SENECA CAPITAL ADVISORS LLC
13F-HR, 2000-02-14
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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM 13F

                               FORM 13f Cover Page


          Report for the Calendar Year or Quarter Ended December 31, 1999



                          Seneca Capital Advisors LLC
- --------------------------------------------------------------------------------
Name of Institutional Investment Manager

     527 Madison Avenue, 11th Floor     New York        New York           10022
- --------------------------------------------------------------------------------
Business Address         (Street)       (City)            (State)          (Zip)


13F File Number: 28-_____________

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, and tables, are considered integral parts of this form.


Name, Title and Telephone Number of Person Submitting Report:


Doug Hirsch                       Manager                       (212) 371-1300
- --------------------------------------------------------------------------------
Name                               (Title)                            (Phone)


Signature, Place and Date of Signing:


/s/ Doug Hirsch
- ------------------------------------
527 Madison Avenue, 11th Floor
New York, New York 10022
02/14/00


Report Type:

[X]      13F HOLDINGS REPORT.

[ ]      13F NOTICE.

[ ]      13F COMBINATION REPORT.
<PAGE>

                             Form 13F SUMMARY PAGE


Number of Other Included Managers:    One (1)
                                  ---------------
List of Other Included Managers:

         Seneca Capital Investments, LLC
         -------------------------------
Form 13F Information Table Entry Total: 137
                                       -----
Form 13F Information Table Value Total: $435,193,000
                                       --------------



<PAGE>
                UNITED STATES SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                    FORM 13F
                                INFORMATION TABLE

                          SENECA CAPITAL ADVISORS LLC

                           FORM 13F INFORMATION TABLE
                              AS OF DATE: 12/31/99

<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------------------------------------------------
ITEM 1                              ITEM 2       ITEM 3     ITEM 4     ITEM 5         ITEM 6    ITEM 7              ITEM 8
                                                            VALUE   SHARES/ SH/ PUT/ INVSTMT    OTHER          VOTING AUTHORITY
  NAME OF ISSUER               TITLE OF CLASS    CUSIP    (x$1000)  PRN AMT PRN CALL DSCRETN   MANAGERS     SOLE    SHARED    NONE
- ------------------------------ ---------------- --------- -------- -------- --- ---- ------- ------------ -------- -------- --------
<S>                                <C>         <C>         <C>      <C>         <C>    <C>      <C>     <C>    <C>    <C>     <C>
Aegon N.V.American                    ORD       007924103     912    12,495 SH         12,495             12,495
Allstate Corp.                        COM       020002101    3877   161,562 SH        161,562            161,562
Allstate Corp.                        COM       020002101     466    19,436 SH         19,436     1       19,436
Applied Power Inc.                    COM       038225108    1632    44,400 SH  CLA    44,400             44,400
Applied Power Inc.                    COM       038225108    3098    84,300 SH  CLA    84,300     1       84,300
At Home Corp.                         COM       045919107    4096    95,400 SH  SERA   95,400             95,400
At Home Corp.                         COM       045919107     481    11,200 SH  SERA   11,200     1       11,200
AT&T Canada Inc.                      COM       00207Q202   12214   304,400 SH  CLB   304,400            304,400
AT&T Canada Inc.                      COM       00207Q202    5096   127,000 SH  CLB   127,000     1      127,000
AT&T Canada Inc.                      COM       00207Q202    7044   175,000 SH  CALL  175,000     1      175,000
AT&T Corp.                            COM       001957109    4309    84,900 SH         84,900             84,900
AT&T Corp.                            COM       001957109     502     9,900 SH          9,900     1        9,900
Baker Hughes, Inc.                    COM       057224107     276    13,100 SH         13,100     1       13,100
Bard (C.R.) Inc.                      COM       067383109    1935    36,500 SH         36,500             36,500
Bard (C.R.) Inc.                      COM       067383109    3705    69,900 SH         69,000     1       69,900
Bard (C.R.) Inc.                      COM       067383109     912    17,200 SH  CALL   17,200             17,200
Bard (C.R.) Inc.                      COM       067383109    1738    32,800 SH  CALL   32,800     1       32,800
BCE Inc.                              COM       005534109   13699   151,900 SH        151,900            151,900
BCE Inc.                              COM       005534109    1641    18,200 SH         18,200     1       18,200
Bethlehem Steel                       COM       087509105     749    89,400 SH         89,400             89,400
Bethlehem Steel                       COM       087509105    1429   170,600 SH        170,600     1      170,600
Boise Cascade Office Products Corp.   COM       097403109    1293    86,200 SH         86,200             86,200
Boise Cascade Office Products Corp.   COM       097403109    2457   163,800 SH        163,800     1      163,800
BP Amoco PLC                          ADR       055622104   11601   195,586 SH        195,586            195,586
BP Amoco PLC                          ADR       055622104    1742    29,376 SH         29,376     1       29,376
Cadence Design Sys. Inc.              COM       127387108    1809    75,382 SH         75,382             75,382
Cadence Design Sys. Inc.              COM       127387108     226     9,406 SH          9,406     1        9,406
Capital Re Corp.                      COM       140432105     490    34,300 SH         34,300             34,300
Capital Re Corp.                      COM       140432105     956    66,900 SH         66,900     1       66,900
C-Cube Microsystems Inc.              COM       125015107    4675    74,800 SH         74,800             74,800
C-Cube Microsystems Inc.              COM       125015107    8888   142,200 SH        142,200     1      142,200
C-Cube Microsystems Inc.              COM       125015907    3175    50,800 SH  CALL   50,800             50,800
C-Cube Microsystems Inc.              COM       125015907    6044    96,700 SH  CALL   96,700     1       96,700
Champps Entertainment Inc.            COM       158787101     651   189,500 SH        189,500            189,500
Champps Entertainment Inc.            COM       158787101    1866   542,700 SH        542,700     1      542,700
Clorox Company                        COM       189054109    2627    52,140 SH         52,140             52,140
Clorox Company                        COM       189054109     322     6,400 SH          6,400     1        6,400
Columbus McKinnon                     COM       199333105    1279   127,900 SH        127,900            127,900
Columbus McKinnon                     COM       199333105    1251   125,100 SH        125,100     1      125,100
Comdisco Inc.                         COM      0200336105    4474   120,100 SH        120,100            120,100
Comdisco Inc.                         COM      0200336105     536    14,400 SH         14,400     1       14,400
Comdisco Inc.                         COM      0200336905    5439   146,000 SH  CALL  146,000            146,000
Comdisco Inc.                         COM      0200336905   10538   282,900 SH  CALL  282,900     1      282,900
Corecomm Limited                      ORD        G2422109    3689    94,900 SH  WNTS   94,900             94,900
Corecomm Limited                      ORD       G2422R109    7001   180,100 SH  WNTS  180,100     1      180,100
Creative Computers Inc.               COM       22527E109     113    15,500 SH         15,500             15,500
Creative Computers Inc.               COM       22527E109     216    29,600 SH         29,600     1       29,600
Esat Telecom Group                    ADR       26883Y102    6057    66,200 SH         66,200             66,200
Esat Telecom Group                    ADR       26883Y102   11529   126,000 SH        126,000     1      126,000
Global Crossing Ltd.                  COM       G3921A100    1126    22,550 SH         22,550     1       22,550
Global Crossing Ltd.                  COM       G3921A100    9510   190,445 SH        190,445            190,445
Global Light Telecom Inc.             COM       379345100    4647   375,500 SH        375,500            375,500
Global Light Telecom Inc.             COM       379345100    8812   712,100 SH        712,100     1      712,100
Goodrich (B.F.) Co.                   COM       382388106    2384    86,700 SH  CALL   86,700             86,700
Goodrich (B.F.) Co.                   COM       382388106     283    10,300 SH  CALL   10,300     1       10,300
Grand Union Co.                       COM       386532402     638    63,000 SH         63,000             63,000
Grand Union Co.                       COM       386532402    1089   107,600 SH        107,600     1      107,600
Hilton Hotel Corp.                    COM       432848109     460    47,802 SH         47,802             47,802
Howmet International Inc.             COM       443208103    1245    68,900 SH         68,900             68,900
Howmet International Inc.             COM       443208103    2368   131,000 SH        131,000     1      131,000
International Paper                   COM       460146103   17637   312,500 SH        312,500            312,500
International Paper                   COM       460146103    2116    37,500 SH         37,500     1       37,500
Jones Intercable Inc.                 COM       480206101    6536    95,500 SH         95,500             95,500
Jones Intercable Inc.                 COM       480206101     780    11,400 SH         11,400     1       11,400
Juno Lighting Inc.                    COM       482047107     890    84,756 SH         84,756             84,756
Juno Lighting Inc.                    COM       482047107    1617   154,004 SH        154,004     1      154,004
Level 8 Systems Inc.                  COM       52729M102     560    16,200 SH         16,200             16,200
Level 8 Systems, Inc.                 PFD       52729M102    4016    11,620 SH         11,620             11,620
Level 8 Systems, Inc.                 PFD       52729M102     897     2,596 SH          2,596     1        2,596
Level 8 Systems, Inc.                 COM       52729M102    2853   116,150 SH  WNTS  116,150            116,150
Level 8 Systems, Inc.                 COM       52729M102     341    13,890 SH  WNTS   13,890     1       13,890
Lucent Technologies Inc.              COM       549463107   14393   192,390 SH        192,390            192,390
Lucent Technologies Inc.              COM       549463107    1703    22,770 SH         22,770     1       22,770
Marvel Enterprises Inc.               COM       57383M108    1019   185,200 SH        185,200            185,200
Marvel Enterprises Inc.               COM       57383M108    1723   313,300 SH        313,300     1      313,300
Mediware Information Systems          COM       584946107     503    64,900 SH         64,900             64,900
Mediware Information Systems          COM       584946107     970   125,100 SH        125,100     1      125,100
Medtronic Inc.                        COM       585055106    7360   202,000 SH        202,000            202,000
Medtronic Inc.                        COM       585055106     853    23,400 SH         23,400     1       23,400
Meristar Hotels and Resorts           COM       589988104     863   242,200 SH        242,200            242,200
Meristar Hotels and Resorts           COM       589988104    1615   453,400 SH        453,400     1      453,400
Methode Electronics                   COM       591520200     970    30,300 SH         30,300             30,300
Methode Electronics                   COM       591520200    1830    57,200 SH         57,200     1       57,200
MRV Communications                    COM       553477100     326     5,200 SH          5,200              5,200
MRV Communications                    COM       553477100     621     9,900 SH          9,900     1        9,900
MRV Communications Inc.               COM       553477100     326     5,200 SH  CALL    5,200              5,200
MRV Communications Inc.               COM       553477100     615     9,800 SH  CALL    9,800     1        9,800
Navigant International                COM       63935P202    5097   436,100 SH        436,100            436,100
Navigant International                COM       63935P202    9629   823,900 SH        823,900     1      823,900
Newbridge Networks Corp.              COM       650901101    2491   110,400 SH  CALL  110,400            110,400
Newbridge Networks Corp.              COM       650901101    4729   209,600 SH  CALL  209,600     1      209,600
Nortel Networks Corp.                 COM       656569100    8223    81,416 SH         81,416     1       81,416
Nortel Networks Corp.                 COM       656569100    4808    47,600 SH   PUT   47,600             47,600
Nortel Networks Corp.                 COM       656569100    9110    90,200 SH   PUT   90,200     1       90,200
Olsten Corp.                          COM       681385105    6740   595,800 SH        595,800            595,800
Olsten Corp.                          COM       681385105   12774 1,129,200 SH       1,129,200    1    1,129,200
Olsten Corp.                          COM       681385105     594    52,500 SH  CALL   52,500             52,500
Olsten Corp.                          COM       681385105    1137   100,500 SH  CALL  100,500     1      100,500
Optical Coating Laboratories          COM       683829105    2025     6,900 SH          6,900              6,900
Optical Coating Laboratories          COM       683829105    3845    13,100 SH         13,100     1       13,100
Rambus Inc.                           COM       750917106     510     6,000 SH          6,000              6,000
Rambus Inc.                           COM       750917106     978    11,500 SH         11,500     1       11,500
Saga Systems Inc.                     COM       786610105     508    25,500 SH         25,500             25,500
Saga Systems Inc.                     COM       786610105     987    49,500 SH         49,500     1       49,500
Shorewood Packaging Corp.             COM       825229107     752    39,700 SH         39,700             39,700
Shorewood Packaging Corp.             COM       825229107    1424    75,200 SH         75,200     1       75,200
Silicorp LTD                          COM       M84116108      32    25,778 SH  WNTS   25,778             25,778
Silicorp LTD                          COM       M84116108      62    49,222 SH  WNTS   49,222     1       49,222
Smed International Inc.               COM      83169D0104     215    15,200 SH         15,200             15,200
Smed International Inc.               COM      83169D0104     412    29,100 SH         29,100     1       29,100
Starwood Hotels & Resots              COM       85590A203    1196    50,900 SH  CALL   50,900             50,900
Starwood Hotels & Resots              COM       85590A203    2296    97,700 SH  CALL   97,700     1       97,700
Styling Technology Corp               COM       863905105      58    28,800 SH         28,800             28,800
Styling Technology Corp               COM       863905105     111    55,600 SH         55,600     1       55,600
Teledyne Technologies Inc.            COM       879360105     976   103,400 SH        103,400            103,400
Teledyne Technologies Inc.            COM       879360105    1855   196,600 SH        196,600     1      196,600
Telxon Corp.                          COM       879700102     912    57,000 SH         57,000             57,000
Telxon Corp.                          COM       879700102    1731   108,200 SH        108,200     1      108,200
Template Software Inc.                COM       879788107     472    34,200 SH         34,200             34,200
Template Software Inc.                COM       879788107     909    65,800 SH         65,800     1       65,800
Transworld Entertainment              COM       89336Q100    1993   192,070 SH        192,070            192,070
Transworld Entertainment              COM       89336Q100    2628   253,290 SH        253,290     1      253,290
Trigen Energy Corp.                   COM       895930105    1086    62,500 SH         62,500             62,500
Trigen Energy Corp.                   COM       895930105    2090   120,300 SH        120,300     1      120,300
TSI Inc/Minnesota                     COM       872885108     334    29,000 SH         29,000              2,900
TSI Inc/Minnesota                     COM       872885108     633    55,000 SH         55,000     1       55,000
TYCO International LTD.               COM       902124106   23095   592,184 SH        592,184            592,184
TYCO International LTD.               COM       902124106    2242    57,486 SH         57,486     1       57,486
UICI                                  COM       902737105    1034    97,900 SH         97,900             97,900
UICI                                  COM       902737105    1964   185,900 SH        185,900     1      185,900
Vodafone Group PlC                    ADR       92857F107   17746   358,500 SH        358,500            358,500
Vodafone Group PlC                    ADR       92857F107    2116    42,750 SH         42,750     1       42,750
WHX Corp.                             COM       929248102     327    36,300 SH         36,300             36,300
WHX Corp.                             COM       929248102     619    68,800 SH         68,800     1       68,800
Workflow Management Inc.              COM       98137N109    4797   169,800 SH        169,800            169,800
Workflow Management Inc.              COM       98137N109    6760   239,300 SH        239,300     1      239,300
Wyndham International                 COM       983101106     303   103,300 SH        103,300            103,300
Wyndham International                 COM       983101106     578   196,700 SH        196,700     1      196,700

</TABLE>



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