MFS Research Fund Class B (MFRBX)

Fund Assets	7.57B
Expense Ratio	1.442%
Min. Investment	$1,000
Turnover	41.00%
Dividend (ttm)	n/a
Dividend Yield	n/a
Dividend Growth	n/a
Payout Frequency	Annual
Ex-Dividend Date	Dec 9, 2025

Previous Close	50.79
YTD Return	9.07%
1-Year Return	11.50%
5-Year Return	68.69%
52-Week Low	42.45
52-Week High	55.34
Beta (5Y)	0.97
Holdings	101
Inception Date	Oct 13, 1971

About MFRBX

MFS Research Fund Class B is a diversified mutual fund that primarily seeks capital appreciation by investing in a broad portfolio of equity securities. Managed by MFS Investment Management, the fund employs an analyst-driven approach, leveraging insights from sector specialists to construct a core stock fund that is diversified across industries and investment styles. The fund is generally managed to be sector neutral relative to the S&P 500 Index, aiming to mirror the broad composition of the U.S. equity market while seeking to add value through selective stock picking. Since its inception in 1971 and with a Class B share class established in 1993, the fund has accrued substantial assets, reflecting its reputation within the large-blend category. MFS Research Fund Class B’s structure offers investors exposure to various industries, making it relevant for those seeking participation in the overall growth and stability of the U.S. stock market without overconcentration in specific sectors. The fund is benchmarked to the S&P 500, underscoring its alignment with widely accepted measures of U.S. market performance and providing a familiar reference point for evaluating its results.

• Fund Family: MFS
• Category: Large Blend
• Performance Rating: Below Average
• Risk Rating: Below Average
• Stock Exchange: Nasdaq
• Ticker Symbol: MFRBX
• Share Class: B
• Index: S&P 500 TR

Performance

MFRBX had a total return of 11.50% in the past year, including dividends. Since the fund's inception, the average annual return has been 8.83%.

Equivalent Funds

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

Symbol	Provider	Name	Expense Ratio
VQNPX	Vanguard	Vanguard Growth and Income Fund Investor Shares	0.39%
FMGKX	Fidelity	Fidelity Magellan K	0.57%
FMAGX	Fidelity	Fidelity Magellan Fund	0.64%
FEQDX	Fidelity	Fidelity Advisor Hedged Equity C	1.55%
VPMCX	Vanguard	Vanguard PRIMECAP Inv	0.35%

Other Share Classes

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

Symbol	Share Class	Expense Ratio
MFRKX	R6	0.44%
MRFIX	I	0.50%
MFRJX	R4	0.50%
MFRHX	R3	0.75%

Top 10 Holdings

43.25% of assets

Name	Symbol	Weight
NVIDIA Corporation	NVDA	8.48%
Microsoft Corporation	MSFT	6.77%
Apple Inc.	AAPL	6.52%
Amazon.com, Inc.	AMZN	4.68%
Alphabet Inc.	GOOGL	4.63%
Broadcom Inc.	AVGO	3.35%
Mastercard Incorporated	MA	2.48%
JPMorgan Chase & Co.	JPM	2.22%
Meta Platforms, Inc.	META	2.13%
Advanced Micro Devices, Inc.	AMD	2.01%

Dividend History

Ex-Dividend	Amount	Pay Date
Dec 9, 2025	$8.71195	Dec 10, 2025
Dec 10, 2024	$5.49885	Dec 11, 2024
Dec 12, 2023	$3.26308	Dec 13, 2023
Dec 8, 2022	$3.17964	Dec 9, 2022
Dec 9, 2021	$3.09287	Dec 10, 2021
Dec 10, 2020	$2.32696	Dec 11, 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 15, 2026

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