<PAGE> PAGE 1
000 A000000 11/30/93
000 C000000 055627
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 KEYSTONE CUSTODIAN FUND, SERIES S-4
001 B000000 811-101
001 C000000 6173383200
002 A000000 200 BERKELEY STREET
002 B000000 BOSTON
002 C000000 MA
002 D010000 02116
003 000000 N
004 000000 N
005 000000 N
006 000000 N
007 A000000 N
007 B000000 0
020 A000001 INSTINET
020 B000001 13-3443395
020 C000001 84
020 A000002 DONALDSON
020 B000002 13-2741729
020 C000002 56
020 A000003 PAINE WEBBER
020 B000003 13-2638166
020 C000003 49
020 A000004 GOLDMAN SACHS
020 B000004 13-5108880
020 C000004 40
020 A000005 BROWN ALEX
020 C000005 30
020 A000006 LAWRENCE
020 B000006 13-2730828
020 C000006 26
020 A000007 WERTHEIM
020 C000007 25
020 A000008 MERRILL LYNCH
020 B000008 13-5674085
020 C000008 22
020 A000009 FA CTSET
020 B000009 13-2953224
020 C000009 22
020 A000010 KOKUSAI
020 B000010 13-3431243
020 C000010 22
021 000000 376
<PAGE> PAGE 2
022 A000001 SMITH BARNEY
022 B000001 13-1912900
022 C000001 379731
022 D000001 8161
022 A000002 KIDDER PEABODY
022 B000002 13-5650440
022 C000002 243059
022 D000002 2827
022 A000003 CARROLL MCENTEE
022 B000003 13-2650272
022 C000003 240016
022 D000003 0
022 A000004 PRUDENTAIL BACHE
022 B000004 22-2347336
022 C000004 220675
022 D000004 6017
022 A000005 GOLDMAN SACHS
022 B000005 13-5108880
022 C000005 193935
022 D000005 3732
022 A000006 ADAMS HART
022 C000006 72863
022 D000006 0
022 A000007 PAINE WEBBER
022 B000007 13-2638166
022 C000007 57828
022 D000007 13707
022 A000008 NOMURA SECURITIES
022 B000008 13-2642206
022 C000008 58402
022 D000008 0
022 A000009 GREENWICH
022 B000009 13-2697091
022 C000009 50411
022 D000009 0
022 A000010 LINCOLN
022 C000010 31557
022 D000010 0
023 C000000 1548477
023 D000000 34444
028 A010000 36053
028 A020000 60903
028 A030000 0
028 A040000 29854
028 B010000 49362
028 B020000 0
028 B030000 0
028 B040000 29562
028 C010000 40109
028 C020000 0
028 C030000 0
<PAGE> PAGE 3
028 C040000 35597
028 D010000 31555
028 D020000 0
028 D030000 0
028 D040000 66446
028 E010000 34173
028 E020000 17742
028 E030000 0
028 E040000 44872
028 F010000 43260
028 F020000 0
028 F030000 0
028 F040000 39321
028 G010000 234512
028 G020000 78645
028 G030000 0
028 G040000 245652
028 H000000 0
042 A000000 0
042 B000000 0
042 C000000 100
042 D000000 0
042 E000000 0
042 F000000 0
042 G000000 0
042 H000000 0
043 000000 4743
044 000000 0
062 A000000 N
062 B000000 0.0
062 C000000 0.0
062 D000000 0.0
062 E000000 0.0
062 F000000 0.0
062 G000000 0.0
062 H000000 0.0
062 I000000 0.0
062 J000000 0.0
062 K000000 0.0
062 L000000 0.0
062 M000000 0.0
062 N000000 0.0
062 O000000 0.0
062 P000000 0.0
062 Q000000 0.0
062 R000000 0.0
071 A000000 321004
071 B000000 339767
071 C000000 1020410
071 D000000 31
072 A000000 6
<PAGE> PAGE 4
072 B000000 106
072 C000000 1052
072 D000000 0
072 E000000 0
072 F000000 2696
072 G000000 0
072 H000000 0
072 I000000 1047
072 J000000 206
072 K000000 44
072 L000000 30
072 M000000 11
072 N000000 33
072 O000000 0
072 P000000 0
072 Q000000 21
072 R000000 22
072 S000000 18
072 T000000 4743
072 U000000 0
072 V000000 0
072 W000000 22
072 X000000 8893
072 Y000000 0
072 Z000000 -7735
072AA000000 62
072BB000000 0
072CC010000 44
072CC020000 0
072DD010000 0
072DD020000 0
072EE000000 101724
073 A010000 0.0000
073 A020000 0.0000
073 B000000 0.7900
073 C000000 0.0000
074 A000000 1
074 B000000 30971
074 C000000 96
074 D000000 0
074 E000000 0
074 F000000 979175
074 G000000 0
074 H000000 0
074 I000000 5660
074 J000000 29763
074 K000000 0
074 L000000 5000
074 M000000 45
074 N000000 1050711
074 O000000 14
<PAGE> PAGE 5
074 P000000 0
074 Q000000 0
074 R010000 20404
074 R020000 0
074 R030000 0
074 R040000 0
074 S000000 0
074 T000000 1030293
074 U010000 131101
074 U020000 0
074 V010000 7.86
074 V020000 0.00
074 W000000 0.0000
074 X000000 59118
074 Y000000 0
075 A000000 1020410
075 B000000 0
076 000000 0.00
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
SIGNATURE KEVIN J. MORRISSEY
TITLE ASSISTANT TREASURER