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Previous: NUVEEN TAX EXEMPT MONEY MARKET FUND INC, NSAR-A, EX-27, 2000-10-25 |
Next: JACKPOT ENTERPRISES INC, 8-K, 2000-10-25 |
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 13F
FORM 13F COVER PAGE
Report for the Calendar Year or Quarter Ended: Septmeber 30, 2000
Check here if Amendment [ ] Amendment Number:
This Amendment (Check only one.) [ ] is restatement.
[ ] adds new holdings entries.
Institutional Investment Manager Filing this Report:
Name: J. & W. Seligman & Co. Incorporated
Address: 100 Park Avenue
New York, NY 10017
13F File Number:28-861
The institutional investment manager filing this report and the
person by whom it is signed hereby represent that the person
signing the report is authorized to submit it, that all
information contained herein is true, correct and complete, and
that it is understood that all required items, statements,
schedules, lists, and tables, are considered integral parts of
this form.
Person Signing this Report on Behalf of reporting Manager:
Name: Brian T. Zino
Title: President
Phone: 212-850-1864
Signature, Placce, and Date of Signing:
Brian T. Zino New York, New York October 25, 2000
Report Type (Check only one.):
[X] 13F HOLDINGS REPORT.
[ ] 13F NOTICE.
[ ] 13F COMBINATION REPORT.
List of Other Managers Reporting for this Manager:
I AM SIGNING THIS REPORT AS REQUIRED BY THE SECUTIRIES EXCHANGE
ACT OF 1934.
J. & W. Seligman & Co. Incorporated
(Name of Institutional Investment Manager)
/s/ Brian T. Zino
------------------------------------
(Manual Signature of Person Duly Authorized to submit This Report)
<PAGE>
FORM 13F SUMMARY PAGE
Report Summary:
Number of Other Included Managers: 0
Form 13F Information Table Entry Total: 679
Form 13F Information Table Value Total: $27,254,092,855
List of Other Included Managers:
<PAGE>
<TABLE>
<CAPTION>
<S> <C> <C> <C> <C> <C> <C> <C> <C> <C>
9/30/2000 FORM 13F J. & W. SELIGMAN & CO. INCORPORATED Page 1
ITEM 1: ITEM 2: ITEM 3: ITEM 4: ITEM 5: ITEM 6: ITEM 7: ITEM 8:
SHARES OR INVST DISCRET V O T I N G A U T H O R I T Y
TITLE CUSIP FAIR MARKET PRINCIPAL SOLE OTHR (S H A R E S)
NAME OF ISSUER OF CLASS NUMBER VALUE AMOUNT SHRD MGRS (A)SOLE (B)SHARED (C)NONE
ABC-NACO INC COMMON 000752105 3,765,169 717,175 X 717,175
271,425 51,700 X 51,700
ACT MFG INC COMMON 000973107 33,557,176 636,155 X 636,155
AFLAC INC COMMON 001055102 25,852,422 403,550 X 403,550
24,344 380 X 380
AES CORP COMMON 00130H105 45,181,230 659,580 X 659,580
817,548 11,935 X 11,935
1,500,150 21,900 X 21,900
AT&T CORP COMMON 001957109 47,994,344 1,633,850 X 1,633,850
AT&T CORP - LIBERTY MEDIA COMMON 001957208 57,600 3,200 X 3,200
ATMI INC COMMON 00207R101 33,241,588 1,422,100 X 1,422,100
ASAT HOLDINGS LTD - ADR COMMON 00208B105 11,709,305 1,784,275 X 1,784,275
AXA FINANCIAL INC COMMON 002451102 141,698,803 2,781,817 X 2,781,817
28,513,030 559,765 X 559,765
ABBOTT LABS COMMON 002824100 63,689,755 1,339,075 X 1,339,075
ABERCROMBIE & FITCH CO COMMON 002896207 9,714,727 509,625 X 509,625
447,397 23,470 X 23,470
ABGENIX INC COMMON 00339B107 363,656 4,500 X 4,500
1,017,833 12,595 X 12,595
3,191,690 39,495 X 39,495
ABOUT.COM INC COMMON 003736105 8,747,725 270,200 X 270,200
1,876,714 57,968 X 57,968
ABRAXAS PETROLEUM CORP COMMON 003830106 3,702,105 955,382 X 955,382
19,637 5,068 X 5,068
ACTUATE SOFTWARE CORP COMMON 00508B102 52,473,248 1,518,900 X 1,518,900
14,285,375 413,507 X 413,507
ADAPTEC INC COMMON 00651F108 184,499,600 9,224,980 X 9,224,980
ADELPHIA COMMUNICATIONS CORP COMMON 006848105 57,334,961 2,080,180 X 2,080,180
ADVANCED FIBRE COMMUNICATIONS COMMON 00754A105 412,838 10,900 X 10,900
28,760,192 759,345 X 759,345
3,836,738 101,300 X 101,300
ADVANCED POWER TECHNOLOGY INCORPOCOMMON 00761E108 9,626,125 290,600 X 290,600
Total 818,184,447
<PAGE>
9/30/2000 FORM 13F J. & W. SELIGMAN & CO. INCORPORATED Page 2
ITEM 1: ITEM 2: ITEM 3: ITEM 4: ITEM 5: ITEM 6: ITEM 7: ITEM 8:
SHARES OR INVST DISCRET V O T I N G A U T H O R I T Y
TITLE CUSIP FAIR MARKET PRINCIPAL SOLE OTHR (S H A R E S)
NAME OF ISSUER OF CLASS NUMBER VALUE AMOUNT SHRD MGRS (A)SOLE (B)SHARED (C)NONE
2,705,650 81,680 X 81,680
ADVANCED MICRO DEVICES INC COMMON 007903107 165,008,576 6,984,490 X 6,984,490
ADVENT SOFTWARE INC COMMON 007974108 70,034,315 1,002,280 X 1,002,280
21,234,733 303,896 X 303,896
AFFILIATED MANAGERS GROUP COMMON 008252108 32,921,263 578,200 X 578,200
10,625,164 186,611 X 186,611
AGILENT TECHNOLOGIES INC COMMON 00846U101 42,920,292 877,043 X 877,043
AIRGATE PCS INC COMMON 009367103 35,325,600 787,200 X 787,200
10,696,136 238,354 X 238,354
ALAMOSA PCS HOLDINGS INC COMMON 011593100 12,206,994 754,100 X 754,100
3,773,630 233,120 X 233,120
ALCATEL SA COMMON 013904305 6,054,234 96,290 X 96,290
493,883 7,855 X 7,855
ALKERMES INC COMMON 01642T108 448,050 11,600 X 11,600
1,240,828 32,125 X 32,125
4,031,678 104,380 X 104,380
ALLIED CAPITAL CORP COMMON 01903Q108 17,477,725 842,300 X 842,300
12,346 595 X 595
ALLIED ZURICH PLC COMMON 01959Q101 108,453 4,791 X 4,791
508,896 22,481 X 22,481
ALLSTATE CORP COMMON 020002101 118,013,606 3,396,075 X 3,396,075
22,191,698 638,610 X 638,610
ALLTEL CORP COMMON 020039103 31,313 600 X 600
ALPHARMA INC COMMON 020813101 30,519,713 499,300 X 499,300
9,744,486 159,419 X 159,419
ALTERA CORP COMMON 021441100 158,017,404 3,309,265 X 3,309,265
ALZA CORP DEL COMMON 022615108 423,850 4,900 X 4,900
1,046,650 12,100 X 12,100
3,982,893 46,045 X 46,045
AMERICA ONLINE INC DEL COMMON 02364J104 57,210,156 1,064,375 X 1,064,375
UNITED CUSTOMER MNGNT SOLUTIONS COMMON 0246718 586,000 5,860 X 5,860
AMERICAN CAPITAL STRATEGIES COMMON 024937104 18,713,125 790,000 X 790,000
Total 858,309,337
<PAGE>
9/30/2000 FORM 13F J. & W. SELIGMAN & CO. INCORPORATED Page 3
ITEM 1: ITEM 2: ITEM 3: ITEM 4: ITEM 5: ITEM 6: ITEM 7: ITEM 8:
SHARES OR INVST DISCRET V O T I N G A U T H O R I T Y
TITLE CUSIP FAIR MARKET PRINCIPAL SOLE OTHR (S H A R E S)
NAME OF ISSUER OF CLASS NUMBER VALUE AMOUNT SHRD MGRS (A)SOLE (B)SHARED (C)NONE
4,896,798 206,725 X 206,725
AMERICAN GENERAL CORP COMMON 026351106 96,195,450 1,233,275 X 1,233,275
AMERICAN HOME PRODS CORP COMMON 026609107 134,995,230 2,386,656 X 2,386,656
10,671,364 188,665 X 188,665
AMERICAN INTL GROUP INC COMMON 026874107 182,357,470 1,905,761 X 1,905,761
1,808,135 18,896 X 18,896
2,329,991 24,350 X 24,350
AMERICAN PWR CONVERSION CORP COMMON 029066107 173,783,106 9,057,100 X 9,057,100
AMERICAN TOWER CORP -CL A COMMON 029912201 648,225 17,200 X 17,200
1,621,316 43,020 X 43,020
5,850,796 155,245 X 155,245
AMERICREDIT CORP COMMON 03060R101 14,334,219 497,500 X 497,500
4,265,258 148,035 X 148,035
AMERISOURCE HEALTH CORP COMMON 03071P102 17,117,400 364,200 X 364,200
4,556,603 96,949 X 96,949
AMGEN INC COMMON 031162100 26,622,671 381,260 X 381,260
722,372 10,345 X 10,345
1,710,789 24,500 X 24,500
AMKOR TECHNOLOGIES INC COMMON 031652100 308,320,196 11,801,730 X 11,801,730
AMKOR TECH IND CONVERT 031652AF7 10,092,250 12,775,000 X 12,775,000
79,000 100,000 X 100,000
AMPHENOL CORP NEW COMMON 032095101 58,946,540 1,035,285 X 1,035,285
ANADARKO PETE CORP COMMON 032511107 38,082 573 X 573
ANADIGICS INC COMMON 032515108 203,550 9,200 X 9,200
492,392 22,255 X 22,255
1,899,011 85,831 X 85,831
ANALOG DEVICES INC COMMON 032654105 146,547,612 1,774,990 X 1,774,990
ANCHOR GAMING COMMON 033037102 6,150,181 77,300 X 77,300
1,105,919 13,900 X 13,900
ANDREW CORP COMMON 034425108 39,935,545 1,524,985 X 1,524,985
3,485,766 133,108 X 133,108
ANDRX CORP. ANDRX GROUP COMMON 034553107 21,177,450 226,800 X 226,800
Total 1,282,960,686
<PAGE>
9/30/2000 FORM 13F J. & W. SELIGMAN & CO. INCORPORATED Page 4
ITEM 1: ITEM 2: ITEM 3: ITEM 4: ITEM 5: ITEM 6: ITEM 7: ITEM 8:
SHARES OR INVST DISCRET V O T I N G A U T H O R I T Y
TITLE CUSIP FAIR MARKET PRINCIPAL SOLE OTHR (S H A R E S)
NAME OF ISSUER OF CLASS NUMBER VALUE AMOUNT SHRD MGRS (A)SOLE (B)SHARED (C)NONE
10,738 115 X 115
ANHEUSER BUSCH COS INC COMMON 035229103 16,925,000 400,000 X 400,000
ANICOM INC COMMON 035250109 384 100 X 100
ANTEC CORP COMMON 03664P105 22,632,400 767,200 X 767,200
6,816,359 231,063 X 231,063
AO TATNEFT COMMON 03737P306 397,500 40,000 X 40,000
APOLLO GROUP INC COMMON 037604105 458,563 11,500 X 11,500
5,385,318 135,055 X 135,055
4,298,525 107,800 X 107,800
APPLE COMPUTER INC COMMON 037833100 20,729 805 X 805
APRIA HEALTHCARE GROUP INC COMMON 037933108 7,173,004 514,655 X 514,655
595,689 42,740 X 42,740
APPLICA INC COMMON 03815A106 3,291,267 531,922 X 531,922
209,354 33,835 X 33,835
APPLIED EXTRUSION TECHNOLOGIES COMMON 038196101 2,245,211 704,380 X 704,380
70,667 22,170 X 22,170
APPLIED MATLS INC COMMON 038222105 175,728,109 2,962,750 X 2,962,750
APPLIED MICRO CIRCUITS CORP COMMON 03822W109 53,053,554 256,220 X 256,220
668,812 3,230 X 3,230
1,242,375 6,000 X 6,000
APPLIED MOLECULAR EVOLUTION COMMON 03823E108 36,113 900 X 900
ARIBA INC COMMON 04033V104 20,873,802 145,700 X 145,700
16,476 115 X 115
ARMSTRONG HOLDINGS INC COMMON 042384107 3,581 300 X 300
7,938 665 X 665
ARROW ELECTRS INC COMMON 042735100 103,181,444 3,029,180 X 3,029,180
ART TECHNOLOGY GROUP INC COMMON 04289L107 17,268,188 182,250 X 182,250
14,686 155 X 155
ARTESYN TECHNOLOGIES INC COMMON 043127109 15,380,913 528,100 X 528,100
ASAHI CHEM INDUS - UNSPON ADR COMMON 043389204 132,506 2,220 X 2,220
596,875 10,000 X 10,000
Total 458,736,078
<PAGE>
9/30/2000 FORM 13F J. & W. SELIGMAN & CO. INCORPORATED Page 5
ITEM 1: ITEM 2: ITEM 3: ITEM 4: ITEM 5: ITEM 6: ITEM 7: ITEM 8:
SHARES OR INVST DISCRET V O T I N G A U T H O R I T Y
TITLE CUSIP FAIR MARKET PRINCIPAL SOLE OTHR (S H A R E S)
NAME OF ISSUER OF CLASS NUMBER VALUE AMOUNT SHRD MGRS (A)SOLE (B)SHARED (C)NONE
ASPECT COMMUNICATIONS CORP. COMMON 04523Q102 305,250 14,800 X 14,800
918,947 44,555 X 44,555
2,884,303 139,845 X 139,845
ASPEN TECHNOLOGY INC COMMON 045327103 24,313,350 538,800 X 538,800
6,771,683 150,065 X 150,065
ATMEL CORP COMMON 049513104 75,896,038 4,997,270 X 4,997,270
AUTODESK INC COMMON 052769106 165,832,730 6,535,280 X 6,535,280
AUTONOMY CORPORATION PLC - ADR COMMON 05329Q105 27,104,000 492,800 X 492,800
AVANT CORP COMMON 053487104 348,575 19,100 X 19,100
996,724 54,615 X 54,615
3,271,678 179,270 X 179,270
AVANEX CORPORATION COMMON 05348W109 13,891,688 129,000 X 129,000
8,077 75 X 75
AVANTGO INCORPORATED COMMON 05349M100 24,000 1,200 X 1,200
2,522,000 126,100 X 126,100
224,000 11,200 X 11,200
AVIS GROUP HOLDINGS INC. COMMON 053790101 9,845,869 332,350 X 332,350
658,860 22,240 X 22,240
AVNET INC COMMON 053807103 70,898,910 2,498,640 X 2,498,640
AVOCENT CORPORATION COMMON 053893103 144,708,141 2,625,091 X 2,625,091
AXA-UAP COMMON 054536107 132,933 2,055 X 2,055
674,820 10,432 X 10,432
BISYS GROUP INC COMMON 055472104 12,857,069 166,300 X 166,300
12,370 160 X 160
BJS WHOLESALE CLUB INC COMMON 05548J106 259,350 7,600 X 7,600
753,821 22,090 X 22,090
2,422,875 71,000 X 71,000
BP AMOCO PLC - SPONS ADR COMMON 055622104 69,890,358 1,318,686 X 1,318,686
417,110 7,870 X 7,870
BWAY CORP COMMON 056039100 4,359,462 882,929 X 882,929
251,418 50,920 X 50,920
BAKER HUGHES INC COMMON 057224107 24,086,700 648,800 X 648,800
Total 667,543,107
<PAGE>
9/30/2000 FORM 13F J. & W. SELIGMAN & CO. INCORPORATED Page 6
ITEM 1: ITEM 2: ITEM 3: ITEM 4: ITEM 5: ITEM 6: ITEM 7: ITEM 8:
SHARES OR INVST DISCRET V O T I N G A U T H O R I T Y
TITLE CUSIP FAIR MARKET PRINCIPAL SOLE OTHR (S H A R E S)
NAME OF ISSUER OF CLASS NUMBER VALUE AMOUNT SHRD MGRS (A)SOLE (B)SHARED (C)NONE
BANCO BILBAO VIZCAYA - SPON ADR COMMON 05946K101 137,055 9,137 X 9,137
662,925 44,195 X 44,195
BANK OF AMERICA CORP COMMON 060505104 106,975,466 2,042,491 X 2,042,491
179,489 3,427 X 3,427
BANK OF NEW YORK CO INC. COMMON 064057102 293,440,656 5,234,170 X 5,234,170
29,938,777 534,025 X 534,025
BANK TOKYO-MITSUBISHI LTD COMMON 065379109 90,461 7,740 X 7,740
438,667 37,533 X 37,533
BARCLAYS PLC -SPONS ADR COMMON 06738E204 118,855 1,075 X 1,075
591,509 5,350 X 5,350
BARR LABS INC COMMON 068306109 42,426,738 639,800 X 639,800
13,223,840 199,417 X 199,417
BARRETT RES CORP COMMON 068480201 378,125 10,000 X 10,000
1,093,348 28,915 X 28,915
3,529,797 93,350 X 93,350
BAXTER INTL INC COMMON 071813109 178,731,075 2,239,387 X 2,239,387
22,520,294 282,165 X 282,165
BAY VIEW CAP CORP DEL COMMON 07262L101 5,983,504 556,605 X 556,605
295,195 27,460 X 27,460
BAYER A G COMMON 072730302 65,257 1,765 X 1,765
345,879 9,355 X 9,355
BAYERISCHE HYPO-UND VER-ADR COMMON 072735103 76,322 1,395 X 1,395
388,448 7,100 X 7,100
BEA SYS INC COMMON 073325102 55,042,050 706,800 X 706,800
411,959 5,290 X 5,290
1,779,444 22,850 X 22,850
BERKLEY W R CORP COMMON 084423102 8,697,861 251,656 X 251,656
502,366 14,535 X 14,535
BESTFOODS COMMON 08658U101 43,650 600 X 600
BINDLEY WESTN INDS INC COMMON 090324104 19,574,400 611,700 X 611,700
5,537,600 173,050 X 173,050
BINDVIEW DEVELOPMENT CORP COMMON 090327107 189,063 25,000 X 25,000
7,274,407 961,905 X 961,905
Total 800,684,479
<PAGE>
9/30/2000 FORM 13F J. & W. SELIGMAN & CO. INCORPORATED Page 7
ITEM 1: ITEM 2: ITEM 3: ITEM 4: ITEM 5: ITEM 6: ITEM 7: ITEM 8:
SHARES OR INVST DISCRET V O T I N G A U T H O R I T Y
TITLE CUSIP FAIR MARKET PRINCIPAL SOLE OTHR (S H A R E S)
NAME OF ISSUER OF CLASS NUMBER VALUE AMOUNT SHRD MGRS (A)SOLE (B)SHARED (C)NONE
1,760,512 232,795 X 232,795
BIOGEN INC COMMON 090597105 2,562,000 42,000 X 42,000
BIOMET INC COMMON 090613100 376,250 10,750 X 10,750
1,198,295 34,237 X 34,237
3,499,720 99,992 X 99,992
BOEING CO COMMON 097023105 18,900 300 X 300
BRASIL TELECOM PARTICIPACOES S A COMMON 105530109 932,000 16,000 X 16,000
BRINKER INTL INC COMMON 109641100 20,710,938 687,500 X 687,500
5,973,788 198,300 X 198,300
BRISTOL MYERS SQUIBB CO COMMON 110122108 43,464,984 760,875 X 760,875
120,248 2,105 X 2,105
BRITISH AWYS PLC COMMON 110419306 4,275 100 X 100
BRITISH AMERICAN TOBACCO COMMON 110448107 X
BROADBASE SOFTWARE, INC. COMMON 11130R100 7,178,631 529,300 X 529,300
1,517,373 111,880 X 111,880
BROADCOM CORP-CL A COMMON 111320107 32,253,000 132,320 X 132,320
832,406 3,415 X 3,415
1,791,563 7,350 X 7,350
BROADWING INC COMMON 111620100 15,710,713 614,600 X 614,600
13,548 530 X 530
BROCADE COMMUNICATIONS SYS COMMON 111621108 76,141,860 322,635 X 322,635
1,222,480 5,180 X 5,180
2,289,200 9,700 X 9,700
BROKEN HILL PROPRIETARY COMPANY LCOMMON 112169602 103,833 5,065 X 5,065
526,133 25,665 X 25,665
BROTHERS GOURMET COFFEES INC COMMON 114822109 4 1,086 X 1,086
BUSINESS OBJECTS SA-SP ADR COMMON 12328X107 23,969,250 212,000 X 212,000
CFW COMMUNICATION CO COMMON 124923103 170,100 6,300 X 6,300
458,325 16,975 X 16,975
1,582,605 58,615 X 58,615
C-CUBE MICROSYSTEMS INC-NEW COMMON 12501N108 51,498,050 2,512,100 X 2,512,100
CSG SYS INTL INC COMMON 126349109 93,843,275 3,235,975 X 3,235,975
Total 391,724,257
<PAGE>
9/30/2000 FORM 13F J. & W. SELIGMAN & CO. INCORPORATED Page 8
ITEM 1: ITEM 2: ITEM 3: ITEM 4: ITEM 5: ITEM 6: ITEM 7: ITEM 8:
SHARES OR INVST DISCRET V O T I N G A U T H O R I T Y
TITLE CUSIP FAIR MARKET PRINCIPAL SOLE OTHR (S H A R E S)
NAME OF ISSUER OF CLASS NUMBER VALUE AMOUNT SHRD MGRS (A)SOLE (B)SHARED (C)NONE
7,830 270 X 270
CTS CORP COMMON 126501105 120,596,850 2,382,160 X 2,382,160
CABLEVISION SYS CORP COMMON 12686C109 23,873 360 X 360
CABLETRON SYS INC COMMON 126920107 282,000 9,600 X 9,600
730,116 24,855 X 24,855
2,624,509 89,345 X 89,345
CADBURY SCHWEPPES PLC - SP ADR COMMON 127209302 92,039 3,825 X 3,825
504,470 20,965 X 20,965
CADMUS COMMUNICATIONS CORP COMMON 127587103 6,360,859 782,875 X 782,875
297,375 36,600 X 36,600
CAL DIVE INTL INC COMMON 127914109 10,248,000 179,200 X 179,200
3,013,781 52,700 X 52,700
CALIFORNIA PIZZA KITCHEN INC COMMON 13054D109 190,400 6,800 X 6,800
553,420 19,765 X 19,765
1,777,300 63,475 X 63,475
CANON INC COMMON 138006309 193,815 4,380 X 4,380
959,650 21,687 X 21,687
CAPITAL ONE FINL CORP COMMON 14040H105 413,369 5,900 X 5,900
1,216,285 17,360 X 17,360
3,878,660 55,360 X 55,360
CAREER EDUCATION CORP COMMON 141665109 12,922,800 290,400 X 290,400
CAREMARK RX INC COMMON 141705103 517,500 46,000 X 46,000
12,560,906 1,116,525 X 1,116,525
7,861,444 698,795 X 698,795
CAREY INTERNATIONAL INC COMMON 141750109 1,364 75 X 75
CASELLA WASTE SYS INC COMMON 147448104 2,985,863 294,900 X 294,900
1,199,205 118,440 X 118,440
CENDANT CORP COMMON 151313103 9,798 901 X 901
CERIDIAN CORP COMMON 15677T106 507,931 18,100 X 18,100
1,366,503 48,695 X 48,695
4,749,017 169,230 X 169,230
CHARLES RIVER LABORATORIES COMMON 159864107 16,660,000 490,000 X 490,000
4,885,460 143,690 X 143,690
Total 220,192,393
<PAGE>
9/30/2000 FORM 13F J. & W. SELIGMAN & CO. INCORPORATED Page 9
ITEM 1: ITEM 2: ITEM 3: ITEM 4: ITEM 5: ITEM 6: ITEM 7: ITEM 8:
SHARES OR INVST DISCRET V O T I N G A U T H O R I T Y
TITLE CUSIP FAIR MARKET PRINCIPAL SOLE OTHR (S H A R E S)
NAME OF ISSUER OF CLASS NUMBER VALUE AMOUNT SHRD MGRS (A)SOLE (B)SHARED (C)NONE
CHARTER COMMUNICATIONS INC-A COMMON 16117M107 190,308 11,700 X 11,700
126,484,834 7,776,205 X 7,776,205
9,741,402 598,895 X 598,895
CHINA MOBILE (HONG KONG) LTD COMMON 16941M109 21,625,433 666,680 X 666,680
498,986 15,383 X 15,383
CHINA UNICOM - ADR COMMON 16945R104 17,537,250 804,000 X 804,000
CHOICEPOINT INC COMMON 170388102 458,750 10,000 X 10,000
1,358,359 29,610 X 29,610
4,279,449 93,285 X 93,285
CHUBB CORP COMMON 171232101 149,170,406 1,885,250 X 1,885,250
CIENA CORP COMMON 171779101 285,592,486 2,325,435 X 2,325,435
1,288,549 10,492 X 10,492
2,517,656 20,500 X 20,500
CISCO SYS INC COMMON 17275R102 324,119,595 5,866,418 X 5,866,418
2,817,861 51,002 X 51,002
5,312,288 96,150 X 96,150
CITIGROUP INC COMMON 172967101 277,268,019 5,128,657 X 5,128,657
24,442,017 452,107 X 452,107
CLEAR CHANNEL COMMUNICATIONS COMMON 184502102 367,297,121 6,500,834 X 6,500,834
152,663 2,702 X 2,702
CLOROX CO DEL COMMON 189054109 9,934,065 251,098 X 251,098
COASTAL CORP COMMON 190441105 94,702,100 1,277,600 X 1,277,600
COCA COLA CO COMMON 191216100 91,277,904 1,655,835 X 1,655,835
1,758,212 31,895 X 31,895
3,335,063 60,500 X 60,500
COGNEX CORP COMMON 192422103 151,243,601 3,835,020 X 3,835,020
COLGATE PALMOLIVE CO COMMON 194162103 37,760 800 X 800
COMCAST CORP -CL A COMMON 200300101 2,441,250 60,000 X 60,000
COMCAST CORP COMMON 200300200 60,468,781 1,477,100 X 1,477,100
COMMERCE BANCORP INC NJ COMMON 200519106 58 1 X 1
COMMERCE ONE INC COMMON 200693109 17,627,175 224,550 X 224,550
Total 2,054,979,399
<PAGE>
9/30/2000 FORM 13F J. & W. SELIGMAN & CO. INCORPORATED Page 10
ITEM 1: ITEM 2: ITEM 3: ITEM 4: ITEM 5: ITEM 6: ITEM 7: ITEM 8:
SHARES OR INVST DISCRET V O T I N G A U T H O R I T Y
TITLE CUSIP FAIR MARKET PRINCIPAL SOLE OTHR (S H A R E S)
NAME OF ISSUER OF CLASS NUMBER VALUE AMOUNT SHRD MGRS (A)SOLE (B)SHARED (C)NONE
10,205 130 X 130
COMMERCIAL FEDERAL CORPORATION COMMON 201647104 7,367,524 385,230 X 385,230
488,644 25,550 X 25,550
COMMUNITY HEALTH SYSTEMS COMMON 203668108 626,438 19,500 X 19,500
32,383,124 1,008,035 X 1,008,035
13,887,959 432,310 X 432,310
BRASIL DISTR PAO ACU COMMON 20440T201 1,167,688 31,400 X 31,400
COMPAQ COMPUTER CORP COMMON 204493100 130,153,605 4,719,130 X 4,719,130
608,829 22,075 X 22,075
COMPLETE BUSINESS SOLUTIONS COMMON 20452F107 4,124,655 305,530 X 305,530
200,273 14,835 X 14,835
COMPUTER ASSOC INTL INC COMMON 204912109 647,697 25,715 X 25,715
COMVERSE TECHNOLOGY INC COMMON 205862402 27,351,000 253,250 X 253,250
CONAGRA FOODS, INC COMMON 205887102 80,882,992 4,031,551 X 4,031,551
17,505,133 872,530 X 872,530
CONCORD EFS INC COMMON 206197105 429,739 12,100 X 12,100
57,208,391 1,610,795 X 1,610,795
4,003,499 112,725 X 112,725
CONEXANT SYSTEMS INC COMMON 207142100 21,824,831 521,190 X 521,190
COORSTEK INC COMMON 217020106 39,828,769 1,041,275 X 1,041,275
COPART INC COMMON 217204106 4,308,188 310,500 X 310,500
CORIXA CORP COMMON 21887F100 6,964,650 138,600 X 138,600
1,965,529 39,115 X 39,115
CORN PRODS INTL INC COMMON 219023108 2,275 100 X 100
CORNING INC COMMON 219350105 194,766,660 655,780 X 655,780
2,560,140 8,620 X 8,620
4,633,200 15,600 X 15,600
CORPORATE EXECUTIVE BOARD CO COMMON 21988R102 27,398,175 680,700 X 680,700
7,684,248 190,913 X 190,913
COSINE COMMUNICATIONS INC COMMON 221222102 1,722,438 31,000 X 31,000
COSTAR GROUP INC COMMON 22160N109 18,216,580 492,340 X 492,340
Total 710,923,075
<PAGE>
9/30/2000 FORM 13F J. & W. SELIGMAN & CO. INCORPORATED Page 11
ITEM 1: ITEM 2: ITEM 3: ITEM 4: ITEM 5: ITEM 6: ITEM 7: ITEM 8:
SHARES OR INVST DISCRET V O T I N G A U T H O R I T Y
TITLE CUSIP FAIR MARKET PRINCIPAL SOLE OTHR (S H A R E S)
NAME OF ISSUER OF CLASS NUMBER VALUE AMOUNT SHRD MGRS (A)SOLE (B)SHARED (C)NONE
5,513,222 149,006 X 149,006
CORVIS INC (RESTRICTED) COMMON 221999998 14,554,552 298,020 X 298,020
COX COMMUNICATIONS INC NEW COMMON 224044107 42,075 1,100 X 1,100
COX RADIO INC COMMON 224051102 263,306 15,100 X 15,100
13,442,307 770,885 X 770,885
6,144,278 352,360 X 352,360
CREDENCE SYS CORP COMMON 225302108 131,295,000 4,376,500 X 4,376,500
CROMPTON CORPORATION COMMON 227116100 6,220,132 789,858 X 789,858
402,728 51,140 X 51,140
CROSS TIMBERS OIL CO COMMON 227573102 23,338,370 1,216,332 X 1,216,332
10,178,873 530,495 X 530,495
CROWN CORK & SEAL INC COMMON 228255105 20,684,588 1,935,400 X 1,935,400
4,374,928 409,350 X 409,350
CUBIC CORP COMMON 229669106 6,179,447 258,825 X 258,825
327,923 13,735 X 13,735
CUTTER & BUCK INC COMMON 232217109 6,462,923 519,632 X 519,632
404,020 32,484 X 32,484
CYBEAR GROUP COMMON 23243C102 3 1 X 1
CYLINK CORP COMMON 232565101 125,250 12,000 X 12,000
351,639 33,690 X 33,690
1,168,739 111,975 X 111,975
CYPRESS SEMICONDUCTOR CORP COMMON 232806109 180,293,761 4,337,895 X 4,337,895
CYTYC CORP COMMON 232946103 28,419,375 659,000 X 659,000
8,454,441 196,045 X 196,045
DQE INC COMMON 23329J104 118,369 2,950 X 2,950
DAIWA SECURITIES-UNSPONS ADR COMMON 234064202 153,011 1,305 X 1,305
699,983 5,970 X 5,970
DAL-TILE INTL INC COMMON 23426R108 10,224,250 817,940 X 817,940
563,438 45,075 X 45,075
DALLAS SEMICONDUCTOR CORP COMMON 235204104 140,649,113 4,278,300 X 4,278,300
DECODE GENETICS INC COMMON 243586104 1,911,150 74,400 X 74,400
Total 622,961,191
<PAGE>
9/30/2000 FORM 13F J. & W. SELIGMAN & CO. INCORPORATED Page 12
ITEM 1: ITEM 2: ITEM 3: ITEM 4: ITEM 5: ITEM 6: ITEM 7: ITEM 8:
SHARES OR INVST DISCRET V O T I N G A U T H O R I T Y
TITLE CUSIP FAIR MARKET PRINCIPAL SOLE OTHR (S H A R E S)
NAME OF ISSUER OF CLASS NUMBER VALUE AMOUNT SHRD MGRS (A)SOLE (B)SHARED (C)NONE
DELL COMPUTER CORP COMMON 247025109 58,967,422 1,913,750 X 1,913,750
DELPHI AUTOMOTIVE SYSTEMS COMMON 247126105 X
DEVRY INC DEL COMMON 251893103 9,812,600 260,800 X 260,800
3,675,624 97,691 X 97,691
DIAL CORP NEW COMMON 25247D101 46,431,238 3,994,085 X 3,994,085
8,639,874 743,215 X 743,215
DIALOG SEMICONDUCTOR PLC - ADR COMMON 25250P108 12,395,500 381,400 X 381,400
DIGITAL ISLAND INC COMMON 25385N101 219,375 11,700 X 11,700
652,594 34,805 X 34,805
2,044,594 109,045 X 109,045
DISNEY WALT CO COMMON 254687106 6,804,675 177,900 X 177,900
DOBSON COMMUNICATIONS CORPORATIONCOMMON 256069105 315,781 21,500 X 21,500
20,258,469 1,379,300 X 1,379,300
8,387,370 571,055 X 571,055
DOBSON COMMUNICATIONS CONVERT 256072505 X
1,181 1 X 1
DOCENT INCORPORATED COMMON 25608L106 109,875 6,000 X 6,000
5,129,331 280,100 X 280,100
1,005,356 54,900 X 54,900
DOCUMENTUM INC COMMON 256159104 422,175 5,200 X 5,200
64,245,698 791,325 X 791,325
22,915,415 282,253 X 282,253
DOLE FOOD INC COMMON 256605106 48,675,900 3,245,060 X 3,245,060
8,589,300 572,620 X 572,620
DOLLAR TREE STORES INC COMMON 256747106 210,925 5,200 X 5,200
615,942 15,185 X 15,185
1,968,701 48,535 X 48,535
DOW CHEM CO COMMON 260543103 55,615,238 2,230,185 X 2,230,185
11,897,931 477,110 X 477,110
DU PONT E I DE NEMOURS & CO COMMON 263534109 84,947 2,050 X 2,050
DURA PHARMACEUTICALS INC COMMON 26632S109 29,240,975 826,600 X 826,600
9,098,875 257,212 X 257,212
DURECT CORPORATION COMMON 266605104 436,500 29,100 X 29,100
Total 438,869,382
<PAGE>
9/30/2000 FORM 13F J. & W. SELIGMAN & CO. INCORPORATED Page 13
ITEM 1: ITEM 2: ITEM 3: ITEM 4: ITEM 5: ITEM 6: ITEM 7: ITEM 8:
SHARES OR INVST DISCRET V O T I N G A U T H O R I T Y
TITLE CUSIP FAIR MARKET PRINCIPAL SOLE OTHR (S H A R E S)
NAME OF ISSUER OF CLASS NUMBER VALUE AMOUNT SHRD MGRS (A)SOLE (B)SHARED (C)NONE
75,000 5,000 X 5,000
DYCOM INDS INC COMMON 267475101 28,646,325 688,200 X 688,200
8,171,612 196,315 X 196,315
DYNEGY INC COMMON 26816Q101 15,347,250 269,250 X 269,250
13,110 230 X 230
ECI TELECOM LTD COMMON 268258100 306,250 10,000 X 10,000
E M C CORP MASS COMMON 268648102 79,615,713 803,185 X 803,185
1,214,777 12,255 X 12,255
2,240,225 22,600 X 22,600
ENSCO INTL INC COMMON 26874Q100 501,075 13,100 X 13,100
1,453,691 38,005 X 38,005
4,652,921 121,645 X 121,645
EOG RESOURCES INC COMMON 26875P101 345,988 8,900 X 8,900
926,003 23,820 X 23,820
3,213,602 82,665 X 82,665
ECHOSTAR COMMUNICATIONS NEW COMMON 278762109 164,620,618 3,120,770 X 3,120,770
EDEN BIOSCIENCE CORPORATION COMMON 279445100 1,696,200 51,400 X 51,400
283,800 8,600 X 8,600
EL PASO NAT GAS CO COMMON 283905107 122,381,088 1,985,900 X 1,985,900
24,777,872 402,075 X 402,075
ELAN PLC COMMON 284131208 39,885,101 728,495 X 728,495
1,447,316 26,435 X 26,435
1,105,950 20,200 X 20,200
ELECTRO SCIENTIFIC INDS COMMON 285229100 106,954,747 3,044,975 X 3,044,975
ELECTRONIC ARTS INC COMMON 285512109 543,125 11,000 X 11,000
1,569,631 31,790 X 31,790
5,055,753 102,395 X 102,395
ELECTRONIC DATA SYS NEW COMMON 285661104 65,658,188 1,582,125 X 1,582,125
ELECTRONICS FOR IMAGING INC COMMON 286082102 206,269,775 8,169,100 X 8,169,100
EMBRAER AIRCRAFT CORP - ADR COMMON 29081M102 1,240,000 40,000 X 40,000
EMBRATEL PARTICIPACOES COMMON 29081N100 782,550 42,300 X 42,300
EMMIS BROADCASTING CORP COMMON 291525103 7,957,125 321,500 X 321,500
Total 898,952,380
<PAGE>
9/30/2000 FORM 13F J. & W. SELIGMAN & CO. INCORPORATED Page 14
ITEM 1: ITEM 2: ITEM 3: ITEM 4: ITEM 5: ITEM 6: ITEM 7: ITEM 8:
SHARES OR INVST DISCRET V O T I N G A U T H O R I T Y
TITLE CUSIP FAIR MARKET PRINCIPAL SOLE OTHR (S H A R E S)
NAME OF ISSUER OF CLASS NUMBER VALUE AMOUNT SHRD MGRS (A)SOLE (B)SHARED (C)NONE
1,952,899 78,905 X 78,905
ENDOCARE INC COMMON 29264P104 14,968,525 757,900 X 757,900
4,055,564 205,345 X 205,345
ENRON CORP COMMON 293561106 17,577,137 200,595 X 200,595
599,793 6,845 X 6,845
1,134,744 12,950 X 12,950
ENTEGRIS INC COMMON 29362U104 44,844,778 4,689,650 X 4,689,650
ENTRAVISION COMMUNICATIONS COMMON 29382R107 8,684,025 499,800 X 499,800
2,025,022 116,548 X 116,548
EQUITABLE RES INC COMMON 294549100 10,981,937 173,285 X 173,285
838,768 13,235 X 13,235
ERICSSON L M TEL CO COMMON 294821400 92,060 6,215 X 6,215
462,431 31,219 X 31,219
EUROPEJSKI FUNDUSZ LEASINGOWY COMMON 298793100 300,000 20,000 X 20,000
EVOLVE SOFTWARE INC COMMON 30049P104 10,243,200 426,800 X 426,800
1,677,600 69,900 X 69,900
EXAR CORP COMMON 300645108 10,490,700 86,700 X 86,700
3,819,365 31,565 X 31,565
EXODUS COMMUNICATIONS INC COMMON 302088109 1,481 30 X 30
EXPEDITORS INTL WASH INC COMMON 302130109 12,959,975 287,600 X 287,600
4,218,661 93,618 X 93,618
EXTREME NETWORKS INC COMMON 30226D106 480,900 4,200 X 4,200
16,597,348 144,955 X 144,955
4,407,678 38,495 X 38,495
EXXON MOBIL CORP COMMON 30231G102 121,900,630 1,367,749 X 1,367,749
170,318 1,911 X 1,911
FAIRCHILD SEMICON INTL - CL A COMMON 303726103 118,261,266 4,204,845 X 4,204,845
FAMILY DLR STORES INC COMMON 307000109 333,025 17,300 X 17,300
820,724 42,635 X 42,635
3,096,748 160,870 X 160,870
FEDERAL NATL MTG ASSN COMMON 313586109 182,841,087 2,557,218 X 2,557,218
21,284,621 297,687 X 297,687
FIRST DATA CORP COMMON 319963104 141,352,734 3,618,630 X 3,618,630
Total 763,475,741
<PAGE>
9/30/2000 FORM 13F J. & W. SELIGMAN & CO. INCORPORATED Page 15
ITEM 1: ITEM 2: ITEM 3: ITEM 4: ITEM 5: ITEM 6: ITEM 7: ITEM 8:
SHARES OR INVST DISCRET V O T I N G A U T H O R I T Y
TITLE CUSIP FAIR MARKET PRINCIPAL SOLE OTHR (S H A R E S)
NAME OF ISSUER OF CLASS NUMBER VALUE AMOUNT SHRD MGRS (A)SOLE (B)SHARED (C)NONE
FISERV INC COMMON 337738108 458,044 7,650 X 7,650
1,388,082 23,183 X 23,183
4,285,254 71,570 X 71,570
FORD MTR CO DEL COMMON 345370100 2,095 45 X 45
FORD MOTOR COMPANY COMMON 345370860 78,718,199 3,109,855 X 3,109,855
15,087,414 596,046 X 596,046
FOREST LABS INC COMMON 345838106 550,500 4,800 X 4,800
1,725,473 15,045 X 15,045
5,156,350 44,960 X 44,960
FORRESTER RESH INC COMMON 346563109 30,235,988 474,290 X 474,290
8,476,200 132,960 X 132,960
FORT JAMES CORP COMMON 347471104 62,569,048 2,047,249 X 2,047,249
14,733,417 482,075 X 482,075
FORTIS (NL) - SPONS ADR COMMON 34956J101 122,852 4,012 X 4,012
612,085 19,989 X 19,989
FREDS INC COMMON 356108100 9,463,195 421,758 X 421,758
684,793 30,520 X 30,520
FREEMARKETS INC COMMON 356602102 10,688,088 187,100 X 187,100
3,328,788 58,272 X 58,272
FUJITSU LTD - UNSPON ADR COMMON 359590304 70,265 605 X 605
355,739 3,063 X 3,063
FURNITURE BRANDS INTL INC COMMON 360921100 6,594,306 396,650 X 396,650
390,023 23,460 X 23,460
GKN PUB LTD COMMON 361755606 70,590 7,095 X 7,095
354,441 35,625 X 35,625
GALILEO INTERNATIONAL INC COMMON 363547100 20,587,100 1,328,200 X 1,328,200
GARTNER GROUP INC COMMON 366651107 225,525 19,400 X 19,400
29,649,563 2,550,500 X 2,550,500
2,104,299 181,015 X 181,015
GARTNER GROUP INC - CL B COMMON 366651206 224,025 20,600 X 20,600
604,161 55,555 X 55,555
2,086,804 191,890 X 191,890
GATEWAY INC. COMMON 367626108 19,289,050 412,600 X 412,600
Total 330,891,753
<PAGE>
9/30/2000 FORM 13F J. & W. SELIGMAN & CO. INCORPORATED Page 16
ITEM 1: ITEM 2: ITEM 3: ITEM 4: ITEM 5: ITEM 6: ITEM 7: ITEM 8:
SHARES OR INVST DISCRET V O T I N G A U T H O R I T Y
TITLE CUSIP FAIR MARKET PRINCIPAL SOLE OTHR (S H A R E S)
NAME OF ISSUER OF CLASS NUMBER VALUE AMOUNT SHRD MGRS (A)SOLE (B)SHARED (C)NONE
GEMINI GENOMICS PLC - ADR COMMON 36865M109 14,375 1,000 X 1,000
GEMSTAR - TV GUIDE INTL INC COMMON 36866W106 1,395 16 X 16
GENERAL DYNAMICS CORP COMMON 369550108 28,254,633 449,825 X 449,825
812,480 12,935 X 12,935
1,821,563 29,000 X 29,000
GENERAL ELEC CO COMMON 369604103 285,541,184 4,949,793 X 4,949,793
1,941,184 33,650 X 33,650
3,478,556 60,300 X 60,300
GENERAL MTRS CORP COMMON 370442105 83,823,675 1,289,595 X 1,289,595
12,440,220 191,388 X 191,388
GENERAL MOTORS CORP-CLASS H COMMON 370442832 22,958,650 617,500 X 617,500
762,190 20,500 X 20,500
1,410,981 37,950 X 37,950
GENOMIC SOLUTIONS COMMON 37243R109 15,592,500 907,200 X 907,200
5,130,933 298,527 X 298,527
GENUINE PARTS CO COMMON 372460105 13,344 700 X 700
GEORGIA PAC CORP COMMON 373298108 69,407,133 2,953,495 X 2,953,495
13,274,257 564,862 X 564,862
GEOGRAPHIC NETWORKS AFFILIATES INCOMMON 373999994 1,000,000 10,000 X 10,000
GLOBAL CROSSING CP 144A CONVERT 37932J301 14,279,844 73,750 X 73,750
GLOBAL TELESYSTEMS , INC. COMMON 37936U104 10,709,100 2,347,200 X 2,347,200
3,320,291 727,735 X 727,735
GLOBESPAN INC COMMON 379571102 18,983,200 155,600 X 155,600
15,250 125 X 125
GOODRICH B F CO COMMON 382388106 103,034,910 2,629,280 X 2,629,280
18,283,007 466,552 X 466,552
GOTO.COM INC COMMON 38348T107 10,098,000 612,000 X 612,000
3,084,428 186,935 X 186,935
AUTONOMY CORPORATION PLC - ORD COMMON 4012001 8,542,875 163,500 X 163,500
GUIDANT CORP COMMON 401698105 134,057,077 1,896,475 X 1,896,475
1,393,958 19,720 X 19,720
2,862,844 40,500 X 40,500
Total 876,344,033
<PAGE>
9/30/2000 FORM 13F J. & W. SELIGMAN & CO. INCORPORATED Page 17
ITEM 1: ITEM 2: ITEM 3: ITEM 4: ITEM 5: ITEM 6: ITEM 7: ITEM 8:
SHARES OR INVST DISCRET V O T I N G A U T H O R I T Y
TITLE CUSIP FAIR MARKET PRINCIPAL SOLE OTHR (S H A R E S)
NAME OF ISSUER OF CLASS NUMBER VALUE AMOUNT SHRD MGRS (A)SOLE (B)SHARED (C)NONE
HSBC HOLDINGS PLC -SPON ADR COMMON 404280406 112,812 1,580 X 1,580
518,364 7,260 X 7,260
HACI OMER SABANCI HLDG ADR COMMON 40450N209 89,406 44,100 X 44,100
HALLIBURTON CO COMMON 406216101 7,110,619 145,300 X 145,300
HANOVER COMPRESSOR CO COMMON 410768105 438,069 13,300 X 13,300
1,273,528 38,665 X 38,665
4,089,355 124,155 X 124,155
HARLEY DAVIDSON INC COMMON 412822108 28,092,859 586,796 X 586,796
661,680 13,821 X 13,821
1,189,694 24,850 X 24,850
HARMAN INTL INDS INC COMMON 413086109 10,121,426 258,860 X 258,860
618,171 15,810 X 15,810
HARRAHS ENTMT INC COMMON 413619107 385,000 14,000 X 14,000
855,388 31,105 X 31,105
3,580,775 130,210 X 130,210
HARRIS CORP DEL COMMON 413875105 193,375 6,800 X 6,800
545,289 19,175 X 19,175
1,730,138 60,840 X 60,840
HARTFORD FINL SVCS GROUP INC COMMON 416515104 16,753,744 229,700 X 229,700
HASBRO INC COMMON 418056107 6,863 600 X 600
HAVAS ADVERTISING - ADR W/I COMMON 419313101 451,137 30,847 X 30,847
1,410,713 96,459 X 96,459
4,222,852 288,742 X 288,742
HEALTH MGMT ASSOC INC NEW COMMON 421933102 874,125 42,000 X 42,000
2,525,389 121,340 X 121,340
7,941,530 381,575 X 381,575
HENRY JACK & ASSOC INC COMMON 426281101 19,709,600 454,400 X 454,400
5,664,862 130,602 X 130,602
HEWLETT PACKARD CO COMMON 428236103 97,000 1,000 X 1,000
HOME DEPOT INC COMMON 437076102 4,245,000 80,000 X 80,000
HONEYWELL INTL COMMON 438516106 73,675,884 2,068,095 X 2,068,095
12,200,458 342,469 X 342,469
HOUSEHOLD INTL INC COMMON 441815107 5,039,625 89,000 X 89,000
Total 216,424,728
<PAGE>
9/30/2000 FORM 13F J. & W. SELIGMAN & CO. INCORPORATED Page 18
ITEM 1: ITEM 2: ITEM 3: ITEM 4: ITEM 5: ITEM 6: ITEM 7: ITEM 8:
SHARES OR INVST DISCRET V O T I N G A U T H O R I T Y
TITLE CUSIP FAIR MARKET PRINCIPAL SOLE OTHR (S H A R E S)
NAME OF ISSUER OF CLASS NUMBER VALUE AMOUNT SHRD MGRS (A)SOLE (B)SHARED (C)NONE
HUMANA INC COMMON 444859102 91,231,864 8,486,685 X 8,486,685
17,090,619 1,589,825 X 1,589,825
HUMAN GENOME SCIENCES INC COMMON 444903108 11,919,656 68,850 X 68,850
9,522 55 X 55
HYPERION SOLUTIONS CORP COMMON 44914M104 13,752,563 531,500 X 531,500
IDEC PHARMACEUTICALS CORP COMMON 449370105 561,150 3,200 X 3,200
14,710,898 83,890 X 83,890
5,282,701 30,125 X 30,125
IMS HEALTH INC COMMON 449934108 412,925 19,900 X 19,900
1,218,440 58,720 X 58,720
3,851,719 185,625 X 185,625
ITC DELTACOM INC COMMON 45031T104 14,318,650 1,245,100 X 1,245,100
4,221,133 367,055 X 367,055
IASIAWORKS INC COMMON 45072L101 6,802,000 680,200 X 680,200
ILLINOIS TOOL WKS INC COMMON 452308109 2,235,000 40,000 X 40,000
ILLUMINET HOLDINGS INC COMMON 452334105 3,416,025 123,100 X 123,100
1,971,665 71,051 X 71,051
IMMUNEX CORP NEW COMMON 452528102 7,975,725 183,350 X 183,350
3,698 85 X 85
INDYMAC BANCORP, INC. COMMON 456607100 481,163 23,400 X 23,400
11,316,449 550,344 X 550,344
5,170,749 251,465 X 251,465
INET TECHNOLOGIES COMMON 45662V105 10,377,900 354,800 X 354,800
2,944,510 100,667 X 100,667
INFOCUS CORPORATION COMMON 45665B106 3,190,600 60,200 X 60,200
INFORMATION HOLDINGS INC COMMON 456727106 14,975,888 422,600 X 422,600
6,455,082 182,154 X 182,154
INFOSPACE.COM INC COMMON 45678T102 4,867,225 160,900 X 160,900
4,689 155 X 155
INFOUSA INC. COMMON 456818301 3,027,500 605,500 X 605,500
1,588,500 317,700 X 317,700
ING GROEP N V COMMON 456837103 105,861 1,607 X 1,607
Total 265,492,066
<PAGE>
9/30/2000 FORM 13F J. & W. SELIGMAN & CO. INCORPORATED Page 19
ITEM 1: ITEM 2: ITEM 3: ITEM 4: ITEM 5: ITEM 6: ITEM 7: ITEM 8:
SHARES OR INVST DISCRET V O T I N G A U T H O R I T Y
TITLE CUSIP FAIR MARKET PRINCIPAL SOLE OTHR (S H A R E S)
NAME OF ISSUER OF CLASS NUMBER VALUE AMOUNT SHRD MGRS (A)SOLE (B)SHARED (C)NONE
515,538 7,826 X 7,826
INSIGHT ENTERPRISES INC COMMON 45765U103 21,140,550 775,800 X 775,800
6,246,981 229,247 X 229,247
INSIGNIA FINANCIAL GROUP INC COMMON 45767A105 72 7 X 7
INRANGE TECHNOLOGIES CORP COMMON 45769V206 5,300,000 100,000 X 100,000
INTEGRATED DEVICE TECHNOLOGY COMMON 458118106 531,555,370 5,873,540 X 5,873,540
INTEL CORP COMMON 458140100 373,509,303 8,986,690 X 8,986,690
1,764,370 42,451 X 42,451
3,079,781 74,100 X 74,100
INTERMUNE PHARMACEUTICALS COMMON 45885B100 23,821,175 439,100 X 439,100
9,319,879 171,795 X 171,795
INTERNATIONAL BUSINESS MACHS COMMON 459200101 95,128,875 845,590 X 845,590
959,963 8,533 X 8,533
1,096,875 9,750 X 9,750
INTL PAPER CO COMMON 460146103 5,738 200 X 200
X
INTERNATIONAL RECTIFIER CORP COMMON 460254105 92,175,883 1,825,265 X 1,825,265
INTERNET SECURITY SYSTEMS, INC. COMMON 46060X107 315,525 4,200 X 4,200
54,856,275 730,200 X 730,200
18,696,885 248,877 X 248,877
INTERPUBLIC GROUP COS INC COMMON 460690100 1,294,375 38,000 X 38,000
INTERWOVEN INC COMMON 46114T102 169,594 1,500 X 1,500
19,045,378 168,450 X 168,450
7,081,330 62,632 X 62,632
INTERWOVEN INC-RESTRICTE COMMON 46114T999 45 X
INTUIT COMMON 461202103 592,800 10,400 X 10,400
58,159,380 1,020,340 X 1,020,340
5,533,275 97,075 X 97,075
INVITROGEN CORP COMMON 46185R100 419,638 5,900 X 5,900
1,087,501 15,290 X 15,290
3,881,647 54,575 X 54,575
I2 TECHNOLOGIES INC COMMON 465754109 10,850 58 X 58
JDS UNIPHASE CORP COMMON 46612J101 38,588,470 407,535 X 407,535
Total 1,375,353,318
<PAGE>
9/30/2000 FORM 13F J. & W. SELIGMAN & CO. INCORPORATED Page 20
ITEM 1: ITEM 2: ITEM 3: ITEM 4: ITEM 5: ITEM 6: ITEM 7: ITEM 8:
SHARES OR INVST DISCRET V O T I N G A U T H O R I T Y
TITLE CUSIP FAIR MARKET PRINCIPAL SOLE OTHR (S H A R E S)
NAME OF ISSUER OF CLASS NUMBER VALUE AMOUNT SHRD MGRS (A)SOLE (B)SHARED (C)NONE
512,259 5,410 X 5,410
946,875 10,000 X 10,000
JDA SOFTWARE GROUP INC COMMON 46612K108 7,720,125 605,500 X 605,500
2,755,568 216,123 X 216,123
JACK IN THE BOX INC COMMON 466367109 7,131,506 332,665 X 332,665
537,974 25,095 X 25,095
JOHNSON & JOHNSON COMMON 478160104 55,114,540 586,715 X 586,715
183,648 1,955 X 1,955
JUNIPER NETWORKS INC COMMON 48203R104 78,582,142 358,925 X 358,925
975,367 4,455 X 4,455
1,817,181 8,300 X 8,300
KLA-TENCORP CORP COMMON 482480100 107,234,128 2,603,560 X 2,603,560
KOZMO.COM, INC. COMMON 48299E959 2,520,000 1,400,000 X 1,400,000
KANA COMMUNICATIONS INC COMMON 483600102 33,833,128 1,520,590 X 1,520,590
KENNAMETAL INC COMMON 489170100 15,450 600 X 600
KIMBERLY CLARK CORP COMMON 494368103 91,880,156 1,646,229 X 1,646,229
16,485,785 295,378 X 295,378
KINDER MORGAN INC COMMON 49455P101 11,640,578 284,350 X 284,350
10,030 245 X 245
KING PHARMACEUTICALS INC COMMON 495582108 17,437,656 521,500 X 521,500
4,534,125 135,600 X 135,600
PHILIPS ELECTRONICS - NY SHARES COMMON 500472303 253,343 5,961 X 5,961
832,745 19,594 X 19,594
KOPIN CORP COMMON 500600101 3,578,400 198,800 X 198,800
1,117,440 62,080 X 62,080
LAM RESH CORP COMMON 512807108 78,492,803 3,748,910 X 3,748,910
LAMSON & SESSIONS CO COMMON 513696104 4,418,438 372,079 X 372,079
303,169 25,530 X 25,530
LATTICE SEMICONDUCTOR CORP COMMON 518415104 325,814,763 6,061,670 X 6,061,670
LEARNING TREE INTL INC COMMON 522015106 18,921,413 397,300 X 397,300
6,020,419 126,413 X 126,413
LEXMARK INTERNATIONAL, INC. COMMON 529771107 70,781,250 1,887,500 X 1,887,500
Total 952,402,402
<PAGE>
9/30/2000 FORM 13F J. & W. SELIGMAN & CO. INCORPORATED Page 21
ITEM 1: ITEM 2: ITEM 3: ITEM 4: ITEM 5: ITEM 6: ITEM 7: ITEM 8:
SHARES OR INVST DISCRET V O T I N G A U T H O R I T Y
TITLE CUSIP FAIR MARKET PRINCIPAL SOLE OTHR (S H A R E S)
NAME OF ISSUER OF CLASS NUMBER VALUE AMOUNT SHRD MGRS (A)SOLE (B)SHARED (C)NONE
LIBERTY DIGITAL CLASS A COMMON 530436104 607,500 30,000 X 30,000
LIBERTY FINL COS INC COMMON 530512102 6,766,708 287,945 X 287,945
409,370 17,420 X 17,420
LINCARE HLDGS INC COMMON 532791100 258,188 9,000 X 9,000
790,197 27,545 X 27,545
2,436,716 84,940 X 84,940
LINCOLN NATL CORP IND COMMON 534187109 16,362,500 340,000 X 340,000
LINEAR TECHNOLOGY CORP COMMON 535678106 446,775 6,900 X 6,900
86,464,884 1,335,365 X 1,335,365
4,078,926 62,995 X 62,995
LIZ CLAIBORNE INC COMMON 539320101 11,550 300 X 300
LUCENT TECHNOLOGIES INC COMMON 549463107 68,333,930 2,235,875 X 2,235,875
1,141,815 37,360 X 37,360
2,009,484 65,750 X 65,750
MBNA CORP COMMON 55262L100 5,572,875 144,750 X 144,750
MMC NETWORKS INC COMMON 55308N102 417,450 3,300 X 3,300
1,229,580 9,720 X 9,720
3,932,253 31,085 X 31,085
MSC INDL DIRECT INC COMMON 553530106 215,025 14,100 X 14,100
12,739,621 835,385 X 835,385
4,902,540 321,478 X 321,478
MACROMEDIA INC COMMON 556100105 244,752,778 3,028,650 X 3,028,650
MACRONIX INTL CO LTD-SP ADR COMMON 556103109 1,230,130 80,008 X 80,008
MATAV RT- MAGYAR TAVKOZLESI COMMON 559776109 56,432 2,395 X 2,395
298,348 12,662 X 12,662
MAINSPRING INC COMMON 56062U100 2,568,913 345,400 X 345,400
651,860 87,645 X 87,645
MAINSPRING INC (RESTRICTED) COMMON 560A99994 1,586,669 266,667 X 266,667
MANUGISTICS GROUP INC COMMON 565011103 961,625 9,800 X 9,800
2,791,166 28,445 X 28,445
8,781,697 89,495 X 89,495
MARCHFIRST INC COMMON 566244109 77,096,046 4,914,489 X 4,914,489
Total 559,903,549
<PAGE>
9/30/2000 FORM 13F J. & W. SELIGMAN & CO. INCORPORATED Page 22
ITEM 1: ITEM 2: ITEM 3: ITEM 4: ITEM 5: ITEM 6: ITEM 7: ITEM 8:
SHARES OR INVST DISCRET V O T I N G A U T H O R I T Y
TITLE CUSIP FAIR MARKET PRINCIPAL SOLE OTHR (S H A R E S)
NAME OF ISSUER OF CLASS NUMBER VALUE AMOUNT SHRD MGRS (A)SOLE (B)SHARED (C)NONE
MARCONI PLC-SPONS ADR COMMON 566306205 87,652 3,201 X 3,201
411,372 15,023 X 15,023
MARSH & MCLENNAN COS INC COMMON 571748102 36,700,729 276,465 X 276,465
1,271,745 9,580 X 9,580
2,362,950 17,800 X 17,800
MARSHALL & ILSLEY CORP COMMON 571834100 250,625 5,000 X 5,000
699,244 13,950 X 13,950
2,272,166 45,330 X 45,330
MATRIXONE INC COMMON 57685P304 22,924,000 573,100 X 573,100
6,813,000 170,325 X 170,325
MAXIM INTEGRATED PRODS INC COMMON 57772K101 77,690,559 965,850 X 965,850
12,066 150 X 150
MCDATA CORPORATION COMMON 580031102 25,616,551 208,450 X 208,450
MCLEODUSA INC CLASS A COMMON 582266102 675,836 47,220 X 47,220
4,337 303 X 303
MEAD CORP COMMON 582834107 81,579 3,490 X 3,490
MEDICIS PHARMACEUTICAL CORP COMMON 584690309 528,900 8,600 X 8,600
1,551,953 25,235 X 25,235
4,761,638 77,425 X 77,425
MEDIMMUNE INC COMMON 584699102 17,025,900 220,400 X 220,400
15,836 205 X 205
MEDTRONIC INC COMMON 585055106 141,388,592 2,728,851 X 2,728,851
22,716,621 438,439 X 438,439
1,339,353 25,850 X 25,850
MELLON FINANCIAL COMMON 58551A108 64,925 1,400 X 1,400
MEMBERWORKS INC COMMON 586002107 30,901,843 939,980 X 939,980
10,232,344 311,250 X 311,250
MERCK & CO INC COMMON 589331107 65,399,299 878,580 X 878,580
MERCURY INTERACTIVE CORP COMMON 589405109 25,040,813 159,750 X 159,750
18,026 115 X 115
MERRILL LYNCH & CO INC COMMON 590188108 93,485,700 1,416,450 X 1,416,450
METAWAVE COMMUNICATIONS CORP COMMON 591409107 14,571,989 795,740 X 795,740
Total 606,918,141
<PAGE>
9/30/2000 FORM 13F J. & W. SELIGMAN & CO. INCORPORATED Page 23
ITEM 1: ITEM 2: ITEM 3: ITEM 4: ITEM 5: ITEM 6: ITEM 7: ITEM 8:
SHARES OR INVST DISCRET V O T I N G A U T H O R I T Y
TITLE CUSIP FAIR MARKET PRINCIPAL SOLE OTHR (S H A R E S)
NAME OF ISSUER OF CLASS NUMBER VALUE AMOUNT SHRD MGRS (A)SOLE (B)SHARED (C)NONE
3,540,722 193,350 X 193,350
METRIS COS INC COMMON 591598107 57,355,975 1,452,050 X 1,452,050
16,454,160 416,561 X 416,561
METTLER TOLEDO INTERNATIONAL COMMON 592688105 10,362,000 235,500 X 235,500
8,800 200 X 200
MICROSOFT CORP COMMON 594918104 448,403,052 7,434,662 X 7,434,662
2,204,965 36,559 X 36,559
3,998,719 66,300 X 66,300
MICROCHIP TECHNOLOGY INC COMMON 595017104 123,984 3,750 X 3,750
228,068,861 6,898,113 X 6,898,113
1,159,006 35,055 X 35,055
MICRON TECHNOLOGY INC COMMON 595112103 75,982,800 1,651,800 X 1,651,800
MIDCOAST ENERGY RESOURCES COMMON 59563W104 11,944,016 580,864 X 580,864
791,759 38,505 X 38,505
MICROCOSM TECHNOLOGIES INC. COMMON 595999939 7,500,001 1,173,709 X 1,173,709
MICROTUNE (RESTRICTED) COMMON 59599A993 21,425,000 500,000 X 500,000
MILLENNIUM PHARMACEUTICALS INC COMMON 599902103 6,463,266 44,250 X 44,250
6,573 45 X 45
MILLIPORE CORP COMMON 601073109 17,989,688 371,400 X 371,400
15,742 325 X 325
MINERALS TECHNOLOGIES INC COMMON 603158106 19,414,760 422,060 X 422,060
521,180 11,330 X 11,330
MITCHELL ENERGY & DEV CORP COMMON 606592202 3,543,500 76,000 X 76,000
MOBILITY ELECTRONICS INC COMMON 60741U101 2,179,963 238,900 X 238,900
MORGAN J P & CO INC COMMON 616880100 32,675 200 X 200
MUELLER INDS INC COMMON 624756102 4,994,475 222,595 X 222,595
292,922 13,055 X 13,055
MUTUAL RISK MGMT LTD COMMON 628351108 10,507,295 478,965 X 478,965
729,312 33,245 X 33,245
NCO GROUP INC COMMON 628858102 129,438 10,900 X 10,900
353,044 29,730 X 29,730
1,200,681 101,110 X 101,110
Total 957,698,331
<PAGE>
9/30/2000 FORM 13F J. & W. SELIGMAN & CO. INCORPORATED Page 24
ITEM 1: ITEM 2: ITEM 3: ITEM 4: ITEM 5: ITEM 6: ITEM 7: ITEM 8:
SHARES OR INVST DISCRET V O T I N G A U T H O R I T Y
TITLE CUSIP FAIR MARKET PRINCIPAL SOLE OTHR (S H A R E S)
NAME OF ISSUER OF CLASS NUMBER VALUE AMOUNT SHRD MGRS (A)SOLE (B)SHARED (C)NONE
NDS GROUP PLC-SPONSORED ADR COMMON 628891103 8,847,300 114,900 X 114,900
NTL INC COMMON 629407107 250,088 5,400 X 5,400
16,198,723 349,770 X 349,770
2,334,150 50,400 X 50,400
CONVERT 629407AL1 15,945,000 12,000,000 X 12,000,000
NTT DOCOMO INC COMMON 62942M201 205,833 1,435 X 1,435
1,072,339 7,476 X 7,476
NABISCO GROUP HOLDINGS COMMON 62952P102 17,100 600 X 600
NATIONAL INSTRS CORP COMMON 636518102 421,394 9,550 X 9,550
1,318,455 29,880 X 29,880
3,906,166 88,525 X 88,525
NATIONAL-OILWELL INC COMMON 637071101 11,643,750 372,600 X 372,600
3,570,625 114,260 X 114,260
NATIONAL SEMICONDUCTOR CORP COMMON 637640103 246,976,214 6,136,055 X 6,136,055
NESTLE S A COMMON 641069406 148,921 1,430 X 1,430
688,578 6,612 X 6,612
NETIQ CORP COMMON 64115P102 295,594 4,500 X 4,500
23,310,523 354,870 X 354,870
8,741,495 133,077 X 133,077
NETWORK APPLIANCE INC COMMON 64120L104 35,625,514 279,690 X 279,690
777,879 6,107 X 6,107
1,401,125 11,000 X 11,000
NEW ERA OF NETWORKS INC COMMON 644312100 2,432,813 100,000 X 100,000
NEWFIELD EXPL CO COMMON 651290108 424,856 9,100 X 9,100
1,227,181 26,285 X 26,285
3,956,065 84,735 X 84,735
NEWPORT NEWS SHIPBUILDING INC COMMON 652228107 14,014,463 323,100 X 323,100
9,976 230 X 230
NEWS CORP LTD COMMON 652487703 33,638 600 X 600
NEWS CORP LTD- SPONS ADR PRF COMMON 652487802 32,813 700 X 700
NEXTEL COMMUNICATIONS CONVERT 65332VAY9 4,674,800 4,960,000 X 4,960,000
37,700 40,000 X 40,000
NICE SYSTEMS LTD-SPONS ADR COMMON 653656108 28,800 400 X 400
Total 410,569,868
<PAGE>
9/30/2000 FORM 13F J. & W. SELIGMAN & CO. INCORPORATED Page 25
ITEM 1: ITEM 2: ITEM 3: ITEM 4: ITEM 5: ITEM 6: ITEM 7: ITEM 8:
SHARES OR INVST DISCRET V O T I N G A U T H O R I T Y
TITLE CUSIP FAIR MARKET PRINCIPAL SOLE OTHR (S H A R E S)
NAME OF ISSUER OF CLASS NUMBER VALUE AMOUNT SHRD MGRS (A)SOLE (B)SHARED (C)NONE
NIPPON TELEG & TEL CORP COMMON 654624105 156,065 3,185 X 3,185
782,138 15,962 X 15,962
NOKIA CORP-SPONSORED ADR A COMMON 654902204 3,479,613 87,400 X 87,400
NORFOLK SOUTHERN CORP COMMON 655844108 5,850 400 X 400
NORTEL NETWORKS CORP (HLDG) COMMON 656568102 141,139,896 2,369,610 X 2,369,610
482,099 8,094 X 8,094
1,816,656 30,500 X 30,500
NOVARTIS A G COMMON 66987V109 82,211 2,125 X 2,125
404,517 10,456 X 10,456
NOVELLUS SYS INC COMMON 670008101 528,665,969 11,353,900 X 11,353,900
NYFIX INC COMMON 670712108 10,548,202 235,714 X 235,714
3,612,489 80,726 X 80,726
OLYMPIC STEEL INC COMMON 68162K106 912,650 365,060 X 365,060
41,463 16,585 X 16,585
OMNICARE INC COMMON 681904108 9,709,443 602,136 X 602,136
675,960 41,920 X 41,920
ONI SYSTEMS CORP COMMON 68273F103 975,331 11,300 X 11,300
ONYX SOFTWARE CORP COMMON 683402101 10,139,250 491,600 X 491,600
3,400,176 164,857 X 164,857
ORACLE CORP COMMON 68389X105 94,106,644 1,195,005 X 1,195,005
1,488,375 18,900 X 18,900
2,752,313 34,950 X 34,950
ORASCOM TELECOM HOLDING SAE COMMON 68554W106 971,250 150,000 X 150,000
OUTBACK STEAKHOUSE INC COMMON 689899102 3,255,000 120,000 X 120,000
OXFORD HEALTH PLANS INC COMMON 691471106 276,609 9,000 X 9,000
12,856,496 418,310 X 418,310
3,303,638 107,490 X 107,490
PC-TEL INC COMMON 69325Q105 7,909,650 340,200 X 340,200
2,760,217 118,719 X 118,719
PE CORP-PE BIOSYSTEMS GROUP COMMON 69332S102 15,925,550 136,700 X 136,700
378,625 3,250 X 3,250
518,425 4,450 X 4,450
Total 863,532,767
<PAGE>
9/30/2000 FORM 13F J. & W. SELIGMAN & CO. INCORPORATED Page 26
ITEM 1: ITEM 2: ITEM 3: ITEM 4: ITEM 5: ITEM 6: ITEM 7: ITEM 8:
SHARES OR INVST DISCRET V O T I N G A U T H O R I T Y
TITLE CUSIP FAIR MARKET PRINCIPAL SOLE OTHR (S H A R E S)
NAME OF ISSUER OF CLASS NUMBER VALUE AMOUNT SHRD MGRS (A)SOLE (B)SHARED (C)NONE
PE CORP-CELERA GENOMICS GRP COMMON 69332S201 199 2 X 2
P.F. CHANGS CHINA BISTRO INC COMMON 69333Y108 1,766,144 51,100 X 51,100
307,606 8,900 X 8,900
PMC-SIERRA INC COMMON 69344F106 62,331,019 289,575 X 289,575
1,036,214 4,814 X 4,814
2,346,225 10,900 X 10,900
PACTIV CORPORATION COMMON 695257105 2,238 200 X 200
PALM INC COMMON 696642107 24,224,200 457,600 X 457,600
19,587 370 X 370
PARAMETRIC TECHNOLOGY CORP COMMON 699173100 113,057,656 10,336,700 X 10,336,700
PATINA OIL & GAS CORP COMMON 703224105 2,856,000 142,800 X 142,800
PEGASUS COMMUNICATIONS CORP COMMON 705904100 7,710,675 159,600 X 159,600
PENTON MEDIA INC COMMON 709668107 431,750 15,700 X 15,700
5,744,200 208,880 X 208,880
5,208,775 189,410 X 189,410
PEPSICO INC COMMON 713448108 38,352,500 833,750 X 833,750
193,982 4,217 X 4,217
PEREGRINE SYSTEMS INC COMMON 71366Q101 289,744 15,300 X 15,300
3,039,658 160,510 X 160,510
2,641,971 139,510 X 139,510
PERFORMANCE FOOD GROUP CO COMMON 713755106 10,854,813 288,500 X 288,500
4,634,572 123,178 X 123,178
PETROLEO BRASILEIRO S.A. - ADR COMMON 71654V408 1,112,313 37,000 X 37,000
PFIZER INC COMMON 717081103 125,035,223 2,782,425 X 2,782,425
1,647,409 36,660 X 36,660
3,057,997 68,050 X 68,050
PHARMACIA CORP. COMMON 71713U102 39,019,556 648,300 X 648,300
PHILIP MORRIS COS INC COMMON 718154107 92,536,193 3,143,480 X 3,143,480
15,432,992 524,263 X 524,263
PHONE.COM INC COMMON 71920Q100 47,136,763 414,845 X 414,845
787,989 6,935 X 6,935
1,386,225 12,200 X 12,200
Total 614,202,386
<PAGE>
9/30/2000 FORM 13F J. & W. SELIGMAN & CO. INCORPORATED Page 27
ITEM 1: ITEM 2: ITEM 3: ITEM 4: ITEM 5: ITEM 6: ITEM 7: ITEM 8:
SHARES OR INVST DISCRET V O T I N G A U T H O R I T Y
TITLE CUSIP FAIR MARKET PRINCIPAL SOLE OTHR (S H A R E S)
NAME OF ISSUER OF CLASS NUMBER VALUE AMOUNT SHRD MGRS (A)SOLE (B)SHARED (C)NONE
PINNACLE HOLDINGS COMMON 72346N101 19,273,838 723,900 X 723,900
5,235,167 196,626 X 196,626
PITNEY BOWES INC COMMON 724479100 200,558,223 5,085,470 X 5,085,470
PITTSTON BRINKS GROUP COMMON 725701106 7,241,895 467,219 X 467,219
455,421 29,382 X 29,382
POHANG IRON & STL LTD COMMON 730450103 807,766 43,370 X 43,370
133,541 7,170 X 7,170
POLYMEDICA CORP COMMON 731738100 12,562,375 293,000 X 293,000
3,079,068 71,815 X 71,815
POWERWAVE TECHNOLOGIES INC COMMON 739363109 37,076,484 976,500 X 976,500
POWERTEL INC COMMON 73936C109 54,308,625 714,000 X 714,000
15,456,737 203,211 X 203,211
PRAECIS PHARMACEUTICALS INC. COMMON 739421105 21,292,500 501,000 X 501,000
5,938,100 139,720 X 139,720
PRE PAID LEGAL SVCS INC COMMON 740065107 16,586,006 513,300 X 513,300
4,876,829 150,927 X 150,927
PRICE COMMUNICATIONS CORP COMMON 741437305 40,673,179 2,079,140 X 2,079,140
3,840,314 196,310 X 196,310
PRIMARK CORP COMMON 741903108 2,926 155 X 155
PRIDE INTL INC COMMON 741932107 14,278,200 538,800 X 538,800
4,091,706 154,404 X 154,404
PRIORITY HEALTHCARE CORP COMMON 74264T102 35,951,875 471,500 X 471,500
11,598,921 152,117 X 152,117
PROCTER & GAMBLE CO COMMON 742718109 84,477,620 1,260,860 X 1,260,860
1,468,640 21,920 X 21,920
2,723,550 40,650 X 40,650
PROTON ENERGY SYSTEMS COMMON 74371K101 314,875 11,000 X 11,000
48,663 1,700 X 1,700
PROVINCE HEALTHCARE CO COMMON 743977100 24,956,345 624,885 X 624,885
10,052,788 251,713 X 251,713
PROXICOM INC COMMON 744282104 22,495,200 1,153,600 X 1,153,600
PROXIM INC COMMON 744284100 53,738,200 1,207,600 X 1,207,600
Total 715,595,576
<PAGE>
9/30/2000 FORM 13F J. & W. SELIGMAN & CO. INCORPORATED Page 28
ITEM 1: ITEM 2: ITEM 3: ITEM 4: ITEM 5: ITEM 6: ITEM 7: ITEM 8:
SHARES OR INVST DISCRET V O T I N G A U T H O R I T Y
TITLE CUSIP FAIR MARKET PRINCIPAL SOLE OTHR (S H A R E S)
NAME OF ISSUER OF CLASS NUMBER VALUE AMOUNT SHRD MGRS (A)SOLE (B)SHARED (C)NONE
16,215,044 364,383 X 364,383
PSINET INC CONVERT 74437C408 4,276,422 246,125 X 246,125
32,578 1,875 X 1,875
PSI TECHNOLOGIES HOLDINGS-ADR COMMON 74438Q109 4,044,300 317,200 X 317,200
QLT, INC. COMMON 746927102 623,700 8,800 X 8,800
12,970,834 183,010 X 183,010
5,839,746 82,395 X 82,395
QUALCOMM INC COMMON 747525103 95,797,478 1,344,526 X 1,344,526
1,312,924 18,427 X 18,427
2,465,250 34,600 X 34,600
QUEST SOFTWARE INC COMMON 74834T103 42,159,844 678,800 X 678,800
8,663,016 139,480 X 139,480
QWEST COMMUNICATIONS INTL COMMON 749121109 119,202,065 2,480,147 X 2,480,147
17,886,651 372,154 X 372,154
RWE AG COMMON 74975E303 35 1 X 1
RADIOSHACK CORPORATION COMMON 750438103 141,764,308 2,193,645 X 2,193,645
25,296,810 391,440 X 391,440
RALSTON PURINA CO COMMON 751277302 29,628,325 1,250,800 X 1,250,800
RATIONAL SOFTWARE CORP COMMON 75409P202 471,750 6,800 X 6,800
215,672,306 3,108,790 X 3,108,790
4,469,831 64,430 X 64,430
RAYTHEON CO COMMON 755111309 3,395 124 X 124
755111408 37,680 1,325 X 1,325
READERS DIGEST ASSN INC COMMON 755267101 11,887,953 336,650 X 336,650
10,417 295 X 295
REDBACK NETWORKS COMMON 757209101 141,176,120 860,830 X 860,830
1,553,408 9,472 X 9,472
3,329,200 20,300 X 20,300
REMEC INC COMMON 759543101 29,516,981 1,002,700 X 1,002,700
9,827,150 333,831 X 333,831
REMEDY CORP COMMON 759548100 356,738 18,900 X 18,900
43,325,203 2,295,375 X 2,295,375
3,360,222 178,025 X 178,025
RENT WAY INC COMMON 76009U104 11,152,576 367,163 X 367,163
Total 1,004,330,259
<PAGE>
9/30/2000 FORM 13F J. & W. SELIGMAN & CO. INCORPORATED Page 29
ITEM 1: ITEM 2: ITEM 3: ITEM 4: ITEM 5: ITEM 6: ITEM 7: ITEM 8:
SHARES OR INVST DISCRET V O T I N G A U T H O R I T Y
TITLE CUSIP FAIR MARKET PRINCIPAL SOLE OTHR (S H A R E S)
NAME OF ISSUER OF CLASS NUMBER VALUE AMOUNT SHRD MGRS (A)SOLE (B)SHARED (C)NONE
813,746 26,790 X 26,790
RJ REYNOLDS TOBACCO HOLDINGS, INCCOMMON 76182K105 6,450 200 X 200
RITEK CORP -GDR- W/I COMMON 767767304 23,729 3,609 X 3,609
ROCHE HOLDINGS LTD COMMON 771195104 275,696 3,135 X 3,135
ROGERS COMMUNICATIONS - CL B COMMON 775109200 255,825 10,800 X 10,800
24,253,631 1,023,900 X 1,023,900
2,388,055 100,815 X 100,815
ROYAL BANK OF CANADA COMMON 780087102 210,035 3,530 X 3,530
ROYAL DUTCH PETE CO COMMON 780257804 85,223,633 1,421,875 X 1,421,875
ROYAL OAK MINES INC COMMON 78051D105 32 8,204 X 8,204
RURAL CELLULAR CORP - CL A COMMON 781904107 66,063,538 969,740 X 969,740
19,900,811 292,122 X 292,122
SBC COMMUNICATIONS INC COMMON 78387G103 71,096,000 1,421,920 X 1,421,920
SBA COMMUNICATIONS CORP COMMON 78388J106 36,808,544 877,700 X 877,700
10,738,726 256,065 X 256,065
SCI SYS INC COMMON 783890106 292,165,590 7,125,990 X 7,125,990
SDL INC COMMON 784076101 53,676,545 173,535 X 173,535
615,532 1,990 X 1,990
1,175,388 3,800 X 3,800
SPX CORP COMMON 784635104 19,587 138 X 138
SABRE GROUP HLDGS INC COMMON 785905100 10 X
SAFEWAY INC COMMON 786514208 95,557,174 2,046,740 X 2,046,740
20,032,439 429,075 X 429,075
ST JUDE MED INC COMMON 790849103 101,790,900 1,995,900 X 1,995,900
ST PAUL COS INC COMMON 792860108 118,727,931 2,407,664 X 2,407,664
26,884,041 545,177 X 545,177
SANMINA CORP COMMON 800907107 168,525 1,800 X 1,800
488,723 5,220 X 5,220
1,605,201 17,145 X 17,145
SARA LEE CORP COMMON 803111103 14,219 700 X 700
Total 1,030,980,255
<PAGE>
9/30/2000 FORM 13F J. & W. SELIGMAN & CO. INCORPORATED Page 30
ITEM 1: ITEM 2: ITEM 3: ITEM 4: ITEM 5: ITEM 6: ITEM 7: ITEM 8:
SHARES OR INVST DISCRET V O T I N G A U T H O R I T Y
TITLE CUSIP FAIR MARKET PRINCIPAL SOLE OTHR (S H A R E S)
NAME OF ISSUER OF CLASS NUMBER VALUE AMOUNT SHRD MGRS (A)SOLE (B)SHARED (C)NONE
123,378 6,074 X 6,074
SAWTEK INC COMMON 805468105 86,688,080 2,250,725 X 2,250,725
SCHERING PLOUGH CORP COMMON 806605101 4,705,800 101,200 X 101,200
SCHLUMBERGER LTD COMMON 806857108 99,000,536 1,202,740 X 1,202,740
672,082 8,165 X 8,165
1,111,219 13,500 X 13,500
SCHOLASTIC CORP COMMON 807066105 254,600 3,200 X 3,200
703,730 8,845 X 8,845
2,368,178 29,765 X 29,765
SCHWEITZER-MAUDUIT INTL INC COMMON 808541106 9,363 700 X 700
SCIENTIFIC ATLANTA INC COMMON 808655104 10,876,694 170,950 X 170,950
7,317 115 X 115
SCREAMINGMEDIA INC COMMON 810883108 5,759,063 614,300 X 614,300
SEAGRAM LTD COMMON 811850106 45,950 800 X 800
SCREAMING MEDIA.NET (RESTRICTED) COMMON 811C99997 8,999,865 1,199,982 X 1,199,982
SEARS ROEBUCK & CO COMMON 812387108 1,621 50 X 50
SELECTICA INC COMMON 816288104 23,326,875 585,000 X 585,000
2,031,591 50,949 X 50,949
SELIGMAN CAPITAL FD INC COMMON 816326102 2,387,258 63,219 X 63,219
SELIGMAN COM STK FD INC COMMON 816332100 449,674 30,821 X 30,821
SELIGMAN COMM&INFO FD COMMON 816333108 1,104,914 28,266 X 28,266
SELIGMAN FRONTIER FD INC COMMON 816334106 312,886 18,645 X 18,645
SELIGMAN GROWTH FD INC COMMON 816335103 1,106,648 114,558 X 114,558
SELIGMAN US GOVT SECS FD- A COMMON 816336101 591,099 88,492 X 88,492
SELIGMAN HIGH YIELD BOND FUND COMMON 816336309 1,771,251 318,651 X 318,651
SELIGMAN INTERNATIONAL GROWTH FDCOMMON 81633C108 1,319,467 82,066 X 82,066
SELIGMAN GLB SMALLER COMPANIES FDCOMMON 81633C207 1,296,109 70,134 X 70,134
SELIGMAN EMERGING MKTS FD COMMON 81633C702 714,827 116,632 X 116,632
Total 257,740,074
<PAGE>
9/30/2000 FORM 13F J. & W. SELIGMAN & CO. INCORPORATED Page 31
ITEM 1: ITEM 2: ITEM 3: ITEM 4: ITEM 5: ITEM 6: ITEM 7: ITEM 8:
SHARES OR INVST DISCRET V O T I N G A U T H O R I T Y
TITLE CUSIP FAIR MARKET PRINCIPAL SOLE OTHR (S H A R E S)
NAME OF ISSUER OF CLASS NUMBER VALUE AMOUNT SHRD MGRS (A)SOLE (B)SHARED (C)NONE
SELIGMAN GLB GROWTH FUND COMMON 81633C884 151,507 10,188 X 10,188
SELIGMAN LARGE CAP VALUE FD INC COMMON 816356109 1,138,606 103,034 X 103,034
SELIGMAN SMALL CAP VALUE-A COMMON 816356406 873,931 97,230 X 97,230
SEMTECH CORP COMMON 816850101 670,275 16,200 X 16,200
1,944,211 46,990 X 46,990
6,125,569 148,050 X 148,050
SENSORMATIC ELECTRS CORP COMMON 817265101 33,174,825 2,211,655 X 2,211,655
SHERWIN WILLIAMS CO COMMON 824348106 14,963 700 X 700
SIEBEL SYS INC COMMON 826170102 64,103,756 575,890 X 575,890
1,357,456 12,195 X 12,195
2,259,644 20,300 X 20,300
SILICON STORAGE TECHNOLOGY COMMON 827057100 29,002,809 1,066,770 X 1,066,770
SIX FLAGS, INC. COMMON 83001P109 6,190,700 399,400 X 399,400
2,572,070 165,940 X 165,940
SKYWEST INC COMMON 830879102 6,554,875 127,900 X 127,900
1,932,381 37,705 X 37,705
SMARTFORCE PUBLIC LIMITED CO COMMON 83170A206 473,750 10,000 X 10,000
15,171,370 320,240 X 320,240
10,592,197 223,582 X 223,582
SMITHKLINE BEECHAM COMMON 832378301 142,397 2,075 X 2,075
697,916 10,170 X 10,170
SMURFIT-STONE CONTAINER CORP COMMON 832727101 8,383,548 698,629 X 698,629
650,940 54,245 X 54,245
SOCIETE GENERALE FRANCE COMMON 83364L109 113,642 10,165 X 10,165
571,181 51,091 X 51,091
SOFTWARE.COM INC COMMON 83402P104 47,206,409 260,180 X 260,180
778,367 4,290 X 4,290
1,415,213 7,800 X 7,800
SONICWALL INC COMMON 835470105 26,231,400 920,400 X 920,400
7,825,388 274,575 X 274,575
SOUTHERN ENERGY INCORPORATED COMMON 842816100 216,488 6,900 X 6,900
616,205 19,640 X 19,640
Total 279,153,987
<PAGE>
9/30/2000 FORM 13F J. & W. SELIGMAN & CO. INCORPORATED Page 32
ITEM 1: ITEM 2: ITEM 3: ITEM 4: ITEM 5: ITEM 6: ITEM 7: ITEM 8:
SHARES OR INVST DISCRET V O T I N G A U T H O R I T Y
TITLE CUSIP FAIR MARKET PRINCIPAL SOLE OTHR (S H A R E S)
NAME OF ISSUER OF CLASS NUMBER VALUE AMOUNT SHRD MGRS (A)SOLE (B)SHARED (C)NONE
1,978,978 63,075 X 63,075
SOUTHTRUST CORP COMMON 844730101 487,281 15,500 X 15,500
1,405,571 44,710 X 44,710
4,540,047 144,415 X 144,415
SPECTRASITE HOLDINGS INC COMMON 84760T100 239,456 12,900 X 12,900
672,798 36,245 X 36,245
2,231,213 120,200 X 120,200
SPRINT CORP COMMON 852061100 70,094,542 2,391,285 X 2,391,285
9,722,223 331,675 X 331,675
STAPLES INC COMMON 855030102 12,490,675 880,400 X 880,400
7,378 520 X 520
STATE STR CORP COMMON 857477103 91,000 700 X 700
STATION CASINOS INC COMMON 857689103 9,081,525 637,300 X 637,300
2,312,704 162,295 X 162,295
STET HELLAS TELECOMM SA COMMON 859823106 791,350 53,200 X 53,200
STEWART & STEVENSON SVCS INC COMMON 860342104 16,948,186 971,939 X 971,939
818,865 46,960 X 46,960
STORAGENETWORKS INC COMMON 86211E103 17,382,094 170,100 X 170,100
13,284 130 X 130
SUMMIT BANCORP COMMON 866005101 114,585,713 3,321,325 X 3,321,325
22,325,123 647,105 X 647,105
SUN MICROSYSTEMS INC COMMON 866810104 22,863,153 195,830 X 195,830
649,130 5,560 X 5,560
1,482,725 12,700 X 12,700
SUNGARD DATA SYS INC COMMON 867363103 899,063 21,000 X 21,000
323,770,173 7,562,515 X 7,562,515
21,376,196 499,298 X 499,298
SURGUTNEFTEGAZ COMMON 868861204 994,500 68,000 X 68,000
SYBASE INC COMMON 871130100 623,300 27,100 X 27,100
1,745,585 75,895 X 75,895
5,717,225 248,575 X 248,575
SYBRON INTL CORP COMMON 87114F106 501,600 20,900 X 20,900
1,331,280 55,470 X 55,470
4,662,000 194,250 X 194,250
Total 674,835,933
<PAGE>
9/30/2000 FORM 13F J. & W. SELIGMAN & CO. INCORPORATED Page 33
ITEM 1: ITEM 2: ITEM 3: ITEM 4: ITEM 5: ITEM 6: ITEM 7: ITEM 8:
SHARES OR INVST DISCRET V O T I N G A U T H O R I T Y
TITLE CUSIP FAIR MARKET PRINCIPAL SOLE OTHR (S H A R E S)
NAME OF ISSUER OF CLASS NUMBER VALUE AMOUNT SHRD MGRS (A)SOLE (B)SHARED (C)NONE
SYCAMORE NETWORKS INC COMMON 871206108 35,373,780 327,535 X 327,535
583,740 5,405 X 5,405
1,069,200 9,900 X 9,900
SYMANTEC CORP COMMON 871503108 293,098,080 6,661,320 X 6,661,320
SYMBOL TECHNOLOGIES INC COMMON 871508107 2,695,313 75,000 X 75,000
SYNOPSYS INC COMMON 871607107 242,680,654 6,407,410 X 6,407,410
TDK CORP-SPONSORED ADR COMMON 872351408 117,163 910 X 910
554,913 4,310 X 4,310
T&HQ INC COMMON 872443403 13,940,700 599,600 X 599,600
13,719,360 590,080 X 590,080
TJX COS INC NEW COMMON 872540109 3,375,000 150,000 X 150,000
TTM TECHNOLOGIES COMMON 87305R109 112,800 4,800 X 4,800
17,904,650 761,900 X 761,900
1,043,400 44,400 X 44,400
TAIWAN SEMICONDUCTOR MFG LTD-ADR COMMON 874039100 10,841,884 532,117 X 532,117
TANOX INC COMMON 87588Q109 13,275,613 391,900 X 391,900
3,864,629 114,085 X 114,085
TEKTRONIX INC COMMON 879131100 64,100,415 834,505 X 834,505
TELE CELULAR SUL PART-ADR COMMON 879238103 429,000 14,300 X 14,300
TELE CENTRO OESTE CEL -ADR COMMON 87923P105 956,250 90,000 X 90,000
TELESP PARTICIPACOES SA-ADR COMMON 87929A102 953,125 61,000 X 61,000
TELEFONICA S. A. COMMON 879382208 280,188 4,714 X 4,714
706,534 11,887 X 11,887
TELEFONOS DE MEXICO S A COMMON 879403780 1,372,238 25,800 X 25,800
TENNECO AUTOMOTIVE COMMON 880349105 208 40 X 40
TERADYNE INC COMMON 880770102 108,236,100 3,092,460 X 3,092,460
TEXACO INC COMMON 881694103 86,779,665 1,652,946 X 1,652,946
16,534,980 314,952 X 314,952
TEXAS INSTRS INC COMMON 882508104 6,164,103 130,630 X 130,630
Total 940,763,682
<PAGE>
9/30/2000 FORM 13F J. & W. SELIGMAN & CO. INCORPORATED Page 34
ITEM 1: ITEM 2: ITEM 3: ITEM 4: ITEM 5: ITEM 6: ITEM 7: ITEM 8:
SHARES OR INVST DISCRET V O T I N G A U T H O R I T Y
TITLE CUSIP FAIR MARKET PRINCIPAL SOLE OTHR (S H A R E S)
NAME OF ISSUER OF CLASS NUMBER VALUE AMOUNT SHRD MGRS (A)SOLE (B)SHARED (C)NONE
209,984 4,450 X 4,450
396,375 8,400 X 8,400
3DO CO COMMON 88553W105 9,295,625 1,390,000 X 1,390,000
TICKETMASTER ONLINE-CITY B COMMON 88633P203 1,598,900 94,400 X 94,400
TIME WARNER INC COMMON 887315109 117,375 1,500 X 1,500
TOO INC. COMMON 890333107 289,750 12,200 X 12,200
7,745,944 326,145 X 326,145
4,529,244 190,705 X 190,705
TOTAL FINA ELF SA SPON ADR COMMON 89151E109 148,344 2,020 X 2,020
721,523 9,825 X 9,825
TRICON GLOBAL RESTAURANTS COMMON 895953107 2,450 80 X 80
TRIBUNE CO NEW COMMON 896047107 26,175 600 X 600
TRITON PCS HOLDINGS INC CL A COMMON 89677M106 6,369,000 231,600 X 231,600
1,844,150 67,060 X 67,060
TRUE NORTH COMMUNICATIONS INC COMMON 897844106 7,941,863 222,150 X 222,150
527,670 14,760 X 14,760
TUBOS DE ACERO DE MEX COMMON 898592506 1,172,500 70,000 X 70,000
TUMBLEWEED COMMUNICATIONS CP COMMON 899690101 18,558,900 363,900 X 363,900
5,467,149 107,199 X 107,199
TURNSTONE SYSTEMS INC COMMON 900423104 15,136,800 326,400 X 326,400
343,546 7,408 X 7,408
565,775 12,200 X 12,200
TUT SYSTEMS INC COMMON 901103101 109,013 1,263 X 1,263
TYCO INTL LTD NEW COMMON 902124106 41,509,753 800,188 X 800,188
1,279,497 24,665 X 24,665
2,126,875 41,000 X 41,000
UST INC COMMON 902911106 9,150 400 X 400
US UNWIRED INC CL -A COMMON 90338R104 5,832,172 611,900 X 611,900
1,830,667 192,070 X 192,070
UNILEVER N V COMMON 904784709 25,814 535 X 535
UNICOM CORP COMMON 904911104 80,558,828 1,433,750 X 1,433,750
Total 216,290,810
<PAGE>
9/30/2000 FORM 13F J. & W. SELIGMAN & CO. INCORPORATED Page 35
ITEM 1: ITEM 2: ITEM 3: ITEM 4: ITEM 5: ITEM 6: ITEM 7: ITEM 8:
SHARES OR INVST DISCRET V O T I N G A U T H O R I T Y
TITLE CUSIP FAIR MARKET PRINCIPAL SOLE OTHR (S H A R E S)
NAME OF ISSUER OF CLASS NUMBER VALUE AMOUNT SHRD MGRS (A)SOLE (B)SHARED (C)NONE
UNION CARBIDE CORP COMMON 905581104 966,400 25,600 X 25,600
UNION PAC RES GROUP INC COMMON 907834105 13,425 600 X 600
UNITED TECHNOLOGIES CORP COMMON 913017109 230,668,288 3,330,950 X 3,330,950
21,222,701 306,465 X 306,465
UNITED THERAPEUTICS CORP COMMON 91307C102 23,329,125 267,000 X 267,000
6,503,234 74,429 X 74,429
UNITEDGLOBALCOM INC COMMON 913247508 312,000 10,400 X 10,400
895,500 29,850 X 29,850
2,917,650 97,255 X 97,255
UNITEDHEALTH GROUP COMMON 91324P102 128,811,969 1,304,425 X 1,304,425
21,652,419 219,265 X 219,265
UNIVERSAL HLTH SVCS INC COMMON 913903100 3,647,625 42,600 X 42,600
633,625 7,400 X 7,400
UNUMPROVIDENT CORP COMMON 91529Y106 79,792,905 2,928,180 X 2,928,180
12,242,063 449,250 X 449,250
URBAN OUTFITTERS INC COMMON 917047102 3,944,160 380,160 X 380,160
202,209 19,490 X 19,490
VALERO ENERGY CORP NEW COMMON 91913Y100 8,489,864 241,275 X 241,275
493,681 14,030 X 14,030
VARIAN SEMICONDUCTOR EQUIP COMMON 922207105 1,685 45 X 45
VEECO INSTRS INC DEL COMMON 922417100 200,552,989 1,887,280 X 1,887,280
VENTIV HEALTH INC COMMON 922793104 X
X
X
VERITAS SOFTWARE CO COMMON 923436109 18,787,736 132,308 X 132,308
640,065 4,508 X 4,508
1,210,550 8,525 X 8,525
VERISIGN COMMON 92343E102 81,204,268 400,885 X 400,885
1,162,304 5,738 X 5,738
2,511,775 12,400 X 12,400
VERIZON COMMUNICATIONS COMMON 92343V104 59,170,911 1,221,593 X 1,221,593
147,298 3,041 X 3,041
VIACOM INC COMMON 925524308 99,450 1,700 X 1,700
Total 912,227,871
<PAGE>
9/30/2000 FORM 13F J. & W. SELIGMAN & CO. INCORPORATED Page 36
ITEM 1: ITEM 2: ITEM 3: ITEM 4: ITEM 5: ITEM 6: ITEM 7: ITEM 8:
SHARES OR INVST DISCRET V O T I N G A U T H O R I T Y
TITLE CUSIP FAIR MARKET PRINCIPAL SOLE OTHR (S H A R E S)
NAME OF ISSUER OF CLASS NUMBER VALUE AMOUNT SHRD MGRS (A)SOLE (B)SHARED (C)NONE
VIATEL INC COMMON 925529208 82 8 X 8
VIGNETTE CORPORATION COMMON 926734104 31,228,338 1,045,300 X 1,045,300
VISHAY INTERTECHNOLOGY INC COMMON 928298108 167,365,485 5,442,780 X 5,442,780
VISTEON CORP COMMON 92839U107 X
VITESSE SEMICONDUCTOR CORP COMMON 928497106 137,654,350 1,547,765 X 1,547,765
606,554 6,820 X 6,820
1,338,509 15,050 X 15,050
VITRIA TECHNOLOGY INC COMMON 92849Q104 14,108,725 302,600 X 302,600
VIVENDI (EX-GEN EAUX) SP ADR COMMON 92851S105 149,977 10,125 X 10,125
708,008 47,798 X 47,798
VODAFONE GROUP PLC COMMON 92857W100 13,301,093 359,489 X 359,489
629,740 17,020 X 17,020
WPP GROUP PLC COMMON 929309300 81,851 1,380 X 1,380
401,605 6,771 X 6,771
WAL MART STORES INC COMMON 931142103 87,472,241 1,817,605 X 1,817,605
1,023,763 21,273 X 21,273
1,407,656 29,250 X 29,250
WAL-MART DE MEXICO SA -SP ADR COMMON 93114W107 939,392 44,900 X 44,900
WASHINGTON MUT INC COMMON 939322103 118,124,484 2,967,020 X 2,967,020
20,843,357 523,538 X 523,538
WASTE CONECTIONS INC COMMON 941053100 407,438 15,900 X 15,900
31,256,606 1,219,770 X 1,219,770
12,722,172 496,475 X 496,475
WATCHGUARD TECHNOLOGIES INC COMMON 941105108 21,138,000 352,300 X 352,300
5,907,540 98,459 X 98,459
WATERS CORP COMMON 941848103 15,557,200 174,800 X 174,800
10,680 120 X 120
WATSON PHARMACEUTICALS INC COMMON 942683103 661,725 10,200 X 10,200
75,833,685 1,168,920 X 1,168,920
7,054,508 108,740 X 108,740
1,699,725 26,200 X 26,200
WELLS FARGO CO COMMON 949746101 3,087,000 67,200 X 67,200
Total 772,721,487
<PAGE>
9/30/2000 FORM 13F J. & W. SELIGMAN & CO. INCORPORATED Page 37
ITEM 1: ITEM 2: ITEM 3: ITEM 4: ITEM 5: ITEM 6: ITEM 7: ITEM 8:
SHARES OR INVST DISCRET V O T I N G A U T H O R I T Y
TITLE CUSIP FAIR MARKET PRINCIPAL SOLE OTHR (S H A R E S)
NAME OF ISSUER OF CLASS NUMBER VALUE AMOUNT SHRD MGRS (A)SOLE (B)SHARED (C)NONE
WEST TELESERVICES CORP COMMON 956188106 14,093,200 640,600 X 640,600
4,172,740 189,670 X 189,670
WESTELL TECHNOLOGIES INC COMMON 957541105 3,565,088 276,900 X 276,900
1,062,896 82,555 X 82,555
WESTERN DIGITAL CORP COMMON 958102105 8,642,125 1,471,000 X 1,471,000
WESTERN WIRELESS CORP COMMON 95988E204 61,944,750 1,738,800 X 1,738,800
18,683,959 524,462 X 524,462
WET SEAL INC COMMON 961840105 5,406,556 344,641 X 344,641
383,795 24,465 X 24,465
WILLIAMS COS INC DEL COMMON 969457100 136,563,619 3,232,275 X 3,232,275
1,144,553 27,090 X 27,090
2,256,150 53,400 X 53,400
WILLIAMS-SONOMA INC COMMON 969904101 413,525 11,900 X 11,900
1,194,531 34,375 X 34,375
3,864,548 111,210 X 111,210
WIND RIVER SYSTEMS INC COMMON 973149107 15,737,881 328,300 X 328,300
WORLD ACCESS INC COMMON 98141A101 530,705 98,165 X 98,165
2,973 550 X 550
WORLDCOM INC COMMON 98157D106 74,654,004 2,457,745 X 2,457,745
685,564 22,570 X 22,570
1,309,163 43,100 X 43,100
XILINX INC COMMON 983919101 34,669,563 404,900 X 404,900
659,313 7,700 X 7,700
1,220,156 14,250 X 14,250
XIRCOM INC COMMON 983922105 82,291,896 3,259,085 X 3,259,085
XEROX CORP COMMON 984121103 7,772 516 X 516
18,527 1,230 X 1,230
YAHOO INC COMMON 984332106 109,200 1,200 X 1,200
YUPI INTERNET INC SER C COMMON 988996997 7,000,004 608,696 X 608,696
ZIFF DAVIS INC - ZDNET COMMON 989511209 17,334,844 1,232,700 X 1,232,700
BAYERISCHE MOTOREN WERKE AG COMMON D12096125 127,238 3,770 X 3,770
640,913 18,990 X 18,990
Total 500,391,747
<PAGE>
9/30/2000 FORM 13F J. & W. SELIGMAN & CO. INCORPORATED Page 38
ITEM 1: ITEM 2: ITEM 3: ITEM 4: ITEM 5: ITEM 6: ITEM 7: ITEM 8:
SHARES OR INVST DISCRET V O T I N G A U T H O R I T Y
TITLE CUSIP FAIR MARKET PRINCIPAL SOLE OTHR (S H A R E S)
NAME OF ISSUER OF CLASS NUMBER VALUE AMOUNT SHRD MGRS (A)SOLE (B)SHARED (C)NONE
ACE LTD COMMON G0070K103 576,975 14,700 X 14,700
29,276,183 745,890 X 745,890
5,390,399 137,335 X 137,335
AMDOCS LTD COMMON G02602103 58,976,810 945,520 X 945,520
CHINADOTCOM CORP - CL A COMMON G2108N109 692,250 52,000 X 52,000
FRESH DEL MONTE PRODUCE INC COMMON G36738105 5,251,280 800,195 X 800,195
252,591 38,490 X 38,490
GLOBAL CROSSING LTD COMMON G3921A100 2,325,000 75,000 X 75,000
GLOBAL CROSSING CONVERTIBLE PFD 7CONVERT G3921A142 9,506,988 49,100 X 49,100
188,784 975 X 975
RENAISSANCE RE HLDGS LTD COMMON G7496G103 11,361,950 177,704 X 177,704
921,659 14,415 X 14,415
HILFIGER TOMMY CORP COMMON G8915Z102 8,663 900 X 900
TRANSOCEAN SEDCO FOREX INC COMMON G90078109 310,713 5,300 X 5,300
877,792 14,973 X 14,973
2,878,488 49,100 X 49,100
XL CAPITAL LTD - CLASS A COMMON G98255105 77,138,250 1,049,500 X 1,049,500
18,743 255 X 255
UBS AG-REG COMMON H8920G155 99,548 735 X 735
455,756 3,365 X 3,365
SBS BROADCASTING SA COMMON L8137F102 218,969 5,500 X 5,500
718,616 18,050 X 18,050
2,058,704 51,710 X 51,710
ALADDIN KNOWLEDGE SYSTEMS COMMON M0392N101 72,500 10,000 X 10,000
AUDIOCODES LTD COMMON M15342104 1,745,063 20,500 X 20,500
CHECK POINT SOFTWARE TECH LTD COMMON M22465104 174,478,500 1,107,800 X 1,107,800
E-SIMS LTD COMMON M40990109 516,269 73,100 X 73,100
GALILEO TECHNOLOGY LTD COMMON M47298100 263,525 8,300 X 8,300
12,521,565 394,380 X 394,380
2,412,524 75,985 X 75,985
GILAT SATELLITE NETWORKS LTD COMMON M51474100 62,704,247 815,665 X 815,665
Total 464,219,299
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9/30/2000 FORM 13F J. & W. SELIGMAN & CO. INCORPORATED Page 39
ITEM 1: ITEM 2: ITEM 3: ITEM 4: ITEM 5: ITEM 6: ITEM 7: ITEM 8:
SHARES OR INVST DISCRET V O T I N G A U T H O R I T Y
TITLE CUSIP FAIR MARKET PRINCIPAL SOLE OTHR (S H A R E S)
NAME OF ISSUER OF CLASS NUMBER VALUE AMOUNT SHRD MGRS (A)SOLE (B)SHARED (C)NONE
M- SYSTEMS FLASH DISK PIONEER COMMON M7061C100 1,580,963 41,400 X 41,400
NOVA MEASURING INSTRUMENTS COMMON M7516K103 4,000,000 400,000 X 400,000
ORBOTECH LTD COMMON M75253100 221,372,813 4,047,960 X 4,047,960
RADVISION LTD COMMON M81869105 2,305,738 81,800 X 81,800
TTI TEAM TELECOM INTL LTD COMMON M88258104 745,725 36,600 X 36,600
ASM LITHOGRAPHY HOLDING NV ADR COMMON N07059111 131,673 4,075 X 4,075
642,857 19,895 X 19,895
MADGE NETWORKS N.V. COMMON N5424G106 40 10 X 10
AL-AHRAM BEVERAGES CO -GDR COMMON US0102032 581,816 32,800 X 32,800
GRUPO TELEVISA SA-SPONS COMMON US40049J2 1,084,525 18,800 X 18,800
HON HAI PRECISION INDUSTRY CO. COMMON US4380902 10,042,119 763,750 X 763,750
PLIVA D.D. - GDR REG S COMMON US72917Q2 438,575 40,650 X 40,650
TELEKOMUNIKACJA POLSKA- COMMON US87943D2 347,288 64,800 X 64,800
UNIAO DE BANCOS BRASILIEROS COMMON US90458E1 1,042,800 31,600 X 31,600
OTP BANK COMMON USX607461 1,066,859 20,700 X 20,700
LARSEN & TOUBRO LTD. COMMON USY5217N1 519,064 72,100 X 72,100
YAGEO CORPORATION COMMON USY9723R1 192,630 48,489 X 48,489
ASE TEST LIMITED COMMON Y02516105 40,315,800 1,919,800 X 1,919,800
CREATIVE TECHNOLOGY LTD COMMON Y1775U107 180,201,300 8,684,400 X 8,684,400
Total 466,612,583
Grand Total 27,254,092,855
Total Number of Securities 679
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