SEI CORP
DEF 14A, 1998-04-24
SECURITY BROKERS, DEALERS & FLOTATION COMPANIES
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<PAGE>
 
                           SCHEDULE 14A INFORMATION

PROXY STATEMENT PURSUANT TO SECTION 14(A) OF THE SECURITIES EXCHANGE ACT OF 1934

Filed by the Registrant [X]

Filed by a Party other than the Registrant [_]


Check the appropriate box:

[_] Preliminary Proxy Statement            [_] CONFIDENTIAL, FOR USE OF THE
                                               COMMISSION ONLY (AS PERMITTED BY
[X] Definitive Proxy Statement                 RULE 14A-6(E)(2))

[_] Definitive Additional Materials

[_] Soliciting Material Pursuant to (S)240.14a-11(c) or (S)240.14a-12


                            SEI Investments Company
   ------------------------------------------------------------------------
               (Name of Registrant as Specified In Its Charter)

                                      N/A
   ------------------------------------------------------------------------  
   (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)(4) 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 From 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>
 







SEI
  Investments Notice of Annual Meeting
                       of Shareholders to be held May 21, 1998



<PAGE>
 
                         SEI INVESTMENTS COMPANY
                         Oaks, PA 19456-1100
 
                         NOTICE OF ANNUAL MEETING OF SHAREHOLDERS
                         TO BE HELD MAY 21, 1998
 
                         The Annual Meeting of Shareholders of SEI Investments
                         Company (the "Company"), a Pennsylvania business
                         corporation, will be held at 10:00 a.m., local time,
                         Thursday, May 21, 1998, at One Freedom Valley Drive,
                         Oaks, PA 19456-1100 for the following purposes:
 
                       1. To elect two directors for a term expiring at the
                          2001 Annual Meeting;
 
                       2. To consider approval of the SEI Investments Company
                          1998 Equity Compensation Plan;
 
                       3. To consider approval of the SEI Investments Company
                          Employee Stock Purchase Plan, as amended and
                          restated;
 
                       4. To ratify the selection of Arthur Andersen LLP as
                          the Company's auditors for 1998; and
 
                       5. To transact such other business as may properly come
                          before the Annual Meeting or any adjournments
                          thereof.
 
                         Only shareholders of record at the close of business
                         on April 7, 1998 will be entitled to notice of, and
                         to vote at, the Annual Meeting and at any
                         adjournments thereof.
 
                         By order of the Board of Directors,
 
                         William M. Doran
                         Secretary
                         April 24, 1998
 
                         YOUR VOTE IS IMPORTANT. ACCORDINGLY, YOU ARE ASKED TO
                         COMPLETE, SIGN, AND RETURN THE ACCOMPANYING PROXY
                         CARD IN THE ENVELOPE PROVIDED, WHICH REQUIRES NO
                         POSTAGE IF MAILED IN THE UNITED STATES.
<PAGE>
 
                         SEI INVESTMENTS COMPANY
                         Oaks, PA 19456-1100
 
                         PROXY STATEMENT
 
                         1998 ANNUAL MEETING OF SHAREHOLDERS
 
                         This Proxy Statement is furnished in connection with
                         the solicitation by the Board of Directors of SEI
                         Investments Company (the "Company") of proxies for
                         use at the 1998 Annual Meeting of Shareholders of the
                         Company to be held on May 21, 1998 (the "1998 Annual
                         Meeting") and at any adjournments thereof. Action
                         will be taken at the meeting upon the election of two
                         directors, approval of the SEI Investments Company
                         1998 Equity Compensation Plan, approval of the SEI
                         Investments Company Employee Stock Purchase Plan, as
                         amended and restated, ratification of the selection
                         of Arthur Andersen LLP as the Company's auditors for
                         1998, and such other business as may properly come
                         before the meeting and any adjournments thereof. This
                         Proxy Statement, the accompanying proxy card, and the
                         Company's Annual Report for 1997 will first be sent
                         to the Company's shareholders on or about April 24,
                         1998.
 
                         VOTING AT THE MEETING
 
                         Only the holders of the Company's Common Stock, par
                         value $.01 per share ("Shares"), of record at the
                         close of business on April 7, 1998 are entitled to
                         vote at the 1998 Annual Meeting. On that date there
                         were 17,813,363 Shares outstanding and entitled to be
                         voted at the meeting. Each holder of Shares entitled
                         to vote will have the right to one vote for each
                         Share outstanding in his or her name on the books of
                         the Company. See "Ownership of Shares" for
                         information regarding the ownership of Shares by
                         directors, nominees, officers, and certain
                         shareholders of the Company.
                            The Shares represented by each properly executed
                         proxy card will be voted in the manner specified by
                         the shareholder. If instructions to the contrary are
                         not given, such Shares will be voted FOR the election
                         to the Board of Directors of the nominees listed
                         herein, FOR approval of the
 
1
<PAGE>
 
                         SEI Investments Company 1998 Equity Compensation
                         Plan, FOR the approval of the SEI Investments Company
                         Employee Stock Purchase Plan, as amended and
                         restated, and FOR ratification of the selection of
                         Arthur Andersen LLP as the Company's auditors for
                         1998. If any other matters are properly presented to
                         the meeting for action, the proxy holders will vote
                         the proxies (which confer discretionary authority to
                         vote on such matters) in accordance with their best
                         judgment.
                            Execution of the accompanying proxy card will not
                         affect a shareholder's right to attend the 1998
                         Annual Meeting and vote in person. Any shareholder
                         giving a proxy has the right to revoke it by giving
                         written notice of revocation to the Secretary of the
                         Company at any time before the proxy is voted. Under
                         the Pennsylvania Business Corporation Law, if a
                         shareholder (including a nominee, broker, or other
                         record owner) records the fact of abstention or fails
                         to vote (including broker non-votes) either in person
                         or by proxy, such action is not considered a vote
                         cast and will have no effect on the election of
                         directors or voting upon Proposals two, three or
                         four, but will be considered present for purposes of
                         determining a quorum.
 
      (Proposal No. 1)   ELECTION OF DIRECTORS
 
                         The Board of Directors of the Company currently
                         consists of six members and is divided into three
                         classes, one class being comprised of three
                         directors, one class being comprised of two directors
                         and one class currently comprised of one director and
                         one vacancy due to the death of a director. One class
                         is elected each year to hold office for a three-year
                         term and until successors of such class are duly
                         elected and qualified, except in the event of death,
                         resignation, or removal. Subject to shareholder
                         approval at this meeting, two directors will be
                         elected for the current class. This class will be
                         elected at the 1998 Annual Meeting by a plurality of
                         votes cast at the meeting.
                            Messrs. West and Doran, both of whom are current
                         members of the Board of Directors, have been
                         nominated by the Board of Directors for election as
                         directors at the 1998 Annual Meeting. Shares
                         represented by
 
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<PAGE>
 
                         properly executed proxy cards in the accompanying
                         form will be voted for such nominees in the absence
                         of instructions to the contrary. The nominees have
                         consented to be named and to serve if elected. The
                         Company does not know of anything that would preclude
                         the nominees from serving if elected. If, for any
                         reason, a nominee should become unable or unwilling
                         to stand for election as a director, either the
                         Shares represented by all proxies authorizing votes
                         for such nominee will be voted for the election of
                         such other person as the Board of Directors may
                         recommend or the number of directors to be elected at
                         the 1998 Annual Meeting will be reduced accordingly.

                            THE BOARD OF DIRECTORS UNANIMOUSLY RECOMMENDS THAT
                         THE SHAREHOLDERS VOTE FOR THE ELECTION OF MESSRS.
                         WEST AND DORAN AS DIRECTORS AT THE 1998 ANNUAL
                         MEETING.

                            Set forth below is certain information concerning
                         Messrs. West and Doran and each of the four other
                         current directors whose terms continue after the 1998
                         Annual Meeting.


                         Nominees for election at the 1998 Annual Meeting:
 
                         ALFRED P. WEST, JR., 55, has been the Chairman of the
                         Board of Directors and Chief Executive Officer of the
                         Company since its inception in 1968. From June 1979
                         until August 1990, Mr. West also served as the
                         Company's President. He is a member of the
                         Compensation Committee of the Board of Directors.
 
                         WILLIAM M. DORAN, 57, has been a director since March
                         1985 and is a member of the Compensation Committee of
                         the Board of Directors. Mr. Doran is Secretary of the
                         Company and since October 1976 has been a partner in
                         the law firm of Morgan, Lewis & Bockius LLP,
                         Philadelphia, Pennsylvania. Mr. Doran is a trustee of
                         SEI Liquid Asset Trust, SEI Tax Exempt Trust, SEI
                         Daily Income Trust, SEI Institutional Managed Trust,
                         SEI Index Funds, SEI International Trust, SEI Asset
                         Allocation Trust, SEI Institutional Investments
                         Trust, The Arbor Fund, The Advisors' Inner Circle
                         Fund, and The Marquis Funds, each of which is an
                         investment
 
3
<PAGE>
 
                         company for which the Company's subsidiaries act as
                         advisor, administrator and/or distributor.

 
                         Director continuing in office with a term expiring in
                         1999:
 
                         HENRY H. PORTER, JR., 63, has been a director since
                         September 1981 and is a member of the Audit,
                         Compensation and Stock Option Committees of the Board
                         of Directors. Since June 1980, Mr. Porter has been a
                         private investor and financial consultant. Mr. Porter
                         is a member of the board of directors of Caldwell &
                         Orkin Funds, Inc., which is an investment company.
 
                            On February 24, 1998 Donald C. Carroll, a director
                         since 1979, died, resulting in a vacancy in the class
                         of directors with terms expiring in 1999. At this
                         time, the Board of Directors is not proposing a
                         nominee to fill the vacancy created by Mr. Carroll's
                         death because it is currently in the process of
                         reviewing candidates for such vacancy. It is
                         anticipated that the Board of Directors will fill
                         such vacancy within the next several months. Upon
                         election by the Board of Directors, the new director
                         will continue in office with a term expiring in 1999.
 

                         Directors continuing in office with terms expiring in
                         2000:
 
                         HENRY H. GREER, 60, has been a director since
                         November 1979 and is a member of the Audit Committee
                         of the Board of Directors. Mr. Greer has served as
                         the Company's President and Chief Operating Officer
                         since August 1990 and as the Company's Chief
                         Financial Officer since September 1996. From May 1989
                         until August 1990, Mr. Greer served as President of
                         the Company's Benefit Services Division under a
                         consulting arrangement. For the eleven-year period
                         prior to August 1990, Mr. Greer was President of the
                         Trident Capital Group, a venture capital firm.
 
                         RICHARD B. LIEB, 50, has been an Executive Vice
                         President of the Company since October 1990 and a
                         director since 1994. Mr. Lieb was named President of
                         the Company's Investment Systems and Services Unit
 
4
<PAGE>
 
                         in 1995. From 1986 to 1995, Mr. Lieb served in
                         various executive positions with the Company.
 
                         CARMEN V. ROMEO, 54, has been an Executive Vice
                         President of the Company since December 1985 and a
                         director since June 1979. Mr. Romeo is President of
                         the Company's Investment Advisory Group. Mr. Romeo
                         was Treasurer and Chief Financial Officer of the
                         Company from June 1979 until September 1996.
 
   Board and Committee   The Board of Directors of the Company held five
   Meetings              meetings in 1997. During the year, all current
                         directors attended at least 75% of all meetings of
                         the Board of Directors and of the committees on which
                         they served. Standing committees of the Board of
                         Directors of the Company are the Audit Committee,
                         Compensation Committee and Stock Option Committee.
                         Currently, the Audit Committee has two members,
                         Messrs. Greer and Porter. Members of the Compensation
                         Committee are Messrs. West, Doran and Porter.
                         Currently, the sole member of the Stock Option
                         Committee is Mr. Porter. The Board of Directors
                         anticipates that any candidate elected to fill the
                         vacancy created by the death of Mr. Carroll would
                         qualify as both a "Non-Employee Director" (as defined
                         in Rule 16b-3 under the Exchange Act) and an "Outside
                         Director" (as defined in Section 162(m) of the
                         Internal Revenue Code of 1986, as amended) and would
                         join Mr. Porter on the Stock Option Committee and
                         Messrs. Greer and Porter on the Audit Committee.
                           During 1997, the Audit Committee met two times. The
                         principal functions of the Audit Committee are to
                         review with management and the Company's independent
                         public accountants the scope and results of the
                         various audits conducted during the year; to discuss
                         with management and the Company's independent public
                         accountants the Company's annual financial
                         statements; and to review fees paid to, and the scope
                         of services provided by, the Company's independent
                         public accountants.
                            During 1997, the Compensation Committee met four
                         times. The principal function of the Compensation
                         Committee is to administer the Company's compensation
                         programs, including its stock option plans and
 
5
<PAGE>
 
                         bonus and incentive plans. The Compensation Committee
                         also reviews with management and approves the
                         salaries of senior corporate officers and employment
                         agreements between the Company and senior corporate
                         officers.
                            During 1997, the Stock Option Committee met one
                         time. The principal function of the Stock Option
                         Committee is to administer the Company's Stock Option
                         Plan. The Stock Option Committee was established in
                         February 1997.
                            The Board of Directors does not have a Nominating
                         Committee. The Board will consider nominees for
                         election to the Board of Directors recommended by the
                         Company's shareholders. All such recommendations
                         should be submitted in writing to the Board of
                         Directors at the Company's principal office.
 
                         OWNERSHIP OF SHARES
 
                         The following table contains information as of
                         February 28, 1998 relating to the beneficial
                         ownership of Shares by each of the members of the
                         Board of Directors, the Chief Executive Officer and
                         each of the four other most highly compensated
                         executive officers of the Company, by members of the
                         Board of Directors and the Company's officers as a
                         group, and by the holders of 5% or more of the total
                         Shares outstanding. As of February 28, 1998, there
                         were 17,729,912 Shares outstanding. Information as to
                         the number of Shares owned and the nature of
                         ownership has been provided by these persons and is
                         not within the direct knowledge of the Company.
                         Unless otherwise indicated, the named persons possess
                         sole voting and investment power with respect to the
                         Shares listed.
 
6
<PAGE>
 
<TABLE>
<CAPTION>
                                                                        PERCENT
                NAME OF INDIVIDUAL                          NUMBER OF     OF
                OR IDENTITY OF GROUP                     SHARES OWNED CLASS (1)
                ---------------------------------------------------------------
                <S>                                      <C>          <C>
                Alfred P. West, Jr.(/2/)................  5,223,537     29.4%
                William M. Doran(/3/) (/4/).............    804,320      4.5%
                Carmen V. Romeo(/3/) (/5/)..............    429,580      2.4%
                Henry H. Greer(/3/).....................    377,476      2.1%
                Richard B. Lieb(/3/)....................    217,250      1.2%
                Edward D. Loughlin(/3/).................    185,167      1.0%
                Henry H. Porter, Jr.(/3/)...............     62,000       *
                All executive officers and directors as
                 a group (10 persons)(/6/)..............  6,855,916     36.5%
                Thomas W. Smith(/7/)....................  1,812,300     10.2%
                Thomas N. Tryforos(/7/).................  1,444,814      8.1%
                ---------------------------------------------------------------
</TABLE>
 
                       *  Less than one percent.
                      (1) Applicable percentage of ownership is based on
                          17,729,912 Shares of Common Stock outstanding on
                          February 28, 1998. Beneficial ownership is
                          determined in accordance with the rules of the
                          Securities and Exchange Commission and means voting
                          or investment power with respect to securities.
                          Shares of Common Stock issuable upon the exercise of
                          stock options exercisable currently or within 60
                          days of February 28, 1998 are deemed outstanding and
                          to be beneficially owned by the person holding such
                          option for purposes of computing such person's
                          percentage ownership, but are not deemed outstanding
                          for the purpose of computing the percentage
                          ownership of any other person. Except for Shares
                          held jointly with a person's spouse or subject to
                          applicable community property laws, or as indicated
                          in the footnotes to this table, each shareholder
                          identified in the table possesses sole voting and
                          investment power with respect to all Shares of
                          Common Stock shown as beneficially owned by such
                          shareholder.
                      (2) Includes an aggregate of 4,000 Shares held by Mr.
                          West's wife and 816,734 Shares held in trusts for
                          the benefit of Mr. West's children, of which Mr.
                          West's wife is a trustee or co-trustee. Mr. West
                          disclaims beneficial ownership of the Shares held in
                          trust. Also includes 756,250 Shares held by APWest
                          Associates, L.P., a Delaware limited partnership of
                          which Mr. West is the sole general partner. Also
                          includes 18,000 Shares which may be acquired upon
                          exercise of stock options exercisable within 60 days
                          of February 28, 1998 by a trust, the beneficiaries
                          of which are not related to
 
7
<PAGE>
 
                          Mr. West, of which Mr. West is a trustee. Mr. West's
                          address is c/o SEI Investments Company, Oaks, PA
                          19456-1100.
                      (3) Includes, with respect to Messrs. Doran, Porter,
                          Greer, Romeo, Lieb, and Loughlin, 12,000, 30,000,
                          341,500, 102,500, 148,250 and 177,750 Shares,
                          respectively, which may be acquired upon exercise of
                          stock options exercisable within 60 days of February
                          28, 1998.
                      (4) Includes an aggregate of 699,000 Shares held in
                          trust for the benefit of Mr. West's children, of
                          which Mr. Doran is a co-trustee and, accordingly,
                          shares voting and investment power. Mr. Doran
                          disclaims beneficial ownership of the Shares held in
                          trust.
                      (5) Includes an aggregate of 5,000 Shares held in
                          custodianship for the benefit of Mr. Romeo's minor
                          children, of which Mr. Romeo's brother is a
                          custodian. Mr. Romeo disclaims beneficial ownership
                          of the Shares held in custodianship.
                      (6) Includes 1,058,950 Shares which may be acquired upon
                          the exercise of stock options exercisable within 60
                          days of February 28, 1998.
                      (7) Messrs. Smith and Tryforos share voting and
                          investment power with respect to 1,437,000 Shares in
                          their capacities as general partners to private
                          investment limited partnerships and trustees of a
                          profit sharing trust. Mr. Smith is the beneficial
                          owner of an additional 100,300 Shares in his
                          capacity as investment manager to certain managed
                          accounts. Mr. Tryforos is the beneficial owner of an
                          additional 790 Shares in his capacity as investment
                          manager to certain managed accounts. In addition,
                          Messrs. Smith and Tryforos own 275,000 and 7,024
                          Shares, respectively, for their own accounts. The
                          address of Messrs. Smith and Tryforos is 323
                          Railroad Avenue, Greenwich, CT 06830.
 
                          EXECUTIVE COMPENSATION
  
                          The Summary Compensation Table set forth below
                          includes individual compensation information on the
                          Company's Chief Executive Officer and the Company's
                          four other most highly paid executive officers for
                          services rendered in all capacities for the years
                          ended December 31, 1997, 1996 and 1995.
 
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<PAGE>
 
                              SUMMARY COMPENSATION TABLE
 
<TABLE>
<CAPTION>
                                                              LONG-TERM
                                  ANNUAL COMPENSATION    COMPENSATION AWARDS
                                  ------------------- --------------------------
                                                       SECURITIES    ALL OTHER
                           FISCAL  SALARY     BONUS    UNDERLYING   COMPENSATION
NAME & PRINCIPAL POSITION   YEAR   ($) (1)   ($) (2)  OPTIONS/SAR'S   ($) (3)
- --------------------------------------------------------------------------------
<S>                        <C>    <C>       <C>       <C>           <C>
Alfred P. West, Jr........  1997  $ 310,000 $ 365,000       -0-        $3,840
 Chairman of the Board and  1996  $ 310,000 $ 190,000       -0-        $3,600
 Chief Executive Officer    1995  $ 310,000 $ 240,000       -0-        $3,600
Henry H. Greer............  1997  $ 285,000 $ 290,000    15,000        $3,840
 Director, President,
  Chief Operating Officer   1996  $ 285,000 $ 165,000    15,000        $3,600
 and Chief Financial Offi-
  cer                       1995  $ 285,000 $ 215,000       -0-        $3,600
Richard B. Lieb...........  1997  $ 260,000 $ 315,000    20,000        $3,840
 Director and Executive     1996  $ 260,000 $ 190,000    15,000        $3,600
 Vice President             1995  $ 260,000 $ 265,000       -0-        $3,600
Edward D. Loughlin........  1997  $ 250,000 $ 275,000    15,000        $3,840
 Executive Vice President   1996  $ 250,000 $ 175,000    15,000        $3,600
                            1995  $ 250,000 $ 150,000       -0-        $3,600
Carmen V. Romeo...........  1997  $ 250,000 $ 275,000    25,000        $3,840
 Director and Executive
  Vice President            1996  $ 250,000 $ 200,000    15,000        $3,600
                            1995  $ 250,000 $ 150,000       -0-        $3,600
- --------------------------------------------------------------------------------
</TABLE>
 
(1) Compensation deferred at the election of the executive, pursuant to the
    Company's Capital Accumulation Plan ("CAP"), is included in the year earned.
(2) Cash bonuses for services rendered during 1997, 1996 and 1995 have been
    listed in the year earned, but were actually paid in the following fiscal
    year.
(3) The stated amounts are Company matching contributions to the CAP.
 
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<PAGE>
 
                            The Company has an employment agreement with Mr.
                         West (which renews annually in May) pursuant to which
                         he is entitled to a certain minimum base salary, a
                         bonus based on the performance of the Company, and
                         certain retirement benefits. The Company also has an
                         employment agreement with Mr. Richard B. Lieb,
                         Executive Vice President of the Company. Mr. Lieb's
                         employment agreement is for a one-year term and
                         renews annually in July of each year unless
                         terminated prior thereto by either Mr. Lieb or the
                         Company. In the event that the Company terminates his
                         employment agreement without cause, Mr. Lieb is
                         entitled to one year's severance pay. Mr. Lieb's
                         employment agreement provides for a certain minimum
                         base salary and participation in management bonus
                         programs. Mr. Lieb received a base salary of $260,000
                         in 1997.
                            The Securities and Exchange Commission's proxy
                         rules also require disclosure of the range of
                         potential realizable values from stock options
                         granted during the fiscal year ended December 31,
                         1997, at assumed rates of stock price appreciation
                         through the expiration date of the options, and the
                         value realized from the exercise of options during
                         the fiscal year ended December 31, 1997.
 
                                         OPTION GRANTS IN LAST FISCAL YEAR
 
<TABLE>
<CAPTION>
                                                                INDIVIDUAL GRANTS
                -----------------------------------------------------------------------------------------
                                           NUMBER OF
                                          SECURITIES     % OF TOTAL
                                          UNDERLYING   OPTIONS/SAR'S  EXERCISE OR
                                         OPTIONS/SAR'S   GRANTED TO   BASE PRICE              GRANT DATE
                                            GRANTED     EMPLOYEES IN   PER SHARE  EXPIRATION   PRESENT
                NAME                        (#)(1)     FISCAL YEAR(2)   ($/SH)       DATE    VALUE ($)(3)
                -----------------------------------------------------------------------------------------
                <S>                      <C>           <C>            <C>         <C>        <C>
                Alfred P. West, Jr. ....       -0-          0.0%            N/A        N/A           N/A
                Henry H. Greer..........    10,000          2.4%        $19.500    4/24/07   $ 89,200.00
                                             5,000                      $42.000    12/8/07   $ 99,350.00
                Richard B. Lieb.........    10,000          3.2%        $19.500    4/24/07   $ 89,200.00
                                            10,000                      $42.000    12/8/07   $198,700.00
                Edward D. Loughlin......    10,000          2.4%        $19.500    4/24/07   $ 89,200.00
                                             5,000                      $42.000    12/8/07   $ 99,350.00
                Carmen V. Romeo.........    10,000          4.0%        $19.500    4/24/07   $ 89,200.00
                                            15,000                      $42.000    12/8/07   $298,050.00
                -----------------------------------------------------------------------------------------
</TABLE>
                         (1) All options granted to the named executive
                             officers were non-qualified options granted on
                             April 24, 1997 and December 8, 1997, at an
                             exercise price equal to the fair market value on
                             such date. The April 24, 1997 options become
                             exercisable in four equal annual installments
                             beginning one year from the date
 
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<PAGE>
 
                            of option grant. These options have an exercise
                            price equal to the fair market value of the Shares
                            as of the date of grant and a ten-year term. The
                            December 8, 1997 options become exercisable in two
                            equal installments upon achievement by the Company
                            of certain earnings per share goals; provided that
                            all options fully vest upon the seventh anniversary
                            of the date of the option grant.
                        (2) Based on total number of Shares granted to
                            employees in 1997 of 622,000.
                        (3) Based on the Black-Scholes option pricing model
                            adapted for use in valuing executive stock
                            options. The actual value, if any, an executive
                            officer may realize will depend on the excess of
                            the stock price over the exercise price on the
                            date of exercise; therefore, there is no assurance
                            that the value actually received by an executive
                            officer will be at or near the value estimated by
                            the Black-Scholes model. The estimated values
                            under the model are based on arbitrary assumptions
                            as to variables such as interest rates, stock
                            price, volatility, and future dividend yield. The
                            key assumptions used in the Black-Scholes model
                            valuation of the options are (i) an annual
                            dividend yield of 1% for both option grants, (ii)
                            a risk free rate of return of 7.052% for the
                            4/24/97 options and 6.054% for the 12/8/97
                            options, (iii) a beta coefficient of 34.71% for
                            the 4/24/97 options and 40.01% for the 12/8/97
                            options, (iv) an exercise date of 7 years from the
                            date of grant for both option grants, and (v) no
                            reduction in values to reflect non-transferability
                            and other restrictions on the options. These
                            assumptions are not a forecast of future dividend
                            yield or stock price performance or volatility.
 
  AGGREGATED OPTION EXERCISES IN LAST FISCAL YEAR AND FISCAL YEAR END OPTION
                                    VALUES
 
<TABLE>
<CAPTION>
                                                       NUMBER OF
                                                  SECURITIES UNDERLYING     VALUE OF UNEXERCISED,
                                                       UNEXERCISED              IN-THE-MONEY
                                                      OPTIONS HELD            OPTIONS AT FISCAL
                            SHARES      VALUE    AT FISCAL YEAR-END (#)        YEAR END ($)(2)
                          ACQUIRED ON  REALIZED ------------------------- -------------------------
NAME                     EXERCISE (#)   ($)(1)  EXERCISABLE UNEXERCISABLE EXERCISABLE UNEXERCISABLE
- ---------------------------------------------------------------------------------------------------
<S>                      <C>           <C>      <C>         <C>           <C>         <C>
Alfred P. West, Jr......       -0-     $      0       -0-         -0-     $         0   $      0
Henry H. Greer..........       -0-     $      0   339,000      30,000     $10,294,281   $543,281
Richard B. Lieb.........    41,000     $865,437   145,750      36,250     $ 4,455,656   $572,969
Edward D. Loughlin......       -0-     $      0   175,250      28,750     $ 4,587,906   $513,594
Carmen V. Romeo.........    20,000     $705,000   100,000      40,000     $ 2,839,844   $543,281
- ---------------------------------------------------------------------------------------------------
</TABLE>
(1) Represents the difference between the closing price of the Company's
    Common Stock on the exercise date and the exercise price of the options.
(2) Represents the difference between the closing price of the Company's
    Common Stock at December 31, 1997 ($42.00) and the exercise price of the
    options.
 
11
<PAGE>
 
                      
              Director   Each director who is not an employee of the Company
          Compensation   receives $1,800 per meeting attended and an annual
                         retainer of $10,800. The chairman of the Audit
                         Committee receives an additional annual fee of
                         $2,400.
                            In 1997, Messrs. Doran and Porter, the Company's
                         non-employee directors, each received options to
                         purchase 4,000 Shares at an exercise price of $42.00
                         per share under the SEI Investments Company 1997
                         Stock Option Plan, which was adopted by the Board of
                         Directors on December 4, 1997. These options have an
                         exercise price equal to the fair market value of the
                         Shares as of the date of grant and a ten-year term.
                         The options become exercisable in two equal
                         installments upon achievement by the Company of
                         certain earnings per share goals; provided that all
                         options fully vest upon the seventh anniversary of
                         the date of the option grant.
 
  Notwithstanding anything to the contrary, the following Report of the
  Compensation Committee and the Performance Graph on page 17 shall not be
  deemed incorporated by reference by any general statement incorporating by
  reference this proxy statement into any filing under the Securities Act of
  1933, as amended, or under the Exchange Act, except to the extent that the
  Company specifically incorporates this information by reference, and shall
  not otherwise be deemed filed under such Acts.
 
          Compensation   The Company's compensation philosophy (which is
   Committee Report on   intended to apply to all members of management,
             Executive   including the Chief Executive Officer and the
          Compensation   President and Chief Operating Officer), as
                         implemented by the Compensation Committee, is to
                         provide a compensation program which results in
                         competitive levels of compensation and which
                         incorporates incentives for management to attain the
                         Company's annual goals and longer term objectives.
                         The Company believes that this approach enables it to
                         attract, retain and reward highly qualified
                         personnel.
                            The Compensation Committee, consisting of two non-
                         employee directors and Mr. West, the Chairman and
                         Chief Executive Officer and largest shareholder of
                         the Company, approves all policies and plans under
                         which compensation is paid or awarded to management
                         employees. Included in this group are management
                         employees of all of the Company's business units
                         other than sales employees who are under sales
                         commission compensation plans. The compensation
                         program for management employees consists of base
                         salary; bonuses pursuant to incentive plans; and
 
12
<PAGE>
 
                         grants of stock options (in addition to benefits
                         afforded all employees such as healthcare insurance
                         and stock purchase and defined contribution plans).
                         Included in management is the Company's 16 member
                         Management Committee which is referred to herein as
                         "senior management."
                            In 1997, the Compensation Committee retained an
                         independent compensation consulting firm to review
                         compensation levels for senior management and its
                         overall compensation program. Its review included a
                         comparison of compensation of senior management to
                         the compensation for senior executives of comparable
                         companies and interviews with individual members of
                         senior management. As a result of this review the
                         Compensation Committee implemented certain changes in
                         the compensation program designed to (1) align
                         compensation more closely to long-term and short-term
                         profitability and other financial goals and (2)
                         encourage long-term stock ownership of senior
                         management. The Compensation Committee believes that
                         these objectives will enhance shareholder value.
                            The discussion below describes the Compensation
                         Committee's compensation process for 1997 and its
                         1998 strategies for compensation.
 
                        Base Salaries
 
                         The Compensation Committee seeks to set base salaries
                         for senior management at levels that are competitive
                         with salaries paid to management with comparable
                         qualifications, experience, and responsibilities at
                         companies of comparable size engaged in the same or
                         similar businesses as the Company. Since 1992, the
                         Committee has minimized base salary increases for
                         senior management and, in general, base salaries have
                         not increased from 1992 to 1997 except in connection
                         with promotions or increased responsibilities of
                         certain individuals. The Committee expects to
                         continue to minimize base salary increases with
                         incentive compensation tied to performance objectives
                         becoming a larger portion of overall compensation.
                         Base salaries, however, may be adjusted if an officer
                         is promoted to a higher level management position or
                         is given increased responsibilities.
 
13
<PAGE>
 
                            As discussed above, in 1997 the Company retained
                         an independent compensation consulting firm to
                         provide competitive compensation information which
                         was used by the Compensation Committee in reviewing
                         base salaries and total compensation for senior
                         management. Based upon this information, other
                         compensation data reviewed by the Committee and its
                         overall compensation objectives, the Company believes
                         the base salaries for senior management are set at
                         appropriate levels.
 
                        Incentive Bonuses
 
                         During the beginning of each year, the Compensation
                         Committee reviews target performance goals which are
                         developed by the Chief Executive Officer, the
                         President and Chief Operating Officer, and senior
                         management of the Company. The Compensation Committee
                         uses these to set threshold and target performance
                         goals for purposes of the incentive compensation plan
                         for the year. Goals are established at the corporate
                         level and also at business unit levels. Bonus pools
                         for achieving targets are established for business
                         units and for senior management (including the Chief
                         Executive Officer and the President and Chief
                         Operating Officer). These target bonus pools are
                         prorated if the target goals are exceeded or if they
                         are not met, provided that the threshold goals are
                         met.
                            During December of each year, the Compensation
                         Committee reviews the Company's actual performance as
                         compared to the threshold and target goals and
                         determines the total amount of bonuses for the year
                         and the specific bonuses to be paid to the Chief
                         Executive Officer, the President and Chief Operating
                         Officer and senior management. In addition, the size
                         of the final bonus pools may be adjusted for non-
                         financial achievements, changes in the market units
                         or other organizational changes during the year. The
                         amount of the bonus paid to each member of senior
                         management (other than the Chief Executive Officer
                         and the President and Chief Operating Officer) is
                         based upon recommendations from the Chief Executive
                         Officer and the President and Chief Operating Officer
                         and reflects, in addition to overall Company
                         performance, the performance of his or her business
                         unit, and any individual achievements
 
14
<PAGE>
 
                         during the year as well as internal and client
                         evaluations. The amounts of the bonuses paid to the
                         Chief Executive Officer and the President and Chief
                         Operating Officer of the Company are determined by
                         the non-employee members of the Compensation
                         Committee based upon the Company's achievement of
                         profitability and revenue growth goals and the
                         achievement of strategic organizational goals.
                            In December 1997, the Compensation Committee
                         reviewed the financial performance of the Company for
                         1997 and the achievement of the non-financial goals.
                         Based on its conclusion that the Company met
                         substantially all of its financial and non-financial
                         goals, the Compensation Committee approved the full
                         amount of incentive bonuses for senior management
                         that were established during the year.
                            For 1998, the Compensation Committee adopted a
                         corporate compensation plan that is based on
                         assigning each employee an individual potential
                         compensation award. The actual award is then based on
                         the achievement of (1) corporate goals, (2) the
                         employee's business unit goals and (3) the employee's
                         individual goals. The individual potential
                         compensation award assigned at the beginning of the
                         year replaces business unit compensation pools which
                         were used in prior years. The Compensation Committee
                         believes that the individual potential awards will
                         give employees more predictability as to the
                         incentive compensation to be achieved.
 
                        Stock Options
 
                         Prior to 1992, the philosophy of the Company was to
                         grant stock options to senior management as an
                         additional form of compensation for services
                         rendered. In accordance with this philosophy, senior
                         management normally would receive option grants each
                         year except that Mr. West, the Chairman, Chief
                         Executive Officer and largest shareholder of the
                         Company, has never received stock option grants from
                         the Company.
                            The Compensation Committee believes that ownership
                         of Common Stock and options increases the alignment
                         of management's incentives to the long-term goals of
                         the Company and its shareholders. To
 
15
<PAGE>
 
                         this end more options were granted in 1997 than 1996,
                         but the vesting provisions were changed so that the
                         options are not exercisable for seven years unless
                         the Company achieves certain earnings targets which
                         would accelerate the vesting schedule. Prior grants
                         vested equally over four years. In addition, the
                         Compensation Committee approved and recommended to
                         the Board of Directors the 1998 Equity Compensation
                         Plan (described in Proposal No. 2), and modifications
                         to the Company's stock purchase plan (described in
                         Proposal No. 3) and the Company's Capital
                         Accumulation Plan to facilitate stock ownership.
 
                        Application of Section 162(m)
 
                         Payments during 1997 to the Company's management
                         employees as discussed above were made with regard to
                         the provisions of Section 162(m) of the Internal
                         Revenue Code of 1986, as amended (the "Code").
                         Section 162(m) limits the deduction that may be
                         claimed by a "public company" for compensation paid
                         to certain individuals to $1 million except to the
                         extent that any excess compensation is "performance-
                         based compensation." It is the Compensation
                         Committee's intention to consider the deductibility
                         of compensation under Section 162(m).
 
                            COMPENSATION COMMITTEE
 
                              Alfred P. West, Jr.
                              William M. Doran
                              Henry H. Porter, Jr.
 
          Compensation   Members of the Company's Compensation Committee are
  Committee Interlocks   Messrs. West, Doran and Porter. Mr. West is the Chief
           and Insider   Executive Officer of the Company. Mr. Doran is a
         Participation   partner in the law firm of Morgan, Lewis & Bockius
                         LLP, which performed services for the Company during
                         the year ended December 31, 1997. The Company
                         proposes to retain the services of such firm in 1998.
 
16
<PAGE>
 
                         STOCK PRICE PERFORMANCE GRAPH
 
                         The Stock Price Performance Graph below compares the
                         yearly percentage change in the cumulative total
                         return (based upon changes in share prices) of the
                         Company's Common Stock against the NASDAQ National
                         Market System ("NASDAQ Market Index") and a peer
                         industry group that consists of software, data
                         processing companies (40%) and financial, fund
                         management companies (60%). The percentage allocation
                         for each industry group is based on the approximate
                         percentage of the Company's revenue attributable to
                         each line of business during the fiscal year ended
                         December 31, 1997. The graph assumes a $100
                         investment on January 1, 1993 and the reinvestment of
                         all dividends.
 
 
                Comparison of Cumulative Total Return of SEI Investments,
                Industry Index, and NASDAQ Market Index

                          [LINE GRAPH APPEARS HERE] 
 
17
<PAGE>
 
      (Proposal No. 2)
                         APPROVAL OF SEI INVESTMENTS COMPANY 1998 EQUITY
                         COMPENSATION PLAN
 
                         At the 1998 Annual Meeting, there will be presented
                         to shareholders a proposal to approve the adoption of
                         the SEI Investments Company 1998 Equity Compensation
                         Plan (the "1998 Equity Compensation Plan"). The Board
                         of Directors adopted the 1998 Equity Compensation
                         Plan on April 23, 1998, subject to shareholder
                         approval. If approved by shareholders at the 1998
                         Annual Meeting, the 1998 Equity Compensation Plan
                         will be effective on May 21, 1998. The 1998 Equity
                         Compensation Plan is intended to replace the
                         Company's Stock Option Plan and 1997 Stock Option
                         Plan. The Board of Directors believes the 1998 Equity
                         Compensation Plan will help the Company attract,
                         retain and motivate employees, directors and key
                         advisors, and will encourage participants to devote
                         their best efforts to the business and financial
                         success of the Company. The Board of Directors
                         believes that providing employees, directors and key
                         advisors with the opportunity to acquire an equity
                         interest in the Company, will serve to align their
                         interests closely with other shareholders. The
                         principal terms of the 1998 Equity Compensation Plan
                         are discussed below.
                            THE AFFIRMATIVE VOTE OF A MAJORITY OF THE VOTES
                         CAST AT THE 1998 ANNUAL MEETING BY THE HOLDERS OF
                         OUTSTANDING SHARES IS REQUIRED TO APPROVE THE 1998
                         EQUITY COMPENSATION PLAN. THE BOARD OF DIRECTORS
                         UNANIMOUSLY RECOMMENDS THAT THE SHAREHOLDERS VOTE FOR
                         APPROVAL OF THIS PROPOSAL.
 
                         DESCRIPTION OF THE 1998 EQUITY COMPENSATION PLAN
 
                         The 1998 Equity Compensation Plan provides for grants
                         of stock options, restricted stock and stock
                         appreciation rights to selected employees (including
                         employees who are also directors) of the Company or
                         its subsidiaries, key advisors (including
                         consultants) who perform valuable services to the
                         Company or its subsidiaries and directors who are not
                         employees of the Company. In addition, the 1998
                         Equity Compensation Plan provides for grants of
                         performance units to employees and key
 
18
<PAGE>
 
                         advisors. Grants of stock options, restricted stock,
                         stock appreciation rights and performance units are
                         referred to collectively as "Grants." The Company
                         intends to file a registration statement on Form S-8
                         to register the Shares issuable under the 1998 Equity
                         Compensation Plan if the 1998 Equity Compensation
                         Plan is approved by the shareholders.
                            General. Subject to adjustment in certain
                         circumstances as discussed below and to shareholder
                         approval of the 1998 Equity Compensation Plan, the
                         1998 Equity Compensation Plan provides that the total
                         number of Shares that may be issued or transferred
                         under the 1998 Equity Compensation Plan is the sum of
                         (i) 1.5 million Shares, and (ii) the number of Shares
                         reserved for issuance, but not subject to outstanding
                         or previously exercised stock options granted, as of
                         May 21, 1998, under the Company's Stock Option Plan
                         and 1997 Stock Option Plan, plus any Shares that, but
                         for the termination of such plans, would have again
                         become available for grants after May 21, 1998,
                         because of the termination, expiration, cancellation,
                         forfeiture, or surrender of options previously
                         granted under such plans. The maximum number of
                         Shares that may be subject to incentive stock options
                         granted under the 1998 Equity Compensation Plan is
                         1.5 million Shares. If, and to the extent, Grants
                         under the 1998 Equity Compensation Plan expire, or
                         are canceled, forfeited, exchanged, surrendered, or
                         terminated for any reason without being exercised, or
                         the shares subject to a Grant are forfeited, the
                         Shares subject to such Grant again will be available
                         for grant under the 1998 Equity Compensation Plan. In
                         addition, any Shares delivered to the Company to
                         exercise a stock option granted under the 1998 Equity
                         Compensation Plan, or to satisfy the Company's
                         withholding obligations with respect to any Grants
                         made under the 1998 Equity Compensation Plan will
                         also be available for Grant under the 1998 Equity
                         Compensation Plan.
                            Administration of the 1998 Equity Compensation
                         Plan. The 1998 Equity Compensation Plan will be
                         administered and interpreted by a committee (the
                         "Committee") of the Board of Directors consisting of
                         not less than two persons appointed by the Board of
                         Directors from among its members, each of whom may,
                         but is not required to, be a "non-employee" director
                         as defined in Rule 16b-3 under the Exchange Act and
                         an "outside director" as defined by Section 162(m) of
                         the Internal Revenue Code of
 
19
<PAGE>
 
                         1986, as amended (the "Code"). The Stock Option
                         Committee will serve as the Committee required by the
                         1998 Equity Compensation Plan.
                            The Committee has the authority to determine (i)
                         the persons to whom Grants may be made under the 1998
                         Equity Compensation Plan, (ii) the type, size and
                         other terms and conditions of each Grant, (iii) the
                         time when the Grants will be made and the duration of
                         any applicable exercise or restriction period,
                         including the criteria for vesting and the
                         acceleration of vesting, and (iv) any other matters
                         arising under the 1998 Equity Compensation Plan. In
                         addition to any Grants made at the discretion of the
                         Committee, directors who are not employees of the
                         Company will, as discussed below, receive automatic
                         grants of stock options under the 1998 Equity
                         Compensation Plan.
                            The Committee has full power and authority to
                         administer and interpret the 1998 Equity Compensation
                         Plan, to make factual determinations and to adopt or
                         amend such rules, regulations, agreements and
                         instruments for implementing the 1998 Equity
                         Compensation Plan and for conduct of its business as
                         it deems necessary or advisable, in its sole
                         discretion. Notwithstanding the foregoing, the Board
                         of Directors may ratify or approve Grants, in which
                         case references to the "Committee" shall be deemed to
                         include the Board of Directors.
                            Grants. Grants under the 1998 Equity Compensation
                         Plan may consist of (i) options intended to qualify
                         as incentive stock options ("ISOs") within the
                         meaning of section 422 of the Code, (ii) nonqualified
                         stock options that are not intended to so qualify
                         ("NQSOs", and together with ISOs, "Options"), (iii)
                         restricted stock, (iv) stock appreciation rights
                         ("SARs") or (v) performance units.
 
20
<PAGE>
 
                            Eligibility for Participation. Grants may be made
                         to any employees (including officers and directors)
                         of, or key advisors or consultants to, the Company or
                         its subsidiaries and to directors who are not
                         employees of the Company. As of April 7, 1998, 1,088
                         employees (including 4 employee directors) and 2
                         directors who are not employees of the Company would
                         have been eligible for Grants under the 1998 Equity
                         Compensation Plan. One key advisor would have been
                         eligible for Grants under the 1998 Equity
                         Compensation Plan. During any calendar year, no
                         participant may receive Grants under the 1998 Equity
                         Compensation Plan for more than 100,000 Shares.
                            Options. The exercise price of any Option granted
                         under the 1998 Equity Compensation Plan will not be
                         less than the fair market value of the underlying
                         Shares on the date of grant. However, the exercise
                         price of an ISO granted to an employee who owns more
                         than 10% of the total combined voting power of all
                         classes of the stock of the Company or its
                         subsidiaries may not be less than 110% of the fair
                         market value of the underlying Shares on the date of
                         grant and the exercise price of an NQSO may be less
                         than the fair market value of the underlying Shares
                         on the date of grant, if the Grant is conditioned on
                         the satisfaction of performance goals, which may, but
                         are not required to be, designed to meet the
                         requirements of "qualified performance-based
                         compensation" under Section 162(m) of the Code.
                            The Committee will determine the term of each
                         Option; provided, however, that the exercise period
                         may not exceed ten years from the date of grant, and
                         the exercise period of an ISO granted to an employee
                         who owns more than 10% of the total voting power of
                         all outstanding stock of the Company or its
                         subsidiaries may not exceed five years from the date
                         of grant. A participant may pay the exercise price
                         (i) in cash, (ii) with the approval of the Committee,
                         by delivering Shares owned by the participant and
                         having a fair market value on the date of exercise
                         equal to the exercise price or (iii) by any other
                         method approved by the Committee. The Committee may
                         permit a participant to instruct the Company to
                         deliver the Shares due upon the exercise to a
                         designated broker instead of to the participant.
 
21
<PAGE>
 
                            Automatic NQSO Grants to Directors who are not
                         Employees of the Company. In addition to any other
                         Grants made under the 1998 Equity Compensation Plan,
                         a director who is not an employee of the Company will
                         be granted an NQSO to purchase 8,000 Shares as of the
                         date of the director's initial appointment to the
                         Board of Directors (or at such other time as the
                         Committee may determine), and an NQSO to purchase
                         4,000 Shares on each December 31st thereafter (or the
                         date of any year-end Grants to employees or such
                         other time as the Committee may determine), if the
                         individual qualifies as a director who is not an
                         employee of the Company on such date. The exercise
                         price of such NQSOs will be equal to the fair market
                         value of the underlying Shares on the date of grant.
                         The term of the NQSOs will be ten years and the NQSOs
                         will become exercisable in four equal installments on
                         the first, second, third and fourth anniversaries of
                         the date of grant, unless the Committee determines
                         otherwise. No portion of any NQSO will become
                         exercisable after an individual ceases to be a
                         director, unless the individual is an employee of the
                         Company at such time.
                            Restricted Stock. The Committee may issue Shares
                         to participants pursuant to the 1998 Equity
                         Compensation Plan. Shares may be issued for cash
                         consideration or for no cash consideration, as the
                         Committee determines. The number of Shares granted to
                         each participant shall be determined by the
                         Committee, subject to the maximum individual limit
                         described above. Grants of restricted stock will be
                         made subject to such performance requirements,
                         vesting provisions, transfer restrictions or other
                         restrictions and conditions as the Committee may
                         determine.
                            Stock Appreciation Rights. The Committee may grant
                         SARs alone or in tandem with any stock option
                         pursuant to the 1998 Equity Compensation Plan. Unless
                         the Committee determines otherwise, the base price of
                         an SAR will be the exercise price of the related
                         stock option or, if there is no related option, the
                         fair market value of a Share on the date of grant of
                         the SAR. When the participant exercises an SAR, the
                         participant will receive the amount by which the fair
                         market value of a Share on the date of exercise
                         exceeds the base price of the SAR. The Committee will
                         determine whether the appreciation will be paid in
                         cash or in Shares, or in
 
22
<PAGE>
 
                         a combination of the two. To the extent a participant
                         exercises a tandem SAR, the related option will
                         terminate. Similarly, upon exercise of a stock
                         option, the related SAR, if any, will terminate.
                            Performance Units. The Committee may grant
                         performance units to employees or key advisors.
                         Performance units may be payable in cash or Shares at
                         the end of a specified performance period. Payment
                         will be contingent upon achieving performance goals
                         by the end of the performance period. The measure of
                         a performance unit may be based on the fair market
                         value of a Share or such other measurement base as
                         the Committee may determine. The Committee will
                         determine the performance criteria, the length of the
                         performance period, the maximum payment value of an
                         award, and the minimum performance goals required
                         before payment will be made.
                            Section 162(m). Under Section 162(m) of the Code,
                         the Company may be precluded from claiming a federal
                         income tax deduction for total remuneration in excess
                         of $1,000,000 paid to the chief executive officer or
                         to any of the other four most highly compensated
                         officers in any one year. Total remuneration includes
                         amounts received upon the exercise of stock options
                         and SARs granted under the 1998 Equity Compensation
                         Plan, amounts received in connection with the grant
                         of performance units and the value of Shares received
                         when the Shares of restricted stock became
                         transferable (or such other time when income is
                         recognized). An exception exists, however, for
                         "qualified performance-based compensation." The 1998
                         Equity Compensation Plan is intended to allow Grants
                         to meet the requirements of "qualified performance-
                         based compensation."
                            Stock options and SARs should generally meet the
                         requirements of "qualified performance-based
                         compensation," if the exercise price is at least
                         equal to the fair market value of the Shares on the
                         date of grant. In addition, the Committee may
                         determine that performance units, NQSOs granted with
                         an exercise price that is less than the fair market
                         value of the underlying Shares on the date of grant
                         ("Discounted Options") and restricted stock are
                         intended to be "qualified performance-based
                         compensation" under Section 162(m) of the Code.
 
23
<PAGE>
 
                            With respect to grants of Discounted Options,
                         restricted stock and performance units intended to be
                         "qualified performance-based compensation," the
                         Committee will establish in writing the objective
                         performance goals that must be met and other
                         conditions of the award before the beginning of the
                         performance period or during a period permitted by
                         Section 162(m) of the Code. The performance goals may
                         relate to the employee's business unit or the
                         performance of the Company and its subsidiaries as a
                         whole, or any combination of the two. The Committee
                         will use objectively determinable performance goals
                         based on one or more of the following criteria: stock
                         price, earnings per share, net earnings, operating
                         earnings, return on assets, shareholder return,
                         return on equity, growth in assets, unit volume,
                         sales, market share, or strategic business criteria
                         consisting of one or more objectives based on meeting
                         specified revenue goals, market penetration goals,
                         geographic business expansion goals, cost targets or
                         goals relating to acquisitions or divestitures. The
                         Committee will not have discretion to increase the
                         amount of compensation that is payable upon
                         achievement of performance goals.
                            If Discounted Options, restricted stock or
                         performance units measured with respect to the fair
                         market value of Shares are granted as "qualified
                         performance-based compensation," not more than
                         100,000 Shares may be granted to an employee under
                         the Discounted Options, performance units or
                         restricted stock for any year of a performance
                         period. If performance units are measured with
                         respect to other criteria, the maximum amount that
                         may be paid to an employee with respect to each year
                         of a performance period is $1,000,000. At the end of
                         each performance period, the Committee will certify
                         the results of the performance goals and the extent
                         to which the performance goals have been met.
                            Transferability. Grants are generally not
                         transferable by the participant, except in the event
                         of death. However, the Committee may grant NQSOs that
                         allow the participant to transfer the NQSOs on
                         certain conditions.
 
24
<PAGE>
 
                            Amendment and Termination of the 1998 Equity
                         Compensation Plan. The Board of Directors may amend
                         or terminate the 1998 Equity Compensation Plan at any
                         time; provided, however, that the Board of Directors
                         may not, without shareholder approval, make any
                         amendment that requires shareholder approval pursuant
                         to Section 162(m) or 422 of the Code (and the Board
                         of Directors has determined that compliance with
                         Section 422 of the Code is desirable). The 1998
                         Equity Compensation Plan will terminate on the date
                         immediately preceding the tenth anniversary of its
                         effective date, unless terminated earlier by the
                         Board of Directors or extended by the Board of
                         Directors with approval of the shareholders.
                            Adjustment Provisions. In the event of certain
                         transactions identified in the 1998 Equity
                         Compensation Plan, the Committee may appropriately
                         adjust: (i) the maximum number of Shares available
                         for Grants and the individual Share limits, (ii) the
                         number of Shares covered by outstanding Grants, (iii)
                         the kind of Shares issued under the 1998 Equity
                         Compensation Plan and (iv) the price per share or
                         market value of Grants, and such adjustments will be
                         effective and binding for all purposes of the 1998
                         Equity Compensation Plan.
                            Change of Control of the Company. In the event of
                         a change of control, unless the Board of Directors
                         determines otherwise, all Options, restricted stock
                         and SARs will become fully vested, and grantees
                         holding performance units will receive a pro-rata
                         payment in settlement of the units based on the
                         target payment for the performance period and the
                         portion of the performance period that precedes the
                         change of control.
                            A change of control occurs if (i) any person
                         (other than Alfred P. West, Jr.) becomes a beneficial
                         owner of more than 30% of the voting power of the
                         Company's securities, (ii) the shareholders of the
                         Company approve (or, if shareholder approval is not
                         required, the Board approves) an agreement providing
                         for the liquidation or the sale of substantially all
                         the Company's assets, (iii) the shareholders of the
                         Company approve (or, if shareholder approval is not
                         required, the Board approves) an agreement providing
                         for the merger or consolidation of the Company with
                         any other corporation where the shareholders of the
                         Company immediately before
 
25
<PAGE>
 
                         the transaction will not own more than 50% of the
                         voting power of all securities of the Company
                         immediately after the merger, (iv) any person (other
                         than the Company) has commenced a tender offer or
                         exchange offer for 30% or more of the voting power of
                         the then outstanding Shares of the Company, or (v) at
                         least a majority of the Board does not consist of
                         individuals who were elected, or nominated for
                         election, by the directors in office at the time of
                         such election or nomination.
                            Federal Income Tax Consequences. The current
                         federal income tax treatment of Grants under the 1998
                         Equity Compensation Plan is generally described
                         below. Local and state tax authorities may also tax
                         incentive compensation awarded under the 1998 Equity
                         Compensation Plan, and tax laws are subject to
                         change. Participants are urged to consult with their
                         personal tax advisors concerning the application of
                         the general principles discussed below to their own
                         situations and the application of state and local tax
                         laws.
                            There are no federal income tax consequences to a
                         participant or to the Company upon the grant of an
                         NQSO under the 1998 Equity Compensation Plan.
                         Generally, upon the exercise of an NQSO, a
                         participant will recognize ordinary compensation
                         income in an amount equal to the excess of the fair
                         market value of the shares at the time of exercise
                         over the exercise price of the NQSO, and the Company
                         generally will be entitled to a corresponding federal
                         income tax deduction. Upon the sale of shares
                         acquired by the exercise of an NQSO, a participant
                         will have a capital gain or loss in an amount equal
                         to the difference between the amount realized upon
                         the sale and the participant's adjusted tax basis in
                         the shares (the exercise price plus the amount of
                         ordinary income recognized by the participant at the
                         time of exercise of the NQSO). The capital gain tax
                         rate will depend on the length of time the shares are
                         held and certain other factors.
                            A participant who is granted an ISO will not
                         recognize taxable income for purposes of the regular
                         income tax, upon either the grant or exercise of the
                         ISO. However, for purposes of the alternative minimum
                         tax imposed under the Code, in the year in which an
                         ISO is exercised, the amount by which the fair market
                         value of the shares acquired upon
 
26
<PAGE>
 
                         exercise exceeds the exercise price will be treated
                         as an item of adjustment and included in the
                         computation of the recipient's alternative minimum
                         taxable income in the year of exercise. A participant
                         who disposes of the shares acquired upon exercise of
                         an ISO after two years from the date the ISO was
                         granted and after one year from the date such shares
                         were transferred to him or her upon exercise of the
                         ISO will recognize capital gain or loss in the amount
                         of the difference between the amount realized on the
                         sale and the exercise price (or the participant's
                         other tax basis in the shares), and the Company will
                         not be entitled to any tax deduction by reason of the
                         grant or exercise of the ISO. The capital gain tax
                         rate will depend on the length of time the shares are
                         held and certain other factors.
                            As a general rule, if a participant disposes of
                         the shares acquired upon exercise of an ISO before
                         satisfying both holding period requirements (a
                         "disqualifying disposition"), his or her gain
                         recognized on such a disposition will be taxed as
                         ordinary income to the extent of the difference
                         between the fair market value of such shares on the
                         date of exercise and the exercise price, and the
                         Company will be entitled to a deduction in that
                         amount. The gain, if any, in excess of the amount
                         recognized as ordinary income on such a disqualifying
                         disposition will be capital gain, depending upon the
                         length of time the participant held his or her shares
                         prior to the disposition and certain other factors.
                            A participant normally will not recognize taxable
                         income upon receiving restricted stock, and the
                         Company will not be entitled to a deduction, until
                         such stock is transferable by the participant or no
                         longer subject to a substantial risk of forfeiture
                         for federal tax purposes, whichever occurs earlier.
                         When the stock is either transferable or is no longer
                         subject to a substantial risk of forfeiture, the
                         participant will recognize ordinary compensation
                         income in an amount equal to the fair market value of
                         the shares (less any amounts paid for such shares) at
                         that time, and the Company will be entitled to a
                         deduction in the same amount. A participant may,
                         however, elect to recognize ordinary compensation
                         income in the year the restricted stock is awarded in
                         an amount equal to the fair market value of the
                         shares subject to the restricted stock Grant
 
27
<PAGE>
 
                         (less any amounts paid for such shares) at that time,
                         determined without regard to the restrictions. In
                         such event, the Company generally will be entitled to
                         a corresponding deduction in the same year. Any gain
                         or loss recognized by the participant upon subsequent
                         disposition of the shares will be capital gain or
                         loss.
                            There are no federal income tax consequences to a
                         participant or to the Company upon the grant of an
                         SAR under the 1998 Equity Compensation Plan. Upon the
                         exercise of an SAR, if the participant receives the
                         appreciation inherent in the SAR in cash, the
                         participant will recognize ordinary compensation
                         income in an amount equal to the cash received. If
                         the participant receives the appreciation in shares,
                         the participant will recognize ordinary compensation
                         income in an amount equal to the fair market value of
                         the shares received. The Company generally will be
                         entitled to a corresponding federal income tax
                         deduction at the time of the exercise of the SAR.
                         Upon the sale of any shares acquired by the exercise
                         of an SAR, a participant will have a capital gain or
                         loss (the capital gain tax rate will depend on the
                         length of time the shares were held and certain other
                         factors) in an amount equal to the difference between
                         the amount realized upon the sale and the
                         participant's adjusted tax basis in the shares (the
                         amount of ordinary income recognized by the
                         participant at the time of exercise of the SAR).
                            There are no federal income tax consequences to a
                         participant or to the Company upon the grant of
                         performance units under the 1998 Equity Compensation
                         Plan. If the participant receives payment of the
                         performance units in cash, the participant will
                         recognize ordinary compensation income in an amount
                         equal to the cash received. If the participant
                         receives payment of the performance units in shares,
                         the participant will recognize ordinary compensation
                         income in an amount equal to the fair market value of
                         the shares received. The Company generally will be
                         entitled to a corresponding federal income tax
                         deduction at the time of the payment of the
                         performance units. Upon the sale of any shares
                         acquired upon payment of the performance units, a
                         participant will have a capital gain or loss (the
                         capital gain tax rate will depend upon the
 
28
<PAGE>
 
                         length of time the shares were held and certain other
                         factors) in an amount equal to the difference between
                         the amount realized upon the sale and the
                         participant's adjusted tax basis in the shares (the
                         amount of ordinary income recognized by the
                         participant at the time of the payment of the
                         performance units).
                            The Company's income tax deduction in any of the
                         foregoing cases may be limited by the $1,000,000
                         limit of Section 162(m) of the Code if the Grant does
                         not qualify as "qualified performance-based
                         compensation" under Section 162(m) of the Code (see
                         "Section 162(m)" above).
                            Tax Withholding. The Company has the right to
                         deduct from all Grants paid in cash or from other
                         wages paid to an employee of the Company, any
                         federal, state or local taxes required by law to be
                         withheld with respect to Grants, and the participant
                         or other person receiving shares under the 1998
                         Equity Compensation Plan will be required to pay to
                         the Company the amount of any such taxes which the
                         Company is required to withhold with respect to such
                         shares. A participant may elect to satisfy the
                         Company's income tax withholding obligation by
                         withholding shares received from the exercise of a
                         stock option or SAR or a restricted stock or
                         performance unit Grant.
                            1998 Equity Compensation Plan Benefits. The
                         following table sets forth certain benefits related
                         to the 1998 Equity Compensation Plan. Other than
                         automatic grants of NQSOs to directors who are not
                         employees of the Company as set forth below, future
                         awards under the 1998 Equity Compensation Plan are
                         not determinable because grants are made at the
                         discretion of the Committee. No grants have been made
                         as of the date hereof under the 1998 Equity
                         Compensation Plan. As of April 7, 1998, the closing
                         price of the Company's Shares reported on the Nasdaq
                         National Market System was $66.00 per share.
 
 
29
<PAGE>
 
                                           NEW PLAN BENEFITS
                         SEI INVESTMENTS COMPANY 1998 EQUITY COMPENSATION PLAN
 
<TABLE>
<CAPTION>
                                                               NUMBER OF SHARES
                                                                  SUBJECT TO
                                                                 NONQUALIFIED
                     NAME AND POSITION                          STOCK OPTIONS
                ---------------------------------------------------------------
                <S>                                            <C>
                Non-Executive Director Group/(1)/.............      8,000
                ---------------------------------------------------------------
</TABLE>
 
                         (1) Assumes election to the Board of Directors at the
                             1998 Annual Meeting of the individuals nominated
                             by the Board of Directors.
 
      (Proposal No. 3)   APPROVAL OF THE SEI INVESTMENTS COMPANY EMPLOYEE
                         STOCK PURCHASE PLAN, AS AMENDED AND RESTATED
 
                         At the Annual Meeting, there will be presented to the
                         shareholders a proposal to approve the adoption of
                         the SEI Investments Company Employee Stock Purchase
                         Plan, as amended and restated (the "Employee Stock
                         Purchase Plan") (formerly the SEI Corporation
                         Employee Stock Purchase Plan). On October 15, 1997
                         and on April 23, 1998, subject to shareholder
                         approval as indicated below, the Board of Directors
                         amended the Employee Stock Purchase Plan to reflect
                         the changes described below. The Board of Directors
                         also approved the Employee Stock Purchase Plan, as
                         amended and restated, to reflect such changes.
                            Under the proposal, changes to the Employee Stock
                         Purchase Plan that are subject to shareholder
                         approval are: (i) an increase in the number of Shares
                         available under the Employee Stock Purchase Plan,
                         from 800,000 Shares to 1,300,000 Shares; (ii) a
                         change in the definition of "compensation" from that
                         of base pay to total compensation and the elimination
                         of the 10% cap (in favor of a 100% cap) on
                         compensation that may be subject to purchases of
                         Shares under the Employee Stock Purchase Plan
                         (however, the $25,000 annual cap on purchases under
                         the Plan continues to apply); (iii) the elimination
                         of the shareholder approval requirement for
                         amendments to the Employee Stock Purchase Plan that
                         materially increase benefits for participants; and
                         (iv) the extension of the expiration date of the
                         Employee Stock Purchase Plan from January 1, 2001 to
                         May 20, 2008. Other changes to the Employee Stock
                         Purchase Plan
 
30
<PAGE>
 
                         include: (i) the addition of a lump sum payment
                         option to purchase Shares under the Employee Stock
                         Purchase Plan and (ii) changes in the name of the
                         Employee Stock Purchase Plan and any references to
                         the Company in the Employee Stock Purchase Plan to
                         reflect the change in the name of the Company.
                            The Board of Directors believes that the foregoing
                         changes will enable the Employee Stock Purchase Plan
                         to better fulfill its stated purpose of providing
                         eligible employees of the Company and its
                         participating subsidiaries who wish to become
                         shareholders or to increase their existing share
                         holdings, an opportunity to purchase Shares, to the
                         mutual benefit of both the employees and the Company.
                         The principal terms of the Employee Stock Purchase
                         Plan are discussed below.
                            THE AFFIRMATIVE VOTE OF A MAJORITY OF THE VOTES
                         CAST AT THE 1998 ANNUAL MEETING BY THE HOLDERS OF
                         OUTSTANDING SHARES IS REQUIRED TO APPROVE THE AMENDED
                         AND RESTATED EMPLOYEE STOCK PURCHASE PLAN. THE BOARD
                         OF DIRECTORS UNANIMOUSLY RECOMMENDS THAT THE
                         SHAREHOLDERS VOTE FOR APPROVAL OF THIS PROPOSAL.
 
                         DESCRIPTION OF THE EMPLOYEE STOCK PURCHASE PLAN
 
                         The Employee Stock Purchase Plan provides eligible
                         employees of the Company and participating
                         subsidiaries with a means to purchase, through
                         payroll deductions, Shares at a discount, consistent
                         with the provisions of the Code. Beginning on October
                         15, 1997, the Employee Stock Purchase Plan also
                         permitted eligible employees to purchase Shares with
                         a lump sum payment. The Company intends to file a
                         registration statement on Form S-8 to register the
                         additional Shares reserved for issuance pursuant to
                         the Employee Stock Purchase Plan if the Employee
                         Stock Purchase Plan, as amended and restated, is
                         approved by the shareholders.
                            General. The Employee Stock Purchase Plan, as
                         amended and restated, increases the number of Shares
                         available under the Employee Stock Purchase Plan from
                         800,000 to 1,300,000, subject to adjustment in the
                         event of a reclassification, subdivision, split-up,
                         spin-off, stock dividend, exchange, or other increase
                         or decrease in the number of issued Shares.
 
31
<PAGE>
 
                            Eligible Participants. Employees of the Company
                         and participating subsidiaries are eligible to
                         participate in the Employee Stock Purchase Plan, if
                         their customary employment is for more than 20 hours
                         per week and for more than five months per year. An
                         employee who owns five percent (5%) or more of the
                         total combined voting power or value of all classes
                         of stock of the Company or a participating subsidiary
                         will not be eligible to participate in the Employee
                         Stock Purchase Plan. As of April 7, 1998, 1,088
                         employees were eligible to participate in the
                         Employee Stock Purchase Plan. It is not possible to
                         determine how many eligible employees will
                         participate in the Employee Stock Purchase Plan in
                         the future or the level of any such participation.
                            Share Purchases. Pursuant to an eligible
                         employee's election, Shares are purchased through
                         payroll deductions at a stated dollar amount or
                         percentage of compensation elected by the eligible
                         employee that is not less than 1% of his or her
                         compensation per pay period and currently, is not
                         more than 10% of such compensation. The amended and
                         restated Employee Stock Purchase Plan eliminates the
                         10% cap on an eligible employee's compensation and
                         permits an eligible employee to make one lump sum
                         payment of not less than $25 per purchase period to
                         purchase Shares under the Employee Stock Purchase
                         Plan.
                            Compensation is currently defined under the
                         Employee Stock Purchase Plan as regular salary,
                         wages, and commissions paid, during the period of
                         reference, to an employee by the Company or a
                         participating subsidiary, including the employee's
                         401(k) plan elective deferrals, but excluding
                         bonuses, overtime payments, shift differential
                         payments, other special compensation, and any amounts
                         accrued for the benefit of an employee but not paid
                         during the period of reference. The Employee Stock
                         Purchase Plan, as amended and restated, defines
                         compensation as wages and other compensation paid
                         during the period of reference that is reported on
                         Form W-2, and the employee's 401(k) plan and 125 plan
                         elective deferrals.
 
32
<PAGE>
 
                            Shares are purchased in whole shares at a price
                         equal to 85% of the market value of a Share on the
                         last business day of each purchase period. The market
                         value of a Share is the last reported sale price of a
                         Share on the Nasdaq National Market System. No
                         employee is permitted to purchase Shares under the
                         Employee Stock Purchase Plan which in the aggregate
                         exceed $25,000 of the market value of such Shares
                         determined on the last day of each purchase period in
                         any calendar year.
                            Each eligible employee who elects to participate
                         in the Employee Stock Purchase Plan will, without any
                         action on his or her part, automatically be deemed to
                         have exercised his or her right to purchase Shares on
                         the last day of each purchase period, to the extent
                         that the amount withheld through payroll deduction
                         throughout the purchase period or paid through a lump
                         sum is sufficient to purchase, at the purchase price,
                         one or more whole Shares. A right to purchase Shares
                         under the Employee Stock Purchase Plan is not
                         transferable by an employee other than by will or by
                         the laws of descent and distribution and is
                         exercisable during his or her lifetime only by the
                         employee.
                            Suspension and Changes in Participation. An
                         employee may voluntarily suspend his or her
                         participation in the Employee Stock Purchase Plan
                         within the timeframe established by the
                         Administrative Committee (as defined below), but in
                         any event within a reasonable time prior to the last
                         business day of a purchase period. Within 60 days
                         after such suspension, the employee will be paid the
                         amount of any payroll deductions or lump sum payments
                         credited to the employee under the Employee Stock
                         Purchase Plan. An employee may resume participation
                         effective as of the first day of the first purchase
                         period reasonably possible after the date the
                         Administrative Committee receives the eligible
                         employee's notice of participation. An employee may
                         change the rate or amount of his or her payroll
                         deductions within the timeframe established by the
                         Administrative Committee, but in any event within a
                         reasonable time prior to the first day of a purchase
                         period.
                            Generally, if an employee terminates his or her
                         employment with the Company or ceases to be an
                         eligible employee, the total amount of the
 
33
<PAGE>
 
                         employee's payroll deductions and lump sum payments
                         made under the Employee Stock Purchase Plan up to the
                         date of his or her termination of employment or
                         cessation of eligibility will be used to purchase
                         whole Shares under the Plan as of the last business
                         day of the current or next purchase period, as
                         applicable, and any balance will be refunded to the
                         employee.
                            Since the purpose of the Employee Stock Purchase
                         Plan is to enable eligible employees to become
                         shareholders of the Company, Shares purchased under
                         the Employee Stock Purchase Plan are intended to be
                         held by the employee as a long-term investment. The
                         Administrative Committee, in its sole discretion, may
                         exclude from participation any employee who purchases
                         Shares and, other than in isolated cases, sells the
                         Shares in violation of this purpose of the Employee
                         Stock Purchase Plan. Once excluded from participation
                         under these circumstances, an eligible employee will
                         only be readmitted with the consent of the
                         Administrative Committee.
                            All funds received or held by the Company under
                         the Employee Stock Purchase Plan are general assets
                         of the Company, free of any trust or other
                         restriction, and may be used for any corporate
                         purpose. No interest on such funds will be credited
                         to or paid to any participant under the Employee
                         Stock Purchase Plan.
                            Plan Administration and Termination. The Employee
                         Stock Purchase Plan provides for administration of
                         the Plan by a committee appointed by the Board of
                         Directors (the "Administrative Committee"). The Board
                         of Directors may terminate, suspend or amend the Plan
                         in any respect at any time, except that the approval
                         of the Company's shareholders is required for any
                         amendment that increases the number of Shares
                         available for purchase under the Plan, allows any
                         person who is not an eligible employee (as described
                         above) to become a participant in the Employee Stock
                         Purchase Plan or materially increases the benefits
                         accruing to participants under the Employee Stock
                         Purchase Plan. The Employee Stock Purchase Plan, as
                         amended and restated, eliminates the requirement that
                         the Board of Directors seek shareholder approval
                         prior to amending
 
34
<PAGE>
 
                         the Employee Stock Purchase Plan to otherwise
                         materially increase the benefits accruing to
                         participants or to provide for purchase periods of
                         less than one calendar month or longer than 12
                         calendar months or provide for overlapping purchase
                         periods.
                            If approved by shareholders, the Employee Stock
                         Purchase Plan, as amended and restated, will
                         generally be effective on May 21, 1998 and, unless
                         earlier terminated, will continue in effect through
                         May 20, 2008, except that if at the end of any
                         purchase period the aggregate funds available for the
                         purchase of Shares would purchase a greater number of
                         Shares than is available for purchase, the number of
                         Shares that would otherwise be purchased by each
                         participant at the end of the purchase period will be
                         proportionately reduced in order to eliminate the
                         excess. The Employee Stock Purchase Plan would then
                         automatically terminate after such purchase period.
                            Tax Treatment. The current federal income tax
                         treatment of Shares purchased under the Employee
                         Stock Purchase Plan is generally described below.
                         Local and state tax authorities may also tax Shares
                         purchased under the Employee Stock Purchase Plan, and
                         tax laws are subject to change. Participants are
                         urged to consult with their personal tax advisors
                         concerning the application of the general principles
                         discussed below to their own situations and the
                         application of state and local tax laws.
                            The Employee Stock Purchase Plan is intended to
                         qualify as an employee stock purchase plan within the
                         meaning of Section 423 of the Code, and it is
                         intended to comply also with the provisions of
                         Section 421 of the Code and the rules and regulations
                         issued thereunder.
                            Under the Code as currently in effect, a
                         participant will not be deemed to have recognized
                         income, nor will the Company be entitled to a
                         deduction, upon the participant's acquisition of
                         Shares pursuant to the Employee Stock Purchase Plan.
                         A participant who acquires shares under
 
35
<PAGE>
 
                         the Employee Stock Purchase Plan will recognize
                         income when he or she sells or otherwise disposes of
                         such shares.
                            If a participant sells shares acquired under the
                         Employee Stock Purchase Plan more than two years
                         after the date on which the right to purchase the
                         shares was granted and more than one year after the
                         purchase of the shares (the "statutory holding
                         period"), a portion of the participant's gain will be
                         ordinary income and a portion will be capital gain.
                         The participant will be taxed at ordinary income tax
                         rates on the excess of the value of the shares when
                         the option was granted over the purchase price, or,
                         if less, the entire gain on the sale. The participant
                         will have additional capital gain or loss equal to
                         the difference, if any, between the proceeds of the
                         sale and the participant's basis in the shares (the
                         purchase price plus any ordinary income realized).
                         The capital gain rate will depend on how long the
                         stock is held by the participant and certain other
                         factors. The Company will not be entitled to any tax
                         deduction with respect to a sale by a participant
                         after the statutory holding period.
                            If a participant sells shares before the
                         expiration of the statutory holding period, the
                         participant generally will be taxed at ordinary
                         income tax rates to the extent that the value of the
                         shares when the shares were purchased exceeded the
                         purchase price. The Company will be entitled to a
                         corresponding deduction. The participant will have
                         additional capital gain or loss on the difference
                         between the proceeds of the sale and the
                         participant's basis in the shares (the purchase price
                         plus any ordinary income realized). The capital gain
                         rate will depend on how long the stock is held by the
                         participant and certain other factors.
                            The estate of a participant who dies while holding
                         shares acquired under the Employee Stock Purchase
                         Plan will recognize ordinary income in the year of
                         the participant's death equal to the excess of the
                         value of the shares when the option was granted over
                         the purchase price, or, if less, the amount by which
                         the fair market value of the shares at the date of
                         death exceeds the purchase price.
 
 
36
<PAGE>
 
      (Proposal No. 4)
                         RATIFICATION OF SELECTION OF AUDITORS
 
                         The Board of Directors has appointed Arthur Andersen
                         LLP, independent public accountants, to be the
                         Company's auditors for 1998. Although not required to
                         do so, the Board of Directors has determined that it
                         would be desirable to request ratification of this
                         appointment by the holders of Shares of the Company.
                         If such ratification is not received, the Board of
                         Directors will reconsider the appointment.
                         Representatives of Arthur Andersen LLP are expected
                         to be available at the 1998 Annual Meeting to respond
                         to appropriate questions and to make a statement if
                         they so desire.
                            THE AFFIRMATIVE VOTE OF A MAJORITY OF THE VOTES
                         CAST AT THE 1998 ANNUAL MEETING BY THE HOLDERS OF THE
                         OUTSTANDING SHARES IS REQUIRED FOR THE RATIFICATION
                         OF THIS SELECTION. THE BOARD OF DIRECTORS UNANIMOUSLY
                         RECOMMENDS THAT THE SHAREHOLDERS VOTE FOR APPROVAL OF
                         THIS PROPOSAL.
 
                         OTHER MATTERS
 
                         As of the date of this Proxy Statement, management
                         knows of no other matters to be presented for action
                         at the 1998 Annual Meeting. However, if any further
                         business should properly come before the 1998 Annual
                         Meeting, the persons named as proxies in the
                         accompanying proxy card will vote on such business in
                         accordance with their best judgment.
 
                         SOLICITATION OF PROXIES
 
                         The accompanying proxy card is solicited on behalf of
                         the Board of Directors of the Company. Following the
                         original mailing of the proxy materials, proxies may
                         be solicited personally by officers and employees of
                         the Company, who will not receive additional
                         compensation for these services. The Company will
                         reimburse banks, brokerage firms, and other
                         custodians, nominees and fiduciaries for reasonable
                         expenses incurred by them in sending proxy material
                         to beneficial owners of Shares.
 
 
37
<PAGE>
 
                         PROPOSALS OF SHAREHOLDERS
 
                         Proposals which shareholders intend to present at the
                         next annual meeting of Shareholders of the Company
                         must be received by the Secretary of the Company at
                         its principal offices (Oaks, PA 19456-1100) no later
                         than December 26, 1998.
 
                         ADDITIONAL INFORMATION
 
                         The Company will provide without charge to any person
                         from whom a proxy is solicited by the Board of
                         Directors, upon the written request of such person, a
                         copy of the Company's 1997 Annual Report on Form
                         10-K, including the financial statements and
                         schedules thereto, required to be filed with the
                         Securities and Exchange Commission pursuant to Rule
                         13a-1 under the Securities Exchange Act of 1934, as
                         amended. Such written requests should be directed to
                         Murray A. Louis, Vice President, at the Company's
                         principal offices.
 
38
<PAGE>
 








                        SEI
                          Investments  Oaks, PA 19456




<PAGE>

- --------------------------------------------------------------------------------
 
PROXY                       SEI INVESTMENTS COMPANY                      PROXY

          This proxy is solicited on behalf of the Board of Directors

     The undersigned shareholder of SEI Investments Company (the "Company")
hereby appoints Kevin P. Robins, Sandra K. Orlow and Lydia A. Gavalis, or any of
them (with full power to act alone in the absence of the other and with full
power of substitution in each), the proxy or proxies of the undersigned, and
hereby authorizes any of them to represent and to vote as designated on the
reverse, all Shares of Common Stock of the Company held of record by the
undersigned at the close of business on April 7, 1998, at the Annual Meeting of
Shareholders to be held on May 21, 1998, and at any adjournments thereof.

                 (CONTINUED AND TO BE SIGNED ON REVERSE SIDE)
 

<PAGE>
 
 
                       Please date, sign and mail your 
                     proxy card back as soon as possible!

                        Annual Meeting of Shareholders
                            SEI INVESTMENTS COMPANY

                                 May 21, 1998


                Please Detach and Mail in the Envelope Provided


[X] Please mark your
    votes as in this
    example.

Please mark, sign, date, and return the proxy card promptly using the enclosed 
envelope.

(Instructions:  To withhold authority to vote for any individual nominee, strike
such nominee's name from the list of nominees.)

                      FOR ALL    WITHHOLD ALL
1.  Election of         [_]          [_]          Nominees:  Alfred P. West, Jr.
    Directors                                                William M. Doran


2.  Approval of the SEI Investments Company 1998         [_]      [_]      [_]
    Equity Compensation Plan.

3.  Approval of the SEI Investments Company Employee
    Stock Purchase Plan, as amended and restated.        [_]      [_]      [_]

4.  Ratification of the selection of Arthur Andersen     [_]      [_]      [_]
    LLP as the Company's auditors for 1998.

5.  In their discretion, the proxies are authorized to vote upon such other
    business as may properly come before the meeting or any adjournments
    thereof.

    This proxy, when properly executed will be voted in the manner directed 
herein.  If no direction is made, this proxy will be voted FOR Proposals 1, 2,
3 and 4.

CHECK HERE FOR ADDRESS CHANGE        [_]

CHECK HERE IF YOU PLAN TO ATTEND     [_]
THE MEETING


SIGNATURE(S)                                     DATE
            ----------------------------------        --------------------------

Note:  Please sign exactly as name appears hereon.  When Shares are held by 
joint tenants, all joint tenants should sign.  When signing as attorney, 
executor, administrator, trustee or guardian, please give the full title as 
such.  If a corporation, please sign in the full corporate name by the President
or other authorized officer.  If a partnership, please sign in partnership name 
by authorized person.



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