EXPRESS SCRIPTS INC
PRE 14A, 1999-04-09
SPECIALTY OUTPATIENT FACILITIES, NEC
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                       SECURITIES AND EXCHANGE COMMISSION

                             WASHINGTON, D.C. 20549

                            SCHEDULE 14A INFORMATION

     Proxy Statement Pursuant to Section 14(a) of the Securities Act of 1934
                                (Amendment No. )

Filed by the Registrant  X
Filed by a Party other than the Registrant

Check the appropriate box:
X Preliminary Proxy Statement           Confidential, for use of the Commission
                                        only (as permitted by Rule 14a-6(e)(2)
  Definitive Proxy Statement
  Definitive Additional Materials
  Soliciting Material Pursuant to Rule 14a-11(c) or Rule 14a-12

                              EXPRESS SCRIPTS, INC.
                (Name of Registrant As Specified in its Charter)


    (Name of Person(s) Filing Proxy Statement. If other than the Registrant)

Payment of Filing Fee (Check the appropriate box): 

X No fee required.
  Fee computed on table below per Exchange Act Rules 14a-6(i)(1) and 0-11.

1)  Title of each class of securities to which transaction applies:



2)  Aggregate number of securities to which transaction applies:



3)   Per unit price or other underlying value of transaction computed pursuant
     to Exchange Act Rule 0-11 (set forth the amount on which the filing fee is
     calculated and state how it was determined):



4)  Proposed maximum aggregate value of transaction:

5)  Total fee paid:

  Fee paid previously with preliminary materials.

  Check box if any part of the fee is offset as provided by Exchange Act Rule
   0-11(a)(2) and identify the filing for which the offsetting fee was paid
   previously. Identify the previous filing by registration statement number, or
   the form or schedule and the date of its filing.

   1)  Amount previously paid:

   2)  Form, Schedule or Registration Statement No.:

   3)  Filing party:

   4)  Date filed:

<PAGE>

                          [COMPANY LOGO INSERTED HERE]
                                                         PRELIMINARY COPIES
                              EXPRESS SCRIPTS, INC.
                              14000 RIVERPORT DRIVE
                        MARYLAND HEIGHTS, MISSOURI 63043

                    NOTICE OF ANNUAL MEETING OF STOCKHOLDERS
                                  MAY 26, 1999

       The 1999 Annual Meeting of Stockholders of EXPRESS SCRIPTS, INC., a
Delaware corporation (the "Company"), will be held at the offices of the
Company, 13900 Riverport Drive, Maryland Heights, Missouri 63043, on Wednesday,
May 26, 1999, at 9:30 a.m. Central Time, to consider and act upon the following
matters:

     1. to elect ten (10)  directors  to serve until the next Annual  Meeting of
Stockholders or until their respective successors are elected and qualified;

     2. to approve the Company's Employee Stock Purchase Plan;

     3. to approve the Company's Executive Deferred Compensation Plan;

     4. to approve the Third  Amendment  to the  Company's  Amended and Restated
1994 Stock Option Plan;

     5. to approve the First  Amendment  to the  Company's  Amended and Restated
1992 Stock Option Plan;

     6. to approve the Fourth  Amendment to the  Company's  Amended and Restated
1994 Stock Option Plan;

     7. to approve the Second  Amendment to the  Company's  Amended and Restated
1992 Stock Option Plan;

     8. to approve the Second  Amendment to the  Company's  Amended and Restated
1992 Stock Option Plan for Outside Directors;

     9. to amend the  Company's  Certificate  of  Incorporation  to increase the
number of authorized shares of Class A Common Stock to 250,000,000 shares;

     10. to amend the Company's  Certificate  of  Incorporation  to increase the
number of authorized shares of Class B Common Stock to 65,000,000 shares;

     11.  to  ratify  the  appointment  of  PricewaterhouseCoopers  LLP  as  the
Company's independent accountants for the Company's current fiscal year; and

     12. to transact such other business as may properly come before the meeting
or any adjournments thereof.

     Only stockholders of record at the close of business on March 31, 1999, are
entitled to notice of and to vote at the Meeting. At least ten days prior to the
Meeting, a complete list of stockholders  entitled to vote will be available for
inspection by any  stockholder  for any purpose  germane to the Meeting,  during
ordinary  business hours, at the office of the Secretary of the Company at 14000
Riverport Drive,  Maryland Heights,  Missouri 63043. As a stockholder of record,
you are cordially  invited to attend the Meeting in person. If you do not expect
to be present,  please  complete,  sign and date the enclosed  Proxy and mail it
promptly in the enclosed  envelope.  The return of the  enclosed  Proxy will not
affect your right to vote in person if you attend the Meeting.

                                 By Order of the Board of Directors


                                /s/ Thomas M. Boudreau
                                Thomas M. Boudreau
                                Secretary
14000 Riverport Drive
Maryland Heights, Missouri 63043
April 21, 1999

     THE RETURN OF YOUR  SIGNED  PROXY AS  PROMPTLY  AS  POSSIBLE  WILL  GREATLY
FACILITATE  ARRANGEMENTS FOR THE MEETING. NO POSTAGE IS REQUIRED IF THE PROXY IS
RETURNED IN THE ENVELOPE  ENCLOSED FOR YOUR CONVENIENCE AND MAILED IN THE UNITED
STATES.

<PAGE>


                          [COMPANY LOGO INSERTED HERE]
                                                             PRELIMINARY COPIES
                              EXPRESS SCRIPTS, INC.
                              14000 RIVERPORT DRIVE
                        MARYLAND HEIGHTS, MISSOURI 63043

                       1999 ANNUAL MEETING OF STOCKHOLDERS
                                 PROXY STATEMENT

     This Proxy  Statement is furnished in connection  with the  solicitation of
proxies  by the  Board  of  Directors  of  Express  Scripts,  Inc.,  a  Delaware
corporation  (the  "Company"),  to be  voted  at  the  1999  Annual  Meeting  of
Stockholders  of the Company (the "Meeting") and any  adjournment  thereof.  The
Meeting  will be held at the  offices of the  Company,  13900  Riverport  Drive,
Maryland  Heights,  Missouri  63043,  on  Wednesday,  May 26, 1999, at 9:30 a.m.
Central Time,  for the purposes set forth in the  accompanying  Notice of Annual
Meeting of Stockholders  and in this Proxy  Statement.  This Proxy Statement and
the  accompanying  Proxy will first be sent or given to stockholders on or about
April 21, 1999.

     A Proxy,  in the  accompanying  form,  which  is  properly  executed,  duly
returned to the Company and not revoked,  will be voted in  accordance  with the
instructions  contained  therein  and, in the absence of specific  instructions,
will be voted as follows:  (i) for the nominees for director named in this Proxy
Statement;  (ii) for the proposal to approve the Express Scripts,  Inc. Employee
Stock Purchase Plan (the "ESPP");  (iii) for the proposal to approve the Express
Scripts, Inc. Executive Deferred  Compensation Plan (the "Deferred  Compensation
Plan");  (iv) for the  proposal  to approve the Third  Amendment  to the Express
Scripts, Inc. Amended and Restated 1994 Stock Option Plan (the "1994 Plan"); (v)
for the  proposal to approve the First  Amendment to the Express  Scripts,  Inc.
Amended and Restated  1992 Stock Option Plan (the "the 1992 Plan" and,  together
with the 1994 Plan, the "Employee Stock Option Plans"); (vi) for the proposal to
approve the Fourth Amendment to the 1994 Plan; (vii) for the proposal to approve
the Second  Amendment  to the 1992 Plan;  (viii) for the proposal to approve the
Second  Amendment to the Express  Scripts,  Inc. Amended and Restated 1992 Stock
Option Plan for Outside Directors (the "Outside  Directors Plan");  (ix) for the
proposals to amend the Company's  Certificate of  Incorporation  to increase the
number of  authorized  shares  of Class A Common  Stock to  250,000,000  and the
number of  authorized  shares  of Class B Common  Stock to  65,000,000;  (x) for
ratification  of the  appointment of  PricewaterhouseCoopers  LLP as independent
accountants  for the Company for 1999; and (xi) in accordance  with the judgment
of the  person or  persons  voting  the  proxies  on any other  matter  that may
properly be brought before the Meeting and any  adjournment  thereof.  Each such
Proxy granted may be revoked at any time  thereafter by writing to the Secretary
of the Company prior to the Meeting,  by executing  and  delivering a subsequent
proxy or by  attending  and  voting in person at the  Meeting,  except as to any
matter or matters upon which,  prior to such revocation,  a vote shall have been
cast pursuant to the authority conferred by such Proxy.

                                VOTING SECURITIES

     Stockholders  of record as of the close of  business on March 31, 1999 (the
"Record Date") will be entitled to notice of, and to vote at, the Meeting or any
adjournments  thereof.  On the Record  Date there  were  18,231,470  outstanding
shares of the  Company's  Class A Common  Stock,  $.01 par value per share  (the
"Class A Common  Stock"),  and  15,020,000  outstanding  shares of the Company's
Class B Common  Stock,  $.01 par value per share  (the  "Class B Common  Stock",
which,  together with the Class A Common  Stock,  are  hereinafter  collectively
referred to as the "Common Stock"). All of the outstanding shares of the Class B
Common  Stock  are  owned  by  NYLIFE  HealthCare   Management,   Inc.  ("NYLIFE
HealthCare"), a Delaware corporation and an indirect subsidiary of New York Life
Insurance  Company,  a mutual insurance company organized and existing under the
laws of the State of New York ("New York Life"). Unless otherwise provided,  all
shares of Class A Common Stock and Class B Common  Stock  included in this Proxy
Statement  have been  adjusted  to reflect a 2-for-1  stock  split  effected  on
October 30, 1998 (the "1998 Stock Split").

     The Class B Common Stock is convertible into shares of Class A Common Stock
on a share-for-share  basis at any time at the option of the holder, and will be
automatically  converted to Class A Common Stock upon any transfer to any entity
other than New York Life or its  affiliates.  Each  holder of the Class A Common
Stock is entitled to one vote for each share held by such holder and each holder
of the Class B Common Stock is entitled to ten votes for each share held by such
holder.  In all respects other than voting power and the  convertibility  of the
Class B Common  Stock,  the Class A Common  Stock  and Class B Common  Stock are
identical.  The Class A Common Stock and the Class B Common Stock vote  together
as a single  class on all matters  except where  Delaware  law or the  Company's
Certificate of Incorporation require otherwise.

     The presence,  in person or by proxy,  of the holders of shares entitled to
cast a majority of the votes of all  outstanding  shares  entitled to vote shall
constitute a quorum at the Meeting.  A  stockholder  who abstains from a vote by
registering an abstention  vote will be deemed present at the Meeting for quorum
purposes  but such  abstention  will have the same effect as a vote  against the
particular matter under consideration. In the event a nominee holding shares for
beneficial  owners votes on certain matters pursuant to discretionary  authority
or instructions  from beneficial  owners,  but with respect to one or more other
matters  does not  receive  instructions  from  beneficial  owners  and does not
exercise discretionary  authority (a so-called  "non-vote"),  the shares held by
the nominee will be deemed  present at the Meeting for quorum  purposes but will
be  disregarded.  Thus,  on the proposal to elect  directors,  which  requires a
plurality of the votes of shares  present in person or  represented by proxy and
entitled to vote on the election of directors,  abstentions  and non-votes  will
have no effect. However, approval of each of the ESPP, the Deferred Compensation
Plan,  the Third and Fourth  Amendments  to the 1994 Plan,  the First and Second
Amendments to the 1992 Plan, and the Second  Amendment to the Outside  Directors
Plan requires the affirmative vote of a majority of the votes of shares present,
in person or by proxy,  and entitled to vote at the Meeting,  voting as a single
class. Accordingly, abstentions will have the same effect as votes against these
proposals, while non-votes will be disregarded and have no effect on the outcome
of these  proposals.  Approval of each of the proposals to amend the Certificate
of Incorporation requires the affirmative vote of a majority of the total voting
power of the  outstanding  Class A Common  Stock and Class B Common Stock voting
together  as a  single  class  and  voting  separately  by  class.  Accordingly,
abstentions  and  non-votes  will have the same  effect as votes  against  these
proposals.

         SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT

     The following table sets forth certain information regarding the beneficial
ownership of the  Company's  Class A Common Stock and Class B Common Stock as of
March 1, 1999 (unless  otherwise  noted) by (i) each person known by the Company
to own beneficially more than five percent of the outstanding  shares of Class A
Common  Stock  or Class B  Common  Stock,  (ii)  each of the  five  most  highly
compensated  executive officers and each director of the Company,  and (iii) all
executive officers and directors of the Company as a group. Included are amounts
of shares  which may be  acquired on March 1, 1999 or within 60 days of March 1,
1999  pursuant  to the  exercise  of  stock  options  by  employees  or  outside
directors.  Unless otherwise  indicated,  each of the persons or entities listed
below  exercise  sole voting and  investment  power over the shares that each of
them  beneficially  owns.  All  beneficial  owners  other than New York Life own
shares of Class A Common Stock. New York Life, as a beneficial owner, owns Class
B  Common  Stock.  These  percentages  do not give  effect  to  possible  future
issuances of capital stock.  See "IX. And X. Proposals to Amend the  Certificate
of Incorporation to Increase Authorized Shares of Common Stock."

<TABLE>
                                         SHARES BENEFICIALLY OWNED
<CAPTION>

             NAME AND ADDRESS              NUMBER   PERCENT OF
                                                       CLASS
<S>                                             <C>    <C>      

     CLASS A COMMON STOCK:
       Howard I. Atkins..................       0        *
       Judith E. Campbell................       0        *
       Richard M. Kernan, Jr.............       0        *
       Richard A. Norling(1).............  48,000        *
       Frederick J. Sievert..............       0        *
       Stephen N. Steinig................       0        *
       Seymour Sternberg(2)..............   6,000        *
       Barrett A. Toan(3)................ 372,592       2.0%
       Howard L. Waltman(4)..............  19,200        *
       Norman Zachary(5).................  34,000        *
       Stuart L. Bascomb(6)..............  63,493        *
       Patrick J. Byrne(7)...............      20        *
       David A. Lowenberg(8).............  68,602        *
       George Paz (9)....................  21,039        *
       Directors and Executive
         Officers as a Group (20          792,345       4.3%
       persons)(10)......................
       Pilgrim Baxter &
         Associates, Ltd.(11)...........2,481,100      13.3%
         825 Duportail Road
         Wayne, Pennsylvania 19087
       AMVESCAP PLC(12).................2,229,600      11.9%
         11 Devonshire Square
         London, England EC2M 4YR

     CLASS B COMMON STOCK:
       NYLIFE HealthCare Management,
         Inc.(13)(14)(15)...............15,020,000      100%

 ..................

    * Indicates less than 1%

<FN>
     (1)  Consists of options for 48,000  shares  granted  under the Amended and
Restated 1992 Stock Option Plan for Outside  Directors  (the "Outside  Directors
Plan"). 

     (2) Excludes 360 shares held by Mr. Sternberg's son, as to which shares Mr.
Sternberg  disclaims  beneficial  ownership. 

     (3) Includes  options for 348,000  shares  granted under the Employee Stock
Option Plans. See "Executive Compensation -- Stock Options" for a description of
certain restrictions on Mr. Toan's ability to transfer shares subject to options
and "Executive  Compensation  -- Employment  Agreement" for a description of the
terms of his employment  agreement with the Company governing his options.  Also
included are 592 hypothetical  share  equivalents  invested in the Company Stock
Fund under the Deferred Compensation Plan, calculated as of March 1, 1999, using
the February 26, 1999 per share closing price as reported on The Nasdaq National
Market  ("Nasdaq").  

     (4)  Consists  of  options  for 19,200  shares  granted  under the  Outside
Directors  Plan.  

     (5)  Consists  of  options  for 34,000  shares  granted  under the  Outside
Directors  Plan.  

     (6) Includes  options for 51,680 shares  granted  under the Employee  Stock
Option Plans, 10,300 shares owned by Mr. Bascomb, of which 3,300 shares are held
as  co-trustee  (with shared  voting and  dispositive  power) of a trust for the
benefit of his mother, and 1,513 hypothetical share equivalents  invested in the
Company Stock Fund under the Deferred  Compensation Plan, calculated as of March
1, 1999,  using the  February  26, 1999 per share  closing  price as reported on
Nasdaq. 

     (7) Consists of 20 hypothetical  share equivalents  invested in the Company
Stock Fund under the Deferred Compensation Plan, calculated as of March 1, 1999,
using the February 26, 1999 per share closing  price as reported on Nasdaq.  

     (8) Consists of options for 68,440 shares  granted under the Employee Stock
Option Plans, and 162  hypothetical  share  equivalents  invested in the Company
Stock Fund under the Deferred Compensation Plan, calculated as of March 1, 1999,
using the February 26, 1999 per share closing  price as reported on Nasdaq. 

     (9) Consists of options for 21,000 shares  granted under the Employee Stock
Option Plans,  and 39  hypothetical  share  equivalents  invested in the Company
Stock Fund under the Deferred Compensation Plan, calculated as of March 1, 1999,
using the February 26, 1999 per share closing price as reported on Nasdaq.

     (10)  Includes  options  for  742,400  shares  granted  under  the  Outside
Directors Plan and the Employee  Stock Option Plans,  2,645  hypothetical  share
equivalents  invested in the Company Stock Fund under the Deferred  Compensation
Plan,  calculated  as of March 1, 1999,  using the  February  26, 1999 per share
closing price as reported on Nasdaq. 

     (11) The  information  with  respect to the  beneficial  ownership of these
shares as of December 31, 1998 has been obtained from a copy of an Amendment No.
10 to  Schedule  13G dated  February  10,  1999.  Such filing  reports  that the
beneficial owner is a registered  investment  advisor and it shares voting power
with respect to all of the shares reported but has sole dispositive  power as to
all of the shares reported. 

     (12) The  information  with  respect to the  beneficial  ownership of these
shares as of December 31, 1998 has been obtained from a copy of an Amendment No.
2 to  Schedule  13G dated  February  10,  1999.  Such  filing  reports  that the
beneficial  owner is a parent  holding  company and it shares  voting  power and
dispositive power as to all of the shares reported.

     (13)  Messrs.  Atkins,  Kernan,  Sievert,  Steinig and  Sternberg,  and Ms.
Campbell,  directors  of the  Company,  are also  directors  and/or hold various
executive  positions with New York Life and/or NYLIFE  HealthCare,  as described
herein.  All of the foregoing  directors  disclaim  beneficial  ownership of the
Company's  Class  B  Common  Stock  owned  by  NYLIFE  HealthCare. 

     (14) NYLIFE  HealthCare  holds  15,020,000  shares of Class B Common Stock,
which will be automatically converted upon transfer (other than to New York Life
or its  affiliates)  at any  time  into  shares  of  Class A  Common  Stock on a
share-for-share basis and otherwise at the option of NYLIFE HealthCare. 

     (15) If converted to Class A Common Stock,  the Class B Common Stock would,
as of March 1, 1999,  represent  approximately  45% of the  outstanding  Class A
Common Stock.

</FN>
</TABLE>

                            I. ELECTION OF DIRECTORS

     At the Meeting, the entire Board of Directors,  comprised of ten directors,
is to be elected to serve until the next Annual Meeting of Stockholders or until
their  successors  shall be duly elected and qualified.  The number of directors
was fixed by the Board of Directors  pursuant to the  Company's  Bylaws.  Unless
otherwise  specified,  all  proxies  will be voted in favor of the ten  nominees
listed below as directors of the Company.

     The Board of  Directors  has no reason to expect  that any of the  nominees
will be unable to stand for  election at the date of the  Meeting.  If a vacancy
occurs among the  original  nominees  prior to the Meeting,  the proxies will be
voted  for a  substitute  nominee  named by the Board of  Directors  and for the
remaining  nominees.  Directors  are elected by a  plurality  of the votes cast.
NYLIFE HealthCare has indicated its intention to vote its shares for election of
the ten nominees.  Assuming NYLIFE  HealthCare  votes in favor of such nominees,
such vote would be sufficient to elect the nominees.  The following  information
is furnished  as of March 1, 1999,  with respect to each of the nominees for the
Board of Directors:

NAME, POSITION AND PRINCIPAL OCCUPATION

     Howard I.  Atkins,  48, was  elected a director  of the  Company in January
1997. He has been an Executive Vice President and the Chief Financial Officer of
New York Life since April 1996. From September 1991 until joining New York Life,
Mr.  Atkins was the Executive  Vice  President  and Chief  Financial  Officer of
Midlantic Bank Corporation. Mr. Atkins is also a director and officer of certain
subsidiaries  of New York Life and,  until July 1998,  was a director of NYLCare
Health Plans,  Inc.  ("NYLCare"),  a former subsidiary of New York Life that was
sold to Aetna U.S. HealthCare Inc. ("Aetna") on July 15, 1998.

     Judith E.  Campbell,  51, was elected a director of the Company in November
1997. Ms.  Campbell has been a Senior Vice  President and the Chief  Information
Officer of New York Life since June, 1997. From October,  1995 until joining New
York Life, Ms. Campbell was Senior Vice President of Consumer  Banking,  Manager
of Deposit  Products,  Consumer  Payments  and Direct  Banking of  PNCBank.  Ms.
Campbell  served as a Senior Vice President of Midlantic Bank  Corporation  from
May, 1992 until October,  1995, when Midlantic Bank was acquired by PNCBank. Ms.
Campbell is also a director of certain subsidiaries of New York Life.

     Richard M. Kernan,  Jr., 58, was elected a director of the Company in March
1992. He has been an Executive  Vice President of New York Life since March 1991
and the Chief Investment Officer of New York Life since June 1997. Mr. Kernan is
also Chairman of the Board of Trustees of The Mainstay  Funds  Limited,  and the
Chairman and CEO of Mainstay VP Series Fund, Inc., both subsidiaries of New York
Life,  and a director and officer of NYLIFE  HealthCare  and other New York Life
subsidiaries. Mr. Kernan was also a director of NYLCare until July 1998.

     Richard A.  Norling,  53, was  elected a director  of the  Company in March
1992. Mr.  Norling has been the Chief  Executive  Officer of Premier,  Inc., the
largest  voluntary  healthcare  alliance in the U.S., since September 1998. From
September 1997 until September 1998, Mr. Norling was the Chief Operating Officer
of Premier.  From July 1989 until joining Premier, Mr. Norling was the President
and Chief  Executive  Officer of Fairview  Hospital and HealthCare  Services,  a
regional  integrated  network of hospitals,  ambulatory care services and health
care management enterprises.

     Frederick  J.  Sievert,  51, was  elected a director of the Company in July
1995.  Since  January 1997,  Mr.  Sievert has been the Vice Chairman of New York
Life.  From February 1995 to December  1996,  Mr.  Sievert was an Executive Vice
President of New York Life.  From January 1992 to January 1995,  Mr. Sievert was
Senior Vice  President  of New York Life in charge of financial  management  and
policyholder services for Individual Operations.  Mr. Sievert is also a director
and officer of other subsidiaries of New York Life and was a director of NYLCare
until July 1998.

     Stephen N.  Steinig,  53, was  elected a director of the Company in January
1994.  Since February 1994, Mr. Steinig has been Senior Vice President and Chief
Actuary of New York Life.  From  February  1992 to February  1994,  he was Chief
Actuary and Controller of New York Life. Mr. Steinig is also an officer of other
subsidiaries of New York Life and was a director of NYLCare until July 1998.

     Seymour Sternberg, 55, was elected a director of the Company in March 1992.
Mr. Sternberg is the Chairman, President and Chief Executive Officer of New York
Life.  He has been  with New York  Life  since  February  1989,  serving  as the
President and Chief Operating  Officer from October 1995 to April 1997, the Vice
Chairman from February to September  1995,  and as an Executive  Vice  President
from  March  1992 to  February  1995.  Mr.  Sternberg  is also  Chairman,  Chief
Executive  Officer  and  President  of NYLIFE  HealthCare,  and a director or an
officer of a number of other New York Life subsidiaries.  Mr. Sternberg also was
a director of NYLCare until July 1998.

     Barrett A. Toan, 51, was elected Chief Executive  Officer of the Company in
March 1992,  and President and a director in October 1990.  Mr. Toan has been an
executive  employee  of the  Company  since May  1989.  Pursuant  to Mr.  Toan's
employment agreement, failure of the stockholders to elect Mr. Toan to the Board
of  Directors  would  entitle Mr. Toan to  terminate  his  employment  for "Good
Reason" (as defined in the agreement). See "Executive Compensation -- Employment
Agreement."

     Howard L. Waltman,  66, was elected Chairman of the Board of the Company in
March 1992.  Mr.  Waltman has been a director of the Company since its inception
in September  1986.  From 1983 until September 1992, Mr. Waltman was Chairman of
the Board and Chief Executive  Officer of Sanus Corp.  Health Systems,  a wholly
owned subsidiary of New York Life, which became known as NYLCare. From September
1992 to  December  31,  1995,  Mr.  Waltman  served as  Chairman of the Board of
NYLCare.

     Norman  Zachary,  72, was  elected a director of the Company in March 1992.
From June 1967 to November 1991,  Mr.  Zachary held various  positions at Logica
Data Architects,  Inc. (formerly known as Data Architects,  Inc.) ("Logica"),  a
consulting and software development company,  including serving as President and
a director until November 1990. Logica provided  consulting services to New York
Life from time to time.

                      COMMITTEES OF THE BOARD OF DIRECTORS

     The Company has established an Executive Committee,  an Audit Committee and
a Compensation  Committee of the Board of Directors.  During  intervals  between
meetings  of the Board of  Directors,  the  Executive  Committee  (comprised  of
Messrs. Kernan, Sievert, Sternberg (Chairperson), Toan, Waltman and Zachary) has
all the powers and  authority  of the Board of  Directors,  except as  otherwise
provided by the Board of Directors, the Company's Bylaws, or as required by law.
The  Audit  Committee  (comprised  of  Messrs.  Norling,   Steinig  and  Zachary
(Chairperson))  reviews the internal controls of the Company and the objectivity
of its financial reporting. In addition, the Audit Committee must review and, by
majority vote, approve material  transactions with related parties (see "Certain
Relationships   and   Related   Transactions   -  Approval   of  Related   Party
Transactions").  A majority of the Audit Committee must be unaffiliated with the
Company and its affiliates.  The  Compensation  Committee  (comprised of Messrs.
Sievert   (Chairperson),   Sternberg  and  Zachary)  administers  the  Company's
compensation plans. The Company does not have a standing Nominating Committee.

     During  1998,  the Board of Directors  held nine  meetings,  the  Executive
Committee  held five  meetings,  the Audit  Committee held five meetings and the
Compensation Committee held twelve meetings. Each director attended at least 75%
of the  aggregate  number of  meetings  held by the Board of  Directors  and the
Committees  on which he or she  served  during  1998,  except Mr.  Steinig,  who
attended approximately 67%.

                             DIRECTORS' COMPENSATION

     Directors  of the Company who are also  employed by the Company or New York
Life or its  subsidiaries do not receive  compensation for serving as directors.
During 1998, directors who were not employees of the Company or New York Life or
its  subsidiaries  received an annual  retainer of $10,000 and a fee of $750 for
each  Board  or  Committee  meeting   attended.   The  Company  also  reimburses
non-employee  directors for  out-of-pocket  expenses incurred in connection with
attending Board and Committee Meetings.

     Under the Outside  Directors Plan, prior to the amendment thereto effective
January 24, 1996,  each  non-employee  director  received a one-time  grant of a
ten-year option to purchase 28,000 shares of Class A Common Stock at an exercise
price equal to the fair market  value of the Class A Common Stock at the date of
grant. This option became exercisable in three equal annual  installments on the
first three  anniversaries  of the grant date.  Mr. Norling and Mr. Zachary were
granted options to purchase 28,000 shares each upon the closing of the Company's
initial public offering in June 1992.

     Effective January 24, 1996, each non-employee director who is first elected
or appointed as a  non-employee  director on or after such date shall  receive a
ten-year  option to purchase 48,000 shares of the Class A Common Stock as of the
date of the first Board  meeting he or she attends as a  non-employee  director.
These options will become  exercisable in five equal installments at the rate of
one-fifth  per year on each  anniversary  of the grant date.  In addition,  each
non-employee  director  who was first  elected or  appointed  as a  non-employee
director prior to January 24, 1996 received an option to purchase 20,000 shares,
in addition to the 28,000 previously granted. These additional options vested in
two  installments  of 10,000 shares each on June 16, 1996 and June 16, 1997. The
exercise price of all options granted under the Outside  Directors Plan is equal
to the fair market value of the Class A Common  Stock at the date of grant.  Mr.
Norling and Mr. Zachary were each granted options to purchase 20,000  additional
shares  effective  January 24,  1996,  and Mr.  Waltman was granted an option to
purchase 48,000 shares effective May 22, 1996.

     The  Company is  proposing  to amend the  Outside  Directors  Plan to award
additional options to each non-employee director, adjust the number of shares to
be issued to each director to reflect the 1998 Stock Split and modify certain of
the vesting provisions of options granted under the plan. See "VIII. Proposal to
Approve the Second Amendment to the Express  Scripts,  Inc. Amended and Restated
1992 Stock Option Plan for Outside Directors."

                      REPORT OF THE COMPENSATION COMMITTEE
                            ON EXECUTIVE COMPENSATION

     The  Compensation  Committee  of the Board of Directors  (the  "Committee")
administers the Company's  compensation plans,  including the Company's employee
stock option  plans and its recently  adopted  Executive  Deferred  Compensation
Plan. The Committee's overall recommendations regarding compensation are subject
to approval of the Board of  Directors;  although the Committee has authority to
grant stock  options  under the Company's  employee  stock option plans,  it now
recommends  stock  option  grants  for  executive   officers  to,  and  acts  in
conjunction  with, the full Board of Directors in awarding stock options to such
individuals  in order to comply with the rules  adopted  under Section 16 of the
Securities Exchange Act of 1934, as amended.

COMPENSATION PLAN

     The  Company's  general  compensation  policy for its  executive  officers,
including  the  Chief  Executive  Officer  ("CEO"),  is  to  provide  short-term
compensation consisting of two components,  a fixed base salary and a cash bonus
awarded based upon specific  short-term  financial and non-financial  objectives
for the individual  and the Company,  and long-term  compensation  consisting of
options to purchase the Company's stock based upon the  Committee's  judgment as
to the relative  contribution  of each officer to the  long-term  success of the
Company. In addition,  the Company has adopted a deferred  compensation plan for
senior  executives  and has entered into severance  agreements  with certain key
executives.  The CEO consults with the Committee  regarding the  compensation of
the  Company's  executive  and senior vice  presidents.  The  Committee  reviews
executive compensation on an annual basis.

     The  Company's  policy is to  combine  short-term  compensation,  long-term
incentive  compensation  and other  components of the  compensation  package for
executives  to create a total  compensation  package  that is  competitive  with
compensation  packages for executive  officers of similarly  sized  companies in
comparable businesses.

     During 1998, the Company engaged a nationally recognized consulting firm to
review compensation  levels for the Company's executive officers.  The study was
based  on a group  of  comparable  companies  in  health  care  and  information
intensive   businesses,   together  with  other   companies   with   high-growth
characteristics  similar to those of the Company (the  "Comparable  Companies").
The consultant  determined that the Company's executive officers,  including its
CEO,  were  generally  compensated  at levels lower than the 50th  percentile of
total  compensation  received  by  executives  in  comparable  positions  at the
Comparable Companies. Accordingly, the Committee approved certain adjustments to
the base  salary and bonus  levels for the  executive  officers  to take  effect
March,  1999 to bring  executive  compensation  in line with the 50th percentile
level  of  compensation  for  the  Comparable  Companies.   The  Committee  also
recommended  long-term  incentive  compensation awards in the form of additional
stock options,  which were made in December 1998,  and the  implementation  of a
deferred compensation plan, both as discussed below.

     The  Committee  continues to evaluate  the impact of Section  162(m) of the
Internal Revenue Code on the  deductibility of executive  officer  compensation.
The Committee is endeavoring to maximize the  deductibility  of  compensation to
the extent practicable while maintaining competitive compensation.

COMPONENTS OF EXECUTIVE COMPENSATION

     BASE SALARY: The Committee  determines the salary ranges for each executive
officer   position   in  the   Company   based  upon  the  level  and  scope  of
responsibilities  of the  position  and the pay levels of  similarly  positioned
executive  officers in companies deemed  comparable by the Committee.  The CEO's
evaluation of the level of  responsibility of each position (other than his own)
and the performance of each other executive  officer is of paramount  importance
when base salary is determined.  For 1998 compensation,  which was determined in
late  1997,  the  Committee  obtained  information  about the  salary  and total
compensation  of officers in comparable  companies  through  review of published
reports and periodic surveys, and from the consulting firm described above.

     ANNUAL BONUS COMPENSATION: Each executive officer's bonus currently has two
components:  (i) an amount  based on the  Company's  profitability  goal for the
year, and (ii) an amount based on achieving  specific work plan objectives.  For
each executive  officer,  each component of the bonus is expressed as a specific
dollar amount. In general, the profitability component represents  approximately
43  percent  of the total  annual  bonus  amount,  and the work plan  objectives
represent the remaining 57 percent.  The potential bonus amount for 1998 for any
executive  officer (other than the CEO) is between  approximately 31 percent and
50 percent of their  respective  base  salary,  depending on the extent to which
that executive officer's department can help meet certain Company-wide goals.

     Executive  officers  are eligible  for annual  bonus  payments  only to the
extent that the Company meets certain  predetermined  profitability goals, which
are  approved by the Board in its annual  review of the  Company's  budget.  For
1998, the goals were based on the Company's budgeted net income for 1998. If the
Company  meets  these  profitability  goals,  the  executive  will  receive  the
specified profitability portion of the bonus.

     In determining  the amount of the work plan bonus component to be paid, the
Committee  examines  the  executive's  individual  contribution  to  his  or her
departmental  work plan and the extent to which the departmental work plan goals
have been achieved.  The departmental  work plan goals are determined based upon
the departmental  function,  and include such items as development and marketing
of new products and programs within a specified time frame, systems enhancements
to support new  products and  programs,  improvements  in mail service  pharmacy
processing costs and enhancements in the provider networks.  The work plan bonus
for 1998 is  available  only to the  extent  that  the  Company's  overall  1998
profitability goals are achieved.

     For 1998,  actual  aggregate  bonuses paid to current  executive  officers,
including  the CEO,  represented  approximately  33% of the salaries and bonuses
paid to these officers,  which is the same level as the 1997 aggregate  bonuses.
Actual  aggregate  bonuses paid to all current  executive  officers who received
bonuses for 1998 represented  approximately  91% of the total amounts  allocated
for bonuses for these  executive  officers  and  approximately  17% of the total
bonus  amounts  paid  to all  employees  for  1998,  compared  to 94%  and  28%,
respectively, in 1997.

     In addition,  in connection  with the Company's  acquisition  of ValueRx on
April 1, 1998, the Company created an additional incentive  compensation program
for various  employees,  including  two of the executive  officers  named in the
Summary  Compensation Table (the "Named Officers"),  involved in integrating the
operations of ValueRx with the Company's  existing  operations (the "Integration
Compensation").   The  executive  officers   participating  in  the  Integration
Compensation  program  can earn a bonus award of up to 100% of their base salary
for 1998, and up to 300% of their base salary for 1999, based on the achievement
of certain  Company-wide  financial  performance  goals, such as earnings before
interest,   taxes,   depreciation  and  amortization,   as  well  as  individual
performance goals, such as departmental integration objectives. The Company-wide
financial  goals,  which  are  measured  objectively,  were  achieved  for 1998.
Individual goals were measured  subjectively,  and each participating  executive
officer achieved between 75 and 85 percent of their individual  goals.  Overall,
the executive  officers  participating in this program earned, in the aggregate,
bonus awards equaling an average of approximately 86% of their annual salary.

     During 1998, the Company began a planning process for  implementation  of a
Shareholder Value Management  incentive  compensation system (the "SVM System"),
which is a formula-based  plan that is based on the concept of "economic profit"
created by the Company,  to replace,  in whole or in part,  the existing  annual
bonus  compensation  system  described  above  beginning in 1999. The SVM System
focuses  on  after-tax  operating  profit  less a charge for  invested  capital.
Essentially,  it measures the Company's  operating profit after  subtracting all
costs  associated  with  generating  those  profits.  Bonuses  awarded will vary
directly with the amount by which after-tax operating profit exceeds the cost of
the  invested  capital.  Thus,  the SVM System  rewards  managers  who  increase
stockholder value by most effectively  deploying the capital  contributed by the
stockholders,  and places bonuses at risk if targeted economic profit levels are
not  achieved.  Consequently,  the  Committee  believes that the SVM System will
better  align   management's   incentive   compensation  with  the  creation  of
stockholder value. The details of the SVM System are still being determined.

     LONG TERM INCENTIVE  COMPENSATION:  Long-term incentive  compensation is in
the form of the Company's  employee  stock option  plans,  which are designed to
align the  executive's  incentive  compensation  more directly with  stockholder
values by  linking  compensation  to the  performance  of the  Company's  stock.
Long-term  compensation is also designed to encourage  executives to make career
commitments to the Company.  Each executive  officer  receives an initial option
grant upon employment with the Company,  and typically  receives an annual grant
of additional stock options thereafter.  The size of an executive's stock option
award is based upon the CEO's and the Committee's  subjective  evaluation of the
contribution  that the executive  officer is expected to make to overall  growth
and  profitability of the Company during the vesting period of the options.  The
Committee also considers comparable  long-term incentive  compensation levels at
the  Comparable  Companies.  In  addition,  in  connection  with  the  Company's
acquisition  of ValueRx,  the  Committee  awarded  stock  options to various key
employees,  including  four of the Named  Officers,  to  provide  an  additional
incentive in connection with the integration process.

     Stock options are granted with an exercise  price equal to the market value
on the date of grant and  constitute  compensation  only if the Company's  stock
price  increases  thereafter.  The  Committee  has  discretion  to determine the
vesting schedule for each option grant and generally has made grants that become
exercisable  in equal amounts over five years.  In general,  executives  must be
employed  by the  Company  at the time of  vesting  in order to  exercise  their
options.  Reference is made to the text of the Company's  employee  stock option
plans for detailed information on the terms of these plans.

     DEFERRED  COMPENSATION  PLAN:  In  December  1998,  the Board of  Directors
adopted the Express Scripts,  Inc.  Executive  Deferred  Compensation  Plan (the
"EDCP"), which also serves as a supplemental retirement plan for executives. The
EDCP provides eligible senior and  vice-president-level  executive  employees of
the Company and its  subsidiaries  the  opportunity to (i) defer the receipt and
taxation of up to 50% of the individual's  annual base salary and 100% of his or
her annual bonus, and (ii) receive certain annual and past-service contributions
from the Company that represent a percentage of the individual's salary and cash
bonus compensation.  Amounts deferred by participants and Company  contributions
are  assumed  to have been  invested  in any of a number  of mutual  funds and a
Company Common Stock fund. The Board adopted the EDCP and approved the Company's
annual  and  past-service   contributions   for  1999,  which  were  based  upon
percentages of the participating  executive's cash compensation  during 1998 and
during  his  or  her  tenure  as  a  senior  executive,   respectively,  at  the
recommendation  of the Committee,  which was based,  in part,  upon the study of
Comparable  Companies described above. The purpose of the EDCP is to provide key
executives with more competitive  retirement and capital accumulation  benefits,
to retain and provide incentive to the Company's key executives, and to increase
the  Company's  ability to attract  mid-career  executives  to senior  executive
positions with the Company.  Any compensation  deferred under the EDCP would not
be included in the  $1,000,000  limit  provided for under Section  162(m) of the
Internal  Revenue Code until the year in which  distributions  from the EDCP are
actually made to the  participants.  Nine of the Company's  executive  officers,
including all of the Named  Officers,  have elected to  participate in the EDCP,
beginning March 1, 1999. See "III. Proposal to Approve the Express Scripts, Inc.
Executive Deferred  Compensation Plan" for additional  information regarding the
EDCP,  including  amounts that the Company has contributed or will contribute to
participating executives' accounts during 1999.

     SEVERANCE  ARRANGEMENTS:  On  January  27,  1998,  the  Board of  Directors
authorized  the  Company  to  enter  into  severance   agreements  with  certain
executives  selected  by the  Board of  Directors,  upon  recommendation  of the
Compensation  Committee,  from time to time. Eight executives,  including all of
the  Named  Officers  other  than the  Company's  CEO,  have  entered  into such
agreements  with the Company (the CEO had previously  entered into an employment
agreement with the Company that includes a severance  agreement).  The severance
agreements  are designed  generally to encourage the  Company's  key  management
personnel  to remain with the Company  and its  subsidiaries  and to continue to
devote their full attention to the Company's business,  without distraction from
personal  uncertainties  and risks created by certain events that are not within
their  control.  The severance  agreements  are operative  only in the event the
executive's employment with the Company or any of its subsidiaries,  as the case
may be, terminates for any reason other than death, disability or "cause", or in
the event that the executive voluntarily terminates employment for "good reason"
(as such terms are defined in the agreements).  The severance benefit thereunder
generally will be an amount equal to (i) one year's salary at the rate in effect
on the date of  termination,  plus (ii) an amount  equal to the  current  year's
bonus  potential  multiplied by the average  percentage  of the bonus  potential
realized by the  executive  over the  preceding  three  years,  prorated for the
portion of the year of  termination  during which the  executive was employed by
the Company.  See "Executive  Compensation-Severance  Agreements" for additional
information regarding the severance agreements.

THE CHIEF EXECUTIVE OFFICER'S COMPENSATION

     The  Committee  evaluates  the  performance  of the  CEO  for  purposes  of
recommending to the Board his annual base pay adjustment and annual bonus award.
The  Committee  also  determines  his annual  stock  option  award.  The factors
considered  in  recommending  an increase in the CEO's salary in 1998 related to
the overall  performance of the Company,  particularly the increase in revenues,
membership, net income and earnings per share, which were subjectively evaluated
by the Committee. Another factor was the percentage increase in salary allocated
to certain senior executives of the Company in general, although this factor was
of secondary importance.

     Under his employment agreement with the Company,  during 1998 the CEO could
earn an  annual  bonus  of up to 80% of his base  salary  for  1998  based  upon
achievement of performance  objectives set by the Board upon  recommendation  of
the  Committee.  As of the  date of this  Report,  the  Committee  is  currently
negotiating the terms of a new employment  agreement with Mr. Toan,  pursuant to
which Mr. Toan would be eligible  for an annual  bonus award of 100% of his base
salary for 1999 and future periods.  Mr. Toan's bonus award for 1998 performance
was  recommended  by the Committee  based upon the  Company's  attainment of its
profitability  and enrollment goals,  which were weighted  equally,  and for his
performance of the 1998 non-financial work plan objectives that were assigned to
him. The factors used in the non-financial  work plan objectives related to such
items as the acquisition of ValueRx and  integration of its operations,  systems
and  personnel  with  those  of the  Company,  the  negotiation  of the  pending
acquisition of Diversified  Pharmaceutical  Services,  and  strengthening of the
Company's  internal  management  structure,   all  of  which  were  subjectively
weighted.

     In  December  1998,  the  Committee,  acting  jointly  with  the  Board  of
Directors, awarded the CEO additional options to acquire shares of the Company's
Class A Common Stock in view of the importance of his expected  contribution  to
the  Company's  long term  goals of  sustaining  revenue  and  earnings  growth,
increasing   market   penetration  and  improving   service   effectiveness  and
efficiency.


March 9, 1999                        COMPENSATION COMMITTEE

                                     Frederick J. Sievert, Chairman
                                     Seymour Sternberg
                                     Norman Zachary


     The  Compensation  Committee  Report  on  Executive  Compensation  and  the
performance  graph below shall not be deemed  incorporated  by  reference by any
general  statement  incorporating  by reference this Proxy Statement or portions
thereof  into any  filing  under the  Securities  Act of 1933 or the  Securities
Exchange  Act of  1934,  except  to the  extent  that the  Company  specifically
incorporates  this  information by reference,  and shall not otherwise be deemed
filed under such Acts.

COMPENSATION COMMITTEE INTERLOCKS AND INSIDER PARTICIPATION

     Mr. Sternberg is the Chairman, President and Chief Executive Officer of New
York Life; Chairman, President and Chief Executive Officer of NYLIFE HealthCare;
and, until July 1998, was a director of NYLCare,  a former  subsidiary of NYLIFE
HealthCare.  Mr.  Sievert is the Vice Chairman of New York Life and,  until July
1998,  was a director of NYLCare.  In July 1998,  New York Life sold  NYLCare to
Aetna. The Company was (and continues to be under the Aetna ownership  regime) a
party to agreements with NYLCare pursuant to which the Company provides pharmacy
benefit  management  services  to certain  group  policyholders  of NYLCare  and
various pharmacy benefit management,  informed decision counseling,  vision care
and  infusion  therapy  services to health  maintenance  organizations  owned or
managed by NYLCare.  In 1998, the Company derived  $145,758,000,  or 5.2% of its
net revenues  from  services  provided to NYLCare  while NYLCare was an indirect
subsidiary of New York Life (i.e.,  for the period  January 1 to July 15, 1998).
See  "Certain  Relationships  and  Related  Transactions"  for a  more  complete
description of this and certain other transactions involving the Company and New
York Life or its affiliates.

PERFORMANCE GRAPH

     The following  performance  graph compares the cumulative total stockholder
return of the Company's Class A Common Stock,  commencing  January 1, 1993, with
the  cumulative  total return on the Standard & Poor's Health Care 500 Index and
the Standard & Poor's 500 Index, to the end of 1998.  These indices are included
only for comparative  purposes as required by Securities and Exchange Commission
rules in effect as of the date of this Proxy  Statement  and do not  necessarily
reflect management's opinion that such indices are an appropriate measure of the
relative  performance  of the  Class A Common  Stock,  and are not  intended  to
forecast or be indicative of possible  future  performance of the Class A Common
Stock. [Performance Graph to be inserted by Printer]

                [Performance Graph, in tubular format, follows]

<TABLE>
<CAPTION>



                                                                         INDEXED RETURNS
                                                                           Years Ending
                                       Base
                                      Period
Company/Index                          Dec93        Dec94          Dec95          Dec96            Dec97           Dec98
<S>                                     <C>          <C>           <C>             <C>             <C>             <C>   
- -------------------------------------------------------------------------------------------------------------------------
EXPRESS SCRIPTS INC  -CL A               100          156.38        217.02          152.66          255.32          571.28
S&P 500 INDEX                            100          101.32        139.40          171.40          228.59          293.91
HEALTH CARE-500                         100          113.12        178.55          215.61          309.86          446.87
</TABLE>




                             EXECUTIVE COMPENSATION

     The  following  table  sets  forth  information  concerning  the annual and
long-term  compensation  for all  services  rendered  in all  capacities  to the
Company for the fiscal  years ended  December 31,  1998,  1997 and 1996,  by the
Company's  chief  executive  officer and its other four most highly  compensated
executive officers (the "Named Officers"):

<TABLE>
                           SUMMARY COMPENSATION TABLE

<CAPTION>

                                                                                        LONG-TERM
                                                                                       COMPENSATION
                                                  ANNUAL COMPENSATION                     AWARDS

                                                                                        SECURITIES
                                                                      OTHER ANNUAL      UNDERLYING         ALL OTHER
                            YEAR       SALARY($)       BONUS ($)     COMPENSATION($)    OPTIONS(#)      COMPENSATION($)
<S>                         <C>         <C>           <C>                 <C>             <C>              <C>       
- -----------------------------------------------------------------------------------------------------------------------

BARRETT A. TOAN
  PRESIDENT, CHIEF          1998        406,920(1)    308,000(1)           --              70,000(2)        304,083(3)
  EXECUTIVE OFFICER AND     1997        332,256(1)    250,000(1)           --                 28,000          2,000(4)
  DIRECTOR                  1996        290,769(1)    204,000(1)           --                 28,000          2,000(4)

STUART L. BASCOMB
  EXECUTIVE VICE            1998           258,269    134,000(5)           --              28,300(6)        222,282(7)
  PRESIDENT                 1997           210,815     95,380(5)           --                  8,200          2,000(4)
                            1996           193,877     80,000(5)           --                  8,000          2,000(4)
PATRICK J. BYRNE
  SENIOR VICE PRESIDENT     1998        138,846(8)    241,650(9)           --             33,100(10)        12,523(11)
  PLYMOUTH SITE             1997               N/A           N/A           --                    N/A               N/A
  OPERATIONS                1996               N/A           N/A           --                    N/A               N/A

DAVID A. LOWENBERG
  SENIOR VICE PRESIDENT     1998           215,961    281,776(9)           --             29,800(12)        84,517(13)
  AND DIRECTOR OF SITE      1997           150,769     63,844(5)           --                  5,100          2,000(4)
  OPERATIONS                1996           145,000     53,000(5)           --                 10,000          2,000(4)

GEORGE PAZ
  SENIOR VICE PRESIDENT     1998       240,385(14)    117,500(5)           --            124,800(15)        57,592(16)
  AND CHIEF FINANCIAL       1997               N/A           N/A           --                    N/A               N/A
  OFFICER                   1996               N/A           N/A           --                    N/A               N/A

<FN>
     (1) Represents  compensation  awarded pursuant to the employment  agreement
between  Mr. Toan and the  Company,  which  agreement  was  replaced  with a new
agreement  effective  as of  April  1,  1999  (see  "Executive  Compensation  --
Employment  Agreement") and the Company's  annual bonus plan (see Note 5 below).

     (2) Consists of 20,000 stock  options  awarded on May 27, 1998,  and 50,000
stock options  awarded on December 16, 1998.

     (3) Consists of past service credit contribution of $302,083 by the Company
under its Deferred Compensation Plan (see "III. Proposal to Approve the Deferred
Compensation  Plan" for more information),  and $2,000 matching  contribution in
connection  with the  Company's  401(k)  Plan.  

     (4) Consists of the Company's matching  contribution in connection with the
Company's  401(k) Plan. 

     (5) Consists of amounts earned pursuant to the Company's annual bonus plan.
The portion of the bonus based on each Named  Officer's  workplan  objectives is
evaluated  based on workplan  performance  from March 15 through  the  following
March 14. 

     (6) Consists of 8,000 stock  options  awarded on April 1, 1998,  and 20,300
stock options  awarded on December 16, 1998.

     (7) Consists of past service credit contribution of $220,282 by the Company
under its  Deferred  Compensation  Plan,  and $2,000  matching  contribution  in
connection  with the Company's  401(k) Plan.

     (8) Mr. Byrne joined the Company on April 1, 1998.  

     (9) Consists of amounts earned pursuant to the Company's  annual bonus plan
(see Note 5 above)  and  amounts  earned  for  integration  bonuses  awarded  in
connection  with the Company's  acquisition  of ValueRx.  

     (10) Consists of 22,000 stock options  awarded on June 6, 1998,  and 11,100
stock options awarded on December 16, 1998. 

     (11) Consists of past service credit contribution of $10,523 by the Company
under its  Deferred  Compensation  Plan,  and $2,000  matching  contribution  in
connection with the Company's 401(k) Plan. 

     (12) Consists of 10,000 stock options  awarded on April 1, 1998, and 19,800
stock options awarded on December 16, 1998.

     (13) Consists of past service credit contribution of $82,517 by the Company
under its  Deferred  Compensation  Plan,  and $2,000  matching  contribution  in
connection  with the Company's  401(k) Plan.  

     (14) Mr. Paz joined the  Company  on  January  5, 1998.  

     (15) Consists of 100,000 stock  options  awarded on January 7, 1998,  5,000
stock  options  awarded on April 1, 1998,  and 19,800 stock  options  awarded on
December 16, 1998.

     (16) Consists of past service credit contribution of $20,000 by the Company
under its Deferred  Compensation Plan, and reimbursement of relocation  expenses
of $37,592.

</FN>
</TABLE>


STOCK OPTIONS

     The table  below  sets  forth  certain  information  on the grants of stock
options to the Named Officers pursuant to the Employee Stock Option Plans during
1998.

<TABLE>
                        OPTION GRANTS IN FISCAL YEAR 1998
                                INDIVIDUAL GRANTS
<CAPTION>

                                    NUMBER OF
                                   SECURITIES      PERCENT OF TOTAL
                                   UNDERLYING       OPTIONS GRANTED                                           GRANT DATE
                                     OPTIONS        TO EMPLOYEES IN       EXERCISE          EXPIRATION       PRESENT VALUE
NAME                               GRANTED (#)      FISCAL YEAR(4)     PRICE ($/SH)(5)         DATE             ($)(6)
<S>                              <C>      <C>           <C>              <C>                <C>               <C>      
- ----                               -----------      --------------     ---------------         ----             ------
Barrett A. Toan                  20,000   (1),(2)        1.60%            $ 38.9375          05/27/08          $ 361,200
                                 50,000   (2),(3)        4.00%              55.1250          12/16/08            868,500

Stuart L. Bascomb                 8,000   (7),(8)        0.64%              42.3907          04/01/08            157.280
                                 20,300   (7),(3)        1.62%              55.1250          12/16/08            519,071

Patrick J. Byrne                 22,000   (7),(9)        1.76%              37.4375          06/06/08            382,140
                                 11,100   (7),(3)        0.89%              55.1250          12/16/08            283,827

David A. Lowenberg               10,000   (7),(8)        0.80%              42.3907          04/01/08            196,600
                                 19,800   (7),(3)        1.58%              55.1250          12/16/08            506,286

George Paz                      100,000  (7),(10)        8.00%              28.4063          01/07/08          1,318,000
                                  5,000   (7),(8)        0.40%              42.3907          04/01/08             98,300
                                 19,800   (7),(3)        1.58%              55.1250          12/16/08            506,286
<FN>
     (1) Consists of options awarded on May 27, 1998.

     (2) Such  options  are fully  exercisable  from date of grant.  The  shares
subject  to  the  options  are  restricted   from  transfer  with  the  transfer
restriction  lapsing as to 20% of such  shares on each  anniversary  date of the
date of grant. Under the terms of Mr. Toan's employment agreement,  the transfer
restriction  is subject to complete  lapse in the event of a "Change of Control"
of the  Company (as  defined in the  agreement)  or  termination  of Mr.  Toan's
employment by the Company without "Cause" (as defined in the agreement),  by Mr.
Toan for "Good  Reason"  (as  defined in the  agreement)  or by reason of death,
disability or  retirement.  Pursuant to his employment  agreement,  Mr. Toan may
also have the right to require  the  Company to purchase a portion of his shares
within 12 months after his  termination of employment  without  Cause,  for Good
Reason or upon death or disability.  See "Executive  Compensation  -- Employment
Agreement." Upon termination of Mr. Toan's employment, the Company will purchase
any shares  issued upon the exercise of the options  that remain  subject to the
transfer  restriction,  at the lesser of the option  exercise  price or the then
current market value of the Class A Common Stock.

     (3) Consists of options awarded on December 16, 1998.

     (4) Total  options  granted to employees  in fiscal year 1998  includes all
options granted to employees in 1998. 

     (5)  Represents  the  closing  price per share as reported on Nasdaq on the
date preceding the date of grant.  

     (6) Such estimated value is derived using the  Black-Scholes  method taking
into account the following key assumptions:

     (a)  volatility  of 43.24%  calculated  using  daily  stock  prices for the
24-month period prior to the grant date; (b) 0% dividend yield;  (c) an interest
rate of 5.40% which  represents  the average  interest  rate on a U.S.  Treasury
security on the applicable date of grant with a maturity date  corresponding  to
that of the option term; (d) 10-year option term; (e) an exercise price equal to
the fair market  value on the date of grant,  and (f) vesting of 20% per year on
each of the  first  five  anniversaries  of the  date of  grant.  The  resulting
Black-Scholes  value was  discounted  by  approximately  26.91% to  reflect  the
probability of a shortened option term due to termination of employment prior to
the option  expiration  date. The actual value of the options will depend on the
excess of the market price of the shares over the exercise price on the date the
options are exercised,  and may vary  significantly  from the theoretical values
estimated by the Black-Scholes model.

     (7) Become  exercisable  as to 20% of the  shares  subject to the option on
each  anniversary of the date of grant. The options shall terminate in the event
of a "change in control"  of the  Company,  whereby  the  Company  shall pay the
employee  an amount  equal to the excess of the  "change  of control  price" (as
defined in the Employee Stock Option Plans) over the exercise price thereof, for
the vested options or all options,  depending on whether an offer of "comparable
employment"  (as  defined in the  Employee  Stock  Option  Plans) is made to and
accepted by the employee.  The options  terminate upon termination of employment
unless the employee  dies,  retires or is  permanently  disabled,  or his or her
employment is terminated without cause.

     (8) Consists of options awarded on April 1, 1998.

     (9) Consists of options awarded on June 6, 1998.

     (10) Consists of options awarded on January 7, 1998.
</FN>
</TABLE>

     The Company has no plan under which it may grant stock appreciation rights.

     The table set forth below provides certain  information with respect to the
1998 fiscal  year-end value of options to purchase the Company's  Class A Common
Stock granted to the Named Officers and options exercised during such period.

<TABLE>
                   AGGREGATED OPTION EXERCISES IN FISCAL 1998
                        AND FISCAL YEAR-END OPTION VALUES

<CAPTION>

                                                                              NUMBER OF SECURITIES
                                                                             UNDERLYING UNEXERCISED    VALUE OF UNEXERCISED
                                                                             OPTIONS AT FISCAL YEAR    IN-THE-MONEY OPTIONS
                                                                                    END (#)           AT FISCAL YEAR END ($)
                            SHARES ACQUIRED ON                                    EXERCISABLE/             EXERCISABLE/
NAME                           EXERCISE (#)         VALUE REALIZED ($)(1)        UNEXERCISABLE           UNEXERCISABLE (2)
<S>                               <C>                      <C>                    <C>     <C>            <C>         <C>
- ----                           ------------         ---------------------        -------------           -----------------
Barrett A. Toan                     --                       --                    348,000/0              $14,926,375/$0
Stuart L. Bascomb                   --                       --                  44,880/64,220         $2,332,040/$2,057,834
Patrick J. Byrne                    --                       --                     0/33,100                $0/$786,325
David A. Lowenberg                  --                       --                  56,440/73,560         $3,079,293/$2,479,623
George Paz                          --                       --                    0/124,800               $0/$4,233,142

<FN>
     (1) Based on the difference between the sale price and the exercise price.

     (2) Based on  $67.125,  the  closing  price of the Class A Common  Stock as
reported on Nasdaq on December 31, 1998. On March 26, 1999, the closing price of
the Class A Common Stock was $75.50.

</FN>
</TABLE>


EMPLOYMENT AGREEMENT

     Effective as of April 1, 1999,  the Company  entered into a new  Employment
Agreement  with Mr. Toan for an initial term  extending  through March 31, 2002,
pursuant to which Mr. Toan will serve as the Company's Chief  Executive  Officer
and President  and a member of the Board of  Directors.  On April 1, 2001 and on
each April 1 thereafter,  the term of the Employment  Agreement will be extended
for an  additional  one year  unless  either  party has given the other  written
notice of  termination at least 30 days prior to such April 1, provided that the
Employment Agreement will terminate when Mr. Toan reaches age 65. The Employment
Agreement provides for an annual base salary of $650,000, subject to increase in
the discretion of the Board of Directors.  Pursuant to the Employment Agreement,
Mr. Toan is also eligible to participate in the Company's  Annual Bonus Plan for
senior  executives  and will be  eligible  for target  bonuses  thereunder  of a
minimum of 100% of his annual base salary, payment of which will depend upon the
Company  meeting  certain  targeted   financial  and  non-financial   objectives
determined  each year by the Board in its discretion.  The Employment  Agreement
replaced a previous  employment  agreement,  which would have expired no earlier
than  March 31,  2001.  In  addition  to  increases  in annual  base  salary and
potential bonus compensation,  the new Employment  Agreement includes provisions
governing the vesting of options (and restricted  shares issued upon exercise of
such options)  granted under the Employee Stock Option Plans, the termination of
Mr. Toan's  employment  and severance  benefits that differ from the  comparable
terms of his previous employment agreement.

     Pursuant to the  Employment  Agreement,  on or about May 26, 1999, Mr. Toan
will receive a one-time grant of nonqualified  options to purchase 70,000 shares
of Class A Common  Stock at an exercise  price equal to the fair market value of
Class A  Common  Stock  on the  date  of  grant.  Subject  to the  Board's  sole
discretion,  Mr. Toan will  continue to be  eligible  to receive  annual  option
grants under the Company's  Employee  Stock Option  Plans,  as determined by the
Compensation  Committee.  The Employment Agreement also provides that all of Mr.
Toan's stock options  granted under the Employee  Stock Option Plans,  including
those  granted  prior to the date of the  Employment  Agreement,  and all of Mr.
Toan's  restricted  shares  acquired  upon  exercise of such options will become
fully  vested upon (i) a "Change of Control,"  (ii)  termination  of Mr.  Toan's
employment by the Company  without  "Cause,"  (iii)  termination by Mr. Toan for
"Good Reason" and (iv) Mr. Toan's death or "Disability"(as each such capitalized
term is defined in the Employment Agreement).  Upon the occurrence of any of the
foregoing events, Mr. Toan's options will remain exercisable for 18 months after
such event (or until the expiration date of the option, if the remaining term of
the option is less than 18  months).  In  addition,  Mr. Toan may  exercise  his
vested options within 30 days after termination of his employment by the Company
for Cause or by Mr. Toan without Good Reason.

     Pursuant to Mr. Toan's previous  employment  agreement,  effective upon the
Company's  initial public  offering in June 1992,  Mr. Toan received  options to
purchase  280,000 shares of Class A Common Stock under the 1992 Plan,  which are
exercisable  at $3.25 per share,  and he has received  additional  options on an
annual basis. These options are nonqualified options and are exercisable in full
immediately.  If Mr.  Toan  exercises  any of these  options  prior to the fifth
anniversary of the date of grant, however, the shares received upon exercise, to
the extent  exceeding a number of shares  equal to the product of (x) 20% of the
number of shares  subject  to the  options,  and (y) the  number of whole  years
elapsed  since the date of grant,  will be  "restricted  shares"  and subject to
forfeiture.  A pro rata portion of the restricted  shares  received will vest on
each succeeding anniversary until the fifth anniversary after the date of grant,
provided,  however,  that, pursuant to the Employment Agreement,  the restricted
shares will vest immediately under the same  circumstances that cause any of his
options to become  fully  vested,  as  described  in the  immediately  preceding
paragraph.

     The Employment  Agreement also provides Mr. Toan the right to tender to the
Company,  within 12 months after his termination  without Cause, for Good Reason
or upon death or Disability, shares of Class A Common Stock equal to the greater
of (a) the  number of shares  subject  to  options  granted  to him  during  the
calendar year preceding such  termination or (b) 70,000 shares (with (a) and (b)
adjusted for any stock splits  occurring after the date of grant and the date of
the  Employment  Agreement,  respectively).  In such  event,  the  Company  must
repurchase such shares for the "Fair Market Value" (as defined in the Employment
Agreement)  of such  shares  as of the  date of  tender.  Under  the  Employment
Agreement,  however,  Mr.  Toan's  right to tender  such  shares will not become
effective  until and unless the Financial  Accounting  Standards  Board ("FASB")
formally adopts new accounting  rules such that such right would not require the
Company  to  use  "variable  plan   accounting"   or  similar   "mark-to-market"
accounting,  which could result in additional expense to the Company, to reflect
such right.

     If the Company  terminates Mr. Toan's employment  without Cause or Mr. Toan
terminates his employment for Good Reason, the Employment Agreement requires the
Company to pay Mr. Toan the following  amounts:  (i) three times his annual base
salary then in effect;  (ii) three times the greater of (A) his annual bonus for
the preceding calendar year or (B) his target bonus for the year of termination;
(iii) all  amounts  accrued but unpaid as of the date of  termination;  and (iv)
three  times the amount or amounts the Company  credited to Mr.  Toan's  account
under the Deferred Compensation Plan for the calendar year preceding termination
(excluding past service credits for years prior to 1999).  The Company must also
continue  Mr.  Toan's  employee  life  and  health  benefits  (except  long-term
disability  insurance  coverage)  until the earlier of (x) three years following
his termination,  (y) the date he becomes covered under another employer's plans
or (z) the last day of the month in which he reaches age 65. Among other events,
the  failure of the  Company's  stockholders  to elect Mr.  Toan to the Board of
Directors constitutes Good Reason under the Employment Agreement.

     In the event of any Change of Control that results in Mr. Toan's  liability
for the payment of an excise tax under  Section 4999 of the Code (or any similar
tax under any  federal,  state,  local or other law),  the  Company  will make a
"gross-up"  payment which, in general,  will  effectively  reimburse Mr. Toan in
full for any such excise taxes.

     Mr. Toan's  Employment  Agreement  requires that the Employee  Stock Option
Plans be amended at the Meeting in order to ensure the  effectiveness of certain
provisions of the Agreement relating to stock options granted under the Employee
Stock Option  Plans.  See "VI.  Proposal to Approve the Fourth  Amendment to the
Express  Scripts,  Inc.  Amended and Restated  1994 Stock Option Plan" and "VII.
Proposal to Approve the Second  Amendment to the Express  Scripts,  Inc. Amended
and Restated 1992 Stock Option Plan."

SEVERANCE AGREEMENTS

     On January 27, 1998, the Board of Directors authorized the Company to enter
into severance  agreements  with  executives  selected by the Board of Directors
upon recommendation of the Compensation Committee.  The severance agreements are
designed generally to encourage the Company's key management personnel to remain
with the Company  and its  subsidiaries  and to  continue  to devote  their full
attention  to  the  Company's   business   without   distraction  from  personal
uncertainties  and risks  created by certain  events  that are not within  their
control.   The  severance  agreements  are  operative  only  in  the  event  the
executive's  employment with the Company terminates for reasons discussed below.
Eight  executives,  including all of the Named Officers other than Mr. Toan, the
Company's  Chief Executive  Officer,  have entered into such agreements with the
Company.  (Mr.  Toan has entered into an employment  agreement  with the Company
that includes a severance agreement - see "Employment Agreement" above.)

     The  severance   agreements   generally  provide  that,  in  the  event  of
termination of the executive's  employment with the Company for any reason other
than  death or  disability  (as  defined in the  agreements)  and other than for
"cause" (as defined in the agreements, relating generally to acts constituting a
felony,   gross  dishonesty  or  gross  misconduct  or  willful   violations  of
obligations  to the  Company),  or in the event  that the  executive  terminates
employment for "good reason" (as defined in the agreements,  relating  generally
to breaches of the  agreement by the Company or changes in the  executive's  job
location,  title, authority,  duties,  compensation or benefits),  the executive
will be entitled to receive,  subject to certain  conditions,  a cash  severance
benefit payable in four  substantially  equal quarterly payments in an aggregate
amount equal to: (i) twelve (12) times the monthly base salary being paid to the
executive immediately prior to the date of termination plus (ii) an amount equal
to the  product of (x) the  executive's  "bonus  potential"  (as  determined  in
accordance  with the  agreements)  for the year in which the date of termination
occurs,  multiplied by (y) the average  percentage of the bonus potential earned
by the executive for the three full years  immediately  preceding  such year (or
such shorter  period if the  executive was employed by the Company for less than
three full years and  received or was  eligible  to receive a bonus  during such
period),  which  product  will  be  prorated  for  the  portion  of the  year of
termination  in which the executive was employed by the Company.  As a condition
to receiving  severance  benefits an executive must execute a release of certain
claims  against the Company  and, in specified  circumstances,  agree to certain
non-competition restrictions.  All payments will be discontinued in the event of
a breach by the executive.  Any amounts earned by the executive from  employment
with a third  party  prior to the final  payment  of amounts  payable  under the
severance  agreement  will  reduce  the  severance  benefit  due  the  executive
thereunder, except that no such reduction will be required in the event the date
of  termination  occurs  within 18 months  following a "change in  control"  (as
defined in the severance agreements).  The severance agreements also are subject
to certain arbitration provisions.  The agreements continue through December 31,
1999, and renew  automatically for additional one-year terms unless either party
provides  notice as specified in the agreements;  provided,  that the agreements
will  continue  for two years  beyond  the month in which any  change in control
occurs.

                 CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS

     Until April 1992, the Company was a direct subsidiary of NYLCare, which was
a  subsidiary  of New York Life.  In April  1992,  both the  Company and NYLCare
became direct subsidiaries of NYLIFE HealthCare, which is an indirect subsidiary
of New York Life. NYLIFE HealthCare is the beneficial owner of 15,020,000 shares
(or  100%) of the Class B Common  Stock.  On July 15,  1998,  New York Life sold
NYLCare (the  "NYLCare  Transaction")  to Aetna.  In connection  therewith,  the
Company and Aetna  amended  certain of the terms and  provisions  of a series of
agreements  between  the  Company and  NYLCare  (the  "Aetna  Amendments").  The
material  terms and  provisions of the Company's  agreement with NYLCare and the
Aetna Amendments are discussed below.

     The  Company  is  also a party  to a  series  of  agreements  with  Premier
Purchasing  Partners,  L.P.,  (formerly  known as  American  HealthCare  Systems
Purchasing  Partners,  L.P.; the  "Partnership"),  a healthcare group purchasing
organization  affiliated with Premier,  Inc.  (formerly known as APS Healthcare,
Inc.;  "Premier").  Premier is the largest voluntary  healthcare alliance in the
U.S.,  formed  as a result  of the  mergers  in late  1995 of three  predecessor
alliances,  American HealthCare  Systems,  Premier Health Alliance and SunHealth
Alliance.  The Premier alliance includes approximately 215 integrated healthcare
systems that own or operate  approximately 800 hospitals and are affiliated with
another 900 hospitals.  Mr. Norling,  who has served as a member of the Board of
Directors of the Company since March 1992, served as the Chief Operating Officer
of Premier for the period  September  1997 to September  1998, and has served as
the Chief Executive Officer of Premier since that time.

APPROVAL OF RELATED PARTY TRANSACTIONS

     In an effort to minimize  conflicts,  the Company's Bylaws require that any
material  transaction  with a related party be approved by the  Company's  Audit
Committee, which currently consists of three directors. A Bylaw provision, which
cannot be changed without the affirmative  vote of a majority of the outstanding
Class A Common  Stock,  requires  that a  majority  of  directors  on the  Audit
Committee be persons who are not directors of New York Life or its  subsidiaries
(other  than the  Company)  or  officers  or  employees  of New York Life or its
subsidiaries.  A material transaction is a transaction that, by itself, would be
required to be disclosed in the Company's  proxy  statement under the Securities
and Exchange  Commission's rules and regulations as in effect at the time of the
transaction.  In general,  under the Securities and Exchange  Commission's rules
and  regulations  as in effect on the date of this Proxy  Statement,  a material
transaction  would be any  transaction,  or series of similar  transactions,  in
which the amount involved exceeds $60,000.

RELATIONSHIP WITH NEW YORK LIFE AND NYLCARE

PHARMACY BENEFIT MANAGEMENT - INDEMNITY PLANS

     Pursuant to an agreement with New York Life,  which was assigned to NYLCare
effective January 1, 1996 (the "Indemnity Plan Agreement"), the Company provided
pharmacy benefit management services to certain group indemnity policyholders of
NYLCare  (formerly group indemnity  policyholders  of New York Life) and certain
contract holders whose health benefit plans provide indemnity style benefits for
which NYLCare  provided  administrative  services only (such  services  formerly
being  provided by New York Life).  The Indemnity Plan Agreement was amended and
restated  effective  September 1, 1995, and again amended  effective  January 1,
1997.

     Since the NYLCare  Transaction  and pursuant to the Aetna  Amendments,  the
Company has served, and will continue to serve, members of the NYLCare indemnity
programs at the contract rates in effect at the time of the NYLCare  Transaction
until such members have been converted to Aetna health insurance policies. Aetna
has,  however,   assumed   responsibility  for  most  formulary  management  and
retrospective  discount program  administration  (which are services the Company
was  performing  for  NYLCare).   The  Company  expects  Aetna  to  assume  full
responsibility  for these services during the next several  months.  The Company
previously shared with NYLCare certain retrospective discounts which the Company
received  from drug  manufacturers  with respect to these  activities  under the
Indemnity Plan Agreement. Going forward, the Company will receive a fixed amount
per  prescription  from  Aetna in lieu of its  prior  fee and  discount  sharing
arrangement  for  these  services.  The  Company  believes  the fees  and  other
financial  remuneration  received from NYLCare  pursuant to the  Indemnity  Plan
Agreement were competitive with those received from unrelated clients.

 PHARMACY BENEFIT MANAGEMENT, VISION AND INFUSION THERAPY SERVICE AGREEMENTS -
                               MANAGED CARE PLANS

     The Company  and  NYLCare  also were  parties to an  agreement  which first
became effective January 1, 1992 and was amended and restated  effective January
1, 1995 (the "Managed Care Plan Agreement").  Pursuant thereto,  the Company and
various NYLCare  subsidiaries  entered into pharmacy benefit management ("PBM"),
managed vision care ("Vision") and infusion therapy service ("Infusion Therapy")
agreements (collectively, the "Site Agreements"). The Company believes the terms
of the Managed Care Plan Agreement and the Site Agreements are no less favorable
to the Company  than the terms that could have been  obtained in an arm's length
transaction with an unaffiliated third party.  Pursuant to the Aetna Amendments,
the  Company  and  Aetna  have  agreed  to amend and  otherwise  extend  certain
provisions of the Managed Care Plan Agreement, the PBM and Infusion Therapy Site
Agreements until December 31, 2003, as more particularly described below.

  THE MANAGE CARE PLAN AGREEMENT AND THE SITE AGREEMENTS - PRE-AETNA AMENDMENTS

     Under the Managed  Care Plan  Agreement,  NYLCare  was  required to use the
Company as the  exclusive  provider of the managed  care  products  and services
provided by the Company to its clients for all health maintenance  organizations
("HMOs")  in which  NYLCare,  directly or  indirectly,  held at least a majority
interest (the "NYLCare Owned Sites"), subject to certain exceptions with respect
to Infusion Therapy services, as discussed below. In addition, NYLCare agreed to
use its best  efforts  to use the  Company  as the  exclusive  provider  of such
managed care  products  and services to any HMOs which  NYLCare did not own, but
for which it  provided  health  care  management  services,  subject  to certain
exceptions,  including  the  condition  that the prices the  Company  offered be
reasonably competitive with those available from third-party providers.

     Pursuant to the Managed Care Plan Agreement, NYLCare was required to assist
the Company in product design and promotion and in the development and promotion
of drug  formularies.  Under the PBM Site Agreement for each NYLCare Owned Site,
the Company  agreed to develop and maintain  drug  formularies  for each NYLCare
Owned Site.  Pursuant to the Managed Care Plan Agreement,  the Company agreed to
negotiate  retrospective  discounts  from drug  manufacturers  for drugs used by
members of health  plans  sponsored  by the NYLCare  Owned Sites  ("volume-based
discounts").  The first $400,000 of  volume-based  discounts were required to be
allocated to the Company and discounts in excess of that amount were required to
be  allocated  25% to the  Company  and  75% to  NYLCare,  except  that  certain
volume-based  discounts  attributable to  prescription  drug usage by members of
certain Medicare health plans sponsored by the NYLCare Owned Sites above certain
amounts were required to be allocated 50% to NYLCare and 50% to the Company. For
the  period  January  1,  1998  through  the  date of the  NYLCare  Transaction,
volume-based discounts aggregating $1,400,000 were allocated to the Company, and
volume-based discounts aggregating $6,376,000 were allocated to NYLCare.

     Under the Infusion Therapy Site Agreements for the Dallas,  Houston and the
Baltimore/Washington,  D.C.  sites,  these  sites  are not  required  to use the
Company as the exclusive  provider of Infusion  Therapy  services so long as the
Company  received,  for each  year  during  the term of the  Managed  Care  Plan
Agreement,  80% of the  aggregate  amount  that such HMO paid in the prior year,
calculated  on a member month basis,  for  non-maternity,  out-patient  Infusion
Therapy  services to all  providers  (the  "Guaranteed  Amount").  For the other
NYLCare  Owned  Sites,  once such site's total  payments  for  Infusion  Therapy
services  equaled or exceeded  $1.3 million in any year,  such site was released
from the  requirement  to use the Company as its exclusive  provider of Infusion
Therapy  services  so long as it paid  the  Company  the  applicable  Guaranteed
Amount. Under the Infusion Therapy Site Agreements,  the Company was required to
give the sites a discount for fees for these  services if the volume of services
purchased from the Company exceeded certain  thresholds in any year. The Company
also provided  Infusion  Therapy  services to three NYLCare  preferred  provider
organizations  under separate  agreements  that were  terminable by either party
upon 30 days prior written notice.

     Under the Vision Site Agreements,  the Company provided Vision services for
the Chicago, Dallas, Houston, New Jersey, New York and Baltimore/Washington D.C.
sites.

 THE MANAGED CARE PLAN AGREEMENT AND THE SITE AGREEMENTS - POST-AETNA AMENDMENTS

     Since the NYLCare  Transaction,  the Company has provided and will continue
to provide,  through  December  31,  2003,  PBM  services to  NYLCare/Aetna  HMO
members. The Company is no longer the exclusive provider of such services to all
NYLCare/Aetna HMOs; however,  the Aetna Amendments provide that the Company will
be the  exclusive  provider  of such  services  to no less than 1.4  million HMO
members during this period,  which is comparable to the NYLCare  membership base
served by the Company prior to the NYLCare Transaction.  The contract pricing in
effect prior to the NYLCare  Transaction  remains in effect through December 31,
1999, and, thereafter,  certain pricing adjustments,  which the Company believes
reflect an  appropriate  market  price,  will be  instituted.  Aetna has assumed
responsibility for most formulary development and promotion activities,  as well
as management of volume-based  discount  programs.  The Company expects Aetna to
assume full  responsibility  for these services  during the next several months.
Going  forward,  the Company will receive a fixed amount per  prescription  from
Aetna in lieu of the percentage-based  allocation  compensation method described
above for these services.

     In accordance  with the amended  Managed Care Plan Agreement and the Vision
Site  Agreements,  the Company  continues  to provide  Vision  services  for the
Chicago, Dallas, Houston, New Jersey, New York and the Baltimore/Washington D.C.
sites.  The Vision Site  Agreements  continue under the terms in effect prior to
the NYLCare Transaction through December 31, 1999.

     The  Company  is  now  the  preferred  Infusion  Therapy  provider  to  the
NYLCare/Aetna  HMO members located in the geographic areas served by the Company
at the time of the NYLCare Transaction through December 31, 2003.  Specifically,
the pricing terms of the Infusion  Therapy Site  Agreements  were extended until
December 31, 2000, and,  thereafter,  limited price  adjustments may take effect
under certain  circumstances.  A minimum annual revenue  guaranty is provided in
lieu of the Guaranteed  Amount described above. The Company continues to provide
Infusion Therapy services to NYLCare/Aetna  HMO members in the Dallas,  Houston,
New Jersey,  New York and the  Baltimore/Washington  D.C.  areas pursuant to the
amended Managed Care Plan Agreement and the Infusion Therapy Site Agreements.

     In  connection  with the Aetna  Amendments,  the  Company and New York Life
reached  an  agreement  whereby  New York  Life may make up to $2.8  million  of
transition-related  payments to the Company in 1999, depending upon the level of
profit  derived by the Company from the provision of certain  services to Aetna.
The agreement is subject to the approval of the Company's Audit Committee.

INFORMED DECISION COUNSELING SERVICE AGREEMENT

     The Company also provides informed decision  counseling services to NYLCare
HMO members and group indemnity  policyholders pursuant to an agreement dated as
of April 1,  1997.  Pursuant  to the Aetna  Amendments,  the  Company  and Aetna
extended  the term of the  agreement  through  December  31,  1999.  The Company
believes the terms of the  agreement  are no less  favorable to the Company than
the terms that could have been obtained in an arm's length  transaction  with an
unaffiliated third party.

REVENUES ATTRIBUTABLE TO NYLCARE AGREEMENTS PRIOR TO NYLCARE TRANSACTION

     For the period January 1, 1998 through July 15, 1998 (the effective date of
the NYLCare  Transaction),  the net revenues  that the Company  derived from all
services  provided to NYLCare were  approximately  $145,758,000,  or 5.2% of the
Company's total net revenues for 1998.

OTHER AGREEMENTS AND TRANSACTIONS

     The  Company and New York Life are parties to an  agreement  that  provides
that,  so  long  as New  York  Life,  directly  or  through  one or  more of its
majority-owned  subsidiaries,  owns 10% or more of the Class B Common Stock, New
York  Life  will not  engage  directly,  or  through  any of its  majority-owned
subsidiaries,  in a business that derives  substantial  revenues,  as defined in
such agreement,  from one or more of the following  activities within the United
States (the "Protected Business"):  the provision of pharmacy benefit management
services (including dispensing  prescription drugs,  monitoring cost and quality
of pharmacy services,  establishing a network of retail  pharmacies,  processing
claims for prescription drugs,  performing drug utilization review and assisting
in the  design  of  prescription  drug  programs  for  benefit  plans),  and the
provision of vision care and home infusion therapy services.  However,  New York
Life and its majority-owned  subsidiaries may engage in the following  Protected
Businesses: (i) portfolio investment activities,  without any of the entities in
which they  invest  being  subject to the  foregoing  restrictions,  (ii) claims
processing for prescription  drugs in connection with processing  medical claims
under insurance  policies,  (iii)  acquisition of entities engaged in all or any
aspect of the Protected  Business,  unless any such entity derived a majority of
its  consolidated  revenues  from  the  Protected  Business  in the  first  year
preceding  such  acquisition,  and operation of the  businesses of such acquired
entities as they may thereafter develop or expand. The foregoing does not in any
way  restrict  the  activities  of  entities  in  which  New  York  Life and its
subsidiaries  own less than a majority equity  interest.  This agreement was not
affected by the NYLCare Transaction.

     For an annual  premium of $5,800,  the Company has  obtained a $2.5 million
life insurance  policy from New York Life on the life of Mr. Toan. New York Life
maintains  Directors and  Officers/Corporation  Reimbursement  ("D&O") insurance
covering  directors  and  officers  of New York  Life and its  subsidiaries  for
certain  expenses and liabilities of such directors and officers while acting in
their  capacity  as such  while New York Life  maintains  voting  control of the
Company.  The total  amount of New York  Life's D&O  insurance  is $150  million
aggregate  corporate liability and $250 million aggregate  individual  liability
each policy period with a $10 million per loss  deductible  amount for corporate
liability and up to $50,000 per loss  deductible for individual  liability.  The
Company did not incur any annualized  premium expense for insurance covering the
first $10 million of such D&O liability  deductible for 1998 because the premium
was waived by the insurer. There is no assurance that New York Life will provide
excess D&O insurance for the Company in the future.

     From  1989,  when  NYLCare  acquired  all of the  outstanding  stock of the
Company,  through June 15, 1992, the Company was included in consolidated groups
with New York Life for  federal  income tax  purposes.  The Company is no longer
entitled by law to be included in the  consolidated tax groups and will continue
as a party to its tax allocation agreements with New York Life only for purposes
of  adjustments  to tax  liabilities  for the years in which it was  included in
those consolidated groups.

INTERCOMPANY ACCOUNT

     Prior  to  the  sale  of  NYLCare  to  Aetna,  the  Company  maintained  an
intercompany  account  for  payments to NYLCare,  which was used  primarily  for
NYLCare's  portion of the volume-based  discounts  earned by the Company,  which
were  approximately  $7,257,000 for the period January 1, 1998 to July 15, 1998.
The  highest  outstanding  balance  at any  one  time  during  this  period  was
approximately $8,466,000.

RELATIONSHIP WITH THE PARTNERSHIP AND PREMIER

     On December 31, 1995, the Company  entered into a series of agreements with
the Partnership,  which, among other things,  designate the Company as Premier's
exclusive  preferred  provider of  outpatient  PBM services to  shareholders  of
Premier and their  affiliated  healthcare  entities,  plans and facilities which
participate  in  the  Partnership's   purchasing  programs.   The  term  of  the
relationship  is ten years,  subject to early  termination by the Partnership at
five years upon payment of an early  termination fee to the Company.  Premier is
required  to  promote  the  Company  as  the   preferred  PBM  provider  to  its
shareholders and their  affiliates.  An individual  Premier member or affiliated
managed  care  plan is not  required  to  enter  into a PBM  agreement  with the
Company, but if it does so, the term of the agreement will be five years.

     As a result of the number of Premier plan members that receive PBM services
from the Company and the outcome of certain joint drug  purchasing  initiatives,
the Company issued 454,546 shares of its Class A Common Stock to the Partnership
in May 1996.  The  Partnership  could also  become  entitled to receive up to an
additional   4,500,000   shares,   depending   on  the   number  of  members  in
Premier-affiliated  managed  care  plans that  contract  for the  Company's  PBM
services;  however,  no  additional  shares  have been  granted to date.  If the
Partnership earns stock totaling over 5% of the Company's total voting stock, it
is  entitled  to have  its  designee  nominated  for  election  to the  Board of
Directors. To date, the 5% threshold has not been met.

     For the year ended  December  31, 1998,  the net revenues  that the Company
derived from  services  provided to the Premier  affiliates  were  approximately
$78,539,000, or 2.8% of total net revenues for such period. The Company does not
derive any revenue from Premier or the  Partnership.  As of January 1, 1999, the
Company   was   providing   service  to  29  Premier   affiliates   representing
approximately 1.3 million members.

                II. PROPOSAL TO APPROVE THE EXPRESS SCRIPTS, INC.
                          EMPLOYEE STOCK PURCHASE PLAN

     On November 24, 1998, the Board of Directors  adopted the Express  Scripts,
Inc. Employee Stock Purchase Plan (the "ESPP"), subject to stockholder approval.
The  purpose  of the  ESPP  is to  provide  employees  of the  Company  and  its
designated  subsidiaries with an opportunity to purchase Class A Common Stock of
the Company through  accumulated  payroll deductions during the offering periods
under the ESPP.  The ESPP is intended to qualify as an "Employee  Stock Purchase
Plan" under  Section 423 of the Internal  Revenue Code of 1986,  as amended (the
"Code").  No  shares of Class A Common  Stock  may be  issued or sold  until the
Company's  stockholders  have approved the ESPP. NYLIFE HealthCare has indicated
its  intention  to vote its shares for  approval  of the ESPP.  Assuming  NYLIFE
HealthCare  votes in favor of the ESPP, such vote would be sufficient to approve
the ESPP. If such approval is not obtained  prior to November 24, 1999, the ESPP
will be void and of no effect, and amounts withheld from participating employees
will be returned to them.

SUMMARY OF THE ESPP

     The  full  text of the  ESPP  is set  forth  in  Exhibit  A to  this  Proxy
Statement.  The  following  summary  of the  material  features  of the  ESPP is
qualified in its entirety by reference to the text of the ESPP.

     The ESPP is administered by the Board of Directors, or a committee named by
the Board of Directors.  The Board of Directors has designated the  Compensation
Committee as the committee  responsible  for the  administration  of the ESPP. A
total of 250,000  shares of Class A Common Stock have been reserved for issuance
under the ESPP,  subject to  antidilution  adjustments  as provided in the ESPP.
These  shares may be newly issued or may be purchased in the open market or from
private sources. The ESPP will terminate on November 24, 2008.

     The  committee  responsible  for the  administration  of the  ESPP  has the
authority  to (i) adopt,  amend,  and rescind  any rules  deemed  desirable  and
appropriate for the  administration  of the ESPP and not  inconsistent  with the
ESPP,   (ii)  construe  and  interpret  the  ESPP,  and  (iii)  make  all  other
determinations  necessary or advisable for the  administration  of the ESPP. The
Board of  Directors  may amend or terminate  the ESPP at any time in  accordance
with the terms of the ESPP. However,  stockholder  approval will be required for
any amendment  that  increases the maximum  number of shares  issuable under the
ESPP or if such  approval is otherwise  necessary  under any  applicable  law or
regulation.

     Employees, other than executives of the Company (as determined by the Board
or its committee),  who are customarily  employed by the Company or a designated
subsidiary at least 20 hours per week and more than five months per year and who
have been continuously employed by the Company or a designated subsidiary for at
least three months are eligible to participate in the ESPP.  Approximately 2,800
employees are eligible to participate in the ESPP. None of the Named Officers is
eligible to participate in the ESPP.

     Employees  may enroll in the ESPP at least  five days prior to a  six-month
"Offering Period" (as defined in the ESPP), which begin on March 1 and September
1 of each year. Upon enrolling in the ESPP,  each  participant is deemed to have
authorized  the  establishment  of a  brokerage  account in his or her name at a
securities  brokerage firm. The brokerage firm serves as the custodial agent for
the purpose of holding shares purchased under the ESPP. Participants in the ESPP
may elect to have  payroll  deductions  made each pay period  during an Offering
Period in an amount not less than one percent (1%) and not more than ten percent
(10%),  in whole  percentages,  of such  participant's  compensation in each pay
period.  All payroll deductions made by a participant are credited to his or her
brokerage  account. A participant may increase or decrease payroll deductions at
any  time;  however,  he or she may not make any  additional  payments  into the
participant's  brokerage  account.  The ESPP also places  certain  limits on the
participant's  ability to make  contributions  to the ESPP that might jeopardize
the ESPP's status as an "Employee  Stock Purchase Plan" under Section 423 of the
Code.

     On the first  business day of each Offering  Period,  each  participant  is
deemed to have been granted an option to purchase shares of Class A Common Stock
at the end of the Offering Period. The purchase price is 85% of the closing sale
price of the  Class A Common  Stock on  Nasdaq on the  trading  day  immediately
preceding  the  last day of the  Offering  Period.  The  first  Offering  Period
commenced on March 1, 1999. Subject to stockholder approval,  the first purchase
date will occur on August 31,  1999.  Participants  must hold  shares  purchased
under the ESPP for at least six months.

     No  participant  may purchase  more than 1,000  shares  during any Offering
Period.  Furthermore,  a  participant  may not be  granted  an option  during an
Offering Period:

     if, as a result,  the participant  would own stock and/or hold  outstanding
options to purchase  stock  representing  five percent (5%) or more of the total
combined  voting power or value of all classes of stock of the Company or of any
subsidiary,  or if such option would permit his or her rights to purchase  stock
under all employee stock purchase plans of the Company and its  subsidiaries  to
accrue at a rate which  exceeds  $25,000  of fair  market  value of such  stock,
determined  at the time such option is granted,  for each calendar year in which
such option is outstanding at any time.

     Options  granted  during  an  Offering  Period  vest on the last day of the
Offering  Period and,  unless a participant  withdraws from the ESPP, his or her
option for the purchase of shares will be exercised  automatically upon vesting.
Upon exercise, the maximum whole number of shares subject to such option will be
purchased at the applicable  option price with the accumulated  contributions in
each participant's brokerage account, subject to the limitations in the ESPP.

     A  participant  may  withdraw  all but not less than all the  contributions
credited  to his or her  brokerage  account  under the ESPP at any time prior to
five  business  days  before  the last day of the  Offering  Period.  All of the
participant's contributions credited to his or her account will be repaid to him
or her,  and no further  contributions  for the  purchase of shares will be made
during that Offering  Period.  A participant  who has withdrawn may re-enroll in
the next Offering Period.

FEDERAL INCOME TAX CONSEQUENCES

     The ESPP is intended to qualify as an "Employee  Stock Purchase Plan" under
Section 423 of the Internal Revenue Code of 1986, as amended.

     A  participating  employee  is not taxed at the time of the grant of his or
her stock.  The employee is not taxed when shares are purchased  under the ESPP,
even though they are purchased at 85% of the market price on the purchase date.

     If shares are sold after the expiration of two years or more from the first
day of the Offering  Period in which such shares were  purchased  under the ESPP
(the "Grant Date") and one year or more from the purchase date (i) any profit up
to 15% of the market value of the shares at the beginning of the Offering Period
is taxable as ordinary  income,  (ii) any further profit is taxable as long-term
capital gain,  and (iii) any loss is treated as long-term  capital loss.  Shares
sold or otherwise disposed of, including by way of gifts,  before the expiration
of two years  from  Grant  Date or one year or more from the  purchase  date are
considered disqualifying dispositions.  If the employee disposes of shares prior
to the expiration of two years from the Grant Date or prior to the expiration of
one year from the purchase date (A) the difference between the price paid by the
employee and the market value of the shares at the date of purchase (on the date
preceding the date of determination) is taxable as ordinary income,  and (B) the
difference  between the amount received by the employee upon  disposition of the
shares and the market  value of the shares at the date of purchase is treated as
a capital gain or loss  (long-term  capital gain or loss if the shares have been
held more than one year).

     If the  employee  makes a gift or  otherwise  disposes of his or her shares
within  two years of the  Grant  Date or one year from the  purchase  date,  the
difference  between the price paid by the  employee  and the market value of the
shares at the date of purchase  is taxed as  ordinary  income in the year of the
disposition.  A disposition  after these time frames may also result in tax, but
the amount of the  discount  taxed as  ordinary  income is limited to the extent
that the market value at the time of disposition exceeds the purchase price.

     In the  event  of a  participant's  death  prior  to  disposing  of  shares
purchased  under the ESPP, the tax return for the year of death must include the
discount on the  purchase  as  ordinary  income (but not more than the amount by
which the market value at death exceeds the purchase price).

     The  amount  that a  participant  elects to have  deducted  from his or her
compensation for the purchase of Common Stock under the ESPP constitutes taxable
wages  and  is  subject  to  withholding.  Moreover,  the  Company  may  have  a
withholding  obligation with respect to ordinary  compensation income recognized
by a  participant  upon making a  disqualifying  disposition.  The Company  will
require any affected  employee to make  arrangements  to satisfy any withholding
obligation.

     The Company is not subject to any tax  consequences  due to the offering of
Common Stock under the ESPP. Moreover, in general, the Company is not subject to
any tax  consequences  due to the purchase or the sale of Common Stock  acquired
under the ESPP.  However,  the Company  will be  entitled to a  business-expense
deduction  with  respect to any ordinary  compensation  income  recognized  by a
participant upon making a disqualifying disposition.  Any such deduction will be
subject to the limitations of Section 162(m) of the Code.

     The  foregoing  is a summary  of the  Federal  income tax  consequences  to
participants in the ESPP and to the Company, based upon current income tax laws,
regulations and rulings.

     Participation in and amount of payroll deductions under the ESPP are at the
election of the eligible employee.  Accordingly,  the dollar value and number of
shares that may be granted are not determinable.

     Approval of this proposal  requires the  affirmative  vote of a majority of
the votes of shares  present,  in person or by proxy,  and entitled to vote at a
meeting  of  the   stockholders  of  the  Company  voting  as  a  single  class.
Accordingly,  abstentions  will have the effect of votes against this  proposal,
and  non-votes  will be  disregarded  and have no effect on the  outcome of this
proposal.

     THE BOARD OF  DIRECTORS  RECOMMENDS  A VOTE FOR THE APPROVAL OF THE EXPRESS
SCRIPTS, INC. EMPLOYEE STOCK PURCHASE PLAN.


               III. PROPOSAL TO APPROVE THE EXPRESS SCRIPTS, INC.
                      EXECUTIVE DEFERRED COMPENSATION PLAN

     On December 16, 1998, the Compensation  Committee of the Board of Directors
(the  "Committee")  adopted,  and on  January  27,  1999 the Board of  Directors
ratified and approved, the Express Scripts, Inc. Executive Deferred Compensation
Plan (the "Deferred  Compensation Plan").  Subject to stockholder approval,  the
Board of Directors  reserved  50,000  shares of Class A Common Stock that may be
issued  under the  Deferred  Compensation  Plan.  The  purpose  of the  Deferred
Compensation  Plan is to provide  eligible key  employees of the Company with an
opportunity  to defer  compensation  to be earned by them from the  Company as a
means of saving for  retirement  or other  future  purposes  and to provide such
employees with  competitive  retirement and capital  accumulation  benefits.  In
addition,  the Deferred  Compensation  Plan is intended to provide  eligible key
employees  additional incentive to remain employed by the Company and to attract
certain executive-level employees.

     The  Deferred  Compensation  Plan  is  being  submitted  to  the  Company's
stockholders for approval to comply with Nasdaq  requirements for the listing of
the  shares of Class A Common  Stock that may be issued  under the Plan.  NYLIFE
HealthCare  has  indicated  its intention to vote its shares for approval of the
Deferred  Compensation  Plan.  Assuming NYLIFE  HealthCare votes in favor of the
Deferred  Compensation  Plan, such vote would be sufficient to approve the Plan.
If the stockholders do not approve the Deferred  Compensation Plan, the Plan, as
adopted  by the  Board of  Directors  and  except  with  respect  to  provisions
governing the  distribution  of shares of Class A Common  Stock,  will remain in
effect. In such event, the Company will distribute participants'  investments in
the Company's common stock fund under the Deferred  Compensation Plan in cash in
lieu of shares of Class A Common Stock at the times the participant elects under
the Plan.

SUMMARY OF THE DEFERRED COMPENSATION PLAN

     The full text of the Deferred  Compensation  Plan is set forth in Exhibit B
to this Proxy Statement.  The following  summary of the material features of the
Deferred Compensation Plan is qualified in its entirety by reference to the text
of the Plan.

     Unless the Committee  terminates the plan, the Deferred  Compensation Plan,
as amended from time to time, will continue in effect indefinitely.

     Subject to stockholder  approval,  the Company may distribute  newly issued
shares of Class A Common Stock or treasury shares in lieu of newly issued shares
under the Deferred Compensation Plan.

     Only senior and vice-president level executives designated by the Committee
are eligible to  participate in the Deferred  Compensation  Plan. As of March 1,
1999, the date on which  participating  executives  could begin their  voluntary
deferrals,  nine executives,  all of whom were  participating,  were eligible to
participate in the Deferred  Compensation  Plan.  Participation  is the Deferred
Compensation Plan is voluntary.

     Under the Deferred  Compensation Plan,  eligible executive employees of the
Company  may  elect to defer up to 50% of their  base  salary  and 100% of their
bonus  compensation and may receive  additional  contributions from the Company.
The participant's  plan account is credited or debited at the end of each month,
with  voluntary  deferrals  invested  in, and with income or loss based upon,  a
hypothetical  investment in any one or more investment  options  available under
the Deferred  Compensation  Plan, as prescribed  by the  Committee.  One of such
options  includes a fund comprised solely of hypothetical  equivalent  shares of
Class A Common  Stock.  At the end of each plan year,  the Company,  at the sole
discretion  of the  Committee,  may  credit to a  participant's  plan  account a
percentage  of his or her total  annual cash  compensation  (annual  salary plus
annual  executive bonus plan payment) for that year. For the plan year beginning
January  1, 1999,  the  Company  will  credit to the  participating  executives'
accounts  six  percent  (6%) of the  respective  executive's  total  annual cash
compensation  during 1999.  The  Committee  may decide to preserve,  increase or
decrease  such  percentage  or  forego  any  annual  Company   contributions  in
subsequent years.

     Upon an executive's  becoming eligible to participate,  the Company, at the
sole  discretion  of the  Committee,  may also make a  one-time  credit for past
service with the Company.  For those currently  participating,  the past service
credit  was  deemed  to  have  been  made  as of  January  1,  1999  and  equals
approximately  eight  percent  (8%) of the  participant's  total salary and cash
bonus compensation for each year in which he or she served in a senior executive
capacity  with the  Company,  plus  estimated  earnings on such amounts of eight
percent (8%) per year through March 31, 1999.  After March 31, 1999 (or the date
of  crediting  of the past  service  credit,  for  executives  who later  become
eligible to participate and receive a past service contribution),  the return on
past service credit amount will be determined  solely by the  performance of the
funds in which the participant invests portions or all of such amount.

     Annual Company  contributions for a specific plan year vest three (3) years
after  the end of that  plan  year.  Fifty  percent  (50%) of the  past  service
contribution  is vested  when it is  credited to a  participant's  account.  The
remaining fifty percent (50%) of the past service contribution vests as follows:

     -one (1) year after the end of the plan year in which the  contribution  is
credited to the participant's  account,  the participant will be one-third (1/3)
vested in the remaining fifty percent (50%);

     -two (2) years after the end of the plan year in which the  contribution is
credited, the participant will be two-thirds (2/3) vested in the remaining fifty
percent (50%); and

     -three (3) years  after the end of the plan year in which the  contribution
is credited,  the participant will be 100% vested in the remaining fifty percent
(50%).

     In any event,  participants  become fully vested in annual and past service
Company  contributions  upon  reaching  age  57.  However,  if  a  participant's
employment is terminated  prior to age 57, unvested  benefits will be forfeited.
Also,  upon a  participant's  retirement or termination of his or her employment
with the Company,  the Company may withhold  payment of vested and unvested past
service and annual  Company  contributions,  plus any earnings  thereon,  in the
event  the  Committee   determines   that  the   participant  has  violated  any
noncompetition,   nondisclosure,   or  employment   agreement  executed  by  the
participant or otherwise acted against the Company's interests.

     The  Deferred  Compensation  Plan is  administered  by the  Committee.  The
Committee is vested with the power and authority to:

     -select which executives are eligible to participate in the Plan;

     -select compensation eligible for deferral;

     -select investment indices;

     -establish the level of Company credits;

     -establish deferral terms and conditions;

     -receive and approve beneficiary designation forms; and

     -adopt  modifications,  amendments and procedures as it may deem necessary,
appropriate or convenient.

     The Committee may amend, alter or terminate the Deferred  Compensation Plan
at any  time  without  the  prior  approval  of the  Board of  Directors  or the
Company's stockholders, provided, however, that the Committee may not materially
increase  the benefits  accruing to  participants  under the Plan without  Board
approval.

     The   Committee,   in  its  sole   discretion,   may  delegate   day-to-day
administration of the Deferred  Compensation Plan to an employee or employees of
the  Company  or  to  a  third-party  administrator  and  may  rely  on  outside
consultants  and  advisors in  fulfilling  its  administrative  duties under the
Deferred Compensation Plan.

     Distributions  to a participant  are made in the time and manner elected by
the participant in his or her initial and annual  election  forms,  which permit
either  lump-sum or annual  installment  payments.  The Company will  distribute
participants'  account balances in cash;  however, if this proposal is approved,
the Company,  subject to certain  restrictions  under the Deferred  Compensation
Plan, will distribute to participants  amounts invested in the common stock fund
in the form of shares of Class A Common Stock. The Committee,  upon receipt of a
written  request  by  a  participant,  may  also  allow  certain  payments  to a
participant  while  a  participant  is  still   participating  in  the  Deferred
Compensation  Plan  to the  extent  necessary  to  abate  financial  or  medical
hardship.

     The following  table sets forth the benefits or amounts that were allocated
as of  January  1,  1999,  to each of the Named  Officers  who have  elected  to
participate  in the Deferred  Compensation  Plan.  Benefits to be awarded in the
future under the Deferred  Compensation  Plan are not determinable  because such
benefits  depend upon the amount of  compensation  each  participating  employee
elects to defer and the  percentage  of  compensation  that the Company,  at its
discretion, may contribute to each employee as a Company contribution.

<TABLE>

                                NEW PLAN BENEFITS
<CAPTION>
                      EXECUTIVE DEFERRED COMPENSATION PLAN
            NAME AND POSITION                          DOLLAR VALUE (1)                        NUMBER OF SHARES (2)
<S>                                                        <C>                                        <C>  
            -----------------                          ----------------                        --------------------
BARRETT A. TOAN                                            $302,083                                   1,125
PRESIDENT, CHIEF EXECUTIVE OFFICER AND
DIRECTOR
STUART L. BASCOMB                                          $220,282                                    820
EXECUTIVE VICE PRESIDENT
PATRICK J. BYRNE                                           $10,523                                      39
SENIOR VICE PRESIDENT PLYMOUTH SITE
OPERATION
DAVID A. LOWENBERG                                         $82,517                                     307
SENIOR VICE PRESIDENT AND DIRECTOR OF
SITE OPERATIONS
GEORGE PAZ                                                 $20,000                                      74
SENIOR VICE PRESIDENT AND CHIEF
FINANCIAL OFFICER
Executive Officer Group (3)                                $786,565                                   2,929
Non-Executive Officer Director Group (4)                     --                                        --
Non-Executive Officer Employee Group (5)                     --                                        --

<FN>
     (1) Represents the Company's entire  obligation (both vested and non-vested
component) for the past service credit as of January 1, 1999.

     (2) Represents the estimated  number of shares (both vested and non-vested)
as of  January  1,  1999,  using the  December  31,  1998  closing  price of the
Company's Class A Common Stock as reported on Nasdaq, of $67.125 per share.

     (3) Consists of nine persons.

     (4)  Directors  who  are  not  executive   officers  are  not  eligible  to
participate in the Deferred Compensation Plan.

     (5)  Employees  who  are  not  executive   officers  are  not  eligible  to
participate in the Deferred Compensation Plan.

</FN>
</TABLE>

     Approval of this proposal  requires the  affirmative  vote of a majority of
the votes of shares  present,  in person or by proxy,  and entitled to vote at a
meeting  of  the   stockholders  of  the  Company  voting  as  a  single  class.
Accordingly,  abstentions  will have the effect of votes against this  proposal,
and  non-votes  will be  disregarded  and have no effect on the  outcome of this
proposal.

     THE BOARD OF  DIRECTORS  RECOMMENDS  A VOTE FOR THE APPROVAL OF THE EXPRESS
SCRIPTS, INC. EXECUTIVE DEFERRED COMPENSATION PLAN.


               IV. PROPOSAL TO APPROVE THE THIRD AMENDMENT TO THE
        EXPRESS SCRIPTS, INC. AMENDED AND RESTATED 1994 STOCK OPTION PLAN

BACKGROUND

     On June 6, 1994,  the Board of  Directors  of the Company  adopted the 1994
Stock Option Plan,  which provides for the grant of  nonqualified  stock options
and incentive  stock options  (within the meaning of Section 422 of the Code) to
certain officers and other key employees of the Company or certain subsidiaries.
On March 22, 1995, the Board of Directors  adopted the Amended and Restated 1994
Stock Option Plan (the "1994 Plan"),  which was approved by the  stockholders of
the Company on May 24, 1995. The 1994 Plan was amended by the Board of Directors
on January 29, 1997, and January 27, 1998, and approved by the  stockholders  of
the Company on May 28,  1997,  and May 27, 1998,  respectively,  to increase the
number of shares of Class A Common  Stock  which may be issued  thereunder.  The
purposes of the 1994 Plan are to further the growth,  development  and financial
success of the Company by providing  incentives to those  officers and other key
employees who have the capacity for  contributing in substantial  measure toward
the  growth  and  profitability  of the  Company  and to assist  the  Company in
attracting and retaining employees with the ability to make such contributions.

     On March 24, 1999, the Board of Directors  adopted an amendment to the 1994
Plan  (the  "Third   Amendment")   which  is  described  below  under  "Proposed
Amendment." NYLIFE HealthCare has indicated its intention to vote its shares for
approval of the Third  Amendment.  Assuming NYLIFE  HealthCare votes in favor of
such amendment,  such vote would be sufficient to approve such amendment. If the
Third  Amendment  to the 1994 Plan is not  approved,  the  existing  plan  would
continue in effect.

SUMMARY OF THE 1994 PLAN

     The  following  summary  of the  material  features  of the  1994  Plan  is
qualified in its entirety by reference to the text of the 1994 Plan.

     GENERAL.  The 1994 Plan is administered by the Compensation  Committee (the
"Committee").  A total of  1,920,000  shares of Class A Common  Stock  have been
reserved  for grants of options  under the 1994  Plan,  subject to  antidilution
adjustments  as provided  in the 1994 Plan and a proposed  increase in the total
number of shares  available for grant, as described below. The maximum number of
shares issuable under the 1994 Plan is subject to adjustment by the Committee in
the event of certain  changes in the  Company's  shares of Class A Common Stock,
including  stock  splits.  The foregoing  share  numbers  reflect the 1998 Stock
Split. As of March 1, 1999, options to purchase an aggregate of 1,820,862 shares
of Class A Common Stock have been granted  under the 1994 Plan to 205  employees
of the Company,  leaving  99,138  shares of Class A Common Stock  available  for
grants under the 1994 Plan.  No more than 300,000  options may be granted to any
one  individual  under the 1994 Plan.  Options have been granted to 226 officers
and other key employees  from time to time under the 1994 Plan, 21 of which have
forfeited their  unexercised  options upon  termination of their employment with
the Company.  Approximately 225 employees are currently  eligible to participate
in the 1994 Plan.

     The Committee has the power to interpret the 1994 Plan and to determine and
interpret  the terms of each option  agreement  (which  need not be  identical),
including,  without  limitation,  (i) which  eligible  employees will be granted
options, (ii) the number of options that will be granted to an employee (subject
to the limitations set forth in the 1994 Plan), (iii) whether or not the options
granted are incentive  stock options or  nonqualified  stock  options,  (iv) the
exercise price of the options, (v) the form of consideration that may be used to
pay for the shares  issued upon  exercise of an option,  and (vi) when an option
will vest or become  exercisable,  and  whether  and to what  extent  the shares
received  upon exercise will be  "restricted  shares" for a period of time,  and
subject to forfeiture.

     DURATION OF PLAN,  OPTIONS.  The 1994 Plan will  terminate on June 6, 2004.
The term of each option shall be no longer than ten years from the date of grant
(five years in the case of an incentive  stock option  granted to an  individual
who is a 10% stockholder).

     OPTION TERMS.  The exercise price of an option may not be less than 100% of
the fair market value of the Class A Common Stock at the time of the grant (110%
of the fair market value in the case of an incentive  stock option granted to an
individual who at the time of grant beneficially owns more than 10% of the total
combined  voting  power  of  all  classes  of  stock  of  the  Company  (a  "10%
stockholder")).  Such fair market value shall  generally be considered to be the
closing  sale price per share on Nasdaq on the last  trading day  preceding  the
date of grant.  The  purchase  price is to be paid in cash,  by check or, at the
discretion of the Committee and upon such terms as the Committee may approve, by
delivering  previously  owned  shares,  having  shares  withheld  or  exercising
pursuant to a "cashless exercise" procedure, or any combination thereof.

     At the time of exercise of a  nonqualified  stock  option,  the optionee is
required  to  pay to the  Company,  or  make  arrangements  satisfactory  to the
Committee  regarding the payment of, any taxes required to be withheld by reason
of such  exercise.  The  Committee may permit  optionees to satisfy  withholding
obligations by delivering  previously owned shares or by electing to have shares
withheld.

     Options  are not  transferable  other  than by will or  under  the  laws of
descent  and  distribution,  and are  exercisable  during  the  lifetime  of the
optionee only by the optionee or his or her guardian or legal representative.

     Subject to the "change in control" provision referred to below, all options
terminate  immediately in the event of termination of employment for any reason,
except as follows:  if such  employment  is terminated  due to death,  permanent
disability  (as  defined in the 1994 Plan),  retirement  (as defined in the 1994
Plan),  or by the  Company  without  cause (as  defined in the 1994  Plan),  all
outstanding   options  will  immediately  become  exercisable  and  will  remain
exercisable  for three months  following such  termination;  provided,  that the
Committee may, in its  discretion,  permit the option to be exercised after such
period.  In no event,  however,  may an option be exercised  beyond the original
term of such option.  The Committee also has the discretion to determine whether
and to what extent unvested  restricted shares will vest or be forfeited upon an
optionee's termination of employment.

     If an option  expires or terminates  without having been exercised in full,
or any restricted shares received upon exercise of an option are forfeited, such
shares will again be available for grant of options.

     ADJUSTMENT OF SHARES.  In the event that the outstanding  shares of Class A
Common  Stock are changed into or  exchanged  for a different  number or kind of
shares or other securities of the Company, or of another corporation,  by reason
of reorganization, merger or other subdivision, consolidation, recapitalization,
reclassification,  stock split,  issuance of warrants or rights, stock dividend,
combination of shares or similar event,  appropriate adjustments will be made by
the  Committee  in the  number  and kind of shares  subject  to and which may be
subject to options  under the 1994 Plan,  and the purchase  price per share,  to
prevent  dilution or  enlargement  of benefits  granted  to, or  available  for,
optionees.

     VESTING AND CHANGE OF CONTROL  PROVISIONS.  The Committee has the authority
to determine the vesting  schedule of options  granted under the 1994 Plan,  and
may  accelerate  the  exercisability  of  any  option,  or  the  vesting  of any
restricted shares, at any time. Options granted under the 1994 Plan prior to the
amendment  and  restatement  thereof  in  1995  become  fully  exercisable,  and
restricted  shares will fully vest, upon the occurrence of a "change in control"
of the Company,  which, for purposes of such option grants, means the occurrence
of any of  the  following  events  at a time  when  New  York  Life  is not  the
beneficial  owner of fifty percent or more of the combined  voting power for the
election of directors of the Company:  (i) any person (other than the Company or
any parent  corporation or subsidiary or related  employee benefit plan) becomes
the  beneficial  owner of securities  representing  fifty percent or more of the
combined  voting power for the  election of  directors  of the  Company;  (ii) a
change in the  majority  of the  members  of the Board of  Directors  during any
period  of two  consecutive  years  that is not  approved  by a vote of at least
two-thirds of the members of the Board who were members at the beginning of such
two-year  period;  (iii) the  stockholders  of the  Company  approve a merger or
consolidation involving the Company that results in existing stockholders owning
80% or less of the combined voting power of the voting securities of the Company
after such merger or  consolidation,  other than a  recapitalization  or similar
transaction  in which no  "person"  acquires  more  than  fifty  percent  of the
combined voting power for the election of directors; or (iv) the stockholders of
the Company approve a plan of complete liquidation or an agreement providing for
the sale or disposition of all or  substantially  all of the Company's assets or
any transaction having a similar effect.

     With respect to all other options granted under the 1994 Plan, in the event
of a "change in control," all  outstanding  options,  whether or not  previously
exercisable  and  vested,  will  terminate  and any  restricted  shares  will be
redeemed by the Company and, in either case, the Company will pay the optionee a
specified  amount in lieu of such  options or  restricted  shares.  For  options
granted  after the 1994 Plan was  amended  and  restated,  the term  "change  in
control" means the occurrence of one of the following events: (i) the first date
on which both of the following  conditions  shall exist: (A) New York Life shall
have ceased to be the ultimate beneficial owner of securities representing fifty
percent or more of the combined voting power for the election of directors,  and
(B) a person (other than the Company or any parent  corporation or subsidiary or
related  employee  benefit  plan)  becomes the  beneficial  owner of  securities
representing fifty percent or more of the combined voting power for the election
of directors of the Company; (ii) the stockholders of the Company approve a plan
of complete liquidation of the Company; or (iii) the stockholders of the Company
approve an agreement for the sale or disposition of all or substantially  all of
the  Company's  assets  or any  transaction  having a similar  effect.  Upon the
occurrence  of such a change of  control,  the Company  will pay the  optionee a
specified amount in lieu of such options or restricted  shares,  and such amount
will be determined  based upon whether an offer of  "comparable  employment"  is
made to and accepted by the optionee. For purposes of the foregoing, "comparable
employment"  means  employment  with the  Company or its  successor  following a
change in control  pursuant  to which (i) the  employee's  responsibilities  and
duties  are  substantially  the same  and the  other  terms  and  conditions  of
employment  are  not  materially  more  burdensome;  (ii)  his or her  aggregate
compensation is  substantially  the same; and (iii) the employee is not required
to  relocate  unless  the  Company  or its  successor  pays  the  cost  of  such
relocation,  appropriate  cost of living  adjustments  are made, the employee is
employed under a written  contract for a term of not less than three years,  and
the employee is required to make only one such move during the first three years
of the written  contract.  If an  optionee  is offered  and  accepts  comparable
employment,  then the Company  would pay, in the case of options,  the excess of
the "change in control  price" (as  defined in the 1994 Plan) over the  purchase
price for the option  shares and the  change in  control  price,  in the case of
restricted shares. If an optionee is offered and rejects comparable  employment,
then the  optionee  would  receive the same  payment for his or her options that
were fully vested  immediately prior to the "change in control date" (as defined
in the 1994 Plan) and would receive the lesser of the change in control price or
the purchase price for his or her restricted shares.

     The 1994 Plan also  provides for the  reduction of any payments that may be
characterized  as "excess  parachute  payments"  (within  the meaning of Section
280G(b)(1)  of the  Code) to an  optionee  under  the Plan and any  other  plan,
program or  arrangement  maintained by the Company (or a subsidiary or parent of
the Company) so that the present value of the total  parachute  payments  equals
$1.00 less than three times the optionee's  "base amount" (within the meaning of
Section 280G(b)(2)(A) of the Code).

     AMENDMENT AND  TERMINATION  OF PLAN. The Board of Directors may at any time
terminate  or modify the 1994 Plan,  except  that  without  the  approval of the
stockholders it may not increase the number of shares as to which options may be
granted,  change the class of persons  eligible to participate in the 1994 Plan,
change the minimum  purchase price of shares subject to the options,  extend the
maximum  period for granting or  exercising  options,  or  otherwise  materially
increase the benefits  accruing to optionees  under the 1994 Plan. The 1994 Plan
will  terminate on June 6, 2004.  No  termination  or amendment of the 1994 Plan
may,  without  the consent of the  optionee to whom an option has been  granted,
alter or impair any rights or obligations under any option theretofore granted.

PROPOSED AMENDMENTS

     The complete  text of the Third  Amendment to the 1994 Plan, as approved by
the Board of Directors, subject to stockholder approval, is set forth in Exhibit
C to this Proxy  Statement.  The  following  summary of proposed  amendments  is
qualified in its  entirety by  reference to the Third  Amendment as set forth in
Exhibit C.

     Under the proposed Third  Amendment to the 1994 Plan,  effective  March 24,
1999,  the  number of shares  which may be issued  under the 1994 Plan  would be
increased from 1,920,000  shares of Class A Common Stock to 2,920,000  shares of
Class A Common Stock under  Section 2.1 of the 1994 Plan,  and such amount would
be further increased on January 1st of each year,  through and including January
1, 2004, by an additional  amount equal to 1% of the Company's total outstanding
shares of Class A and Class B Common  Stock on such dates.  As of March 1, 1999,
options to acquire 99,138 shares were available for grant under the 1994 Plan.

     In connection with the proposal to approve the Deferred  Compensation Plan,
the Third  Amendment  includes  changes to the  definitions  of the terms "Early
Retirement" and "Normal  Retirement." These changes are intended to clarify that
the retirement  provisions  under the Deferred  Compensation  Plan do not affect
these terms as defined in the 1994 Plan.

     In  light  of  recent  changes  adopted  by  the  Securities  and  Exchange
Commission, Section 6.1 ("Compensation Committee") would be amended to eliminate
the existing  requirement that Committee  members be disinterested  directors as
previously  required under the former Rule 16b-3 under the  Securities  Exchange
Act of 1934, and further amended to clarify that all members of the Compensation
Committee would not be required to be "outside  directors" as defined in Section
162(m) of the Code.

     The Third  Amendment  would also (i) revise  Section 1 to reflect  the full
name of the 1994 Plan,  (ii) amend Section 2.2 and Section 3 to clarify that the
limitation  on the number of options that may be granted to any  employee  under
the plan shall be adjusted to reflect changes in the Company's shares, and (iii)
amend Section 4.4 ("Method of Exercise") to expressly  recognize  attestation of
the ownership of an optionee's  shares as an acceptable  method of  transferring
previously  owned shares to the Company in payment of the  exercise  price of an
option upon exercise.

FEDERAL INCOME TAX CONSEQUENCES

     INCENTIVE  STOCK OPTIONS.  An optionee does not realize income on the grant
of an incentive stock option. If an optionee exercises an incentive stock option
in  accordance  with the terms of the option and does not  dispose of the shares
acquired within two years from the date of the grant of the option or within one
year from the date of the  exercise,  the optionee will not realize any ordinary
income by reason of the  exercise,  and the Company will be allowed no deduction
by reason of the  grant or the  exercise.  The  optionee's  basis in the  shares
acquired upon exercise will be the amount of cash paid upon  exercise.  Provided
the optionee holds the shares acquired as a capital asset at the time of sale or
other disposition of the shares, his or her gain or loss, if any,  recognized on
the sale or other disposition, will be a capital gain or loss. The amount of his
or her gain or loss will be the  difference  between the amount  realized on the
disposition of the shares and his or her basis in the shares.

     If an  optionee  disposes  of the shares  within two years from the date of
grant of the option or within one year from the date of  exercise,  the optionee
will realize ordinary income at the time of disposition  equal to the excess, if
any,  of the lesser of (a) the amount  realized on the  disposition,  or (b) the
fair  market  value of the shares on the date of  exercise  over the  optionee's
basis in the shares.  The Company  will be entitled to a deduction  in an amount
equal to such income.  The excess, if any, of the amount realized on disposition
of such shares over the fair market  value of the shares on the date of exercise
will be  treated  as a long- or  short-term  capital  gain,  depending  upon the
holding  period of the  shares,  provided  the  optionee  holds the  shares as a
capital asset at the time of disposition.

     The excess of the fair market value of the shares at the time the incentive
stock  option  is  exercised  over the  exercise  price  for the  shares  is tax
preference  income  for  purposes  of  computing  the  alternative  minimum  tax
applicable to individuals.

     NONQUALIFIED  STOCK OPTIONS.  Nonqualified stock options do not qualify for
the special tax  treatment  accorded to incentive  stock options under the Code.
Although an optionee does not  recognize  income at the time of the grant of the
option, he or she recognizes ordinary income upon the exercise of a nonqualified
stock  option in an amount  equal to the excess of the fair market  value of the
stock on the date of exercise of the option over the amount of cash paid for the
stock.

     As a result of the optionee's  exercise of a nonqualified stock option, the
Company will be entitled to deduct as compensation an amount equal to the amount
included in the optionee's gross income. If the optionee pays all or part of the
option price of a nonqualified stock option by surrendering shares already owned
by such optionee, certain additional tax rules apply.

     The excess of the fair market value of the stock on the date of exercise of
a  nonqualified  stock  option over the exercise  price is not a tax  preference
item.

     RESTRICTED  SHARES.  An optionee does not recognize  income upon receipt of
restricted  shares (unless he or she elects,  within thirty days of the transfer
of restricted  shares,  to recognize  income  currently).  Upon the lapse of the
restriction,  the optionee will recognize  income in an amount equal to the fair
market  value of the shares on the date the  restriction  lapses and the Company
will be entitled to a tax deduction equal to the same amount.

     If the optionee elects to recognize income within thirty days of receipt of
the  shares,  he or she will  recognize  income in an  amount  equal to the fair
market value of the shares on the date of receipt of the  restricted  shares and
the Company will be entitled to a tax deduction equal to the same amount.

     CHANGE IN CONTROL. If there is an acceleration of the vesting or payment of
benefits and/or an acceleration  of the  exercisability  of stock options upon a
change in control,  all or a portion of the accelerated  benefits may constitute
"Excess  Parachute  Payments"  under  Section  280G of the  Code.  The  optionee
receiving an Excess Parachute  Payment incurs an excise tax of 20% of the amount
of the payment in excess of the employee's average annual  compensation over the
five calendar years preceding the year of the change in control, and the Company
is not entitled to a deduction for such payment.

     The foregoing is a summary of the Federal  income tax  consequences  to the
participants in the 1994 Plan and to the Company,  based upon current income tax
laws, regulations and rulings.

STOCK OPTION AWARDS

     The  following  table shows  options which have been granted under the 1994
Plan to  date  to  each of the  Named  Officers  and  certain  specified  groups
(including  options  which  have  been  exercised  and  those  which  have  been
forfeited):

<TABLE>

                   AMENDED AND RESTATED 1994 STOCK OPTION PLAN
<CAPTION>

                                          NUMBER OF       EXERCISE PRICE PER
NAME AND POSITION                         SHARES (#)         SHARE ($)(1)
<S>                                      <C>     <C>           <C>     
- -----------------                         ----------         ------------
BARRETT A. TOAN.....................     182,000 (2)           $33.2692
PRESIDENT, CHIEF EXECUTIVE OFFICER
AND DIRECTOR
STUART L. BASCOMB...................      56,700 (3)           $33.7996
EXECUTIVE VICE PRESIDENT
PATRICK J. BYRNE....................      33,100 (3)           $43.3690
SENIOR VICE PRESIDENT PLYMOUTH SITE
OPERATION
DAVID A. LOWENBERG..................      38,000 (3)           $39.8467
SENIOR VICE PRESIDENT AND DIRECTOR
OF SITE OPERATIONS
GEORGE PAZ..........................     119,800 (3)           $32.8222
SENIOR VICE PRESIDENT AND CHIEF
FINANCIAL OFFICER
Executive Officer Group (4).........     757,400 (3)           $32.3469
Non-Executive Officer Director
Group(5)............................          0                   --
Non-Executive Officer Employee
Group(6)............................    1,851,966 (3)          $34.1661

<FN>
     (1) The closing  price per share of the  Company's  Class A Common Stock as
reported on Nasdaq on March 26,  1999,  was $75.50.  Exercise  prices  shown are
weighted averages of the actual exercise prices for stock options granted to the
individuals or members of the groups, as applicable.

     (2) See Note 2 to "Option Grants in Fiscal Year 1998" on page __.

     (3) See Note 7 to "Option Grants in Fiscal Year 1998" on page __.

     (4) Consists of eleven persons.

     (5) Consists of nine persons.

     (6) Consists of 215 persons.
</FN>
</TABLE>

     Approval of this proposal  requires the  affirmative  vote of a majority of
the votes of shares  present,  in person or by proxy,  and entitled to vote at a
meeting  of  the   stockholders  of  the  Company  voting  as  a  single  class.
Accordingly,  abstentions  will have the effect of votes against this  proposal,
and  non-votes  will be  disregarded  and have no effect on the  outcome of this
proposal.

     THE  BOARD  OF  DIRECTORS  RECOMMENDS  A VOTE  FOR  APPROVAL  OF THE  THIRD
AMENDMENT TO THE AMENDED AND RESTATED 1994 STOCK OPTION PLAN.


                V. PROPOSAL TO APPROVE THE FIRST AMENDMENT TO THE
        EXPRESS SCRIPTS, INC. AMENDED AND RESTATED 1992 STOCK OPTION PLAN

BACKGROUND

         On April 2, 1992, the Board of Directors and the stockholder of the
  Company adopted the 1992 Stock Option Plan, which provides for the grant of
nonqualified stock options and incentive stock options (within the meaning of
Section 422 of the Code) to certain officers and other key employees of the
Company or certain subsidiaries. On March 22, 1995, the Board of Directors
adopted the Amended and Restated 1992 Stock Option Plan (the "1992 Plan"), which
was approved by the stockholders of the Company on May 24, 1995. The purposes of
the 1992 Plan are to further the growth, development and financial success of
the Company by providing incentives to those officers and other key employees
who have the capacity for contributing in substantial measure toward the growth
and profitability of the Company and to assist the Company in attracting and
retaining employees with the ability to make such contributions.

     On March 24, 1999, the Board of Directors  approved  certain  amendments to
the 1992 Plan (the "First  Amendment") which are described below under "Proposed
Amendments."  NYLIFE  HealthCare  has indicated its intention to vote its shares
for approval of the First Amendment.  Assuming NYLIFE  HealthCare votes in favor
of the First Amendment, such vote would be sufficient to approve such amendment.
If the First Amendment is not approved, the existing plan and outstanding awards
would continue in effect.

SUMMARY OF THE 1992 PLAN

     The following  summary of certain  provisions of the 1992 Plan is qualified
in its entirety by reference to the text of the 1992 Plan.

     A total of 1,400,000 shares of Class A Common Stock were initially reserved
for  issuance  under the 1992  Plan.  Pursuant  to the 1992  Plan,  that  number
increased annually by 140,000 shares,  beginning January 1, 1993, with the final
annual increase  occurring on January 1, 1999 (the "Evergreen  Provision").  The
maximum  number of shares  issuable  under  the 1992  Plan  also is  subject  to
adjustment  by the  Committee in the event of certain  changes in the  Company's
shares of Class A Common  Stock,  including  stock splits.  The foregoing  share
numbers reflect the 1998 Stock Split.  As of March 1, 1999,  options to purchase
an aggregate of 2,236,280 shares of Class A Common Stock have been granted under
the 1992 Plan to 46 employees of the Company,  leaving 143,720 shares of Class A
Common  Stock  available  for  grants  under the 1992  Plan.  Approximately  225
employees are currently  eligible to participate in the 1992 Plan. The 1992 Plan
will terminate on March 31, 2002.

     Except  as  described   above,   or  as  described  below  under  "Proposed
Amendments,"  the  terms  and  conditions  of the 1992  Plan  are  substantially
identical to those of the 1994 Plan. Reference is hereby made to the description
of the 1994 Plan contained under "IV. Proposal to Approve the Third Amendment to
the Express Scripts, Inc. Amended and Restated 1994 Stock Option Plan -- Summary
of the 1994 Plan," which is hereby incorporated herein by reference.

PROPOSED AMENDMENTS

     The complete  text of the First  Amendment to the 1992 Plan, as approved by
the Board of Directors, subject to stockholder approval, is set forth in Exhibit
D to this Proxy  Statement.  The  following  summary of proposed  amendments  is
qualified in its  entirety by  reference to the First  Amendment as set forth in
Exhibit D.

     Except as described  below,  the proposed  amendments  to the 1992 Plan set
forth in the First  Amendment are identical to those  proposed to be made in the
Third  Amendment  to the 1994  Plan.  See "IV.  Proposal  to  Approve  the Third
Amendment to the Express  Scripts,  Inc.  Amended and Restated 1994 Stock Option
Plan," which is incorporated herein by reference.

     Unlike the Third Amendment to the 1994 Plan, the proposed  amendment to the
1992 Plan does not  increase  the maximum  number of shares  issuable  under the
plan.  Instead,  Section 2.1 ("Shares  Subject to Plan") would be revised to set
forth the current  limit,  adjusted for the 1998 Stock Split,  and to remove the
Evergreen Provision, which lapsed as of January 1, 1999.

STOCK OPTION AWARDS

     The  following  table shows  options which have been granted under the 1992
Plan to  date  to  each of the  Named  Officers  and  certain  specified  groups
(including  options  which  have  been  exercised  and  those  which  have  been
forfeited):

<TABLE>
                   AMENDED AND RESTATED 1992 STOCK OPTION PLAN
<CAPTION>

                                          NUMBER OF       EXERCISE PRICE PER
NAME AND POSITION                           SHARES             SHARE (1)
<S>                                        <C>                  <C>    
- -----------------                           ------             ---------
BARRETT A. TOAN.....................       476,000              $7.3529
PRESIDENT, CHIEF EXECUTIVE OFFICER
AND DIRECTOR
STUART L. BASCOMB...................       230,000              $7.7984
EXECUTIVE VICE PRESIDENT
PATRICK J. BYRNE....................          0                   --
SENIOR VICE PRESIDENT PLYMOUTH SITE
OPERATION
DAVID A. LOWENBERG..................       100,000             $17.0391
SENIOR VICE PRESIDENT AND DIRECTOR
OF SITE OPERATIONS
GEORGE PAZ..........................        5,000              $42.3907
SENIOR VICE PRESIDENT AND CHIEF
FINANCIAL OFFICER
Executive Officer Group (4).........      1,052,000            $10.2869
Non-Executive Officer Director
Group(5)............................          0                   --
Non-Executive Officer Employee
Group(6)............................      1,478,650            $13.8773

<FN>
(1)  The closing price per share of the Company's Class A Common Stock as
     reported on Nasdaq on March 26, 1999, was $75.50. Exercise prices shown are
     weighted averages of the actual exercise prices for stock options granted
     to the individuals or members of the groups, as applicable.
(2)  See Note 2 to "Option Grants in Fiscal Year 1998" on page __.
(3)  See Note 7 to "Option Grants in Fiscal Year 1998" on page __.
(4)  Consists of eleven persons.
(5)  Consists of nine persons.
(6)  Consists of 62 persons.

</FN>
</TABLE>

     Approval of this proposal  requires the  affirmative  vote of a majority of
the votes of shares  present,  in person or by proxy,  and entitled to vote at a
meeting  of  the   stockholders  of  the  Company  voting  as  a  single  class.
Accordingly,  abstentions  will have the effect of votes against this  proposal,
and  non-votes  will be  disregarded  and have no effect on the  outcome of this
proposal.

         THE BOARD OF DIRECTORS RECOMMENDS A VOTE FOR APPROVAL OF THE FIRST
AMENDMENT TO THE AMENDED AND RESTATED 1992 STOCK OPTION PLAN.


               VI. PROPOSAL TO APPROVE THE FOURTH AMENDMENT TO THE
        EXPRESS SCRIPTS, INC. AMENDED AND RESTATED 1994 STOCK OPTION PLAN

BACKGROUND

     Effective as of April 1, 1999,  the Company  entered into a new  Employment
Agreement with Barrett A. Toan, its President and Chief Executive Officer, which
replaced  his  previous  employment  agreement.   Among  other  provisions,  the
Employment Agreement provides for the vesting of unvested options and restricted
shares  received  upon  exercise of options,  the  extension of option  exercise
periods and the payment by the Company of any excise tax  triggered  by a change
of control of the Company. See "Executive Compensation -- Employment Agreement."
These  provisions  differ  from  those  under the 1994  Plan and the 1992  Plan,
pursuant to each of which Mr. Toan has been  granted  options and may be granted
additional options in the future. The Employment  Agreement requires the Company
to submit  this  proposal to amend the 1994 Plan and the 1992 Plan to ensure the
effectiveness  of these  provisions.

     On March 24, 1999, the Board of Directors  approved  certain  amendments to
the 1994 Plan (the "Fourth Amendment") which are described below under "Proposed
Amendment."  NYLIFE HealthCare has agreed to vote its shares for approval of the
Fourth  Amendment.  Assuming  NYLIFE  HealthCare  votes in  favor of the  Fourth
Amendment,  such vote would be  sufficient  to approve  such  amendment.  If the
Fourth Amendment is not approved, the existing plan and outstanding awards would
continue in effect.

SUMMARY OF THE 1994 PLAN

     See "IV.  Proposal to Approve the Third  Amendment to the Express  Scripts,
Inc.  Amended and Restated  1994 Stock Option Plan -- Summary of the 1994 Plan,"
which is hereby incorporated herein by reference.

PROPOSED AMENDMENTS

     The complete text of the Fourth  Amendment to the 1994 Plan, as approved by
the Board of Directors, subject to stockholder approval, is set forth in Exhibit
E to this Proxy  Statement.  The  following  summary of proposed  amendments  is
qualified in its  entirety by reference to the Fourth  Amendment as set forth in
Exhibit E.

     Under the proposed Fourth Amendment to the 1994 Plan, certain provisions of
the 1994 Plan would be amended to exclude from their coverage  provisions  under
the Employment  Agreement that govern previously  granted options and options to
be granted in the future to Mr. Toan under the 1994 Plan,  as well as restricted
shares  received  upon  exercise of such options.  These  provisions  govern the
vesting and continued exercisability of options and vesting of restricted shares
upon a "change of control" and termination of employment, and the payment of any
excise tax that is  triggered  by a change of control,  as such tax may apply to
any parachute payments relating to options granted under the 1994 Plan.

     The  Employment  Agreement  provides  that all of Mr.  Toan's stock options
granted under the Employee Stock Option Plans,  including those granted prior to
the date of the Employment  Agreement,  and all of Mr. Toan's  restricted shares
acquired  upon  exercise of such  options  will become  fully  vested upon (i) a
"Change of Control," (ii)  termination  of Mr. Toan's  employment by the Company
without  "Cause,"  (iii)  termination by Mr. Toan for "Good Reason" and (iv) Mr.
Toan's death or "Disability"  (as each such  capitalized  term is defined in the
Employment  Agreement).  Upon the occurrence of any of the foregoing events, Mr.
Toan's options will remain  exercisable for 18 months after such event (or until
the expiration  date of the option,  if the remaining term of the option is less
than 18 months). In addition, Mr. Toan may exercise his vested options within 30
days after termination of his employment by the Company for Cause or by Mr. Toan
without Good Reason.  The Employment  Agreement also provides that, in the event
of any Change of Control that results in Mr. Toan's liability for the payment of
an  excise  tax under  Section  4999 of the Code (or any  similar  tax under any
federal,  state, local or other law), the Company will make a "gross-up" payment
which,  in general,  will  effectively  reimburse  Mr. Toan in full for any such
excise taxes.

     Under the proposed Fourth  Amendment to the 1994 Plan,  these provisions of
the Employment  Agreement  would override the comparable  provisions of the 1994
Plan that govern the vesting,  exercise period and termination of options upon a
change of control and  termination  of  employment.  These 1994 Plan  provisions
include the  requirement  that (i) all  outstanding  options  terminate upon any
change of control,  (ii)  optionees  receive  payment  from the Company for such
options and restricted shares upon any change of control and (iii) any parachute
payments be reduced to avoid any excise tax that may be triggered by a change of
control.  See "IV.  Proposal  to  Approve  the Third  Amendment  to the  Express
Scripts, Inc. Amended and Restated 1994 Stock Option Plan -- Summary of the 1994
Plan -- Vesting and Change of Control Provisions" for a detailed  description of
the 1994 Plan  provisions  governing the vesting and  termination of options and
restricted shares issued under the 1994 Plan.

STOCK OPTION AWARDS

     See "IV.  Proposal to Approve the Third  Amendment to the Express  Scripts,
Inc.  Amended and Restated 1994 Stock Option Plan -- Stock Option Awards," which
is hereby incorporated herein by reference.

     Approval of this proposal  requires the  affirmative  vote of a majority of
the votes of shares  present,  in person or by proxy,  and entitled to vote at a
meeting  of  the   stockholders  of  the  Company  voting  as  a  single  class.
Accordingly,  abstentions  will have the effect of votes against this  proposal,
and  non-votes  will be  disregarded  and have no effect on the  outcome of this
proposal.

         THE BOARD OF DIRECTORS RECOMMENDS A VOTE FOR APPROVAL OF THE FOURTH
AMENDMENT TO THE AMENDED AND RESTATED 1994 STOCK OPTION PLAN.


              VII. PROPOSAL TO APPROVE THE SECOND AMENDMENT TO THE
        EXPRESS SCRIPTS, INC. AMENDED AND RESTATED 1992 STOCK OPTION PLAN

BACKGROUND

     See "VI.  Proposal to Approve the Fourth  Amendment to the Express Scripts,
Inc. Amended and Restated 1994 Stock Option Plan -- Background," which is hereby
incorporated herein by reference.

     On March 24, 1999, the Board of Directors  approved  certain  amendments to
the 1992 Plan (the "Second Amendment") which are described below under "Proposed
Amendment."  NYLIFE HealthCare has agreed to vote its shares for approval of the
Second  Amendment.  Assuming  NYLIFE  HealthCare  votes in  favor of the  Second
Amendment,  such vote would be  sufficient  to approve  such  amendment.  If the
Second Amendment is not approved, the existing plan and outstanding awards would
continue in effect.

SUMMARY OF THE 1992 PLAN

     See "V.  Proposal to Approve the First  Amendment  to the Express  Scripts,
Inc.  Amended and Restated  1992 Stock Option Plan -- Summary of the 1992 Plan,"
which is hereby incorporated herein by reference.

PROPOSED AMENDMENTS

     The complete text of the Second  Amendment to the 1992 Plan, as approved by
the Board of Directors, subject to stockholder approval, is set forth in Exhibit
F to this Proxy  Statement.  The  following  summary of proposed  amendments  is
qualified in its  entirety by reference to the Second  Amendment as set forth in
Exhibit F.

     The proposed  amendments to the 1992 Plan set forth in the Second Amendment
are identical to those  proposed to be made in the Fourth  Amendment to the 1994
Plan. See "VI.  Proposal to Approve the Fourth Amendment to the Express Scripts,
Inc. Amended and Restated 1994 Stock Option Plan," which is incorporated  herein
by reference.

STOCK OPTION AWARDS

     See "V.  Proposal to Approve the First  Amendment  to the Express  Scripts,
Inc.  Amended and Restated 1992 Stock Option Plan -- Stock Option Awards," which
is hereby incorporated herein by reference.

     Approval of this proposal  requires the  affirmative  vote of a majority of
the votes of shares  present,  in person or by proxy,  and entitled to vote at a
meeting  of  the   stockholders  of  the  Company  voting  as  a  single  class.
Accordingly,  abstentions  will have the effect of votes against this  proposal,
and  non-votes  will be  disregarded  and have no effect on the  outcome of this
proposal.

         THE BOARD OF DIRECTORS RECOMMENDS A VOTE FOR APPROVAL OF THE SECOND
AMENDMENT TO THE AMENDED AND RESTATED 1992 STOCK OPTION PLAN.


   VIII. PROPOSAL TO APPROVE THE SECOND AMENDMENT TO THE EXPRESS SCRIPTS, INC.
        AMENDED AND RESTATED 1992 STOCK OPTION PLAN FOR OUTSIDE DIRECTORS

BACKGROUND

     On April 2, 1992, the Board of Directors and the stockholder of the Company
adopted the 1992 Stock Option Plan for Outside  Directors which provides for the
grant of  nonqualified  stock options to those members of the Board of Directors
who are not  employees  of the Company or certain  affiliates  (a  "Non-Employee
Director").  On May 24, 1995, the stockholders approved the Amended and Restated
1992 Stock Option Plan for Outside Directors (the "Outside  Directors Plan"). On
May 27,  1997,  the  stockholders  approved  the First  Amendment to the Outside
Directors Plan,  which increased the number of shares available under such plan,
awarded additional options to the existing Non-Employee  Directors and increased
the award which newly elected Non-Employee  Directors would receive. The purpose
of the Outside Directors Plan is to increase the proprietary and vested interest
of the  Non-Employee  Directors of the Company in the growth and  performance of
the Company by granting them options in the Company's stock.

     On January 27, 1999, the Board of Directors  approved the Second  Amendment
to the Outside  Directors Plan  (described  below under  "Proposed  Amendment"),
which approved additional awards of stock options to be granted under such plan.
NYLIFE HealthCare has indicated its intention to vote its shares for approval of
the Second  Amendment.  Assuming NYLIFE  HealthCare votes in favor of the Second
Amendment,  such vote would be  sufficient  to approve  such  amendment.  If the
Second  Amendment to the Outside  Directors  Plan is not approved,  the existing
plan would  continue  in effect and the  options to  purchase  2,500  additional
shares granted to existing Non-Employee  Directors as of January 27, 1999, would
be null and void.

SUMMARY OF THE OUTSIDE DIRECTORS PLAN

     The complete text of the Second Amendment to the Outside Directors Plan, as
approved by the Board of  Directors,  subject to  stockholder  approval,  is set
forth in Exhibit G to this Proxy  Statement.  The  following  summary of certain
provisions  of the  Outside  Directors  Plan is  qualified  in its  entirety  by
reference to the text of the Outside Directors Plan.

     The Outside Directors Plan is administered by the Board. A total of 384,000
shares of Class A Common Stock have been  reserved  for grants of options  under
the Outside Directors Plan,  subject to antidilution  adjustments as provided in
the plan. The foregoing share number reflects the 1998 Stock Split.

     Messrs. Norling, Waltman and Zachary are the Company's current Non-Employee
Directors.  On June 6,  1992,  Mr.  Norling  and Mr.  Zachary  each  received  a
nonqualified  stock option to purchase  28,000 shares of Class A Common Stock at
an exercise price of $3.25 per share,  as reflected in the table below.  On June
16, 1996,  Mr.  Norling and Mr.  Zachary each  received an option to purchase an
additional  20,000  shares  of  Class  A  Common  Stock,  which  vested  in  two
installments  of 10,000 each on June 16, 1996, and June 16, 1997, at an exercise
price of $26.625 per share. On May 22, 1996, Mr. Waltman received a nonqualified
stock  option to purchase  48,000  shares of Class A Common Stock at an exercise
price of $23.50 per share, which vests in five equal annual installments on each
anniversary of the date of grant.

     Currently  under the Outside  Directors  Plan, any other  individual who is
elected as a Non-Employee  Director will be granted an option to purchase 48,000
shares of Class A Common Stock as of the date of the first  meeting of the Board
of Directors which such director attends.  All such options are exercisable at a
price  equal to the  fair  market  value of Class A Common  Stock on the date of
grant  (generally,  the  closing  sales  price on Nasdaq  on the last  preceding
trading day), and have a term of ten years.  The options  become  exercisable in
five equal annual  installments,  beginning on the first anniversary date of the
date of grant.  If an  optionee  ceases to be a  Non-Employee  Director  for any
reason  other  than  his or her  death or  total  disability,  all of his or her
outstanding  options will expire,  except that if such director has attained age
65  prior  to such  cessation,  the  portion  of the  options  that  has  become
exercisable  will remain  exercisable  for the lesser of three months  following
such  cessation or the  remainder of the  original  option term.  If an optionee
ceases to be a  Non-Employee  Director  as a result of his or her death or total
disability,  all of his or her outstanding options will become fully exercisable
and remain  exercisable  for the lesser of three months or the  remainder of the
original option term.

     A Non-Employee  Director's  options will also become fully exercisable upon
the  occurrence  of a "change in control" of the  Company.  For options  granted
pursuant to the  Outside  Directors  Plan after it was  amended and  restated in
1995,  "change in control"  generally means one of the following events: (i) the
first date both of the following  conditions exist: (A) New York Life shall have
ceased  to be the  ultimate  beneficial  owner of fifty  percent  or more of the
combined  voting power for the  election of directors of the Company,  and (B) a
person  (other  than the  Company or any parent  corporation  or  subsidiary  or
related  employee benefit plan) is the beneficial owner of fifty percent or more
of the combined voting power for the election of directors of the Company;  (ii)
the  stockholders of the Company  approve a plan of complete  liquidation of the
Company;  or (iii) the  stockholders of the Company approve an agreement for the
sale or disposition by the Company of all or substantially  all of the Company's
assets or any transaction  having a similar effect.  In the event of a change in
control,  all options,  whether or not previously  exercisable and vested,  will
terminate,  and the Company  will pay the optionee an amount equal to the excess
of the  change in  control  price over the  option  exercise  price.  "Change in
control price" generally means, in a change in control transaction in connection
with which New York Life receives consideration for the transfer or cancellation
of its voting securities, the per share amount received by New York Life; and in
the case of any other change in control transaction,  the greater of the closing
sales  price on  Nasdaq  or the  highest  price  per  share  paid in a bona fide
transaction  relating  to such  change in control at any time during the 60 days
immediately  preceding the change in control date.  Options granted prior to the
time the  Outside  Directors  Plan was  amended  and  restated in 1995 will also
become  fully  exercisable  upon a change in control  as defined in the  Outside
Directors  Plan before it was amended and  restated.  Prior to its amendment and
restatement in 1995, "change in control" in the Outside Directors Plan generally
meant the occurrence of any of the following events at a time when New York Life
is not the  beneficial  owner of fifty  percent or more of the  combined  voting
power for the election of the  directors of the Company:  (i) any person  (other
than the Company or any parent  corporation  or subsidiary  or related  employee
benefit plan) becomes the  beneficial  owner of  securities  representing  fifty
percent or more of the  combined  voting  power for the election of directors of
the  Company;  (ii) a change  in the  majority  of the  members  of the Board of
Directors during any two-year period that is not approved by at least two-thirds
of the members of the Board who were  members at the  beginning  of the two-year
period;  (iii) the stockholders of the Company approve a merger or consolidation
involving  the Company  that  results in  existing  stockholders  owning  eighty
percent or less of the  combined  voting power of the voting  securities  of the
Company after such merger or  consolidation,  other than a  recapitalization  or
similar transaction in which no "person" acquires more than fifty percent of the
combined voting power for the election of directors; or (iv) the stockholders of
the Company approve a plan of complete liquidation or an agreement providing for
the sale or  disposition  of  substantially  all of the Company's  assets or any
transaction  having a similar effect.  The Company may, but is not obligated to,
request the holders of  outstanding  options  granted prior to the amendment and
restatement  of the Outside  Directors Plan to consent to the amendment of their
existing  option  agreements  to reflect the Amendment  and  Restatement.  These
option agreements have not been amended.

     Options  are not  transferable  other  than by will or  under  the  laws of
descent  and  distribution,  and are  exercisable  during  the  lifetime  of the
optionee  only by the optionee or his or her  guardian or legal  representative.
The Board of Directors may at any time terminate or modify the Outside Directors
Plan,  except that without the approval of the  stockholders it may not increase
the number of shares as to which  options  may be  granted,  change the class of
persons who constitute  Non-Employee  Directors eligible to participate,  change
the  requirement  that the purchase  price of shares  subject to options be fair
market value,  extend the maximum  period for granting or exercising  options or
otherwise  materially  increase  the benefits  accruing to  optionees  under the
Outside Directors Plan. In addition, certain of the operative provisions may not
be amended more than once in any six month  period,  unless the  amendments  are
made to comply with changes in certain federal laws. The Outside  Directors Plan
will  terminate on March 31, 2002.  No  termination  or amendment of the Outside
Directors  Plan may,  without the consent of the  optionee to whom an option has
been  granted,  alter or impair  any  rights  or  obligations  under any  option
theretofore granted.

PROPOSED AMENDMENT

     The complete text of the Second Amendment to the Outside Directors Plan, as
approved by the Board of  Directors,  subject to  stockholder  approval,  is set
forth in  Exhibit  G to this  Proxy  Statement.  The  following  summary  of the
proposed  amendments  is  qualified  in its  entirety by reference to the Second
Amendment as set forth in Exhibit G.

     Under  the  proposed  Second  Amendment  to  the  Outside  Directors  Plan,
effective  January 27, 1999,  all share numbers in the plan would be adjusted to
reflect the 1998 Stock Split.

     In addition, with respect to Messrs. Norling,  Waltman and Mr. Zachary, who
were  Non-Employee  Directors prior to January 27, 1999, each received an option
to purchase 2,500 additional shares of Class A Common Stock on January 27, 1999,
which will vest in three  equal  annual  installments  beginning  on January 27,
2000. The exercise price of these options is equal to $65.25, which was the fair
market value on the date of grant.

FEDERAL INCOME TAX CONSEQUENCES

     The options  granted  under the Outside  Directors  Plan are not  incentive
stock  options and do not qualify  for the  special  tax  treatment  accorded to
incentive stock options under Section 422 of the Code. Although an optionee does
not  recognize  income  at the  time  of the  grant  of  the  option,  he or she
recognizes  ordinary  income upon the  exercise  of a stock  option in an amount
equal  to the  excess  of the  fair  market  value  of the  stock on the date of
exercise of the option over the amount of cash paid for the stock.

     As a result of the optionee's  exercise of a nonqualified stock option, the
Company will be entitled to deduct as compensation an amount equal to the amount
included in the optionee's gross income. If the optionee pays all or part of the
option price of a nonqualified stock option by surrendering shares already owned
by such optionee,  certain  additional  tax rules apply.  The excess of the fair
market value of the stock on the date of exercise of a nonqualified stock option
over the exercise price is not a tax preference item.

     If there is an acceleration of the vesting or payment of benefits and/or an
acceleration  of the  exercisability  of stock options upon a change in control,
all or a portion of the accelerated  benefits may constitute  "Excess  Parachute
Payments"  under  Section  280G of the Code.  The  optionee  receiving an Excess
Parachute  Payment  incurs an excise tax of 20% of the amount of the  payment in
excess of the  employee's  average  annual  compensation  over the five calendar
years  preceding  the year of the  change in  control,  and the  Company  is not
entitled to a deduction for such payment.

     The foregoing is a summary of the Federal  income tax  consequences  to the
participants  in the  Outside  Directors  Plan and to the  Company , based  upon
current income tax laws, regulations and rulings.

STOCK OPTION AWARDS

     The table set forth below  shows  options  which have been  granted to date
under the Outside  Directors Plan to certain  specified  individuals and groups.
Certain options are subject to stockholder approval, as indicated.

<TABLE>

                             AMENDED AND RESTATED 1992 STOCK OPTION PLAN FOR OUTSIDE DIRECTORS
<CAPTION>

                                            NUMBER OF           EXERCISE PRICE PER
 NAME AND POSITION                          SHARES (#)             SHARE ($) (1)
<S>                                         <C>    <C>                <C>     
 -----------------                          ----------             -------------
 Richard A. Norling                         50,500 (2)                $14.7351
 Howard L. Waltman                          50,500 (2)                $14.7351
 Norman Zachary                             50,500 (2)                $25.5668
 All current directors as a group (3)        151,500                  $18.3457

<FN>
(1)  The closing price of the Company's Class A Common Stock as reported on
     Nasdaq on March 26, 1999, was $75.50. Exercise prices shown are weighted
     averages of the actual exercise prices for stock options granted to the
     individuals or members of the groups, as applicable.
(2)  Includes options to acquire 2,500 shares under the proposed Second 
     Amendment to the Amended and Restated 1992 Stock
     Option Plan For Outside Directors.
(3)  Consists of three persons.
</FN>
</TABLE>

     Approval of this proposal  requires the  affirmative  vote of a majority of
the votes of shares  present,  in person or by proxy,  and entitled to vote at a
meeting  of  the   stockholders  of  the  Company  voting  as  a  single  class.
Accordingly,  abstentions  will have the effect of votes against this  proposal,
and  non-votes  will be  disregarded  and have no effect on the  outcome of this
proposal.

     THE  BOARD OF  DIRECTORS  RECOMMENDS  A VOTE  FOR  APPROVAL  OF THE  SECOND
AMENDMENT  TO THE  AMENDED  AND  RESTATED  1992 STOCK  OPTION  PLAN FOR  OUTSIDE
DIRECTORS.


         IX. AND X. PROPOSALS TO AMEND THE CERTIFICATE OF INCORPORATION
                  TO INCREASE AUTHORIZED SHARES OF COMMON STOCK

     The Board of Directors  has proposed two  amendments to Article Four of the
Certificate  of  Incorporation  of the Company  (the  "Amendments").  One of the
Amendments  (Proposal IX) would  increase the number of shares of Class A Common
Stock which the Company is authorized to issue to 250,000,000  shares. The other
Amendment (Proposal X) would increase the number of authorized shares of Class B
Common Stock to 65,000,000 shares.

     The Certificate of Incorporation  presently authorizes the Company to issue
5,000,000 shares of Preferred Stock,  issuable in series, the terms of which may
be fixed by the Board of  Directors,  75,000,000  shares of Class A Common Stock
and  22,000,000  shares of Class B Common  Stock.  The  Class B Common  Stock is
convertible,  share-for-share,  into  Class A Common  Stock at the option of the
holder and  automatically  so converts upon any transfer to any person or entity
other than New York Life or its affiliates.  In stockholder votes, each share of
Class A Common Stock has one vote and each share of Class B Common Stock has ten
votes.  Under the Certificate of  Incorporation,  the outstanding Class B Common
Stock is entitled to equal treatment (payable in shares of Class B Common Stock)
with the  Class A Common  Stock in the event of any  Common  Stock  dividend  or
split.  Dividends on the common stock will be paid if, when and as determined by
the Board of Directors out of funds legally  available for this purpose.  In all
respects  other than voting power and the  convertibility  of the Class B Common
Stock,  the  shares  of Class A  Common  Stock  and  Class B  Common  Stock  are
identical. Stockholders do not have cumulative voting rights with respect to the
election of directors.  The affirmative vote of the holders of a majority of the
outstanding  Class A Common  Stock is required  for an  amendment of the By-laws
that would alter the  requirement  that a majority of the directors on the Audit
Committee be persons who are not directors of New York Life or its  subsidiaries
(other  than the  Company)  or  officers  or  employees  of New York Life or its
subsidiaries (other than the Company).

     Other than Premier,  the holders of the Common Stock do not have preemptive
rights as to additional issues of Common Stock or, other than the Class B Common
Stock,  conversion  rights.  Premier  has a  contractual  right  pursuant to its
agreements  with the  Company to  maintain  its  proportionate  interest  in the
Company's Class A Common Stock should the Company issue additional shares of its
Class A Common Stock in a firm commitment public offering. Therefore, should the
Board of Directors  elect to issue  additional  shares of Class A Common  Stock,
existing  stockholders  (other  than  potentially  Premier)  would  not have any
preferential  rights to purchase  such  shares.  Premier  waived its  preemptive
rights  in  connection  with  the  Company's   proposed  primary  offering  (the
"Offering") of  approximately  $350 million of Class A Common Stock. The Company
has filed a registration  statement with the Securities and Exchange  Commission
relating to these securities,  but the registration statement has not yet become
effective.  These  securities  may not be sold nor may offers to buy be accepted
prior to the time the  registration  statement  becomes  effective.  This  Proxy
Statement shall not constitute an offer to sell or the  solicitation of an offer
to buy nor  shall  there be any sale of these  securities  in any state in which
such offer,  solicitation  or sale would be unlawful  prior to  registration  or
qualification under the securities laws of any such state. Once the registration
statement has been declared effective,  a prospectus meeting the requirements of
Section  10 of the  Securities  Act of 1933,  as  amended,  may be  obtained  by
contacting the Company's Investor Relations  Department,  14000 Riverport Drive,
Maryland Heights, Missouri 63043.

     In addition, the shares of Common Stock are not subject to redemption or to
any  further  calls or  assessments  and are not  entitled to the benefit of any
sinking fund  provisions.  After  satisfaction of the  preferential  liquidation
rights of any  preferred  stock,  the  holders of the Class A and Class B Common
Stock are entitled to share,  ratably,  in the distribution of all remaining net
assets.

     At March 31, 1999, no shares of Preferred Stock, 18,706,470 shares of Class
A Common  Stock and  15,020,000  shares of Class B Common  Stock were issued and
outstanding.  Also at such date, a total of 25,443,638  shares of Class A Common
Stock were reserved for future issuance upon conversion of the outstanding Class
B Common Stock (15,020,000  shares), for issuance upon exercise of stock options
granted or which may be granted  under the  Employee  Stock Option Plans and the
Outside  Directors  Plan  (4,166,270  shares,  including the  additional  shares
proposed under the Third Amendment to the 1994 Plan), for issuance in connection
with the ESPP, the Deferred  Compensation  Plan and other employee benefit plans
(450,000  shares),  and for issuance in connection with the Company's  strategic
alliances with certain of its clients (5,807,368 shares).

     The Certificate of Incorporation authorizes the Board of Directors to issue
from time to time,  in one or more series,  shares of preferred  stock with such
designations and preferences, relative voting rights (except that voting rights,
if any, in respect of the election of directors  shall be limited to voting with
the holders of Class A Common Stock and Class B Common Stock, as a single class,
with  no  more  than  one  vote  per  share  of  preferred  stock),  redemption,
conversion,  participation and other rights and qualifications,  limitations and
restrictions as permitted by law. No shares of preferred stock have been issued.

     As a result of the disproportionate voting rights given to holders of Class
B Common Stock,  NYLIFE  Healthcare could reduce its investment to slightly less
than 10% of the  outstanding  common stock and still  control the Company with a
majority of the combined voting power of such common stock. In addition, certain
provisions  of the  Certificate  of  Incorporation  and  the  By-laws  may  have
anti-takeover effects, which may delay, defer or prevent a takeover attempt that
a holder of the Class A Common Stock might consider in its best interest.  These
anti-takeover provisions, among other things: (i) provide that only the Board of
Directors or holders of shares entitled to cast at least 50% of the votes of all
outstanding   shares  entitled  to  vote  may  call  special   meetings  of  the
stockholders;  (ii) eliminate the ability of  stockholders to take any action by
written  consent without a meeting;  and (iii) establish  certain advance notice
procedures  under the By-laws for the  nomination of candidates  for election as
directors  and for  stockholder  proposals  to be  considered  at  stockholders'
meetings.  The  Company  elected not to be subject to Section 203 of the General
Corporation Law of the State of Delaware,  which prohibits certain publicly held
Delaware corporations from engaging in a business combination with an interested
stockholder (any person or entity who,  together with affiliates and associates,
owns (or within the three  immediately  preceding  years did own) 15% or more of
the corporation's voting stock).

     The Board of Directors is recommending  that the authorized  Class A Common
Stock  and  Class B Common  Stock be  increased  so that the  Company  will have
additional shares available for such proper corporate  purposes as the Board may
determine,  without having the further need to seek  stockholder  authorization.
Such purposes might include,  among other  corporate  purposes,  the issuance of
additional  shares as stock  dividends  or stock splits (the number of shares of
Class B Common Stock currently  authorized is insufficient to permit the Company
to effect a 3-for-2 or greater  stock  split) and,  with  respect to the Class A
Common Stock, as  consideration  for the acquisition of properties or businesses
or in capital raising  transactions and the reservation of additional shares for
use in compensation plans or for conversion of Preferred Stock, should the Board
determine to provide  conversion  rights to one or more series of the  Preferred
Stock which it may  establish.  The future  issuance of shares of Class A Common
Stock and Class B Common  Stock  may,  depending  on the  circumstances,  have a
dilutive  effect on the earnings per share,  voting power and other interests of
the existing  stockholders.  Except for the  presently  reserved  shares and the
contemplated  Offering,  the Company  has no present  plans,  understandings  or
commitments  for the issuance of any of the additional  shares of Class A Common
Stock or Class B Common Stock.  The Board of Directors does not presently intend
to seek  stockholder  approval of any particular  issuance of shares unless such
approval  is required by law or the rules of Nasdaq.  The Company  reserves  the
right to seek a further  increase in authorized  shares from time to time in the
future as considered appropriate by the Board of Directors.

     If both of the Amendments are approved, the first paragraph of Article 4 of
the Certificate of Incorporation will read as follows:

     "4. The total number of shares of stock which the Corporation has authority
to issue is  320,000,000  shares,  of which (i)  5,000,000  shares are preferred
stock, par value $0.01 per share (the "Preferred  Stock"),  and (ii) 315,000,000
shares are common  stock,  consisting  of  250,000,000  shares of Class A Common
Stock,  par value $0.01 per share (the "Class A Common  Stock"),  and 65,000,000
shares of Class B Common  Stock,  par value $0.01 per share (the "Class B Common
Stock")."

     If only one of the  proposals  is  approved,  then the  number of shares of
Class A Common Stock or Class B Common Stock,  as the case may be, and the total
number of shares of common stock will be revised accordingly.

     Assuming  stockholders'  approval  of one or both of these  proposals,  the
required amendment or amendments of the Certificate of Incorporation will become
effective at the close of business on June 11, 1999,  or as soon  thereafter  as
practicable.

     The  affirmative  votes of a  majority  of the  total  voting  power of the
outstanding  Class A Common Stock and Class B Common Stock voting  together as a
single  class  and  voting  separately  by class are  necessary  for each of the
proposed Amendments to be approved. Therefore,  abstentions and non-votes (which
may occur if a beneficial owner of stock where shares are held in a brokerage or
bank account fails to provide the broker or bank voting  instructions as to such
shares)  effectively  count as votes  against the  respective  proposal.  NYLIFE
HealthCare has indicated its intention to vote its Class B Common Stock in favor
of the proposed Amendments.

     THE BOARD OF DIRECTORS  RECOMMENDS A VOTE FOR APPROVAL OF THE  PROPOSALS TO
AMEND THE  COMPANY'S  CERTIFICATE  OF  INCORPORATION  TO INCREASE  THE NUMBER OF
AUTHORIZED SHARES OF CLASS A COMMON STOCK AND CLASS B COMMON STOCK.

           XI. RATIFICATION OF APPOINTMENT OF INDEPENDENT ACCOUNTANTS

     The firm of PricewaterhouseCoopers  LLP served as the Company's independent
accountants  for the year ended  December 31, 1998.  The Board of Directors  has
appointed,  subject to stockholder ratification,  PricewaterhouseCoopers  LLP to
act in that capacity for the year ending December 31, 1999. A representative  of
PricewaterhouseCoopers  LLP is expected  to be present at the  Meeting  with the
opportunity  to  make  a  statement  if he or  she  desires  to do so  and to be
available  to  respond  to  appropriate  questions  from  stockholders.   NYLIFE
HealthCare  has  indicated  its  intention  to vote its  shares  in favor of the
ratification of the appointment of  PricewaterhouseCoopers  LLP. Assuming NYLIFE
HealthCare  votes to ratify such  appointment,  such vote would be sufficient to
approve such ratification.

     THE  BOARD  OF  DIRECTORS   RECOMMENDS  A  VOTE  FOR  THE  RATIFICATION  OF
PRICEWATERHOUSECOOPERS LLP AS THE COMPANY'S INDEPENDENT ACCOUNTANTS FOR THE YEAR
ENDING DECEMBER 31, 1999.

             INTEREST OF CERTAIN PERSONS IN MATTERS TO BE ACTED UPON

     Under Proposals VI and VII above,  stockholders  are being asked to approve
certain  amendments  to the  Employee  Stock  Option  Plans that are designed to
accommodate certain provisions under Mr. Toan's Employment Agreement that affect
stock options  granted under such Plans and restricted  shares  underlying  such
options.  If  stockholder  approval is not  obtained  and is deemed to have been
legally required under the terms of such Plans,  failure to obtain such approval
may render those  provisions  affecting  Mr.  Toan's  rights in respect of stock
options granted under the Employee Stock Option Plans unenforceable.

     If  stockholders do not approve  Proposal VIII above,  regarding the Second
Amendment to the Outside Directors Plan, the Board of Directors' approval of the
grant of options to purchase  2,500 shares to each of Messrs.  Norling,  Waltman
and Zachary will be null and void.

                              STOCKHOLDER PROPOSALS

     In accordance with the amended Bylaws of the Company,  a stockholder who at
any annual meeting of  stockholders  of the Company intends to nominate a person
for election as a director or present a proposal must so notify the Secretary of
the Company,  in writing,  describing  such nominee(s) or proposal and providing
information concerning such stockholder and the reasons for and interest of such
stockholder  in the  proposal.  Generally,  to be timely,  such  notice  must be
received by the Secretary  during the 30-day period that ends 90 days before the
anniversary of the prior year's annual meeting. For the Company's annual meeting
to be held in 2000,  any such notice must be received  between  January 27, 2000
and  February 26, 2000 to be  considered  timely for purposes of the 2000 Annual
Meeting.  Any person  interested in making such a nomination or proposal  should
request  a copy of the  relevant  Bylaw  provisions  from the  Secretary  of the
Company.  These time periods also apply in determining  whether notice is timely
for purposes of rules adopted by the Securities and Exchange Commission relating
to the exercise of discretionary voting authority,  and are separate from and in
addition  to  the  Securities  and  Exchange  Commission's  requirements  that a
stockholder  must  meet to  have a  proposal  included  in the  Company's  proxy
statement.

     Stockholder  proposals  intended to be presented at the 2000 Annual Meeting
must be received by the Company no later than  December 24, 1999, in order to be
eligible for inclusion in the Company's  proxy  statement and proxy  relating to
that meeting.  Upon receipt of any proposal,  the Company will determine whether
to  include  such  proposal  in  accordance  with   regulations   governing  the
solicitation of proxies.

                                  OTHER MATTERS

     Management  does not intend to bring  before the Meeting any matters  other
than those  specifically  described above and knows of no matters other than the
foregoing to come before the Meeting.  If any other matters or motions  properly
come  before  the  Meeting,  it is the  intention  of the  persons  named in the
accompanying  Proxy to vote such Proxy in accordance with their judgment on such
matters or  motions,  including  any  matters  dealing  with the  conduct of the
Meeting.

                             SOLICITATION OF PROXIES

     The  Company  will bear the cost of the  solicitation  of  proxies  for the
Meeting. Brokerage houses, banks, custodians, nominees and fiduciaries are being
requested  to  forward  the  proxy  material  to  beneficial  owners  and  their
reasonable  expenses  therefor will be  reimbursed by the Company.  Solicitation
will be made by mail and also may be made personally or by telephone,  facsimile
or other means by the  Company's  officers,  directors  and  employees,  without
special compensation for such activities.  In addition,  the Company has engaged
MacKenzie  Partners,  Inc.  as proxy  solicitors.  The Company has agreed to pay
MacKenzie  Partners,  Inc. a fee of approximately  $6,500, plus reimbursement of
out-of-pocket expenses for its proxy solicitation services.



By Order of the Board of Directors


                                                /s/ Thomas M. Boudreau
                                                Thomas M. Boudreau
April 21, 1999                                  Secretary

<PAGE>

                                   EXHIBIT A

                              EXPRESS SCRIPTS, INC.
                          EMPLOYEE STOCK PURCHASE PLAN

     1. PURPOSE.  The purpose of the Plan is to provide employees of the Company
and its Designated  Subsidiaries with an opportunity to purchase Common Stock of
the Company through accumulated  payroll deductions.  It is the intention of the
Company to have the Plan  qualify as an  "Employee  Stock  Purchase  Plan" under
Section 423 of the Internal Revenue Code of 1986, as amended.  The provisions of
the  Plan  shall,   accordingly,   be  construed  so  as  to  extend  and  limit
participation in a manner consistent with the requirement of that section of the
Code.

     2. DEFINITIONS.

     a) "Board" shall mean the Board of Directors of the Company.

     b) "Code" shall mean the Internal Revenue Code of 1986, as amended.

     c) "Common Stock" shall mean the Class A Common Stock,  par value $0.01, of
the Company.

     d) "Company" shall mean Express Scripts, Inc., a Delaware corporation, and,
unless the context requires otherwise, any Designated Subsidiary.

     e)  "Compensation"  shall mean all regular straight time gross earnings and
commissions,  exclusive  of payments  for  overtime,  shift  premium,  incentive
payments,   bonuses  and  other   compensation,   and  without   reduction   for
contributions to any 401(k) plan sponsored by the Company.

     f)  "Contributions"  shall mean all  amounts  credited  to the account of a
participant pursuant to the Plan.

     g)  "Designated  Subsidiary"  shall  mean  any  Subsidiary  which  has been
designated by the Board from time to time in its sole  discretion as eligible to
participate in the Plan.

     h)  "Employee"  shall mean any person who is an employee of the Company for
tax purposes whose customary employment with the Company is at least twenty (20)
hours per week and more than five (5) months in a calendar year. For purposes of
the Plan,  the  employment  relationship  shall be treated as continuing  intact
while the  individual  is on short  term  disability  or other  leave of absence
approved  by the  Company.  Where the  period of leave  exceeds  90 days and the
individual's  right to  reemployment  is not guaranteed  either by statute or by
contract, the employment  relationship shall be deemed to have terminated on the
91st day of such leave.

     i)  "Exchange  Act"  shall mean the  Securities  Exchange  Act of 1934,  as
amended.

     j)  "Offering  Date"  shall mean the first  business  day of each  Offering
Period of the Plan.

     k) "Offering  Period"  shall mean a period of six (6) months  commencing on
March 1 and September 1 of each year  (commencing  with March 1, 1999) except as
otherwise indicated by the Company.

     l) "Plan" shall mean this Employee Stock Purchase Plan.

     m) "Purchase  Date" shall mean the last day of each Offering  Period of the
Plan.

     n) "Subsidiary"  shall mean a corporation,  domestic or foreign,  which not
less than 50% of the  voting  shares are held by the  Company  or a  Subsidiary,
whether or not such corporation now exists or is hereafter organized or acquired
by the Company or a Subsidiary.

     3. ELIGIBILITY.

     a) Any person who is an Employee of the Company as of the Offering  Date of
a given  Offering  Period,  who has  continuously  been an Employee for at least
three months, and who is not a "senior  executive" of the Company,  as such term
may be defined  from time to time by the Board (or any  committee  administering
the Plan in accordance with Section 13 hereof), shall be eligible to participate
in such Offering Period under the Plan,  subject to the  requirements of Section
5(a) and the limitations imposed by Section 423(b) of the Code.

     b) Any provisions of the Plan to the contrary notwithstanding,  no Employee
shall be granted an option under the Plan (i) if,  immediately  after the grant,
such  Employee (or any other person whose stock would be  attributed  to such an
Employee  pursuant to Section  424(d) of the Code)  would own stock  and/or hold
outstanding  options to purchase stock  possessing  five percent (5%) or more of
the total combined  voting power or value of all classes of stock of the Company
or of any  Subsidiary,  or (ii) if such option would permit his or her rights to
purchase stock under all employee stock purchase plans (described in Section 423
of the Code) of the  Company  and its  Subsidiaries  to  accrue at a rate  which
exceeds  twenty-five  thousand  dollars  ($25,000)  of fair market value of such
stock  (determined at the time such option is granted) for each calendar year in
which such option is outstanding at any time.

     4. OFFERING PERIODS.  The Plan shall be implemented by a series of Offering
Periods of six (6) months duration,  with new Offering Periods  commencing on or
about  March 1 and  September  1 of each year (or at such other time or times as
may be  determined by the Board of  Directors).  The Plan shall  continue  until
terminated in accordance with Section 19 hereof.  The Board shall have the power
to change the duration  and/or the frequency of the Offering Period with respect
to future offerings without stockholder  approval if such change is announced at
least fifteen (15) days prior to the scheduled  beginning of the first  Offering
Period to be affected.

     5. PARTICIPATION.

     a) An eligible  Employee may become a participant in the Plan by completing
a  subscription  agreement  (in such form and manner as may be  approved  by the
Board or the committee  administering the Plan) authorizing  payroll  deductions
and filing it with the Company's  payroll office at least five (5) business days
prior to the applicable Offering Date. A subscription  agreement in effect for a
participant  for a  particular  Offering  Period  will  continue  in effect  for
subsequent  Offering Periods if the participant remains an eligible Employee and
has not withdrawn the subscription agreement pursuant to Section 10.

     b) Payroll  deductions  shall  commence on the first payroll  following the
Offering  Date and shall end on the last payroll paid in the Offering  Period to
which the subscription agreement is applicable,  unless sooner terminated by the
participant as provided in Section 10 hereof.

     c) By  enrolling  in the  Plan,  each  participant  will be  deemed to have
authorized  the  establishment  of a  brokerage  account in his or her name at a
securities  brokerage  firm,  which firm shall serve as custodial  agent for the
purpose of holding shares purchased under the Plan. The account will be governed
by, and subject to, the terms and  conditions  of a written  agreement  with the
firm  approved  by the Board or the  committee  administering  the  Plan,  which
agreement  shall,  among other  things,  reflect the  restrictions  contained in
Section 21(c) and Section 21(d).

     d) Subject to the limitations of Section 3 hereof and Section  423(b)(8) of
the Code,  all cash  dividends,  if any,  paid with  respect to shares of Common
Stock purchased under the Plan and held in a participant's  account  established
under  Section  5(c) shall be  automatically  invested in shares of Common Stock
purchased  at One Hundred  Percent  (100%) of fair market  value (as  determined
under Section 7(b)) on the next Purchase  Date.  All non-cash  distributions  on
Common  Stock  purchased  under  the Plan and  held in a  participant's  account
established  under  Section  5(c)  shall be paid to the  participant  as soon as
practical.

     6. METHOD OF PAYMENT OF CONTRIBUTIONS.

     a) The  participant  shall elect to have payroll  deductions  made each pay
period  during the  Offering  Period in an amount not less than one percent (1%)
and not more than ten percent (10%), in whole number percentage  increments,  of
such participant's  Compensation in each pay period. All payroll deductions made
by a  participant  shall be  credited to his or her  account  under the Plan.  A
participant  may not make any additional  payments into such account.  Except as
otherwise provided in this Section 6(a), all Employees granted options under the
Plan shall have the same rights and privileges.

     b) A participant may increase or decrease his or her payroll  deductions by
filing a new subscription  agreement at any time during an Offering Period.  The
change may not become  effective sooner than the next pay period after filing of
the subscription  agreement.  The Board or the committee administering the Plan,
at its discretion, may limit the number of participation rate changes during any
Offering Period and may, in its discretion, require up to five (5) business days
prior written notice.

     c) A participant may discontinue  his or her  participation  in the Plan as
provided in Section 10 hereof.

     d)  Notwithstanding  the foregoing,  to the extent necessary to comply with
Section  423(b)(8) of the Code and Section 6(a) hereof, a participant's  payroll
deductions may be decreased to zero percent (0%) at any time during the Offering
Period.  Payroll  deductions  shall  recommence  at the  rate  provided  in such
participant's  subscription  agreement at the  beginning  of the first  Offering
Period  which  is  scheduled  to end  in the  following  calendar  year,  unless
terminated by the participant as provided in Section 10 hereof.

     e) At the time of each exercise of a participant's  option, and at the time
any Common  Stock  issued  under the Plan to a  participant  is disposed of, the
participant must adequately  provide for the Company's  federal,  state or other
tax withholding obligations,  if any, that arise upon the exercise of the option
or the  disposition of the Common Stock.  At any time, the Company may, but will
not be obligated to,  withhold from the  participant's  compensation  the amount
necessary for the Company to meet applicable withholding obligations,  including
but not limited to, any  withholding  required to make  available to the Company
any tax deductions or benefits  attributable to the sale or early disposition of
Common Stock by the participant.

     7. GRANT OF OPTION.

     a) On the Offering Date of each  Offering  Period,  each eligible  Employee
participating in such Offering Period shall automatically be deemed to have been
granted an option to  purchase  on the  Purchase  Date a number of shares of the
Company's  Common Stock  determined  by dividing such  Employee's  Contributions
accumulated  prior to such  Purchase  Date  and  retained  in the  participant's
account as of the Purchase Date by eighty-five  percent (85%) of the fair market
value of the Company's  Common Stock on the Purchase  Date;  provided,  however,
that in no event shall an Employee be permitted to purchase during each Offering
Period more than 1,000 shares (subject to any adjustment pursuant to Section 18)
and provided  further that such purchase shall be subject to the limitations set
forth in Section 3(b). The fair market value of the Company's Common Stock shall
be determined as provided in Section 7(b).

     b) The fair  market  value of the  Company's  Common  Stock on a given date
shall be equal to the closing sales price of Common Stock on the date  preceding
the date of determination  (or, in the event that the Common Stock is not traded
on such date,  on the  immediately  preceding  trading date on which there was a
closing sales price), as reported by The Nasdaq National Market or, in the event
the Common Stock is listed on a stock exchange,  the fair market value per share
shall be the closing sales price on such exchange on the date preceding the date
of  determination  (or, in the event that the Common Stock is not traded on such
date, on the immediately preceding trading date), as reported in THE WALL STREET
JOURNAL.  In the  absence  of any  listing  of the  Common  Stock on The  Nasdaq
National Market or on any established  stock exchange,  the fair market value of
the Common Stock on a given date shall be determined in good faith by the Board.

     8.  EXERCISE OF OPTION.  Unless a  participant  withdraws  from the Plan as
provided in Section 10 hereof, his or her option for the purchase of shares will
be exercised  automatically on the Purchase Date of the Offering Period, and the
maximum  whole number of shares  subject to such option will be purchased at the
applicable  option  price  with  the  accumulated  Contributions  in  his or her
account,  subject to the  limitations  in this Plan.  The shares  purchased upon
exercise  of an  option  hereunder  shall be held in the  participant's  account
established  under  Section 5(c)  pursuant to Section  21(c) and Section  21(d).
During his or her lifetime,  a participant's option to purchase shares hereunder
is exercisable only by him or her.

     9.  DELIVERY.  As promptly as  practicable  after the Purchase Date of each
Offering  Period,  the Company shall arrange the delivery by direct deposit into
the account  established  for each  participant  under Section 5(c),  the shares
purchased  upon exercise of his or her option.  Any cash remaining to the credit
of a  participant's  account  under the Plan after a  purchase  by him or her of
shares on the Purchase Date, other than amounts representing  fractional shares,
will be  returned  to him or her as soon as  practicable.  Amounts  representing
fractional shares will be carried forward for use in subsequent purchases.

     10. VOLUNTARY WITHDRAWAL; TERMINATION OF EMPLOYMENT.

     a) A participant may withdraw from an Offering Period all but not less than
all the Contributions  credited to his or her account under the Plan at any time
prior to [five (5)]  business  days prior to the  Purchase  Date of the Offering
Period  by  completing  a Company  approved  notice  of  withdrawal.  All of the
participant's  Contributions  credited to his or her account will be paid to him
or her as soon as  practicable  after receipt of his or her notice of withdrawal
and his or her option of the current  period will be  automatically  terminated,
and no further  Contributions for the purchase of shares will be made during the
Offering  Period.  Payroll  deductions  shall not resume at the beginning of the
succeeding Offering Period unless the participant  delivers to the Company a new
subscription agreement in accordance with this Plan.

     b) A  participant's  withdrawal  from an offering  will not have any effect
upon his or her eligibility to participate in a succeeding Offering Period or in
any similar plan which may hereafter be adopted by the Company.

     c) Upon a  participant's  ceasing to be an Employee  prior to the  Purchase
Date of an Offering Period for any reason,  including  retirement or death,  the
Contributions credited to his or her account and not yet applied to the purchase
of shares will be  returned to him or her,  or, in the case of his or her death,
to the person or  persons  entitled  thereto  under  Section  14, and his or her
option will be automatically  terminated,  provided that if the Company does not
learn of such death more than five (5) business days prior to the Purchase Date,
payroll deductions  credited to the participant's  account may be applied to the
purchase of shares under the Plan on such Purchase Date.

     d) In the event an  Employee's  salary  grade level is elevated or title or
position  is  changed  so as to make an  Employee  a "senior  executive"  of the
Company during the Offering Period in which the Employee is a participant, he or
she will be deemed to have elected to withdraw  from the Plan and  Contributions
credited  to his or her  account  will be  returned to him or her and his or her
option terminated.

     11.  INTEREST.   No  interest  shall  accrue  on  the  Contributions  of  a
participant in the Plan.

     12. STOCK.

     a) The maximum  number of shares of the Company's  Common Stock which shall
be made available for purchase under the Plan shall be 250,000  shares,  subject
to  adjustment  upon  changes in  capitalization  of the  Company as provided in
Section 18 hereof.  These shares may be newly issued or may be purchased for the
Plan on the open market or from private  sources.  If the total number of shares
which would otherwise be subject to options granted  pursuant to Section 7(a) on
the  Offering  Date of an  Offering  Period  exceeds  the number of shares  then
available  under the Plan (after  deduction of all shares for which options have
been  exercised  or are then  outstanding),  the  Company  shall make a pro rata
allocation  of the shares  remaining  available for option grant in as uniform a
manner as shall be  practicable  and as it shall  determine to be equitable.  In
such event,  the Company  shall give  written  notice of such  reduction  of the
number of shares  subject to the option to each  Employee  affected  thereby and
shall similarly reduce the rate of Contributions, if necessary.


     b) The participant  will have no interest or voting right in shares covered
by his or her option until such option has been exercised.

     c)  Shares  to be  delivered  to a  participant  under  the  Plan  will  be
registered in the name of the  participant  or in the "Street Name" of a Company
approved broker, subject to Section 21 hereof.

     13.  ADMINISTRATION.  The Board, or a committee  named by the Board,  shall
supervise and administer the Plan and shall have full power to adopt,  amend and
rescind any rules deemed desirable and appropriate for the administration of the
Plan and not inconsistent with the Plan, to construe and interpret the Plan, and
to make all other  determinations  necessary or advisable for the administration
of the Plan. The  composition of the committee  shall be in accordance  with the
requirements  to obtain or retain any available  exemption from the operation of
Section 16(b) of the Exchange Act pursuant to Rule 16b-3 promulgated thereunder.
To aid in the administration of the Plan, the Board or the committee may appoint
a Plan  administrator  and allocate to it certain  limited  responsibilities  to
carry out the  directives  of the Board or the  committee  in all  phases of the
administration of the Plan.

     14. DESIGNATION OF BENEFICIARY.

     a) A participant may file a written  designation of a beneficiary who is to
receive shares and cash, if any, from the  participant's  account under the Plan
in the event of such  participant's  death  subsequent to the end of an Offering
Period but prior to delivery to him or her of such shares and cash. In addition,
a participant may file a written  designation of a beneficiary who is to receive
any cash  from the  participant's  account  under  the Plan in the event of such
participant's  death  prior to the  Purchase  Date of an Offering  Period.  If a
participant is married and the designated beneficiary is not the spouse, spousal
consent shall be required for such designation to be effective.

     b) Such  designation of beneficiary may be changed by the participant  (and
his or her spouse,  if any) at any time by written  notice.  In the event of the
death of a participant  and in the absence of a beneficiary  validly  designated
under  the  Plan who is  living  at the time of such  participant's  death,  the
Company shall  deliver such shares and/or cash to the executor or  administrator
of the estate of the participant,  or if no such executor or  administrator  has
been  appointed  (to  the  knowledge  of  the  Company),  the  Company,  in  its
discretion,  may deliver such shares  and/or cash to the spouse or to any one or
more dependents or relatives of the participant,  or if no spouse,  dependent or
relative is known to the  Company,  then to such other person as the Company may
designate.

     15.  TRANSFERABILITY.  Neither  Contributions  credited to a  participant's
account nor any rights  with  regard to the  exercise of an option or to receive
shares  under  the Plan  may be  assigned,  transferred,  pledged  or  otherwise
disposed  of  in  any  way  (other  than  by  will,  the  laws  of  descent  and
distribution,  or as provided in Section 14 hereof) by the participant. Any such
attempt at assignment,  transfer,  pledge or other  disposition shall be without
effect,  except that the Company may treat such act as election to withdraw  all
Contributions in accordance with Section 10 hereof.

     16. USE OF FUNDS. All  Contributions  received or held by the Company under
the Plan may be used by the Company for any corporate  purpose,  and the Company
shall not be obligated to segregate such Contributions.

     17. REPORTS. Individual accounts will be maintained for each participant in
the  Plan.  Statements  of  account  will be  given to  participating  Employees
promptly following the Purchase Date, which statements will set forth the amount
of Contributions,  the per share purchase price, the number of shares purchased,
the remaining cash balance, if any, and the dividends received,  if any, for the
period covered.

     18. ADJUSTMENTS UPON CHANGES IN CAPITALIZATION; CORPORATE TRANSACTIONS.

     a)  CHANGES  IN  CAPITALIZATION.  Subject  to any  required  action  by the
stockholders  of the Company,  the number of shares of Common  Stock  covered by
each option  under the Plan which has not yet been  exercised  and the number of
shares of Common Stock which have been  authorized  for issuance  under the Plan
but have not yet been placed under option  (collectively,  the  "Reserves"),  as
well as the price per share of Common  Stock  covered by each  option  under the
Plan which has not yet been exercised,  shall be appropriately  adjusted for any
changes in the Common Stock  resulting from a stock split,  reverse stock split,
stock  dividend,  combination or  reclassification  of the Common Stock,  or any
similar changes in the Company's  capitalization.  Such adjustment shall be made
by the Board or the committee  administering  this Plan, whose  determination in
that  respect  shall be final,  binding  and  conclusive.  Except  as  expressly
provided  herein,  no issue by the  Company of shares of stock of any class,  or
securities  convertible into shares of stock of any class,  shall affect, and no
adjustment by reason  thereof shall be made with respect to, the number or price
of shares of Common Stock subject to an option.

     b)  CORPORATE  TRANSACTIONS.  In the event of the proposed  dissolution  or
liquidation of the Company, the Offering Period will terminate immediately prior
to the  consummation of such proposed action,  unless otherwise  provided by the
Board. In the event of a proposed sale of all or substantially all of the assets
of the  Company,  or the merger of the Company into  another  corporation,  each
option  under  the Plan  shall  be  assumed  or an  equivalent  option  shall be
substituted  by such  successor  corporation  or a parent or  subsidiary of such
successor corporation,  unless the Board determines, in the exercise of its sole
discretion  and in lieu of such  assumption  or  substitution,  to  shorten  the
Offering  Period  then in  progress  by  setting a new  Purchase  Date (the "New
Purchase  Date").  If the Board shortens the Offering Period then in progress in
lieu of assumption or  substitution  in the event of a merger or sale of assets,
the Board shall notify each participant in writing, at least ten (10) days prior
to the New Purchase Date,  that the Purchase Date for his or her option has been
changed to the New  Purchase  Date and that his or her option will be  exercised
automatically on the New Purchase Date,  unless prior to such date he or she has
withdrawn  from the  Offering  Period as  provided  in Section  10  hereof.  For
purposes of this paragraph,  an option granted under the Plan shall be deemed to
have been assumed or substituted if, following the sale of assets or merger, the
option confers the right to purchase,  for each share of Common Stock subject to
the option  immediately prior to the sale of assets or merger, the consideration
(whether stock,  cash or other  securities or property)  received in the sale of
assets or merger by holders of Common  Stock for each share of Common Stock held
on the  effective  date of the  transaction  (and if such holders were offered a
choice of consideration,  the type of consideration chosen by the holders of the
majority of the outstanding shares of Common Stock); provided,  however, that if
such  consideration  received  in the sale of assets or  merger  was not  solely
common stock of the successor  corporation  or its parent (as defined in Section
424(e)  of the  Code),  the  Board  may,  with  the  consent  of  the  successor
corporation and the  participant,  provide for the  consideration to be received
upon  exercise  of the  option  to be  solely  common  stock  of  the  successor
corporation  or  its  parent  equal  in  fair  market  value  to the  per  share
consideration  received  by  holders  of  Common  Stock in the sale of assets or
merger.

     19. AMENDMENT OR TERMINATION.

     a) The  Board  may at any time  terminate  or amend  the  Plan.  Except  as
provided  in  Section  19, no such  termination  may affect  options  previously
granted,  nor may an amendment make any change in any option theretofore granted
which adversely affects the rights of any participant;  provided, that no shares
may be issued or sold pursuant to any amendment increasing the maximum number of
shares  issuable  under the Plan unless the  stockholders  of the  Company  have
approved the  amendment  within 12 months of its adoption by the Board.  If such
stockholder  approval is not obtained within such 12-month period, the amendment
shall be void and of no force or effect and the amounts  withheld from Employees
with respect to such increased shares shall be returned to them. In addition, to
the extent  necessary to comply with Rule 16b-3 under the Exchange Act, or under
Section 423 of the Code (or any  successor  rule or provision or any  applicable
law or  regulation),  the Company  shall obtain  stockholder  approval in such a
manner and to such a degree as so required.

     b)  Without  stockholder   approval  and  without  regard  to  whether  any
participant rights may be considered to have been adversely affected,  the Board
(or its committee) shall be entitled to change the Offering Periods and Purchase
Periods,  limit the frequency  and/or  number of changes in the amount  withheld
during an Offering  Period,  establish the exchange ratio  applicable to amounts
withheld in currency  other than U.S.  dollars,  permit  payroll  withholding in
excess of the amount  designated by a participant  in order to adjust for delays
or mistakes  in the  Company's  processing  of  properly  completed  withholding
elections, establish reasonable waiting and adjustment periods and/or accounting
and crediting  procedures to ensure that amounts  applied toward the purchase of
Common Stock for each participant properly correspond with amounts withheld from
the  participant's  Compensation,   and  establish  such  other  limitations  or
procedures as the Board (or its committee)  determines in its sole discretion as
advisable which are consistent with the Plan.

     20. NOTICES.  All notices or other  communications  by a participant to the
Company under or in  connection  with the Plan shall be deemed to have been duly
given when received in the form specified by the Company at the location,  or by
the person, designated by the Company for the receipt thereof.

     21. CONDITIONS UPON ISSUANCE OF SHARES.

     a) Shares shall not be issued with respect to an option unless the exercise
of such option and the  issuance and  delivery of such shares  pursuant  thereto
shall  comply  with all  applicable  provisions  of law,  domestic  or  foreign,
including,  without  limitation,  the  Securities  Act of 1933, as amended,  the
Exchange  Act,  the  rules  and  regulations  promulgated  thereunder,  and  the
requirements  of The Nasdaq National Market or any stock exchange upon which the
shares may then be  listed,  and shall be further  subject  to the  approval  of
counsel for the Company with respect to such compliance.

     b) As a condition of the exercise of an option, the Company may require the
person  exercising  such option to represent and warrant at the time of any such
exercise that the shares are being purchased only for investment and without any
present  intention  to sell or  distribute  such  shares  if, in the  opinion of
counsel  for  the  Company,  such a  representation  is  required  by any of the
aforementioned applicable provisions of law.

     c) Each participant  agrees, by enrolling in the Plan, to promptly give the
Company  prior  written   notice  of  any  withdrawal  of  shares  held  in  the
participant's  account  established  under Section 5(c), or any  disposition  of
shares  purchased under the Plan,  where such  withdrawal or disposition  occurs
within  two (2) years  after the date of grant of the option  pursuant  to which
such shares were  purchased,  provided that any such  withdrawal or  disposition
shall be subject to Section 21(d).

     d) Prior to the participant's termination of employment with the Company, a
participant may withdraw some or all of the whole shares of Common Stock held in
the participant's  account established under Section 5(c), provided that, unless
the Board or the committee  administering the Plan otherwise permits in its sole
discretion,  each participant  agrees,  by enrolling in the Plan, that he or she
may not withdraw any shares of Common Stock  purchased  under the Plan until six
(6) months have expired  following  the Purchase  Date on which such shares were
purchased.

     22. TERM OF PLAN;  EFFECTIVE DATE. The Plan shall become effective upon the
earlier  to  occur  of  its  adoption  by  the  Board  or  its  approval  by the
stockholders of the Company.  It shall continue in effect for a term of ten (10)
years unless sooner  terminated under Section 19 hereof.  However,  no shares of
Common  Stock may be issued or sold until the  stockholders  of the Company have
approved  the Plan  within 12  months  of its  adoption  by the  Board.  If such
stockholder approval is not obtained within such 12-month period, the Plan shall
be void and of no force or effect and the amounts  withheld from Employees shall
be returned to them.

     23.  ADDITIONAL  RESTRICTIONS  OF RULE 16B-3.  The terms and  conditions of
options granted  hereunder to, and the purchase of shares by, persons subject to
Section 16 of the Exchange Act shall comply with the  applicable  provisions  of
Rule  16b-3.  This plan  shall be  deemed to  contain,  and such  options  shall
contain,  and the shares issued upon exercise  thereof shall be subject to, such
additional  conditions  and  restrictions  as may be  required  by Rule 16b-3 to
qualify for the  maximum  exemption  from  Section 16 of the  Exchange  Act with
respect to Plan transactions.

<PAGE>

                                   EXHIBIT B

                              EXPRESS SCRIPTS, INC.
                      EXECUTIVE DEFERRED COMPENSATION PLAN


1.         PURPOSE

     The purpose of this Express Scripts,  Inc. Executive Deferred  Compensation
Plan (the "Plan") is to provide  eligible  key  employees of the Company with an
opportunity  to defer  compensation  to be earned by them from the  Company as a
means of saving for  retirement  or other  future  purposes  and to provide such
employees with  competitive  retirement and capital  accumulation  benefits.  In
addition,  the Plan is intended to provide  eligible  key  employees  additional
incentive   to  remain   employed  by  the   Company  and  to  attract   certain
executive-level employees.

2.     DEFINITIONS

     The following definitions shall be applicable throughout the Plan:

     2.1   ACCOUNTING DATE.

     "Accounting Date" means each Business Day on which a calculation concerning
a Participant's  Compensation  Account is performed,  or as otherwise defined by
the Committee.

     2.2   BASIC COMPANY CREDIT.

     "Basic Company Credit" means an amount, if any, credited to a Participant's
Retirement Account as described in Section 7.

     2.3   BENEFICIARY.

     "Beneficiary"  means the person or persons designated by the Participant in
accordance  with Section 10, or if no person or persons are so  designated,  the
estate of a deceased Participant.

     2.4   BOARD.

     "Board"  means the Board of  Directors  of  Express  Scripts,  Inc.  or its
designee.

     2.5   BUSINESS DAY.

     Business Day" means a day on which the New York Stock  Exchange is open for
trading activity.

     2.6   COMMITTEE.

     "Committee" means the Compensation Committee of the Board.

     2.7   COMMON STOCK.

     "Common Stock" means the Class A Common Stock,  $0.01 par value, of Express
Scripts, Inc.

     2.8   COMMON STOCK FUND.

     "Common  Stock  Fund"  means  that  investment  option,   approved  by  the
Committee,  in which a Participant's  Compensation  Accounts may be deemed to be
invested  and  may  earn  income  (or  incur  losses)  based  on a  hypothetical
investment in Common Stock.

     2.9   COMPANY.

     "Company"  means Express  Scripts,  Inc., its divisions,  subsidiaries  and
affiliates.

     2.10  COMPANY CREDITS.

     "Company Credits" means amounts credited as either Basic Company Credits or
Past  Service  Credits by the  Company  to  Compensation  Accounts,  in the sole
discretion of the Committee, pursuant to Section 7.

     2.11  COMPENSATION.

     "Compensation" means any employee compensation  determined by the Committee
to be properly deferrable under the Plan.

     2.12  COMPENSATION ACCOUNT(S).

     "Compensation   Account(s)"   means  the  Retirement   Account  and/or  the
In-Service Accounts.

     2.13  CREDIT DATE.

     "Credit Date" means each date on which Deferred Compensation is credited to
Compensation Accounts in accordance with rules prescribed by the Committee.

     2.14  DEFERRED COMPENSATION.

     "Deferred  Compensation" means the Compensation  elected by the Participant
to be deferred pursuant to the Plan.

     2.15  DISABILITY.

     "Disability" means  qualification for disability benefits under a long-term
disability  plan under which a Participant is covered and which is maintained by
the Company.

     2.16 EFFECTIVE DATE.

     "Effective Date" means January 1, 1999.

     2.17 ELECTION.

     "Election"  means a Participant's  delivery of a written notice of election
to the  Committee  or its  designee  electing  to defer  payment of a  specified
percentage of his or her  Compensation  (in accordance with rules  prescribed by
the  Committee)  either  until  Retirement,  death or such other time as further
permitted by the Committee.

     2.18 EMPLOYEE.

     "Employee" means an individual  classified by the Committee as a full-time,
regular  salaried  employee of the  Company,  its present and future  subsidiary
corporations as defined in Section 424 of the Internal  Revenue Code of 1986, as
amended, or its affiliates.

     2.19 EXCHANGE ACT.

     "Exchange Act" means the Securities Exchange Act of 1934, as amended.

     2.20 FAIR MARKET VALUE.

     "Fair Market Value"  means,  as of any  specified  date,  the closing sales
price of a share of Common Stock,  as reported on the Nasdaq  National Market on
that date (or, if there are no sales on that date,  the last  preceding  date on
which there was a sale),  or, in the event the Common Stock is listed on a stock
exchange,  the closing  sales price of a share of Common  Stock,  as reported on
such  exchange  on that date (or,  if there are no sales on that date,  the last
preceding date on which there was a sale).  In the absence of any listing of the
Common Stock on the Nasdaq National Market or on any established stock exchange,
Fair  Market  Value  means  the fair  market  value of the  Common  Stock on any
specified date as determined in good faith by the Committee.

     2.21 IN-SERVICE ACCOUNT.

     "In-Service  Account"  means the account or accounts to which a Participant
elects to contribute Deferred  Compensation and from which,  pursuant to Section
8.2, distributions are made.

     2.22 PARTICIPANT.

     "Participant" means an Employee selected by the Committee to participate in
the Plan who has  elected  to defer  payment  of all or a portion  of his or her
Compensation under the Plan.

     2.23 PAST SERVICE CREDIT.

     "Past Service Credit" means an amount,  if any, credited to a Participant's
Retirement Account as described in Section 7.

     2.24 PLAN.

     "Plan" means this Express Scripts,  Inc.  Executive  Deferred  Compensation
Plan, as amended from time to time.

     2.25 PLAN YEAR.

     "Plan Year"  means the annual  period  commencing  January 1 and ending the
following December 31.

     2.26 RETIREMENT.

     "Retirement"  means a  Participant's  termination of employment on or after
age 57 or upon  attaining  age 55 with ten (10)  Service  Years in a position at
least as senior as a senior vice-president.

     2.27 RETIREMENT ACCOUNT.

     "Retirement  Account"  means the account to which a  Participant  elects to
contribute Deferred Compensation and to which Company Credits are made, and from
which, pursuant to Section 8.1, distributions are made.

     2.28  SERVICE YEAR.

     "Service Year" means, as designated by the Committee,  such year or portion
thereof during which the services have been rendered by a Participant  for which
Compensation is payable.

     2.29 STOCK UNIT(S).

     "Stock  Unit(s)" means the share  equivalents  credited to the Common Stock
Fund of a  Participant's  Compensation  Account in accordance with Sections 5, 6
and 7.

     2.30  TERMINATION.

     "Termination"  means  termination of services as an Employee for any reason
other than Retirement. In the event of a Participant's Disability, a Termination
will be  deemed  to  have  occurred  as of the  earlier  of (a) the  Committee's
determination  that a Participant  has  experienced a termination of services or
(b) the date  which is nine (9)  months  after the date the  Participant  begins
receiving  disability  benefits under a long-term  disability plan maintained by
the Company.

3.    ADMINISTRATION

     Full power and  authority to construe,  interpret and  administer  the Plan
shall be vested in the Committee.  This power and authority includes, but is not
limited to,  selecting  which Employees are eligible to participate in the Plan,
selecting  Compensation  eligible for deferral,  selecting  investment  indices,
establishing  the level of Company  Credits  (if any) to the Plan,  establishing
deferral terms and conditions,  receiving and approving beneficiary  designation
forms,  and adopting  modifications,  amendments and procedures as may be deemed
necessary,  appropriate  or  convenient  by  the  Committee.  Decisions  of  the
Committee  shall  be  final,  conclusive  and  binding  upon  all  parties.  The
Committee, in its sole discretion, may delegate day-to-day administration of the
Plan  to  an  employee  or  employees  of  the  Company  or  to  a   third-party
administrator.  The  Committee  may also rely on  outside  counsel,  independent
accountants  or other  consultants  or  advisors  for advice and  assistance  in
fulfilling its administrative duties under the Plan.

4.    ELIGIBILITY

     The  Committee  shall have the  authority  to select  from  senior and vice
president-level  executives those Employees who shall be eligible to participate
in the Plan.

5.     PARTICIPANT ACCOUNTS

     Upon a  Participant's  initial  election to participate in the Plan,  there
shall  be  established  a  Retirement  Account  and an  In-Service  Account,  as
designated  by the  Participant,  to which there shall be credited  any Deferred
Compensation as of each Credit Date. In addition,  Company Credits, if any, made
pursuant to Section 7 shall be allocated to a Participant's  Retirement  Account
in accordance  with rules  prescribed by the Committee.  Each such  Compensation
Account shall be credited (or debited) on each  Accounting  Date with income (or
loss) based upon a hypothetical  investment in any one or more of the investment
options  available  under the  Plan,  as  prescribed  by the  Committee  for the
particular  Compensation  credited,  which may include a Common Stock Fund. If a
Participant  elects  to invest  all or any  portion  of his or her  Compensation
Account(s)  in  the  Common  Stock  Fund,  that  portion  of  the  Participant's
Compensation  Account(s)  shall be credited on each Credit Date with Stock Units
equal to the number of shares of Common Stock  (including  fractions of a share)
that could have been purchased with the amount of such Deferred  Compensation at
the Fair Market Value on the Credit Date. As of any date for the payment of cash
dividends on the Common  Stock,  the portion of the  Participant's  Compensation
Account(s)  invested  in the Common  Stock Fund as of the  dividend  record date
shall be credited  with  additional  Stock Units  calculated by dividing (i) the
product of (a) the dollar value of the  dividend  declared in respect of a share
of Common  Stock  multiplied  by (b) the number of Stock  Units  credited to the
Participant's Compensation Account(s) as of the dividend record date by (ii) the
Fair Market Value of a share of Common Stock on the dividend payment date.

6.     ELECTION TO PARTICIPATE
     
     Any Employee selected by the Committee to participate in the Plan may elect
to do so by  delivering  to the  Committee or its designee an Election on a form
prescribed by the Committee,  designating the Compensation  Account to which the
Deferred  Compensation  is to be  credited,  electing  the  timing  and  form of
distribution  (if  applicable),  and  setting  forth the  manner  in which  such
Deferred  Compensation  shall  be  invested  in  accordance  with  Section  5. A
Participant's initial Election must be filed within thirty (30) days of the date
on which the  Participant  becomes  eligible to  participate  in the Plan.  Such
initial  Election  shall  only be  effective  as to the Plan Year to which  such
Election  relates.  A Participant must submit a new Election for each subsequent
Plan Year in order to defer Compensation. Such subsequent Election must be filed
at least  thirty (30) days prior to the first day of the Plan Year to which such
Election relates. An effective Election may not be revoked or modified except as
otherwise determined by the Committee or as stated in the Plan.

     6.2     INVESTMENT   ALTERNATIVES   FOR   EXISTING

     A  Participant  may  elect  to  change  an  existing  selection  as to  the
investment  alternatives  in effect  with  respect to an  existing  Compensation
Account (in  increments  prescribed by the  Committee)  as often,  and with such
restrictions, as determined by the Committee.

7.   COMPANY CREDITS

     In the sole discretion of the Committee,  in a given Plan Year, the Company
may  credit  a  specified  percentage  of a  Participant's  Compensation  to the
Participant's  Retirement Account as a Basic Company Credit.  The Committee,  in
its sole  discretion,  may cause the Company to credit such Basic Company Credit
for all or any  portion of the  participants  in the Plan in such Plan Year.  In
addition, the Committee may cause the Company to credit a Past Service Credit to
recognize  past  service  as  the  Committee,  in  its  sole  discretion,  deems
appropriate. Such Basic Company Credit and Past Service Credit, if any, shall be
credited  to a  Participant's  Retirement  Account  and shall be  subject to the
limitations  determined  appropriate by the Committee,  including the limitation
contained in Section 8.3 and the limitations described below in this Section 7.

     7.1       VESTING.

     A  Participant's  Deferred  Compensation  shall be immediately  one-hundred
percent  (100%)   nonforfeitable  upon  being  credited  to  such  Participant's
Retirement or In-Service Account.

     A  Participant's  Basic  Company  Credit  for  a  Plan  Year  shall  become
nonforfeitable  three  (3) years  after  the end of the Plan Year to which  such
Basic Company Credit relates.

     A  Participant's   Past  Service  Credit  shall  be   fifty-percent   (50%)
nonforfeitable  upon  being  credited  to  his or her  Retirement  Account.  The
remaining  fifty-percent (50%) shall become  nonforfeitable as follows:  one (1)
year after the end of the Plan Year in which the Past Service Credit is credited
to the  Participant's  Retirement  Account,  the Participant  shall be one-third
(1/3) vested in the remaining  fifty percent (50%);  two (2) years after the end
of  the  Plan  Year  in  which  the  Past  Service  Credit  is  credited  to the
Participant's  Retirement  Account,  the Participant  shall be two-thirds  (2/3)
vested in the remaining  fifty percent (50%);  and three (3) years after the end
of  the  Plan  Year  in  which  the  Past  Service  Credit  is  credited  to the
Participant's  Retirement Account,  the Participant shall be one-hundred percent
(100%) vested in the remaining fifty percent (50%).

     Upon a  Participant's  termination  of  employment  for any reason prior to
attaining age 57, he or she shall forfeit any nonvested benefits.  A Participant
shall have a one-hundred  percent (100%)  nonforfeitable  right to Basic Company
Credits and Past Service Credits upon attaining age 57.

     7.2    FORFEITURE.

     Upon a Participant's  Termination or Retirement,  the Company  reserves the
right to withhold  payment of a portion of a  Participant's  Retirement  Account
attributable to Basic Company Credits or Past Service Credits made under Section
7 (and  earnings  thereon)  in the  event  the  Committee  determines  that  the
Participant has violated the Company's standard noncompetition and nondisclosure
agreement or any other  employment  agreement  executed by the  Participant,  or
otherwise  acts  against the  interests  of the Company,  as  determined  by the
Committee in its sole discretion.

8.    DISTRIBUTION

     8.1     RETIREMENT ACCOUNT.

     In the event of a Participant's  Retirement,  the Participant's  Retirement
Account  shall  be  distributed  at the time and in the  manner  elected  by the
Participant  in his  or her  initial  Election.  If no  Election  is  made  by a
Participant  as to the timing of  distribution  or form of payment of his or her
Retirement Account, upon the Participant's Retirement such account shall be paid
in a single lump sum.

     8.2     IN-SERVICE ACCOUNT.

     Deferred Compensation credited to a Participant's  In-Service Account shall
be distributed  at the time and in the manner elected by the  Participant in his
or  her  Election.  A  Participant  may  not  change  the  Election  as  to  the
distribution of Deferred Compensation in his or her In-Service Account except as
otherwise permitted in Section 9.

     8.3    TERMINATION.

     In the event of a Participant's Termination, the Participant's Compensation
Accounts shall be  distributed in a single lump sum to such  Participant as soon
as administratively practicable following his or her Termination.

     8.4    DEATH.

     In the event of the Participant's  death (a) while in the employment of the
Company or (b) after the  Participant's  Termination but prior to the payment of
such  Participant's  Compensation  Accounts pursuant to Section 8.3, the Company
shall pay the following  amounts to the  Participant's  Beneficiary  in a single
lump sum:

     (1) the remaining amounts,  if any, in a Participant's  In-Service Account;
and

     (2) the amounts in the Participant's Retirement Account.

     In the event of the Participant's death following  Retirement,  the Company
shall  pay  the  amount  in  the   Participant's   Retirement   Account  to  the
Participant's Beneficiary in the form and at the time elected by the Participant
pursuant to Section 6.1.

     8.5 FORM OF DISTRIBUTION.

     Distribution  of a  Participant's  Compensation  Accounts  shall be made in
cash;  provided  that,  any  amounts in a  Participant's  Compensation  Accounts
invested in the Common Stock Fund shall be  distributed  to the  Participant  in
wholes shares of Common Stock with fractional shares paid in cash.

9.       FINANCIAL HARDSHIP

     Upon  the  written  request  of  a  Participant  or a  Participant's  legal
representative  and  a  finding  that  continued  deferral  will  result  in  an
unforeseeable financial emergency to the Participant, the Committee (in its sole
discretion)  may authorize  (a) the payment of all or a part of a  Participant's
Compensation Accounts representing Deferred Compensation and earnings thereon in
a single  lump sum prior to his or her  ceasing  to be a  Participant,  or (b) a
Participant to cease  contributing  Deferred  Compensation  to the Plan during a
Plan Year. It is intended that the Committee's  determinations as to whether the
Participant has suffered an  "unforeseeable  financial  emergency" shall be made
consistent with the  requirements  under Section 457(d) of the Internal  Revenue
Code of 1986, as amended.

10. BENEFICIARY DESIGNATION

     A Participant may designate one or more persons (including a trust) to whom
or to which  payments are to be made if the  Participant  dies before  receiving
distribution of all amounts due under the Plan. A Participant  may, at any time,
elect to change the  designation of a Beneficiary.  A designation of Beneficiary
will be effective only after the signed designation of Beneficiary is filed with
the Committee or its designee while the Participant is alive and will cancel all
designations of Beneficiary  signed and filed earlier.  If the Participant fails
to  designate  a  Beneficiary  as  provided  above or if all of a  Participant's
Beneficiaries  predecease  him or her and he or she  fails  to  designate  a new
Beneficiary,  the remaining  unpaid amounts shall be paid in one lump sum to the
estate of such  Participant.  If all  Beneficiaries of the Participant die after
the Participant but before  complete  payment of all amounts due hereunder,  the
remaining unpaid amounts shall be paid in one lump sum to the estate of the last
to die of such Beneficiaries.

11.     UNSECURED GENERAL CREDITOR STATUS OF EMPLOYEE

     The payments to  Participants  and their  Beneficiaries  hereunder shall be
made from the general corporate assets of the Company.  No person shall have any
interest  in any such  assets by  virtue of the  provisions  of this  Plan.  The
Company's obligation hereunder shall be an unfunded and unsecured promise to pay
money in the future.  To the extent that any person  acquires a right to receive
payments from the Company under the  provisions  hereof,  such right shall be no
greater than the right of any unsecured general creditor of the Company; no such
person shall have nor acquire any legal or equitable right, interest or claim in
or to any property or assets of the Company.  Any accounts maintained under this
Plan shall be  hypothetical  in nature and shall be maintained  for  bookkeeping
purposes  only.  Neither the Plan nor any account shall hold any actual funds or
assets.

12.    SHARES;  ADJUSTMENTS IN EVENT OF CHANGES IN CAPITALIZATION

     An aggregate of 50,000 shares of Common Stock have been initially allocated
to the Plan and  reserved  for the  distribution  of  Compensation  Accounts  as
described  in Section  8.5,  subject to  adjustment  under this  Section 12. The
Company may, in its discretion,  use shares held in the Treasury under this Plan
in lieu of authorized but unissued shares of Common Stock.

     In the event of any change in the  outstanding  Common Stock of the Company
by  reason  of  any  stock  split,  share  dividend,  recapitalization,  merger,
consolidation,  reorganization,  combination, or exchange or reclassification of
shares, split-up,  split-off,  spin-off,  liquidation or other similar change in
capitalization,  or any  distribution  to common  shareholders  other  than cash
dividends,  the  number or kind of shares or Stock  Units  that may be  credited
under  the  Plan  shall be  automatically  adjusted  so that  the  proportionate
interest of the  Participants  shall be maintained  as before the  occurrence of
such event.  Such adjustment shall be conclusive and binding for all purposes of
the Plan.

13.      INALIENABILITY OF BENEFITS

     The interests of the  Participants and their  Beneficiaries  under the Plan
may not in any way be voluntarily  or  involuntarily  transferred,  alienated or
assigned,  nor  subject  to  attachment,  execution,  garnishment  or other such
equitable  or legal  process.  A  Participant  or  Beneficiary  cannot waive the
provisions of this Section 13.

14.       GOVERNING LAW

     The  provisions  of  this  plan  shall  be  interpreted  and  construed  in
accordance  with  the  laws of the  State  of  Missouri,  except  to the  extent
preempted by Federal law.

15.       AMENDMENTS

         The Committee may amend, alter or terminate this Plan at any time
without the prior approval of the Board; provided, however, that the Committee
may not, without approval by the Board, materially increase the benefits
accruing to Participants under the Plan.

     IN  WITNESS  WHEREOF,   the  Express  Scripts,   Inc.   Executive  Deferred
Compensation Plan is effective as of January 1, 1999.

                                  EXPRESS SCRIPTS, INC.


                                  By:/s/ Barrett Toan

                                  Title: President

<PAGE>

                                    EXHIBIT C

                               THIRD AMENDMENT TO
        EXPRESS SCRIPTS, INC. AMENDED AND RESTATED 1994 STOCK OPTION PLAN

                                    RECITALS

     A. Express Scripts,  Inc. (the  "Corporation")  has an Amended and Restated
1994 Stock  Option  Plan,  which was amended and  restated on March 22, 1995 and
approved by the stockholders on May 24, 1995, and which was subsequently amended
by the Board of Directors of the  Corporation  (the "Board") on January 29, 1997
and  January 27,  1998,  and such  subsequent  amendments  were  approved by the
stockholders on May 28, 1997 and May 27, 1998, respectively (the "1994 Plan").

     B. On March 24,  1999,  the Board  approved  an  increase  in the number of
shares  that  the  Company  may  issue  pursuant  to the 1994  Plan and  certain
additional amendments to the 1994 Plan.

                                    AMENDMENT

     1. DEFINITIONS.  Capitalized terms set forth in this Third Amendment to the
1994 Plan (the "Third Amendment") shall be as defined in the 1994 Plan.

     2. AMENDMENT TO SECTION 1, DEFINITION OF "EARLY RETIREMENT". The definition
of the term  "Early  Retirement"  in  Section 1 of the 1994 Plan is  amended  by
inserting at the end of clause (ii) the additional language set forth below:

     , provided,  however, that a non-qualified deferred compensation plan shall
not be deemed to be a pension plan for purposes of this definition.

     3.  AMENDMENT  TO  SECTION  1,  DEFINITION  OF  "NORMAL  RETIREMENT".   The
definition  of the term  "Normal  Retirement"  in  Section 1 of the 1994 Plan is
amended by inserting at the end of clause (ii) the additional language set forth
below:

     , provided,  however, that a non-qualified deferred compensation plan shall
not be deemed to be a pension plan for purposes of this definition.

     4. AMENDMENT TO SECTION 1, DEFINITION OF "PLAN". The definition of the term
"Plan" in Section 1 of the 1994 Plan is amended by deleting  such  definition in
its entirety and replacing it with the language set forth below:

     "Plan"  shall mean this Express  Scripts,  Inc.  Amended and Restated  1994
Stock Option Plan, as amended from time to time.

     5.  AMENDMENT TO SECTION 2.1,  SHARES  SUBJECT TO PLAN.  Section 2.1 of the
1994 Plan is amended to read as follows in its entirety:

     The maximum number of Shares that may be issued or transferred  pursuant to
Options under this Plan shall be  2,920,000,  which has been adjusted to reflect
the stock  split  effected  on October 30,  1998.  Such  number of Shares  shall
increase annually, effective as of each January 1, commencing on January 1, 2000
and  ending on January 1,  2004,  by an amount  equal to one (1)  percent of the
Company's total  outstanding  shares of Class A and Class B Common Stock on such
date.  The Company  shall  reserve such number of Shares for the purposes of the
Plan out of its  authorized  but  unissued  Shares or out of Shares  held in the
Company's treasury,  or partly out of each. If any Shares that have been subject
to an Option cease to be subject thereto,  or any Restricted  Shares received by
an  Optionee  upon the  exercise  of an Option are  forfeited  to the Company in
accordance  with the Option  Agreement,  such Shares may again be the subject of
Options hereunder.

     6. AMENDMENT TO SECTION 2.2,  CHANGES IN COMPANY'S  SHARES.  Section 2.2 of
the 1994 Plan is hereby amended by inserting at the end of the single  paragraph
of such section the additional language set forth below:

     and  adjustments of the limitation in Section 3(b) of the maximum number of
Shares subject to Options that may be granted to any Employee.

     7. AMENDMENT TO SECTION 3, ELIGIBILITY FOR OPTION GRANTS.  Section 3 of the
1994 Plan is hereby  amended  by  deleting  paragraph  (b) in its  entirety  and
replacing  it with the  language  set forth  below to  reflect  the stock  split
effected on October 30, 1998:

     (b) determine the number of Shares to be subject to each Option  granted to
such selected Employees;  provided, that in no event shall Options be granted to
any Employee in excess of 300,000;

     8.  AMENDMENT TO SECTION 4.4,  METHOD OF EXERCISE.  Section 4.4 of the 1994
Plan is hereby amended by deleting the second sentence  thereof and replacing it
with the language set forth below:

     The purchase price for any Shares purchased  pursuant to the exercise of an
Option  shall be paid in full upon such  exercise  in cash,  by check or, at the
discretion of the Committee and upon such terms and  conditions as the Committee
shall approve, by transferring previously owned Shares to the Company (including
by way of attestation of the Optionee's ownership of such Shares), having Shares
withheld  or  exercising  pursuant to a "cashless  exercise"  procedure,  or any
combination thereof.

     9.  AMENDMENT TO SECTION 6.1,  COMPENSATION  COMMITTEE.  Section 6.1 of the
1994 Plan is hereby  amended  by  deleting  such  section  in its  entirety  and
replacing it with the language set forth below:

     6.1 COMPENSATION COMMITTEE

     The Plan shall be  administered  by the Committee which shall consist of at
least three directors of the Company,  appointed by the Board and holding office
at the  pleasure of the Board.  All  Committee  members  shall be members of the
Board.

     10.  EFFECTIVE  DATE OF THE  THIRD  AMENDMENT;  STOCKHOLDER  APPROVAL.  The
effective  date of this  Third  Amendment  shall be March 24,  1999.  This Third
Amendment  shall  be  submitted  for the  approval  of the  stockholders  of the
Corporation  at the next annual  meeting  thereof on May 26,  1999,  and, if not
approved by the stockholders, this Third Amendment shall be null and void.

<PAGE>

                                    EXHIBIT D

                               FIRST AMENDMENT TO
        EXPRESS SCRIPTS, INC. AMENDED AND RESTATED 1992 STOCK OPTION PLAN

                                    RECITALS

     A. Express Scripts,  Inc. (the  "Corporation")  has an Amended and Restated
1992 Stock  Option Plan (the "1992  Plan"),  which was  amended and  restated on
March 22, 1995 and approved by the stockholders on May 24, 1995.

     B. On March 24, 1999,  the Board of Directors of the  Corporation  approved
certain amendments to the 1992 Plan.

                                    AMENDMENT

     1. DEFINITIONS.  Capitalized terms set forth in this First Amendment to the
1992 Plan (the "First Amendment") shall be as defined in the 1992 Plan.

     2. AMENDMENT TO SECTION 1, DEFINITION OF "EARLY RETIREMENT". The definition
of the term  "Early  Retirement"  in  Section 1 of the 1992 Plan is  amended  by
inserting at the end of clause (ii) the additional language set forth below:

     , provided,  however, that a non-qualified deferred compensation plan shall
not be deemed to be a pension plan for purposes of this definition.

     3.  AMENDMENT  TO  SECTION  1,  DEFINITION  OF  "NORMAL  RETIREMENT".   The
definition  of the term  "Normal  Retirement"  in  Section 1 of the 1992 Plan is
amended by inserting at the end of clause (ii) the additional language set forth
below:

     , provided,  however, that a non-qualified deferred compensation plan shall
not be deemed to be a pension plan for purposes of this definition.

     4. AMENDMENT TO SECTION 1, DEFINITION OF "PLAN". The definition of the term
"Plan" in Section 1 of the 1992 Plan is amended by deleting  such  definition in
its entirety and replacing it with the language set forth below:

     "Plan"  shall mean this Express  Scripts,  Inc.  Amended and Restated  1992
Stock Option Plan, as amended from time to time.

     5.  AMENDMENT TO SECTION 2.1,  SHARES  SUBJECT TO PLAN.  Section 2.1 of the
1992 Plan is amended to read as follows in its entirety:

     The maximum number of Shares that may be issued or transferred  pursuant to
Options under this Plan shall be  2,380,000,  which has been adjusted to reflect
the stock split  effected on October 30, 1998.  The Company  shall  reserve such
number of Shares for the purposes of the Plan out of its authorized but unissued
Shares or out of Shares held in the Company's  treasury,  or partly out of each.
If any Shares that have been subject to an Option  cease to be subject  thereto,
or any Restricted  Shares received by an Optionee upon the exercise of an Option
are  forfeited  to the Company in  accordance  with the Option  Agreement,  such
Shares may again be the subject of Options hereunder.

     6. AMENDMENT TO SECTION 2.2,  CHANGES IN COMPANY'S  SHARES.  Section 2.2 of
the 1992 Plan is hereby amended by inserting at the end of the single  paragraph
of such section the additional language set forth below:

     and  adjustments of the limitation in Section 3(b) of the maximum number of
Shares subject to Options that may be granted to any Employee.

     7. AMENDMENT TO SECTION 3, ELIGIBILITY FOR OPTION GRANTS.  Section 3 of the
1992 Plan is hereby  amended  by  deleting  paragraph  (b) in its  entirety  and
replacing  it with the  language  set forth  below to  reflect  the stock  split
effected on October 30, 1998:

     (b) determine the number of Shares to be subject to each Option  granted to
such selected Employees;  provided, that in no event shall Options be granted to
any Employee in excess of 800,000;

     8.  AMENDMENT TO SECTION 4.4,  METHOD OF EXERCISE.  Section 4.4 of the 1992
Plan is hereby amended by deleting the second sentence  thereof and replacing it
with the language set forth below:

     The purchase price for any Shares purchased  pursuant to the exercise of an
Option  shall be paid in full upon such  exercise  in cash,  by check or, at the
discretion of the Committee and upon such terms and  conditions as the Committee
shall approve, by transferring previously owned Shares to the Company (including
by way of attestation of the Optionee's ownership of such Shares), having Shares
withheld  or  exercising  pursuant to a "cashless  exercise"  procedure,  or any
combination thereof.

     9.  AMENDMENT TO SECTION 6.1,  COMPENSATION  COMMITTEE.  Section 6.1 of the
1992 Plan is hereby  amended  by  deleting  such  section  in its  entirety  and
replacing it with the language set forth below:

     6.1 COMPENSATION COMMITTEE

     The Plan shall be  administered  by the Committee which shall consist of at
least three directors of the Company,  appointed by the Board and holding office
at the  pleasure of the Board.  All  Committee  members  shall be members of the
Board.

     10.  EFFECTIVE  DATE OF THE  FIRST  AMENDMENT;  STOCKHOLDER  APPROVAL.  The
effective  date of this  First  Amendment  shall be March 24,  1999.  This First
Amendment  shall  be  submitted  for the  approval  of the  stockholders  of the
Corporation  at the next annual  meeting  thereof on May 26,  1999,  and, if not
approved by the stockholders, this First Amendment shall be null and void.

<PAGE>

                                    EXHIBIT E

    FOURTH AMENDMENT TO EXPRESS SCRIPTS, INC. AMENDED AND RESTATED 1994 STOCK
                                  OPTION PLAN

                                    RECITALS

     A. Express Scripts,  Inc. (the  "Corporation")  has an Amended and Restated
1994 Stock  Option  Plan,  which was amended and  restated on March 22, 1995 and
approved by the stockholders on May 24, 1995, and which was subsequently amended
by the Board of Directors of the  Corporation  (the "Board") on January 29, 1997
and  January 27,  1998,  and such  subsequent  amendments  were  approved by the
stockholders on May 28, 1997 and May 27, 1998, respectively (the "1994 Plan").

     B. On March 24,  1999,  the Board  approved  an  increase  in the number of
shares  that  the  Company  may  issue  pursuant  to the 1994  Plan and  certain
additional amendments to the 1994 Plan.

     C. On March 24, 1999, the Board approved certain  additional  amendments to
the 1994 Plan  pursuant to the  Employment  Agreement  dated as of April 1, 1999
between the Corporation and Barrett A. Toan.

                                    AMENDMENT

     1. DEFINITIONS. Capitalized terms set forth in this Fourth Amendment to the
1994 Plan (the "Fourth Amendment") shall be as defined in the 1994 Plan.

     2.  AMENDMENT  TO  SECTION  1,  DEFINITION  OF  "CHANGE  IN  CONTROL".  The
definition  of the term  "Change  in  Control"  in Section 1 of the 1994 Plan is
hereby amended by adding the following sentence to the end of such definition:

     Notwithstanding anything to the contrary herein, "Change in Control" or any
other  substantially  similar term that is defined in the  Employment  Agreement
shall have the meaning given such term in the  Employment  Agreement in order to
give effect to the provisions of such Agreement.

     3.  AMENDMENT  TO SECTION 1,  DEFINITION  OF  "EMPLOYMENT  AGREEMENT".  The
definition  of the term  "Employment  Agreement" is hereby added to Section 1 of
the 1994 Plan as set forth below:

     "Employment   Agreement"  shall  mean  that  certain  employment  agreement
effective as of April 1, 1999 between Barrett A. Toan and Express Scripts, Inc.,
as such agreement may be amended from time to time.

     4. AMENDMENT TO SECTION 4.2. Section 4.2 of the 1994 Plan is hereby amended
by adding a new Section 4.2(e) as set forth below:

     (e)  EMPLOYMENT  AGREEMENT.  To the extent that the  provisions  of Section
4.2(c), Section 4.2(d) or any Option Agreement evidencing outstanding Options or
Restricted Shares conflict with any provisions of the Employment Agreement,  the
Employment  Agreement shall govern as to Options granted,  and Restricted Shares
issued, to the employee named therein.

     5. AMENDMENT TO SECTION 5.1. Section 5.1 of the 1994 Plan is hereby amended
by deleting  such section in its entirety and replacing it with the language set
forth below:

     5.1 IMPACT OF CHANGE OF CONTROL EVENT

     Except as otherwise  provided in the  Employment  Agreement with respect to
Options granted, and Restricted Shares issued, to the employee named therein and
notwithstanding any other provision of the Plan to the contrary, in the event of
a Change in Control  (i) all  outstanding  Options,  whether  or not  previously
exercisable and vested, shall terminate  immediately and become null and void on
the Change in Control Date, and (ii) any Restricted  Shares shall be redeemed by
the Company and  canceled as of the Change in Control  Date;  and in either case
the Company shall pay such Optionee the amount, if any, determined in accordance
with Section 5.2 in lieu of such Options or Restricted Shares.

     6. AMENDMENT TO SECTION 5.4. Section 5.4 of the 1994 Plan is hereby amended
by adding to the end of such Section the sentence set forth below:

     To the  extent  that  the  provisions  of this  Section  5.4 or any  Option
Agreement evidencing  outstanding Options or Restricted Shares conflict with any
provisions of the Employment Agreement, the Employment Agreement shall govern as
to Options granted, and Restricted Shares issued, to the employee named therein.

     7.  AMENDMENT  TO  GRANDFATHER  CLAUSE.  The  grandfather   provision  that
immediately  follows  Section 7.7 of the 1994 Plan is hereby amended by deleting
the  italicized  lead-in  thereto and  replacing  it with the language set forth
below:

     PRIOR TO  AMENDMENT  AND  RESTATEMENT,  SECTION 5, WHICH WILL  CONTINUE  TO
GOVERN  CURRENTLY  OUTSTANDING  AWARDS OF STOCK  OPTIONS AND  RESTRICTED  SHARES
(EXCEPT AS TO OPTIONS AND  RESTRICTED  SHARES HELD BY THE EMPLOYEE  NAMED IN THE
EMPLOYMENT AGREEMENT), FORMERLY PROVIDED AS FOLLOWS:

     8.  EFFECTIVE  DATE OF THE  FOURTH  AMENDMENT;  STOCKHOLDER  APPROVAL.  The
effective  date of this Fourth  Amendment  shall be March 24, 1999.  This Fourth
Amendment  shall  be  submitted  for the  approval  of the  stockholders  of the
Corporation  at  the  next  annual  meeting  thereof  on  May  26,  1999  or any
adjournment  thereof,  and,  if not  approved by the  stockholders,  this Fourth
Amendment shall be null and void.


<PAGE>
                                    EXHIBIT F

                               SECOND AMENDMENT TO
        EXPRESS SCRIPTS, INC. AMENDED AND RESTATED 1992 STOCK OPTION PLAN

                                    RECITALS

     A Express  Scripts,  Inc. (the  "Corporation")  has an Amended and Restated
1992 Stock  Option Plan (the "1992  Plan"),  which was  amended and  restated on
March 22, 1995 and approved by the stockholders on May 24, 1995.

     B. On March 24, 1999,  the Board of Directors of the  Corporation  approved
certain amendments to the 1992 Plan (the "First Amendment").

     C. On March 24, 1999, the Board approved certain  additional  amendments to
the 1992 Plan  pursuant to the  Employment  Agreement  dated as of April 1, 1999
between the Corporation and Barrett A. Toan.

                                    AMENDMENT

     1. DEFINITIONS. Capitalized terms set forth in this Second Amendment to the
1992 Plan (the "Second Amendment") shall be as defined in the 1992 Plan.

     2.  AMENDMENT  TO  SECTION  1,  DEFINITION  OF  "CHANGE  IN  CONTROL".  The
definition  of the term  "Change  in  Control"  in Section 1 of the 1992 Plan is
hereby amended by adding the following sentence to the end of such definition:

     Notwithstanding anything to the contrary herein, "Change in Control" or any
other  substantially  similar term that is defined in the  Employment  Agreement
shall have the meaning given such term in the  Employment  Agreement in order to
give effect to the provisions of such Agreement.

     3.  AMENDMENT  TO SECTION 1,  DEFINITION  OF  "EMPLOYMENT  AGREEMENT".  The
definition  of the term  "Employment  Agreement" is hereby added to Section 1 of
the 1992 Plan as set forth below:

     "Employment   Agreement"  shall  mean  that  certain  employment  agreement
effective as of April 1, 1999 between Barrett A. Toan and Express Scripts, Inc.,
as such agreement may be amended from time to time.

     4. AMENDMENT TO SECTION 4.2. Section 4.2 of the 1992 Plan is hereby amended
by adding a new Section 4.2(e) as set forth below:

     (e)  EMPLOYMENT  AGREEMENT.  To the extent that the  provisions  of Section
4.2(c), Section 4.2(d) or any Option Agreement evidencing outstanding Options or
Restricted Shares conflict with any provisions of the Employment Agreement,  the
Employment  Agreement shall govern as to Options granted,  and Restricted Shares
issued, to the employee named therein.

     5. AMENDMENT TO SECTION 5.1. Section 5.1 of the 1992 Plan is hereby amended
by deleting  such section in its entirety and replacing it with the language set
forth below:

     5.1 IMPACT OF CHANGE OF CONTROL EVENT

     Except as otherwise  provided in the  Employment  Agreement with respect to
Options granted, and Restricted Shares issued, to the employee named therein and
notwithstanding any other provision of the Plan to the contrary, in the event of
a Change in Control  (i) all  outstanding  Options,  whether  or not  previously
exercisable and vested, shall terminate  immediately and become null and void on
the Change in Control Date, and (ii) any Restricted  Shares shall be redeemed by
the Company and  canceled as of the Change in Control  Date;  and in either case
the Company shall pay such Optionee the amount, if any, determined in accordance
with Section 5.2 in lieu of such Options or Restricted Shares.

     6. AMENDMENT TO SECTION 5.4. Section 5.4 of the 1992 Plan is hereby amended
by adding to the end of such Section the sentence set forth below:

     To the  extent  that  the  provisions  of this  Section  5.4 or any  Option
Agreement evidencing  outstanding Options or Restricted Shares conflict with any
provisions of the Employment Agreement, the Employment Agreement shall govern as
to Options granted, and Restricted Shares issued, to the employee named therein.

     7.  AMENDMENT  TO  GRANDFATHER  CLAUSE.  The  grandfather   provision  that
immediately  follows  Section 7.7 of the 1992 Plan is hereby amended by deleting
the  italicized  lead-in  thereto and  replacing  it with the language set forth
below:

     PRIOR TO  AMENDMENT  AND  RESTATEMENT,  SECTION 5, WHICH WILL  CONTINUE  TO
GOVERN  CURRENTLY  OUTSTANDING  AWARDS OF STOCK  OPTIONS AND  RESTRICTED  SHARES
(EXCEPT AS TO OPTIONS AND  RESTRICTED  SHARES HELD BY THE EMPLOYEE  NAMED IN THE
EMPLOYMENT AGREEMENT), FORMERLY PROVIDED AS FOLLOWS:

     8.  EFFECTIVE  DATE OF THE  SECOND  AMENDMENT;  STOCKHOLDER  APPROVAL.  The
effective  date of this Second  Amendment  shall be March 24, 1999.  This Second
Amendment  shall  be  submitted  for the  approval  of the  stockholders  of the
Corporation  at  the  next  annual  meeting  thereof  on  May  26,  1999  or any
adjournment  thereof,  and,  if not  approved by the  stockholders,  this Second
Amendment shall be null and void.

<PAGE>

                                    EXHIBIT G

                               SECOND AMENDMENT TO
        EXPRESS SCRIPTS, INC. AMENDED AND RESTATED 1992 STOCK OPTION PLAN
                              FOR OUTSIDE DIRECTORS

                                    RECITALS

     A. Express  Scripts,  Inc. (the "Company") has an Amended and Restated 1992
Stock  Option Plan for Outside  Directors  (the  "Plan"),  which was amended and
restated on March 22, 1995 and approved by the stockholders on May 24, 1995, and
further amended on January 24, 1996 and approved by the  stockholders on May 22,
1996.

     B. On January 27, 1999,  based on the  recommendation  of the  Compensation
Committee  of the Board of Directors  of the Company  (the  "Board"),  the Board
approved  additional  awards  of  stock  options  to be  granted  to each of the
Company's outside directors.

                                    AMENDMENT

     1. DEFINITIONS. Capitalized terms set forth in this Second Amendment to the
Plan (the "Second Amendment") shall be as defined in the Plan.

     2.  AMENDMENT TO SECTION 2.1,  SHARES  SUBJECT TO PLAN.  Section 2.1 of the
Plan is amended by deleting the phrase  "192,000  Shares" in the first  sentence
thereof and inserting in lieu thereof the figure  "384,000  Shares",  to reflect
the stock split effected on October 30, 1998.

     3. AMENDMENT TO SECTION 3, ELIGIBILITY FOR OPTION GRANTS.  Section 3 of the
Plan is hereby amended by deleting such section in its entirety and replacing it
with the language set forth below:

     (a)  Each  individual  who  was a  Non-Employee  Director  on the  original
Effective  Date of this Plan  received an Option to purchase  28,000  Shares (as
adjusted  to reflect the stock  split  effected on October 30,  1998) as of such
date;

     (b) Each  individual  who was first  elected or  appointed to the office of
director as a  Non-Employee  Director  prior to the effective  date of the First
Amendment to this Plan and was still  serving in such  capacity on the effective
date of said First  Amendment  received an Option to purchase  20,000 Shares (as
adjusted  to reflect the stock split  effected on October 30,  1998),  as of the
effective  date of the  First  Amendment  to this  Plan  (the  "First  Amendment
Additional Options"),  such First Amendment Additional Options being in addition
to any Options previously granted to such Non-Employee Director;

     (c) Each  individual  who is first  elected or  appointed  to the office of
director as a Non-Employee  Director on or after the effective date of the First
Amendment  to the Plan shall  receive an Option to  purchase  48,000  Shares (as
adjusted  to reflect the stock split  effected on October 30,  1998),  as of the
date of the first  meeting of the Board  which such  individual  attends in such
capacity; and

     (d) Each  individual  who was first  elected or  appointed to the office of
director as a  Non-Employee  Director  prior to the effective date of the Second
Amendment and is still  serving in such  capacity on the effective  date of said
Second  Amendment  shall  receive an Option to purchase  2,500  Shares as of the
effective  date of said  Second  Amendment  (the  "Second  Amendment  Additional
Options"),  such Second  Amendment  Additional  Options to be in addition to any
Options previously granted to such Non-Employee Director.

     4. AMENDMENT TO SECTION 4.2(C),  VESTING.  Subsection 4.2(c) of the Plan is
hereby amended by deleting such subsection in its entirety and replacing it with
the language set forth below:

     (c)  VESTING.  Subject to  provisions  of Section 4.2 (d) and Section 5, an
Option shall become  exercisable in installments on a cumulative basis at a rate
of one-fifth (1/5) each year,  beginning on the first anniversary of the date of
grant, until the date such Option expires or is terminated;  PROVIDED,  HOWEVER,
that:

     (i)  the  First  Amendment  Additional  Options  shall  be  vested  in  two
installments of 10,000 Shares each on June 16, 1996, and on June 16, 1997; and

     (ii)  the  Second  Amendment   Additional   Options  shall  vest  in  three
installments  of 833,  833 and 834 on January  27,  2000,  January  27, 2001 and
January 27, 2002, respectively.

     5.  EFFECTIVE  DATE OF THE  SECOND  AMENDMENT;  STOCKHOLDER  APPROVAL.  The
effective date of this Second  Amendment  shall be January 27, 1999. This Second
Amendment  shall  be  submitted  for the  approval  of the  stockholders  of the
Corporation  at the next  annual  meeting  thereof on May 26,  1999,  and if not
approved by the  stockholders  this Second  Amendment  and any Second  Amendment
Additional  Options granted pursuant hereto prior to such approval shall be null
and void.

<PAGE>
                          [COMPANY LOGO INSERTED HERE]

Dear Shareholder:

     The Annual Meeting of Stockholders of Express Scripts, Inc. will be held at
the offices of the Company , 13900 Riverport Drive,  Maryland Heights,  Missouri
63043, at 9:30 a.m. on Wednesday, May 26, 1999.

     It is important that your shares be represented at this meeting. Whether or
not you plan to attend the meeting,  please review the enclosed proxy materials,
complete the attached  proxy form below,  and return it promptly in the envelope
provided.

                 Please Detach and Mail in the Envelope Provided
______________________________________________________________________________

- ------
X      Please mark your votes as in this example.
- ------

 (1) Election of
    Directors
                                    NOMINEE:
                      WITHHOLD
   FOR ALL THE      AUTHORITY TO    HOWARD ATKINS           
    NOMINEES        VOTE FOR ALL    JUDITH E. CAMPBELL      
 LISTED AT RIGHT   NOMINEES LISTED  RICHARD M. KERNAN, JR.  
   (except as         AT RIGHT      RICHARD A. NORLING
  marked to the                     FREDERICK J. SIEVERT      
 contrary below)                    STEPHEN N. STEINIG        
                                    SEYMOUR STERNBERG       
                                    BARRETT A. TOAN         
                                    HOWARD L. WALTMAN
                                    NORMAN ZACHARY

INSTRUCTION: To withhold authority to vote for any
individual nominee, print                                     
that nominee's name below.                                  
______________________________________________________
                                                             
                                             For      Against         Abstain
                                       
(2) Approval of the Company's          
Employee Stock Purchase Plan                                
                                        
(3) Approval of the Company's           
Executive Deferred Compensation Plan                
                                                    
(4) Approval of the Third Amendment                         
to the Company's Amended and Restated
1994 Stock Option Plan
                                                            
(5) Approval of the First Amendment to    
the Company's Amended and Restated 1992                                      
Stock Option Plan                                               
                                          
(6) Approval of the Fourth Amendment to   
the Company's Amended and Restated 1994   
Stock Option Plan                                                            
                                          
(7) Approval of the Second Amendment to   
the Company's Amended and Restated 1992   
Stock Option Plan                                                            
                                          
(8) Approval of the Second Amendment to  
the Company's Amended and Restated 1992  
Stock Option Plan for Outside Directors                                      
                                          
(9) Approval of an Amendment to the       
Company's Certificate of Incorporation    
to increase Authorized Shares of Class A  
Common Stock                                                                 
                                          
(10) Approval of an Amendment to the      
Company's Certificate of Incorporation    
to increase Authorized Shares of Class B  
Common Stock                                                                 
                                          
(11) Ratification of the appointment of   
Price Waterhouse LLP as the Company's     
independent accountants for 1999          

     This Proxy will be voted  FOR  items 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 and 11
if  no  instruction  to  the  contrary  is  indicated.  If  any  other  business
ispresented  at the  meeting,  the proxy  will be voted in  accordance  with the
recommendation of management.

      (YOU ARE REQUESTED TO COMPLETE, SIGN AND RETURN THIS PROXY PROMPTLY)

<PAGE>

                              EXPRESS SCRIPTS, INC.

             PROXY FOR ANNUAL MEETING OF STOCKHOLDERS - MAY 26, 1999
           THIS PROXY IS SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS

     The undersigned  hereby appoints Barrett A. Toan and Stuart L. Bascomb,  or
either one of them, as attorneys-in-fact, agents and proxies for the undersigned
with full power of  substitution,  to vote all shares of the Common Stock of the
undersigned in Express  Scripts,  Inc. (the Company) at the Annual Meeting of
Stockholders  of the  Company to be held on May 26,  1999 at 9:30  A.M.,  at the
offices of the Company, 13900 Riverport Drive, Maryland Heights, Missouri 63043,
or at any adjournment thereof,  upon the matters described in the Notice of such
Meeting and accompanying Proxy Statement, receipt of which is acknowledged,  and
upon such  other  business  as may  properly  come  before  the  Meeting  or any
adjournments thereof,  hereby revoking any proxies heretofore given. Please sign
exactly as  name(s)  appear on this proxy  card.  When  shares are held by joint
tenants,   both  should  sign.  When  signing  as  attorney-in-fact,   executor,
administrator,  personal representative,  trustee or guardian,  please give full
title as such. If a corporation, please sign in full corporate name by President
or other authorized officers. If a partnership,  please sign in partnership name
by authorized persons.


         Dated:_________________________    _______________________________
                                                     (Signature)

                                            _______________________________
                                               (Signature if held jointly)

<PAGE>
                                   APPENDIX I

                              EXPRESS SCRIPTS, INC.
                   AMENDED AND RESTATED 1994 STOCK OPTION PLAN


1.       PURPOSES; DEFINITIONS

       The purposes of the Plan are to further the growth, development and
financial success of the Company by providing incentives to those officers and
other key employees who have the capacity for contributing in substantial
measure toward the growth and profitability of the Company and to assist the
Company in attracting and retaining employees with the ability to make such
contributions.

     To accomplish  such purposes,  the Plan provides that the Company may grant
Incentive Stock Options and Nonqualified Stock Options.

     Whenever  the  following  terms are used in the Plan,  they  shall have the
meaning specified below unless the context clearly indicates to the contrary.

     "Board" shall mean the Board of Directors of the Company.

     "Cause" shall mean the willful failure by an Employee to perform his duties
with the Company,  a Parent or a Subsidiary  or the willful  engaging in conduct
which is injurious to the Company,  a Parent or any  Subsidiary,  monetarily  or
otherwise, as determined by the Committee in its sole discretion, provided that,
if the Employee has entered into an employment  agreement with the Company,  the
Committee,  in its sole  discretion,  may determine to substitute the definition
set forth in such agreement.

     "Change in Control" shall mean the following:

     (i) the first date on which both of the following  conditions  shall exist:
(A) New York Life Insurance  Company ("New York Life") shall have ceased to be a
Parent,  and (B) a "person" (as such term is used in Section  13(d) and 14(d) of
the Exchange Act), other than the Company or a Related Entity is the "beneficial
owner"  (as  defined  in  Rule  13d-3  under  the  Exchange  Act),  directly  or
indirectly,  of  securities of the Company  representing  fifty percent (50%) or
more of the combined voting power for the election of directors of the Company's
then outstanding securities;

     (ii) the shareholders of the Company approve a plan of complete liquidation
of the Company; or

     (iii) the  shareholders of the Company approve an agreement for the sale or
disposition by the Company of all or  substantially  all of the Company's assets
or any transaction having a similar effect.

     "Change in Control  Date"  shall  mean,  in the case of a Change in Control
defined in clause (i) or (ii) of the definition  thereof,  the date on which the
event occurs,  and in the case of a Change in Control defined in clause (iii) of
the definition thereof, the date on which the transaction closes.

     "Change in Control Price" shall mean, in a Change in Control transaction in
connection with which New York Life receives  consideration  for the transfer or
cancellation of its voting securities, the per share amount received by New York
Life; and in the case of any other Change in Control transaction, the greater of
the highest Fair Market Value or the highest price per share paid in a bona fide
transaction  related to such  Change in  Control at any time  during the 60 days
immediately preceding the Change in Control Date.

     "Code" shall mean the Internal  Revenue Code of 1986,  as amended from time
to time.

     "Committee" shall mean the Compensation  Committee of the Board,  appointed
as provided in Section 6.1.

     "Company" shall mean Express Scripts, Inc., a Delaware corporation, and any
successor corporation.

     "Comparable   Employment"  shall  mean  employment  with  the  Company  any
successor to the Company's  business  following a Change in Control  pursuant to
which:

     (i) the  responsibilities  and duties of the Employee are substantially the
same  as  before  the  Change  of  Control  (such  changes  as  are a  necessary
consequence  of the fact  that  the  securities  of the  Company  are no  longer
publicly  traded if the Company's  securities  cease to be publicly  traded as a
consequence  of the  Change  of  Control  shall  not be  considered  a change in
responsibilities  or duties),  and the other terms and  conditions of employment
following  the  Change in  Control  do not  impose on the  Employee  obligations
materially more burdensome than those to which the Employee was subject prior to
the Change in Control;

     (ii) the aggregate compensation  (including salary, bonus and other benefit
plans,  including option plans) of such Employee is  substantially  economically
equivalent to or greater than such Employee's aggregate compensation immediately
prior to the Change in Control Date. In making such determination there shall be
taken  into   account   all   contingent   or   unvested   compensation,   under
performance-based  compensation plans or otherwise,  with appropriate adjustment
for rights of forfeiture, vesting rules and other contingencies to payment; and

     (iii) the Employee is not required to relocate from the  metropolitan  area
of his or her residence  immediately  preceding the Change in Control (A) unless
the Company or such  successor pays the cost of such  relocation  (including any
loss  and  expenses  that the  employee  may  incur  upon the sale of his or her
residence),  (B) if the  relocation  is to an area with a higher  cost of living
than  the  area of the  Employee's  residence  prior  to such  relocation,  such
Employee's  compensation is equitably  adjusted to account for such  difference,
(C) unless the Employee is employed  under a written  contract for a term of not
less than three (3) years, and (D) is required to make only one such move during
the first three years of the written contract.

     "Effective Date" shall have the meaning set forth in Section 7.1.

     "Employee" shall mean any employee  (including any officer whether or not a
director) of the Company,  or of any corporation which is then a Subsidiary that
has been designated by the Board to participate in the Plan.

     "Early  Retirement"  shall  mean  retirement  by an  Employee  from  active
employment  with the Company,  a Parent or any  Subsidiary  (i) with the express
consent for purposes of the Plan of the Committee or such officer of the Company
as the Committee may designate  from time to time, or (ii) pursuant to the early
retirement  provisions of a pension plan maintained by the Company,  a Parent or
any Subsidiary.

     "Exchange Act" shall mean the Securities Exchange Act of 1934, as amended.

     "Fair Market  Value" per Share as of a particular  date shall mean,  unless
otherwise determined by the Committee:

     (i) the closing sales price per Share on a national securities exchange for
the last preceding date on which there was a sale of Shares on such exchange;

     (ii) if clause  (i) does not apply and the  Shares  are then  quoted on the
National  Association of Securities Dealers Automated Quotation system (known as
"NASDAQ"),  the closing  price per Share as reported on such system for the last
preceding date on which a sale was reported;

     (iii) if clause (i) or (ii) does not apply and the  Shares are then  traded
on an  over-the-counter  market, the average of the closing bid and asked prices
for the Shares in such  over-the-counter  market for the last  preceding date on
which such bid and asked prices were quoted; or

     (iv) if the Shares are not then listed on a national securities exchange or
traded  in an  over-the-counter  market,  such  value  as the  Committee  in its
discretion may determine.

     "Incentive Stock Option" shall mean an Option intended to be and designated
as an "incentive stock option" within the meaning of Section 422 of the Code.

     "Nonqualified  Stock  Option" shall mean an Option that is not an Incentive
Stock Option.

     "Normal  Retirement"  shall mean  retirement  by an  Employee  from  active
employment  with  the  Company,  a  Parent  or any  Subsidiary  (i) on or  after
attainment of age  sixty-five  (65),  or (ii) pursuant to the normal  retirement
provisions  of a  pension  plan  maintained  by the  Company,  a  Parent  or any
Subsidiary.

     "Option"  shall mean an option to  purchase  Shares  (including  Restricted
Shares, if the Committee so determines) granted pursuant to the Plan.

     "Option  Agreement"  shall  mean an Option  Agreement  to be  entered  into
between  the  Company  and an  Optionee,  which  shall  set  forth the terms and
conditions of the Options granted to such Optionee.

     "Optionee"  shall  mean an  Employee  to whom an  Option  has been  granted
pursuant to the Plan.

     "Parent" shall mean any corporation (other than the Company) in an unbroken
chain of corporations ending with the Company if each of the corporations (other
than the Company),  or if each group of commonly controlled  corporations,  then
(i) is the "beneficial owner" (as defined in Rule 13d-3 under the Exchange Act),
directly or indirectly,  of securities of one or more of the other  corporations
in such chain  representing  fifty percent (50%) or more of the combined  voting
power  for the  election  of  directors  for  such  corporation,  or (ii) if the
determination  of whether a  corporation  is a Parent is being made to determine
whether the requirements  governing  Incentive Stock Options have been met, owns
stock  possessing fifty percent (50%) or more of the total combined voting power
of all classes of stock of such corporation.

     "Payment  Date"  shall  mean a date not later than ten (10)  business  days
following the Change in Control Date.

     "Permanent  Disability"  shall mean that the Employee has suffered physical
or mental  incapacity  of such  nature as to  prevent  him from  engaging  in or
performing the principal  duties of his customary  employment or occupation on a
continuing or sustained basis, provided that, if an Employee has entered into an
employment  agreement with the Company,  the Committee,  in its sole discretion,
may determine to substitute  the  definition  set forth in such  agreement.  All
determinations  as to the date and extent of disability of any Employee shall be
made by the Committee  upon the basis of such evidence as it deems  necessary or
desirable.

     "Plan" shall mean this Express  Scripts,  Inc.  1994 Stock Option Plan,  as
hereinafter amended from time to time.

     "Related  Entity" shall mean a Parent, a Subsidiary or any employee benefit
plan (including a trust forming a part of such Plan)  maintained by the Company,
a Parent or a Subsidiary.

     "Restricted  Shares"  shall mean Shares  which are  received by an Optionee
upon the exercise of an Option and are subject to the restrictions  described in
Section 4.2(c).

     "Restriction  Period" shall mean the period during which Restricted  Shares
are subject to the restrictions set forth in Section 4.2(c).

     "Retirement" shall mean Early Retirement or Normal Retirement.

     "Securities Act" shall mean the Securities Act of 1933, as amended.

     "Share" shall mean a share of the Company's  Class A Common Stock,  .01 par
value.

     "Stockholder  Approval  Date"  shall have the  meaning set forth in Section
7.1.

     "Subsidiary"   shall  mean  any   corporation   in  an  unbroken  chain  of
corporations  beginning with the Company,  if each such corporation  (other than
the last  corporation  in the  unbroken  chain),  or if each  group of  commonly
controlled  corporations,  then owns  fifty  percent  (50%) or more of the total
combined voting power in one of the other corporations in such chain.

     "Ten-Percent  Stockholder"  shall  mean an  Employee,  who,  at the time an
Incentive  Stock  Option is to be  granted to the  Employee,  owns  (within  the
meaning of Section 422(b)(6) of the Code) stock possessing more than ten percent
(10%) of the total combined voting power of all classes of stock of the Company,
a Parent or a Subsidiary.

     "Termination of Employment" shall mean the time when the  employee-employer
relationship  between the Employee and the Company,  a Parent or a Subsidiary is
terminated for any reason whatsoever,  but excluding any termination where there
is a simultaneous reemployment by either the Company, a Parent or a Subsidiary.

2.       SHARES SUBJECT TO THE PLAN

2.1      SHARES SUBJECT TO PLAN

     The maximum number of Shares that may be issued or transferred  pursuant to
Options  under this Plan shall  initially be 210,000.  The Company shall reserve
such number of Shares for the purposes of the Plan,  out of its  authorized  but
unissued Shares or out of Shares held in the Company's  treasury,  or partly out
of each.  If any Shares that have been  subject to an Option cease to be subject
thereto,  or any Restricted  Shares received by an Optionee upon the exercise of
an Option are forfeited to the Company in accordance with the Option  Agreement,
such Shares may again be the subject of Options hereunder.

2.2      CHANGES IN COMPANY'S SHARES

     In the event that the  outstanding  Shares are  hereafter  changed  into or
exchanged  for a different  number or kind of shares or other  securities of the
Company, or of another corporation, by reason of reorganization, merger or other
subdivision,  consolidation,  recapitalization,  reclassification,  stock split,
issuance of warrants or rights, stock dividend, combination of shares or similar
event,  appropriate adjustments shall be made by the Committee in the number and
kind of Shares  subject to and which may be subject to Options  under this Plan,
and the purchase  price per Share,  to prevent  dilution or  enlargement  of the
benefits granted to, or available for, Optionees,  including  adjustments of the
limitations in Section 2.1 of the maximum number and kind of shares which may be
issued hereunder as Shares.

3.       ELIGIBILITY FOR OPTION GRANTS

     Any  Employee  who is employed on the senior  staff,  or as a member of the
sales force or who is  designated  by the  Committee as a key Employee  shall be
eligible to receive  Options  under this Plan.  In no event shall any Options be
granted to any member of the Board who is not an Employee.  The Committee  shall
from time to time, in its sole discretion:

     (a) select from among the eligible Employees  (including Optionees who have
previously  received Options) such of them as in its opinion should be permitted
to receive Options under this Plan;

     (b) determine the number of Shares to be subject to each Option  granted to
such selected Employees;  provided, that in no event shall Options be granted to
any Employee in excess of 150,000;

     (c)  determine  the terms and  conditions  applicable to each Option (which
need not be identical), consistent with the Plan; and

     (d) establish such  conditions as to the manner of exercise of such Options
as it may deem necessary,  including but not limited to, requiring  Optionees to
enter into agreements  regarding  transferability  and other  restrictions  with
respect to Shares issuable upon exercise of such Options.

4        TERMS OF OPTIONS AND SHARES

4.1      OPTION AGREEMENT

     Options shall be granted only pursuant to an Option Agreement,  which shall
be executed by the Optionee and an  authorized  officer of the Company and which
shall  contain  such terms and  conditions  as the  Committee  shall  determine,
consistent  with the  Plan,  including  appropriate  vesting  arrangements.  The
aggregate  Fair Market Value  (determined as of the date of grant) of the Shares
with respect to which  Incentive  Stock Options  granted under this Plan and all
other  option  plans  of the  Company,  the  Parent  and any  Subsidiary  become
exercisable by an Employee  during any calendar year shall not exceed  $100,000.
To the extent the  limitation  set forth in the preceding  sentence is exceeded,
the Options with respect to such excess amount shall be treated as  Nonqualified
Stock Options.

4.2      TERMS

     The  Options   granted   hereunder  shall  have  the  following  terms  and
conditions:

     (a) PRICE.  The purchase price for the Shares subject to an Option,  or the
manner in which such purchase price is to be determined,  shall be determined by
the Committee,  in its sole discretion,  and set forth in the Option  Agreement,
provided  that the  purchase  price per Share shall not be less than one hundred
percent  (100%) of the Fair Market Value of a Share as of the date the Option is
granted (110% in the case of an Incentive  Stock Option granted to a Ten-Percent
Stockholder).

     (b) TERM.  Options shall be for such term as the Committee shall determine,
and as shall be set  forth in each  Option  Agreement,  provided  that no Option
shall be  exercisable  after the  expiration  of ten  years  from the date it is
granted  (five  years in the case of an  Incentive  Stock  Option  granted  to a
Ten-Percent Stockholder).

     (c) VESTING.  Options shall be exercisable in such installments (which need
not be equal) and at such times as may be  designated  by the  Committee and set
forth in the Option Agreement.  To the extent not exercised,  installments shall
accumulate and may be exercised, in whole or in part, at any time after becoming
exercisable,  but not later than the date the Option expires.  The Committee may
accelerate the  exercisability  of any Option,  or the vesting of any Restricted
Shares, or portion thereof at any time.

     The  Committee  may in its  discretion  provide  that  all or a part of the
Shares received by an Optionee upon the exercise of a Nonqualified  Stock Option
shall be Restricted  Shares subject to any or all of the following  restrictions
or conditions:

     (i) Subject to the provisions of the Plan and the Option Agreement,  during
a period  set by the  Committee  commencing  with  the date of the  grant of the
Option (the  "Restriction  Period"),  the Optionee may not be permitted to sell,
transfer,  pledge  or  assign  the  Restricted  Shares.  The  Committee  in  its
discretion may provide for the lapse of such  restrictions in  installments  and
may accelerate or waive such restrictions in whole or in part, based on service,
performance and/or such other factors or criteria as the Committee may determine
in its discretion,

     (ii)  Except as  provided  in this  clause  (ii) and clause (i) above,  the
Optionee shall have, with respect to the Restricted Shares, all of the rights of
a  shareholder  of the Company,  including  the right to vote the Shares and the
right to receive any cash  dividends.  Stock  dividends  issued with  respect to
Restricted  Shares  shall be treated as  additional  Restricted  Shares that are
subject to the same  restrictions  and other terms and conditions  that apply to
the Shares with respect to which such dividends are issued.

     (iii) Subject to the applicable provisions of the Option Agreement and this
Section,  upon  Termination of Employment  during the  Restriction  Period,  all
Shares still subject to  restriction  will vest, or be forfeited,  in accordance
with the terms and conditions established by the Committee at grant.

     (iv) If and when the Restriction  Period expires without a prior forfeiture
of the Restricted Shares, certificates for an appropriate number of unrestricted
Shares shall be delivered to the Optionee promptly.

     (d) Termination of Employment. Except as provided in this Section 4.2(d) or
in the Option Agreement evidencing such an Option, in the event of a Termination
of  Employment  of an Optionee,  all  outstanding  Options held by such Optionee
shall terminate immediately, provided that, if such Termination of Employment is
due to the  Optionee's  death,  Permanent  Disability,  or  Retirement or by the
Company, a Parent or a Subsidiary without Cause, all outstanding Options held by
such Optionee shall  immediately  become fully  exercisable to the extent not so
exercisable,  shall remain  exercisable  for a period of three months  following
such Termination of Employment, and shall thereafter terminate.  Notwithstanding
the  foregoing,  (i) the Committee may provide,  either at the time an Option is
granted  or  thereafter,  that the  Option  may be  exercised  after the  period
provided  for in this  Section  4.2(d),  but in no event  beyond the term of the
Option,  and (ii) no provision in this Section  4.2(d) shall extend the exercise
period of an Option beyond its original term.

4.3      NON-TRANSFERABILITY

     No Option granted under the Plan shall be  transferable  by the Optionee to
whom granted otherwise than by will or the laws of descent and distribution, and
an Option may be  exercised  during the  lifetime of such  Optionee  only by the
Optionee or his guardian or legal representative. The terms of such Option shall
be  binding  upon  the  beneficiaries,   executors,  administrators,  heirs  and
successors of the Optionee.

4.4      METHOD OF EXERCISE

     The exercise of an Option shall be made only by a written notice  delivered
in person or by mail to the Secretary of the Company at the Company's  principal
executive  office,   specifying  the  number  of  Shares  to  be  purchased  and
accompanied by full payment therefor and otherwise in accordance with the Option
Agreement  pursuant to which the Option was granted.  The purchase price for any
Shares  purchased  pursuant to the  exercise of an Option  shall be paid in full
upon such exercise in cash, by check or, at the  discretion of the Committee and
upon such terms and conditions as the Committee  shall approve,  by transferring
previously  owned Shares to the Company,  having  Shares  withheld or exercising
pursuant to a "cashless exercise"  procedure,  or any combination  thereof.  Any
Shares  transferred  to the  Company as payment of the  purchase  price under an
Option shall be valued at their Fair Market Value on the day  preceding the date
of exercise of such Option.  If requested by the  Committee,  the Optionee shall
deliver  the Option  Agreement  evidencing  the Option to the  Secretary  of the
Company who shall  endorse  thereon a notation of such  exercise and return such
Option Agreement to the Optionee.  Not less than one hundred (100) Shares may be
purchased at any time upon the exercise of an Option unless the number of Shares
so purchased  constitutes the total number of Shares then purchasable  under the
Option or the Committee determines otherwise in its sole discretion.

4.5      RIGHTS AS STOCKHOLDER

     No Optionee shall be deemed for any purpose to be or to have the rights and
privileges of the owner of any Shares subject to any Option unless and until (a)
the Option shall have been exercised pursuant to the terms thereof,  and (b) the
Company shall have issued the Shares to the Optionee.

5.       CHANGE IN CONTROL PROVISIONS

5.1      IMPACT OF CHANGE IN CONTROL EVENT

     Notwithstanding  anything herein to the contrary,  in the event of a Change
in Control (i) all outstanding  Options,  whether or not previously  exercisable
and vested,  shall terminate  immediately and become null and void on the Change
in Control Date, and (ii) any Restricted Shares shall be redeemed by the Company
and  canceled as of the Change in Control  Date;  and in either case the Company
shall pay such  Optionee  the amount,  if any,  determined  in  accordance  with
Section 5.2 in lieu of such options or Restricted Shares.

5.2      PAYMENT FOR OPTIONS AND RESTRICTED SHARES

     (a) NO  OFFER OF  COMPARABLE  EMPLOYMENT.  If an  Optionee  is not  offered
Comparable  Employment  with  the  Company  or any  successor  to the  Company's
business on or prior to the Change in Control  Date,  the Company  shall pay the
Optionee for each of his Options that was terminated  pursuant to Section 5.1 an
amount  equal to the  excess,  if any of the  Change in  Control  Price over the
purchase  price for the shares subject to such Option,  and for each  Restricted
Share that was redeemed and  canceled,  an amount equal to the Change in Control
Price.  Such aggregate  amount shall be paid to the Optionee by the Company in a
cash lump sum on the Payment Date.

     (b) OFFER OF COMPARABLE  EMPLOYMENT ACCEPTED. If an Optionee is offered and
accepts Comparable Employment with the Company or any successor to the Company's
business,  the Company  shall pay the  Optionee for each of his Options that was
canceled  pursuant to Section 5.1 an amount equal to the excess,  if any, of the
Change in Control Price over the purchase  price for the shares  subject to such
Option, and for each Restricted Share that was redeemed and canceled,  an amount
equal to the Change in Control Price. Such aggregate amount shall be paid to the
Optionee as follows:

     (i) any amount  attributable to Options that were vested on or prior to the
Change in Control Date shall be paid to the Optionee on the Payment Date.

     (ii) any amount attributable to Options that would have become vested after
the Change in Control Date but prior to the second  anniversary of the Change in
Control  Date,  or to  Restricted  Shares  the  transferability  and  forfeiture
restrictions on which would have lapsed during such period, shall be paid to the
Optionee  on the date  that the  Options  otherwise  would  have  vested  or the
restrictions on such Restricted  Shares otherwise would have lapsed, as the case
may be; and

     (iii) any other amounts due to the Optionee and not  disbursed  pursuant to
the preceding clauses (i) and (ii) shall be paid in two cash installments on the
first  and  second  anniversary  of  the  Change  in  Control  Date,  the  first
installment  being  equal to one-half of the amount that would have been paid in
the absence of the  preceding  clause (ii) above minus the amount of any payment
made prior to such first installment  pursuant to the preceding clause (ii), and
the second installment being equal to the remaining balance due to the Optionee.

     Notwithstanding the foregoing,  in the event of a Termination of Employment
of the Optionee at any time before such second anniversary, other than by reason
of (A) the Optionee's death, Permanent Disability or Retirement, (B) termination
by the Company or any successor to the Company's  business without Cause, or (C)
termination  by the Employee  after his  employment  ceases for any reason to be
Comparable Employment,  the Optionee shall forfeit any right to, an shall not be
paid,  any unpaid  installments.  In the case of a Termination of Employment for
any reason  specified in clause (A), (B) or (C) of the preceding  sentence,  all
unpaid  installments  shall be paid to the  Optionee  in a cash lump sum  within
thirty (30) days of such Termination of Employment.

     (c) OFFER OF  COMPARABLE  EMPLOYMENT  REJECTED.  If an  Optionee is offered
Comparable  Employment  with  the  Company  or any  successor  to the  Company's
business  and he rejects  such offer,  the Company  will pay to the Optionee for
each of his Options  that was fully  vested  immediately  prior to the Change in
Control  Date,  an amount equal to the excess,  if any, of the Change in Control
Price over the purchase  price for the shares  subject to such  Option,  and for
each  Restricted  Share that was  redeemed  and  canceled an amount equal to the
lesser of (i) the  Change  in  Control  Price,  or (ii) the  amount  paid by the
Optionee to acquire such Restricted Shares from the Company.  Except as provided
in the  preceding  sentence,  the Company  shall not be required to pay, and the
Optionee  shall not be entitled to receive,  any amount  under this Section 5 or
otherwise in connection with the  cancellation of any other Options  pursuant to
Section 5.1. Any amount  payable to the Optionee  hereunder  shall be payable on
the Payment Date.

5.3      ESCROW OF DEFERRED PAYMENTS

     (a) Any amount  that may become  payable to  Optionees  pursuant to Section
5.2(b) above shall be  deposited on the Payment Date in escrow with a U.S.  bank
with unrestricted capital and surplus of not less than $100,000,000.  Such funds
shall be invested in securities  issued or fully guaranteed as to both principal
and interest by the U.S. Government.  Interest earned shall be allocated ratably
among the  Optionees  receiving  payment of such funds and,  if any  amounts are
forfeited by an  Optionee,  to the  Company,  and shall be  disbursed  when such
payments are made.

     (b) DISBURSEMENTS

     (i) Subject to the following  clauses (ii) and (iii),  the escrow agreement
shall  provide for  disbursements  to  Optionees in  accordance  with a schedule
attached thereto and prepared in accordance with Section 5.2(b)(ii) and (iii).

     (ii) If an Optionee  forfeits his rights to any  payments  from the escrow,
the Company shall give written  notice thereof  contemporaneously  to the escrow
agent and the  Optionee  by  certified  or  registered  mail (in the case of the
Optionee,  to the last  known  address  of the  Optionee  on the  records of the
Company),  stating the reason for such  forfeiture and the amount  thereof.  The
escrow  agent  shall  disburse  the amount  stated in such notice to the Company
thirty  (30) days after  receipt  thereof  unless  prior to such time the escrow
agent receives  written  notice of objection  from the Optionee.  If a notice of
objection is  received,  the escrow  agent shall  disburse  such funds only upon
order of a court of competent  jurisdiction or upon written  instructions signed
by both the Company and the Optionee.

     (iii) If an Optionee or his  successor  in interest  becomes  entitled to a
payment from the escrow prior to the time stated in the  schedule,  the Optionee
or such successor  shall give written notice  thereof  contemporaneously  to the
escrow agent and the Company by certified or registered mail, stating the reason
for such  accelerated  payment and the amount  thereof.  The escrow  agent shall
disburse  the amount  stated in such notice to the  Optionee  or such  successor
thirty  (30) days after  receipt  thereof  unless  prior to such time the escrow
agent  receives  written  notice of objection  from the Company.  If a notice of
objection is  received,  the escrow  agent shall  disburse  such funds only upon
order of a court of competent  jurisdiction or upon written  instructions signed
by both the Company and the Optionee.

5.4      PARACHUTE PAYMENTS

     In the  event  that  the  aggregate  present  value of the  payments  to an
Optionee under this Plan, and any other plan, program, or arrangement maintained
by the Company (a Subsidiary or, if applicable, a Parent) constitutes an "excess
parachute  payment"  (within the meaning of Section  280G(b)(1) of the Code) and
the excise tax on such payment  would cause the net  parachute  payments  (after
taking into account  federal,  state and local income and excise taxes) to which
the  Optionee  otherwise  would be  entitled,  to be less than what the Optionee
would have netted  (after  taking into account  federal,  state and local income
taxes) had the present value of his total parachute  payments equaled $1.00 less
than three times his "base amount" (within the meaning of Section  280G(b)(3)(A)
of the Code), the Optionee's total "parachute  payments"  (within the meaning of
Section  280G(b)(2)(A)  of the Code) shall be reduced  (by the minimum  possible
amount) so that their aggregate present value equals $1.00 less than three times
such base amount. For purposes of this calculation, it shall be assumed that the
Optionee's tax rate will be the maximum marginal federal, state and local income
tax rate on earned  income,  with such maximum  federal rate to be computed with
regard  to  Section  1(g) of the Code,  if  applicable.  In the  event  that the
Optionee and the Company or any successor to the  Company's  Business are unable
to agree as to the amount of the reduction described above, if any, the Optionee
shall select a law firm or accounting firm from among those regularly  consulted
(during the twelve-month  period immediately prior to the Change in Control that
resulted in the  characterization  of the payments as parachute payments) by the
Company  regarding  federal income tax or employee  benefit matters and such law
firm or accounting firm shall determine, at the Company's expense, the amount of
such  reduction  and such  determination  shall be final  and  binding  upon the
Optionee and the Company or such successor.

6.       ADMINISTRATION

6.1      COMPENSATION COMMITTEE

     The Plan shall be  administered  by the Committee which shall consist of at
least three directors of the Company,  appointed by the Board and holding office
at the  pleasure of the Board.  All  Committee  members  shall be members of the
Board.  All members of the Committee  must be  "disinterested  persons," as such
term  is  described  in  Rule  16b-3  adopted  by the  Securities  and  Exchange
Commission  under the Exchange  Act, if and as such Rule is in effect and to the
extent  required by Section 162(m) of the Code and the  Regulations  promulgated
thereon, an "outside director" within the meaning thereof.

6.2      DUTIES AND POWERS OF COMMITTEE

     It shall be the duty of the Committee to conduct the general administration
of the Plan in accordance  with its terms and  provisions.  The Committee  shall
have the power to interpret the Plan and the Option Agreements and to adopt such
rules for the administration,  interpretation and application of the Plan as are
consistent therewith and to interpret, amend or revoke any such rules.

6.3      MAJORITY RULE

     The  Committee  shall act by a  majority  of its  members  in  office.  The
Committee  may act  either  by vote at a  telephonic  or other  meeting  or by a
memorandum or other written instrument signed by a majority of the Committee .

6.4      COMPENSATION; PROFESSIONAL ASSISTANCE; GOOD FAITH ACTIONS

     Members of the Committee may receive such  compensation  for their services
as members as may be  determined  by the Board.  All  expenses  and  liabilities
incurred by members of the Committee in connection  with the  administration  of
the Plan shall be borne by the  Company.  The  Committee  may employ  attorneys,
consultants,  accountants,  appraisers,  or other persons.  The  Committee,  the
Company  and its  officers  and  directors  shall be  entitled  to rely upon the
advice,  opinions or valuations  of any such persons.  All actions taken and all
interpretations  and determinations made by the Committee in good faith shall be
final and binding  upon all  Optionees,  the  Company  and all other  interested
persons.  No member of the Committee shall be personally  liable for any action,
determination or  interpretation  made in good faith with respect to the Plan or
the Options,  and all members of the Committee  shall be fully  protected by the
Company in respect to any such action, determination or interpretation.

7.       OTHER PROVISIONS

7.1      EFFECTIVE DATE

     (a) EFFECTIVE  DATE. The Plan shall become  effective as of the date of the
adoption  of the Plan by the  Board,  subject to the  approval  of the Plan by a
majority  of the  Company's  stockholders  (the  "Effective  Date"),  and  shall
continue  in effect  until  June 6, 2004 or until the  Change in  Control  Date,
whichever is sooner; provided, that termination of the Plan shall not affect the
rights of any Optionee  with  respect to Options  granted or  Restricted  Shares
acquired  contemporaneously  with or prior to such termination.  Notwithstanding
anything  herein or in any Option  Agreement to the  contrary,  Options  granted
hereunder  shall  not  vest  and  may  not be  exercised  prior  to the  date of
stockholder  approval (the "Stockholder  Approval Date"), and, in the event that
the  Stockholder  Approval Date has not occurred on or prior to June 6, 1995 (or
such later date as determined by the Board in its sole discretion),  all Options
granted prior to such date shall be null and void and of no effect,  retroactive
to the  date of  grant,  and the Plan  shall be null and void and of no  effect,
retroactive to the date of Board approval.

     (b) EFFECT OF CERTAIN  AMENDMENTS.  The amendments approved by the Board of
Directors on March 22, 1995, other than the amendments to sections 2.1, 3(b) and
6.1 hereof,  shall be effective only with respect to Options  granted after such
date,  provided,  however,  that the  Committee may enter into  agreements  with
Optionees  whose options were granted prior to such date to make such amendments
applicable, in whole or in part, to such Options.

7.2      AMENDMENT, SUSPENSION OR TERMINATION OF THE PLAN

     The  Plan  may be  wholly  or  partially  amended  or  otherwise  modified,
suspended or terminated at any time or from time to time by the Board; provided,
however,  that,  except as  provided  in  Section  2.2,  no  amendment  shall be
effective  unless  approved by the  affirmative  vote of a majority of the votes
eligible  to be cast at a meeting of  stockholders  of the  Company  held within
twelve  (12)  months  of the date of  adoption  of such  amendment,  where  such
amendment will:

     (a) increase the number of Shares as to which  Options may be granted under
the Plan;

     (b) change the class of persons eligible to participate in the Plan;

     (c) change the  minimum  purchase  price of Shares  pursuant  to Options as
provided herein;

     (d) extend the maximum period for granting or exercising  Options  provided
herein; or

     (e) otherwise  materially increase the benefits accruing to Optionees under
the Plan.

     From and after the Effective  Date,  neither the amendment,  suspension nor
termination  of the Plan shall,  without the consent of the  Optionee,  alter or
impair  any  rights or  obligations  under any Option  theretofore  granted.  No
Options may be granted during any period of suspension nor after  termination or
expiration of the Plan.

7.3      EFFECT OF PLAN UPON OTHER COMPENSATION AND INCENTIVE PLANS

     The  adoption  of the Plan  shall  not  affect  any other  compensation  or
incentive plans in effect for the Company or any Subsidiary. Nothing in the Plan
shall be  construed  to limit  the right of the  Company  or any  Subsidiary  to
establish  any other forms of incentives  or  compensation  for Employees of the
Company or any Subsidiary.

7.4      REGULATIONS AND OTHER APPROVALS; GOVERNING LAW

     (a) The Plan and the  rights of all  persons  claiming  hereunder  shall be
construed and  determined  in accordance  with the laws of the State of Delaware
without giving effect to the choice of law principles thereof.

     (b) The obligation of the Company to sell or deliver Shares with respect to
Options  granted under the Plan shall be subject to all applicable  laws,  rules
and regulations, including all applicable federal and state securities laws, and
the obtaining of all such  approvals by  governmental  agencies as may be deemed
necessary or appropriate by the Committee.

     (c) The Board may make such changes as may be necessary or  appropriate  to
comply with the rules and  regulations of any government  authority or to obtain
the tax benefits  under the  applicable  provisions of the Code and  regulations
promulgated thereunder for Employees granted Incentive Stock Options.

     (d) Each  Option is subject  to the  requirement  that,  if at any time the
Committee determines, in its sole discretion, that the listing,  registration or
qualification  of  Shares  issuable  pursuant  to the  Plan is  required  by any
securities  exchange  or under any  state or  federal  law,  or the  consent  or
approval of any  governmental  regulatory  body is  necessary  or desirable as a
condition of, or in connection  with,  the grant of an Option or the issuance of
Shares,  no Options shall be granted or payment made or Shares issued,  in whole
or in part, unless listing, registration, qualification, consent or approval has
been effected or obtained free of any conditions as acceptable to the Committee.

     (e) In the event that the  disposition of Shares  acquired  pursuant to the
Plan  is  not  covered  by a  then  current  registration  statement  under  the
Securities Act, and is not otherwise exempt from such registration,  such Shares
shall be restricted  against  transfer to the extent  required by the Securities
Act or  regulations  thereunder,  and the Committee  may require any  individual
receiving  Shares  pursuant to the Plan, as a condition  precedent to receipt of
such Shares,  to represent to the Company in writing that the Shares acquired by
such  individual  are  acquired  for  investment  only  and  not  with a view to
distribution.  The  certificate  for such  shall  include  any  legend  that the
Committee deems appropriate to reflect any restrictions on transfer.

7.5      WITHHOLDING OF TAXES

     No later than the date as to which an amount first  becomes  includable  in
the gross income of an Optionee for Federal  income tax purposes with respect to
any Option  granted under the Plan,  the Optionee  shall pay to the Company,  or
make  arrangements  satisfactory to the Committee  regarding the payment of, any
Federal,  state, or local taxes of any kind required by law or the Company to be
withheld with respect to such amount.  The  obligations of the Company under the
Plan shall be conditional  on such payment or  arrangements  and the Company,  a
Parent and any Subsidiary  shall, to the extent  permitted by law have the right
to deduct  any such  taxes from any  payment  of any kind  otherwise  due to the
Optionee.  In its  discretion,  the  Committee  may permit  Optionees to satisfy
withholding  obligations by delivering previously owned Shares or by electing to
have Shares withheld.

7.6      NO RIGHT TO CONTINUED EMPLOYMENT

     Nothing  in the  Plan or in any  Option  Agreement  shall  confer  upon any
Optionee  any right to  continue in the employ of the  Company,  a Parent or any
Subsidiary  or shall  interfere  with or  restrict  in any way the  right of the
Company, a Parent and any Subsidiary,  which are hereby expressly  reserved,  to
remove,  terminate  or  discharge  any  Optionee  at any  time  for  any  reason
whatsoever, with or without Cause.

7.7      TITLES; CONSTRUCTION

     Titles are provided herein for  convenience  only and are not to serve as a
basis for  interpretation  or  construction  of the Plan. The masculine  pronoun
shall include the feminine and neuter and the singular shall include the plural,
when the context so indicates.

     PRIOR TO  AMENDMENT  AND  RESTATEMENT,  SECTION 5, WHICH WILL  CONTINUE  TO
GOVERN  CURRENTLY  OUTSTANDING  AWARDS OF STOCK OPTIONS AND  RESTRICTED  SHARES,
FORMERLY PROVIDED AS FOLLOWS:

5.       CHANGE IN CONTROL PROVISIONS

     In the  event of a Change  in  Control,  (a) all  outstanding  Options  not
previously exercisable and vested shall immediately become fully exercisable and
vested, and (b) the  transferability and forfeiture  restrictions  applicable to
any  Restricted  Shares to the extent not  already  lapsed,  shall  lapse and no
longer be applicable,  and such Shares shall be deemed fully vested and owned by
the Optionee.

     "Change in  Control"  shall  mean the  occurrence  of any of the  following
events at a time when New York Life  Insurance  Company,  A New York mutual life
insurance company, or any successor thereto is not a Parent:

     (i) any  "person,"  as such term is used in Section  13(d) and 14(d) of the
Exchange Act, (other than the Company or a Related Entity,  without the approval
of the Board, becomes the "beneficial owner" (as defined in Rule 13d-3 under the
Exchange Act), directly or indirectly, of securities of the Company representing
fifty  percent  (50%) or more of the  combined  voting power for the election of
directors of the Company's then outstanding securities;

     (ii) during any period of two  consecutive  years beginning on or after the
effective  date of the Plan,  individuals  who at the  beginning  of such period
constitute the Board, and any new director (other than a director  designated by
a person  who has  entered  into an  agreement  with  the  Company  to  effect a
transaction  described in clause (i), (iii) or (iv)) whose election by the Board
or nomination for election by the Company's  shareholders was approved by a vote
of at least  two-thirds  (2/3) of the directors  then still in office who either
were  directors at the  beginning of the period or whose  election or nomination
for election was previously so approved  (unless the approval of the election or
nomination  for election of such new directors was in connection  with an actual
or threatened election or proxy contest),  cease for any reason to constitute at
least a majority thereof;

     (iii) the  shareholders of the Company approve a merger or consolidation of
the Company with any other corporation, other than (x) a merger or consolidation
which  would  result  in  the  voting  securities  of  the  Company  outstanding
immediately   prior  thereto   continuing  to  represent  (either  by  remaining
outstanding  or by being  converted  into  voting  securities  of the  surviving
entity)  more than eighty  percent  (80%) of the  combined  voting  power of the
voting   securities  of  the  Company  or  such  surviving  entity   outstanding
immediately  after such merger or consolidation or (y) a merger or consolidation
effected to implement a recapitalization of the Company (or similar transaction)
in which no "person" (as defined  above in clause (i))  acquires more than fifty
percent (50%) of the combined  voting power for the election of directors of the
Company's then outstanding securities; or

     (iv) the shareholders of the Company approve a plan of complete liquidation
of the Company or an agreement for the sale or disposition by the Company of all
or substantially all of the Company's assets or any transaction having a similar
effect.

<PAGE>


                               FIRST AMENDMENT TO
                              EXPRESS SCRIPTS, INC.
                   AMENDED AND RESTATED 1994 STOCK OPTION PLAN

                                    RECITALS

     A. Express  Scripts,  Inc. (the "Company") has an Amended and Restated 1994
Stock Option Plan (the "Plan")  which was amended and restated on March 22, 1995
and approved by the stockholders on May 24, 1995.

     B. On January 29, 1997, the Board of Directors of the Company (the "Board")
approved an increase in the number of shares which may be issued pursuant to the
Plan.

                                    AMENDMENT

     1. DEFINITIONS.  Capitalized terms set forth in this First Amendment to the
Plan (the "First Amendment") shall be as defined in the Plan.

     2.  AMENDMENT TO SECTION 2.1,  SHARES  SUBJECT TO PLAN.  Section 2.1 of the
Plan is amended by deleting the number  "210,000" in the first sentence  thereof
and inserting in lieu thereof the number "460,000."

     3.  EFFECTIVE  DATE  OF THE  FIRST  AMENDMENT;  STOCKHOLDER  APPROVAL.  The
effective  date of this First  Amendment  shall be January 29, 1997.  This First
Amendment  shall  be  submitted  for the  approval  of the  stockholders  of the
Corporation  at the next  annual  meeting  thereof on May 28,  1997,  and if not
approved by the stockholders this First Amendment shall be null and void.

<PAGE>

                               SECOND AMENDMENT TO
                              EXPRESS SCRIPTS, INC.
                   AMENDED AND RESTATED 1994 STOCK OPTION PLAN

                                    RECITALS

     A. Express  Scripts,  Inc. (the "Company") has an Amended and Restated 1994
Stock  Option Plan which was amended and restated on March 22, 1995 and approved
by the stockholders on May 24, 1995, and which was  subsequently  amended by the
Board of Directors of the Company (the "Board") and approved by the stockholders
on January 29, 1997 and May 29, 1997, respectively (as amended, the "Plan").

     B. On January  27,  1998,  the Board  approved an increase in the number of
shares which may be issued pursuant to the Plan.

                                    AMENDMENT

     1. DEFINITIONS. Capitalized terms set forth in this Second Amendment to the
Plan (the "Second Amendment") shall be as defined in the Plan.

     2.  AMENDMENT TO SECTION 2.1,  SHARES  SUBJECT TO PLAN.  Section 2.1 of the
Plan is amended by deleting the number  "460,000" in the first sentence  thereof
and inserting in lieu thereof the number "960,000."

     3.  EFFECTIVE  DATE OF THE  SECOND  AMENDMENT;  STOCKHOLDER  APPROVAL.  The
effective date of this Second  Amendment  shall be January 27, 1998. This Second
Amendment  shall  be  submitted  for the  approval  of the  stockholders  of the
Corporation  at the next  annual  meeting  thereof on May 27,  1998,  and if not
approved by the stockholders this Second Amendment shall be null and void.


<PAGE>

                               THIRD AMENDMENT TO
        EXPRESS SCRIPTS, INC. AMENDED AND RESTATED 1994 STOCK OPTION PLAN

                                    RECITALS

     A. Express Scripts,  Inc. (the  "Corporation")  has an Amended and Restated
1994 Stock  Option  Plan,  which was amended and  restated on March 22, 1995 and
approved by the stockholders on May 24, 1995, and which was subsequently amended
by the Board of Directors of the  Corporation  (the "Board") on January 29, 1997
and  January 27,  1998,  and such  subsequent  amendments  were  approved by the
stockholders on May 28, 1997 and May 27, 1998, respectively (the "1994 Plan").

     B. On March 24,  1999,  the Board  approved  an  increase  in the number of
shares  that  the  Company  may  issue  pursuant  to the 1994  Plan and  certain
additional amendments to the 1994 Plan.

                                    AMENDMENT

     1. DEFINITIONS.  Capitalized terms set forth in this Third Amendment to the
1994 Plan (the "Third Amendment") shall be as defined in the 1994 Plan.

     2. AMENDMENT TO SECTION 1, DEFINITION OF "EARLY RETIREMENT". The definition
of the term  "Early  Retirement"  in  Section 1 of the 1994 Plan is  amended  by
inserting at the end of clause (ii) the additional language set forth below:

     , provided,  however, that a non-qualified deferred compensation plan shall
not be deemed to be a pension plan for purposes of this definition.

     3.  AMENDMENT  TO  SECTION  1,  DEFINITION  OF  "NORMAL  RETIREMENT".   The
definition  of the term  "Normal  Retirement"  in  Section 1 of the 1994 Plan is
amended by inserting at the end of clause (ii) the additional language set forth
below:

     , provided,  however, that a non-qualified deferred compensation plan shall
not be deemed to be a pension plan for purposes of this definition.

     4. AMENDMENT TO SECTION 1, DEFINITION OF "PLAN". The definition of the term
"Plan" in Section 1 of the 1994 Plan is amended by deleting  such  definition in
its entirety and replacing it with the language set forth below:

     "Plan"  shall mean this Express  Scripts,  Inc.  Amended and Restated  1994
Stock Option Plan, as amended from time to time.

     5.  AMENDMENT TO SECTION 2.1,  SHARES  SUBJECT TO PLAN.  Section 2.1 of the
1994 Plan is amended to read as follows in its entirety:

     The maximum number of Shares that may be issued or transferred  pursuant to
Options under this Plan shall be  2,920,000,  which has been adjusted to reflect
the stock  split  effected  on October 30,  1998.  Such  number of Shares  shall
increase annually, effective as of each January 1, commencing on January 1, 2000
and  ending on January 1,  2004,  by an amount  equal to one (1)  percent of the
Company's total  outstanding  shares of Class A and Class B Common Stock on such
date.  The Company  shall  reserve such number of Shares for the purposes of the
Plan out of its  authorized  but  unissued  Shares or out of Shares  held in the
Company's treasury,  or partly out of each. If any Shares that have been subject
to an Option cease to be subject thereto,  or any Restricted  Shares received by
an  Optionee  upon the  exercise  of an Option are  forfeited  to the Company in
accordance  with the Option  Agreement,  such Shares may again be the subject of
Options hereunder.

     6. AMENDMENT TO SECTION 2.2,  CHANGES IN COMPANY'S  SHARES.  Section 2.2 of
the 1994 Plan is hereby amended by inserting at the end of the single  paragraph
of such section the additional language set forth below:

     and  adjustments of the limitation in Section 3(b) of the maximum number of
Shares subject to Options that may be granted to any Employee.

     7. AMENDMENT TO SECTION 3, ELIGIBILITY FOR OPTION GRANTS.  Section 3 of the
1994 Plan is hereby  amended  by  deleting  paragraph  (b) in its  entirety  and
replacing  it with the  language  set forth  below to  reflect  the stock  split
effected on October 30, 1998:

     (b) determine the number of Shares to be subject to each Option  granted to
such selected Employees;  provided, that in no event shall Options be granted to
any Employee in excess of 300,000;

     8.  AMENDMENT TO SECTION 4.4,  METHOD OF EXERCISE.  Section 4.4 of the 1994
Plan is hereby amended by deleting the second sentence  thereof and replacing it
with the language set forth below:

     The purchase price for any Shares purchased  pursuant to the exercise of an
Option  shall be paid in full upon such  exercise  in cash,  by check or, at the
discretion of the Committee and upon such terms and  conditions as the Committee
shall approve, by transferring previously owned Shares to the Company (including
by way of attestation of the Optionee's ownership of such Shares), having Shares
withheld  or  exercising  pursuant to a "cashless  exercise"  procedure,  or any
combination thereof.

     9.  AMENDMENT TO SECTION 6.1,  COMPENSATION  COMMITTEE.  Section 6.1 of the
1994 Plan is hereby  amended  by  deleting  such  section  in its  entirety  and
replacing it with the language set forth below:

     6.1 COMPENSATION COMMITTEE

     The Plan shall be  administered  by the Committee which shall consist of at
least three directors of the Company,  appointed by the Board and holding office
at the  pleasure of the Board.  All  Committee  members  shall be members of the
Board.

     10.  EFFECTIVE  DATE OF THE  THIRD  AMENDMENT;  STOCKHOLDER  APPROVAL.  The
effective  date of this  Third  Amendment  shall be March 24,  1999.  This Third
Amendment  shall  be  submitted  for the  approval  of the  stockholders  of the
Corporation  at the next annual  meeting  thereof on May 26,  1999,  and, if not
approved by the stockholders, this Third Amendment shall be null and void.


<PAGE>



    FOURTH AMENDMENT TO EXPRESS SCRIPTS, INC. AMENDED AND RESTATED 1994 STOCK
                                  OPTION PLAN

                                    RECITALS

     A. Express Scripts,  Inc. (the  "Corporation")  has an Amended and Restated
1994 Stock  Option  Plan,  which was amended and  restated on March 22, 1995 and
approved by the stockholders on May 24, 1995, and which was subsequently amended
by the Board of Directors of the  Corporation  (the "Board") on January 29, 1997
and  January 27,  1998,  and such  subsequent  amendments  were  approved by the
stockholders on May 28, 1997 and May 27, 1998, respectively (the "1994 Plan").

     B. On March 24,  1999,  the Board  approved  an  increase  in the number of
shares  that  the  Company  may  issue  pursuant  to the 1994  Plan and  certain
additional amendments to the 1994 Plan.

     C. On March 24, 1999, the Board approved certain  additional  amendments to
the 1994 Plan  pursuant to the  Employment  Agreement  dated as of April 1, 1999
between the Corporation and Barrett A. Toan.

                                    AMENDMENT

     1. DEFINITIONS. Capitalized terms set forth in this Fourth Amendment to the
1994 Plan (the "Fourth Amendment") shall be as defined in the 1994 Plan.

     2.  AMENDMENT  TO  SECTION  1,  DEFINITION  OF  "CHANGE  IN  CONTROL".  The
definition  of the term  "Change  in  Control"  in Section 1 of the 1994 Plan is
hereby amended by adding the following sentence to the end of such definition:

     Notwithstanding anything to the contrary herein, "Change in Control" or any
other  substantially  similar term that is defined in the  Employment  Agreement
shall have the meaning given such term in the  Employment  Agreement in order to
give effect to the provisions of such Agreement.

     3.  AMENDMENT  TO SECTION 1,  DEFINITION  OF  "EMPLOYMENT  AGREEMENT".  The
definition  of the term  "Employment  Agreement" is hereby added to Section 1 of
the 1994 Plan as set forth below:

     "Employment   Agreement"  shall  mean  that  certain  employment  agreement
effective as of April 1, 1999 between Barrett A. Toan and Express Scripts, Inc.,
as such agreement may be amended from time to time.

     4. AMENDMENT TO SECTION 4.2. Section 4.2 of the 1994 Plan is hereby amended
by adding a new Section 4.2(e) as set forth below:

     (e)  EMPLOYMENT  AGREEMENT.  To the extent that the  provisions  of Section
4.2(c), Section 4.2(d) or any Option Agreement evidencing outstanding Options or
Restricted Shares conflict with any provisions of the Employment Agreement,  the
Employment  Agreement shall govern as to Options granted,  and Restricted Shares
issued, to the employee named therein.

     5. AMENDMENT TO SECTION 5.1. Section 5.1 of the 1994 Plan is hereby amended
by deleting  such section in its entirety and replacing it with the language set
forth below:

     5.1 IMPACT OF CHANGE OF CONTROL EVENT

     Except as otherwise  provided in the  Employment  Agreement with respect to
Options granted, and Restricted Shares issued, to the employee named therein and
notwithstanding any other provision of the Plan to the contrary, in the event of
a Change in Control  (i) all  outstanding  Options,  whether  or not  previously
exercisable and vested, shall terminate  immediately and become null and void on
the Change in Control Date, and (ii) any Restricted  Shares shall be redeemed by
the Company and  canceled as of the Change in Control  Date;  and in either case
the Company shall pay such Optionee the amount, if any, determined in accordance
with Section 5.2 in lieu of such Options or Restricted Shares.

     6. AMENDMENT TO SECTION 5.4. Section 5.4 of the 1994 Plan is hereby amended
by adding to the end of such Section the sentence set forth below:

     To the  extent  that  the  provisions  of this  Section  5.4 or any  Option
Agreement evidencing  outstanding Options or Restricted Shares conflict with any
provisions of the Employment Agreement, the Employment Agreement shall govern as
to Options granted, and Restricted Shares issued, to the employee named therein.

     7.  AMENDMENT  TO  GRANDFATHER  CLAUSE.  The  grandfather   provision  that
immediately  follows  Section 7.7 of the 1994 Plan is hereby amended by deleting
the  italicized  lead-in  thereto and  replacing  it with the language set forth
below:

     PRIOR TO  AMENDMENT  AND  RESTATEMENT,  SECTION 5, WHICH WILL  CONTINUE  TO
GOVERN  CURRENTLY  OUTSTANDING  AWARDS OF STOCK  OPTIONS AND  RESTRICTED  SHARES
(EXCEPT AS TO OPTIONS AND  RESTRICTED  SHARES HELD BY THE EMPLOYEE  NAMED IN THE
EMPLOYMENT AGREEMENT), FORMERLY PROVIDED AS FOLLOWS:

     8.  EFFECTIVE  DATE OF THE  FOURTH  AMENDMENT;  STOCKHOLDER  APPROVAL.  The
effective  date of this Fourth  Amendment  shall be March 24, 1999.  This Fourth
Amendment  shall  be  submitted  for the  approval  of the  stockholders  of the
Corporation  at  the  next  annual  meeting  thereof  on  May  26,  1999  or any
adjournment  thereof,  and,  if not  approved by the  stockholders,  this Fourth
Amendment shall be null and void.

<PAGE>

                                    APPENDIX II


                              EXPRESS SCRIPTS, INC.
                   AMENDED AND RESTATED 1992 STOCK OPTION PLAN


1.       PURPOSES; DEFINITIONS

     The  purposes  of the Plan  are to  further  the  growth,  development  and
financial  success of the Company by providing  incentives to those officers and
other key  employees  who have the  capacity  for  contributing  in  substantial
measure  toward the growth and  profitability  of the  Company and to assist the
Company in  attracting  and  retaining  employees  with the ability to make such
contributions.

     To accomplish  such purposes,  the Plan provides that the Company may grant
Incentive Stock Options and Nonqualified Stock Options.

     Whenever  the  following  terms are used in the Plan,  they  shall have the
meaning specified below unless the context clearly indicates to the contrary.

     "Board" shall mean the Board of Directors of the Company.

     "Cause" shall mean the willful failure by an Employee to perform his duties
with the Company,  a Parent or a Subsidiary  or the willful  engaging in conduct
which is injurious to the Company,  a Parent or any  Subsidiary,  monetarily  or
otherwise, as determined by the Committee in its sole discretion, provided that,
if the Employee has entered into an employment  agreement with the Company,  the
Committee,  in its sole  discretion,  may determine to substitute the definition
set forth in such agreement.

     "Change in Control" shall mean the following:

     (i) The first date on which both of the following  conditions  shall exist:
(A) New York Life Insurance  Company ("New York Life") shall have ceased to be a
Parent,  and (B) a "person" (as such term is used in Section  13(d) and 14(d) of
the Exchange Act), other than the Company or a Related Entity is the "beneficial
owner"  (as  defined  in  Rule  13d-3  under  the  Exchange  Act),  directly  or
indirectly,  of  securities of the Company  representing  fifty percent (50%) or
more of the combined voting power for the election of directors of the Company's
then outstanding securities;

     (ii) the shareholders of the Company approve a plan of complete liquidation
of the Company; or

     (iii) the  shareholders of the Company approve an agreement for the sale or
disposition by the Company of all or  substantially  all of the Company's assets
or any transaction having a similar effect.

     "Change in Control  Date"  shall  mean,  in the case of a Change in Control
defined in clause (i) or (ii) of the definition  thereof,  the date on which the
event occurs,  and in the case of a Change in Control defined in clause (iii) of
the definition thereof, the date on which the transaction closes.

     "Change in Control Price" shall mean, in a Change in Control transaction in
connection with which New York Life receives  consideration  for the transfer or
cancellation of its voting securities, the per share amount received by New York
Life; and in the case of any other Change in Control transaction, the greater of
the highest Fair Market Value or the highest price per share paid in a bona fide
transaction  related to such  Change in  Control at any time  during the 60 days
immediately preceding the Change in Control Date.

     "Code" shall mean the Internal  Revenue Code of 1986,  as amended from time
to time.

     "Committee" shall mean the Compensation  Committee of the Board,  appointed
as provided in Section 6.1.

     "Company" shall mean Express Scripts, Inc., a Delaware corporation, and any
successor corporation.

     "Comparable   Employment"  shall  mean  employment  with  the  Company  any
successor to the Company's  business  following a Change in Control  pursuant to
which:

     (i) the  responsibilities  and duties of the Employee are substantially the
same  as  before  the  Change  of  Control  (such  changes  as  are a  necessary
consequence  of the fact  that  the  securities  of the  Company  are no  longer
publicly  traded if the Company's  securities  cease to be publicly  traded as a
consequence  of the  Change  of  Control  shall  not be  considered  a change in
responsibilities  or duties),  and the other terms and  conditions of employment
following  the  Change in  Control  do not  impose on the  Employee  obligations
materially more burdensome than those to which the Employee was subject prior to
the Change in Control;

     (ii) the aggregate compensation  (including salary, bonus and other benefit
plans,  including option plans) of such Employee is  substantially  economically
equivalent to or greater than such Employee's aggregate compensation immediately
prior to the Change in Control Date. In making such determination there shall be
taken  into   account   all   contingent   or   unvested   compensation,   under
performance-based  compensation plans or otherwise,  with appropriate adjustment
for rights of forfeiture, vesting rules and other contingencies to payment; and

     (iii) the Employee is not required to relocate from the  metropolitan  area
of his or her residence  immediately  preceding the Change in Control (A) unless
the Company or such  successor pays the cost of such  relocation  (including any
loss  and  expenses  that the  employee  may  incur  upon the sale of his or her
residence),  (B) if the  relocation  is to an area with a higher  cost of living
than  the  area of the  Employee's  residence  prior  to such  relocation,  such
Employee's  compensation is equitably  adjusted to account for such  difference,
(C) unless the Employee is employed  under a written  contract for a term of not
less than three (3) years, and (D) is required to make only one such move during
the first three years of the written contract.

     "Effective Date" shall have the meaning set forth in Section 7.1.

     "Employee" shall mean any employee  (including any officer whether or not a
director) of the Company,  or of any corporation which is then a Subsidiary that
has been designated by the Board to participate in the Plan.

     "Early  Retirement"  shall  mean  retirement  by an  Employee  from  active
employment  with the Company,  a Parent or any  Subsidiary  (i) with the express
consent for purposes of the Plan of the Committee or such officer of the Company
as the Committee may designate  from time to time, or (ii) pursuant to the early
retirement  provisions of a pension plan maintained by the Company,  a Parent or
any Subsidiary.

     "Exchange Act" shall mean the Securities Exchange Act of 1934, as amended.

     "Fair Market  Value" per Share as of a particular  date shall mean,  unless
otherwise determined by the Committee:

     (i) the closing sales price per Share on a national securities exchange for
the last preceding date on which there was a sale of Shares on such exchange;

     (ii) if clause  (i) does not apply and the  Shares  are then  quoted on the
National  Association of Securities Dealers Automated Quotation system (known as
"NASDAQ"),  the closing  price per Share as reported on such system for the last
preceding date on which a sale was reported;

     (iii) if clause (i) or (ii) does not apply and the  Shares are then  traded
on an  over-the-counter  market, the average of the closing bid and asked prices
for the Shares in such  over-the-counter  market for the last  preceding date on
which such bid and asked prices were quoted; or

     (iv) if the Shares are not then listed on a national securities exchange or
traded  in an  over-the-counter  market,  such  value  as the  Committee  in its
discretion may determine.

     "Incentive Stock Option" shall mean an Option intended to be and designated
as an "incentive stock option" within the meaning of Section 422 of the Code.

     "Nonqualified  Stock  Option" shall mean an Option that is not an Incentive
Stock Option.

     "Normal  Retirement"  shall mean  retirement  by an  Employee  from  active
employment  with  the  Company,  a  Parent  or any  Subsidiary  (i) on or  after
attainment of age  sixty-five  (65),  or (ii) pursuant to the normal  retirement
provisions  of a  pension  plan  maintained  by the  Company,  a  Parent  or any
Subsidiary.

     "Option"  shall mean an option to  purchase  Shares  (including  Restricted
Shares, if the Committee so determines) granted pursuant to the Plan.

     "Option  Agreement"  shall  mean an Option  Agreement  to be  entered  into
between  the  Company  and an  Optionee,  which  shall  set  forth the terms and
conditions of the Options granted to such Optionee.

     "Optionee"  shall  mean an  Employee  to whom an  Option  has been  granted
pursuant to the Plan.

     "Parent" shall mean any corporation (other than the Company) in an unbroken
chain of corporations ending with the Company if each of the corporations (other
than the Company),  or if each group of commonly controlled  corporations,  then
(i) is the "beneficial owner" (as defined in Rule 13d-3 under the Exchange Act),
directly or indirectly,  of securities of one or more of the other  corporations
in such chain  representing  fifty percent (50%) or more of the combined  voting
power  for the  election  of  directors  for  such  corporation,  or (ii) if the
determination  of whether a  corporation  is a Parent is being made to determine
whether the requirements  governing  Incentive Stock Options have been met, owns
stock  possessing fifty percent (50%) or more of the total combined voting power
of all classes of stock of such corporation.

     "Payment  Date"  shall  mean a date not later than ten (10)  business  days
following the Change in Control Date.

     "Permanent  Disability'" shall mean that the Employee has suffered physical
or mental  incapacity  of such  nature as to  prevent  him from  engaging  in or
performing the principal  duties of his customary  employment or occupation on a
continuing or sustained basis, provided that, if an Employee has entered into an
employment  agreement with the Company,  the Committee,  in its sole discretion,
may determine to substitute  the  definition  set forth in such  agreement.  All
determinations  as to the date and extent of disability of any Employee shall be
made by the Committee  upon the basis of such evidence as it deems  necessary or
desirable.

     "Plan" shall mean this Express  Scripts,  Inc.  1992 Stock Option Plan,  as
hereinafter amended from time to time.

     "Related  Entity" shall mean a Parent, a Subsidiary or any employee benefit
plan (including a trust forming a part of such Plan)  maintained by the Company,
a Parent or a Subsidiary.

     "Restricted  Shares"  shall mean Shares  which are  received by an Optionee
upon the exercise of an Option and are subject to the restrictions  described in
Section 4.2(c).

     "Restriction  Period" shall mean the period during which Restricted  Shares
are subject to the restrictions set forth in Section 4.2(c).

     "Retirement" shall mean Early Retirement or Normal Retirement.

     "Securities Act" shall mean the Securities Act of 1933, as amended.

     "Share" shall mean a share of the Company's  Class A Common Stock,  .01 par
value.

     "Stockholder  Approval  Date"  shall have the  meaning set forth in Section
7.1.

     "Subsidiary"   shall  mean  any   corporation   in  an  unbroken  chain  of
corporations  beginning with the Company,  if each such corporation  (other than
the last  corporation  in the  unbroken  chain),  or if each  group of  commonly
controlled  corporations,  then owns  fifty  percent  (50%) or more of the total
combined voting power in one of the other corporations in such chain.

     "Ten-Percent  Stockholder"  shall  mean an  Employee,  who,  at the time an
Incentive  Stock  Option is to be  granted to the  Employee,  owns  (within  the
meaning of Section 422(b)(6) of the Code) stock possessing more than ten percent
(10%) of the total combined voting power of all classes of stock of the Company,
a Parent or a Subsidiary.

     "Termination of Employment" shall mean the time when the  employee-employer
relationship  between the Employee and the Company,  a Parent or a Subsidiary is
terminated for any reason whatsoever,  but excluding any termination where there
is a simultaneous reemployment by either the Company, a Parent or a Subsidiary.

2.       SHARES SUBJECT TO THE PLAN

     2.1 SHARES SUBJECT TO PLAN

     The maximum number of Shares that may be issued or transferred  pursuant to
Options under this Plan shall initially be 700,000.  Thereafter,  such number of
Shares shall increase annually,  effective as of each January 1, commencing with
January 1, 1993 and ending January 1, 1999, by 70,000 Shares.  The Company shall
reserve  such  number  of  Shares  for  the  purposes  of the  Plan,  out of its
authorized but unissued Shares or out of Shares held in the Company's  treasury,
or partly out of each.  If any Shares that have been  subject to an Option cease
to be subject thereto, or any Restricted Shares received by an Optionee upon the
exercise of an Option are forfeited to the Company in accordance with the Option
Agreement, such Shares may again be the subject of Options hereunder.

2.2      CHANGES IN COMPANY'S SHARES

     In the event that the  outstanding  Shares are  hereafter  changed  into or
exchanged  for a different  number or kind of shares or other  securities of the
Company, or of another corporation, by reason of reorganization, merger or other
subdivision,  consolidation,  recapitalization,  reclassification,  stock split,
issuance of warrants or rights, stock dividend, combination of shares or similar
event,  appropriate adjustments shall be made by the Committee in the number and
kind of Shares  subject to and which may be subject to Options  under this Plan,
and the purchase  price per Share,  to prevent  dilution or  enlargement  of the
benefits granted to, or available for, Optionees,  including  adjustments of the
limitations in Section 2.1 of the maximum number and kind of shares which may be
issued hereunder as Shares.

3.       ELIGIBILITY FOR OPTION GRANTS

     Any  Employee  who is employed on the senior  staff,  or as a member of the
sales force or who is  designated  by the  Committee as a key Employee  shall be
eligible to receive  Options  under this Plan.  In no event shall any Options be
granted to any member of the Board who is not an Employee.  The Committee  shall
from time to time, in its sole discretion:

     (a) select from among the eligible Employees  (including Optionees who have
previously  received Options) such of them as in its opinion should be permitted
to receive Options under this Plan;

     (b) determine the number of Shares to be subject to each Option  granted to
such selected Employees,  provided that, in no event shall Options be granted to
any Employee in excess of 400,000;

     (c)  determine  the terms and  conditions  applicable to each Option (which
need not be identical), consistent with the Plan; and

     (d) establish such  conditions as to the manner of exercise of such Options
as it may deem necessary,  including but not limited to, requiring  Optionees to
enter into agreements  regarding  transferability  and other  restrictions  with
respect to Shares issuable upon exercise of such Options.

4.       TERMS OF OPTIONS AND SHARES

     4.1 OPTION AGREEMENT

     Options shall be granted only pursuant to an Option Agreement,  which shall
be executed by the Optionee and an  authorized  officer of the Company and which
shall  contain  such terms and  conditions  as the  Committee  shall  determine,
consistent  with the  Plan,  including  appropriate  vesting  arrangements.  The
aggregate  Fair Market Value  (determined as of the date of grant) of the Shares
with respect to which  Incentive  Stock Options  granted under this Plan and all
other  option  plans  of the  Company,  the  Parent  and any  Subsidiary  become
exercisable by an Employee  during any calendar year shall not exceed  $100,000.
To the extent the  limitation  set forth in the preceding  sentence is exceeded,
the Options with respect to such excess amount shall be treated as  Nonqualified
Stock Options.

     4.2 TERMS

     The  Options   granted   hereunder  shall  have  the  following  terms  and
conditions:

     (a) PRICE.  The purchase price for the Shares subject to an Option,  or the
manner in which such purchase price is to be determined,  shall be determined by
the Committee,  in its sole discretion,  and set forth in the Option  Agreement,
provided  that the  purchase  price per Share shall not be less than one hundred
percent  (100%) of the Fair Market Value of a Share as of the date the Option is
granted (110% in the case of an Incentive  Stock Option granted to a Ten-Percent
Stockholder).

     (b) TERM.  Options shall be for such term as the Committee shall determine,
and as shall be set  forth in each  Option  Agreement,  provided  that no Option
shall be  exercisable  after the  expiration  of ten  years  from the date it is
granted  (five  years in the case of an  Incentive  Stock  Option  granted  to a
Ten-Percent Stockholder).

     (c) VESTING.  Options shall be exercisable in such installments (which need
not be equal) and at such times as may be  designated  by the  Committee and set
forth in the Option Agreement.  To the extent not exercised,  installments shall
accumulate and may be exercised, in whole or in part, at any time after becoming
exercisable,  but not later than the date the Option expires.  The Committee may
accelerate the  exercisability  of any Option,  or the vesting of any Restricted
Shares, or portion thereof at any time.

     The  Committee  may in its  discretion  provide  that  all or a part of the
Shares received by an Optionee upon the exercise of a Nonqualified  Stock Option
shall be Restricted  Shares subject to any or all of the following  restrictions
or conditions:

     (i) Subject to the provisions of the Plan and the Option Agreement,  during
a period  set by the  Committee  commencing  with  the date of the  grant of the
Option (the  "Restriction  Period"),  the Optionee may not be permitted to sell,
transfer,  pledge  or  assign  the  Restricted  Shares.  The  Committee  in  its
discretion may provide for the lapse of such  restrictions in  installments  and
may accelerate or waive such restrictions in whole or in part, based on service,
performance and/or such other factors or criteria as the Committee may determine
in its discretion,

     (ii)  Except as  provided  in this  clause  (ii) and clause (i) above,  the
Optionee shall have, with respect to the Restricted Shares, all of the rights of
a  shareholder  of the Company,  including  the right to vote the Shares and the
right to receive any cash  dividends.  Stock  dividends  issued with  respect to
Restricted  Shares  shall be treated as  additional  Restricted  Shares that are
subject to the same  restrictions  and other terms and conditions  that apply to
the Shares with respect to which such dividends are issued.

     (iii) Subject to the applicable provisions of the Option Agreement and this
Section,  upon  Termination of Employment  during the  Restriction  Period,  all
Shares still subject to  restriction  will vest, or be forfeited,  in accordance
with the terms and conditions established by the Committee at grant.

     (iv) If and when the Restriction  Period expires without a prior forfeiture
of the Restricted Shares, certificates for an appropriate number of unrestricted
Shares shall be delivered to the Optionee promptly.

     (d) Termination of Employment. Except as provided in this Section 4.2(d) or
in the Option Agreement evidencing such an Option, in the event of a Termination
of  Employment  of an Optionee,  all  outstanding  Options held by such Optionee
shall terminate immediately, provided that, if such Termination of Employment is
due to the  Optionee's  death,  Permanent  Disability,  or  Retirement or by the
Company, a Parent or a Subsidiary without Cause, all outstanding Options held by
such Optionee shall  immediately  become fully  exercisable to the extent not so
exercisable,  shall remain  exercisable  for a period of three months  following
such Termination of Employment, and shall thereafter terminate.  Notwithstanding
the  foregoing,  (i) the Committee may provide,  either at the time an Option is
granted  or  thereafter,  that the  Option  may be  exercised  after the  period
provided  for in this  Section  4.2(d),  but in no event  beyond the term of the
Option,  and (ii) no provision in this Section  4.2(d) shall extend the exercise
period of an Option beyond its original term.

     4.3 NON-TRANSFERABILITY

     No Option granted under the Plan shall be  transferable  by the Optionee to
whom granted otherwise than by will or the laws of descent and distribution, and
an Option may be  exercised  during the  lifetime of such  Optionee  only by the
Optionee or his guardian or legal representative. The terms of such Option shall
be  binding  upon  the  beneficiaries,   executors,  administrators,  heirs  and
successors of the Optionee.

     4.4 METHOD OF EXERCISE

         The exercise of an Option shall be made only by a written notice
delivered in person or by mail to the Secretary of the Company at the Company's
principal executive office, specifying the number of Shares to be purchased and
accompanied by full payment therefor and otherwise in accordance with the Option
Agreement pursuant to which the Option was granted. The purchase price for any
Shares purchased pursuant to the exercise of an Option shall be paid in full
upon such exercise in cash, by check or, at the discretion of the Committee and
upon such terms and conditions as the Committee shall approve, by transferring
previously owned Shares to the Company, having Shares withheld or exercising
pursuant to a "cashless exercise" procedure, or any combination thereof. Any
Shares transferred to the Company as payment of the purchase price under an
Option shall be valued at their Fair Market Value on the day preceding the date
of exercise of such Option. If requested by the Committee, the Optionee shall
deliver the Option Agreement evidencing the Option to the Secretary of the
Company who shall endorse thereon a notation of such exercise and return such
Option Agreement to the Optionee. Not less than one hundred (100) Shares may be
purchased at any time upon the exercise of an Option unless the number of Shares
so purchased constitutes the total number of Shares then purchasable under the
Option or the Committee determines otherwise in its sole discretion.

     4.5 RIGHTS AS STOCKHOLDER

     No Optionee shall be deemed for any purpose to be or to have the rights and
privileges of the owner of any Shares subject to any Option unless and until (a)
the Option shall have been exercised pursuant to the terms thereof,  and (b) the
Company shall have issued the Shares to the Optionee.

5.       CHANGE IN CONTROL PROVISIONS

     5.1 IMPACT OF CHANGE IN CONTROL EVENT

     Notwithstanding  anything herein to the contrary,  in the event of a Change
in Control (i) all outstanding  Options,  whether or not previously  exercisable
and vested,  shall terminate  immediately and become null and void on the Change
in Control Date, and (ii) any Restricted Shares shall be redeemed by the Company
and  canceled as of the Change in Control  Date;  and in either case the Company
shall pay such  Optionee  the amount,  if any,  determined  in  accordance  with
Section 5.2 in lieu of such options or Restricted Shares.

     5.2 PAYMENT FOR OPTIONS AND RESTRICTED SHARES

     (a) NO  OFFER OF  COMPARABLE  EMPLOYMENT.  If an  Optionee  is not  offered
Comparable  Employment  with  the  Company  or any  successor  to the  Company's
business on or prior to the Change in Control  Date,  the Company  shall pay the
Optionee for each of his Options that was terminated  pursuant to Section 5.1 an
amount  equal to the  excess,  if any of the  Change in  Control  Price over the
purchase  price for the shares subject to such Option,  and for each  Restricted
Share that was redeemed and  canceled,  an amount equal to the Change in Control
Price.  Such aggregate  amount shall be paid to the Optionee by the Company in a
cash lump sum on the Payment Date.

     (b) OFFER OF COMPARABLE  EMPLOYMENT ACCEPTED. If an Optionee is offered and
accepts Comparable Employment with the Company or any successor to the Company's
business,  the Company  shall pay the  Optionee for each of his Options that was
canceled  pursuant to Section 5.1 an amount equal to the excess,  if any, of the
Change in Control Price over the purchase  price for the shares  subject to such
Option, and for each Restricted Share that was redeemed and canceled,  an amount
equal to the Change in Control Price. Such aggregate amount shall be paid to the
Optionee as follows:

     (i) any amount  attributable to Options that were vested on or prior to the
Change in Control Date shall be paid to the Optionee on the Payment Date.

     (ii) any amount attributable to Options that would have become vested after
the Change in Control Date but prior to the second  anniversary of the Change in
Control  Date,  or to  Restricted  Shares  the  transferability  and  forfeiture
restrictions on which would have lapsed during such period, shall be paid to the
Optionee  on the date  that the  Options  otherwise  would  have  vested  or the
restrictions on such Restricted  Shares otherwise would have lapsed, as the case
may be; and

     (iii) any other amounts due to the Optionee and not  disbursed  pursuant to
the preceding clauses (i) and (ii) shall be paid in two cash installments on the
first  and  second  anniversary  of  the  Change  in  Control  Date,  the  first
installment  being  equal to one-half of the amount that would have been paid in
the absence of the  preceding  clause (ii) above minus the amount of any payment
made prior to such first installment  pursuant to the preceding clause (ii), and
the second installment being equal to the remaining balance due to the Optionee.

     Notwithstanding the foregoing,  in the event of a Termination of Employment
of the Optionee at any time before such second anniversary, other than by reason
of (A) the Optionee's death, Permanent Disability or Retirement, (B) termination
by the Company or any successor to the Company's  business without Cause, or (C)
termination  by the Employee  after his  employment  ceases for any reason to be
Comparable Employment,  the Optionee shall forfeit any right to, an shall not be
paid,  any unpaid  installments.  In the case of a Termination of Employment for
any reason  specified in clause (A), (B) or (C) of the preceding  sentence,  all
unpaid  installments  shall be paid to the  Optionee  in a cash lump sum  within
thirty (30) days of such Termination of Employment.

     (c) OFFER OF  COMPARABLE  EMPLOYMENT  REJECTED.  If an  Optionee is offered
Comparable  Employment  with  the  Company  or any  successor  to the  Company's
business  and he rejects  such offer,  the Company  will pay to the Optionee for
each of his Options  that was fully  vested  immediately  prior to the Change in
Control  Date,  an amount equal to the excess,  if any, of the Change in Control
Price over the purchase  price for the shares  subject to such  Option,  and for
each  Restricted  Share that was  redeemed  and  canceled an amount equal to the
lesser of (i) the  Change  in  Control  Price,  or (ii) the  amount  paid by the
Optionee to acquire such Restricted Shares from the Company.  Except as provided
in the  preceding  sentence,  the Company  shall not be required to pay, and the
Optionee  shall not be entitled to receive,  any amount  under this Section 5 or
otherwise in connection with the  cancellation of any other Options  pursuant to
Section 5.1. Any amount  payable to the Optionee  hereunder  shall be payable on
the Payment Date.

     5.3 ESCROW OF DEFERRED PAYMENTS

     (a) Any amount  that may become  payable to  Optionees  pursuant to Section
5.2(b) above shall be  deposited on the Payment Date in escrow with a U.S.  bank
with unrestricted capital and surplus of not less than $100,000,000.  Such funds
shall be invested in securities  issued or fully guaranteed as to both principal
and interest by the U.S. Government.  Interest earned shall be allocated ratably
among the  Optionees  receiving  payment of such funds and,  if any  amounts are
forfeited by an  Optionee,  to the  Company,  and shall be  disbursed  when such
payments are made.

     (b) DISBURSEMENTS

     (i) Subject to the following  clauses (ii) and (iii),  the escrow agreement
shall  provide for  disbursements  to  Optionees in  accordance  with a schedule
attached thereto and prepared in accordance with Section 5.2(b)(ii) and (iii).

     (ii) If an Optionee  forfeits his rights to any  payments  from the escrow,
the Company shall give written  notice thereof  contemporaneously  to the escrow
agent and the  Optionee  by  certified  or  registered  mail (in the case of the
Optionee,  to the last  known  address  of the  Optionee  on the  records of the
Company),  stating the reason for such  forfeiture and the amount  thereof.  The
escrow  agent  shall  disburse  the amount  stated in such notice to the Company
thirty  (30) days after  receipt  thereof  unless  prior to such time the escrow
agent receives  written  notice of objection  from the Optionee.  If a notice of
objection is  received,  the escrow  agent shall  disburse  such funds only upon
order of a court of competent  jurisdiction or upon written  instructions signed
by both the Company and the Optionee.

     (iii) If an Optionee or his  successor  in interest  becomes  entitled to a
payment from the escrow prior to the time stated in the  schedule,  the Optionee
or such successor  shall give written notice  thereof  contemporaneously  to the
escrow agent and the Company by certified or registered mail, stating the reason
for such  accelerated  payment and the amount  thereof.  The escrow  agent shall
disburse  the amount  stated in such notice to the  Optionee  or such  successor
thirty  (30) days after  receipt  thereof  unless  prior to such time the escrow
agent  receives  written  notice of objection  from the Company.  If a notice of
objection is  received,  the escrow  agent shall  disburse  such funds only upon
order of a court of competent  jurisdiction or upon written  instructions signed
by both the Company and the Optionee.

     5.4 PARACHUTE PAYMENTS

     In the  event  that  the  aggregate  present  value of the  payments  to an
Optionee under this Plan, and any other plan, program, or arrangement maintained
by the Company (a Subsidiary or, if applicable, a Parent) constitutes an "excess
parachute  payment"  (within the meaning of Section  280G(b)(1) of the Code) and
the excise tax on such payment  would cause the net  parachute  payments  (after
taking into account  federal,  state and local income and excise taxes) to which
the  Optionee  otherwise  would be  entitled,  to be less than what the Optionee
would have netted  (after  taking into account  federal,  state and local income
taxes) had the present value of his total parachute  payments equaled $1.00 less
than three times his "base amount" (within the meaning of Section  280G(b)(3)(A)
of the Code), the Optionee's total "parachute  payments"  (within the meaning of
Section  280G(b)(2)(A)  of the Code) shall be reduced  (by the minimum  possible
amount) so that their aggregate present value equals $1.00 less than three times
such base amount. For purposes of this calculation, it shall be assumed that the
Optionee's tax rate will be the maximum marginal federal, state and local income
tax rate on earned  income,  with such maximum  federal rate to be computed with
regard  to  Section  1(g) of the Code,  if  applicable.  In the  event  that the
Optionee and the Company or any successor to the  Company's  Business are unable
to agree as to the amount of the reduction described above, if any, the Optionee
shall select a law firm or accounting firm from among those regularly  consulted
(during the twelve-month  period immediately prior to the Change in Control that
resulted in the  characterization  of the payments as parachute payments) by the
Company  regarding  federal income tax or employee  benefit matters and such law
firm or accounting firm shall determine, at the Company's expense, the amount of
such  reduction  and such  determination  shall be final  and  binding  upon the
Optionee and the Company or such successor.

6.       ADMINISTRATION

     6.1 COMPENSATION COMMITTEE

     The Plan shall be  administered  by the Committee which shall consist of at
least three directors of the Company,  appointed by the Board and holding office
at the  pleasure of the Board.  All  Committee  members  shall be members of the
Board.  All members of the Committee  must be  "disinterested  persons," as such
term  is  described  in  Rule  16b-3  adopted  by the  Securities  and  Exchange
Commission  under the Exchange Act, if and as such Rule is in effect and, to the
extent  required by Section 162(m) of the Code and the  Regulations  promulgated
thereon, an "outside director" within the meaning thereof.

     6.2 DUTIES AND POWERS OF COMMITTEE

     It shall be the duty of the Committee to conduct the general administration
of the Plan in accordance  with its terms and  provisions.  The Committee  shall
have the power to interpret the Plan and the Option Agreements and to adopt such
rules for the administration,  interpretation and application of the Plan as are
consistent therewith and to interpret, amend or revoke any such rules.

     6.3 MAJORITY RULE

     The  Committee  shall act by a  majority  of its  members  in  office.  The
Committee  may act  either  by vote at a  telephonic  or other  meeting  or by a
memorandum or other written instrument signed by a majority of the Committee .

     6.4 COMPENSATION; PROFESSIONAL ASSISTANCE; GOOD FAITH ACTIONS

     Members of the Committee may receive such  compensation  for their services
as members as may be  determined  by the Board.  All  expenses  and  liabilities
incurred by members of the Committee in connection  with the  administration  of
the Plan shall be borne by the  Company.  The  Committee  may employ  attorneys,
consultants,  accountants,  appraisers,  or other persons.  The  Committee,  the
Company  and its  officers  and  directors  shall be  entitled  to rely upon the
advice,  opinions or valuations  of any such persons.  All actions taken and all
interpretations  and determinations made by the Committee in good faith shall be
final and binding  upon all  Optionees,  the  Company  and all other  interested
persons.  No member of the Committee shall be personally  liable for any action,
determination or  interpretation  made in good faith with respect to the Plan or
the Options,  and all members of the Committee  shall be fully  protected by the
Company in respect to any such action, determination or interpretation.

7.       OTHER PROVISIONS

     7.1 EFFECTIVE DATE

     (a) EFFECTIVE  DATE. The Plan shall become  effective as of the date of the
closing of the sale by the Company of shares of Common  Stock to the public (the
"Effective Date") and shall continue in effect until March 31, 2002 or until the
Change in Control Date, whichever is sooner;  provided,  that termination of the
Plan shall not affect the rights of any Optionee with respect to Options granted
or  Restricted  Shares  acquired   contemporaneously   with  or  prior  to  such
termination.  Notwithstanding  anything herein or in any Option Agreement to the
contrary,  Options  granted  hereunder  shall not vest and may not be  exercised
prior to the Effective  Date,  and, in the event that the Effective Date has not
occurred  on or prior to July 1, 1992 (or such later date as  determined  by the
Board in its sole  discretion),  all Options granted prior to such date shall be
null and void and of no effect,  retroactive to the date of grant,  and the Plan
shall  be null  and  void  and of no  effect,  retroactive  to the date of Board
approval.

     (b) EFFECT OF CERTAIN  AMENDMENTS.  The amendments approved by the Board of
Directors on March 22, 1995, other than the amendments to sections 2.1, 3(b) and
6.1 hereof,  shall be effective only with respect to Options  granted after such
date,  provided,  however,  that the  Committee may enter into  agreements  with
Optionees  whose options were granted prior to such date to make such amendments
applicable, in whole or in part, to such Options.

     7.2 AMENDMENT, SUSPENSION OR TERMINATION OF THE PLAN

     The  Plan  may be  wholly  or  partially  amended  or  otherwise  modified,
suspended or terminated at any time or from time to time by the Board; provided,
however,  that,  except as  provided  in  Section  2.2,  no  amendment  shall be
effective  unless  approved by the  affirmative  vote of a majority of the votes
eligible  to be cast at a meeting of  stockholders  of the  Company  held within
twelve  (12)  months  of the date of  adoption  of such  amendment,  where  such
amendment will:

     (a) increase the number of Shares as to which  Options may be granted under
the Plan;

     (b) change the class of persons eligible to participate in the Plan;

     (c) change the  minimum  purchase  price of Shares  pursuant  to Options as
provided herein;

     (d) extend the maximum period for granting or exercising  Options  provided
herein; or

     (e) otherwise  materially increase the benefits accruing to Optionees under
the Plan.

     From and after the Effective  Date,  neither the amendment,  suspension nor
termination  of the Plan shall,  without the consent of the  Optionee,  alter or
impair  any  rights or  obligations  under any Option  theretofore  granted.  No
Options may be granted during any period of suspension nor after  termination or
expiration of the Plan.

     7.3 EFFECT OF PLAN UPON OTHER COMPENSATION AND INCENTIVE PLANS

     The  adoption  of the Plan  shall  not  affect  any other  compensation  or
incentive plans in effect for the Company or any Subsidiary. Nothing in the Plan
shall be  construed  to limit  the right of the  Company  or any  Subsidiary  to
establish  any other forms of incentives  or  compensation  for Employees of the
Company or any Subsidiary.

     7.4 REGULATIONS AND OTHER APPROVALS; GOVERNING LAW

     (a) The Plan and the  rights of all  persons  claiming  hereunder  shall be
construed and  determined  in accordance  with the laws of the State of Delaware
without giving effect to the choice of law principles thereof.

     (b) The obligation of the Company to sell or deliver Shares with respect to
Options  granted under the Plan shall be subject to all applicable  laws,  rules
and regulations, including all applicable federal and state securities laws, and
the obtaining of all such  approvals by  governmental  agencies as may be deemed
necessary or appropriate by the Committee.

     (c) The Board may make such changes as may be necessary or  appropriate  to
comply with the rules and  regulations of any government  authority or to obtain
the tax benefits  under the  applicable  provisions of the Code and  regulations
promulgated thereunder for Employees granted Incentive Stock Options.

     (d) Each  Option is subject  to the  requirement  that,  if at any time the
Committee determines, in its sole discretion, that the listing,  registration or
qualification  of  Shares  issuable  pursuant  to the  Plan is  required  by any
securities  exchange  or under any  state or  federal  law,  or the  consent  or
approval of any  governmental  regulatory  body is  necessary  or desirable as a
condition of, or in connection  with,  the grant of an Option or the issuance of
Shares,  no Options shall be granted or payment made or Shares issued,  in whole
or in part, unless listing, registration, qualification, consent or approval has
been effected or obtained free of any conditions as acceptable to the Committee.

     (e) In the event that the  disposition of Shares  acquired  pursuant to the
Plan  is  not  covered  by a  then  current  registration  statement  under  the
Securities Act, and is not otherwise exempt from such registration,  such Shares
shall be restricted  against  transfer to the extent  required by the Securities
Act or  regulations  thereunder,  and the Committee  may require any  individual
receiving  Shares  pursuant to the Plan, as a condition  precedent to receipt of
such Shares,  to represent to the Company in writing that the Shares acquired by
such  individual  are  acquired  for  investment  only  and  not  with a view to
distribution.  The  certificate  for such  shall  include  any  legend  that the
Committee deems appropriate to reflect any restrictions on transfer.

     7.5 WITHHOLDING OF TAXES

     No later than the date as to which an amount first  becomes  includable  in
the gross income of an Optionee for Federal  income tax purposes with respect to
any Option  granted under the Plan,  the Optionee  shall pay to the Company,  or
make  arrangements  satisfactory to the Committee  regarding the payment of, any
Federal,  state, or local taxes of any kind required by law or the Company to be
withheld with respect to such amount.  The  obligations of the Company under the
Plan shall be conditional  on such payment or  arrangements  and the Company,  a
Parent and any Subsidiary  shall, to the extent  permitted by law have the right
to deduct  any such  taxes from any  payment  of any kind  otherwise  due to the
Optionee.  In its  discretion,  the  Committee  may permit  Optionees to satisfy
withholding  obligations by delivering previously owned Shares or by electing to
have Shares withheld.

     7.6 NO RIGHT TO CONTINUED EMPLOYMENT

     Nothing  in the  Plan or in any  Option  Agreement  shall  confer  upon any
Optionee  any right to  continue in the employ of the  Company,  a Parent or any
Subsidiary  or shall  interfere  with or  restrict  in any way the  right of the
Company, a Parent and any Subsidiary,  which are hereby expressly  reserved,  to
remove,  terminate  or  discharge  any  Optionee  at any  time  for  any  reason
whatsoever, with or without Cause.

     7.7 TITLES; CONSTRUCTION

     Titles are provided herein for  convenience  only and are not to serve as a
basis for  interpretation  or  construction  of the Plan. The masculine  pronoun
shall include the feminine and neuter and the singular shall include the plural,
when the context so indicates.

     PRIOR TO  AMENDMENT  AND  RESTATEMENT,  SECTION 5, WHICH WILL  CONTINUE  TO
GOVERN  CURRENTLY  OUTSTANDING  AWARDS OF STOCK OPTIONS AND  RESTRICTED  SHARES,
FORMERLY PROVIDED AS FOLLOWS:

5.       CHANGE IN CONTROL PROVISIONS

     In the  event of a Change  in  Control,  (a) all  outstanding  Options  not
previously exercisable and vested shall immediately become fully exercisable and
vested, and (b) the  transferability and forfeiture  restrictions  applicable to
any  Restricted  Shares to the extent not  already  lapsed,  shall  lapse and no
longer be applicable,  and such Shares shall be deemed fully vested and owned by
the Optionee.

     "Change in  Control"  shall  mean the  occurrence  of any of the  following
events at a time when New York Life  Insurance  Company,  A New York mutual life
insurance company, or any successor thereto is not a Parent:

     (i) any  "person,"  as such term is used in Section  13(d) and 14(d) of the
Exchange Act, (other than the Company or a Related Entity,  without the approval
of the Board, becomes the "beneficial owner" (as defined in Rule 13d-3 under the
Exchange Act), directly or indirectly, of securities of the Company representing
fifty  percent  (50%) or more of the  combined  voting power for the election of
directors of the Company's then outstanding securities;

     (ii) during any period of two  consecutive  years beginning on or after the
effective  date of the Plan,  individuals  who at the  beginning  of such period
constitute the Board, and any new director (other than a director  designated by
a person  who has  entered  into an  agreement  with  the  Company  to  effect a
transaction  described in clause (i), (iii) or (iv)) whose election by the Board
or nomination for election by the Company's  shareholders was approved by a vote
of at least  two-thirds  (2/3) of the directors  then still in office who either
were  directors at the  beginning of the period or whose  election or nomination
for election was previously so approved  (unless the approval of the election or
nomination  for election of such new directors was in connection  with an actual
or threatened election or proxy contest),  cease for any reason to constitute at
least a majority thereof;

     (iii) the  shareholders of the Company approve a merger or consolidation of
the Company with any other corporation, other than (x) a merger or consolidation
which  would  result  in  the  voting  securities  of  the  Company  outstanding
immediately   prior  thereto   continuing  to  represent  (either  by  remaining
outstanding  or by being  converted  into  voting  securities  of the  surviving
entity)  more than eighty  percent  (80%) of the  combined  voting  power of the
voting   securities  of  the  Company  or  such  surviving  entity   outstanding
immediately  after such merger or consolidation or (y) a merger or consolidation
effected to implement a recapitalization of the Company (or similar transaction)
in which no "person" (as defined  above in clause (i))  acquires more than fifty
percent (50%) of the combined  voting power for the election of directors of the
Company's then outstanding securities; or

     (iv) the shareholders of the Company approve a plan of complete liquidation
of the Company or an agreement for the sale or disposition by the Company of all
or substantially all of the Company's assets or any transaction having a similar
effect.


<PAGE>

                               FIRST AMENDMENT TO
        EXPRESS SCRIPTS, INC. AMENDED AND RESTATED 1992 STOCK OPTION PLAN

                                    RECITALS

     A. Express Scripts,  Inc. (the  "Corporation")  has an Amended and Restated
1992 Stock  Option Plan (the "1992  Plan"),  which was  amended and  restated on
March 22, 1995 and approved by the stockholders on May 24, 1995.

     B. On March 24, 1999,  the Board of Directors of the  Corporation  approved
certain amendments to the 1992 Plan.

                                    AMENDMENT

     1. DEFINITIONS.  Capitalized terms set forth in this First Amendment to the
1992 Plan (the "First Amendment") shall be as defined in the 1992 Plan.

     2. AMENDMENT TO SECTION 1, DEFINITION OF "EARLY RETIREMENT". The definition
of the term  "Early  Retirement"  in  Section 1 of the 1992 Plan is  amended  by
inserting at the end of clause (ii) the additional language set forth below:

     , provided,  however, that a non-qualified deferred compensation plan shall
not be deemed to be a pension plan for purposes of this definition.

     3.  AMENDMENT  TO  SECTION  1,  DEFINITION  OF  "NORMAL  RETIREMENT".   The
definition  of the term  "Normal  Retirement"  in  Section 1 of the 1992 Plan is
amended by inserting at the end of clause (ii) the additional language set forth
below:

     , provided,  however, that a non-qualified deferred compensation plan shall
not be deemed to be a pension plan for purposes of this definition.

     4. AMENDMENT TO SECTION 1, DEFINITION OF "PLAN". The definition of the term
"Plan" in Section 1 of the 1992 Plan is amended by deleting  such  definition in
its entirety and replacing it with the language set forth below:

     "Plan"  shall mean this Express  Scripts,  Inc.  Amended and Restated  1992
Stock Option Plan, as amended from time to time.

     5.  AMENDMENT TO SECTION 2.1,  SHARES  SUBJECT TO PLAN.  Section 2.1 of the
1992 Plan is amended to read as follows in its entirety:

     The maximum number of Shares that may be issued or transferred  pursuant to
Options under this Plan shall be  2,380,000,  which has been adjusted to reflect
the stock split  effected on October 30, 1998.  The Company  shall  reserve such
number of Shares for the purposes of the Plan out of its authorized but unissued
Shares or out of Shares held in the Company's  treasury,  or partly out of each.
If any Shares that have been subject to an Option  cease to be subject  thereto,
or any Restricted  Shares received by an Optionee upon the exercise of an Option
are  forfeited  to the Company in  accordance  with the Option  Agreement,  such
Shares may again be the subject of Options hereunder.

     6. AMENDMENT TO SECTION 2.2,  CHANGES IN COMPANY'S  SHARES.  Section 2.2 of
the 1992 Plan is hereby amended by inserting at the end of the single  paragraph
of such section the additional language set forth below:

     and  adjustments of the limitation in Section 3(b) of the maximum number of
Shares subject to Options that may be granted to any Employee.

     7. AMENDMENT TO SECTION 3, ELIGIBILITY FOR OPTION GRANTS.  Section 3 of the
1992 Plan is hereby  amended  by  deleting  paragraph  (b) in its  entirety  and
replacing  it with the  language  set forth  below to  reflect  the stock  split
effected on October 30, 1998:

     (b) determine the number of Shares to be subject to each Option  granted to
such selected Employees;  provided, that in no event shall Options be granted to
any Employee in excess of 800,000;

     8.  AMENDMENT TO SECTION 4.4,  METHOD OF EXERCISE.  Section 4.4 of the 1992
Plan is hereby amended by deleting the second sentence  thereof and replacing it
with the language set forth below:

     The purchase price for any Shares purchased  pursuant to the exercise of an
Option  shall be paid in full upon such  exercise  in cash,  by check or, at the
discretion of the Committee and upon such terms and  conditions as the Committee
shall approve, by transferring previously owned Shares to the Company (including
by way of attestation of the Optionee's ownership of such Shares), having Shares
withheld  or  exercising  pursuant to a "cashless  exercise"  procedure,  or any
combination thereof.

     9.  AMENDMENT TO SECTION 6.1,  COMPENSATION  COMMITTEE.  Section 6.1 of the
1992 Plan is hereby  amended  by  deleting  such  section  in its  entirety  and
replacing it with the language set forth below:

     6.1 COMPENSATION COMMITTEE

     The Plan shall be  administered  by the Committee which shall consist of at
least three directors of the Company,  appointed by the Board and holding office
at the  pleasure of the Board.  All  Committee  members  shall be members of the
Board.

     10.  EFFECTIVE  DATE OF THE  FIRST  AMENDMENT;  STOCKHOLDER  APPROVAL.  The
effective  date of this  First  Amendment  shall be March 24,  1999.  This First
Amendment  shall  be  submitted  for the  approval  of the  stockholders  of the
Corporation  at the next annual  meeting  thereof on May 26,  1999,  and, if not
approved by the stockholders, this First Amendment shall be null and void.

<PAGE>

                               SECOND AMENDMENT TO
        EXPRESS SCRIPTS, INC. AMENDED AND RESTATED 1992 STOCK OPTION PLAN

                                    RECITALS

     A Express  Scripts,  Inc. (the  "Corporation")  has an Amended and Restated
1992 Stock  Option Plan (the "1992  Plan"),  which was  amended and  restated on
March 22, 1995 and approved by the stockholders on May 24, 1995.

     B. On March 24, 1999,  the Board of Directors of the  Corporation  approved
certain amendments to the 1992 Plan (the "First Amendment").

     C. On March 24, 1999, the Board approved certain  additional  amendments to
the 1992 Plan  pursuant to the  Employment  Agreement  dated as of April 1, 1999
between the Corporation and Barrett A. Toan.

                                    AMENDMENT

     1. DEFINITIONS. Capitalized terms set forth in this Second Amendment to the
1992 Plan (the "Second Amendment") shall be as defined in the 1992 Plan.

     2.  AMENDMENT  TO  SECTION  1,  DEFINITION  OF  "CHANGE  IN  CONTROL".  The
definition  of the term  "Change  in  Control"  in Section 1 of the 1992 Plan is
hereby amended by adding the following sentence to the end of such definition:

     Notwithstanding anything to the contrary herein, "Change in Control" or any
other  substantially  similar term that is defined in the  Employment  Agreement
shall have the meaning given such term in the  Employment  Agreement in order to
give effect to the provisions of such Agreement.

     3.  AMENDMENT  TO SECTION 1,  DEFINITION  OF  "EMPLOYMENT  AGREEMENT".  The
definition  of the term  "Employment  Agreement" is hereby added to Section 1 of
the 1992 Plan as set forth below:

     "Employment   Agreement"  shall  mean  that  certain  employment  agreement
effective as of April 1, 1999 between Barrett A. Toan and Express Scripts, Inc.,
as such agreement may be amended from time to time.

     4. AMENDMENT TO SECTION 4.2. Section 4.2 of the 1992 Plan is hereby amended
by adding a new Section 4.2(e) as set forth below:

     (e)  EMPLOYMENT  AGREEMENT.  To the extent that the  provisions  of Section
4.2(c), Section 4.2(d) or any Option Agreement evidencing outstanding Options or
Restricted Shares conflict with any provisions of the Employment Agreement,  the
Employment  Agreement shall govern as to Options granted,  and Restricted Shares
issued, to the employee named therein.

     5. AMENDMENT TO SECTION 5.1. Section 5.1 of the 1992 Plan is hereby amended
by deleting  such section in its entirety and replacing it with the language set
forth below:

     5.1 IMPACT OF CHANGE OF CONTROL EVENT

     Except as otherwise  provided in the  Employment  Agreement with respect to
Options granted, and Restricted Shares issued, to the employee named therein and
notwithstanding any other provision of the Plan to the contrary, in the event of
a Change in Control  (i) all  outstanding  Options,  whether  or not  previously
exercisable and vested, shall terminate  immediately and become null and void on
the Change in Control Date, and (ii) any Restricted  Shares shall be redeemed by
the Company and  canceled as of the Change in Control  Date;  and in either case
the Company shall pay such Optionee the amount, if any, determined in accordance
with Section 5.2 in lieu of such Options or Restricted Shares.

     6. AMENDMENT TO SECTION 5.4. Section 5.4 of the 1992 Plan is hereby amended
by adding to the end of such Section the sentence set forth below:

     To the  extent  that  the  provisions  of this  Section  5.4 or any  Option
Agreement evidencing  outstanding Options or Restricted Shares conflict with any
provisions of the Employment Agreement, the Employment Agreement shall govern as
to Options granted, and Restricted Shares issued, to the employee named therein.

     7.  AMENDMENT  TO  GRANDFATHER  CLAUSE.  The  grandfather   provision  that
immediately  follows  Section 7.7 of the 1992 Plan is hereby amended by deleting
the  italicized  lead-in  thereto and  replacing  it with the language set forth
below:

     PRIOR TO  AMENDMENT  AND  RESTATEMENT,  SECTION 5, WHICH WILL  CONTINUE  TO
GOVERN  CURRENTLY  OUTSTANDING  AWARDS OF STOCK  OPTIONS AND  RESTRICTED  SHARES
(EXCEPT AS TO OPTIONS AND  RESTRICTED  SHARES HELD BY THE EMPLOYEE  NAMED IN THE
EMPLOYMENT AGREEMENT), FORMERLY PROVIDED AS FOLLOWS:

     8.  EFFECTIVE  DATE OF THE  SECOND  AMENDMENT;  STOCKHOLDER  APPROVAL.  The
effective  date of this Second  Amendment  shall be March 24, 1999.  This Second
Amendment  shall  be  submitted  for the  approval  of the  stockholders  of the
Corporation  at  the  next  annual  meeting  thereof  on  May  26,  1999  or any
adjournment  thereof,  and,  if not  approved by the  stockholders,  this Second
Amendment shall be null and void.

<PAGE>
                                   APPENDIX III

                              EXPRESS SCRIPTS, INC.
                   AMENDED AND RESTATED 1992 STOCK OPTION PLAN
                              FOR OUTSIDE DIRECTORS


1.       PURPOSE; DEFINITIONS.

     The purpose of the Plan is to increase the  proprietary and vested interest
of the  Non-Employee  Directors of the Company in the growth and  performance of
the Company by granting them Options.

     Whenever  the  following  terms are used in the Plan,  they  shall have the
meaning specified below unless the context clearly indicates to the contrary.

     "Board" shall mean the Board of Directors of the Company.

     "Change in Control" shall mean the following:

     (i) the first date on which both of the following  conditions  shall exist:
(A) New York Life Insurance  Company ("New York Life") shall have ceased to be a
Parent,  and (B) a "person" (as such term is used in Section  13(d) and 14(d) of
the Exchange Act), other than the Company or a Related Entity is the "beneficial
owner"  (as  defined  in  Rule  13d-3  under  the  Exchange  Act),  directly  or
indirectly,  of  securities of the Company  representing  fifty percent (50%) or
more of the combined voting power for the election of directors of the Company's
then outstanding securities;

     (ii) the shareholders of the Company approve a plan of complete liquidation
of the Company; or

     (iii) the  shareholders of the Company approve an agreement for the sale or
disposition by the Company of all or  substantially  all of the Company's assets
or any transaction having a similar effect.

     "Change in Control  Date"  shall  mean,  in the case of a Change in Control
defined in clause (i) or (ii) of the definition  thereof,  the date on which the
event occurs,  and in the case of a Change in Control defined in clause (iii) of
the definition thereof, the date on which the transaction closes.

     "Change in Control Price" shall mean, in a Change in Control transaction in
connection with which New York Life receives  consideration  for the transfer or
cancellation of its voting securities, the per share amount received by New York
Life; and in the case of any other Change in Control transaction, the greater of
the highest Fair Market Value or the highest price per share paid in a bona fide
transaction  related to such  Change in  Control at any time  during the 60 days
immediately preceding the Change in Control Date.

     "Code" shall mean the Internal  Revenue Code of 1986,  as amended from time
to time.

     "Company" shall mean Express Scripts, Inc., a Delaware corporation, and any
successor corporation.

     "Effective Date" shall have the meaning set forth in Section 7.1.

     "Exchange Act" shall mean the Securities Exchange Act of 1934, as amended.

     "Fair Market Value" per Share as of a particular date shall mean:

     (i) the closing sales price per Share on a national securities exchange for
the last preceding date on which there was a sale of Shares on such exchange;

     (ii) if clause  (i) does not apply and the  Shares  are then  quoted on the
National  Association of Securities Dealers Automated Quotation system (known as
"NASDAQ"),  the closing  price per Share as reported on such system for the last
preceding date on which a sale was reported;

     (iii) if clause (i) or (ii) does not apply and the  Shares are then  traded
on an  over-the-counter  market, the average of the closing bid and asked prices
for the Shares in such  over-the-counter  market for the last  preceding date on
which such bid and asked prices were quoted; or

     (iv) if the Shares are not then listed on a national securities exchange or
traded in an over-the-counter  market, such value as the Board in its discretion
may determine.  "Non-Employee Director" shall mean a director of the Company who
is not an employee of the Company,  a Parent or a Subsidiary and has not, within
one year immediately preceding the determination of such director's eligibility,
received any award under any plan of the Company,  a Parent or a Subsidiary that
entitles  the  participants  therein to acquire  stock,  stock  options or stock
appreciation  rights of any such company  (other than any other plan under which
participants'  entitlements are governed by provisions  meeting the requirements
of Rule 16b-3(c)(2)(ii) promulgated under the Exchange Act).

     "Option" shall mean an option to purchase  Shares  granted  pursuant to the
Plan.  Options  granted under the Plan are not intended to be  "incentive  stock
options" within the meaning of Section 422 of the Code.

     "Option  Agreement"  shall  mean an Option  Agreement  to be  entered  into
between  the  Company  and an  Optionee,  which  shall  set  forth the terms and
conditions of the Options granted to such Optionee,  and shall be  substantially
in the form attached hereto as Exhibit A.

     "Optionee"  shall mean a  Non-Employee  Director to whom an Option has been
granted pursuant to the Plan.

     "Parent" shall mean any corporation (other than the Company) in an unbroken
chain of corporations ending with the Company if each of the corporations (other
than the Company), or if each group of commonly controlled corporations, then is
the  "beneficial  owner"  (as  defined in Rule 13d-3  under the  Exchange  Act),
directly or indirectly,  of securities in one or more of the other  corporations
in such chain  representing  fifty percent (50%) or more of the combined  voting
power for the election of directors for such corporation.

     "Payment  Date"  shall  mean a date not later than ten (10)  business  days
following the Change in Control Date.

     "Plan" shall mean this  Express  Scripts,  Inc.  1992 Stock Option Plan for
Outside Directors, as hereinafter amended from time to time.

     "Related  Entity" shall mean a Parent, a Subsidiary or any employee benefit
plan (including a trust forming a part of such Plan)  maintained by the Company,
a Parent or a Subsidiary.

     "Securities Act" shall mean the Securities Act of 1933, as amended.

     "Share" shall mean a share of the Company's  Class A Common Stock,  .01 par
value.

     "Subsidiary"   shall  mean  any   corporation   in  an  unbroken  chain  of
corporations  beginning with the Company,  if each such corporation  (other than
the last  corporation  in the  unbroken  chain),  or if each  group of  commonly
controlled  corporations,  then owns  fifty  percent  (50%) or more of the total
combined voting power in one of the other corporations in such chain.

2.       SHARES SUBJECT TO THE PLAN

     2.1 SHARES SUBJECT TO PLAN

     The maximum number of Shares that may be issued or transferred  pursuant to
Options  under this Plan shall be 98,000.  The Company shall reserve such number
of Shares for the  purposes  of the Plan,  out of its  authorized  but  unissued
Shares or out of Shares held in the Company's  treasury,  or partly out of each.
If any Shares that have been subject to an Option  cease to be subject  thereto,
such Shares may again be the subject of Options hereunder.

     2.2 CHANGES IN COMPANY'S SHARES

     In the event that the  outstanding  Shares are  hereafter  changed  into or
exchanged  for a different  number or kind of shares or other  securities of the
Company, or of another corporation, by reason of reorganization, merger or other
subdivision,  consolidation,  recapitalization,  reclassification,  stock split,
issuance of warrants or rights, stock dividend, combination of shares or similar
event, appropriate adjustments shall be made by the Board in the number and kind
of Shares  subject to and which may be subject to Options  under this Plan,  and
the purchase price per Share, to prevent dilution or enlargement of the benefits
granted  to,  or  available  for,  Optionees,   including   adjustments  of  the
limitations in Section 2.1 of the maximum number and kind of shares which may be
issued hereunder as Shares.

3.       ELIGIBILITY FOR OPTION GRANTS

     Each individual who is a Non-Employee  Director on the Effective Date shall
receive an Option to purchase  14,000  Shares as of such date.  Thereafter,  any
other  individual  who is elected or  appointed  to the office of  director as a
Non-Employee  Director  after the  Effective  Date,  shall  receive an Option to
purchase  14,000  Shares as of the date of the first  meeting of the Board which
such individual attends in such capacity.

4.       TERMS OF OPTIONS AND SHARES

     4.1 OPTION AGREEMENT

     Options shall be granted only pursuant to an Option Agreement,  which shall
be executed by the Optionee and an  authorized  officer of the Company and which
shall contain such terms and conditions as the Board shall determine, consistent
with the Plan.

     4.2 TERMS

     The  Options   granted   hereunder  shall  have  the  following  terms  and
conditions:

     (a) PRICE.  The purchase price for the Shares subject to an Option shall be
one hundred  percent  (100%) of the Fair Market  Value of a Share as of the date
the Option is granted.

     (b) TERM. The term of an Option shall be ten years from the date that it is
granted.

     (c) VESTING.  Subject to the provisions of Section 4.2(d) and Section 5, an
Option shall become  exercisable in installments on a cumulative basis at a rate
of one-third (1/3) each year,  beginning on the first anniversary of the date of
grant, until the date such Option expires or is terminated.

     (d) TERMINATION OF SERVICE AS NON-EMPLOYEE DIRECTOR.  Except as provided in
this Section  4.2(d),  all  outstanding  Options  held by an Optionee  terminate
immediately  if such  individual  ceases to be a  Non-Employee  Director for any
reason other than death or total disability,  provided that, if the Optionee has
attained age sixty-five (65) at the time of such  cessation,  the portion of his
outstanding  Options  that  have  not  become  exercisable  as of  such  date in
accordance  with Section 4.2(c) shall terminate  immediately,  and the remaining
portion, if any, shall remain exercisable for a period of three months following
such cessation,  and shall thereafter  terminate.  If an Optionee ceases to be a
Non-Employee  Director  due to his death or total  disability,  all  outstanding
Options held by such Optionee shall immediately  become fully exercisable to the
extent not so exercisable, shall remain exercisable for a period of three months
following such cessation,  and shall thereafter  terminate.  Notwithstanding the
foregoing,  no provision in this Section 4.3(d) shall extend the exercise period
of an Option  beyond  its  original  term.  All  determinations  as to whether a
Non-Employee  Director has become  totally  disabled  shall be made by the Board
upon the basis of such evidence as it deems necessary or desirable, and shall be
final and binding on all interested persons.

     4.3 NON-TRANSFERABILITY

     No Option granted under the Plan shall be  transferable  by the Optionee to
whom granted otherwise than by will or the laws of descent and distribution, and
an Option may be  exercised  during the  lifetime of such  Optionee  only by the
Optionee or his guardian or legal representative. The terms of such Option shall
be  binding  upon  the  beneficiaries,   executors,  administrators,  heirs  and
successors of the Optionee.

     4.4 METHOD OF EXERCISE

     The exercise of an Option shall be made only by a written notice  delivered
in person or by mail to the Secretary of the Company at the Company's  principal
executive  office,   specifying  the  number  of  Shares  to  be  purchased  and
accompanied by full payment therefor and otherwise in accordance with the Option
Agreement  pursuant to which the Option was granted.  The purchase price for any
Shares  purchased  pursuant to the  exercise of an Option  shall be paid in full
upon such exercise in cash, by check or, at the discretion of the Board and upon
such terms and conditions as the Board shall approve, by transferring previously
owned Shares to the Company,  having Shares withheld or exercising pursuant to a
"cashless  exercise"   procedure,   or  any  combination   thereof.  Any  Shares
transferred  to the  Company as payment of the  purchase  price  under an Option
shall be valued at their  Fair  Market  Value on the day  preceding  the date of
exercise of such Option.  If requested by the Board,  the Optionee shall deliver
the Option  Agreement  evidencing the Option to the Secretary of the Company who
shall  endorse  thereon a  notation  of such  exercise  and return  such  Option
Agreement  to the  Optionee.  Not less  than one  hundred  (100)  Shares  may be
purchased at any time upon the exercise of an Option unless the number of Shares
so purchased  constitutes the total number of Shares then purchasable  under the
Option or the Board determines otherwise in its sole discretion.

     4.5 RIGHTS AS STOCKHOLDER

     No Optionee shall be deemed for any purpose to be or to have the rights and
privileges of the owner of any Shares subject to any Option unless and until (a)
the Option shall have been exercised pursuant to the terms thereof,  and (b) the
Company shall have issued the Shares to the Optionee.

5.       CHANGE IN CONTROL PROVISIONS

     Notwithstanding  anything herein to the contrary,  in the event of a Change
in Control, all outstanding options,  whether or not previously  exercisable and
vested,  shall  terminate  immediately and become null and void on the Change in
Control  Date,  and the Company  shall pay such  Optionee an amount equal to the
excess,  if any, of the Change in Control Price over the purchase  price for the
shares subject to the option, in cash on the Payment Date.

6.       ADMINISTRATION

     The Plan shall be administered  by the Board.  Subject to the provisions of
the Plan,  the Board shall be  authorized  to interpret  the Plan, to establish,
amend,  and rescind any rules and  regulations  relating to the Plan and to make
all other  determinations  necessary or advisable for the  administration of the
Plan; provided, however, that the Board shall have no discretion with respect to
the  selection  of directors to receive  Options  under the Plan,  the number of
Shares subject to any such Options,  the purchase price thereunder or the timing
of grants of  Options  under the Plan.  The  determinations  of the Board in the
administration of the Plan, as described herein,  shall be final and conclusive.
The Secretary  shall be authorized to implement the Plan in accordance  with its
terms and to take such actions of a ministerial  nature as shall be necessary to
effectuate the intent and purposes thereof.

7.       OTHER PROVISIONS

     7.1 EFFECTIVE DATE

     (a) EFFECTIVE  DATE. The Plan shall become  effective as of the date of the
closing of the sale by the Company of shares of Common  Stock to the public (the
"Effective Date") and shall continue in effect until March 31, 2002 or until the
Change in Control Date, whichever is sooner;  provided,  that termination of the
Plan shall not affect the right of any Optionee with respect to options  granted
prior to such  termination.  Notwithstanding  anything  herein or in any  Option
Agreement to the contrary,  Options granted hereunder shall not vest and may not
be exercised  prior to the Effective  Date, and, in the event that the Effective
Date  has not  occurred  on or prior to July 1,  1992  (or  such  later  date as
determined by the Board in its sole  discretion),  all Options  granted prior to
such date  shall be null and void and of no effect,  retroactive  to the date of
grant, and the Plan shall be null and void and of no effect,  retroactive to the
date of Board approval.

     (b) EFFECT OF CERTAIN  AMENDMENTS.  The amendments approved by the Board of
Directors  on March 22, 1995,  shall be  effective  only with respect to Options
granted after such date.

     7.2 AMENDMENT, SUSPENSION OR TERMINATION OF THE PLAN

     The  Plan  may be  wholly  or  partially  amended  or  otherwise  modified,
suspended or terminated at any time or from time to time by the Board; provided,
however,  that,  except as  provided  in  Section  2.2,  no  amendment  shall be
effective  unless  approved by the  affirmative  vote of a majority of the votes
eligible  to be cast at a meeting of  stockholders  of the  Company  held within
twelve  (12)  months  of the date of  adoption  of such  amendment,  where  such
amendment  will:  (a) increase  the number of Shares as to which  Options may be
granted under the Plan, either individually or in the aggregate;

     (b) change in any respect the class of persons who constitute  Non-Employee
Directors eligible to participate in the Plan;

     (c) change the  requirement  of Section 4.2(a) that the Option be priced at
Fair Market Value;

     (d) extend the maximum period for granting or exercising  Options  provided
herein; or

     (e) otherwise  materially increase the benefits accruing to Optionees under
the Plan.  The  provisions of Sections 3 and 4 may not be amended more than once
every six months,  other than to comport with changes in the Code,  the Employee
Retirement Income Security Act of 1974, as amended,  or the rules or regulations
promulgated under either statute.

     From and after the Effective  Date,  neither the amendment,  suspension nor
termination  of the Plan shall,  without the consent of the  Optionee,  alter or
impair  any  rights or  obligations  under any Option  theretofore  granted.  No
Options may be granted during any period of suspension nor after  termination or
expiration of the Plan.

     7.3 REGULATIONS AND OTHER APPROVALS; GOVERNING LAW

     (a) The Plan and the  rights of all  persons  claiming  hereunder  shall be
construed and  determined  in accordance  with the laws of the State of Delaware
without giving effect to the choice of law principles thereof.

     (b) The obligation of the Company to sell or deliver Shares with respect to
Options  granted under the Plan shall be subject to all applicable  laws,  rules
and regulations, including all applicable federal and state securities laws, and
the obtaining of all such  approvals by  governmental  agencies as may be deemed
necessary or appropriate by the Board.

     (c) The Board may make such changes as may be necessary or  appropriate  to
comply with the rules and regulations of any government authority.

     (d) Each  Option is subject  to the  requirement  that,  if at any time the
Board  determines,  in its sole  discretion,  that the listing,  registration or
qualification  of  Shares  issuable  pursuant  to the  Plan is  required  by any
securities  exchange  or under any  state or  federal  law,  or the  consent  or
approval of any  governmental  regulatory  body is  necessary  or desirable as a
condition of, or in connection  with,  the grant of an Option or the issuance of
Shares,  no Options shall be granted or payment made or Shares issued,  in whole
or in part, unless listing, registration, qualification, consent or approval has
been effected or obtained free of any conditions as acceptable to the Board.

     (e) In the event that the  disposition of Shares  acquired  pursuant to the
Plan  is  not  covered  by a  then  current  registration  statement  under  the
Securities Act, and is not otherwise exempt from such registration,  such Shares
shall be restricted  against  transfer to the extent  required by the Securities
Act or  regulations  thereunder,  and  the  Board  may  require  any  individual
receiving  Shares  pursuant to the Plan, as a condition  precedent to receipt of
such Shares,  to represent to the Company in writing that the Shares acquired by
such  individual  are  acquired  for  investment  only  and  not  with a view to
distribution.  the  certificate for such shall include any legend that the Board
deems appropriate to reflect any restrictions on transfer.

     7.4 TITLES; CONSTRUCTION

     Titles are provided herein for  convenience  only and are not to serve as a
basis for  interpretation  or  construction  of the Plan. The masculine  pronoun
shall include the feminine and neuter and the singular shall include the plural,
when the context so indicates.

     PRIOR TO  AMENDMENT  AND  RESTATEMENT,  SECTION 5, WHICH WILL  CONTINUE  TO
GOVERN  CURRENTLY  OUTSTANDING  AWARDS OF STOCK OPTIONS AND  RESTRICTED  SHARES,
FORMERLY PROVIDED AS FOLLOWS:

5.       CHANGE IN CONTROL PROVISIONS

     In the  event of a Change  in  Control,  (a) all  outstanding  Options  not
previously exercisable and vested shall immediately become fully exercisable and
vested, and (b) the  transferability and forfeiture  restrictions  applicable to
any  Restricted  Shares to the extent not  already  lapsed,  shall  lapse and no
longer be applicable,  and such Shares shall be deemed fully vested and owned by
the Optionee.

     "Change in  Control"  shall  mean the  occurrence  of any of the  following
events at a time when New York Life  Insurance  Company,  A New York mutual life
insurance company, or any successor thereto is not a Parent:

     (i) any  "person,"  as such term is used in Section  13(d) and 14(d) of the
Exchange Act, (other than the Company or a Related Entity,  without the approval
of the Board, becomes the "beneficial owner" (as defined in Rule 13d-3 under the
Exchange Act), directly or indirectly, of securities of the Company representing
fifty  percent  (50%) or more of the  combined  voting power for the election of
directors of the Company's then outstanding securities;

     (ii) during any period of two  consecutive  years beginning on or after the
effective  date of the Plan,  individuals  who at the  beginning  of such period
constitute the Board, and any new directors (other than a director designated by
a person  who has  entered  into an  agreement  with  the  Company  to  effect a
transaction  described in clause (i), (iii) or (iv)) whose election by the Board
or nomination for election by the Company's  shareholders was approved by a vote
of at least  two-thirds  (2/3) of the directors  then still in office who either
were  directors at the  beginning of the period or whose  election or nomination
for election was previously so approved  (unless the approval of the election or
nomination  for election of such new directors was in connection  with an actual
or threatened election or proxy contest),  cease for any reason to constitute at
least a majority thereof;

     (iii) the  shareholders of the Company approve a merger or consolidation of
the Company with any other corporation, other than (x) a merger or consolidation
which  would  result  in  the  voting  securities  of  the  Company  outstanding
immediately   prior  thereto   continuing  to  represent  (either  by  remaining
outstanding  or by being  converted  into  voting  securities  of the  surviving
entity)  more than eighty  percent  (80%) of the  combined  voting  power of the
voting   securities  of  the  Company  or  such  surviving  entity   outstanding
immediately  after such merger or consolidation or (y) a merger or consolidation
effected to implement a recapitalization of the Company (or similar transaction)
in which no "person" (as defined  above in clause (i))  acquires more than fifty
percent (50%) of the combined  voting power for the election of directors of the
Company's then outstanding securities; or

     (iv) the shareholders of the Company approve a plan of complete liquidation
of the Company or an agreement for the sale or disposition by the Company of all
or substantially all of the Company's assets or any transaction having a similar
effect.

<PAGE>

                               FIRST AMENDMENT TO
                              EXPRESS SCRIPTS, INC.
                   AMENDED AND RESTATED 1992 STOCK OPTION PLAN
                              FOR OUTSIDE DIRECTORS

                                    RECITALS

     1. Express  Scripts,  Inc. (the "Company") has an Amended and Restated 1992
Stock  Option  Plan for Outside  Directors  (the  "Plan")  which was amended and
restated on March 22, 1995 and approved by the stockholders on May 24, 1995.

     2. On January 24, 1996,  based on the  recommendation  of the  Compensation
Committee  of the Board of Directors  of the Company  (the  "Board"),  the Board
approved  an increase in the number of stock  options  granted to the  Company's
outside directors.

                                    AMENDMENT

     1. DEFINITIONS.  Capitalized terms set forth in this First Amendment to the
Plan (the "First Amendment") shall be as defined in the Plan.

     2.  AMENDMENT TO SECTION 2.1,  SHARES  SUBJECT TO PLAN.  Section 2.1 of the
Plan is amended by deleting the figure  "98,000" in the first  sentence  thereof
and inserting in lieu thereof the figure "192,000."

     3. AMENDMENT TO SECTION 3, ELIGIBILITY FOR OPTION GRANTS.  Section 3 of the
Plan is hereby amended by deleting such section in its entirety and replacing it
with the language set forth below:

     Each individual who is first elected or appointed to the office of director
as a  Non-Employee  Director  on or  after  the  effective  date of  this  First
Amendment  shall  receive an Option to purchase  24,000 Shares as of the date of
the first meeting of the Board which such  individual  attends in such capacity.
In addition, each individual who was first elected or appointed to the office of
director as a  Non-Employee  Director  prior to the effective date of this First
Amendment (as  hereinafter  defined) and is still serving in such capacity shall
receive an Option to purchase  10,000  Shares as of the  effective  date of this
First Amendment, such Option to be in addition to any Options previously granted
to such Non-Employee Director.

     4. AMENDMENT TO SECTION 4.2(C),  VESTING.  Subsection 4.2(c) of the Plan is
hereby amended by deleting much subsection in its entirety and replacing it with
the language set forth below:

     (c)  VESTING.  Subject to  provisions  of Section 4.2 (d) and Section 5, an
Option shall become  exercisable in installments on a cumulative basis at a rate
of one-fifth (1/5) each year,  beginning on the first anniversary of the date of
grant, until the date such Option expires or is terminated;  provided,  HOWEVER,
that  additional  Options  for  10,000  shares  granted  pursuant  to the second
sentence of Section 3 hereof shall be vested in two installments of 5,000 Shares
each on June 16, 1996, and on June 16, 1997.

     5.  EFFECTIVE  DATE  OF THE  FIRST  AMENDMENT;  SHAREHOLDER  APPROVAL.  The
effective  date of this First  Amendment  shall be January 24, 1996.  This First
Amendment  shall  be  submitted  for the  approval  of the  shareholders  of the
Corporation  at the next  annual  meeting  thereof on May 22,  1996,  and if not
approved  by the  shareholders  this First  Amendment  and any  options  granted
pursuant hereto prior to such approval shall be null and void.

<PAGE>
                               SECOND AMENDMENT TO
        EXPRESS SCRIPTS, INC. AMENDED AND RESTATED 1992 STOCK OPTION PLAN
                              FOR OUTSIDE DIRECTORS

                                    RECITALS

     A. Express  Scripts,  Inc. (the "Company") has an Amended and Restated 1992
Stock  Option Plan for Outside  Directors  (the  "Plan"),  which was amended and
restated on March 22, 1995 and approved by the stockholders on May 24, 1995, and
further amended on January 24, 1996 and approved by the  stockholders on May 22,
1996.

     B. On January 27, 1999,  based on the  recommendation  of the  Compensation
Committee  of the Board of Directors  of the Company  (the  "Board"),  the Board
approved  additional  awards  of  stock  options  to be  granted  to each of the
Company's outside directors.

                                    AMENDMENT

     1. DEFINITIONS. Capitalized terms set forth in this Second Amendment to the
Plan (the "Second Amendment") shall be as defined in the Plan.

     2.  AMENDMENT TO SECTION 2.1,  SHARES  SUBJECT TO PLAN.  Section 2.1 of the
Plan is amended by deleting the phrase  "192,000  Shares" in the first  sentence
thereof and inserting in lieu thereof the figure  "384,000  Shares",  to reflect
the stock split effected on October 30, 1998.

     3. AMENDMENT TO SECTION 3, ELIGIBILITY FOR OPTION GRANTS.  Section 3 of the
Plan is hereby amended by deleting such section in its entirety and replacing it
with the language set forth below:

     (a)  Each  individual  who  was a  Non-Employee  Director  on the  original
Effective  Date of this Plan  received an Option to purchase  28,000  Shares (as
adjusted  to reflect the stock  split  effected on October 30,  1998) as of such
date;

     (b) Each  individual  who was first  elected or  appointed to the office of
director as a  Non-Employee  Director  prior to the effective  date of the First
Amendment to this Plan and was still  serving in such  capacity on the effective
date of said First  Amendment  received an Option to purchase  20,000 Shares (as
adjusted  to reflect the stock split  effected on October 30,  1998),  as of the
effective  date of the  First  Amendment  to this  Plan  (the  "First  Amendment
Additional Options"),  such First Amendment Additional Options being in addition
to any Options previously granted to such Non-Employee Director;

     (c) Each  individual  who is first  elected or  appointed  to the office of
director as a Non-Employee  Director on or after the effective date of the First
Amendment  to the Plan shall  receive an Option to  purchase  48,000  Shares (as
adjusted  to reflect the stock split  effected on October 30,  1998),  as of the
date of the first  meeting of the Board  which such  individual  attends in such
capacity; and

     (d) Each  individual  who was first  elected or  appointed to the office of
director as a  Non-Employee  Director  prior to the effective date of the Second
Amendment and is still  serving in such  capacity on the effective  date of said
Second  Amendment  shall  receive an Option to purchase  2,500  Shares as of the
effective  date of said  Second  Amendment  (the  "Second  Amendment  Additional
Options"),  such Second  Amendment  Additional  Options to be in addition to any
Options previously granted to such Non-Employee Director.

     4. AMENDMENT TO SECTION 4.2(C),  VESTING.  Subsection 4.2(c) of the Plan is
hereby amended by deleting such subsection in its entirety and replacing it with
the language set forth below:

     (c)  VESTING.  Subject to  provisions  of Section 4.2 (d) and Section 5, an
Option shall become  exercisable in installments on a cumulative basis at a rate
of one-fifth (1/5) each year,  beginning on the first anniversary of the date of
grant, until the date such Option expires or is terminated;  PROVIDED,  HOWEVER,
that:

     (i)  the  First  Amendment  Additional  Options  shall  be  vested  in  two
installments of 10,000 Shares each on June 16, 1996, and on June 16, 1997; and

     (ii)  the  Second  Amendment   Additional   Options  shall  vest  in  three
installments  of 833,  833 and 834 on January  27,  2000,  January  27, 2001 and
January 27, 2002, respectively.

     5.  EFFECTIVE  DATE OF THE  SECOND  AMENDMENT;  STOCKHOLDER  APPROVAL.  The
effective date of this Second  Amendment  shall be January 27, 1999. This Second
Amendment  shall  be  submitted  for the  approval  of the  stockholders  of the
Corporation  at the next  annual  meeting  thereof on May 26,  1999,  and if not
approved by the  stockholders  this Second  Amendment  and any Second  Amendment
Additional  Options granted pursuant hereto prior to such approval shall be null
and void.



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