SEI INSTITUTIONAL INVESTMENTS TRUST
NSAR-A, 1998-01-29
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<PAGE>      PAGE  1
000 A000000 11/30/97
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001 A000000 SEI INSTITUTIONAL INVESTMENTS TRUST
001 B000000 811-7257
001 C000000 8003425734
002 A000000 2 OLIVER STREET
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002 C000000 MA
002 D010000 02109
003  000000 N
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007 C010100  1
007 C020100 LARGE CAP FUND
007 C030100 N
007 C010200  2
007 C020200 SMALL CAP FUND
007 C030200 N
007 C010300  3
007 C020300 CORE FIXED INCOME FUND
007 C030300 N
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007 C010500  5
007 C010600  6
007 C010700  7
007 C020700 INTERNATIONAL EQUITY FUND
007 C030700 N
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007 C010900  9
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011 A00AA01 SEI INVESTMENTS MANAGEMENT CORPORATION
011 B00AA01 8-27897
011 C01AA01 OAKS
011 C02AA01 PA
011 C03AA01 19456
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020 A000001 SALOMON BROTHERS
020 B000001 13-3082694
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020 A000002 SMITH BARNEY
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<PAGE>      PAGE  2
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020 C000005     42
020 A000006 MORGAN STANLEY
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020 C000006     31
020 A000007 EXECUTION SERVICES
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020 C000007     29
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<PAGE>      PAGE  3
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<PAGE>      PAGE  4
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<PAGE>      PAGE  5
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<PAGE>      PAGE  7
008 A000201 SEI INVESTMENTS MANAGEMENT CORPORATION
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<PAGE>      PAGE  8
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<PAGE>      PAGE  9
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008 A000301 SEI INVESTMENTS MANAGEMENT CORPORATION
<PAGE>      PAGE  10
008 B000301 A
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008 D040301 1100
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008 D010302 PASADENA
008 D020302 CA
008 D030302 91105
008 A000303 FIRSTAR INVESTMENT RESEARCH & MANAGEMENT CO
008 B000303 S
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008 D010303 MILWAUKEE
008 D020303 WI
008 D030303 53202
024  000300 Y
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<PAGE>      PAGE  11
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SIGNATURE   STEVE MEYER                                  
TITLE       CONTROLLER          
 


<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000939934
<NAME> SEI INSTITUTIONAL INVESTMENTS TRUST
<SERIES>
   <NUMBER> 010
   <NAME> LARGE CAP FUND
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<S>                             <C>
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