MCBDX Holdings — MassMutual Core Bond Fund
Data updated: 2026-08-27
MCBDX holds 391 securities. The top 10 make up 17.4% of net assets, led by Uniform Mortgage-Backed Security, TBA (3.63%) and Freddie Mac Pool (2.00%). Mortgage / Securitized (44.0%) and Corporate Bonds (40.0%) are the largest sectors, and 86.8% of the portfolio is in United States. Debt holdings: 210 positions, 45.4% of assets.
Holdings cover 107.05% of net asset value (95.84% of total assets; remainder is cash and receivables). As of June 30, 2026 · N-PORT.
MCBDX Portfolio Holdings
391 holdings of MassMutual Core Bond Fund by percentage of net assets, from the fund's SEC N-PORT filing as of June 30, 2026. The 100 largest are listed below; the interactive table on this page lists all 391.
| Holding | Ticker | Sector | % of net assets | Value (USD) |
|---|---|---|---|---|
| Uniform Mortgage-Backed Security, TBA | — | Mortgage / Securitized | 3.63% | $30.72M |
| Freddie Mac Pool | — | Mortgage / Securitized | 2.00% | $16.95M |
| U.S. Treasury Bonds | — | Government Bonds | 1.98% | $16.76M |
| U.S. Treasury Bonds | — | Government Bonds | 1.79% | $15.18M |
| U.S. Treasury Notes | — | Government Bonds | 1.69% | $14.31M |
| Uniform Mortgage-Backed Security, TBA | — | Mortgage / Securitized | 1.45% | $12.28M |
| State Street Navigator Securities Lending Government Money Market Portfolio | — | Funds & ETFs | 1.35% | $11.45M |
| EIDP Inc | — | Unknown | 1.18% | $9.99M |
| Becton Dickinson & Co | — | Unknown | 1.18% | $9.99M |
| U.S. Treasury Bonds | — | Government Bonds | 1.16% | $9.86M |
| BGME Trust 2021-VR | — | Mortgage / Securitized | 1.05% | $8.88M |
| Fannie Mae Pool | — | Mortgage / Securitized | 0.96% | $8.10M |
| Equifax Inc | — | Unknown | 0.94% | $7.98M |
| Ginnie Mae | — | Mortgage / Securitized | 0.74% | $6.28M |
| Penske Truck Leasing Co LP | — | Unknown | 0.71% | $5.98M |
| Fidus Re Ltd | — | Corporate Bonds | 0.70% | $5.95M |
| Freddie Mac Pool | — | Mortgage / Securitized | 0.70% | $5.89M |
| U.S. Treasury Notes | — | Government Bonds | 0.69% | $5.82M |
| KREF 2021-FL2 Ltd | — | Mortgage / Securitized | 0.68% | $5.79M |
| Fannie Mae Pool | — | Mortgage / Securitized | 0.65% | $5.47M |
| Fannie Mae Pool | — | Mortgage / Securitized | 0.64% | $5.41M |
| Corebridge Financial Inc | — | Corporate Bonds | 0.62% | $5.21M |
| Allianz SE | — | Corporate Bonds | 0.60% | $5.07M |
| Enstar Finance LLC | — | Corporate Bonds | 0.60% | $5.06M |
| OHA Credit Funding 5 Ltd | — | Mortgage / Securitized | 0.59% | $5.01M |
| Evergy Kansas Central Inc | — | Unknown | 0.59% | $5.00M |
| Penske Truck Leasing Co LP | — | Unknown | 0.59% | $4.96M |
| Freddie Mac Pool | — | Mortgage / Securitized | 0.58% | $4.88M |
| Whitebox CLO III Ltd | — | Mortgage / Securitized | 0.56% | $4.75M |
| Tesla Sustainable Energy Trust 2024-1 | — | Mortgage / Securitized | 0.56% | $4.72M |
| Fannie Mae Pool | — | Mortgage / Securitized | 0.54% | $4.60M |
| Fannie Mae Pool | — | Mortgage / Securitized | 0.54% | $4.54M |
| Fannie Mae Pool | — | Mortgage / Securitized | 0.52% | $4.39M |
| Ginnie Mae II Pool | — | Mortgage / Securitized | 0.52% | $4.39M |
| Antares Holdings LP | — | Corporate Bonds | 0.50% | $4.26M |
| Sempra | — | Corporate Bonds | 0.50% | $4.23M |
| Liberty Mutual Group Inc | — | Corporate Bonds | 0.50% | $4.21M |
| Freddie Mac Pool | — | Mortgage / Securitized | 0.50% | $4.21M |
| SLM Student Loan Trust 2008-5 | — | Mortgage / Securitized | 0.49% | $4.14M |
| Rad CLO 6 Ltd | — | Mortgage / Securitized | 0.47% | $4.01M |
| Penske Truck Leasing Co LP | — | Unknown | 0.47% | $3.99M |
| Oracle Corp | — | Unknown | 0.47% | $3.99M |
| Spire Inc | — | Unknown | 0.47% | $3.98M |
| Equifax Inc | — | Unknown | 0.47% | $3.98M |
| Hubbell Inc | — | Unknown | 0.47% | $3.98M |
| Golub Capital BDC Inc | — | Corporate Bonds | 0.46% | $3.89M |
| Fannie Mae Pool | — | Mortgage / Securitized | 0.46% | $3.86M |
| ING Groep NV | — | Corporate Bonds | 0.46% | $3.86M |
| Benchmark 2021-B23 Mortgage Trust | — | Mortgage / Securitized | 0.44% | $3.71M |
| SFS Auto Receivables Securitization Trust 2024-3 | — | Mortgage / Securitized | 0.44% | $3.71M |
| Global Net Lease Inc / Global Net Lease Operating Partnership LP | — | Corporate Bonds | 0.41% | $3.50M |
| KREF 2021-FL2 Ltd | — | Mortgage / Securitized | 0.41% | $3.49M |
| NatWest Group PLC | — | Corporate Bonds | 0.41% | $3.49M |
| Avolon Holdings Funding Ltd | — | Corporate Bonds | 0.40% | $3.39M |
| Ginnie Mae II Pool | — | Mortgage / Securitized | 0.40% | $3.38M |
| CIFC Funding 2018-II Ltd | — | Mortgage / Securitized | 0.40% | $3.36M |
| Ginnie Mae II Pool | — | Mortgage / Securitized | 0.40% | $3.35M |
| Nordea Bank Abp | — | Corporate Bonds | 0.39% | $3.32M |
| JH North America Holdings Inc | — | Corporate Bonds | 0.39% | $3.32M |
| Vitality Re XV Ltd | — | Corporate Bonds | 0.39% | $3.30M |
| Fannie Mae Pool | — | Mortgage / Securitized | 0.39% | $3.29M |
| LEX 2024-BBG Mortgage Trust | — | Mortgage / Securitized | 0.39% | $3.29M |
| SBA Tower Trust | — | Corporate Bonds | 0.38% | $3.25M |
| Ginnie Mae II Pool | — | Mortgage / Securitized | 0.38% | $3.22M |
| KREF 2021-FL2 Ltd | — | Mortgage / Securitized | 0.38% | $3.19M |
| Bank of America Corp | — | Corporate Bonds | 0.37% | $3.15M |
| Royal Bank of Canada | — | Corporate Bonds | 0.36% | $3.09M |
| Phillips 66 Co | — | Corporate Bonds | 0.36% | $3.08M |
| Flagstar Mortgage Trust 2021-6INV | — | Mortgage / Securitized | 0.36% | $3.05M |
| Ginnie Mae II Pool | — | Mortgage / Securitized | 0.36% | $3.05M |
| Hercules Capital Inc | — | Corporate Bonds | 0.36% | $3.05M |
| LAD Auto Receivables Trust 2024-3 | — | Mortgage / Securitized | 0.36% | $3.02M |
| Freddie Mac Pool | — | Mortgage / Securitized | 0.36% | $3.01M |
| Benefit Street Partners CLO IV Ltd | — | Mortgage / Securitized | 0.35% | $3.01M |
| Magnetite XXXV Ltd | — | Mortgage / Securitized | 0.35% | $3.00M |
| MidOcean Credit CLO XII Ltd | — | Mortgage / Securitized | 0.35% | $3.00M |
| Apidos Clo LV | — | Mortgage / Securitized | 0.35% | $3.00M |
| Hyundai Auto Receivables Trust 2024-C | — | Mortgage / Securitized | 0.35% | $3.00M |
| Goldentree Loan Management US Clo 8 Ltd | — | Mortgage / Securitized | 0.35% | $3.00M |
| Elmwood CLO I Ltd | — | Mortgage / Securitized | 0.35% | $2.99M |
| Ginnie Mae II Pool | — | Mortgage / Securitized | 0.35% | $2.96M |
| Allstate Corp/The | — | Corporate Bonds | 0.35% | $2.95M |
| Humana Inc | — | Corporate Bonds | 0.35% | $2.94M |
| Ginnie Mae II Pool | — | Mortgage / Securitized | 0.34% | $2.91M |
| HSBC Holdings PLC | — | Corporate Bonds | 0.34% | $2.89M |
| Freddie Mac Pool | — | Mortgage / Securitized | 0.34% | $2.88M |
| American National Group Inc | — | Corporate Bonds | 0.34% | $2.86M |
| First Citizens BancShares Inc/NC | — | Corporate Bonds | 0.34% | $2.85M |
| Belrose Funding Trust II | — | Corporate Bonds | 0.33% | $2.82M |
| Barclays PLC | — | Corporate Bonds | 0.33% | $2.78M |
| Kemper Corp | — | Corporate Bonds | 0.33% | $2.78M |
| Ginnie Mae II Pool | — | Mortgage / Securitized | 0.33% | $2.77M |
| BNP Paribas SA | — | Corporate Bonds | 0.33% | $2.76M |
| BGC Group Inc | — | Corporate Bonds | 0.32% | $2.73M |
| Blue Owl Technology Finance Corp II | — | Corporate Bonds | 0.32% | $2.69M |
| Ares Strategic Income Fund | — | Corporate Bonds | 0.32% | $2.69M |
| AES Corp/The | — | Corporate Bonds | 0.31% | $2.66M |
| Fortitude Global Funding | — | Corporate Bonds | 0.31% | $2.66M |
| CIFC Funding 2019-VI Ltd | — | Mortgage / Securitized | 0.31% | $2.65M |
| Blue Owl Credit Income Corp | — | Corporate Bonds | 0.31% | $2.65M |
MCBDX Sector Allocation
MassMutual Core Bond Fund holdings grouped by sector, by share of the portfolio's market value.
| Sector | Weight | Holdings |
|---|---|---|
| Mortgage / Securitized | 44.0% | 160 |
| Corporate Bonds | 40.0% | 201 |
| Government Bonds | 7.4% | 9 |
| Funds & ETFs | 1.3% | 1 |
| Unknown | 7.4% | 20 |
MCBDX Country Allocation
Where MassMutual Core Bond Fund's holdings are domiciled, by percentage of net assets (largest 15).
| Country | % of net assets |
|---|---|
| United States | 86.8% |
| Cayman Islands | 9.7% |
| United Kingdom | 2.3% |
| Canada | 1.6% |
| Bermuda | 1.5% |
| Jersey | 0.8% |
| Australia | 0.7% |
| Germany | 0.6% |
| Mexico | 0.6% |
| Switzerland | 0.6% |
| Netherlands | 0.5% |
| Finland | 0.5% |
| France | 0.5% |
| Sweden | 0.3% |
| Ireland | 0.1% |
MCBDX Portfolio Allocation
Asset-class allocation of MassMutual Core Bond Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Fixed Income | 50.7% |
| Securitized | 47.1% |
| Cash & Equivalents | 9.2% |
| Real Estate | 0.2% |
MCBDX Debt Constituents
Largest debt holdings of MassMutual Core Bond Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Debt holding | % of net assets |
|---|---|
| United States Treasury | 1.98% |
| United States Treasury | 1.79% |
| United States Treasury | 1.69% |
| United States Treasury | 1.16% |
| Fidus Re Ltd. | 0.70% |
| United States Treasury | 0.69% |
| Corebridge Financial, Inc. | 0.62% |
| Allianz SE | 0.60% |
| Enstar Finance LLC | 0.60% |
| Antares Holdings | 0.50% |
For information only. Not investment advice: figures are as reported in SEC filings and may contain errors or be out of date. Past performance does not guarantee future results.