MFS Blended Research Mid Cap Eq B (BMSBX)

Fund Assets	3.16B
Expense Ratio	1.624%
Min. Investment	$1,000
Turnover	51.00%
Dividend (ttm)	n/a
Dividend Yield	n/a
Dividend Growth	n/a
Payout Frequency	Annual
Ex-Dividend Date	Dec 11, 2025

Previous Close	17.07
YTD Return	16.84%
1-Year Return	17.88%
5-Year Return	72.27%
52-Week Low	14.24
52-Week High	17.95
Beta (5Y)	1.14
Holdings	177
Inception Date	Aug 19, 2016

About BMSBX

MFS Blended Research Mid Cap Equity Fund Class B is a mutual fund that focuses on pursuing capital appreciation by investing primarily in equity securities of mid-capitalization companies. The fund blends both growth and value styles, targeting businesses with market capitalizations within the range of the Russell Midcap Index. Its investment strategy is distinguished by the integration of fundamental and quantitative research methods, aiming to balance in-depth company analysis with data-driven insights. Typical holdings span a range of sectors including financial services, healthcare, technology, industrials, and utilities. The fund maintains a diversified portfolio, with around 145 holdings and significant representation among its top ten positions. MFS Blended Research Mid Cap Equity Fund Class B is notable for its active management and relatively high active share, which means its portfolio deviates meaningfully from its benchmark, the Russell Midcap Index. The fund is designed for investors seeking diversified exposure to the U.S. mid-cap equity market, reflecting a blend of established companies with potential for continued growth and innovation.

• Fund Family: MFS
• Category: Mid-Cap Blend
• Performance Rating: Above Average
• Risk Rating: Average
• Stock Exchange: Nasdaq
• Ticker Symbol: BMSBX
• Share Class: B
• Index: Russell MidCap TR

Performance

BMSBX had a total return of 17.88% in the past year, including dividends. Since the fund's inception, the average annual return has been 11.72%.

Equivalent Funds

These are funds that follow the same index from the other major fund companies.

Symbol	Provider	Name	Expense Ratio
SWMCX	Schwab	Schwab ® US Mid-Cap Index	0.04%
FLAPX	Fidelity	Fidelity Flex Mid Cap Index Fund	n/a
FSMDX	Fidelity	Fidelity Mid Cap Index Fund	0.03%

Other Share Classes

These are alternative share classes of the same fund, from the same provider.

Symbol	Share Class	Expense Ratio
BMSYX	R6	0.51%
BMSVX	R4	0.59%
BMSLX	I	0.59%
BMSTX	R3	0.84%

Top 10 Holdings

17.06% of assets

Name	Symbol	Weight
Northern Trust Corporation	NTRS	1.85%
Ameriprise Financial, Inc.	AMP	1.80%
DexCom, Inc.	DXCM	1.75%
Humana Inc.	HUM	1.72%
Aramark	ARMK	1.69%
Valero Energy Corporation	VLO	1.68%
Westinghouse Air Brake Technologies Corporation	WAB	1.67%
Okta, Inc.	OKTA	1.66%
Illumina, Inc.	ILMN	1.63%
Popular, Inc.	BPOP	1.60%

Dividend History

Ex-Dividend	Amount	Pay Date
Dec 11, 2025	$0.34981	Dec 12, 2025
Dec 12, 2024	$1.41539	Dec 13, 2024
Dec 14, 2023	$0.17135	Dec 15, 2023
Dec 13, 2022	$0.45511	Dec 14, 2022
Dec 14, 2021	$2.99842	Dec 15, 2021
Dec 15, 2020	$0.01276	Dec 16, 2020

Data Sources: Tiingo, Twelve Data, and more

Historical data is provided by Tiingo. Delayed stock pricing data is provided by Twelve Data. Several fund data points are also provided by Finnhub.

Last checked:

Oct 16, 2026

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