MBCSX — MassMutual Blue Chip Growth Fund
Data updated: 2026-08-27
MBCSX — MassMutual Blue Chip Growth Fund. United States Large Cap Growth Equity · $1.87B AUM. Holdings, fees, performance and SEC filings.
MBCSX Fund Overview
MBCSX — MassMutual Blue Chip Growth Fund is a US mutual fund managed by Massmutual Select Funds, categorised as United States Large 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 Large Cap Growth Equity
- Assets under management: $1.87B
- 1-year return: 6.8%
- Ticker: MBCSX
- SEC CIK: 0000916053
- SEC series ID: S000003658
- Share class ID: C000010179
MBCSX Holdings
Top 10 holdings of MassMutual Blue Chip Growth Fund by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| NVIDIA Corp | 14.32% |
| Alphabet Inc | 7.96% |
| Tesla Inc | 5.03% |
| Meta Platforms Inc | 4.75% |
| Amazon.com Inc | 4.60% |
| Microsoft Corp | 4.43% |
| Alphabet Inc | 3.63% |
| Visa Inc | 3.49% |
| Applied Materials Inc | 3.26% |
| Broadcom Inc | 3.23% |
MBCSX Portfolio Allocation
Asset-class allocation of MassMutual Blue Chip Growth Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Equity | 98.9% |
| Cash & Equivalents | 0.9% |
| Fixed Income | 0.1% |
MBCSX Performance
Total returns for MBCSX (as of 2026-09-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | -1.5% |
| 1 year | 6.8% |
| 3 years (annualised) | 19.7% |
| 5 years (annualised) | 9.9% |
MBCSX Risk Information
Risk metrics for MBCSX, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 17.1%
MBCSX Costs and Fees
MBCSX costs about $76 per $10,000 invested per year in fund expenses.
- Net expense ratio: 0.76%
- Gross expense ratio: 0.76%
- Portfolio turnover: 14%
- Brokerage commissions: 0.71 bps of average net assets (SEC N-CEN)
MBCSX Cashflows
Over the 12 months to 2026-06, MassMutual Blue Chip Growth Fund had net inflows of $230.75M, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-06 | −$71.78M |
| 2026-05 | −$19.26M |
| 2026-04 | −$31.65M |
| 2026-03 | −$25.61M |
| 2026-02 | −$40.16M |
| 2026-01 | −$43.53M |
MBCSX Debt Constituents
Largest debt holdings of MassMutual Blue Chip Growth Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Debt holding | % of net assets |
|---|---|
| Carvana Co. | 0.08% |
| Carvana Co. | 0.06% |
MBCSX Prospectus and SEC Filings
Official MassMutual Blue Chip 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 (485BPOS) — filed 2024-02-02
- 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 Large 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.