<PAGE> PAGE 1
000 A000000 04/30/96
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<PAGE> PAGE 2
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011 A00AA01 SELIGMAN FINANCIAL SERVICES, INC.
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<PAGE> PAGE 3
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<PAGE> PAGE 4
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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
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<PAGE> PAGE 14
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<PAGE> PAGE 15
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<PAGE> PAGE 16
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<PAGE> PAGE 17
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<PAGE> PAGE 18
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<PAGE> PAGE 19
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<PAGE> PAGE 20
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SIGNATURE THOMAS G. ROSE
TITLE TREASURER
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER>011
<NAME> SELIGMAN HENDERSON INTERNATIONAL FUND CLASS A
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> OCT-31-1996
<PERIOD-END> APR-30-1996
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<INVESTMENTS-AT-VALUE> 95366
<RECEIVABLES> 3121
<ASSETS-OTHER> 2095
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 100582
<PAYABLE-FOR-SECURITIES> 924
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 522
<TOTAL-LIABILITIES> 1446
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 85558
<SHARES-COMMON-STOCK> 2978<F1>
<SHARES-COMMON-PRIOR> 2918<F1>
<ACCUMULATED-NII-CURRENT> (220)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 1680
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 12118
<NET-ASSETS> 52948<F1>
<DIVIDEND-INCOME> 352<F1>
<INTEREST-INCOME> 51<F1>
<OTHER-INCOME> 28<F1>
<EXPENSES-NET> (470)<F1>
<NET-INVESTMENT-INCOME> (39)<F1>
<REALIZED-GAINS-CURRENT> 2845
<APPREC-INCREASE-CURRENT> 7572
<NET-CHANGE-FROM-OPS> 10206
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> (2690)<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 1044<F1>
<NUMBER-OF-SHARES-REDEEMED> (1091)<F1>
<SHARES-REINVESTED> 107<F1>
<NET-CHANGE-IN-ASSETS> 19100
<ACCUMULATED-NII-PRIOR> (9)
<ACCUMULATED-GAINS-PRIOR> 3398
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 262<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> (470)<F1>
<AVERAGE-NET-ASSETS> 52663<F1>
<PER-SHARE-NAV-BEGIN> 16.71<F1>
<PER-SHARE-NII> (.02)<F1>
<PER-SHARE-GAIN-APPREC> 2.01<F1>
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> (.92)<F1>
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 17.78<F1>
<EXPENSE-RATIO> 1.79<F1>
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
<FN>
<F1>Class A only. All other data are fund level.
</FN>
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER> 012
<NAME> SELIGMAN HENDERSON INTERNATIONAL FUND CLASS B
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> OCT-31-1996
<PERIOD-END> APR-30-1996
<INVESTMENTS-AT-COST> 83332
<INVESTMENTS-AT-VALUE> 95366
<RECEIVABLES> 3121
<ASSETS-OTHER> 2095
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 100582
<PAYABLE-FOR-SECURITIES> 924
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 522
<TOTAL-LIABILITIES> 1446
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 85558
<SHARES-COMMON-STOCK> 15<F1>
<SHARES-COMMON-PRIOR> 0<F1>
<ACCUMULATED-NII-CURRENT> (220)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 1680
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 12118
<NET-ASSETS> 267<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> 2845
<APPREC-INCREASE-CURRENT> 7572
<NET-CHANGE-FROM-OPS> 10206
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 0<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 15<F1>
<NUMBER-OF-SHARES-REDEEMED> 0<F1>
<SHARES-REINVESTED> 0<F1>
<NET-CHANGE-IN-ASSETS> 19100
<ACCUMULATED-NII-PRIOR> (9)
<ACCUMULATED-GAINS-PRIOR> 3398
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 0<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 0<F1>
<AVERAGE-NET-ASSETS> 176<F1>
<PER-SHARE-NAV-BEGIN> 17.38<F1>
<PER-SHARE-NII> 0<F1>
<PER-SHARE-GAIN-APPREC> .02<F1>
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 0<F1>
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 17.40<F1>
<EXPENSE-RATIO> 2.75<F1>
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
<FN>
<F1>Class B only. All other data are fund level.
</FN>
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER> 014
<NAME> SELIGMAN HENDERSON INTERNATIONAL FUND CLASS D
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> OCT-31-1996
<PERIOD-END> APR-30-1996
<INVESTMENTS-AT-COST> 83332
<INVESTMENTS-AT-VALUE> 95366
<RECEIVABLES> 3121
<ASSETS-OTHER> 2095
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 100582
<PAYABLE-FOR-SECURITIES> 924
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 522
<TOTAL-LIABILITIES> 1446
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 85558
<SHARES-COMMON-STOCK> 2640<F1>
<SHARES-COMMON-PRIOR> 1903<F1>
<ACCUMULATED-NII-CURRENT> (220)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 1680
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 12118
<NET-ASSETS> 45921<F1>
<DIVIDEND-INCOME> 273<F1>
<INTEREST-INCOME> 33<F1>
<OTHER-INCOME> 24<F1>
<EXPENSES-NET> (502)<F1>
<NET-INVESTMENT-INCOME> (172)<F1>
<REALIZED-GAINS-CURRENT> 2845
<APPREC-INCREASE-CURRENT> 7572
<NET-CHANGE-FROM-OPS> 10206
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> (1873)<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 895<F1>
<NUMBER-OF-SHARES-REDEEMED> (259)<F1>
<SHARES-REINVESTED> 101<F1>
<NET-CHANGE-IN-ASSETS> 19100
<ACCUMULATED-NII-PRIOR> (9)
<ACCUMULATED-GAINS-PRIOR> 3398
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 190<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> (502)<F1>
<AVERAGE-NET-ASSETS> 38151<F1>
<PER-SHARE-NAV-BEGIN> 16.43<F1>
<PER-SHARE-NII> (.09)<F1>
<PER-SHARE-GAIN-APPREC> 1.98<F1>
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> (.92)<F1>
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 17.40<F1>
<EXPENSE-RATIO> 2.64<F1>
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
<FN>
<F1>Class D only. All other data are fund level.
</FN>
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER> 021
<NAME> SELIGMAN HENDERSON GLOBAL SMALLER COS FUND CLASS A
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> OCT-31-1996
<PERIOD-END> APR-30-1996
<INVESTMENTS-AT-COST> 325758
<INVESTMENTS-AT-VALUE> 377382
<RECEIVABLES> 14833
<ASSETS-OTHER> 41691
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 433906
<PAYABLE-FOR-SECURITIES> 14962
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 1201
<TOTAL-LIABILITIES> 16163
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 349785
<SHARES-COMMON-STOCK> 15053<F1>
<SHARES-COMMON-PRIOR> 7372<F1>
<ACCUMULATED-NII-CURRENT> (1301)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 17475
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 51784
<NET-ASSETS> 228093<F1>
<DIVIDEND-INCOME> 635<F1>
<INTEREST-INCOME> 239<F1>
<OTHER-INCOME> (86)<F1>
<EXPENSES-NET> (1251)<F1>
<NET-INVESTMENT-INCOME> (463)<F1>
<REALIZED-GAINS-CURRENT> 18379
<APPREC-INCREASE-CURRENT> 31431
<NET-CHANGE-FROM-OPS> 48514
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> (7753)<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 8474<F1>
<NUMBER-OF-SHARES-REDEEMED> (1336)<F1>
<SHARES-REINVESTED> 543<F1>
<NET-CHANGE-IN-ASSETS> 229716
<ACCUMULATED-NII-PRIOR> (5)
<ACCUMULATED-GAINS-PRIOR> 13465
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 721<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> (1251)<F1>
<AVERAGE-NET-ASSETS> 144978<F1>
<PER-SHARE-NAV-BEGIN> 13.90<F1>
<PER-SHARE-NII> (.03)<F1>
<PER-SHARE-GAIN-APPREC> 2.24<F1>
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> (.96)<F1>
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 15.15<F1>
<EXPENSE-RATIO> 1.74<F1>
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
<FN>
<F1>Class A only. All other data are fund level.
</FN>
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER> 022
<NAME> SELIGMAN HENDERSON GLOBAL SMALLER COS FUND CLASS B
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> OCT-31-1996
<PERIOD-END> APR-30-1996
<INVESTMENTS-AT-COST> 325758
<INVESTMENTS-AT-VALUE> 377382
<RECEIVABLES> 14833
<ASSETS-OTHER> 41691
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 433906
<PAYABLE-FOR-SECURITIES> 14962
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 1201
<TOTAL-LIABILITIES> 16163
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 349785
<SHARES-COMMON-STOCK> 401<F1>
<SHARES-COMMON-PRIOR> 0<F1>
<ACCUMULATED-NII-CURRENT> (1301)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 17475
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 51784
<NET-ASSETS> 5924<F1>
<DIVIDEND-INCOME> 2<F1>
<INTEREST-INCOME> 0<F1>
<OTHER-INCOME> 0<F1>
<EXPENSES-NET> (2)<F1>
<NET-INVESTMENT-INCOME> 0<F1>
<REALIZED-GAINS-CURRENT> 18379
<APPREC-INCREASE-CURRENT> 31431
<NET-CHANGE-FROM-OPS> 48514
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 0<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 401<F1>
<NUMBER-OF-SHARES-REDEEMED> 0<F1>
<SHARES-REINVESTED> 0<F1>
<NET-CHANGE-IN-ASSETS> 229716
<ACCUMULATED-NII-PRIOR> (5)
<ACCUMULATED-GAINS-PRIOR> 13465
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 1<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> (2)<F1>
<AVERAGE-NET-ASSETS> 3151<F1>
<PER-SHARE-NAV-BEGIN> 14.44<F1>
<PER-SHARE-NII> 0<F1>
<PER-SHARE-GAIN-APPREC> .34<F1>
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 0<F1>
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 14.78<F1>
<EXPENSE-RATIO> 2.57<F1>
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
<FN>
<F1>Class B only. All other data are fund level.
</FN>
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER> 024
<NAME> SELIGMAN HENDERSON GLOBAL SMALLER COS FUND CLASS D
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> OCT-31-1996
<PERIOD-END> APR-30-1996
<INVESTMENTS-AT-COST> 325758
<INVESTMENTS-AT-VALUE> 377382
<RECEIVABLES> 14833
<ASSETS-OTHER> 41691
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 433906
<PAYABLE-FOR-SECURITIES> 14962
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 1201
<TOTAL-LIABILITIES> 16163
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 349785
<SHARES-COMMON-STOCK> 12429<F1>
<SHARES-COMMON-PRIOR> 6274<F1>
<ACCUMULATED-NII-CURRENT> (1301)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 17475
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 51784
<NET-ASSETS> 183726<F1>
<DIVIDEND-INCOME> 507<F1>
<INTEREST-INCOME> 195<F1>
<OTHER-INCOME> (72)<F1>
<EXPENSES-NET> (1463)<F1>
<NET-INVESTMENT-INCOME> (833)<F1>
<REALIZED-GAINS-CURRENT> 18379
<APPREC-INCREASE-CURRENT> 31431
<NET-CHANGE-FROM-OPS> 48514
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> (6616)<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 6348<F1>
<NUMBER-OF-SHARES-REDEEMED> (675)<F1>
<SHARES-REINVESTED> 482<F1>
<NET-CHANGE-IN-ASSETS> 229716
<ACCUMULATED-NII-PRIOR> (5)
<ACCUMULATED-GAINS-PRIOR> 13465
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 584<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> (1463)<F1>
<AVERAGE-NET-ASSETS> 117357<F1>
<PER-SHARE-NAV-BEGIN> 13.63<F1>
<PER-SHARE-NII> (.09)<F1>
<PER-SHARE-GAIN-APPREC> 2.20<F1>
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> (.96)<F1>
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 14.78<F1>
<EXPENSE-RATIO> 2.51<F1>
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
<FN>
<F1>Class D only. All other data are fund level.
</FN>
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER> 041
<NAME> SELIGMAN HENDERSON GLOBAL GROWTH OPPORTUNITIES FUND CLASS A
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> OCT-31-1996
<PERIOD-END> APR-30-1996
<INVESTMENTS-AT-COST> 125341
<INVESTMENTS-AT-VALUE> 140360
<RECEIVABLES> 2365
<ASSETS-OTHER> 9233
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 151958
<PAYABLE-FOR-SECURITIES> 2740
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 603
<TOTAL-LIABILITIES> 3343
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 133640
<SHARES-COMMON-STOCK> 12814<F1>
<SHARES-COMMON-PRIOR> 0<F1>
<ACCUMULATED-NII-CURRENT> (474)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 491
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 14958
<NET-ASSETS> 104531<F1>
<DIVIDEND-INCOME> 360<F1>
<INTEREST-INCOME> 103<F1>
<OTHER-INCOME> (18)<F1>
<EXPENSES-NET> (761)<F1>
<NET-INVESTMENT-INCOME> (289)<F1>
<REALIZED-GAINS-CURRENT> 491
<APPREC-INCREASE-CURRENT> 14958
<NET-CHANGE-FROM-OPS> 14975
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 0<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 13841<F1>
<NUMBER-OF-SHARES-REDEEMED> (1027)<F1>
<SHARES-REINVESTED> 0<F1>
<NET-CHANGE-IN-ASSETS> 148615
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 367<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> (761)<F1>
<AVERAGE-NET-ASSETS> 73818<F1>
<PER-SHARE-NAV-BEGIN> 7.14<F1>
<PER-SHARE-NII> (.02)<F1>
<PER-SHARE-GAIN-APPREC> 1.04<F1>
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 0<F1>
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 8.16<F1>
<EXPENSE-RATIO> 2.00<F1>
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
<FN>
<F1>Class A only. All other data are fund level.
</FN>
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER> 042
<NAME> SELIGMAN HENDERSON GLOBAL GROWTH OPPORTUNITIES FUND CLASS B
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> OCT-31-1996
<PERIOD-END> APR-30-1996
<INVESTMENTS-AT-COST> 125341
<INVESTMENTS-AT-VALUE> 140360
<RECEIVABLES> 2365
<ASSETS-OTHER> 9233
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 151958
<PAYABLE-FOR-SECURITIES> 2740
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 603
<TOTAL-LIABILITIES> 3343
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 133640
<SHARES-COMMON-STOCK> 152<F1>
<SHARES-COMMON-PRIOR> 0<F1>
<ACCUMULATED-NII-CURRENT> (474)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 491
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 14958
<NET-ASSETS> 1233<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> 491
<APPREC-INCREASE-CURRENT> 14958
<NET-CHANGE-FROM-OPS> 14975
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 0<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 152<F1>
<NUMBER-OF-SHARES-REDEEMED> 0<F1>
<SHARES-REINVESTED> 0<F1>
<NET-CHANGE-IN-ASSETS> 148615
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 0
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 0
<AVERAGE-NET-ASSETS> 789<F1>
<PER-SHARE-NAV-BEGIN> 8.04<F1>
<PER-SHARE-NII> 0
<PER-SHARE-GAIN-APPREC> .09<F1>
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 0<F1>
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 8.13<F1>
<EXPENSE-RATIO> 2.75<F1>
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
<FN>
<F1>Class B only. All other data are fund level.
</FN>
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER> 044
<NAME> SELIGMAN HENDERSON GLOBAL GROWTH OPPORTUNITIES FUND CLASS D
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> OCT-31-1996
<PERIOD-END> APR-30-1996
<INVESTMENTS-AT-COST> 125341
<INVESTMENTS-AT-VALUE> 140360
<RECEIVABLES> 2365
<ASSETS-OTHER> 9233
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 151958
<PAYABLE-FOR-SECURITIES> 2740
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 603
<TOTAL-LIABILITIES> 3343
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 133640
<SHARES-COMMON-STOCK> 5273<F1>
<SHARES-COMMON-PRIOR> 0<F1>
<ACCUMULATED-NII-CURRENT> (474)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 491
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 14958
<NET-ASSETS> 42851<F1>
<DIVIDEND-INCOME> 136<F1>
<INTEREST-INCOME> 34<F1>
<OTHER-INCOME> (7)<F1>
<EXPENSES-NET> (357)<F1>
<NET-INVESTMENT-INCOME> (185)<F1>
<REALIZED-GAINS-CURRENT> 491
<APPREC-INCREASE-CURRENT> 14958
<NET-CHANGE-FROM-OPS> 14975
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 0<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 5499<F1>
<NUMBER-OF-SHARES-REDEEMED> (226)<F1>
<SHARES-REINVESTED> 0<F1>
<NET-CHANGE-IN-ASSETS> 148615
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 127<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> (357)<F1>
<AVERAGE-NET-ASSETS> 25448<F1>
<PER-SHARE-NAV-BEGIN> 7.14<F1>
<PER-SHARE-NII> (.05)<F1>
<PER-SHARE-GAIN-APPREC> 1.04<F1>
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 0<F1>
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 8.13<F1>
<EXPENSE-RATIO> 2.75<F1>
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
<FN>
<F1>Class D only. All other data are fund level.
</FN>
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER> 031
<NAME> SELIGMAN HENDERSON GLOBAL TECHNOLOGY FUND CLASS A
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> OCT-31-1996
<PERIOD-END> APR-30-1996
<INVESTMENTS-AT-COST> 648423
<INVESTMENTS-AT-VALUE> 696728
<RECEIVABLES> 13729
<ASSETS-OTHER> 97393
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 807850
<PAYABLE-FOR-SECURITIES> 18287
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 3450
<TOTAL-LIABILITIES> 21737
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 733068
<SHARES-COMMON-STOCK> 46369<F1>
<SHARES-COMMON-PRIOR> 34318<F1>
<ACCUMULATED-NII-CURRENT> (3345)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 8895
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 47495
<NET-ASSETS> 565200<F1>
<DIVIDEND-INCOME> 541<F1>
<INTEREST-INCOME> 1589<F1>
<OTHER-INCOME> 324<F1>
<EXPENSES-NET> (4351)<F1>
<NET-INVESTMENT-INCOME> (1897)<F1>
<REALIZED-GAINS-CURRENT> 11738
<APPREC-INCREASE-CURRENT> 211
<NET-CHANGE-FROM-OPS> 8667
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (734)<F1>
<DISTRIBUTIONS-OF-GAINS> (29793)<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 15248<F1>
<NUMBER-OF-SHARES-REDEEMED> (5664)<F1>
<SHARES-REINVESTED> 2467<F1>
<NET-CHANGE-IN-ASSETS> 176759
<ACCUMULATED-NII-PRIOR> 671
<ACCUMULATED-GAINS-PRIOR> 37811
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 2437<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 4351<F1>
<AVERAGE-NET-ASSETS> 489734<F1>
<PER-SHARE-NAV-BEGIN> 13.05<F1>
<PER-SHARE-NII> (.05)<F1>
<PER-SHARE-GAIN-APPREC> (.02)<F1>
<PER-SHARE-DIVIDEND> (.02)<F1>
<PER-SHARE-DISTRIBUTIONS> (.77)<F1>
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 12.19<F1>
<EXPENSE-RATIO> 1.79<F1>
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
<FN>
<F1>Class A only. All other data are fund level.
</FN>
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER> 032
<NAME> SELIGMAN HENDERSON GLOBAL TECHNOLOGY FUND CLASS B
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> OCT-31-1996
<PERIOD-END> APR-30-1996
<INVESTMENTS-AT-COST> 648423
<INVESTMENTS-AT-VALUE> 696728
<RECEIVABLES> 13729
<ASSETS-OTHER> 97393
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 807850
<PAYABLE-FOR-SECURITIES> 18287
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 3450
<TOTAL-LIABILITIES> 21737
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 733068
<SHARES-COMMON-STOCK> 122<F1>
<SHARES-COMMON-PRIOR> 0<F1>
<ACCUMULATED-NII-CURRENT> (3345)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 8895
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 47495
<NET-ASSETS> 1469<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> 11738
<APPREC-INCREASE-CURRENT> 211
<NET-CHANGE-FROM-OPS> 8667
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0<F1>
<DISTRIBUTIONS-OF-GAINS> 0<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 122<F1>
<NUMBER-OF-SHARES-REDEEMED> 0<F1>
<SHARES-REINVESTED> 0<F1>
<NET-CHANGE-IN-ASSETS> 176759
<ACCUMULATED-NII-PRIOR> 671
<ACCUMULATED-GAINS-PRIOR> 37811
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 0<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 0<F1>
<AVERAGE-NET-ASSETS> 706<F1>
<PER-SHARE-NAV-BEGIN> 11.47<F1>
<PER-SHARE-NII> 0<F1>
<PER-SHARE-GAIN-APPREC> .53<F1>
<PER-SHARE-DIVIDEND> 0<F1>
<PER-SHARE-DISTRIBUTIONS> 0<F1>
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 12.00<F1>
<EXPENSE-RATIO> 2.67<F1>
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
<FN>
<F1>Class B only. All other data are fund level.
</FN>
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER>034
<NAME> SELIGMAN HENDERSON GLOBAL TECHNOLOGY FUND CLASS D
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> OCT-31-1996
<PERIOD-END> APR-30-1996
<INVESTMENTS-AT-COST> 648423
<INVESTMENTS-AT-VALUE> 696728
<RECEIVABLES> 13729
<ASSETS-OTHER> 97393
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 807850
<PAYABLE-FOR-SECURITIES> 18287
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 3450
<TOTAL-LIABILITIES> 21737
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 733068
<SHARES-COMMON-STOCK> 18284<F1>
<SHARES-COMMON-PRIOR> 12543<F1>
<ACCUMULATED-NII-CURRENT> (3345)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 8895
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 47495
<NET-ASSETS> 219444<F1>
<DIVIDEND-INCOME> 206<F1>
<INTEREST-INCOME> 595<F1>
<OTHER-INCOME> 126<F1>
<EXPENSES-NET> (2312)<F1>
<NET-INVESTMENT-INCOME> (1385)<F1>
<REALIZED-GAINS-CURRENT> 11738
<APPREC-INCREASE-CURRENT> 211
<NET-CHANGE-FROM-OPS> 8667
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0<F1>
<DISTRIBUTIONS-OF-GAINS> (10861)<F1>
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 7282<F1>
<NUMBER-OF-SHARES-REDEEMED> (2460)<F1>
<SHARES-REINVESTED> 919<F1>
<NET-CHANGE-IN-ASSETS> 176759
<ACCUMULATED-NII-PRIOR> 671
<ACCUMULATED-GAINS-PRIOR> 37811
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 911<F1>
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> (2312)<F1>
<AVERAGE-NET-ASSETS> 183116<F1>
<PER-SHARE-NAV-BEGIN> 12.89<F1>
<PER-SHARE-NII> (.09)<F1>
<PER-SHARE-GAIN-APPREC> (.03)<F1>
<PER-SHARE-DIVIDEND> 0<F1>
<PER-SHARE-DISTRIBUTIONS> (.77)<F1>
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 12.00<F1>
<EXPENSE-RATIO> 2.54<F1>
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
<FN>
<F1>Class D only. All other data are fund level.
</FN>
</TABLE>
