MFS Research Series
Data updated: 2026-05-26
C000007306 — MFS Research Series data: holdings, portfolio allocation, expenses, performance, cashflows, risk and SEC filings. United States Large Cap Blend / Core Equity · $352.27M AUM · 0.74% expense ratio · 13.2% 1-yr return. From SEC regulatory filings.
C000007306 Fund Overview
MFS Research Series is a US mutual fund managed by Mfs Variable Insurance Trust, categorised as United States Large Cap Blend / Core Equity. ABC INVEST provides holdings, performance, costs, cashflows, risk data, prospectus documents and SEC filings, sourced from SEC filings.
- Type: US mutual fund
- Manager: Mfs Variable Insurance Trust
- Category: United States Large Cap Blend / Core Equity
- Assets under management: $352.27M
- 1-year return: 13.2%
- SEC CIK: 0000918571
- SEC series ID: S000002668
- Share class ID: C000007306
C000007306 Holdings
Top 10 holdings of MFS Research Series by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| NVIDIA Corp | 8.29% |
| Apple Inc | 6.80% |
| Microsoft Corp | 5.85% |
| Alphabet Inc | 4.59% |
| Amazon.com Inc | 4.47% |
| Broadcom Inc | 3.07% |
| Meta Platforms Inc | 2.82% |
| Mastercard Inc | 2.50% |
| JPMorgan Chase & Co | 2.47% |
| Exxon Mobil Corp | 1.94% |
C000007306 Portfolio Allocation
Asset-class allocation of MFS Research Series by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Equity | 100.0% |
C000007306 Performance
Total returns for C000007306 (as of 2026-08-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | -4.8% |
| 1 year | 13.2% |
| 3 years (annualised) | 14.4% |
| 5 years (annualised) | 8.9% |
C000007306 Risk Information
Risk metrics for C000007306, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 10.1%
C000007306 Costs and Fees
C000007306 costs about $74 per $10,000 invested per year in fund expenses.
- Net expense ratio: 0.74%
- Gross expense ratio: 0.82%
- Portfolio turnover: 42%
- Brokerage commissions: 0.96 bps of average net assets (SEC N-CEN)
C000007306 Cashflows
Over the 12 months to 2026-03, MFS Research Series had net inflows of $43.09M, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-03 | $742.83K |
| 2026-02 | −$2.45M |
| 2026-01 | −$2.63M |
| 2025-12 | −$3.62M |
| 2025-11 | −$3.99M |
| 2025-10 | −$4.79M |
C000007306 Debt Constituents
No individual debt constituents are reported in MFS Research Series's latest SEC N-PORT filing.
C000007306 Prospectus and SEC Filings
Official MFS Research Series filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
Related Funds
Other United States Large Cap Blend / Core 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.