<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000063090
<NAME> MASSACHUSETTS INVESTORS GROWTH STOCK FUND
<SERIES>
<NUMBER> 011
<NAME> MASSACHUSETTS INVESTORS GROWTH STOCK FUND - CLASS A
<MULTIPLIER> 1
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> NOV-30-2000
<PERIOD-START> DEC-01-1999
<PERIOD-END> MAY-31-2000
<INVESTMENTS-AT-COST> 13784771292
<INVESTMENTS-AT-VALUE> 15898157444
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<TOTAL-ASSETS> 17295727016
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<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 1000962165
<TOTAL-LIABILITIES> 1527781878
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 12473783503
<SHARES-COMMON-STOCK> 446642015
<SHARES-COMMON-PRIOR> 352547688
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 35250161
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<OVERDISTRIBUTION-GAINS> 0
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<DIVIDEND-INCOME> 29174696
<INTEREST-INCOME> 21321570
<OTHER-INCOME> (346453)
<EXPENSES-NET> (82765069)
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<REALIZED-GAINS-CURRENT> 1373520871
<APPREC-INCREASE-CURRENT> 48826478
<NET-CHANGE-FROM-OPS> 1389732093
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> (588811032)
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<NUMBER-OF-SHARES-SOLD> 413383185
<NUMBER-OF-SHARES-REDEEMED> (343403309)
<SHARES-REINVESTED> 24114451
<NET-CHANGE-IN-ASSETS> 4297278648
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<OVERDISTRIB-NII-PRIOR> (2634905)
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<GROSS-EXPENSE> (83931867)
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<PER-SHARE-NAV-BEGIN> 19.29
<PER-SHARE-NII> (0.02)
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<PER-SHARE-DISTRIBUTIONS> (1.62)
<RETURNS-OF-CAPITAL> 0.00
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<EXPENSE-RATIO> 0.88
</TABLE>
