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<PAGE> PAGE 13
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<PAGE> PAGE 23
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<PAGE> PAGE 28
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<PAGE> PAGE 29
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<PAGE> PAGE 30
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<PAGE> PAGE 31
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<PAGE> PAGE 34
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<PAGE> PAGE 35
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<PAGE> PAGE 41
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<PAGE> PAGE 42
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<PAGE> PAGE 44
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<PAGE> PAGE 45
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<PAGE> PAGE 46
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<PAGE> PAGE 47
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<PAGE> PAGE 48
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<PAGE> PAGE 49
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<PAGE> PAGE 50
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<PAGE> PAGE 51
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<PAGE> PAGE 52
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<PAGE> PAGE 53
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<PAGE> PAGE 55
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<PAGE> PAGE 56
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<PAGE> PAGE 57
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<PAGE> PAGE 58
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<PAGE> PAGE 59
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<PAGE> PAGE 60
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<PAGE> PAGE 61
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<PAGE> PAGE 62
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<PAGE> PAGE 63
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<PAGE> PAGE 64
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<PAGE> PAGE 65
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<PAGE> PAGE 66
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066 F001200 N
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<PAGE> PAGE 67
070 J011200 Y
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<PAGE> PAGE 68
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<PAGE> PAGE 69
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<PAGE> PAGE 70
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<PAGE> PAGE 71
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<PAGE> PAGE 72
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<PAGE> PAGE 73
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<PAGE> PAGE 74
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SIGNATURE JAMES O. YOST
TITLE ASSISTANT TREASURER
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<CIK> 0000798244
<NAME> MFS SERIES TRUST I
<SERIES>
<NUMBER> 061
<NAME> MFS CORE GROWTH FUND - CLASS A
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<S> <C>
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<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000798244
<NAME> MFS SERIES TRUST I
<SERIES>
<NUMBER> 062
<NAME> MFS CORE GROWTH FUND - CLASS I
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<S> <C>
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<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000798244
<NAME> MFS SERIES TRUST I
<SERIES>
<NUMBER> 101
<NAME> MFS CONVERTIBLE SECURITIES FUND - CLASS A
<MULTIPLIER> 1
<S> <C>
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</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000798244
<NAME> MFS SERIES TRUST I
<SERIES>
<NUMBER> 102
<NAME> MFS CONVERTIBLE SECURITIES FUND - CLASS I
<MULTIPLIER> 1
<S> <C>
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<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000798244
<NAME> MFS SERIES TRUST I
<SERIES>
<NUMBER> 041
<NAME> MFS EQUITY INCOME FUND - CLASS A
<MULTIPLIER> 1
<S> <C>
<PERIOD-TYPE> 6-MOS
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<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000798244
<NAME> MFS SERIES TRUST I
<SERIES>
<NUMBER> 042
<NAME> MFS EQUITY INCOME FUND - CLASS I
<MULTIPLIER> 1
<S> <C>
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<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000798244
<NAME> MFS SERIES TRUST I
<SERIES>
<NUMBER> 031
<NAME> MFS WORLD ASSET ALLOCATION FUND - CLASS A
<MULTIPLIER> 1
<S> <C>
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<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000798244
<NAME> MFS SERIES TRUST I
<SERIES>
<NUMBER> 032
<NAME> MFS WORLD ASSET ALLOCATION FUND - CLASS B
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<S> <C>
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<TABLE> <S> <C>
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<CIK> 0000798244
<NAME> MFS SERIES TRUST I
<SERIES>
<NUMBER> 033
<NAME> MFS WORLD ASSET ALLOCATION FUND - CLASS C
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<S> <C>
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<NAME> MFS SERIES TRUST I
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<NAME> MFS WORLD ASSET ALLOCATION FUND - CLASS I
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<NAME> MFS SERIES TRUST I
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<NAME> MFS CASH RESERVE FUND - CLASS A
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<CIK> 0000798244
<NAME> MFS SERIES TRUST I
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<NAME> MFS CASH RESERVE FUND - CLASS B
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<CIK> 0000798244
<NAME> MFS SERIES TRUST I
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<NAME> MFS CASH RESERVE FUND - CLASS C
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<CIK> 0000798244
<NAME> MFS SERIES TRUST I
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<NAME> MFS MANAGED SECTORS FUND - CLASS A
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<NAME> MFS SERIES TRUST I
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<NAME> MFS MANAGED SECTORS FUND - CLASS B
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<NAME> MFS SERIES TRUST I
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<NAME> MFS MANAGED SECTORS FUND - CLASS I
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<NAME> MFS SERIES TRUST I
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<NAME> MFS NEW DISCOVERY FUND - CLASS A
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<NAME> MFS SERIES TRUST I
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<NAME> MFS SERIES TRUST I
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<NAME> MFS RESEARCH GROWTH AND INCOME FUND - CLASS A
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<NAME> MFS SERIES TRUST I
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<NAME> MFS RESEARCH GROWTH AND INCOME FUND - CLASS B
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<NAME> MFS SERIES TRUST I
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<NAME> MFS RESEARCH GROWTH AND INCOME FUND - CLASS C
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<NAME> MFS SERIES TRUST I
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<CIK> 0000798244
<NAME> MFS SERIES TRUST I
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<NAME> MFS RESEARCH INTERNATIONAL FUND - CLASS A
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<NAME> MFS SERIES TRUST I
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<NAME> MFS RESEARCH INTERNATIONAL FUND - CLASS I
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<NAME> MFS SERIES TRUST I
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<NAME> MFS SCIENCE AND TECHNOLOGY FUND - CLASS A
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<NAME> MFS SERIES TRUST I
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<NAME> MFS SCIENCE AND TECHNOLOGY FUND - CLASS I
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<CIK> 0000798244
<NAME> MFS SERIES TRUST I
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<NAME> MFS SPECIAL OPPORTUNITIES FUND - CLASS A
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<CIK> 0000798244
<NAME> MFS SERIES TRUST I
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<NAME> MFS SPECIAL OPPORTUNITIES FUND - CLASS I
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