BRSNX — MFS Blended Research Small Cap Equity Fund
Data updated: 2026-09-25
BRSNX — MFS Blended Research Small Cap Equity Fund. United States Small Cap Blend / Core Equity · $326.51M AUM. Holdings, fees, performance and SEC filings.
BRSNX Fund Overview
BRSNX — MFS Blended Research Small Cap Equity Fund is a US mutual fund managed by Mfs Series Trust X, categorised as United States Small 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 Series Trust X
- Category: United States Small Cap Blend / Core Equity
- Assets under management: $326.51M
- 1-year return: -7.1%
- Ticker: BRSNX
- SEC CIK: 0000783740
- SEC series ID: S000050659
- Share class ID: C000172235
BRSNX Investment Objective and Strategy
MFS Blended Research Small Cap Equity Fund describes its objective and strategy as follows, from its latest prospectus filed with the SEC by Mfs Series Trust X.
Investment objective
The funds investment objective is to seek capital appreciation.
Principal investment strategy
MFS (Massachusetts Financial Services Company, the funds investment adviser) seeks to achieve the funds objective by actively selecting potential investments based on fundamental and quantitative analysis and then constructing a portfolio from these potential investments by systematically managing various risk factors (e.g., issuer, industry, and sector weightings, market capitalization, and volatility) compared to the Russell 2000 Index (the Index), which represents the funds investment universe. MFS normally invests at least 80% of the funds net assets in equity securities of issuers with small market capitalizations. MFS generally defines small market capitalization issuers as issuers with market capitalizations similar to those of issuers included in the Index over the last 13 months at the time of purchase.
As of August 31, 2018, the range of the market capitalizations of the issuers in the Index was between approximately $32.8 million and $8.3 billion. Equity securities include common stocks, equity interests in real estate investment trusts (REITs), and other securities that represent an ownership interest (or right to acquire an ownership interest) in a company or other issuer. In selecting investments for the fund, MFS is not constrained by any particular investment style. MFS may invest the funds assets in the stocks of companies it believes to have above average earnings growth potential compared to other companies (growth companies), in the stocks of companies it believes are undervalued compared to their perceived worth (value companies), or in a combination of growth and value companies.
MFS may invest the funds assets in foreign securities. MFS normally invests the funds assets across different industries and sectors, but MFS may invest a significant percentage of the funds assets in issuers in a single industry or sector. MFS uses an active bottom-up approach to buying and selling investments for the fund. Investments are selected primarily based on blending fundamental and quantitative research. MFS uses fundamental analysis of individual issuers to determine a fundamental rating for an issuer. MFS uses quantitative analysis to determine a quantitative rating for an issuer. When MFS quantitative research is available but MFS fundamental research is not available, MFS considers the issuer to have a neutral fundamental rating. MFS constructs the portfolio by considering the blended rating from combining the fundamental rating and the quantitative rating, as well as issuer, industry, and sector weightings, market capitalization, volatility, and other factors.
MFS goal is to construct an actively managed portfolio with a target predicted tracking error of approximately 3% compared to the Index. Tracking error generally measures how the differences between the funds returns and the Indexs returns have varied over a period of time. For purposes of the funds 80% policy, net assets include the amount of any borrowings for investment purposes.
BRSNX Holdings
Top 10 holdings of MFS Blended Research Small Cap Equity Fund by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| Corsair Gaming Inc | 1.98% |
| JP Morgan US Government Money Market Fund | 1.96% |
| Bloom Energy Corp | 1.85% |
| MYR Group Inc | 1.73% |
| FormFactor Inc | 1.68% |
| UMB Financial Corp | 1.54% |
| Modine Manufacturing Co | 1.49% |
| Portland General Electric Co | 1.46% |
| Weatherford International PLC | 1.43% |
| Popular Inc | 1.41% |
BRSNX Portfolio Allocation
Asset-class allocation of MFS Blended Research Small Cap Equity Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Equity | 99.9% |
| Cash & Equivalents | 2.0% |
BRSNX Performance
Total returns for BRSNX (as of 2026-10-01), from SEC filings.
| Period | Total return |
|---|---|
| 1 year | -7.1% |
| 3 years (annualised) | 10.1% |
BRSNX Risk Information
Risk metrics for BRSNX, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 14.9%
BRSNX Costs and Fees
BRSNX costs about $104 per $10,000 invested per year in fund expenses.
- Net expense ratio: 1.04%
- Gross expense ratio: 1.16%
- Portfolio turnover: 73%
- Brokerage commissions: 4.74 bps of average net assets (SEC N-CEN)
BRSNX Cashflows
Over the 12 months to 2026-05, MFS Blended Research Small Cap Equity Fund had net outflows of $48.99M, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-05 | −$4.22M |
| 2026-04 | −$4.18M |
| 2026-03 | −$5.81M |
| 2026-02 | −$2.18M |
| 2026-01 | −$7.65M |
| 2025-12 | $15.50M |
BRSNX Debt Constituents
No individual debt constituents are reported in MFS Blended Research Small Cap Equity Fund's latest SEC N-PORT filing.
BRSNX Prospectus and SEC Filings
Official MFS Blended Research Small Cap Equity Fund filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
- Prospectus (485BPOS) — filed 2026-09-25
- Prospectus (485BPOS) — filed 2025-09-25
- Prospectus (485BPOS) — filed 2024-09-26
- Portfolio holdings (N-PORT) — filed 2026-07-27
- Portfolio holdings (N-PORT) — filed 2026-04-24
- Portfolio holdings (N-PORT) — filed 2026-01-26
- Annual census (N-CEN) — filed 2026-08-13
- Annual census (N-CEN) — filed 2025-08-14
Related Funds
Other United States Small 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.