<PAGE> PAGE 1
000 A000000 12/31/94
000 C000000 867969
000 D000000 N
000 E000000 NF
000 F000000 Y
000 G000000 N
000 H000000 N
000 I000000 3.0.a
000 J000000 A
001 A000000 MFS INSTITUTIONAL TRUST
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001 C000000 6179545000
002 A000000 500 BOYLSTON STREET
002 B000000 BOSTON
002 C000000 MA
002 D010000 02116
003 000000 N
004 000000 N
005 000000 N
006 000000 N
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007 C010100 1
007 C020100 MFS WORLDWIDE FIXED INCOME FUND
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007 C010200 2
007 C020200 MFS EMERGING EQUITIES FUND
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007 C010400 4
007 C010500 5
007 C010600 6
007 C010700 7
007 C010800 8
007 C010900 9
007 C011000 10
008 A00AA01 MASSACHUSETTS FINANCIAL SERVICES COMPANY
008 B00AA01 A
008 C00AA01 801-17352
008 D01AA01 BOSTON
008 D02AA01 MA
008 D03AA01 02116
012 A00AA01 MFS SERVICE CENTER, INC.
012 B00AA01 84-1316
012 C01AA01 BOSTON
012 C02AA01 MA
012 C03AA01 02116
013 A00AA01 DELOITTE & TOUCHE
013 B01AA01 BOSTON
013 B02AA01 MA
013 B03AA01 02110
<PAGE> PAGE 2
015 A00AA01 STATE STREET BANK AND TRUST COMPANY
015 B00AA01 C
015 C01AA01 BOSTON
015 C02AA01 MA
015 C03AA01 02110
015 E01AA01 X
015 A00AA02 CHASE MANHATTAN BANK, N.A.
015 B00AA02 S
015 C01AA02 NEW YORK
015 C02AA02 NY
015 C03AA02 10081
015 E04AA02 X
018 00AA00 Y
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020 B000001 04-2579802
020 C000001 9
020 A000002 MORGAN STANLEY
020 B000002 13-2655998
020 C000002 5
020 A000003 INSTINET CORP.
020 B000003 13-3443395
020 C000003 5
020 A000004 BEAR STEARNS & CO.
020 B000004 13-4946705
020 C000004 5
020 A000005 MONTGOMERY SECURITIES
020 B000005 94-1701676
020 C000005 4
020 A000006 SALOMON BROTHERS INC.
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020 A000008 DUNLEVY & COMPANY
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<PAGE> PAGE 3
022 B000002 22-2347336
022 C000002 117198
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022 A000003 CS FIRST BOSTON
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022 C000003 84637
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022 C000004 45341
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<PAGE> PAGE 4
031 A00AA00 0
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<PAGE> PAGE 5
054 O00AA00 N
058 A00AA00 N
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061 00AA00 10000000
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<PAGE> PAGE 6
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<PAGE> PAGE 7
070 B010100 N
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<PAGE> PAGE 8
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<PAGE> PAGE 9
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<PAGE> PAGE 10
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<PAGE> PAGE 11
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<PAGE> PAGE 12
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SIGNATURE JAMES O. YOST
TITLE ASSISTANT TREASURER
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM
THE FINANCIAL STATEMENTS OF MFS WORLDWIDE FIXED INCOME FUND AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<SERIES>
<NUMBER> 1
<NAME> MFS WORLDWIDE FIXED INCOME FUND
<S> <C>
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<PERIOD-END> DEC-31-1994
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</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM
THE FINANCIAL STATEMENTS OF MFS EMERGING EQUITIES FUND AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<SERIES>
<NUMBER> 2
<NAME> MFS EMERGING EQUITIES FUND
<S> <C>
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<PER-SHARE-NII> (0.01)
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</TABLE>
