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<PAGE> PAGE 2
012 C03AA01 10017
013 A00AA01 DELOITTE & TOUCHE LLP
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013 B02AA01 NY
013 B03AA01 10281
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<PAGE> PAGE 3
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<PAGE> PAGE 4
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<PAGE> PAGE 5
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<PAGE> PAGE 6
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<PAGE> PAGE 7
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<PAGE> PAGE 8
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<PAGE> PAGE 9
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<PAGE> PAGE 10
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<PAGE> PAGE 11
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<PAGE> PAGE 12
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<PAGE> PAGE 13
SIGNATURE THOMAS G. ROSE
TITLE TREASURER
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER> 011
<NAME> SELIGMAN LARGE-CAP VALUE FUND CLASS A
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-1999
<PERIOD-END> JUN-30-1998
<INVESTMENTS-AT-COST> 155349
<INVESTMENTS-AT-VALUE> 180614
<RECEIVABLES> 1349
<ASSETS-OTHER> 51
<OTHER-ITEMS-ASSETS> 59
<TOTAL-ASSETS> 182073
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<SHARES-REINVESTED> 0<F1>
<NET-CHANGE-IN-ASSETS> 31144
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<ACCUMULATED-GAINS-PRIOR> (600)
<OVERDISTRIB-NII-PRIOR> (1)
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<FN>
<F1>CLASS A ONLY. ALL OTHER DATA ARE FUND LEVEL.
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WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER> 012
<NAME> SELIGMAN LARGE-CAP VALUE FUND CLASS B
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-1999
<PERIOD-END> JUN-30-1998
<INVESTMENTS-AT-COST> 155349
<INVESTMENTS-AT-VALUE> 180614
<RECEIVABLES> 1349
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<SHARES-REINVESTED> 0<F1>
<NET-CHANGE-IN-ASSETS> 31144
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> (600)
<OVERDISTRIB-NII-PRIOR> (1)
<OVERDIST-NET-GAINS-PRIOR> 0
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<PER-SHARE-NII> (.01)<F1>
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[AVG-DEBT-OUTSTANDING] 0
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<FN>
<F1>CLASS B ONLY. ALL OTHER DATA ARE FUND LEVEL.
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</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER> 013
<NAME> SELIGMAN LARGE-CAP VALUE FUND CLASS C
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<ACCUMULATED-GAINS-PRIOR> (600)
<OVERDISTRIB-NII-PRIOR> (1)
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[AVG-DEBT-PER-SHARE] 0
<FN>
<F1>CLASS C ONLY. ALL OTHER DATA ARE FUND LEVEL.
</FN>
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER> 014
<NAME> SELIGMAN LARGE-CAP VALUE FUND CLASS D
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-1999
<PERIOD-END> JUN-30-1998
<INVESTMENTS-AT-COST> 155349
<INVESTMENTS-AT-VALUE> 180614
<RECEIVABLES> 1349
<ASSETS-OTHER> 51
<OTHER-ITEMS-ASSETS> 59
<TOTAL-ASSETS> 182073
<PAYABLE-FOR-SECURITIES> 1691
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 713
<TOTAL-LIABILITIES> 2404
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 154577
<SHARES-COMMON-STOCK> 4685<F1>
<SHARES-COMMON-PRIOR> 4308<F1>
<ACCUMULATED-NII-CURRENT> 23
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (196)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 25265
<NET-ASSETS> 51377<F1>
<DIVIDEND-INCOME> 457<F1>
<INTEREST-INCOME> 6<F1>
<OTHER-INCOME> 0<F1>
<EXPENSES-NET> (513)<F1>
<NET-INVESTMENT-INCOME> (50)<F1>
<REALIZED-GAINS-CURRENT> 404
<APPREC-INCREASE-CURRENT> 15289
<NET-CHANGE-FROM-OPS> 15717
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0<F1>
<DISTRIBUTIONS-OF-GAINS> 0<F1>
<DISTRIBUTIONS-OTHER> 0<F1>
<NUMBER-OF-SHARES-SOLD> 1270<F1>
<NUMBER-OF-SHARES-REDEEMED> (893)<F1>
<SHARES-REINVESTED> 0<F1>
<NET-CHANGE-IN-ASSETS> 31144
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> (600)
<OVERDISTRIB-NII-PRIOR> (1)
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 186<F1>
<INTEREST-EXPENSE> 0<F1>
<GROSS-EXPENSE> 513<F1>
<AVERAGE-NET-ASSETS> 46964<F1>
<PER-SHARE-NAV-BEGIN> 9.96<F1>
<PER-SHARE-NII> (.01)<F1>
<PER-SHARE-GAIN-APPREC> 1.02<F1>
<PER-SHARE-DIVIDEND> 0<F1>
<PER-SHARE-DISTRIBUTIONS> 0<F1>
<RETURNS-OF-CAPITAL> 0<F1>
<PER-SHARE-NAV-END> 10.97<F1>
<EXPENSE-RATIO> 2.20<F1>
[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0
<FN>
<F1>CLASS D ONLY. ALL OTHER DATA ARE FUND LEVEL.
</FN>
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER> 021
<NAME> SELIGMAN SMALL-CAP VALUE FUND CLASS A
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-1999
<PERIOD-END> JUN-30-1999
<INVESTMENTS-AT-COST> 174891
<INVESTMENTS-AT-VALUE> 155280
<RECEIVABLES> 530
<ASSETS-OTHER> 175
<OTHER-ITEMS-ASSETS> 60
<TOTAL-ASSETS> 156045
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 821
<TOTAL-LIABILITIES> 821
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 171375
<SHARES-COMMON-STOCK> 6130<F1>
<SHARES-COMMON-PRIOR> 7672<F1>
<ACCUMULATED-NII-CURRENT> (1055)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 0
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (19611)
<NET-ASSETS> 55330<F1>
<DIVIDEND-INCOME> 237<F1>
<INTEREST-INCOME> 4<F1>
<OTHER-INCOME> 0<F1>
<EXPENSES-NET> (482)<F1>
<NET-INVESTMENT-INCOME> (241)<F1>
<REALIZED-GAINS-CURRENT> 4693
<APPREC-INCREASE-CURRENT> 13983
<NET-CHANGE-FROM-OPS> 17622
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0<F1>
<DISTRIBUTIONS-OF-GAINS> 0<F1>
<DISTRIBUTIONS-OTHER> 0<F1>
<NUMBER-OF-SHARES-SOLD> 2716<F1>
<NUMBER-OF-SHARES-REDEEMED> (4258)<F1>
<SHARES-REINVESTED> 0<F1>
<NET-CHANGE-IN-ASSETS> (22418)
<ACCUMULATED-NII-PRIOR> (1)
<ACCUMULATED-GAINS-PRIOR> (178)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 261<F1>
<INTEREST-EXPENSE> 0<F1>
<GROSS-EXPENSE> 482<F1>
<AVERAGE-NET-ASSETS> 52617<F1>
<PER-SHARE-NAV-BEGIN> 7.87<F1>
<PER-SHARE-NII> (.03)<F1>
<PER-SHARE-GAIN-APPREC> 1.19<F1>
<PER-SHARE-DIVIDEND> 0<F1>
<PER-SHARE-DISTRIBUTIONS> 0<F1>
<RETURNS-OF-CAPITAL> 0<F1>
<PER-SHARE-NAV-END> 9.03<F1>
<EXPENSE-RATIO> 1.85<F1>
[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0
<FN>
<F1>CLASS A ONLY. ALL OTHER DATA ARE FUND LEVEL.
</FN>
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER> 022
<NAME> SELIGMAN SMALL-CAP VALUE FUND CLASS B
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-1999
<PERIOD-END> JUN-30-1999
<INVESTMENTS-AT-COST> 174891
<INVESTMENTS-AT-VALUE> 155280
<RECEIVABLES> 530
<ASSETS-OTHER> 175
<OTHER-ITEMS-ASSETS> 60
<TOTAL-ASSETS> 156045
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 821
<TOTAL-LIABILITIES> 821
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 171375
<SHARES-COMMON-STOCK> 7230<F1>
<SHARES-COMMON-PRIOR> 9240<F1>
<ACCUMULATED-NII-CURRENT> (1055)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 0
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (19611)
<NET-ASSETS> 64281<F1>
<DIVIDEND-INCOME> 280<F1>
<INTEREST-INCOME> 4<F1>
<OTHER-INCOME> 0<F1>
<EXPENSES-NET> (797)<F1>
<NET-INVESTMENT-INCOME> (513)<F1>
<REALIZED-GAINS-CURRENT> 4693
<APPREC-INCREASE-CURRENT> 13983
<NET-CHANGE-FROM-OPS> 17622
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0<F1>
<DISTRIBUTIONS-OF-GAINS> 0<F1>
<DISTRIBUTIONS-OTHER> 0<F1>
<NUMBER-OF-SHARES-SOLD> 529<F1>
<NUMBER-OF-SHARES-REDEEMED> (2539)<F1>
<SHARES-REINVESTED> 0<F1>
<NET-CHANGE-IN-ASSETS> (22418)
<ACCUMULATED-NII-PRIOR> (1)
<ACCUMULATED-GAINS-PRIOR> (178)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 307<F1>
<INTEREST-EXPENSE> 0<F1>
<GROSS-EXPENSE> 797<F1>
<AVERAGE-NET-ASSETS> 61930<F1>
<PER-SHARE-NAV-BEGIN> 7.78<F1>
<PER-SHARE-NII> (.06)<F1>
<PER-SHARE-GAIN-APPREC> 1.17<F1>
<PER-SHARE-DIVIDEND> 0<F1>
<PER-SHARE-DISTRIBUTIONS> 0<F1>
<RETURNS-OF-CAPITAL> 0<F1>
<PER-SHARE-NAV-END> 8.89<F1>
<EXPENSE-RATIO> 2.60<F1>
[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0
<FN>
<F1>CLASS B ONLY. ALL OTHER DATA ARE FUND LEVEL.
</FN>
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER> 023
<NAME> SELIGMAN SMALL-CAP VALUE FUND CLASS C
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-1999
<PERIOD-END> JUN-30-1999
<INVESTMENTS-AT-COST> 174891
<INVESTMENTS-AT-VALUE> 155280
<RECEIVABLES> 530
<ASSETS-OTHER> 175
<OTHER-ITEMS-ASSETS> 60
<TOTAL-ASSETS> 156045
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 821
<TOTAL-LIABILITIES> 821
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 171375
<SHARES-COMMON-STOCK> 16<F1>
<SHARES-COMMON-PRIOR> 0<F1>
<ACCUMULATED-NII-CURRENT> (1055)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 0
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (19611)
<NET-ASSETS> 146<F1>
<DIVIDEND-INCOME> 0<F1>
<INTEREST-INCOME> 0<F1>
<OTHER-INCOME> 0<F1>
<EXPENSES-NET> 0<F1>
<NET-INVESTMENT-INCOME> 0<F1>
<REALIZED-GAINS-CURRENT> 4693
<APPREC-INCREASE-CURRENT> 13983
<NET-CHANGE-FROM-OPS> 17622
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0<F1>
<DISTRIBUTIONS-OF-GAINS> 0<F1>
<DISTRIBUTIONS-OTHER> 0<F1>
<NUMBER-OF-SHARES-SOLD> 16<F1>
<NUMBER-OF-SHARES-REDEEMED> 0<F1>
<SHARES-REINVESTED> 0<F1>
<NET-CHANGE-IN-ASSETS> (22418)
<ACCUMULATED-NII-PRIOR> (1)
<ACCUMULATED-GAINS-PRIOR> (178)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 0<F1>
<INTEREST-EXPENSE> 0<F1>
<GROSS-EXPENSE> 0<F1>
<AVERAGE-NET-ASSETS> 32<F1>
<PER-SHARE-NAV-BEGIN> 8.10<F1>
<PER-SHARE-NII> (.01)<F1>
<PER-SHARE-GAIN-APPREC> .80<F1>
<PER-SHARE-DIVIDEND> 0<F1>
<PER-SHARE-DISTRIBUTIONS> 0<F1>
<RETURNS-OF-CAPITAL> 0<F1>
<PER-SHARE-NAV-END> 8.89<F1>
<EXPENSE-RATIO> 2.89<F1>
[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0
<FN>
<F1>CLASS C ONLY. ALL OTHER DATA ARE FUND LEVEL.
</FN>
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER> 024
<NAME> SELIGMAN SMALL-CAP VALUE FUND CLASS D
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-1999
<PERIOD-END> JUN-30-1999
<INVESTMENTS-AT-COST> 174891
<INVESTMENTS-AT-VALUE> 155280
<RECEIVABLES> 530
<ASSETS-OTHER> 175
<OTHER-ITEMS-ASSETS> 60
<TOTAL-ASSETS> 156045
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 821
<TOTAL-LIABILITIES> 821
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 171375
<SHARES-COMMON-STOCK> 3989<F1>
<SHARES-COMMON-PRIOR> 5833<F1>
<ACCUMULATED-NII-CURRENT> (1055)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 0
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (19611)
<NET-ASSETS> 35467<F1>
<DIVIDEND-INCOME> 164<F1>
<INTEREST-INCOME> 2<F1>
<OTHER-INCOME> 0<F1>
<EXPENSES-NET> (466)<F1>
<NET-INVESTMENT-INCOME> (300)<F1>
<REALIZED-GAINS-CURRENT> 4693
<APPREC-INCREASE-CURRENT> 13983
<NET-CHANGE-FROM-OPS> 17622
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0<F1>
<DISTRIBUTIONS-OF-GAINS> 0<F1>
<DISTRIBUTIONS-OTHER> 0<F1>
<NUMBER-OF-SHARES-SOLD> 438<F1>
<NUMBER-OF-SHARES-REDEEMED> (2282)<F1>
<SHARES-REINVESTED> 0<F1>
<NET-CHANGE-IN-ASSETS> (22418)
<ACCUMULATED-NII-PRIOR> (1)
<ACCUMULATED-GAINS-PRIOR> (178)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 180<F1>
<INTEREST-EXPENSE> 0<F1>
<GROSS-EXPENSE> 466<F1>
<AVERAGE-NET-ASSETS> 36214<F1>
<PER-SHARE-NAV-BEGIN> 7.78<F1>
<PER-SHARE-NII> (.06)<F1>
<PER-SHARE-GAIN-APPREC> 1.17<F1>
<PER-SHARE-DIVIDEND> 0<F1>
<PER-SHARE-DISTRIBUTIONS> 0<F1>
<RETURNS-OF-CAPITAL> 0<F1>
<PER-SHARE-NAV-END> 8.89<F1>
<EXPENSE-RATIO> 2.60<F1>
[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0
<FN>
<F1>CLASS D ONLY. ALL OTHER DATA ARE FUND LEVEL.
</FN>
</TABLE>
