497 1 mwt_sup.htm MWT PM SUPPLEMENT
SUPPLEMENT TO THE PROSPECTUS
The date of this supplement is August 17, 2017.


MFS® Global Total Return Fund
Effective immediately, the section entitled "Portfolio Manager(s)" beneath the main heading entitled "Summary of Key Information" is replaced in its entirety as follows:
Portfolio Manager(s)


Portfolio Manager
Since
Title
Nevin Chitkara
2006
Investment Officer of MFS
Pablo De La Mata
    2014
Investment Officer of MFS
Pilar Gomez-Bravo
2013
Investment Officer of MFS
Steven Gorham
2000
Investment Officer of MFS
Richard Hawkins
2010
Investment Officer of MFS
Robert Persons
2013
Investment Officer of MFS
Jonathan Sage
2014
Investment Officer of MFS
Robert Spector
2015
Investment Officer of MFS
Benjamin Stone
2009
Investment Officer of MFS
Erik Weisman
2005
Investment Officer of MFS

Effective October 1, 2017, the above chart is restated as follows:
Portfolio Manager
Since
Title
Nevin Chitkara
2006
Investment Officer of MFS
Pablo De La Mata
    2014
Investment Officer of MFS
Pilar Gomez-Bravo
2013
Investment Officer of MFS
Steven Gorham
2000
Investment Officer of MFS
Richard Hawkins
2010
Investment Officer of MFS
Vipin Narula
October 2017
Investment Officer of MFS
Robert Persons
2013
Investment Officer of MFS
Jonathan Sage
2014
Investment Officer of MFS
Robert Spector
2015
Investment Officer of MFS
Benjamin Stone
2009
Investment Officer of MFS
Erik Weisman
2005
Investment Officer of MFS
As of June 30, 2018, Pablo De La Mata, Richard Hawkins, and Benjamin Stone will no longer be portfolio managers of the Fund.
Effective immediately, the section entitled "Portfolio Manager(s)" beneath the main heading entitled "Management of the Fund" is replaced in its entirety as follows:
Portfolio Manager(s)
Information regarding the portfolio manager(s) of the fund is set forth below. Further information regarding the portfolio manager(s), including other accounts managed, compensation, ownership of fund shares, and possible conflicts of interest, is available in the fund's SAI.

Portfolio Manager
Primary  Role
Five Year History
Nevin Chitkara
Equity Securities Portfolio Manager
Employed in the investment area of MFS since 1997
Pablo De La Mata
Equity Securities Portfolio Manager
  Employed in the investment area of MFS
since 2008
Pilar Gomez-Bravo
Debt Instruments Portfolio Manager
Employed in the investment area of MFS since March 2013; Managing Director of Imperial Capital from May 2012 to March 2013; Portfolio Manager and Head of Research of Negentropy Capital from June 2011 to April 2012
Steven Gorham
Equity Securities Portfolio Manager
Employed in the investment area of MFS since 1992
Richard Hawkins
Debt Instruments Portfolio Manager
Employed in the investment area of MFS since 1988
Robert Persons
Investment Grade Debt Instruments Portfolio Manager
Employed in the investment area of MFS since 2000
Jonathan Sage
Equity Securities Portfolio Manager
Employed in the investment area of MFS since 2000
Robert Spector
Debt Instruments Portfolio Manager
Employed in the investment area of MFS since 2011
Benjamin Stone
Equity Securities Portfolio Manager
Employed in the investment area of MFS since 2005
Erik Weisman
Sovereign Debt Instruments Portfolio Manager
Employed in the investment area of MFS since 2002
1030922                        1                                MWT-SUP-I-081717
 
MFS Global Total Return Fund
Effective October 1, 2017, the above chart is restated as follows:
Portfolio Manager
Primary  Role
Five Year History
Nevin Chitkara
Equity Securities Portfolio Manager
Employed in the investment area of MFS since 1997
Pablo De La Mata
Equity Securities Portfolio Manager
  Employed in the investment area of MFS
since 2008
Pilar Gomez-Bravo
Debt Instruments Portfolio Manager
Employed in the investment area of MFS since March 2013; Managing Director of Imperial Capital from May 2012 to March 2013; Portfolio Manager and Head of Research of Negentropy Capital from June 2011 to April 2012
Steven Gorham
Equity Securities Portfolio Manager
Employed in the investment area of MFS since 1992
Richard Hawkins
Debt Instruments Portfolio Manager
Employed in the investment area of MFS since 1988
Vipin Narula
Equity Securities Portfolio Manager
Employed in the investment area of MFS since 2010
Robert Persons
Investment Grade Debt Instruments Portfolio Manager
Employed in the investment area of MFS since 2000
Jonathan Sage
Equity Securities Portfolio Manager
Employed in the investment area of MFS since 2000
Robert Spector
Debt Instruments Portfolio Manager
Employed in the investment area of MFS since 2011
Benjamin Stone
Equity Securities Portfolio Manager
Employed in the investment area of MFS since 2005
Erik Weisman
Sovereign Debt Instruments Portfolio Manager
Employed in the investment area of MFS since 2002
As of June 30, 2018, Pablo De La Mata, Richard Hawkins, and Benjamin Stone will no longer be portfolio managers of the Fund.


1030922                       2                              MWT-SUP-I-081717