MRSKX
MFS Research International Fund
MFS SERIES TRUST I
Expense ratio1
0.64%
Net assets2
$18.84B
Holdings2
115
Category
International Equity
2025 return3
22.80%

Investment objective & strategy

As of Dec. 29, 2025 · prospectus

Objective. The funds investment objective is to seek capital appreciation.

Strategy. MFS (Massachusetts Financial Services Company, the fund's investment adviser) normally invests the funds assets primarily in foreign equity securities, including emerging market equity securities. Equity securities include common stocks, depositary receipts, and other securities that represent an ownership interest (or right to acquire an ownership interest) in a company or other issuer. MFS normally invests the fund's assets across different industries, sectors, countries, and regions, but MFS may invest a significant percentage of the funds assets in issuers in a single industry, sector, country, or region. 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 … MFS (Massachusetts Financial Services Company, the fund's investment adviser) normally invests the funds assets primarily in foreign equity securities, including emerging market equity securities. Equity securities include common stocks, depositary receipts, and other securities that represent an ownership interest (or right to acquire an ownership interest) in a company or other issuer. MFS normally invests the fund's assets across different industries, sectors, countries, and regions, but MFS may invest a significant percentage of the funds assets in issuers in a single industry, sector, country, or region. 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 securities of companies of any size. In conjunction with a team of investment research analysts, sector leaders select investments for the fund. MFS generally manages the fund to be sector neutral to the MSCI EAFE (Europe, Australasia, Far East) Index using MFS' custom industry and sector categories to classify the fund and the MSCI EAFE (Europe, Australasia, Far East) Index's holdings. MFS uses an active bottom-up investment approach to buying and selling investments for the fund. Investments are selected primarily based on fundamental analysis of individual issuers. Quantitative screening tools that systematically evaluate issuers may also be considered.

Top holdings

As of Feb. 28, 2026 · N-PORT
SecurityTickerValue% of fund
ROCHE HOLDINGS AG (GENUSSCHEINE) $597.46M 3.17%
MIZUHO FINANCIAL $582.58M 3.09%
SCHNEIDER ELECTR $539.55M 2.86%
HITACHI LTD $465.11M 2.47%
Novartis AG (Registered) NVSEF $438.51M 2.33%
ASML Holding NV $368.20M 1.95%
TSMC $339.90M 1.80%
LINDE PLC $331.31M 1.76%
TOTALENERGIES SE $311.07M 1.65%
TOKYO ELECTRON $299.23M 1.59%
View all holdings →

Allocation by sector

As of February 28, 2026 · N-PORT
View portfolio breakdown →

Portfolio moves

Nov 30, 2025 → Feb 28, 2026
Opened
13
Exited
14
Increased
15
Decreased
87
Unchanged
1

How many positions this fund opened, exited, grew, trimmed, or left unchanged between its two most recent N-PORT snapshots — net changes between point-in-time reports, not a trade log.

View portfolio moves →

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Advisers

As of August 31, 2025 · N-CEN
FirmRole
MASSACHUSETTS FINANCIAL SERVICES COMPANY Adviser

Footnotes

  1. Expense ratio as of December 29, 2025, from the fund's prospectus.
  2. Net assets and holdings count as of February 28, 2026, from the fund's N-PORT filing.
  3. Total return for calendar year 2025, before tax and after fund expenses. Computed by compounding the twelve monthly total returns the fund reported in its SEC N-PORT filings for 2025 (the latest prospectus does not yet chart this year).

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