<PAGE> PAGE 1
000 B000000 11/30/94
000 C000000 846591
000 D000000 N
000 E000000 NF
000 F000000 Y
000 G000000 N
000 H000000 N
000 I000000 3.0.a
000 J000000 U
001 A000000 VANGUARD INSTITUTIONAL PORTFOLIOS, INC.
001 B000000 811-5768
001 C000000 6106691000
002 A000000 100 VANGUARD BOULEVARD
002 B000000 MALVERN
002 C000000 PA
002 D010000 19355
003 000000 N
004 000000 N
005 000000 N
006 000000 N
007 A000000 Y
007 B000000 1
007 C010100 1
007 C020100 VANGUARD INSTITUTIONAL MONEY MARKET PORTFOLIO
007 C030100 N
007 C010200 2
007 C010300 3
007 C010400 4
007 C010500 5
007 C010600 6
007 C010700 7
007 C010800 8
007 C010900 9
007 C011000 10
010 A00AA01 THE VANGUARD GROUP, INC.
010 B00AA01 801-11953
010 C01AA01 MALVERN
010 C02AA01 PA
010 C03AA01 19355
012 A00AA01 THE VANGUARD GROUP, INC.
012 B00AA01 84-772
012 C01AA01 MALVERN
012 C02AA01 PA
012 C03AA01 19355
013 A00AA01 PRICE WATERHOUSE LLP
013 B01AA01 PHILADELPHIA
013 B02AA01 PA
013 B03AA01 19103
018 00AA00 Y
019 A00AA00 Y
019 B00AA00 86
<PAGE> PAGE 2
019 C00AA00 VANGUARDGR
020 C000001 0
020 C000002 0
020 C000003 0
020 C000004 0
020 C000005 0
020 C000006 0
020 C000007 0
020 C000008 0
020 C000009 0
020 C000010 0
021 000000 0
022 A000001 EASTBRIDGE CAPITAL, INC.
022 B000001 13-3501117
022 C000001 1132263
022 D000001 0
022 A000002 GOLDMAN SACHS & CO.
022 B000002 13-5108880
022 C000002 813573
022 D000002 0
022 A000003 LEHMAN BROTHERS INC.
022 B000003 13-2518466
022 C000003 407814
022 D000003 0
022 A000004 CANTOR, FITZGERALD & CO., INC.
022 B000004 95-1786286
022 C000004 398775
022 D000004 0
022 A000005 MERRILL LYNCH PIERCE FENNER & SMITH
022 B000005 13-5674085
022 C000005 376199
022 D000005 12996
022 A000006 BT SECURITIES CORPORATION
022 B000006 13-3311934
022 C000006 260668
022 D000006 4978
022 A000007 FIRST BOSTON CORP.
022 B000007 13-5659485
022 C000007 214540
022 D000007 0
022 A000008 J.P. MORGAN SECURITIES, INC.
022 B000008 13-3224016
022 C000008 157755
022 D000008 0
022 A000009 CHASE SECURITIES, INC.
022 B000009 13-3112953
022 C000009 109293
022 D000009 0
022 A000010 CANADIAN IMPERIAL BANK OF COMMERCE
022 C000010 106431
022 D000010 0
<PAGE> PAGE 3
023 C000000 5467244
023 D000000 30898
077 A000000 Y
077 B000000 Y
077 C000000 N
077 D000000 N
077 E000000 N
077 F000000 N
077 G000000 N
077 H000000 N
077 I000000 N
077 J000000 N
077 K000000 N
077 L000000 N
077 M000000 N
077 N000000 N
077 O000000 N
077 P000000 N
077 Q010000 N
077 Q020000 N
077 Q030000 N
078 000000 N
080 A00AA00 ICI MUTUAL INSURANCE COMPANY
080 C00AA00 130000
081 A00AA00 Y
081 B00AA00 109
082 A00AA00 N
082 B00AA00 0
083 A00AA00 N
083 B00AA00 0
084 A00AA00 N
084 B00AA00 0
085 A00AA00 Y
085 B00AA00 N
028 A010100 38421
028 A020100 1512
028 A030100 0
028 A040100 4090
028 B010100 56434
028 B020100 1823
028 B030100 0
028 B040100 5906
028 C010100 39556
028 C020100 1998
028 C030100 0
028 C040100 24375
028 D010100 43235
028 D020100 2095
028 D030100 0
028 D040100 17856
028 E010100 18362
<PAGE> PAGE 4
028 E020100 2271
028 E030100 0
028 E040100 37177
028 F010100 75193
028 F020100 2434
028 F030100 0
028 F040100 15301
028 G010100 271201
028 G020100 12133
028 G030100 0
028 G040100 104705
028 H000100 0
062 A000100 Y
062 B000100 0.0
062 C000100 6.7
062 D000100 0.0
062 E000100 0.0
062 F000100 12.8
062 G000100 5.8
062 H000100 1.3
062 I000100 69.5
062 J000100 0.0
062 K000100 0.0
062 L000100 4.4
062 M000100 0.0
062 N000100 0.0
062 O000100 0.0
062 P000100 0.0
062 Q000100 0.0
062 R000100 0.3
063 A000100 38
063 B000100 0.0
064 A000100 N
071 A000100 0
071 B000100 0
071 C000100 0
071 D000100 0
072 A000100 12
072 B000100 21060
072 C000100 0
072 D000100 0
072 E000100 0
072 F000100 48
072 G000100 475
072 H000100 0
072 I000100 9
072 J000100 30
072 K000100 0
072 L000100 10
072 M000100 2
072 N000100 0
<PAGE> PAGE 5
072 O000100 36
072 P000100 0
072 Q000100 0
072 R000100 7
072 S000100 0
072 T000100 117
072 U000100 0
072 V000100 1
072 W000100 0
072 X000100 735
072 Y000100 0
072 Z000100 20325
072AA000100 1
072BB000100 6
072CC010100 0
072CC020100 0
072DD010100 20325
072DD020100 0
072EE000100 0
073 A010100 0.0400
073 A020100 0.0000
073 B000100 0.0000
073 C000100 0.0000
074 A000100 1
074 B000100 0
074 C000100 674888
074 D000100 0
074 E000100 0
074 F000100 0
074 G000100 0
074 H000100 0
074 I000100 105
074 J000100 0
074 K000100 0
074 L000100 2795
074 M000100 0
074 N000100 677789
074 O000100 0
074 P000100 201
074 Q000100 0
074 R010100 0
074 R020100 0
074 R030100 0
074 R040100 666
074 S000100 0
074 T000100 676922
074 U010100 676928
074 U020100 0
074 V010100 1.00
074 V020100 0.00
074 W000100 1.0000
<PAGE> PAGE 6
074 X000100 42
074 Y000100 0
075 A000100 490275
075 B000100 0
076 000100 0.00
SIGNATURE GARY P. SOURA
TITLE ASST. VICE PRESIDENT
<TABLE> <S> <C>
<ARTICLE> 6
<RESTATED>
<CIK> 0000846591
<NAME> VANGUARD INSTITUTIONAL PORTFOLIOS, INC.
<SERIES>
<NUMBER> 1
<NAME> VANGUARD INSTITUTIONAL MONEY MARKET PORTFOLIO
<MULTIPLIER> 1,000
<CURRENCY> US
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> NOV-30-1994
<PERIOD-START> DEC-01-1993
<PERIOD-END> NOV-30-1994
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 674888
<INVESTMENTS-AT-VALUE> 674888
<RECEIVABLES> 2795
<ASSETS-OTHER> 106
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 677789
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 867
<TOTAL-LIABILITIES> 867
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 676928
<SHARES-COMMON-STOCK> 676928
<SHARES-COMMON-PRIOR> 305552
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (6)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 0
<NET-ASSETS> 676922
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 21060
<OTHER-INCOME> 0
<EXPENSES-NET> 735
<NET-INVESTMENT-INCOME> 20325
<REALIZED-GAINS-CURRENT> (5)
<APPREC-INCREASE-CURRENT> 0
<NET-CHANGE-FROM-OPS> 20320
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 20325
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 532376
<NUMBER-OF-SHARES-REDEEMED> 179410
<SHARES-REINVESTED> 18410
<NET-CHANGE-IN-ASSETS> 371376
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> (1)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 48
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 735
<AVERAGE-NET-ASSETS> 490275
<PER-SHARE-NAV-BEGIN> 1.000
<PER-SHARE-NII> 0.040
<PER-SHARE-GAIN-APPREC> 0.000
<PER-SHARE-DIVIDEND> 0.040
<PER-SHARE-DISTRIBUTIONS> 0.000
<RETURNS-OF-CAPITAL> 0.000
<PER-SHARE-NAV-END> 1.000
<EXPENSE-RATIO> 0.002
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
