SYBASE INC
SC 13G/A, 1999-02-12
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                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  SCHEDULE 13G
                                 (Rule 13d-102)

             INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT
           TO RULES 13d-1(b)(c), AND (d) AND AMENDMENTS THERETO FILED
                            PURSUANT TO RULE 13d-2(b)

                               (Amendment No. 1)*

                                  SYBASE, INC.
                              --------------------
                                (Name of Issuer)

                          Common Stock, $.001 Par Value
                    ---------------------------------------
                         (Title of Class of Securities)

                                    871130100
                                 --------------
                                 (CUSIP Number)

                                December 31, 1998
                     ---------------------------------------
                      (Date of Event which Requires Filing
                               of this Statement)

Check the  appropriate box to designate the rule pursuant to which this Schedule
is filed:

                  [ ]     Rule 13d-1(b)
                  [X]     Rule 13d-1(c)
                  [ ]     Rule 13d-1(d)


*The  remainder of this cover page shall be filled out for a reporting  person's
initial filing on this form with respect to the subject class of securities, and
for  any  subsequent   amendment   containing   information  which  would  alter
disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the  Securities  Exchange  Act of
1934 or  otherwise  subject to the  liabilities  of that  section of the Act but
shall be subject to all other provisions of the Act (however, see the Notes).






                         Continued on following page(s)
                               Page 1 of 30 Pages
                             Exhibit Index: Page 27


<PAGE>


                                  SCHEDULE 13G

CUSIP No. 871130100                                           Page 2 of 30 Pages


1        Name of Reporting Person
         I.R.S. Identification No. of Above Persons (ENTITIES ONLY)

                  QUANTUM INDUSTRIAL PARTNERS LDC

2        Check the Appropriate Box If a Member of a Group*
                                                     a.  [ ]
                                                     b.  [x]
3        SEC Use Only

4        Citizenship or Place of Organization

                  CAYMAN ISLANDS

                           5        Sole Voting Power
 Number of                                  0
   Shares
Beneficially               6        Shared Voting Power
  Owned By                                  317,600
    Each
  Reporting                7        Sole Dispositive Power
   Person                                   0
    With
                           8        Shared Dispositive Power
                                            317,600

9        Aggregate Amount Beneficially Owned by Each Reporting Person

                                            317,600/1/

10       Check Box If the Aggregate Amount in Row (9) Excludes Certain
         Shares*
                                            [x]

11       Percent of Class Represented By Amount in Row (9)

                                    .39%

12       Type of Reporting Person*

                  OO; IV

                     * SEE INSTRUCTIONS BEFORE FILLING OUT!

_______________
/1/ Position as of February 11, 1999.



<PAGE>


                                  SCHEDULE 13G

CUSIP No. 871130100                                           Page 3 of 30 Pages


1        Name of Reporting Person
         I.R.S. Identification No. of Above Persons (ENTITIES ONLY)

                  QIH MANAGEMENT INVESTOR, L.P.

2        Check the Appropriate Box If a Member of a Group*
                                                     a.  [ ]
                                                     b.  [x]
3        SEC Use Only

4        Citizenship or Place of Organization

                  DELAWARE

                           5        Sole Voting Power
 Number of                                  0
   Shares
Beneficially               6        Shared Voting Power
  Owned By                                  317,600
    Each
  Reporting                7        Sole Dispositive Power
   Person                                   0
    With
                           8        Shared Dispositive Power
                                            317,600

9        Aggregate Amount Beneficially Owned by Each Reporting Person

                                            317,600/1/

10       Check Box If the Aggregate Amount in Row (9) Excludes Certain
         Shares*
                                            [x]

11       Percent of Class Represented By Amount in Row (9)

                                    .39%

12       Type of Reporting Person*

                  PN; IA


                     * SEE INSTRUCTIONS BEFORE FILLING OUT!

_______________
/1/ Position as of February 11, 1999.

<PAGE>


                                  SCHEDULE 13G

CUSIP No. 871130100                                           Page 4 of 30 Pages


1        Name of Reporting Person
         I.R.S. Identification No. of Above Persons (ENTITIES ONLY)

                  QIH MANAGEMENT, INC.

2        Check the Appropriate Box If a Member of a Group*
                                                     a.  [ ]
                                                     b.  [x]
3        SEC Use Only

4        Citizenship or Place of Organization

                  DELAWARE

                           5        Sole Voting Power
 Number of                                  0
   Shares
Beneficially               6        Shared Voting Power
  Owned By                                  317,600
    Each
  Reporting                7        Sole Dispositive Power
   Person                                   0
    With
                           8        Shared Dispositive Power
                                            317,600

9        Aggregate Amount Beneficially Owned by Each Reporting Person

                                            317,600/1/

10       Check Box If the Aggregate Amount in Row (9) Excludes Certain
         Shares*
                                            [x]

11       Percent of Class Represented By Amount in Row (9)

                                    .39%

12       Type of Reporting Person*

                  CO

                     * SEE INSTRUCTIONS BEFORE FILLING OUT!

_______________
/1/ Position as of February 11, 1999.


<PAGE>


                                  SCHEDULE 13G

CUSIP No. 871130100                                           Page 5 of 30 Pages


1        Name of Reporting Person
         I.R.S. Identification No. of Above Persons (ENTITIES ONLY)

                  SOROS FUND MANAGEMENT LLC

2        Check the Appropriate Box If a Member of a Group*
                                                     a.  [ ]
                                                     b.  [x]
3        SEC Use Only

4        Citizenship or Place of Organization

                  DELAWARE

                           5        Sole Voting Power
 Number of                                  672,200
   Shares
Beneficially               6        Shared Voting Power
  Owned By                                  317,600
    Each
  Reporting                7        Sole Dispositive Power
   Person                                   672,200
    With
                           8        Shared Dispositive Power
                                            317,600

9        Aggregate Amount Beneficially Owned by Each Reporting Person

                                            989,800/1/

10       Check Box If the Aggregate Amount in Row (9) Excludes Certain
         Shares*
                                            [x]

11       Percent of Class Represented By Amount in Row (9)

                                    1.21%

12       Type of Reporting Person*

                  OO; IA

                     * SEE INSTRUCTIONS BEFORE FILLING OUT!

_______________
/1/ Position as of February 11, 1999.

<PAGE>


                                  SCHEDULE 13G

CUSIP No. 871130100                                           Page 6 of 30 Pages



1        Name of Reporting Person
         I.R.S. Identification No. of Above Persons (ENTITIES ONLY)

                  GEORGE SOROS (in the capacity described herein)

2        Check the Appropriate Box If a Member of a Group*
                                                     a.  [ ]
                                                     b.  [x]
3        SEC Use Only

4        Citizenship or Place of Organization

                  UNITED STATES

                           5        Sole Voting Power
 Number of                                  682,400
   Shares
Beneficially               6        Shared Voting Power
  Owned By                                  989,800
    Each
  Reporting                7        Sole Dispositive Power
   Person                                   682,400
    With
                           8        Shared Dispositive Power
                                            989,800

9        Aggregate Amount Beneficially Owned by Each Reporting Person

                                            1,672,200/1/

10       Check Box If the Aggregate Amount in Row (9) Excludes Certain Shares*
                                            [x]

11       Percent of Class Represented By Amount in Row (9)

                                    2.05%

12       Type of Reporting Person*

                  IA; IN

                     * SEE INSTRUCTIONS BEFORE FILLING OUT!

_______________
/1/ Position as of February 11, 1999.


<PAGE>


                                  SCHEDULE 13G

CUSIP No. 871130100                                           Page 7 of 30 Pages



1        Name of Reporting Person
         I.R.S. Identification No. of Above Persons (ENTITIES ONLY)

                  STANLEY F. DRUCKENMILLER (in the capacity described herein)

2        Check the Appropriate Box If a Member of a Group*
                                                     a.  [ ]
                                                     b.  [x]
3        SEC Use Only

4        Citizenship or Place of Organization

                  UNITED STATES

                           5        Sole Voting Power
 Number of                                  0
   Shares
Beneficially               6        Shared Voting Power
  Owned By                                  989,800
    Each
  Reporting                7        Sole Dispositive Power
   Person                                   0
    With
                           8        Shared Dispositive Power
                                            989,800

9        Aggregate Amount Beneficially Owned by Each Reporting Person

                                            989,800/1/

10       Check Box If the Aggregate Amount in Row (9) Excludes Certain Shares*
                                                           [X]
11       Percent of Class Represented By Amount in Row (9)

                                    1.21%

12       Type of Reporting Person*

                  IA

                     * SEE INSTRUCTIONS BEFORE FILLING OUT!

_______________
/1/ Position as of February 11, 1999.


<PAGE>


                                  SCHEDULE 13G

CUSIP No. 871130100                                           Page 8 of 30 Pages


1        Name of Reporting Person
         S.S. or I.R.S. Identification No. of Above Person (ENTITIES ONLY)

                  WINSTON PARTNERS, L.P.

2        Check the Appropriate Box If a Member of a Group*
                                                     a.  [ ]
                                                     b.  [x]

3        SEC Use Only

4        Citizenship or Place of Organization

                  DELAWARE

                           5        Sole Voting Power
 Number of                                  465,000
   Shares
Beneficially               6        Shared Voting Power
  Owned By                                  0
    Each
  Reporting                7        Sole Dispositive Power
   Person                                   465,000
    With
                           8        Shared Dispositive Power
                                            0

9        Aggregate Amount Beneficially Owned by Each Reporting Person

                                            465,000/1/

10       Check Box If the Aggregate Amount in Row (9) Excludes Certain Shares*
                                            [x]

11       Percent of Class Represented By Amount in Row (9)

                                    .57%

12       Type of Reporting Person*

                  PN

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!

_______________
/1/ Position as of February 11, 1999.


<PAGE>


                                  SCHEDULE 13G

CUSIP No. 871130100                                           Page 9 of 30 Pages


1        Name of Reporting Person
         S.S. or I.R.S. Identification No. of Above Person (ENTITIES ONLY)

                  CHATTERJEE FUND MANAGEMENT, L.P.

2        Check the Appropriate Box If a Member of a Group*
                                                     a.  [ ]
                                                     b.  [x]

3        SEC Use Only

4        Citizenship or Place of Organization

                  DELAWARE

                           5        Sole Voting Power
 Number of                                  465,000
   Shares
Beneficially               6        Shared Voting Power
  Owned By                                  0
    Each
  Reporting                7        Sole Dispositive Power
   Person                                   465,000
    With
                           8        Shared Dispositive Power
                                            0

9        Aggregate Amount Beneficially Owned by Each Reporting Person
                                            465,000/1/

10       Check Box If the Aggregate Amount in Row (9) Excludes Certain Shares*
                                            [x]

11       Percent of Class Represented By Amount in Row (9)

                                    .57%

12       Type of Reporting Person*

                  PN

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!

_______________
/1/ Position as of February 11, 1999.



<PAGE>


                                  SCHEDULE 13G

CUSIP No. 871130100                                          Page 10 of 30 Pages


1        Name of Reporting Person
         S.S. or I.R.S. Identification No. of Above Person (ENTITIES ONLY)

                  WINSTON PARTNERS II LDC

2        Check the Appropriate Box If a Member of a Group*
                                                     a.  [ ]
                                                     b.  [x]

3        SEC Use Only

4        Citizenship or Place of Organization

                  CAYMAN ISLANDS

                           5        Sole Voting Power
 Number of                                  2,162,000
   Shares
Beneficially               6        Shared Voting Power
  Owned By                                  0
    Each
  Reporting                7        Sole Dispositive Power
   Person                                   2,162,000
    With
                           8        Shared Dispositive Power
                                            0

9        Aggregate Amount Beneficially Owned by Each Reporting Person

                                            2,162,000/1/

10       Check Box If the Aggregate Amount in Row (9) Excludes Certain
         Shares*                                 [x]

11       Percent of Class Represented By Amount in Row (9)

                                    2.65%

12       Type of Reporting Person*

                  OO; IV

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!

_______________
/1/ Position as of February 11, 1999.


<PAGE>


                                  SCHEDULE 13G

CUSIP No. 871130100                                          Page 11 of 30 Pages


1        Name of Reporting Person
         S.S. or I.R.S. Identification No. of Above Person (ENTITIES ONLY)

                  WINSTON PARTNERS II LLC

2        Check the Appropriate Box If a Member of a Group*
                                                     a.  [ ]
                                                     b.  [x]

3        SEC Use Only

4        Citizenship or Place of Organization

                  DELAWARE

                           5        Sole Voting Power
 Number of                                  1,403,000
   Shares
Beneficially               6        Shared Voting Power
  Owned By                                  0
    Each
  Reporting                7        Sole Dispositive Power
   Person                                   1,403,000
    With
                           8        Shared Dispositive Power
                                            0

9        Aggregate Amount Beneficially Owned by Each Reporting Person

                                            1,403,000/1/

10       Check Box If the Aggregate Amount in Row (9) Excludes Certain
         Shares*                                      [x]

11       Percent of Class Represented By Amount in Row (9)

                                    1.72%

12       Type of Reporting Person*

                  OO; IV

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!

_______________
/1/ Position as of February 11, 1999.


<PAGE>


                                  SCHEDULE 13G

CUSIP No. 871130100                                          Page 12 of 30 Pages


1        Name of Reporting Person
         S.S. or I.R.S. Identification No. of Above Person (ENTITIES ONLY)

                  CHATTERJEE ADVISORS LLC

2        Check the Appropriate Box If a Member of a Group*
                                                     a.  [ ]
                                                     b.  [x]

3        SEC Use Only

4        Citizenship or Place of Organization

                  DELAWARE

                           5        Sole Voting Power
 Number of                                  3,565,000
   Shares
Beneficially               6        Shared Voting Power
  Owned By                                  0
    Each
  Reporting                7        Sole Dispositive Power
   Person                                   3,565,000
    With
                           8        Shared Dispositive Power
                                            0

9        Aggregate Amount Beneficially Owned by Each Reporting Person

                                            3,565,000/1/

10       Check Box If the Aggregate Amount in Row (9) Excludes Certain
         Shares*                                       [x]

11       Percent of Class Represented By Amount in Row (9)

                                    4.36%

12       Type of Reporting Person*

                  OO; IA

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!

_______________
/1/ Position as of February 11, 1999.

<PAGE>


                                  SCHEDULE 13G

CUSIP No. 871130100                                          Page 13 of 30 Pages


1        Name of Reporting Person
         S.S. or I.R.S. Identification No. of Above Person (ENTITIES ONLY)

                  CHATTERJEE MANAGEMENT COMPANY

2        Check the Appropriate Box If a Member of a Group*
                                                     a.  [ ]
                                                     b.  [x]

3        SEC Use Only

4        Citizenship or Place of Organization

                  DELAWARE

                           5        Sole Voting Power
 Number of                                  3,565,000
   Shares
Beneficially               6        Shared Voting Power
  Owned By                                  0
    Each
  Reporting                7        Sole Dispositive Power
   Person                                   3,565,000
    With
                           8        Shared Dispositive Power
                                            0

9        Aggregate Amount Beneficially Owned by Each Reporting Person

                                            3,565,000/1/

10       Check Box If the Aggregate Amount in Row (9) Excludes Certain
         Shares*                                        [x]

11       Percent of Class Represented By Amount in Row (9)

                                    4.36%

12       Type of Reporting Person*

                  CO; IA

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!

_______________
/1/ Position as of February 11, 1999.

<PAGE>


                                  SCHEDULE 13G

CUSIP No. 871130100                                          Page 14 of 30 Pages


1        Name of Reporting Person
         S.S. or I.R.S. Identification No. of Above Person (ENTITIES ONLY)

                  DR. PURNENDU CHATTERJEE (in the capacity described herein)

2        Check the Appropriate Box If a Member of a Group*
                                                     a.  [ ]
                                                     b.  [x]

3        SEC Use Only

4        Citizenship or Place of Organization

                  UNITED STATES

                           5        Sole Voting Power
 Number of                                  4,030,000
   Shares
Beneficially               6        Shared Voting Power
  Owned By                                  317,600
    Each
  Reporting                7        Sole Dispositive Power
   Person                                   4,030,000
    With
                           8        Shared Dispositive Power
                                            317,600

9        Aggregate Amount Beneficially Owned by Each Reporting Person

                                            4,347,600/1/

10       Check Box If the Aggregate Amount in Row (9) Excludes Certain
         Shares*                                     [x]

11       Percent of Class Represented By Amount in Row (9)

                                    5.32%

12       Type of Reporting Person*

                  IA

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!

_______________
/1/ Position as of February 11, 1999.

<PAGE>


                                                             Page 15 of 30 Pages



Item 1(a)         Name of Issuer:

                  Sybase, Inc. (the "Issuer").

Item 1(b)         Address of the Issuer's Principal Executive Offices:

                  6475 Christie Avenue, Emeryville, CA 94608.

Item 2(a)         Name of Person Filing:

                  This  statement  is filed on behalf  of each of the  following
                  persons (collectively, the "Reporting Persons"):

                  i)       Quantum  Industrial  Partners  LDC, a Cayman  Islands
                           exempted limited duration company ("QIP");

                  ii)      QIH  Management  Investor,  L.P., a Delaware  limited
                           partnership ("QIHMI");

                  iii)     QIH Management,  Inc., a Delaware  corporation  ("QIH
                           Management");

                  iv)      Soros  Fund  Management   LLC,  a  Delaware   limited
                           liability company ("SFM LLC");

                  v)       Mr. George Soros ("Mr. Soros");

                  vi)      Mr. Stanley F. Druckenmiller ("Mr. Druckenmiller");

                  vii)     Winston   Partners,    L.P.,   a   Delaware   limited
                           partnership ("Winston L.P.");

                  viii)    Chatterjee Fund Management,  L.P., a Delaware limited
                           partnership ("CFM");

                  ix)      Winston  Partners II LDC, a Cayman  Islands  exempted
                           limited duration company ("Winston LDC");

                  x)       Winston Partners II LLC, a Delaware limited liability
                           company ("Winston LLC");

                  xi)      Chatterjee Advisors LLC, a Delaware limited liability
                           company ("Chatterjee Advisors");

                  xii)     Chatterjee Management Company, a Delaware Corporation
                           ("Chatterjee Management"); and

                  xiii)    Dr. Purnendu Chatterjee ("Dr. Chatterjee").


                  This Statement  relates to Shares (as defined herein) held for
the accounts of Quantum Partners LDC, a Cayman Islands exempted limited duration
company  ("Quantum  Partners"),  QIP and Mr. Soros.  SFM LLC, a Delaware limited
liability  company,  serves as principal  investment manager to Quantum Partners



<PAGE>


                                                             Page 16 of 30 Pages


and as such, has been granted investment discretion over portfolio  investments,
including  the  Shares,  held for the  account of Quantum  Partners.  QIHMI,  an
investment  advisory firm, is vested with investment  discretion over the Shares
held  for  the  account  of  QIP.  Mr.  Soros  is the  sole  shareholder  of QIH
Management,  the sole  general  partner of QIHMI,  and  Chairman of SFM LLC. Mr.
Soros has entered into an  agreement  pursuant to which he has agreed to use his
best  efforts to cause QIH  Management  to act at the  direction of SFM LLC. Mr.
Druckenmiller is Lead Portfolio Manager and a Member of the Management Committee
of SFM LLC.  Dr.  Chatterjee  serves as a  sub-investment  advisor  to QIP.  Dr.
Chatterjee  has also  provided  advice to Mr.  Soros  relating  to his  personal
investment in Shares.

                  This Statement also relates to Shares held for the accounts of
Winston L.P., Winston LDC and Winston LLC.

                  CFM is a Delaware limited  partnership and the general partner
of Winston L.P. Dr. Chatterjee is the sole general partner of CFM.

                  Chatterjee Advisors, a Delaware limited liability company that
is managed and  controlled  by Dr.  Chatterjee,  serves as the  manager,  and is
responsible for  supervising the operations,  of each of Winston LDC and Winston
LLC. Chatterjee Advisors is also a shareholder of Winston LDC and Winston LLC.

                  Chatterjee Management,  a Delaware corporation that is managed
and  controlled  by Dr.  Chatterjee,  serves as  investment  advisor  to each of
Winston LDC and Winston LLC pursuant to investment  management contracts between
Chatterjee  Management,  Chatterjee Advisors and each of Winston LDC and Winston
LLC.

                  Chatterjee Advisors, as the manager of each of Winston LDC and
Winston  LLC,  and  by  reason  of its  ability  as  manager  to  terminate  the
contractual  relationship  of  Winston  LDC  and  Winston  LLC  with  Chatterjee
Management  within 60 days, and Chatterjee  Management,  by reason of its voting
and  dispositive  power over securities held for the accounts of Winston LDC and
Winston  LLC,  may each be  deemed  to be the  beneficial  owner  of  securities
(including  the Shares)  held for the account of each of Winston LDC and Winston
LLC.

Item 2(b)         Address of Principal Business Office or, if None, Residence:

                  The address of the  principal  business  office of each of QIP
and Winston LDC is Kaya Flamboyan 9, Willemstad,  Curacao, Netherlands Antilles.
The address of the principal  business office of each of QIHMI,  QIH Management,
SFM LLC, Mr. Soros and Mr.  Druckenmiller is 888 Seventh Avenue, 33rd Floor, New
York, NY 10106. The address of the principal  business office of each of Winston
L.P.,  CFM,  Winston LLC,  Chatterjee  Advisors,  Chatterjee  Management and Dr.
Chatterjee is 888 Seventh Avenue, 30th Floor, New York, NY 10106.

Item 2(c)         Citizenship:

                  i)       QIP is a Cayman  Islands  exempted  limited  duration
                           company;

                  ii)      QIHMI is a Delaware limited partnership;

                  iii)     QIH Management is a Delaware corporation;

                  iv)      SFM LLC is a Delaware limited liability company;


<PAGE>


                                                             Page 17 of 30 Pages



                  v)       Mr. Soros is a United States citizen;

                  vi)      Mr. Druckenmiller is a United States citizen;

                  vii)     Winston L.P., is a Delaware limited partnership;

                  viii)    CFM is a Delaware limited partnership;

                  ix)      Winston  LDC is a  Cayman  Islands  exempted  limited
                           duration company;

                  x)       Winston LLC is a Delaware limited liability company;

                  xi)      Chatterjee  Advisors is a Delaware limited  liability
                           company;

                  xii)     Chatterjee Management is a Delaware Corporation; and

                  xiii)    Dr. Chatterjee is a United States citizen.


Item 2(d)         Title of Class of Securities:

                           Common Stock, $.001 par value (the "Shares").

Item 2(e)         CUSIP Number:

                           871130100

Item 3.           If this  statement  is filed  pursuant  to Rule  13d-1(b),  or
                  13d-2(b), check whether the person filing is a:

                           This Item 3 is not applicable.

Item 4.           Ownership:

Item 4(a)         Amount Beneficially Owned:

                           As of  February  11,  1999,  each  of  the  Reporting
                           Persons  may be deemed  the  beneficial  owner of the
                           following number of Shares:

                           (i)   Each of QIP,  QIHMI  and QIH  Management may be
                           deemed the  beneficial  owner of the  317,600  Shares
                           held for the account of QIP.

                           (ii)  Each of SFM LLC  and Mr.  Druckenmiller  may be
                           deemed the beneficial  owner of 989,800 Shares.  This
                           number  consists of (A)  672,200  Shares held for the
                           account of Quantum  Partners  and (B) 317,600  Shares
                           held for the account of QIP.

                           (iii) Mr. Soros may be deemed the beneficial owner of
                           1,672,200 Shares. This number consists of (A) 682,400
                           Shares  held for his  personal  account,  (B) 672,200
                           


<PAGE>


                                                             Page 18 of 30 Pages


                           Shares held for the account of Quantum Partners,  and
                           (C) 317,600 Shares held for the account of QIP.

                           (iv)  Each of Winston  L.P.  and CFM may be deemed to
                           be the  beneficial  owner of the 465,000  Shares held
                           for the account of Winston Partners L.P.

                           (v)   Winston LDC may be deemed the beneficial  owner
                           of the 2,162,000 Shares held for its account.

                           (vi)  Winston LLC may be deemed the beneficial  owner
                           of 1,403,000 Shares held for its account.

                           (vii) Each of Chatterjee  Management  and  Chatterjee
                           Advisors  may  be  deemed  the  beneficial  owner  of
                           3,565,000   Shares.   This  number  consists  of  (A)
                           2,162,000  Shares held for the account of Winston LDC
                           and (B)  1,403,000  Shares  held for the  account  of
                           Winston LLC.

                           (viii)Dr.  Chatterjee  may be deemed  the  beneficial
                           owner of 4,347,600  Shares.  This number  consists of
                           (A)  465,000  Shares  held for the account of Winston
                           L.P.,  (B)  2,162,000  Shares held for the account of
                           Winston  LDC,  (C)  1,403,000  Shares  held  for  the
                           account of Winston  LLC and (D)  317,600  Shares held
                           for the account of QIP.


Item 4(b)         Percent of Class:

                           (i)   The  number  of  Shares  of which  each of QIP,
                           QIHMI  and QIH  Management  may be  deemed  to be the
                           beneficial owner  constitutes  approximately  .39% of
                           the total number of Shares outstanding.

                           (ii)  The  number of  Shares of which each of SFM LLC
                           and  Mr.  Druckenmiller  may  be  deemed  to  be  the
                           beneficial owner constitutes  approximately  1.21% of
                           the total number of Shares outstanding.

                           (iii) The number of Shares of which Mr.  Soros may be
                           deemed  to  be  the  beneficial   owner   constitutes
                           approximately  2.05% of the  total  number  of Shares
                           outstanding.

                           (iv)  The number of Shares of which  each of  Winston
                           L.P. and CFM may be deemed to be the beneficial owner
                           constitutes approximately .57% of the total number of
                           Shares outstanding.

                           (v)   The number of Shares of which  Winston  LDC may
                           be  deemed  to be the  beneficial  owner  constitutes
                           approximately  2.65% of the  total  number  of Shares
                           outstanding.

                           (vi)  The number of Shares of which  Winston  LLC may
                           be  deemed  to be the  beneficial  owner  constitutes
                           approximately  1.72% of the  total  number  of Shares
                           outstanding.

                           (vii) The   number  of   Shares  of  which   each  of
                           Chatterjee Advisors and Chatterjee  Management may be
                           deemed  to  be  the  beneficial   owner   constitutes
                           approximately  4.36% of the  total  number  of Shares
                           outstanding.



<PAGE>


                                                             Page 19 of 30 Pages


                           (viii)The  number of  Shares of which Dr.  Chatterjee
                           may be deemed to be the beneficial owner  constitutes
                           approximately  5.32% of the  total  number  of Shares
                           outstanding.

                  Dr. Chatterjee has reached understandings with each of Quantum
Partners  and SFM LLC pursuant to which Dr.  Chatterjee  will furnish to each of
Quantum  Partners and SFM LLC  recommendations  concerning  transactions  in the
Shares.  It is  contemplated by the Reporting  Persons that Dr.  Chatterjee will
share in any  profits  with  respect to Shares  held for the  account of Quantum
Partners  and in any  profits  or losses  with  respect  to Shares  held for the
account of Mr. Soros.


Item 4(c) Number of shares as to which such person has:

    QIP
    ---

    (i)   Sole power to vote or to direct the vote:                            0

    (ii)  Shared power to vote or to direct the vote:                    317,600

    (iii) Sole power to dispose or to direct the disposition of:               0

    (iv)  Shared power to dispose or to direct the disposition of:       317,600

    QIHMI
    -----

    (i)   Sole power to vote or to direct the vote:                            0

    (ii)  Shared power to vote or to direct the vote:                    317,600

    (iii) Sole power to dispose or to direct the disposition of:               0

    (iv)  Shared power to dispose or to direct the disposition of:       317,600

    QIH Management
    --------------

    (i)   Sole power to vote or to direct the vote:                            0

    (ii)  Shared power to vote or to direct the vote:                    317,600

    (iii) Sole power to dispose or to direct the disposition of:               0

    (iv)  Shared power to dispose or to direct the disposition of:       317,600



    <PAGE>


                                                             Page 20 of 30 Pages



    SFM LLC
    -------

    (i)   Sole power to vote or to direct the vote:                      672,200

    (ii)  Shared power to vote or to direct the vote:                    317,600

    (iii) Sole power to dispose or to direct the disposition of:         672,200

    (iv)  Shared power to dispose or to direct the disposition of:       317,600

    Mr. Soros
    ---------

    (i)   Sole power to vote or to direct the vote:                      682,400

    (ii)  Shared power to vote or to direct the vote:                    989,800

    (iii) Sole power to dispose or to direct the disposition of:         682,400

    (iv)  Shared power to dispose or to direct the disposition of:       989,800

    Mr. Druckenmiller
    -----------------

    (i)   Sole power to vote or to direct the vote:                            0

    (ii)  Shared power to vote or to direct the vote:                    989,800

    (iii) Sole power to dispose or to direct the disposition of:               0

    (iv)  Shared power to dispose or to direct the disposition of:       989,800

    Winston L.P.
    ------------

    (i)   Sole power to vote or to direct the vote:                      465,000

    (ii)  Shared power to vote or to direct the vote:                          0

    (iii) Sole power to dispose or to direct the disposition of:         465,000

    (iv)  Shared power to dispose or to direct the disposition of:             0



    <PAGE>


                                                             Page 21 of 30 Pages


    CFM
    ---

    (i)   Sole power to vote or to direct the vote:                      465,000

    (ii)  Shared power to vote or to direct the vote:                          0

    (iii) Sole power to dispose or to direct the disposition of:         465,000

    (iv)  Shared power to dispose or to direct the disposition of:             0

    Winston LDC
    -----------

    (i)   Sole power to vote or to direct the vote:                    2,162,000

    (ii)  Shared power to vote or to direct the vote:                          0

    (iii) Sole power to dispose or to direct the disposition of:       2,162,000

    (iv)  Shared power to dispose or to direct the disposition of:             0

    Winston LLC
    -----------

    (i)   Sole power to vote or to direct the vote:                    1,403,000

    (ii)  Shared power to vote or to direct the vote:                          0

    (iii) Sole power to dispose or to direct the disposition of:       1,403,000

    (iv)  Shared power to dispose or to direct the disposition of:             0

    Chatterjee Advisors
    -------------------

    (i)   Sole power to vote or to direct the vote:                    3,565,000

    (ii)  Shared power to vote or to direct the vote:                          0

    (iii) Sole power to dispose or to direct the disposition of:       3,565,000

    (iv)  Shared power to dispose or to direct the disposition of:             0



<PAGE>


                                                             Page 22 of 30 Pages


    Chatterjee Management
    ---------------------

    (i)   Sole power to vote or to direct the vote:                    3,565,000

    (ii)  Shared power to vote or to direct the vote:                          0

    (iii) Sole power to dispose or to direct the disposition of:       3,565,000

    (iv)  Shared power to dispose or to direct the disposition of:             0

    Dr. Chatterjee
    --------------

    (i)   Sole power to vote or to direct the vote:                    4,030,000

    (ii)  Shared power to vote or to direct the vote:                    317,600

    (iii) Sole power to dispose or to direct the disposition of:       4,030,000

    (iv)  Shared power to dispose or to direct the disposition of:       317,600


Item 5.           Ownership of Five Percent or Less of a Class:

                           This Item 5 is not applicable.

Item 6.           Ownership  of More than  Five  Percent  on  Behalf of  Another
                  Person:

                  (i)  The  shareholders of QIP,  including  Quantum  Industrial
Holdings Ltd., a British Virgin Islands international business company, have the
right to participate in the receipt of dividends from, or proceeds from the sale
of, the Shares held for the account of QIP in  accordance  with their  ownership
interests in QIP.

                  (ii) Mr.  Soros  has the  sole  right  to  participate  in the
receipt of dividends  from, or proceeds  from the sale of, the Shares,  held for
this personal account.

                  (iii)The shareholders of Quantum  Partners,  including Quantum
Fund N.V., a Netherlands Antilles company,  have the right to participate in the
receipt of dividends  from,  or proceeds  from the sale of, the Shares,  held by
Quantum  Partners  in  accordance  with  their  ownership  interests  in Quantum
Partners.

                  (iv) The   partners  of  Winston   L.P.   have  the  right  to
participate in the receipt of dividends  from, or proceeds from the sale of, the
Shares held for the account of Winston L.P. in accordance with their partnership
interests in Winston L.P.

                  (v)  The  shareholders  of  Winston  LDC  have  the  right  to
participate in the receipt of dividends  from, or proceeds from the sale of, the
Shares held by Winston  LDC in  accordance  with their  ownership  interests  in
Winston LDC.

                  (vi) The members of Winston LLC have the right to  participate
in the receipt of dividends  from,  or proceeds from the sale of, Shares held by
Winston LLC in accordance with their ownership interests in Winston LLC.


<PAGE>


                                                             Page 23 of 30 Pages



         Each of QIP, QIHMI and QIH Management  expressly  disclaims  beneficial
ownership of any Shares held directly for the accounts of Quantum Partners,  Mr.
Soros,  Winston  L.P.,  Winston  LDC and  Winston  LLC.  Each of SFM LLC and Mr.
Druckenmiller  expressly  disclaims  beneficial  ownership  of any  Shares  held
directly for the accounts of Mr. Soros,  Winston  L.P.,  Winston LDC and Winston
LLC.  Mr.  Soros  expressly  disclaims  beneficial  ownership of any Shares held
directly for the accounts of Winston L.P.,  Winston LDC and Winston LLC. Winston
LDC expressly disclaims beneficial ownership of any Shares held directly for the
accounts of Winston  L.P.,  Winston LLC,  QIP,  Quantum  Partners and Mr. Soros.
Winston LLC expressly disclaims beneficial ownership of any Shares held directly
for the  accounts of Winston  L.P.,  Winston  LDC,  QIP,  Mr.  Soros and Quantum
Partners.  Each of  Chatterjee  Advisors  and  Chatterjee  Management  expressly
disclaims  beneficial  ownership of any Shares held directly for the accounts of
Winston L.P., QIP,  Quantum  Partners and Mr. Soros.  Dr.  Chatterjee  expressly
disclaims  beneficial  ownership of any Shares held directly for the accounts of
Mr. Soros and Quantum Partners. Each of Winston L.P. and CFM expressly disclaims
beneficial  ownership  of any Shares  held  directly  for the  accounts  of QIP,
Quantum Partners, Mr. Soros, Winston LDC and Winston LLC.

Item 7.           Identification  and  Classification  of the  Subsidiary  Which
                  Acquired the Security  Being Reported on by the Parent Holding
                  Company:

                  This Item 7 is not applicable.

Item 8.           Identification and Classification of Members of the Group:

                  This Item 8 is not applicable.

Item 9.           Notice of Dissolution of Group:

                  This Item 9 is not applicable.

Item 10.          Certification:

                  By signing below each signatory certifies that, to the best of
his/its knowledge and belief, the securities referred to above were not acquired
and  are  not  held  for the  purpose  of or with  the  effect  of  changing  or
influencing  the control of the Issuer of the  securities  and were not acquired
and are not  held in  connection  with or as a  participant  in any  transaction
having that purpose or effect.



<PAGE>


                                                             Page 24 of 30 Pages


                                   SIGNATURES


After  reasonable  inquiry  and to the  best of my  knowledge  and  belief,  the
undersigned  certifies that the information set forth in this statement is true,
complete and correct.


Date:  February 12, 1999               QUANTUM INDUSTRIAL PARTNERS LDC


                                       By:   /S/ MICHAEL C. NEUS
                                             -----------------------------------
                                             Michael C. Neus
                                             Attorney-in-Fact

Date:  February 12, 1999               QIH MANAGEMENT INVESTOR, L.P.

                                       By:   QIH Management, Inc.,
                                             its General Partner


                                             
                                             By:  /S/ MICHAEL C. NEUS
                                                  ------------------------------
                                                  Michael C. Neus
                                                  Attorney-in-Fact

Date:  February 12, 1999               QIH MANAGEMENT, INC.


                                       By:   /S/ MICHAEL C. NEUS
                                             -----------------------------------
                                             Michael C. Neus
                                             Vice President

Date:  February 12, 1999               SOROS FUND MANAGEMENT LLC


                                       By:   /S/ MICHAEL C. NEUS
                                             -----------------------------------
                                             Michael C. Neus
                                             Assistant General Counsel

Date:  February 12, 1999               GEORGE SOROS


                                       By:   /S/ MICHAEL C. NEUS
                                             -----------------------------------
                                             Michael C. Neus
                                             Attorney-in-Fact


<PAGE>


                                                             Page 25 of 30 Pages



Date:  February 12, 1999               STANLEY F. DRUCKENMILLER


                                       By:   /S/ MICHAEL C. NEUS
                                             -----------------------------------
                                             Michael C. Neus
                                             Attorney-in-Fact

Date:  February 12, 1999               WINSTON PARTNERS, L.P.

                                       By:   Chatterjee Fund Management, L.P.,
                                             General Partner

                                             By:  Purnendu Chatterjee,
                                                  General Partner


                                                  By:  /S/ PETER HURWITZ
                                                       -------------------------
                                                       Peter Hurwitz
                                                       Attorney-in-Fact

Date:  February 12, 1999               CHATTERJEE FUND MANAGEMENT, L.P.

                                       By:   Purnendu Chatterjee,
                                             General Partner


                                             By:  /S/ PETER HURWITZ
                                                  ------------------------------
                                                  Peter Hurwitz
                                                  Attorney-in-Fact


Date:  February 12, 1999               WINSTON PARTNERS II LDC


                                       By:   /S/ PETER HURWITZ
                                             -----------------------------------
                                             Peter Hurwitz
                                             Attorney-in-Fact


Date:  February 12, 1999               WINSTON PARTNERS II LLC

                                       By:   Chatterjee Advisors LLC, 
                                             its Manager


                                             By:  /S/ PETER HURWITZ
                                                  ------------------------------
                                                  Peter Hurwitz
                                                  Manager



<PAGE>


                                                             Page 26 of 30 Pages


Date:  February 12, 1999               CHATTERJEE ADVISORS LLC


                                       By:   /S/ PETER HURWITZ
                                             -----------------------------------
                                             Peter Hurwitz
                                             Manager


Date:  February 12, 1999               CHATTERJEE MANAGEMENT COMPANY


                                       By:   /S/ PETER HURWITZ
                                             -----------------------------------
                                             Peter Hurwitz
                                             Vice President


Date:  February 12, 1999               PURNENDU CHATTERJEE


                                       By:   /S/ PETER HURWITZ
                                             -----------------------------------
                                             Peter Hurwitz
                                             Attorney-in-Fact



<PAGE>


                                                             Page 27 of 30 Pages





                                  EXHIBIT INDEX

                                                                        Page No.
                                                                        --------

G.       Joint Filing  Agreement  dated  February 12, 1999 by and
         among Quantum  Industrial  Partners LDC, QIH  Management
         Investor,   L.P.,  QIH  Management,   Inc.,  Soros  Fund
         Management  LLC,  Mr.  George  Soros,   Mr.  Stanley  F.
         Druckenmiller,  Winston Partners,  L.P., Chatterjee Fund
         Management,  L.P.,  Winston  Partners  II  LDC,  Winston
         Partners II LLC,  Chatterjee  Advisors  LLC,  Chatterjee
         Management Company and Dr. Purnendu Chatterjee..........             28






                                                             Page 28 of 30 Pages



                                    EXHIBIT G

                             JOINT FILING AGREEMENT

         The  undersigned  hereby agree that the  statement on Schedule 13G with
respect to the Common  Stock of Sybase,  Inc.  dated as of February 12, 1999 is,
and any amendments thereto (including amendments on Schedule 13D) signed by each
of the  undersigned  shall be,  filed on behalf of each of us pursuant to and in
accordance  with the provisions of Rule 13d-1(f)  under the Securities  Exchange
Act of 1934.


Date:  February 12, 1999               QUANTUM INDUSTRIAL PARTNERS LDC


                                       By:   /S/ MICHAEL C. NEUS
                                             -----------------------------------
                                             Michael C. Neus
                                             Attorney-in-Fact

Date:  February 12, 1999               QIH MANAGEMENT INVESTOR, L.P.

                                       By:   QIH Management, Inc.,
                                             its General Partner


                                             
                                             By:  /S/ MICHAEL C. NEUS
                                                  ------------------------------
                                                  Michael C. Neus
                                                  Attorney-in-Fact

Date:  February 12, 1999               QIH MANAGEMENT, INC.


                                       By:   /S/ MICHAEL C. NEUS
                                             -----------------------------------
                                             Michael C. Neus
                                             Vice President

Date:  February 12, 1999               SOROS FUND MANAGEMENT LLC


                                       By:   /S/ MICHAEL C. NEUS
                                             -----------------------------------
                                             Michael C. Neus
                                             Assistant General Counsel


<PAGE>


                                                             Page 29 of 30 Pages




Date:  February 12, 1999               GEORGE SOROS


                                       By:   /S/ MICHAEL C. NEUS
                                             -----------------------------------
                                             Michael C. Neus
                                             Attorney-in-Fact


Date:  February 12, 1999               STANLEY F. DRUCKENMILLER


                                       By:   /S/ MICHAEL C. NEUS
                                             -----------------------------------
                                             Michael C. Neus
                                             Attorney-in-Fact

Date:  February 12, 1999               WINSTON PARTNERS, L.P.

                                       By:   Chatterjee Fund Management, L.P.,
                                             General Partner

                                             By:  Purnendu Chatterjee,
                                                  General Partner


                                                  By:  /S/ PETER HURWITZ
                                                       -------------------------
                                                       Peter Hurwitz
                                                       Attorney-in-Fact

Date:  February 12, 1999               CHATTERJEE FUND MANAGEMENT, L.P.

                                       By:   Purnendu Chatterjee,
                                             General Partner


                                             By:  /S/ PETER HURWITZ
                                                  ------------------------------
                                                  Peter Hurwitz
                                                  Attorney-in-Fact


Date:  February 12, 1999               WINSTON PARTNERS II LDC


                                       By:   /S/ PETER HURWITZ
                                             -----------------------------------
                                             Peter Hurwitz
                                             Attorney-in-Fact


<PAGE>


                                                             Page 30 of 30 Pages




Date:  February 12, 1999               WINSTON PARTNERS II LLC

                                       By:   Chatterjee Advisors LLC, 
                                             its Manager


                                             By:  /S/ PETER HURWITZ
                                                  ------------------------------
                                                  Peter Hurwitz
                                                  Manager


Date:  February 12, 1999               CHATTERJEE ADVISORS LLC


                                       By:   /S/ PETER HURWITZ
                                             -----------------------------------
                                             Peter Hurwitz
                                             Manager


Date:  February 12, 1999               CHATTERJEE MANAGEMENT COMPANY


                                       By:   /S/ PETER HURWITZ
                                             -----------------------------------
                                             Peter Hurwitz
                                             Vice President


Date:  February 12, 1999               PURNENDU CHATTERJEE


                                       By:   /S/ PETER HURWITZ
                                             -----------------------------------
                                             Peter Hurwitz
                                             Attorney-in-Fact




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