% | 51.40M | +11% | 3+ qtrs | AI quality score is Pro: unlock with a free trial | 13F | |
| 13 | BOEING COpreferred | Industrials | $48.9M | 1.8% | 829K | +0.0% | 3+ qtrs | AI quality score is Pro: unlock with a free trial | 13F | |
| 14 | NEXTERA ENERGY INClp unit | Utilities | $45.9M | 1.7% | 941K | — | 3+ qtrs | AI quality score is Pro: unlock with a free trial | 13F | |
| 15 | — | MERIT MED SYS INC - NOTE 3.000% 2/0note | — | $44.2M | 1.6% | 38.01M | -0.2% | — | — | 13F |
| 16 | MICROCHIP TECHNOLOGY INC | Technology | $43.0M | 1.6% | 644K | +7% | 3+ qtrs | AI quality score is Pro: unlock with a free trial | 13F | |
| 17 | BlackRock Municipal 2030 Target Term Trust | — | $43.0M | 1.6% | 1.97M | — | 3+ qtrs | AI quality score is Pro: unlock with a free trial | 13F | |
| 18 | AKAMAI TECHNOLOGIES INCnote | Industrials | $42.1M | 1.5% | 37.88M | +11% | 3+ qtrs | AI quality score is Pro: unlock with a free trial | 13F | |
| 19 | Freshpet, Inc.note | Consumer Staples | $41.1M | 1.5% | 36.46M | +15% | 3+ qtrs | AI quality score is Pro: unlock with a free trial | 13F | |
| 20 | Liberty Media Corpnote | Communication Services | $39.8M | 1.4% | 33.91M | +0.1% | 3+ qtrs | AI quality score is Pro: unlock with a free trial | 13F | |
| 21 | Post Holdings, Inc.note | Consumer Staples | $39.7M | 1.4% | 40.19M | +0.1% | 3+ qtrs | AI quality score is Pro: unlock with a free trial | 13F | |
| 22 | Datadog, Inc.note | Technology | $39.5M | 1.4% | 27.44M | — | 3+ qtrs | AI quality score is Pro: unlock with a free trial | 13F | |
| 23 | — | ORACLE CORP - 6.5 DEP CUM SR D | — | $38.8M | 1.4% | 883K | +37% | — | — | 13F |
| 24 | Guidewire Software, Inc.note | Technology | $38.8M | 1.4% | 39.64M | +59% | 3+ qtrs | AI quality score is Pro: unlock with a free trial | 13F | |
| 25 | Affirm Holdings, Inc.note | Financials | $38.5M | 1.4% | 37.05M | +37% | 3+ qtrs | AI quality score is Pro: unlock with a free trial | 13F | |
| 26 | — | UNITY SOFTWARE INC - NOTE 3/1 | — | $36.2M | 1.3% | 26.93M | +0.1% | |||
| 27 | — | CYBERARK SOFTWARE LTD - NOTE 6/1 | — | $35.6M | 1.3% | 19.00M | — | |||
| 28 | $IRTC | iRhythm Holdings, Inc. | Healthcare | $34.7M | 1.3% | 32.61M | +0.0% | |||
| 29 | $BBIO | BridgeBio Pharma, Inc. | Healthcare | $34.1M | 1.2% | 33.24M | -0.1% | |||
| 30 | $NOG | NORTHERN OIL & GAS, INC. | Energy | $33.4M | 1.2% | 33.28M | +0.1% | |||
| 31 | $LYV | Live Nation Entertainment, Inc. | Communication Services | $32.6M | 1.2% | 29.74M | — | |||
| 32 | $ON | ON SEMICONDUCTOR CORP | Technology | $32.6M | 1.2% | 21.97M | +0.1% | |||
| 33 | $FLR | FLUOR CORP | Industrials | $32.4M | 1.2% | 26.19M | +0.1% | |||
| 34 | $ITRI | ITRON, INC. | Technology | $31.7M | 1.1% | 32.88M | New | |||
| 35 | $AXON | AXON ENTERPRISE, INC. | Industrials | $31.5M | 1.1% | 32.00M | New | |||
| 36 | $ETSY | ETSY INC | Industrials | $31.4M | 1.1% | 28.37M | -43% | |||
| 37 | — | DOORDASH INC - NOTE 5/1 | — | $30.8M | 1.1% | 32.35M | +31% | |||
| 38 | $PTON | PELOTON INTERACTIVE, INC. | Consumer Discretionary | $30.7M | 1.1% | 21.53M | +0.1% | |||
| 39 | $ARES | Ares Management Corp | Financials | $29.4M | 1.1% | 767K | +60% | |||
| 40 | $PRGS | PROGRESS SOFTWARE CORP /MA | Technology | $28.4M | 1.0% | 28.95M | +1% | |||
| 41 | — | ARROWHEAD PHARMACEUTICALS IN - NOTE 1/1 | — | $27.8M | 1.0% | 27.19M | +33% | |||
| 42 | $NBIS | Nebius Group N.V. | Technology | $27.4M | 1.0% | 14.82M | New | |||
| 43 | $MTH | Meritage Homes CORP | Industrials | $27.0M | 1.0% | 28.11M | +0.3% | |||
| 44 | $DBX | DROPBOX, INC. | Technology | $27.0M | 1.0% | 24.32M | — | |||
| 45 | — | SIRIUSXM HOLDINGS INC - NOTE 3.750% 3/1 | — | $26.1M | 0.9% | 24.46M | — | |||
| 46 | $BMRN | BIOMARIN PHARMACEUTICAL INC | Healthcare | $25.8M | 0.9% | 26.47M | +0.1% | |||
| 47 | $RBRK | Rubrik, Inc. | Technology | $25.7M | 0.9% | 21.54M | +45% | |||
| 48 | $NVMI | NOVA LTD. | Technology | $25.7M | 0.9% | 18.29M | New | |||
| 49 | $BAC | BANK OF AMERICA CORP /DE/ | Financials | $25.5M | 0.9% | 21K | +0.1% | |||
| 50 | $PSN | PARSONS CORP | Technology | $24.6M | 0.9% | 26.17M | — | |||
| 51 | $BURL | Burlington Stores, Inc. | Consumer Discretionary | $24.1M | 0.9% | 17.60M | +0.4% | |||
| 52 | $CABO | Cable One, Inc. | Communication Services | $23.3M | 0.8% | 89.76M | -0.1% | |||
| 53 | $TEM | Tempus AI, Inc. | Technology | $23.3M | 0.8% | 18.55M | New | |||
| 54 | $PATK | PATRICK INDUSTRIES INC | Industrials | $22.7M | 0.8% | 19.04M | -0.4% | |||
| 55 | $NINE | Nine Energy Service, Inc. | Energy | $22.4M | 0.8% | 2.99M | -0.8% | |||
| 56 | $DXCM | DEXCOM INC | Healthcare | $21.3M | 0.8% | 22.47M | +0.3% | |||
| 57 | — | RIVIAN AUTOMOTIVE INC - NOTE 4.625% 3/1 | — | $20.6M | 0.8% | 18.74M | +0.9% | |||
| 58 | $MYN | BLACKROCK MUNIYIELD NEW YORK QUALITY FUND, INC. | Other | $20.6M | 0.8% | 2.35M | — | |||
| 59 | $MHD | BLACKROCK MUNIHOLDINGS FUND, INC. | Other | $20.3M | 0.7% | 1.98M | — | |||
| 60 | $SYNA | SYNAPTICS Inc | Technology | $20.3M | 0.7% | 16.12M | -0.3% | |||
| 61 | — | GREENBRIER COS INC - NOTE 2.875% 4/1 | — | $19.9M | 0.7% | 19.03M | — | |||
| 62 | $UPST | Upstart Holdings, Inc. | Financials | $18.5M | 0.7% | 25.17M | — | |||
| 63 | $IAU | ISHARES GOLD TRUST | Financials | $18.4M | 0.7% | 236K | -28% | |||
| 64 | $FOUR | Shift4 Payments, Inc. | Industrials | $18.4M | 0.7% | 19.05M | -0.6% | |||
| 65 | $NTNX | Nutanix, Inc. | Technology | $18.0M | 0.7% | 16.57M | — | |||
| 66 | $TALO | TALOS ENERGY INC. | Energy | $16.4M | 0.6% | 1.00M | -14% | |||
| 67 | $ZS | Zscaler, Inc. | Technology | $16.3M | 0.6% | 17.30M | New | |||
| 68 | $ALNY | ALNYLAM PHARMACEUTICALS, INC. | Healthcare | $16.0M | 0.6% | 14.81M | -0.1% | |||
| 69 | $WFC | WELLS FARGO & COMPANY/MN | Financials | $15.9M | 0.6% | 15K | +0.1% | |||
| 70 | $WK | WORKIVA INC | Technology | $15.9M | 0.6% | 16.59M | — | |||
| 71 | $MQY | BLACKROCK MUNIYIELD QUALITY FUND, INC. | Other | $15.8M | 0.6% | 1.59M | — | |||
| 72 | $GPOR | GULFPORT ENERGY CORP | Energy | $14.7M | 0.5% | 98K | — | |||
| 73 | $MGPI | MGP INGREDIENTS INC | Consumer Staples | $14.1M | 0.5% | 14.25M | +0.1% | |||
| 74 | $BILL | BILL Holdings, Inc. | Technology | $12.6M | 0.5% | 14.94M | -1% | |||
| 75 | $EEFT | EURONET WORLDWIDE, INC. | Financials | $12.5M | 0.5% | 14.66M | New | |||
| 76 | — | ALPHABET INC - DEP SHS RP1/20 B | — | $12.2M | 0.4% | 250K | — | |||
| 77 | $PI | IMPINJ INC | Technology | $11.5M | 0.4% | 11.05M | New | |||
| 78 | $GPN | GLOBAL PAYMENTS INC | Financials | $11.5M | 0.4% | 12.88M | — | |||
| 79 | $MUJ | BLACKROCK MUNIHOLDINGS NEW JERSEY QUALITY FUND, INC. | Other | $9.9M | 0.4% | 882K | — | |||
| 80 | $GH | Guardant Health, Inc. | Healthcare | $9.9M | 0.4% | 7.26M | +1% | |||
| 81 | — | NEXTERA ENERGY INC - UNIT 02/15/2029 | — | $9.9M | 0.4% | 230K | +0.4% | |||
| 82 | $VERX | Vertex, Inc. | Technology | $8.1M | 0.3% | 9.05M | -1% | |||
| 83 | $LIF | Life360, Inc. | Technology | $7.9M | 0.3% | 8.77M | -1% | |||
| 84 | $SPB | Spectrum Brands Holdings, Inc. | Technology | $7.8M | 0.3% | 7.86M | — | |||
| 85 | $HALO | HALOZYME THERAPEUTICS, INC. | Healthcare | $7.8M | 0.3% | 5.47M | +1% | |||
| 86 | $LYV | Live Nation Entertainment, Inc. | Communication Services | $7.7M | 0.3% | 4.70M | +0.5% | |||
| 87 | $NTNX | Nutanix, Inc. | Technology | $6.0M | 0.2% | 4.61M | +0.6% | |||
| 88 | $GLD | SPDR GOLD TRUST | Financials | $5.8M | 0.2% | 15K | — | |||
| 89 | $WEC | WEC ENERGY GROUP, INC. | Utilities | $5.7M | 0.2% | 5.17M | +0.1% | |||
| 90 | $SO | SOUTHERN CO | Utilities | $5.7M | 0.2% | 5.59M | +0.5% | |||
| 91 | $OSIS | OSI SYSTEMS INC | Technology | $5.5M | 0.2% | 4.53M | +1% | |||
| 92 | $MIY | BLACKROCK MUNIYIELD MICHIGAN QUALITY FUND, INC. | Other | $5.4M | 0.2% | 480K | — | |||
| 93 | $MIRM | Mirum Pharmaceuticals, Inc. | Healthcare | $5.4M | 0.2% | 1.96M | +0.6% | |||
| 94 | $MFM | ABERDEEN MUNICIPAL INCOME FUND | — | $5.3M | 0.2% | 1.09M | +226% | |||
| 95 | $SO | SOUTHERN CO | Utilities | $5.3M | 0.2% | 5.42M | +13% | |||
| 96 | $MYI | BLACKROCK MUNIYIELD QUALITY FUND III, INC. | Other | $4.2M | 0.1% | 439K | — | |||
| 97 | $IONS | IONIS PHARMACEUTICALS INC | Healthcare | $2.7M | 0.1% | 2.46M | +2% | |||
| 98 | $MUC | BLACKROCK MUNIHOLDINGS CALIFORNIA QUALITY FUND, INC. | Other | $1.3M | 0.1% | 129K | — | |||
| 99 | $EIM | Eaton Vance Municipal Bond Fund | Other | $1.1M | 0.0% | 126K | — | |||
| 100 | $PPL | PPL Corp | Utilities | $526K | 0.0% | 500K | — | |||
| 101 | — | NYLIM ACTIVE ETF TR - MACKAY SECURITI | — | $277K | 0.0% | 12K | — | |||
| 102 | $BL | BLACKLINE, INC. | Technology | $263K | 0.0% | 295K | — | |||
| 103 | $WW | WW INTERNATIONAL, INC. | Consumer Discretionary | $222K | 0.0% | 14K | — |
What changed in Q3 2026
Against the previous quarter's 13F: 8 new, 49 added to, 17 trimmed, 13 sold out. Share-count changes; largest moves by dollar size first.
New positions (8)
$ITRIITRON, INC.$31.7M
first bought this quarter
$AXONAXON ENTERPRISE, INC.$31.5M
first bought this quarter
$NBISNebius Group N.V.$27.4M
first bought this quarter
$NVMINOVA LTD.$25.7M
first bought this quarter
$TEMTempus AI, Inc.$23.3M
first bought this quarter
$ZSZscaler, Inc.$16.3M
first bought this quarter
+2 more in the Excel export
Added to (49)
- CLOUDFLARE INC - NOTE 6/1+68%
now $66.1M
now $62.8M · held 2 qtrs, 2 adds in a row
$GWREGuidewire Software, Inc.+59%
now $38.8M · held 3+ qtrs
$ARESAres Management Corp+60%
now $29.4M · held 3+ qtrs
- ORACLE CORP - 6.5 DEP CUM SR D+37%
now $38.8M
$AFRMAffirm Holdings, Inc.+37%
now $38.5M · held 3+ qtrs
+43 more in the Excel export
Trimmed (17)
now $52.7M · held 3+ qtrs, 2 trims in a row
$ETSYETSY INC-43%
now $31.4M · held 3+ qtrs
now $75.0M · held 3+ qtrs, 2 trims in a row
$IAUISHARES GOLD TRUST-28%
now $18.4M · held 3+ qtrs, 2 trims in a row
$TALOTALOS ENERGY INC.-14%
now $16.4M · held 3+ qtrs, 2 trims in a row
$NINENine Energy Service, Inc.-0.8%
now $22.4M · held 3+ qtrs
+11 more in the Excel export
Sold out (13)
$LNTHLantheus Holdings, Inc.was $74.0M
held 7+ qtrs
$CHEFChefs' Warehouse, Inc.was $53.0M
held 7+ qtrs
- INTEGER HLDGS CORP - DBCV 1.875% 3/1was $43.9M
$APOApollo Global Management, Inc.was $43.5M
held 7+ qtrs
- JAZZ INVESTMENTS I LTD - NOTE 3.125% 9/1was $34.7M
$AEISADVANCED ENERGY INDUSTRIES INCwas $13.2M
+7 more in the Excel export
Holdings by quarter
Every 13F MACKAY SHIELDS LLC has filed, 40 earlier quarters. Pick one to see what it held then.
Is it too late to follow MACKAY SHIELDS?
Q3 2026 13F filed with the SEC on Oct 13, 2026. Prices are closing prices as of Oct 26, 2026.
Average quality of MACKAY SHIELDS's top 20 holdings: 62/100 (our AI quality score, weighted by position size; 18 of the 20 are scored)
Top 10 since filing
-8.3%
Value-weighted move of the 10 largest stock positions
Turnover
12%
Last quarter
Top 10 weight
27%
Share of the stock portfolio in its 10 largest positions
Held 4+ quarters
0%
Share of portfolio value in positions held a year or more
Highest-quality names it owns(among its 100 largest positions)
The 8 highest-scoring companies in this portfolio are a Pro feature.
How these are measured
- Moves since the quarter-end and since the filing date use our own daily closing prices, from the close on (or just before) each date to the latest close.
- Turnover is the lesser of shares bought or sold in a quarter, valued at the quarter-end prices in the 13F, divided by the average of the two quarters' stock portfolio values.
- Quarters held and add/trim streaks count back only through quarters whose filed holdings add up to the filing's own cover-page total (back to Q1 2026 for this fund). A change counts as an add or a trim when the split-adjusted share count moves by more than 1%.
- Estimate, not the fund's reported cost. For each quarter in the current holding period in which the fund's share count rose (split-adjusted), we take that quarter's average daily close and weight it by the shares added; sales do not change an average cost. Quarters where the stock's price history and the 13F's own implied price disagree by more than 2x are left out.
- Put and call option rows report the value of the underlying shares, not a position the fund paid for, so they are left out of all of the above.
Portfolio Overview
MACKAY SHIELDS LLC disclosed 103 positions worth $2.8B in its Form 13F-HR for Q3 2026, led by $GOOG (Alphabet Inc.) at 4.3% of the equity portfolio. During the quarter the fund opened 8 new positions and exited 13 — including a new stake in $ITRI and a full exit from $LNTH. The portfolio is most concentrated in Technology (34.5% of disclosed assets). All figures are sourced directly from MACKAY SHIELDS LLC’s Form 13F-HR filing with the SEC under CIK 61227.
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Every holding in MACKAY SHIELDS LLC's portfolio is scored on an AI quality ranking built from its SEC filings (ROIC, FCF margin, revenue growth, institutional flow, earnings quality, shareholder dilution, and more). Track accumulation and distribution quarter over quarter, identify conviction positions, and see AI stock analysis for each position — alongside 8,700+ other institutional filers and 2,800+ AI-ranked companies.