MMNGX — MassMutual Mid Cap Growth Fund
Data updated: 2026-08-27
MMNGX — MassMutual Mid Cap Growth Fund. United States Mid Cap Growth Equity · $2.50B AUM · 0.76% expense ratio. Holdings, fees, performance and SEC filings.
MMNGX Fund Overview
MMNGX — 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: $2.50B
- 1-year return: 10.6%
- Ticker: MMNGX
- SEC CIK: 0000916053
- SEC series ID: S000003665
- Share class ID: C000240790
MMNGX 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 |
|---|---|
| Datadog Inc | 2.07% |
| Agilent Technologies Inc | 1.96% |
| Teradyne Inc | 1.83% |
| Mettler-Toledo International Inc | 1.76% |
| Snowflake Inc | 1.64% |
| Fixed Income Clearing Corp. | 1.62% |
| Burlington Stores Inc | 1.60% |
| Lattice Semiconductor Corp | 1.58% |
| Keysight Technologies Inc | 1.57% |
| XPO Inc | 1.52% |
MMNGX 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 | 98.4% |
| Cash & Equivalents | 2.0% |
MMNGX Performance
Total returns for MMNGX (as of 2026-09-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | 7.7% |
| 1 year | 10.6% |
| 3 years (annualised) | 9.5% |
MMNGX Risk Information
Risk metrics for MMNGX, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 10.6%
MMNGX Costs and Fees
MMNGX costs about $76 per $10,000 invested per year in fund expenses.
- Net expense ratio: 0.76%
- Gross expense ratio: 0.78%
- Portfolio turnover: 38%
- Brokerage commissions: 2.58 bps of average net assets (SEC N-CEN)
MMNGX Cashflows
Over the 12 months to 2026-06, MassMutual Mid Cap Growth Fund had net outflows of $1.40B, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-06 | −$133.61M |
| 2026-05 | −$260.52M |
| 2026-04 | −$136.23M |
| 2026-03 | −$289.20M |
| 2026-02 | −$134.03M |
| 2026-01 | −$127.54M |
MMNGX Debt Constituents
No individual debt constituents are reported in MassMutual Mid Cap Growth Fund's latest SEC N-PORT filing.
MMNGX Prospectus and SEC Filings
Official MassMutual Mid Cap Growth Fund filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
- Prospectus (485BPOS) — filed 2026-01-30
- Prospectus (485BPOS) — filed 2025-01-31
- Prospectus supplement (497) — filed 2024-02-28
- Portfolio holdings (N-PORT) — filed 2026-08-27
- Portfolio holdings (N-PORT) — filed 2026-05-27
- Portfolio holdings (N-PORT) — filed 2026-02-26
- Annual census (N-CEN) — filed 2025-12-12
- Annual census (N-CEN) — filed 2024-12-13
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.