<PAGE>
000 A000000 12/31/96
000 C000000 0000877232
000 D000000 N
000 E000000 NF
000 F000000 Y
000 G000000 N
000 H000000 N
000 I000000 3.0
000 J000000 A
001 A000000 GREEN CENTURY FUNDS
001 B000000 811-06351
001 C000000 6174820800
002 A000000 29 TEMPLE PLACE
002 B000000 BOSTON
002 C000000 MA
002 D010000 02111
003 000000 N
004 000000 N
005 000000 N
006 000000 N
007 A000000 Y
007 B000000 2
007 C010100 1
007 C010200 2
007 C020200 BALANCED FUND
007 C030200 N
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 GREEN CENTURY CAPITAL MANAGEMENT, INC.
010 B00AA01 801-39630
010 C01AA01 BOSTON
010 C02AA01 MA
010 C03AA01 02111
010 A00AA02 SIGNATURE BROKER-DEALER SERVICES, INC.
010 B00AA02 8-41134
010 C01AA02 BOSTON
010 C02AA02 MA
010 C03AA02 02116
011 A00AA01 SIGNATURE BROKER-DEALER SERVICES, INC.
011 B00AA01 8-41134
011 C01AA01 BOSTON
011 C02AA01 MA
011 C03AA01 02116
018 00AA00 Y
019 A00AA00 Y
<PAGE>
019 B00AA00 2
019 C00AA00 GREENCENTU
020 A000001 MERRILL LYNCH, PIERCE FENNER & SMITH
020 B000001 13-5674085
020 C000001 3
020 A000002 FIRST BOSTON
020 C000002 2
020 A000003 NATWEST SECURITIES CORP
020 B000003 13-3255839
020 C000003 2
020 A000004 INSTINET CORP
020 B000004 13-3443395
020 C000004 1
020 A000005 GOLDMAN SACHS
020 B000005 13-5108880
020 C000005 1
020 A000006 PAINE WEBBER
020 B000006 13-2638166
020 C000006 0
020 A000007 MOORS & CABOT
020 B000007 04-2644548
020 C000007 0
020 A000008 GRUNTAL & CO
020 B000008 13-3179859
020 C000008 0
020 A000009 SWISS AMERICAN SECURITIES
020 B000009 13-2741554
020 C000009 0
020 A000010 ADVEST INC
020 B000010 06-0950348
020 C000010 0
021 000000 10
022 A000001 SALOMON BROTHERS
022 B000001 13-3082694
022 C000001 24548
022 D000001 554
022 A000002 DILLON, READ & CO.
022 B000002 13-1939216
022 C000002 93
022 D000002 560
022 A000003 GOLDMAN, SACHS & CO.
022 B000003 13-5108880
022 C000003 269
022 D000003 294
022 A000004 PAINE WEBBER
022 B000004 13-2638166
022 C000004 251
022 D000004 282
022 A000005 NATWEST
022 B000005 13-3255839
022 C000005 379
<PAGE>
022 D000005 0
022 A000006 OPPENHEIMER & CO., INC.
022 B000006 13-2798343
022 C000006 81
022 D000006 255
022 A000007 PERSHING
022 B000007 13-2741729
022 C000007 298
022 D000007 0
022 A000008 GRUNTAL
022 B000008 13-3179859
022 C000008 158
022 D000008 94
022 A000009 HERZOG, HEINE, GEDULD, INC.
022 B000009 13-1955436
022 C000009 14
022 D000009 174
022 A000010 CANTOR FITZGERALD
022 B000010 13-3680187
022 C000010 177
022 D000010 0
023 C000000 27105
023 D000000 2533
024 00AA00 N
025 D00AA01 0
025 D00AA02 0
025 D00AA03 0
025 D00AA04 0
025 D00AA05 0
025 D00AA06 0
025 D00AA07 0
025 D00AA08 0
026 A000000 N
026 B000000 Y
026 C000000 N
026 D000000 Y
026 E000000 N
026 F000000 N
026 G010000 N
026 G020000 N
026 H000000 N
027 000000 Y
029 00AA00 N
030 A00AA00 0
030 B00AA00 0.00
030 C00AA00 0.00
031 A00AA00 0
031 B00AA00 0
032 00AA00 0
033 00AA00 0
034 00AA00 N
<PAGE>
035 00AA00 0
036 B00AA00 0
037 00AA00 N
038 00AA00 0
039 00AA00 N
040 00AA00 Y
041 00AA00 Y
049 00AA00 N
050 00AA00 N
051 00AA00 N
052 00AA00 N
053 A00AA00 Y
053 B00AA00 Y
053 C00AA00 N
054 A00AA00 Y
054 B00AA00 Y
054 C00AA00 Y
054 D00AA00 Y
054 E00AA00 N
054 F00AA00 Y
054 G00AA00 Y
054 H00AA00 Y
054 I00AA00 N
054 J00AA00 Y
054 K00AA00 Y
054 L00AA00 Y
054 M00AA00 Y
054 N00AA00 Y
054 O00AA00 Y
055 A00AA00 N
055 B00AA00 N
056 00AA00 Y
057 00AA00 N
058 A00AA00 N
059 00AA00 Y
060 A00AA00 Y
060 B00AA00 Y
061 00AA00 100
077 A000000 N
078 000000 N
080 A00AA00 CHUBB GROUP OF INSURANCE COMPANIES
080 C00AA00 175
081 A00AA00 Y
081 B00AA00 2
082 A00AA00 Y
082 B00AA00 10
083 A00AA00 N
083 B00AA00 0
084 A00AA00 N
084 B00AA00 0
085 A00AA00 Y
<PAGE>
085 B00AA00 N
086 A010000 0
086 A020000 0
086 B010000 0
086 B020000 0
086 C010000 0
086 C020000 0
086 D010000 0
086 D020000 0
086 E010000 0
086 E020000 0
086 F010000 0
086 F020000 0
008 A000201 GREEN CENTURY CAPITAL MANAGEMENT, INC.
008 B000201 A
008 C000201 801-39630
008 D010201 BOSTON
008 D020201 MA
008 D030201 02111
008 A000202 WINSLOW MANAGEMENT COMPANY
008 B000202 S
008 C000202 801-159300
008 D010202 BOSTON
008 D020202 MA
008 D030202 02110
012 A000201 INVESTORS BANK & TRUST COMPANY
012 B000201 84-0000000
012 C010201 BOSTON
012 C020201 MA
012 C030201 02110
013 A000201 KPMG PEAT MARWICK LLP
013 B010201 BOSTON
013 B020201 MA
013 B030201 02110
015 A000201 INVESTORS BANK & TRUST COMPANY
015 B000201 C
015 C010201 BOSTON
015 C020201 MA
015 C030201 02111
015 E010201 X
028 A010200 84
028 A020200 0
028 A030200 0
028 A040200 22
028 B010200 134
028 B020200 0
028 B030200 0
028 B040200 53
028 C010200 105
028 C020200 0
028 C030200 0
<PAGE>
028 C040200 20
028 D010200 124
028 D020200 0
028 D030200 0
028 D040200 9
028 E010200 68
028 E020200 0
028 E030200 0
028 E040200 8
028 F010200 104
028 F020200 607
028 F030200 0
028 F040200 46
028 G010200 616
028 G020200 607
028 G030200 0
028 G040200 158
028 H000200 0
042 A000200 100
042 B000200 0
042 C000200 0
042 D000200 0
042 E000200 0
042 F000200 0
042 G000200 0
042 H000200 0
043 000200 10
044 000200 2
045 000200 Y
046 000200 N
047 000200 Y
048 000200 0.750
048 A010200 0
048 A020200 0.000
048 B010200 0
048 B020200 0.000
048 C010200 0
048 C020200 0.000
048 D010200 0
048 D020200 0.000
048 E010200 0
048 E020200 0.000
048 F010200 0
048 F020200 0.000
048 G010200 0
048 G020200 0.000
048 H010200 0
048 H020200 0.000
048 I010200 0
048 I020200 0.000
048 J010200 0
<PAGE>
048 J020200 0.000
048 K010200 0
048 K020200 0.000
062 A000200 N
062 B000200 0.0
062 C000200 0.0
062 D000200 0.0
062 E000200 0.0
062 F000200 0.0
062 G000200 0.0
062 H000200 0.0
062 I000200 0.0
062 J000200 0.0
062 K000200 0.0
062 L000200 0.0
062 M000200 0.0
062 N000200 0.0
062 O000200 0.0
062 P000200 0.0
062 Q000200 0.0
062 R000200 0.0
063 A000200 0
063 B000200 0.0
066 A000200 Y
066 B000200 N
066 C000200 N
066 D000200 N
066 E000200 Y
066 F000200 N
066 G000200 N
067 000200 Y
068 A000200 N
068 B000200 N
069 000200 N
070 A010200 Y
070 A020200 Y
070 B010200 Y
070 B020200 Y
070 C010200 Y
070 C020200 N
070 D010200 Y
070 D020200 N
070 E010200 Y
070 E020200 N
070 F010200 Y
070 F020200 N
070 G010200 Y
070 G020200 N
070 H010200 Y
070 H020200 N
070 I010200 N
<PAGE>
070 I020200 N
070 J010200 Y
070 J020200 N
070 K010200 N
070 K020200 N
070 L010200 Y
070 L020200 Y
070 M010200 Y
070 M020200 N
070 N010200 Y
070 N020200 N
070 O010200 N
070 O020200 N
070 P010200 N
070 P020200 N
070 Q010200 N
070 Q020200 N
070 R010200 N
070 R020200 N
071 A000200 5265
071 B000200 4924
071 C000200 8189
071 D000200 60
072 A000200 6
072 B000200 118
072 C000200 13
072 D000200 0
072 E000200 0
072 F000200 32
072 G000200 64
072 H000200 0
072 I000200 0
072 J000200 0
072 K000200 0
072 L000200 0
072 M000200 0
072 N000200 0
072 O000200 0
072 P000200 0
072 Q000200 0
072 R000200 0
072 S000200 0
072 T000200 10
072 U000200 0
072 V000200 0
072 W000200 1
072 X000200 107
072 Y000200 0
072 Z000200 24
072AA000200 18
072BB000200 0
<PAGE>
072CC010200 599
072CC020200 0
072DD010200 34
072DD020200 0
072EE000200 1042
073 A010200 0.0530
073 A020200 0.0000
073 B000200 1.6020
073 C000200 0.0000
074 A000200 0
074 B000200 80
074 C000200 0
074 D000200 2166
074 E000200 0
074 F000200 6567
074 G000200 0
074 H000200 0
074 I000200 0
074 J000200 128
074 K000200 0
074 L000200 66
074 M000200 0
074 N000200 9007
074 O000200 143
074 P000200 19
074 Q000200 0
074 R010200 0
074 R020200 0
074 R030200 0
074 R040200 0
074 S000200 0
074 T000200 8845
074 U010200 699
074 U020200 0
074 V010200 12.65
074 V020200 0.00
074 W000200 0.0000
074 X000200 606
074 Y000200 0
075 A000200 0
075 B000200 8439
076 000200 0.00
SIGNATURE JOHN R. ELDER
TITLE ASSISTANT TREASURER
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
This schedule contains summary financial information extracted from the December
31, 1996 Green Century Funds Semi-Annual Report and is qualified in its entirety
by reference to such Semi-Annual Report.
</LEGEND>
<CIK> 0000877232
<NAME> GREEN CENTURY FUNDS
<SERIES>
<NUMBER> 02
<NAME> GREEN CENTURY BALANCED FUND
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> JUN-30-1997
<PERIOD-START> JUL-01-1996
<PERIOD-END> DEC-31-1996
<INVESTMENTS-AT-COST> 7,592,175
<INVESTMENTS-AT-VALUE> 8,813,257
<RECEIVABLES> 194,164
<ASSETS-OTHER> 0
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 9,007,421
<PAYABLE-FOR-SECURITIES> 143,205
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 19,346
<TOTAL-LIABILITIES> 162,551
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 7,724,243
<SHARES-COMMON-STOCK> 699,294
<SHARES-COMMON-PRIOR> 615,960
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 9,997
<ACCUMULATED-NET-GAINS> 0
<OVERDISTRIBUTION-GAINS> 90,458
<ACCUM-APPREC-OR-DEPREC> 1,221,082
<NET-ASSETS> 8,844,870
<DIVIDEND-INCOME> 13,460
<INTEREST-INCOME> 117,661
<OTHER-INCOME> 0
<EXPENSES-NET> 107,263
<NET-INVESTMENT-INCOME> 23,867
<REALIZED-GAINS-CURRENT> 17,560
<APPREC-INCREASE-CURRENT> 598,951
<NET-CHANGE-FROM-OPS> 640,378
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 34,479
<DISTRIBUTIONS-OF-GAINS> 1,042,169
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 46,595
<NUMBER-OF-SHARES-REDEEMED> 11,858
<SHARES-REINVESTED> 48,597
<NET-CHANGE-IN-ASSETS> 629,679
<ACCUMULATED-NII-PRIOR> 615
<ACCUMULATED-GAINS-PRIOR> 934,151
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 24,183
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 107,263
<AVERAGE-NET-ASSETS> 8,581,726
<PER-SHARE-NAV-BEGIN> 13.34
<PER-SHARE-NII> 0.033
<PER-SHARE-GAIN-APPREC> 0.932
<PER-SHARE-DIVIDEND> 0.053
<PER-SHARE-DISTRIBUTIONS> 1.602
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 12.65
<EXPENSE-RATIO> 2.50
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
