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<PAGE> PAGE 2
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<PAGE> PAGE 3
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<PAGE> PAGE 6
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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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<PAGE> PAGE 13
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<PAGE> PAGE 17
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SIGNATURE DOUGLAS A. ROMICH
TITLE ASSISTANT TREASURER
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
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WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
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<NAME> STATE STREET RESEARCH INSTITUTIONAL FUNDS
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WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
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<NAME> STATE STREET RESEARCH INSTITUTIONAL FUNDS
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WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
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<NAME> STATE STREET RESEARCH INSTITUTIONAL FUNDS
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WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
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<NAME> STATE STREET RESEARCH INSTITUTIONAL FUNDS
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WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
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<NAME> STATE STREET RESEARCH INSTITUTIONAL FUNDS
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WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0001080727
<NAME> STATE STREET RESEARCH INSTITUTIONAL FUNDS
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WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0001080727
<NAME> STATE STREET RESEARCH INSTITUTIONAL FUNDS
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WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
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<CIK> 0001080727
<NAME> STATE STREET RESEARCH INSTITUTIONAL FUNDS
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<PER-SHARE-NAV-END> 9.86
<EXPENSE-RATIO> 0.50
[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
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<NAME> STATE STREET RESEARCH INSTITUTIONAL FUNDS
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<NAME> STATE STREET RESEARCH CORE FIXED INCOME CLASS II
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[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0
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WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0001080727
<NAME> STATE STREET RESEARCH INSTITUTIONAL FUNDS
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<NAME> STATE STREET RESEARCH CORE FIXED INCOME CLASS III
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[AVG-DEBT-OUTSTANDING] 0
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</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0001080727
<NAME> STATE STREET RESEARCH INSTITUTIONAL FUNDS
<SERIES>
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<NAME> STATE STREET RESEARCH CORE FIXED INCOME CLASS IV
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[AVG-DEBT-OUTSTANDING] 0
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</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0001080727
<NAME> STATE STREET RESEARCH INSTITUTIONAL FUNDS
<SERIES>
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[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0001080727
<NAME> STATE STREET RESEARCH INSTITUTIONAL FUNDS
<SERIES>
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[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0001080727
<NAME> STATE STREET RESEARCH INSTITUTIONAL FUNDS
<SERIES>
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<NAME> STATE STREET RESEARCH LARGE CAP GROWTH FUND CLASS III
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[AVG-DEBT-OUTSTANDING] 0
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</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0001080727
<NAME> STATE STREET RESEARCH INSTITUTIONAL FUNDS
<SERIES>
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<NAME> STATE STREET RESEARCH LARGE CAP GROWTH FUND CLASS IV
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