SYBASE INC
SC 13D/A, 1997-07-24
PREPACKAGED SOFTWARE
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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  SCHEDULE 13D

                    Under the Securities Exchange Act of 1934
                               (Amendment No. 4)*

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

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

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

                              Stephen M. Vine, Esq.
                    Akin, Gump, Strauss, Hauer & Feld, L.L.P.
                               590 Madison Avenue
                            New York, New York 10022
                                 (212) 872-1000
                   -------------------------------------------
                  (Name, Address and Telephone Number of Person
                Authorized to Receive Notices and Communications)

                                  July 17, 1997
                           --------------------------
                      (Date of Event which Requires Filing
                               of this Statement)

If the filing person has previously  filed a statement on Schedule 13G to report
the  acquisition  which is the subject of this  Schedule 13D, and is filing this
schedule because of Rule 13d-1(b)(3) or (4), check the following box [_].

Note: Six copies of this statement, including all exhibits, should be filed with
the  Commission.  See Rule 13d- 1(a) for other  parties to whom copies are to be
sent.

*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 disclosure
provided in a prior cover page.

The information required on 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 ("Act") 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 18 Pages


<PAGE>


                                                              Page 2 of 18 Pages

                                  SCHEDULE 13D

CUSIP No. 871130100

1        Name of Reporting Person
         S.S. or I.R.S. Identification No. of Above Person

                  QUANTUM INDUSTRIAL PARTNERS LDC

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

3        SEC Use Only

4        Source of Funds*

                  WC

5        Check Box If Disclosure of Legal  Proceedings  Is Required  Pursuant to
         Items 2(d) or 2(e) [_]

6        Citizenship or Place of Organization

                  Cayman Islands

                           7        Sole Voting Power
 Number of                                  0
   Shares
Beneficially               8        Shared Voting Power
  Owned By                                  1,079,600
    Each
  Reporting                9        Sole Dispositive Power
   Person                                   0
    With
                           10       Shared Dispositive Power
                                            1,079,600

11       Aggregate Amount Beneficially Owned by Each Reporting Person

                                            1,079,600

12       Check Box If the Aggregate  Amount in Row (11) Excludes Certain Shares*
         [x]


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

                                    1.37%

14       Type of Reporting Person*

                  OO; IV

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!


<PAGE>


                                                              Page 3 of 18 Pages

                                  SCHEDULE 13D

CUSIP No. 871130100

1        Name of Reporting Person
         S.S. or I.R.S. Identification No. of Above Person

                  QIH MANAGEMENT INVESTOR, L.P.

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

3        SEC Use Only

4        Source of Funds*

                  AF

5        Check Box If Disclosure of Legal  Proceedings  Is Required  Pursuant to
         Items 2(d) or 2(e) [_]

6        Citizenship or Place of Organization

                  Delaware

                           7        Sole Voting Power
  Number of                                 0
   Shares
Beneficially               8        Shared Voting Power
  Owned By                                  1,079,600
   Each
  Reporting                9        Sole Dispositive Power
   Person                                   0
    With
                           10       Shared Dispositive Power
                                            1,079,600

11       Aggregate Amount Beneficially Owned by Each Reporting Person

                                            1,079,600

12       Check Box If the Aggregate  Amount in Row (11) Excludes Certain Shares*
         [x]


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

                                    1.37%

14       Type of Reporting Person*

                  PN; IA

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!


<PAGE>


                                                              Page 4 of 18 Pages

                                  SCHEDULE 13D

CUSIP No. 871130100

1        Name of Reporting Person
         S.S. or I.R.S. Identification No. of Above Person

                  QIH MANAGEMENT, INC.

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

3        SEC Use Only

4        Source of Funds*

                  AF

5        Check Box If Disclosure of Legal  Proceedings  Is Required  Pursuant to
         Items 2(d) or 2(e) [_]

6        Citizenship or Place of Organization

                  Delaware

                           7        Sole Voting Power
 Number of                                  0
   Shares
Beneficially               8        Shared Voting Power
  Owned By                                  1,079,600
    Each
  Reporting                9        Sole Dispositive Power
   Person                                   0
    With
                           10       Shared Dispositive Power
                                            1,079,600

11       Aggregate Amount Beneficially Owned by Each Reporting Person

                                            1,079,600

12       Check Box If the Aggregate  Amount in Row (11) Excludes Certain Shares*
         [x]


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

                                    1.37%

14       Type of Reporting Person*

                  CO

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!


<PAGE>


                                                              Page 5 of 18 Pages

                                  SCHEDULE 13D

CUSIP No. 871130100


1        Name of Reporting Person
         S.S. or I.R.S. Identification No. of Above Person

                  SOROS FUND MANAGEMENT LLC

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

3        SEC Use Only

4        Source of Funds*

                  AF

5        Check Box If Disclosure of Legal  Proceedings  Is Required  Pursuant to
         Items 2(d) or 2(e) [_]

6        Citizenship or Place of Organization

                  Delaware

                           7        Sole Voting Power
  Number of                                 716,200
   Shares
Beneficially               8        Shared Voting Power
  Owned By                                  1,079,600
    Each
  Reporting                9        Sole Dispositive Power
   Person                                   716,200
    With
                           10       Shared Dispositive Power
                                            1,079,600

11       Aggregate Amount Beneficially Owned by Each Reporting Person

                                            1,795,800

12       Check Box If the Aggregate  Amount in Row (11) Excludes Certain Shares*
         [x]

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

                                    2.28%

14       Type of Reporting Person*

                  OO; IA

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!


<PAGE>


                                                              Page 6 of 18 Pages

                                  SCHEDULE 13D

CUSIP No. 871130100

1        Name of Reporting Person
         S.S. or I.R.S. Identification No. of Above Person

                  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        Source of Funds*

                  PF; AF

5        Check Box If Disclosure of Legal  Proceedings  Is Required  Pursuant to
         Items 2(d) or 2(e) [_]

6        Citizenship or Place of Organization

                  United States

                           7        Sole Voting Power
 Number of                                  2,200,000
   Shares
Beneficially               8        Shared Voting Power
  Owned By                                  1,795,800
    Each
  Reporting                9        Sole Dispositive Power
   Person                                   2,200,000
    With
                           10       Shared Dispositive Power
                                            1,795,800

11       Aggregate Amount Beneficially Owned by Each Reporting Person

                                            3,995,800

12       Check Box If the Aggregate  Amount in Row (11) Excludes Certain Shares*
         [x]

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

                                    5.08%

14       Type of Reporting Person*

                  IA; IN

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!


<PAGE>


                                                              Page 7 of 18 Pages

                                  SCHEDULE 13D

CUSIP No. 871130100


1        Name of Reporting Person
         S.S. or I.R.S. Identification No. of Above Person

                  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        Source of Funds*

                  AF

5        Check Box If Disclosure of Legal  Proceedings  Is Required  Pursuant to
         Items 2(d) or 2(e) [_]

6        Citizenship or Place of Organization

                  United States

                           7        Sole Voting Power
  Number of                                 0
   Shares
Beneficially               8        Shared Voting Power
  Owned By                                  1,795,800
    Each
  Reporting                9        Sole Dispositive Power
   Person                                   0
    With
                           10       Shared Dispositive Power
                                            1,795,800

11       Aggregate Amount Beneficially Owned by Each Reporting Person

                                            1,795,800

12       Check Box If the Aggregate  Amount in Row (11) Excludes Certain Shares*
         [x]

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

                                    2.28%

14       Type of Reporting Person*

                  IA

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!


<PAGE>


                                                              Page 8 of 18 Pages

                                  SCHEDULE 13D

CUSIP No. 871130100

1        Name of Reporting Person
         S.S. or I.R.S. Identification No. of Above Person

                  WINSTON PARTNERS II LDC

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

3        SEC Use Only

4        Source of Funds*

                  WC

5        Check Box If Disclosure of Legal  Proceedings  Is Required  Pursuant to
         Items 2(d) or 2(e) [_]

6        Citizenship or Place of Organization

                  Cayman Islands

                           7        Sole Voting Power
 Number of                                  2,022,000
   Shares
Beneficially               8        Shared Voting Power
  Owned By                                  0
    Each
  Reporting                9        Sole Dispositive Power
   Person                                   2,022,000
    With
                           10       Shared Dispositive Power
                                            0

11       Aggregate Amount Beneficially Owned by Each Reporting Person

                                            2,022,000

12       Check Box If the Aggregate  Amount in Row (11) Excludes Certain Shares*
         [x]

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

                                    2.57%

14       Type of Reporting Person*

                  OO; IV

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!


<PAGE>

                                                              Page 9 of 18 Pages

                                  SCHEDULE 13D

CUSIP No. 871130100

1        Name of Reporting Person
         S.S. or I.R.S. Identification No. of Above Person

                  WINSTON PARTNERS II LLC

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

3        SEC Use Only

4        Source of Funds*

                  WC

5        Check Box If Disclosure of Legal  Proceedings  Is Required  Pursuant to
         Items 2(d) or 2(e) [_]

6        Citizenship or Place of Organization

                  Delaware

                           7        Sole Voting Power
 Number of                                  1,008,000
  Shares
Beneficially               8        Shared Voting Power
  Owned By                                  0
    Each
  Reporting                9        Sole Dispositive Power
   Person                                   1,008,000
    With
                           10       Shared Dispositive Power
                                            0

11       Aggregate Amount Beneficially Owned by Each Reporting Person

                                            1,008,000

12       Check Box If the Aggregate  Amount in Row (11) Excludes Certain Shares*
         [x]

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

                                    1.28%

14       Type of Reporting Person*

                  OO; IV

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!


<PAGE>


                                                             Page 10 of 18 Pages

                                  SCHEDULE 13D

CUSIP No. 871130100

1        Name of Reporting Person
         S.S. or I.R.S. Identification No. of Above Person

                  CHATTERJEE ADVISORS LLC

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

3        SEC Use Only

4        Source of Funds*

                  AF

5        Check Box If Disclosure of Legal  Proceedings  Is Required  Pursuant to
         Items 2(d) or 2(e) [_]

6        Citizenship or Place of Organization

                  Delaware

                           7        Sole Voting Power
 Number of                                  3,030,000
   Shares
Beneficially               8        Shared Voting Power
  Owned By                                  0
    Each
  Reporting                9        Sole Dispositive Power
   Person                                   3,030,000
    With
                           10       Shared Dispositive Power
                                            0

11       Aggregate Amount Beneficially Owned by Each Reporting Person

                                            3,030,000

12       Check Box If the Aggregate  Amount in Row (11) Excludes Certain Shares*
         [x]

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

                                    3.85%

14       Type of Reporting Person*

                  OO; IA

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!


<PAGE>


                                                             Page 11 of 18 Pages

                                  SCHEDULE 13D

CUSIP No. 871130100

1        Name of Reporting Person
         S.S. or I.R.S. Identification No. of Above Person

                  CHATTERJEE MANAGEMENT COMPANY

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

3        SEC Use Only

4        Source of Funds*

                  AF

5        Check Box If Disclosure of Legal  Proceedings  Is Required  Pursuant to
         Items 2(d) or 2(e) [_]

6        Citizenship or Place of Organization

                  Delaware

                           7        Sole Voting Power
 Number of                                  3,030,000
   Shares
Beneficially               8        Shared Voting Power
  Owned By                                  0
    Each
  Reporting                9        Sole Dispositive Power
   Person                                   3,030,000
    With
                           10       Shared Dispositive Power
                                            0

11       Aggregate Amount Beneficially Owned by Each Reporting Person

                                            3,030,000

12       Check Box If the Aggregate  Amount in Row (11) Excludes Certain Shares*
         [x]

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

                                    3.85%

14       Type of Reporting Person*

                  CO; IA

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!


<PAGE>


                                                             Page 12 of 18 Pages

                                  SCHEDULE 13D

CUSIP No. 871130100

1        Name of Reporting Person
         S.S. or I.R.S. Identification No. of Above Person

                  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        Source of Funds*

                  AF

5        Check Box If Disclosure of Legal  Proceedings  Is Required  Pursuant to
         Items 2(d) or 2(e) [x]

6        Citizenship or Place of Organization

                  United States

                           7        Sole Voting Power
 Number of                                  3,030,000
   Shares
Beneficially               8        Shared Voting Power
  Owned By                                  1,079,600
    Each
  Reporting                9        Sole Dispositive Power
   Person                                   3,030,000
    With
                           10       Shared Dispositive Power
                                            1,079,600

11       Aggregate Amount Beneficially Owned by Each Reporting Person

                                            4,109,600

12       Check Box If the Aggregate  Amount in Row (11) Excludes Certain Shares*
         [x]

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

                                    5.22%

14       Type of Reporting Person*

                  IA

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!


<PAGE>


                                                             Page 13 of 18 Pages


          This  Amendment  No. 4 to  Schedule  13D  relates  to shares of Common
Stock,  $0.001  par  value  per share  (the  "Shares"),  of  Sybase,  Inc.  (the
"Issuer").  This Amendment No. 4 supplementally  amends the initial statement on
Schedule 13D dated  December 2, 1996 and all amendments  thereto  (collectively,
the "Initial Statement") filed by certain of the Reporting Persons as defined in
the Initial  Statements.  This  Amendment  No. 4 is being filed by the Reporting
Persons  to report  that as a result of recent  acquisitions  of Shares  for the
accounts of certain of the Reporting Persons,  the number of Shares of which the
Reporting Persons currently may be deemed the beneficial owners has increased by
more than one percent of the total  outstanding  Shares.  Capitalized terms used
but not defined  herein shall have the meanings  ascribed to them in the Initial
Statement. The Initial Statement is supplementally amended as follows.


Item 3.   Source and Amount of Funds or Other Consideration.

          QIP  expended  approximately  $7,440,000  of its  working  capital  to
purchase the Shares  reported  herein as having been acquired for its account in
the last 60 days.  Mr. Soros expended  approximately  $5,955,000 of his personal
funds to purchase  the Shares  reported  herein as having been  acquired for his
personal  account  in  the  last  60  days.   Chatterjee   Management   expended
approximately  $996,800  of the working  capital of Winston LDC to purchase  the
Shares reported herein as having been acquired for Winston LDC's account in last
60 days.  Chatterjee Management expended  approximately  $488,600 of the working
capital of Winston LLC to  purchase  the Shares  reported  herein as having been
acquired for Winston LLC's account in the last 60 days.


Item 5.   Interest in Securities of the Issuer.

     (a)  (i)  Each of QIP, QIHMI and QIH  Management  may be deemed  beneficial
owner of the 1,079,600 Shares held for the account of QIP  (approximately  1.37%
of the total number of Shares outstanding).

          (ii) Each  of  SFM  LLC  and  Mr.  Druckenmiller  may  be  deemed  the
beneficial owner of 1,795,800 Shares (approximately 2.28% of the total number of
Shares  outstanding).  This number  consists of (A) 716,200  Shares held for the
account of Quantum  Partners,  and (B) 1,079,600  Shares held for the account of
QIP.

          (iii)Mr. Soros may be deemed the beneficial  owner of 3,995,800 Shares
(approximately  5.08% of the total  number of Shares  outstanding).  This number
consists of (A)  2,200,000  Shares held for his  personal  account,  (B) 716,200
Shares held for the account of Quantum  Partners,  and (C) 1,079,600 Shares held
for the account of QIP.

          (iv) Winston LDC may be deemed the  beneficial  owner of the 2,022,000
Shares currently held for its account  (approximately  2.57% of the total number
of Shares outstanding).

          (v)  Winston LLC may be deemed the  beneficial  owner of the 1,008,000
Shares currently held for its account  (approximately  1.28% of the total number
of Shares outstanding).



<PAGE>


                                                             Page 14 of 18 Pages

          (vi) Each of  Chatterjee  Advisors and  Chatterjee  Management  may be
deemed the  beneficial  owner of 3,030,000  Shares  (approximately  3.85% of the
total  number of Shares  outstanding).  This number  consists  of (A)  2,022,000
Shares held for the account of Winston LDC and (B) 1,008,000 Shares held for the
account of Winston LLC.

          (vii)Dr.  Chatterjee may be deemed the  beneficial  owner of 4,109,600
Shares  (approximately  5.22% of the total number of Shares  outstanding).  This
number consists of (A) 2,022,000 Shares held for the account of Winston LDC, (B)
1,008,000  Shares held for the account of Winston LLC and (C)  1,079,600  Shares
held for the account of QIP.

     (b)  (i)  Each of QIP, QIHMI, QIH Management, SFM LLC (by virtue of the QIP
contract), Mr. Soros (as result of his position with SFM LLC), Mr. Druckenmiller
(as a result of his position  with SFM LLC) and Dr.  Chatterjee  (as a result of
his position as a sub-investment  advisor to QIP with respect to the Shares) may
be deemed to have the shared power to direct the voting and  disposition  of the
1,079,600 Shares held for the account of QIP.

          (ii) Pursuant to the  contract  between  Quantum Fund and SFM LLC, SFM
LLC may be deemed to have sole power to direct the voting and disposition of the
716,200 Shares held for the account of Quantum Partners.

          (iii)Pursuant to the contract  between Quantum Fund and SFM LLC and as
a result of the positions held by Mr. Soros and Mr.  Druckenmiller with SFM LLC,
each of Mr.  Soros and Mr.  Druckenmiller  may be deemed to have shared power to
direct the voting and  disposition of the 716,200 Shares held for the account of
Quantum Partners.

          (iv) Mr.  Soros  holds the sole  power to vote and to  dispose  of the
2,200,000 Shares held for his personal account.

          (v)  Each of Winston LDC,  Chatterjee  Advisors (as manager of Winston
LDC),  Chatterjee  Management  (as  investment  advisor to Winston  LDC) and Dr.
Chatterjee (as the person ultimately in control of both Chatterjee  Advisors and
Chatterjee Management) may be deemed to have the sole power to direct the voting
and disposition of the 2,022,000 Shares held for the account of Winston LDC.

          (vi) Each of Winston LLC,  Chatterjee  Advisors (as manager of Winston
LLC),  Chatterjee  Management  (as  investment  advisor to Winston  LLC) and Dr.
Chatterjee (as the person ultimately in control of both Chatterjee  Advisors and
Chatterjee Management) may be deemed to have the sole power to direct the voting
and disposition of the 1,008,000 Shares held for the account of Winston LLC.

     (c)  Except for the transactions  disclosed on Annex B hereto, all of which
were effected in the over-the-counter  market in routine brokerage transactions,
there have been no  transactions  with  respect to the Shares since May 26, 1997
(60 days prior to the date hereof),  by any of the Reporting  Persons or, to the
best of the  Reporting  Persons'  knowledge,  any other  persons  identified  in
response to Item 2 of the Initial Statement.



<PAGE>


                                                             Page 15 of 18 Pages

     (d)  (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 his personal
account.

          (iii)The  shareholders of Quantum  Partners,  including  Quantum Fund,
have the right to participate in the receipt of dividends from, or proceeds from
the sale of, the Shares held for the account of Quantum  Partners in  accordance
with their ownership interests in Quantum Partners.

          (iv) The  shareholders of Winston LDC,  including  Winston Partners II
Offshore Ltd., a British Virgin Islands international business corporation, 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 LDC in accordance with their
ownership interests in Winston LDC.

          (v)  The members of Winston LLC 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 LLC in accordance with their  ownership  interests in Winston
LLC.

     (e)  Not applicable.

          Each of SFM LLC and Mr.  Druckenmiller  expressly disclaims beneficial
ownership  of any Shares not held  directly  for the accounts of the SFM Clients
and the account of QIP. Mr. Soros expressly  disclaims  beneficial  ownership of
any Shares not held  directly for his  account,  the accounts of the SFM Clients
and  the  account  of  QIP.  Each of QIP,  QIHMI  and QIH  Management  expressly
disclaims  beneficial  ownership of any Shares not held directly for the account
of QIP.  Each of Winston  LDC and  Winston LLC  expressly  disclaims  beneficial
ownership of any Shares not held  directly for its account.  Each of  Chatterjee
Advisors and Chatterjee  Management  expressly disclaims beneficial ownership of
any Shares not held  directly  for the  accounts of Winston LDC and Winston LLC.
Dr. Chatterjee  expressly disclaims  beneficial ownership of any Shares not held
directly for the accounts of QIP, Winston LDC and Winston LLC.




<PAGE>


                                                             Page 16 of 18 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.


Dated: July 24, 1997                         QUANTUM INDUSTRIAL PARTNERS LDC


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


                                             QIH MANAGEMENT INVESTOR, L.P.

                                             By:  QIH Management, Inc.,
                                                  its General Partner


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


                                             QIH MANAGEMENT, INC.


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


                                             SOROS FUND MANAGEMENT LLC


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


                                             GEORGE SOROS

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



<PAGE>


                                                             Page 17 of 18 Pages

                                             STANLEY F. DRUCKENMILLER


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


                                             WINSTON PARTNERS II LDC


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


                                             WINSTON PARTNERS II LLC

                                             By:  Chatterjee Advisors LLC
                                                  its Manager


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


                                             CHATTERJEE ADVISORS LLC


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


                                             CHATTERJEE MANAGEMENT COMPANY


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


                                             PURNENDU CHATTERJEE


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


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                                                             Page 18 of 18 Pages
                                     ANNEX B

                   RECENT TRANSACTIONS IN THE COMMON STOCK OF
                                  SYBASE, INC.

                                          Date of          Nature of            Number                 Price
For the Account of                      Transaction       Transaction          of Shares             Per Share
- ------------------                      -----------       -----------          ---------             ---------
<S>                                    <C>               <C>                  <C>                   <C>
Quantum Industrial
Partners LDC/1/                        07/17/97             Buy                   25,000             14.531
                                       07/17/97             Buy                  111,800             15.097
                                       07/17/97             Buy                   75,000             14.968
                                       07/18/97             Buy                  220,800             14.905
                                       07/21/97             Buy                   67,400             14.472

Winston
Partners II LDC/2/                     07/17/97             Buy                    3,300             14.531
                                       07/17/97             Buy                   14,900             15.097
                                       07/17/97             Buy                   10,000             14.968
                                       07/18/97             Buy                   29,400             14.905
                                       07/21/97             Buy                    9,400             14.472

Winston
Partners II LLC/2/                     07/17/97             Buy                    1,700             14.531
                                       07/17/97             Buy                    5,000             14.968
                                       07/17/97             Buy                    3,400             15.097
                                       07/18/97             Buy                   14,700             14.905
                                       07/21/97             Buy                    8,200             14.472

George Soros                           07/17/97             Buy                   20,000             14.531
                                       07/17/97             Buy                   93,400             15.097
                                       07/17/97             Buy                   60,000             14.968
                                       07/18/97             Buy                  176,600             14.905
                                       07/21/97             Buy                   50,000             14.472

- -------------------
/1/ Transactions effected at the direction of SFM LLC and Dr. Chatterjee.
/2/ Transactions effected at the direction of Chatterjee Management.

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