<PAGE> PAGE 1
000 B000000 10/27/95
000 C000000 846591
000 D000000 Y
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 Y
005 000000 N
006 000000 N
007 A000000 Y
007 B000000 1
007 C010100 1
007 C020100 VANGUARD INSTITUTIONAL MONEY MARKET PORTFOLIO
007 C030100 Y
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
018 00AA00 Y
019 A00AA00 Y
019 B00AA00 89
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 DRESDNER BANK
022 B000001 04-2442748
<PAGE> PAGE 2
022 C000001 1527437
022 D000001 0
022 A000002 BEAR STEARNS & CO.
022 B000002 13-3299429
022 C000002 961100
022 D000002 0
022 A000003 SBC CAPITAL MARKETS INC.
022 C000003 877703
022 D000003 0
022 A000004 GREENWICH CAPITAL MARKETS INC.
022 B000004 13-3172275
022 C000004 696779
022 D000004 0
022 A000005 CITICORP SECURITIES INC.
022 B000005 13-3144415
022 C000005 504019
022 D000005 0
022 A000006 GOLDMAN SACHS & CO.
022 B000006 13-5108880
022 C000006 304837
022 D000006 15198
022 A000007 CHASE SECURITIES INC.
022 B000007 13-3112953
022 C000007 315000
022 D000007 0
022 A000008 LEHMAN BROTHERS GOVERNMENT SECURITIES
022 B000008 13-2726611
022 C000008 274300
022 D000008 0
022 A000009 FIRST CHICAGO CAPITAL MARKETS INC.
022 B000009 3635959424
022 C000009 230000
022 D000009 0
022 A000010 CS FIRST BOSTON CORP.
022 B000010 13-5659485
022 C000010 206456
022 D000010 0
023 C000000 8211098
023 D000000 27648
077 A000000 Y
077 B000000 N
077 C000000 Y
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
<PAGE> PAGE 3
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 150000
081 A00AA00 Y
081 B00AA00 113
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 12378
028 A020100 2785
028 A030100 0
028 A040100 11251
028 B010100 27778
028 B020100 2821
028 B030100 0
028 B040100 20960
028 C010100 44825
028 C020100 2885
028 C030100 0
028 C040100 12956
028 D010100 16139
028 D020100 2846
028 D030100 0
028 D040100 29876
028 E010100 77841
028 E020100 0
028 E030100 0
028 E040100 14891
028 F010100 0
028 F020100 0
028 F030100 0
028 F040100 0
028 G010100 178961
028 G020100 11337
028 G030100 0
028 G040100 89934
028 H000100 0
062 A000100 Y
062 B000100 0.0
<PAGE> PAGE 4
062 C000100 0.8
062 D000100 10.8
062 E000100 0.0
062 F000100 16.2
062 G000100 9.5
062 H000100 2.8
062 I000100 58.7
062 J000100 0.0
062 K000100 0.0
062 L000100 1.4
062 M000100 0.0
062 N000100 0.0
062 O000100 0.0
062 P000100 0.0
062 Q000100 0.0
062 R000100 -0.2
063 A000100 46
063 B000100 0.0
064 A000100 N
071 A000100 0
071 B000100 0
071 C000100 0
071 D000100 0
072 A000100 11
072 B000100 35746
072 C000100 0
072 D000100 0
072 E000100 0
072 F000100 78
072 G000100 525
072 H000100 0
072 I000100 6
072 J000100 44
072 K000100 0
072 L000100 17
072 M000100 2
072 N000100 0
072 O000100 45
072 P000100 0
072 Q000100 0
072 R000100 6
072 S000100 0
072 T000100 169
072 U000100 0
072 V000100 1
072 W000100 0
072 X000100 893
072 Y000100 0
072 Z000100 34853
072AA000100 2
072BB000100 1
<PAGE> PAGE 5
072CC010100 0
072CC020100 0
072DD010100 34853
072DD020100 0
072EE000100 0
073 A010100 0.0540
073 A020100 0.0000
073 B000100 0.0000
073 C000100 0.0000
074 A000100 1
074 B000100 79007
074 C000100 656370
074 D000100 0
074 E000100 0
074 F000100 0
074 G000100 0
074 H000100 0
074 I000100 82
074 J000100 0
074 K000100 0
074 L000100 2170
074 M000100 0
074 N000100 737630
074 O000100 0
074 P000100 0
074 Q000100 0
074 R010100 0
074 R020100 0
074 R030100 0
074 R040100 3301
074 S000100 0
074 T000100 734329
074 U010100 734334
074 U020100 0
074 V010100 1.00
074 V020100 0.00
074 W000100 1.0000
074 X000100 37
074 Y000100 0
075 A000100 595425
075 B000100 0
076 000100 0.00
SIGNATURE GARY P. SOURA
TITLE SR. MANAGER
<TABLE> <S> <C>
<ARTICLE> 6
<RESTATED>
<CIK> 0000846591
<NAME> VANGUARD INSTITUTIONAL PORTFOLIOS, INC.
<SERIES>
<NUMBER> 001
<NAME> VANGUARD INSTITUTIONAL MONEY MARKET PORTFOLIO
<MULTIPLIER> 1,000
<CURRENCY> US
<S> <C>
<PERIOD-TYPE> OTHER
<FISCAL-YEAR-END> NOV-30-1995
<PERIOD-START> DEC-01-1994
<PERIOD-END> OCT-27-1995
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 735377
<INVESTMENTS-AT-VALUE> 735377
<RECEIVABLES> 2170
<ASSETS-OTHER> 83
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 737630
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 3301
<TOTAL-LIABILITIES> 3301
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 734334
<SHARES-COMMON-STOCK> 734334
<SHARES-COMMON-PRIOR> 676928
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (5)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 0
<NET-ASSETS> 734329
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 35746
<OTHER-INCOME> 0
<EXPENSES-NET> 893
<NET-INVESTMENT-INCOME> 34853
<REALIZED-GAINS-CURRENT> 1
<APPREC-INCREASE-CURRENT> 0
<NET-CHANGE-FROM-OPS> 34854
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 34853
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 440782
<NUMBER-OF-SHARES-REDEEMED> 411508
<SHARES-REINVESTED> 28132
<NET-CHANGE-IN-ASSETS> 57407
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> (5)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 78
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 893
<AVERAGE-NET-ASSETS> 595425
<PER-SHARE-NAV-BEGIN> 1.00
<PER-SHARE-NII> 0.054
<PER-SHARE-GAIN-APPREC> 0
<PER-SHARE-DIVIDEND> 0.054
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 1.00
<EXPENSE-RATIO> 0.15
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
