<PAGE>
000 A000000 04/30/98
000 C000000 0000898031
000 D000000 N
000 E000000 NF
000 F000000 Y
000 G000000 N
000 H000000 N
000 I000000 3.0
000 J000000 U
001 A000000 LORD ABBETT SECURITIES TRUST
001 B000000 811-7538
001 C000000 2128481870
002 A000000 767 FIFTH AVENUE
002 B000000 NEW YORK
002 C000000 NY
002 D010000 10153
002 D020000 0101
003 000000 N
004 000000 N
005 000000 N
006 000000 N
007 A000000 Y
007 B000000 4
007 C010100 1
007 C020100 GROWTH & INCOME TRUST
007 C030100 N
007 C010200 2
007 C020200 INTERNATIONAL TRUST
007 C030200 N
007 C010300 3
007 C020300 WORLD BOND DEBENTURE TRUST
007 C030300 N
007 C010400 4
007 C020400 ALPHA TRUST
007 C030400 N
007 C010500 5
007 C010600 6
007 C010700 7
007 C010800 8
007 C010900 9
007 C011000 10
011 A00AA01 LORD, ABBETT DISTRIBUTOR LLC
011 B00AA01 8-216
011 C01AA01 NEW YORK
011 C02AA01 NY
011 C03AA01 10153
011 C04AA01 0101
012 A00AA01 DST SYSTEMS INC.
012 B00AA01 84-448
012 C01AA01 KANSAS CITY
012 C02AA01 MO
<PAGE>
012 C03AA01 64141
013 A00AA01 DELOITTE & TOUCHE, LLP
013 B01AA01 NEW YORK
013 B02AA01 NY
013 B03AA01 10048
015 A00AA01 THE BANK OF NEW YORK
015 B00AA01 C
015 C01AA01 NEW YORK
015 C02AA01 NY
015 C03AA01 10015
015 E01AA01 X
018 00AA00 Y
019 A00AA00 Y
019 B00AA00 34
019 C00AA00 LORDABBETT
020 A000001 COMMERZBANK CAPITAL MARKETS CORP.
020 B000001 13-3439358
020 C000001 37
020 A000002 FOX-PITT, KELTON INC.
020 B000002 06-1058201
020 C000002 21
020 A000003 PEEL HUNT & CO. LTD
020 B000003 98-0165816
020 C000003 12
020 A000004 EDWARD D JONES & CO
020 B000004 43-0345811
020 C000004 11
020 A000005 STE DE BOURSE ODDO
020 B000005 13-3951910
020 C000005 9
020 A000006 SMITH BARNEY, HARRIS UPHAM
020 B000006 13-3224016
020 C000006 27
020 A000007 PRUDENTIAL SECURITIES, INC
020 B000007 22-2347336
020 C000007 7
020 A000008 JEFFERIES & CO., INC.
020 B000008 95-2622900
020 C000008 6
020 A000009 MML INVESTORS SERVICES, INC.
020 B000009 04-2746212
020 C000009 6
020 A000010 BEAR STEARNS & CO.
020 B000010 13-3299429
020 C000010 5
021 000000 206
022 A000001 AMERICAN EXPRESS CREDIT CO.
022 B000001 11-1988350
022 C000001 343914
022 D000001 340273
022 A000002 FUJI SECURITIES INC.
<PAGE>
022 B000002 36-2880742
022 C000002 226500
022 D000002 223000
022 A000003 FORD MOTOR CREDIT CO.
022 B000003 38-1612444
022 C000003 125545
022 D000003 129750
022 A000004 MERRILL LYNCH, PIERCE FENNER & SMITH INC.
022 B000004 13-5674085
022 C000004 53629
022 D000004 53410
022 A000005 DEAN WITTER REYNOLDS INC.
022 B000005 94-1671384
022 C000005 41860
022 D000005 41860
022 A000006 GENERAL ELECTRIC CAPITAL CORP.
022 B000006 13-5100700
022 C000006 21060
022 D000006 20895
022 A000007 PRUDENTIAL FUNDING CO.
022 B000007 22-2231168
022 C000007 5280
022 D000007 5280
022 A000008 MORGAN STANLEY & CO., INC.
022 B000008 13-2655998
022 C000008 486
022 D000008 1075
022 A000009 EVEREN SECURITIES
022 B000009 36-3223381
022 C000009 1075
022 D000009 1075
022 A000010 UTENDAHL CAPITAL PARTNERS, L.P.
022 B000010 13-3663000
022 C000010 800
022 D000010 800
023 C000000 821068
023 D000000 820002
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 Y
026 B000000 Y
026 C000000 N
026 D000000 Y
026 E000000 N
<PAGE>
026 F000000 N
026 G010000 N
026 G020000 N
027 000000 Y
037 00AA00 N
038 00AA00 0
039 00AA00 N
040 00AA00 Y
041 00AA00 Y
054 A00AA00 Y
054 B00AA00 Y
054 C00AA00 Y
054 D00AA00 N
054 E00AA00 N
054 F00AA00 N
054 G00AA00 Y
054 H00AA00 Y
054 I00AA00 N
054 J00AA00 Y
054 K00AA00 N
054 L00AA00 Y
054 M00AA00 N
054 N00AA00 N
054 O00AA00 N
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 1000
077 A000000 N
078 000000 N
080 C00AA00 0
081 B00AA00 0
082 B00AA00 0
083 B00AA00 0
084 B00AA00 0
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
<PAGE>
086 F020000 0
008 A000101 LORD ABBETT & CO.
008 B000101 A
008 C000101 801-6997
008 D010101 NEW YORK
008 D020101 NY
008 D030101 10153
008 D040101 0101
028 A010100 3361
028 A020100 9032
028 A030100 0
028 A040100 1663
028 B010100 2306
028 B020100 0
028 B030100 0
028 B040100 3873
028 C010100 2175
028 C020100 0
028 C030100 0
028 C040100 1660
028 D010100 2888
028 D020100 0
028 D030100 0
028 D040100 1337
028 E010100 2660
028 E020100 0
028 E030100 0
028 E040100 1832
028 F010100 2647
028 F020100 0
028 F030100 0
028 F040100 2194
028 G010100 16037
028 G020100 9032
028 G030100 0
028 G040100 12559
028 H000100 8510
029 000100 Y
030 A000100 189
030 B000100 5.75
030 C000100 0.00
031 A000100 27
031 B000100 0
032 000100 162
033 000100 0
034 000100 Y
035 000100 4
036 A000100 Y
036 B000100 0
042 A000100 0
042 B000100 0
<PAGE>
042 C000100 0
042 D000100 100
042 E000100 0
042 F000100 0
042 G000100 0
042 H000100 0
043 000100 533
044 000100 0
045 000100 Y
046 000100 N
047 000100 Y
048 000100 0.750
048 A010100 0
048 A020100 0.000
048 B010100 0
048 B020100 0.000
048 C010100 0
048 C020100 0.000
048 D010100 0
048 D020100 0.000
048 E010100 0
048 E020100 0.000
048 F010100 0
048 F020100 0.000
048 G010100 0
048 G020100 0.000
048 H010100 0
048 H020100 0.000
048 I010100 0
048 I020100 0.000
048 J010100 0
048 J020100 0.000
048 K010100 0
048 K020100 0.000
049 000100 N
050 000100 N
051 000100 N
052 000100 N
053 A000100 N
062 A000100 N
062 B000100 0.0
062 C000100 0.0
062 D000100 0.0
062 E000100 0.0
062 F000100 0.0
062 G000100 0.0
062 H000100 0.0
062 I000100 0.0
062 J000100 0.0
062 K000100 0.0
062 L000100 0.0
<PAGE>
062 M000100 0.0
062 N000100 0.0
062 O000100 0.0
062 P000100 0.0
062 Q000100 0.0
062 R000100 0.0
063 A000100 0
063 B000100 0.0
070 A010100 Y
070 A020100 N
070 B010100 Y
070 B020100 N
070 C010100 N
070 C020100 N
070 D010100 N
070 D020100 N
070 E010100 N
070 E020100 N
070 F010100 N
070 F020100 N
070 G010100 N
070 G020100 N
070 H010100 N
070 H020100 N
070 I010100 N
070 I020100 N
070 J010100 Y
070 J020100 Y
070 K010100 N
070 K020100 N
070 L010100 Y
070 L020100 N
070 M010100 N
070 M020100 N
070 N010100 N
070 N020100 N
070 O010100 Y
070 O020100 N
070 P010100 N
070 P020100 N
070 Q010100 N
070 Q020100 N
070 R010100 N
070 R020100 N
071 A000100 39811
071 B000100 36795
071 C000100 153954
071 D000100 24
072 A000100 6
072 B000100 116
072 C000100 1568
<PAGE>
072 D000100 0
072 E000100 0
072 F000100 584
072 G000100 0
072 H000100 0
072 I000100 92
072 J000100 0
072 K000100 0
072 L000100 29
072 M000100 0
072 N000100 18
072 O000100 0
072 P000100 0
072 Q000100 0
072 R000100 16
072 S000100 3
072 T000100 533
072 U000100 4
072 V000100 0
072 W000100 18
072 X000100 1297
072 Y000100 0
072 Z000100 387
072AA000100 10218
072BB000100 798
072CC010100 14523
072CC020100 0
072DD010100 661
072DD020100 351
072EE000100 9622
073 A010100 0.0000
073 A020100 0.0000
073 B000100 0.5900
073 C000100 0.0000
074 A000100 147
074 B000100 0
074 C000100 3275
074 D000100 0
074 E000100 0
074 F000100 166103
074 G000100 0
074 H000100 0
074 I000100 0
074 J000100 747
074 K000100 0
074 L000100 471
074 M000100 0
074 N000100 170743
074 O000100 78
074 P000100 0
074 Q000100 0
<PAGE>
074 R010100 0
074 R020100 0
074 R030100 0
074 R040100 407
074 S000100 0
074 T000100 170258
074 U010100 7461
074 U020100 203
074 V010100 9.62
074 V020100 9.61
074 W000100 0.0000
074 X000100 12733
074 Y000100 0
075 A000100 0
075 B000100 158096
076 000100 0.00
008 A000201 LORD, ABBETT & CO.
008 B000201 A
008 C000201 801-6997
008 D010201 NEW YORK
008 D020201 NY
008 D030201 10153
008 D040201 0101
008 A000202 FUJI INVESTMENT MANAGEMENTS CO.(EUROPE), LTD.
008 B000202 S
008 C000202 801-53290
008 D010202 LONDON
008 D050202 ENGLAND
008 D060202 EC2M7HJ
028 A010200 2178
028 A020200 72
028 A030200 0
028 A040200 2176
028 B010200 2602
028 B020200 0
028 B030200 0
028 B040200 505
028 C010200 2529
028 C020200 0
028 C030200 0
028 C040200 269
028 D010200 4198
028 D020200 0
028 D030200 0
028 D040200 351
028 E010200 12318
028 E020200 0
028 E030200 0
028 E040200 595
028 F010200 17619
028 F020200 0
<PAGE>
028 F030200 0
028 F040200 398
028 G010200 41444
028 G020200 72
028 G030200 0
028 G040200 4294
028 H000200 21829
029 000200 Y
030 A000200 549
030 B000200 5.75
030 C000200 0.00
031 A000200 77
031 B000200 0
032 000200 472
033 000200 0
034 000200 Y
035 000200 3
036 A000200 Y
036 B000200 0
042 A000200 0
042 B000200 0
042 C000200 0
042 D000200 100
042 E000200 0
042 F000200 0
042 G000200 0
042 H000200 0
043 000200 88
044 000200 0
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
<PAGE>
048 J010200 0
048 J020200 0.000
048 K010200 0
048 K020200 0.000
049 000200 N
050 000200 N
051 000200 N
052 000200 N
053 A000200 N
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
070 A010200 Y
070 A020200 N
070 B010200 Y
070 B020200 N
070 C010200 Y
070 C020200 N
070 D010200 N
070 D020200 N
070 E010200 N
070 E020200 N
070 F010200 N
070 F020200 N
070 G010200 N
070 G020200 N
070 H010200 Y
070 H020200 N
070 I010200 N
070 I020200 N
070 J010200 Y
070 J020200 N
070 K010200 N
070 K020200 N
<PAGE>
070 L010200 Y
070 L020200 Y
070 M010200 Y
070 M020200 Y
070 N010200 Y
070 N020200 N
070 O010200 Y
070 O020200 N
070 P010200 N
070 P020200 N
070 Q010200 N
070 Q020200 N
070 R010200 N
070 R020200 N
071 A000200 39036
071 B000200 5618
071 C000200 50445
071 D000200 11
072 A000200 6
072 B000200 64
072 C000200 348
072 D000200 0
072 E000200 0
072 F000200 191
072 G000200 0
072 H000200 0
072 I000200 50
072 J000200 0
072 K000200 0
072 L000200 7
072 M000200 0
072 N000200 33
072 O000200 0
072 P000200 0
072 Q000200 0
072 R000200 7
072 S000200 1
072 T000200 88
072 U000200 3
072 V000200 0
072 W000200 14
072 X000200 394
072 Y000200 0
072 Z000200 18
072AA000200 334
072BB000200 999
072CC010200 16319
072CC020200 0
072DD010200 0
072DD020200 0
072EE000200 0
<PAGE>
073 A010200 0.0000
073 A020200 0.0000
073 B000200 0.0000
073 C000200 0.0000
074 A000200 117
074 B000200 0
074 C000200 3499
074 D000200 0
074 E000200 0
074 F000200 83814
074 G000200 0
074 H000200 0
074 I000200 0
074 J000200 0
074 K000200 0
074 L000200 2694
074 M000200 45
074 N000200 90169
074 O000200 15
074 P000200 0
074 Q000200 0
074 R010200 0
074 R020200 0
074 R030200 0
074 R040200 0
074 S000200 0
074 T000200 90154
074 U010200 4363
074 U020200 767
074 V010200 14.59
074 V020200 14.60
074 W000200 0.0000
074 X000200 8570
074 Y000200 0
075 A000200 0
075 B000200 51651
076 000200 0.00
008 A000301 LORD, ABBETT & C0.
008 B000301 A
008 C000301 801-6997
008 D010301 NEW YORK
008 D020301 NY
008 D030301 10153
008 D040301 0101
008 A000302 FUJI INVESTMENT MANAGEMENT CO. (EUROPE), LTD.
008 B000302 S
008 C000302 801-53290
008 D010302 LONDON
008 D050302 ENGLAND
008 D060302 EC2M7HJ
028 A010300 0
<PAGE>
028 A020300 0
028 A030300 0
028 A040300 0
028 B010300 1000
028 B020300 1001
028 B030300 0
028 B040300 0
028 C010300 0
028 C020300 0
028 C030300 0
028 C040300 0
028 D010300 289
028 D020300 0
028 D030300 0
028 D040300 0
028 E010300 1288
028 E020300 0
028 E030300 0
028 E040300 0
028 F010300 0
028 F020300 0
028 F030300 0
028 F040300 0
028 G010300 2577
028 G020300 1001
028 G030300 0
028 G040300 0
028 H000300 900
029 000300 Y
030 A000300 21
030 B000300 5.75
030 C000300 0.00
031 A000300 3
031 B000300 0
032 000300 18
033 000300 0
034 000300 Y
035 000300 0
036 A000300 Y
036 B000300 0
042 A000300 0
042 B000300 0
042 C000300 0
042 D000300 0
042 E000300 0
042 F000300 0
042 G000300 0
042 H000300 0
043 000300 0
044 000300 0
045 000300 Y
<PAGE>
046 000300 N
047 000300 Y
048 000300 0.750
048 A010300 0
048 A020300 0.000
048 B010300 0
048 B020300 0.000
048 C010300 0
048 C020300 0.000
048 D010300 0
048 D020300 0.000
048 E010300 0
048 E020300 0.000
048 F010300 0
048 F020300 0.000
048 G010300 0
048 G020300 0.000
048 H010300 0
048 H020300 0.000
048 I010300 0
048 I020300 0.000
048 J010300 0
048 J020300 0.000
048 K010300 0
048 K020300 0.000
049 000300 N
050 000300 N
051 000300 N
052 000300 N
053 A000300 Y
053 B000300 N
053 C000300 Y
062 A000300 Y
062 B000300 0.0
062 C000300 0.0
062 D000300 0.0
062 E000300 0.0
062 F000300 0.0
062 G000300 0.0
062 H000300 0.0
062 I000300 22.7
062 J000300 0.0
062 K000300 0.0
062 L000300 0.0
062 M000300 0.0
062 N000300 0.0
062 O000300 0.0
062 P000300 26.8
062 Q000300 54.5
062 R000300 0.0
063 A000300 0
<PAGE>
063 B000300 10.4
064 A000300 N
064 B000300 N
066 A000300 Y
066 B000300 N
066 C000300 N
066 D000300 N
066 E000300 N
066 F000300 N
066 G000300 Y
067 000300 N
068 A000300 N
068 B000300 Y
069 000300 N
070 A010300 Y
070 A020300 N
070 B010300 Y
070 B020300 N
070 C010300 Y
070 C020300 N
070 D010300 N
070 D020300 N
070 E010300 N
070 E020300 N
070 F010300 N
070 F020300 N
070 G010300 N
070 G020300 N
070 H010300 N
070 H020300 N
070 I010300 N
070 I020300 N
070 J010300 Y
070 J020300 Y
070 K010300 N
070 K020300 N
070 L010300 Y
070 L020300 Y
070 M010300 Y
070 M020300 Y
070 N010300 Y
070 N020300 N
070 O010300 Y
070 O020300 N
070 P010300 N
070 P020300 N
070 Q010300 N
070 Q020300 N
070 R010300 N
070 R020300 N
071 A000300 5192
<PAGE>
071 B000300 2249
071 C000300 2156
071 D000300 104
072 A000300 4
072 B000300 65
072 C000300 0
072 D000300 0
072 E000300 0
072 F000300 6
072 G000300 0
072 H000300 0
072 I000300 0
072 J000300 0
072 K000300 0
072 L000300 0
072 M000300 0
072 N000300 0
072 O000300 0
072 P000300 0
072 Q000300 0
072 R000300 1
072 S000300 0
072 T000300 0
072 U000300 1
072 V000300 0
072 W000300 0
072 X000300 8
072 Y000300 6
072 Z000300 63
072AA000300 54
072BB000300 17
072CC010300 41
072CC020300 0
072DD010300 0
072DD020300 0
072EE000300 0
073 A010300 0.0000
073 A020300 0.0000
073 B000300 0.0000
073 C000300 0.0000
074 A000300 2
074 B000300 0
074 C000300 845
074 D000300 2996
074 E000300 0
074 F000300 24
074 G000300 0
074 H000300 0
074 I000300 0
074 J000300 330
074 K000300 0
<PAGE>
074 L000300 278
074 M000300 2
074 N000300 4477
074 O000300 759
074 P000300 0
074 Q000300 0
074 R010300 0
074 R020300 0
074 R030300 0
074 R040300 0
074 S000300 0
074 T000300 3718
074 U010300 310
074 U020300 29
074 V010300 10.69
074 V020300 10.68
074 W000300 0.0000
074 X000300 86
074 Y000300 258
075 A000300 0
075 B000300 2311
076 000300 0.00
028 A010400 0
028 A020400 0
028 A030400 0
028 A040400 0
028 B010400 0
028 B020400 10
028 B030400 0
028 B040400 0
028 C010400 0
028 C020400 0
028 C030400 0
028 C040400 0
028 D010400 7606
028 D020400 0
028 D030400 0
028 D040400 0
028 E010400 21197
028 E020400 0
028 E030400 0
028 E040400 12
028 F010400 0
028 F020400 0
028 F030400 0
028 F040400 309
028 G010400 28803
028 G020400 10
028 G030400 0
028 G040400 321
028 H000400 0
<PAGE>
029 000400 Y
030 A000400 461
030 B000400 5.75
030 C000400 0.00
031 A000400 63
031 B000400 0
032 000400 398
033 000400 0
034 000400 Y
035 000400 0
036 A000400 Y
036 B000400 0
042 A000400 0
042 B000400 0
042 C000400 0
042 D000400 0
042 E000400 0
042 F000400 0
042 G000400 0
042 H000400 0
043 000400 9
044 000400 0
045 000400 Y
046 000400 N
047 000400 Y
048 000400 0.500
048 A010400 0
048 A020400 0.000
048 B010400 0
048 B020400 0.000
048 C010400 0
048 C020400 0.000
048 D010400 0
048 D020400 0.000
048 E010400 0
048 E020400 0.000
048 F010400 0
048 F020400 0.000
048 G010400 0
048 G020400 0.000
048 H010400 0
048 H020400 0.000
048 I010400 0
048 I020400 0.000
048 J010400 0
048 J020400 0.000
048 K010400 0
048 K020400 0.000
049 000400 N
050 000400 N
051 000400 N
<PAGE>
052 000400 N
053 A000400 Y
053 B000400 N
053 C000400 Y
062 A000400 N
062 B000400 0.0
062 C000400 0.0
062 D000400 0.0
062 E000400 0.0
062 F000400 0.0
062 G000400 0.0
062 H000400 0.0
062 I000400 0.0
062 J000400 0.0
062 K000400 0.0
062 L000400 0.0
062 M000400 0.0
062 N000400 0.0
062 O000400 0.0
062 P000400 0.0
062 Q000400 0.0
062 R000400 0.0
063 A000400 0
063 B000400 0.0
066 A000400 Y
066 B000400 N
066 C000400 Y
066 D000400 N
066 E000400 N
066 F000400 N
066 G000400 N
067 000400 N
068 A000400 N
068 B000400 N
069 000400 N
070 A010400 Y
070 A020400 N
070 B010400 Y
070 B020400 N
070 C010400 Y
070 C020400 N
070 D010400 N
070 D020400 N
070 E010400 N
070 E020400 N
070 F010400 N
070 F020400 N
070 G010400 N
070 G020400 N
070 H010400 Y
070 H020400 N
<PAGE>
070 I010400 N
070 I020400 N
070 J010400 Y
070 J020400 Y
070 K010400 Y
070 K020400 Y
070 L010400 Y
070 L020400 Y
070 M010400 Y
070 M020400 Y
070 N010400 Y
070 N020400 N
070 O010400 Y
070 O020400 N
070 P010400 N
070 P020400 N
070 Q010400 N
070 Q020400 N
070 R010400 N
070 R020400 N
071 A000400 27571
071 B000400 0
071 C000400 5837
071 D000400 0
072 A000400 4
072 B000400 2
072 C000400 0
072 D000400 0
072 E000400 0
072 F000400 8
072 G000400 0
072 H000400 0
072 I000400 0
072 J000400 0
072 K000400 0
072 L000400 0
072 M000400 0
072 N000400 0
072 O000400 0
072 P000400 0
072 Q000400 0
072 R000400 0
072 S000400 9
072 T000400 9
072 U000400 0
072 V000400 0
072 W000400 0
072 X000400 17
072 Y000400 8
072 Z000400 -7
072AA000400 0
<PAGE>
072BB000400 0
072CC010400 271
072CC020400 0
072DD010400 0
072DD020400 0
072EE000400 0
073 A010400 0.0000
073 A020400 0.0000
073 B000400 0.0000
073 C000400 0.0000
074 A000400 1
074 B000400 0
074 C000400 196
074 D000400 0
074 E000400 0
074 F000400 0
074 G000400 0
074 H000400 0
074 I000400 27841
074 J000400 0
074 K000400 0
074 L000400 4250
074 M000400 33
074 N000400 32321
074 O000400 3535
074 P000400 0
074 Q000400 0
074 R010400 0
074 R020400 0
074 R030400 0
074 R040400 32
074 S000400 0
074 T000400 28754
074 U010400 849
074 U020400 656
074 V010400 16.05
074 V020400 16.07
074 W000400 0.0000
074 X000400 2221
074 Y000400 0
075 A000400 0
075 B000400 4800
076 000400 0.00
SIGNATURE JOSEPH VAN DYKE
TITLE ASSISTANT TREASURER
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000898031
<NAME> LORD ABBETT SECURITIES TRUST
<SERIES>
<NUMBER> 011
<NAME> GROWTH & INCOME SERIES - CLASS A
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-START> NOV-01-1997
<PERIOD-END> APR-30-1998
<INVESTMENTS-AT-COST> 111413538
<INVESTMENTS-AT-VALUE> 166093930
<RECEIVABLES> 1217451
<ASSETS-OTHER> 3431301
<OTHER-ITEMS-ASSETS> 373
<TOTAL-ASSETS> 170743055
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 485009
<TOTAL-LIABILITIES> 485009
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 105869362
<SHARES-COMMON-STOCK> 7461257
<SHARES-COMMON-PRIOR> 6698803
<ACCUMULATED-NII-CURRENT> 1299486
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 9348254
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 54680392
<NET-ASSETS> 170694546
<DIVIDEND-INCOME> 653083
<INTEREST-INCOME> 48469
<OTHER-INCOME> 0
<EXPENSES-NET> 394228
<NET-INVESTMENT-INCOME> 307324
<REALIZED-GAINS-CURRENT> 9419952
<APPREC-INCREASE-CURRENT> 14522585
<NET-CHANGE-FROM-OPS> 24329979
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 3955820
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 944791
<NUMBER-OF-SHARES-REDEEMED> 628600
<SHARES-REINVESTED> 446263
<NET-CHANGE-IN-ASSETS> 27266370
<ACCUMULATED-NII-PRIOR> 887952
<ACCUMULATED-GAINS-PRIOR> 9550322
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 246934
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 394228
<AVERAGE-NET-ASSETS> 65849138
<PER-SHARE-NAV-BEGIN> 8.79
<PER-SHARE-NII> .04
<PER-SHARE-GAIN-APPREC> 1.38
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> .59
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 9.62
<EXPENSE-RATIO> .60
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000898031
<NAME> LORD ABBETT SECURITIES TRUST
<SERIES>
<NUMBER> 012
<NAME> GROWTH & INCOME SERIES - CLASS B
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-START> NOV-01-1997
<PERIOD-END> APR-30-1998
<INVESTMENTS-AT-COST> 111413538
<INVESTMENTS-AT-VALUE> 166093930
<RECEIVABLES> 1217451
<ASSETS-OTHER> 3431301
<OTHER-ITEMS-ASSETS> 373
<TOTAL-ASSETS> 170743055
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 485009
<TOTAL-LIABILITIES> 485009
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 105869362
<SHARES-COMMON-STOCK> 202809
<SHARES-COMMON-PRIOR> 37720
<ACCUMULATED-NII-CURRENT> 824
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 9348254
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 54680392
<NET-ASSETS> 170694546
<DIVIDEND-INCOME> 11215
<INTEREST-INCOME> 808
<OTHER-INCOME> 0
<EXPENSES-NET> 11220
<NET-INVESTMENT-INCOME> 803
<REALIZED-GAINS-CURRENT> 9419952
<APPREC-INCREASE-CURRENT> 14522585
<NET-CHANGE-FROM-OPS> 24329979
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 22529
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 169090
<NUMBER-OF-SHARES-REDEEMED> 6737
<SHARES-REINVESTED> 2736
<NET-CHANGE-IN-ASSETS> 27266370
<ACCUMULATED-NII-PRIOR> 22
<ACCUMULATED-GAINS-PRIOR> 9550322
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 4350
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 11220
<AVERAGE-NET-ASSETS> 1158383
<PER-SHARE-NAV-BEGIN> 8.80
<PER-SHARE-NII> .01
<PER-SHARE-GAIN-APPREC> 1.39
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> .59
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 9.61
<EXPENSE-RATIO> .97
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<NAME> LORD ABBETT SECURITIES TRUST
<CIK> 0000898031
<SERIES>
<NUMBER> 013
<NAME> GROWTH & INCOME SERIES - CLASS C
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-START> NOV-01-1997
<PERIOD-END> APR-30-1998
<INVESTMENTS-AT-COST> 111413538
<INVESTMENTS-AT-VALUE> 166093930
<RECEIVABLES> 1217451
<ASSETS-OTHER> 3431301
<OTHER-ITEMS-ASSETS> 373
<TOTAL-ASSETS> 170743055
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 485009
<TOTAL-LIABILITIES> 485009
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 105869362
<SHARES-COMMON-STOCK> 10071133
<SHARES-COMMON-PRIOR> 9521881
<ACCUMULATED-NII-CURRENT> 276724
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 9348254
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 54680392
<NET-ASSETS> 170694546
<DIVIDEND-INCOME> 903616
<INTEREST-INCOME> 67042
<OTHER-INCOME> 0
<EXPENSES-NET> 891343
<NET-INVESTMENT-INCOME> 79315
<REALIZED-GAINS-CURRENT> 9419952
<APPREC-INCREASE-CURRENT> 14522585
<NET-CHANGE-FROM-OPS> 24329979
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 5643671
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 661463
<NUMBER-OF-SHARES-REDEEMED> 760670
<SHARES-REINVESTED> 648459
<NET-CHANGE-IN-ASSETS> 27266370
<ACCUMULATED-NII-PRIOR> 187999
<ACCUMULATED-GAINS-PRIOR> 9550322
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 341416
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 891343
<AVERAGE-NET-ASSETS> 91044381
<PER-SHARE-NAV-BEGIN> 8.80
<PER-SHARE-NII> .01
<PER-SHARE-GAIN-APPREC> 1.37
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> .59
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 9.59
<EXPENSE-RATIO> .98
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000898031
<NAME> LORD ABBETT SECURITIES TRUST
<SERIES>
<NUMBER> 021
<NAME> INTERNATIONAL SERIES - CLASS A
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-START> NOV-01-1997
<PERIOD-END> APR-30-1998
<INVESTMENTS-AT-COST> 64809670
<INVESTMENTS-AT-VALUE> 83814195
<RECEIVABLES> 2692343
<ASSETS-OTHER> 3616964
<OTHER-ITEMS-ASSETS> 45510
<TOTAL-ASSETS> 90169012
<PAYABLE-FOR-SECURITIES> 15526
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 0
<TOTAL-LIABILITIES> 15526
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 72307143
<SHARES-COMMON-STOCK> 4362613
<SHARES-COMMON-PRIOR> 3015007
<ACCUMULATED-NII-CURRENT> 199728
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (1163360)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 19004525
<NET-ASSETS> 90153486
<DIVIDEND-INCOME> 273827
<INTEREST-INCOME> 54044
<OTHER-INCOME> 0
<EXPENSES-NET> 302324
<NET-INVESTMENT-INCOME> 25547
<REALIZED-GAINS-CURRENT> (664506)
<APPREC-INCREASE-CURRENT> 16319247
<NET-CHANGE-FROM-OPS> 15672824
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 75253
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 1690567
<NUMBER-OF-SHARES-REDEEMED> 349662
<SHARES-REINVESTED> 6701
<NET-CHANGE-IN-ASSETS> 52818986
<ACCUMULATED-NII-PRIOR> 216089
<ACCUMULATED-GAINS-PRIOR> (498854)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 159214
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 302324
<AVERAGE-NET-ASSETS> 42456986
<PER-SHARE-NAV-BEGIN> 10.86
<PER-SHARE-NII> .01
<PER-SHARE-GAIN-APPREC> 3.75
<PER-SHARE-DIVIDEND> .03
<PER-SHARE-DISTRIBUTIONS> .00
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 14.59
<EXPENSE-RATIO> .71
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000898031
<NAME> LORD ABBETT SECURITIES TRUST
<SERIES>
<NUMBER> 022
<NAME> INTERNATIONAL SERIES - CLASS B
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-START> NOV-01-1997
<PERIOD-END> APR-30-1998
<INVESTMENTS-AT-COST> 64809670
<INVESTMENTS-AT-VALUE> 83814195
<RECEIVABLES> 2692343
<ASSETS-OTHER> 3616964
<OTHER-ITEMS-ASSETS> 45510
<TOTAL-ASSETS> 90169012
<PAYABLE-FOR-SECURITIES> 15526
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 0
<TOTAL-LIABILITIES> 15526
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 72307143
<SHARES-COMMON-STOCK> 489889
<SHARES-COMMON-PRIOR> 152446
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 10366
<ACCUMULATED-NET-GAINS> (1163360)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 19004525
<NET-ASSETS> 90153486
<DIVIDEND-INCOME> 25372
<INTEREST-INCOME> 4560
<OTHER-INCOME> 0
<EXPENSES-NET> 36545
<NET-INVESTMENT-INCOME> (6613)
<REALIZED-GAINS-CURRENT> (664506)
<APPREC-INCREASE-CURRENT> 16319247
<NET-CHANGE-FROM-OPS> 15672824
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 350317
<NUMBER-OF-SHARES-REDEEMED> 12874
<SHARES-REINVESTED> 0
<NET-CHANGE-IN-ASSETS> 52818986
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> (498854)
<OVERDISTRIB-NII-PRIOR> 3507
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 12744
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 36545
<AVERAGE-NET-ASSETS> 3398302
<PER-SHARE-NAV-BEGIN> 10.83
<PER-SHARE-NII> (.03)
<PER-SHARE-GAIN-APPREC> 3.72
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 14.52
<EXPENSE-RATIO> 1.08
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000898031
<NAME> LORD ABBETT SECURITIES TRUST
<SERIES>
<NUMBER> 023
<NAME> INTERNATIONAL SERIES - CLASS C
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-START> NOV-01-1997
<PERIOD-END> APR-30-1998
<INVESTMENTS-AT-COST> 64809670
<INVESTMENTS-AT-VALUE> 83814195
<RECEIVABLES> 2692343
<ASSETS-OTHER> 3616964
<OTHER-ITEMS-ASSETS> 45510
<TOTAL-ASSETS> 90169012
<PAYABLE-FOR-SECURITIES> 15526
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 0
<TOTAL-LIABILITIES> 15526
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 72307143
<SHARES-COMMON-STOCK> 565542
<SHARES-COMMON-PRIOR> 270455
<ACCUMULATED-NII-CURRENT> 51025
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (1163360)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 19004525
<NET-ASSETS> 90153486
<DIVIDEND-INCOME> 31388
<INTEREST-INCOME> 5921
<OTHER-INCOME> 0
<EXPENSES-NET> 49083
<NET-INVESTMENT-INCOME> (11774)
<REALIZED-GAINS-CURRENT> (664506)
<APPREC-INCREASE-CURRENT> 16319247
<NET-CHANGE-FROM-OPS> 15672824
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 301907
<NUMBER-OF-SHARES-REDEEMED> 6820
<SHARES-REINVESTED> 0
<NET-CHANGE-IN-ASSETS> 52818986
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> (498854)
<OVERDISTRIB-NII-PRIOR> 7300
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 17002
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 49083
<AVERAGE-NET-ASSETS> 4533839
<PER-SHARE-NAV-BEGIN> 10.83
<PER-SHARE-NII> (.03)
<PER-SHARE-GAIN-APPREC> 3.72
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 14.52
<EXPENSE-RATIO> 1.08
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000898031
<NAME> LORD ABBETT SECURITIES TRUST
<SERIES>
<NUMBER> 025
<NAME> INTERNATIONAL SERIES - CLASS Y
<S> <C>
<PERIOD-TYPE> 4-MOS
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-START> DEC-30-1997
<PERIOD-END> APR-30-1998
<INVESTMENTS-AT-COST> 64809670
<INVESTMENTS-AT-VALUE> 83814195
<RECEIVABLES> 2692343
<ASSETS-OTHER> 3616964
<OTHER-ITEMS-ASSETS> 45510
<TOTAL-ASSETS> 90169012
<PAYABLE-FOR-SECURITIES> 15526
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 0
<TOTAL-LIABILITIES> 15526
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 72307143
<SHARES-COMMON-STOCK> 766798
<SHARES-COMMON-PRIOR> 0
<ACCUMULATED-NII-CURRENT> 10928
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (1163360)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 19004525
<NET-ASSETS> 90153486
<DIVIDEND-INCOME> 14832
<INTEREST-INCOME> 2153
<OTHER-INCOME> 0
<EXPENSES-NET> 6062
<NET-INVESTMENT-INCOME> 10923
<REALIZED-GAINS-CURRENT> (664506)
<APPREC-INCREASE-CURRENT> 16319247
<NET-CHANGE-FROM-OPS> 15672824
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 766798
<NUMBER-OF-SHARES-REDEEMED> 0
<SHARES-REINVESTED> 0
<NET-CHANGE-IN-ASSETS> 52818986
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> (498854)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 4537
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 6062
<AVERAGE-NET-ASSETS> 1824994
<PER-SHARE-NAV-BEGIN> 11.28
<PER-SHARE-NII> .09
<PER-SHARE-GAIN-APPREC> 3.23
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 14.60
<EXPENSE-RATIO> .33
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000898031
<NAME> LORD ABBETT SECURITIES TRUST
<SERIES>
<NUMBER> 031
<NAME> WORLD BOND-EBENTURE SERIES - CLASS A
<S> <C>
<PERIOD-TYPE> 4-MOS
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-START> DEC-18-1997
<PERIOD-END> APR-30-1998
<INVESTMENTS-AT-COST> 2957082
<INVESTMENTS-AT-VALUE> 2998150
<RECEIVABLES> 706626
<ASSETS-OTHER> 846593
<OTHER-ITEMS-ASSETS> 111
<TOTAL-ASSETS> 4551480
<PAYABLE-FOR-SECURITIES> 758853
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 74446
<TOTAL-LIABILITIES> 833299
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 3576683
<SHARES-COMMON-STOCK> 309750
<SHARES-COMMON-PRIOR> 0
<ACCUMULATED-NII-CURRENT> 61706
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 37740
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 41068
<NET-ASSETS> 3718181
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 63633
<OTHER-INCOME> 0
<EXPENSES-NET> 1926
<NET-INVESTMENT-INCOME> 61707
<REALIZED-GAINS-CURRENT> 37740
<APPREC-INCREASE-CURRENT> 41078
<NET-CHANGE-FROM-OPS> 141499
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 309750
<NUMBER-OF-SHARES-REDEEMED> 0
<SHARES-REINVESTED> 0
<NET-CHANGE-IN-ASSETS> 3718172
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 6244
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 8170
<AVERAGE-NET-ASSETS> 2266079
<PER-SHARE-NAV-BEGIN> 10.00
<PER-SHARE-NII> .20
<PER-SHARE-GAIN-APPREC> .49
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 10.69
<EXPENSE-RATIO> .09
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000898031
<NAME> LORD ABBETT SECURITIES TRUST
<SERIES>
<NUMBER> 032
<NAME> WORLD BOND-DEBENTURE SERIES - CLASS B
<S> <C>
<PERIOD-TYPE> 4-MOS
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-START> DEC-19-1997
<PERIOD-END> APR-30-1998
<INVESTMENTS-AT-COST> 2957082
<INVESTMENTS-AT-VALUE> 2998150
<RECEIVABLES> 706626
<ASSETS-OTHER> 846593
<OTHER-ITEMS-ASSETS> 111
<TOTAL-ASSETS> 4551480
<PAYABLE-FOR-SECURITIES> 758853
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 74446
<TOTAL-LIABILITIES> 833299
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 3576683
<SHARES-COMMON-STOCK> 9237
<SHARES-COMMON-PRIOR> 0
<ACCUMULATED-NII-CURRENT> 375
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 37740
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 41068
<NET-ASSETS> 3718181
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 417
<OTHER-INCOME> 0
<EXPENSES-NET> 42
<NET-INVESTMENT-INCOME> 375
<REALIZED-GAINS-CURRENT> 37740
<APPREC-INCREASE-CURRENT> 41078
<NET-CHANGE-FROM-OPS> 141499
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 9237
<NUMBER-OF-SHARES-REDEEMED> 0
<SHARES-REINVESTED> 0
<NET-CHANGE-IN-ASSETS> 3718172
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 45
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 87
<AVERAGE-NET-ASSETS> 15929
<PER-SHARE-NAV-BEGIN> 10.00
<PER-SHARE-NII> .04
<PER-SHARE-GAIN-APPREC> .64
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 10.68
<EXPENSE-RATIO> .26
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000898031
<NAME> LORD ABBETT SECURITIES TRUST
<SERIES>
<NUMBER> 033
<NAME> WORLD BOND-DEBENTURE SERIES - CLASS C
<S> <C>
<PERIOD-TYPE> 4-MOS
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-START> DEC-19-1997
<PERIOD-END> APR-30-1998
<INVESTMENTS-AT-COST> 2957082
<INVESTMENTS-AT-VALUE> 2998150
<RECEIVABLES> 706626
<ASSETS-OTHER> 846593
<OTHER-ITEMS-ASSETS> 111
<TOTAL-ASSETS> 4551480
<PAYABLE-FOR-SECURITIES> 758853
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 74446
<TOTAL-LIABILITIES> 833299
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 3576683
<SHARES-COMMON-STOCK> 29015
<SHARES-COMMON-PRIOR> 0
<ACCUMULATED-NII-CURRENT> 599
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 37740
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 41068
<NET-ASSETS> 3718181
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 714
<OTHER-INCOME> 0
<EXPENSES-NET> 115
<NET-INVESTMENT-INCOME> 599
<REALIZED-GAINS-CURRENT> 37740
<APPREC-INCREASE-CURRENT> 41078
<NET-CHANGE-FROM-OPS> 141499
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 29015
<NUMBER-OF-SHARES-REDEEMED> 0
<SHARES-REINVESTED> 0
<NET-CHANGE-IN-ASSETS> 3718172
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 74
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 189
<AVERAGE-NET-ASSETS> 29245
<PER-SHARE-NAV-BEGIN> 10.00
<PER-SHARE-NII> .02
<PER-SHARE-GAIN-APPREC> .65
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 10.67
<EXPENSE-RATIO> .39
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000898031
<NAME> LORD ABBETT SECURITIES TRUST
<SERIES>
<NUMBER> 041
<NAME> ALPHA SERIES - CLASS A
<S> <C>
<PERIOD-TYPE> 4-MOS
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-START> DEC-29-1997
<PERIOD-END> APR-30-1998
<INVESTMENTS-AT-COST> 27570896
<INVESTMENTS-AT-VALUE> 27841661
<RECEIVABLES> 4250385
<ASSETS-OTHER> 196820
<OTHER-ITEMS-ASSETS> 33352
<TOTAL-ASSETS> 32322218
<PAYABLE-FOR-SECURITIES> 3535048
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 32465
<TOTAL-LIABILITIES> 3567513
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 28491466
<SHARES-COMMON-STOCK> 849008
<SHARES-COMMON-PRIOR> 0
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 882
<ACCUMULATED-NET-GAINS> 0
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 270765
<NET-ASSETS> 28754705
<DIVIDEND-INCOME> 8
<INTEREST-INCOME> 1062
<OTHER-INCOME> 0
<EXPENSES-NET> 1951
<NET-INVESTMENT-INCOME> (881)
<REALIZED-GAINS-CURRENT> 0
<APPREC-INCREASE-CURRENT> 270765
<NET-CHANGE-FROM-OPS> 263239
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 854399
<NUMBER-OF-SHARES-REDEEMED> 5391
<SHARES-REINVESTED> 0
<NET-CHANGE-IN-ASSETS> 28754705
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 4106
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 6057
<AVERAGE-NET-ASSETS> 2436926
<PER-SHARE-NAV-BEGIN> 13.52
<PER-SHARE-NII> (.01)
<PER-SHARE-GAIN-APPREC> 2.56
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 16.07
<EXPENSE-RATIO> .08
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000898031
<NAME> LORD ABBETT SECURITIES TRUST
<SERIES>
<NUMBER> 042
<NAME> ALPHA SERIES - CLASS B
<S> <C>
<PERIOD-TYPE> 4-MOS
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-START> DEC-29-1997
<PERIOD-END> APR-30-1998
<INVESTMENTS-AT-COST> 27570896
<INVESTMENTS-AT-VALUE> 27841661
<RECEIVABLES> 4250385
<ASSETS-OTHER> 196820
<OTHER-ITEMS-ASSETS> 33352
<TOTAL-ASSETS> 32322218
<PAYABLE-FOR-SECURITIES> 3535048
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 32465
<TOTAL-LIABILITIES> 3567513
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 28491466
<SHARES-COMMON-STOCK> 656270
<SHARES-COMMON-PRIOR> 0
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 4745
<ACCUMULATED-NET-GAINS> 0
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 270765
<NET-ASSETS> 28754705
<DIVIDEND-INCOME> 1
<INTEREST-INCOME> 677
<OTHER-INCOME> 0
<EXPENSES-NET> 5422
<NET-INVESTMENT-INCOME> (4744)
<REALIZED-GAINS-CURRENT> 0
<APPREC-INCREASE-CURRENT> 270765
<NET-CHANGE-FROM-OPS> 263239
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 668746
<NUMBER-OF-SHARES-REDEEMED> 12476
<SHARES-REINVESTED> 0
<NET-CHANGE-IN-ASSETS> 28754705
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 2865
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 8287
<AVERAGE-NET-ASSETS> 1700630
<PER-SHARE-NAV-BEGIN> 13.52
<PER-SHARE-NII> (.05)
<PER-SHARE-GAIN-APPREC> 2.58
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 16.05
<EXPENSE-RATIO> .32
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000898031
<NAME> LORD ABBETT SECURITIES TRUST
<SERIES>
<NUMBER> 043
<NAME> ALPHA SERIES - CLASS C
<S> <C>
<PERIOD-TYPE> 4-MOS
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-START> DEC-29-1997
<PERIOD-END> APR-30-1998
<INVESTMENTS-AT-COST> 27570896
<INVESTMENTS-AT-VALUE> 27841661
<RECEIVABLES> 4250385
<ASSETS-OTHER> 196820
<OTHER-ITEMS-ASSETS> 33352
<TOTAL-ASSETS> 32322218
<PAYABLE-FOR-SECURITIES> 3535048
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 32465
<TOTAL-LIABILITIES> 3567513
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 28491466
<SHARES-COMMON-STOCK> 285401
<SHARES-COMMON-PRIOR> 0
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 1900
<ACCUMULATED-NET-GAINS> 0
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 270765
<NET-ASSETS> 28754705
<DIVIDEND-INCOME> 1
<INTEREST-INCOME> 198
<OTHER-INCOME> 0
<EXPENSES-NET> 2099
<NET-INVESTMENT-INCOME> (1900)
<REALIZED-GAINS-CURRENT> 0
<APPREC-INCREASE-CURRENT> 270765
<NET-CHANGE-FROM-OPS> 263239
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 287687
<NUMBER-OF-SHARES-REDEEMED> 2286
<SHARES-REINVESTED> 0
<NET-CHANGE-IN-ASSETS> 28754705
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 1117
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 3216
<AVERAGE-NET-ASSETS> 662934
<PER-SHARE-NAV-BEGIN> 13.52
<PER-SHARE-NII> (.05)
<PER-SHARE-GAIN-APPREC> 2.58
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 16.05
<EXPENSE-RATIO> .32
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
