MEFNX — MassMutual Mid Cap Growth Fund
Data updated: 2026-05-27
MEFNX — MassMutual Mid Cap Growth Fund data: holdings, portfolio allocation, expenses, performance, cashflows, risk and SEC filings. United States Mid Cap Growth Equity · $2.75B AUM · 1.36% expense ratio · 8.7% 1-yr return. From SEC regulatory filings.
MEFNX Fund Overview
MEFNX — MassMutual Mid Cap Growth Fund is a US mutual fund managed by Massmutual Select Funds, categorised as United States Mid Cap Growth Equity. ABC INVEST provides holdings, performance, costs, cashflows, risk data, prospectus documents and SEC filings, sourced from SEC filings.
- Type: US mutual fund
- Manager: Massmutual Select Funds
- Category: United States Mid Cap Growth Equity
- Assets under management: $2.75B
- 1-year return: 8.7%
- Ticker: MEFNX
- SEC CIK: 0000916053
- SEC series ID: S000003665
- Share class ID: C000010214
MEFNX Holdings
Top 10 holdings of MassMutual Mid Cap Growth Fund by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| Fixed Income Clearing Corp. | 2.29% |
| Hilton Worldwide Holdings Inc | 2.01% |
| XPO Inc | 1.97% |
| Monolithic Power Systems Inc | 1.91% |
| Lattice Semiconductor Corp | 1.83% |
| Agilent Technologies Inc | 1.80% |
| Mettler-Toledo International Inc | 1.71% |
| Burlington Stores Inc | 1.70% |
| Cencora Inc | 1.50% |
| Alnylam Pharmaceuticals Inc | 1.47% |
MEFNX Portfolio Allocation
Asset-class allocation of MassMutual Mid Cap Growth Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Equity | 97.8% |
| Cash & Equivalents | 2.6% |
MEFNX Performance
Total returns for MEFNX (as of 2026-08-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | -3.4% |
| 1 year | 8.7% |
| 3 years (annualised) | 6.9% |
| 5 years (annualised) | 1.9% |
MEFNX Risk Information
Risk metrics for MEFNX, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 11.0%
MEFNX Costs and Fees
MEFNX costs about $136 per $10,000 invested per year in fund expenses.
- Net expense ratio: 1.36%
- Gross expense ratio: 1.38%
- Portfolio turnover: 38%
- Brokerage commissions: 2.58 bps of average net assets (SEC N-CEN)
MEFNX Cashflows
Over the 12 months to 2026-03, MassMutual Mid Cap Growth Fund had net outflows of $1.16B, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-03 | −$289.20M |
| 2026-02 | −$134.03M |
| 2026-01 | −$127.54M |
| 2025-12 | $472.29M |
| 2025-11 | −$130.69M |
| 2025-10 | −$183.37M |
MEFNX Debt Constituents
No individual debt constituents are reported in MassMutual Mid Cap Growth Fund's latest SEC N-PORT filing.
MEFNX Prospectus and SEC Filings
Official MassMutual Mid Cap Growth Fund filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
Related Funds
Other United States Mid Cap Growth Equity funds tracked on ABC INVEST:
Data Sources
ABC INVEST compiles this page from public filings made to the U.S. Securities and Exchange Commission (SEC) through EDGAR: portfolio holdings and monthly cashflows from Form N-PORT, expenses and returns from fund prospectuses (Form 485BPOS) and the SEC DERA Risk/Return Summary data sets, annual data from Form N-CEN, and shareholder reports from Form N-CSR.