SEI CORP
10-K405, 1998-03-27
SECURITY BROKERS, DEALERS & FLOTATION COMPANIES
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<PAGE>
 
                      SECURITIES AND EXCHANGE COMMISSION

                            Washington, D.C.  20549

                               ================

                                   FORM 10-K

(Mark One)
[X]  ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE
     ACT OF 1934

For the fiscal year ended:                December 31, 1997
                           ------------------------------------------------
                                   OR

[ ] TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
    EXCHANGE ACT OF 1934

For the transition period from            to 
                               ----------    ----------

                     Commission file number     0 - 10200
                                           -------------------

                            SEI INVESTMENTS COMPANY
- -------------------------------------------------------------------------------
            (Exact name of registrant as specified in its charter)

             Pennsylvania                                23-1707341
- --------------------------------------     ------------------------------------
(State or other jurisdiction of            (IRS Employer Identification Number) 
  incorporation or organization)           

1 Freedom Valley Drive, Oaks, Pennsylvania            19456-1100
- ------------------------------------------  ----------------------------------
(Address of principal executive offices)               (Zip Code)

Registrant's telephone number, including
area code                                              610-676-1000
                                            -----------------------------------

Securities registered pursuant to Section 12(b) of
the Act:

                                             Name of Each Exchange on Which
        Title of Each Class                             Registered
- -----------------------------------------   -----------------------------------
                None

Securities registered pursuant to Section 12(g) of the Act:

                     Common Stock, par value $.01 per share
- -------------------------------------------------------------------------------
                                  (Title of class)

Indicate by check mark whether the registrant (1) has filed all reports required
to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during
the preceding 12 months (or for such shorter period that the registrant was
required to file such reports), and (2) has been subject to such filing
requirements for the past 90 days.  Yes  X   No
                                        ---     ---

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405
of Regulation S-K is not contained herein, and will not be contained, to the
best of registrant's knowledge, in definitive proxy or information statements
incorporated by reference in Part III of this Form 10-K or any amendment to this
Form 10-K. [X]

                           (Cover page 1 of 2 pages)

                           Exhibit Index on page 53
                              Page 1 of 116 pages

                                       1
<PAGE>
 

State the aggregate market value of the voting stock held by non-affiliates of
the registrant based on the closing price of such stock as reported by NASDAQ as
of February 28, 1998:  $704,754,941.  For purposes of making this calculation
only, registrant has defined affiliates as including all directors and
beneficial owners of more than ten percent of the common stock of the
registrant.

       APPLICABLE ONLY TO REGISTRANTS INVOLVED IN BANKRUPTCY PROCEEDINGS
                       DURING THE PRECEDING FIVE YEARS:

Indicate by check mark whether the registrant has filed all documents and
reports required to be filed by Section 12, 13, or 14(d) of the Securities
Exchange Act of 1934 subsequent to the distribution of securities under a plan
confirmed by a court.
Yes              No
    ___________     ___________


                   APPLICABLE ONLY TO CORPORATE REGISTRANTS:

Indicate the number of shares outstanding of each of the registrant's classes of
common stock, as of February 28, 1998:  17,729,912.


                     DOCUMENTS INCORPORATED BY REFERENCE:

Portions of the following documents are incorporated by reference herein:

     1.  Notice of and Proxy Statement for the 1998 Annual Meeting of
         Shareholders to be filed within 120 days after the end of the fiscal
         year covered by this annual report, incorporated by reference in Part
         III hereof.

                           (Cover page 2 of 2 pages)


                                       2
<PAGE>
 
                                    PART I
                                    ------

Item 1.  Business.
         --------

General Development of Business
- -------------------------------

SEI Investments Company ("SEI" or the "Company") was incorporated in
Pennsylvania in 1968.  SEI Investments Distribution Company ("SIDCO"), formerly
known as SEI Financial Services Company, SEI Investments Management Corporation
("SIMC"), formerly known as SEI Financial Management Corporation, and SEI Trust
Company ("SEI Trust") are the principal wholly owned subsidiaries of the
Company.  SIDCO is a broker-dealer registered with the Securities and Exchange
Commission ("SEC") under the Securities Exchange Act of 1934 and is a member of
the National Association of Securities Dealers, Inc.  SIMC is an investment
advisor registered with the SEC under the Investment Advisers Act of 1940. SEI
Trust is a trust entity chartered in the Commonwealth of Pennsylvania.

At the time of the Company's initial public offering in March 1981, the
Company's principal business activity was providing an on-line, real-time
accounting and management information system to bank trust departments.
Beginning in 1982, the Company, through SIDCO and SIMC, expanded its trust
product line by sponsoring a number of institutional investment products,
primarily in the form of registered investment companies sold to SEI clients and
other institutional investors and financial intermediaries.

In 1983, the Company, through SIDCO, entered the pension and investment
consulting business by acquiring the Funds Evaluation Division of A.G. Becker
Paribas, Inc. and began providing a comparative investment performance
evaluation service to tax-exempt fund sponsors and institutional money managers.
In 1986, the Company, through an additional acquisition, began providing
evaluation services to Canadian fund sponsors and money managers.   In 1995, the
Company decided to exit its U.S. consulting business and subsequently sold its
Capital Resources Division ("CR") as of December 31, 1997 (See Note 2 of the
Notes to Consolidated Financial Statements).  The Company has retained its
Canadian pension and investment advisor consulting business.

In 1989, the Company acquired National FSI, Inc., which eventually became SEI
Defined Contribution Retirement Services ("DC"), a division of SIMC.  DC
provided administrative and processing services and software services for use by
employee benefit plans.  In 1996, the Company completed the transfer of the
processing services provided by DC to a third party and at December 31, 1996,
the Company wrote off its entire interest in DC (See Note 2 of the Notes to
Consolidated Financial Statements).

In 1990, SIDCO and SIMC began providing a full range of administration and
distribution services to proprietary mutual funds established for banks and
other financial institutions and intermediaries.  The client serves as the
investment advisor for the proprietary funds, and the funds are sold primarily
to customers of the client.

In 1991, the Company began to offer various asset management services to
institutional investors.  These services included programs created to help
institutional investors establish investment objectives and asset allocation
strategies, and to gain access to top-quality investment managers.  Beginning in
1992, the Company began offering its asset management services to high-net-worth
individuals and small defined contribution and benefit plans through selected
financial intermediaries.

In 1994, the Company, through SEI Trust, began offering complete back-office
accounting and processing services to trust institutions which allows them to
outsource their trust operations and related investment functions.

In 1995, the Company began to expand its asset management services outside the
United States by targeting selected foreign markets in which the Company could
tailor its investment management programs to institutional investors and high-
net-worth individuals.

                                       3
<PAGE>
 
Industry Segments
- -----------------

The Company is organized around its two primary business lines: Investment
Technology and Services and Asset Management.  The Investment Technology and
Services segment, which accounted for 62 percent of the Company's consolidated
revenues in 1997, includes the following products and services: TRUST 3000
product line, proprietary funds administration and distribution services, and
trust back-office processing.  The Asset Management segment, which accounted for
38 percent of the Company's consolidated revenues in 1997, consists of the
global distribution of the Company's asset management products to the
institutional and high-net-worth markets.

Financial information about the Company's business segments is contained in Note
12 of the Notes to Consolidated Financial Statements in Item 8.  Additional
financial information and discussion about the Company's business segments,
including a breakdown of the Company's revenues by product line, is contained in
Management's Discussion and Analysis of Financial Condition and Results of
Operations in Item 7.

Investment Technology and Services

     Trust Technology Services


The Company, through SIMC, provides trust and investment accounting and
management information services as an outsourcer to financial institutions with
its TRUST 3000 product line.  TRUST 3000 is a complete trust accounting and
investment system with fully automated securities movement and control linked
directly to the Depository Trust Company.  TRUST 3000 offers investment
management functionality through a number of integrated products and sub-systems
that supports investment accounting, client administration, portfolio analysis,
and trade order processing for both domestic and global securities processing.
TRUST 3000 also provides access to multiple third-party pricing and asset
related information. The TRUST 3000 product line allows clients to choose the
processing alternatives that best suit their business needs.  The Company
provides trust and investment processing services through a state-of-the-art
data communications network which is internally managed.  Clients utilize
terminals and workstations which are connected through this network to access
the Company's data center.

The value of the TRUST 3000 product line has been further enhanced by the
introduction of the Company's StrataQuest product line.  StrataQuest is a
flexible combination of modular workstation application products that transform
data into user-friendly customer service and investment analysis desktop
applications.  StrataQuest also provides technology platform products that
manage the flow of data and allow for the integration of TRUST 3000 information
with other financial institution systems in an open systems architecture.  This
product provides standard, efficient, and reliable interfaces that update and
retrieve TRUST 3000 information from any application operating in the customer's
distributed computing environment.

SEI's market for its trust accounting and management information services
consists primarily of bank trust departments managing assets between $10 million
and $100 billion.  The Company believes that there are approximately 1,500 trust
departments of this size.  At December 31, 1997, the Company was providing
processing or software services to approximately 110 trust departments,
including trust departments of 36 of the top 100 banks, located in 37 states,
the District of Columbia, and Canada.  The Company segregates the trust
accounting and information services market by trust assets under management: $20
billion or more in managed assets; $750 million to $20 billion in managed
assets; and under $750 million in managed assets.  Each of these three trust
accounting and management information services markets are characterized by
different pricing, service, and product parameters.  SEI endeavors to offer a
full range of products and services suitable for each.  Customers generally
contract for terms of three to five years and revenues are based on monthly
processing and software application service fees.

                                       4
<PAGE>
 
Principal competitors of the Company's trust accounting and processing services
are Fidelity-Trust Technology Services LLC, SunGard Data Systems, and Marshall
and Isley.  In addition, numerous financial institutions operate their own trust
processing systems.  The Company believes that in terms of both revenues and
number of clients served, its TRUST 3000 product is the leading trust accounting
and management system sold by third-party vendors to bank trust departments.
The Company believes that, with regard to its TRUST 3000 product line, the most
important factors in a potential customer's evaluation and choice of vendor are:
product and service reliability; security and risk; functional capability; ease
of use and future flexibility; value; and cost effectiveness.  A vendor's
experience in, and commitment to, the financial industry is also considered.
Revenues from trust technology services accounted for approximately 35 percent
of the Company's consolidated revenues in 1997.

      Trust Back-Office Processing

In 1994, the Company began to extend its trust technology line by offering trust
back-office processing. Through SEI Trust, the Company provides a fully
integrated custody and back-office outsourcing solution to trust organizations.
By combining its TRUST 3000 product line with sophisticated global investment
products and back-office capabilities, SEI Trust can offer a total outsourcing
solution.  This level of outsourcing provides trust institutions with access to
the industry's state-of-the-art accounting system, along with processing,
reporting, and custody services provided through the specialized capabilities of
SEI Trust personnel.  SEI Trust automates and centralizes all of the client's
trust accounting, income collections, securities settlement, and securities
processing functions.  In addition, SEI Trust prepares and processes customer
statements, investment reviews, and employee benefit accrual reports and
remittances to the clients' customers.

Initially, community banks were the target market for this product.  However, as
the concept of outsourcing has gained credibility and acceptance within the
industry, the customer base for these products and services has expanded to
include both small and large banks.  The Company believes that the market for
its outsourcing solution consists primarily of bank trust departments ranging in
size from start-ups to those managing assets of $10 billion, and selected
business lines of trust departments up to $100 billion in assets.  SEI Trust's
current contracts span from start-up trust companies to a $50 billion trust
department.  The term of the contracts varies from three to five years.  At
December 31, 1997, SEI Trust had contracts to perform back-office processing
services to 49 clients.

The major strategic issue facing this product line is the continued
consolidation of the banking industry, which  may reduce the number of potential
bank prospects and/or eliminate customers from its user base.  Currently, the
only known competitor in this market is Marshall and Isley.  Additional
competitors can be expected over the next few years.  Revenues from trust back-
office processing is not yet material as a percentage of the Company's
consolidated revenues in 1997.

     Proprietary Fund Services

In 1990, the Company, through SIDCO and SIMC, began providing administrative and
distribution services to proprietary mutual funds for which a bank serves as the
investment advisor, and are sold primarily to clients of the bank.  Today, SEI
provides a full range of administration and distribution services to the
proprietary funds created for banks, other financial institutions, and money
managers.  Administration services offered include back-office administrative,
financial, legal and regulatory compliance, and shareholder accounting services.
Distribution services offered include marketing strategy and sales, and
wholesaler support.  SEI also assists the client in establishing both product
and program strategy.  SEI offers a multifaceted marketing program which assists
in promoting the funds at the institutional and retail levels.  At December 31,
1997, SEI provided administration and distribution services for banks, money
managers, and credit union proprietary fund complexes with assets under
administration of approximately $82.5 billion.  These complexes include various
open-end management investment companies.

                                       5
<PAGE>
 
The Company's market for its proprietary funds services and products consists
primarily of bank trust departments and investment advisors.  At the end of
1997, there were approximately 115 proprietary fund complexes that existed in
the United States.  SEI administered proprietary funds for approximately 35
clients at December 31, 1997. The Company's contracts with proprietary mutual
funds have initial terms ranging from two to five years. Principal competitors
of the Company's proprietary mutual fund services include The BISYS Group,
Federated Investors, Inc., First Data Corporation, PFPC, and State Street Bank.
The Company believes that a potential customer of its proprietary mutual fund
services considers the price of such services, the performance of its
administrative and other support services such as legal and marketing, and the
integration of such services with proprietary software provided by the Company.

In 1996, Congress signed into law legislation allowing the tax-free conversion
of common trust funds into mutual funds.  This change in legislation has created
an additional opportunity for the Company in its proprietary mutual fund
business and has already contributed to the increased amount of assets under
administration. While banks are currently prohibited by banking laws from
serving as the principal underwriter to mutual funds, legislation has been
proposed from time to time to remove this restriction. If such legislation is
passed, some banks may consider performing some or all of the services provided
by SEI themselves. In addition, consolidation in the banking industry may reduce
the number of bank proprietary fund complexes in existence. Revenues from
proprietary fund services accounted for approximately 25 percent of the
Company's consolidated revenues in 1997.

Asset Management

SEI, through SIDCO and SIMC, has created a number of investment products and
services for institutional investors and high-net-worth investors distributed
through financial intermediaries.  The initial investment products, first
distributed in 1982, were developed to meet the liquidity requirements of bank
trust departments utilizing the Company's TRUST 3000 product line.  In 1985, the
Company began offering equity, fixed income, and tax-exempt products.
Currently, the products offered by the Company include a series of Company
sponsored domestic equity, fixed income, and tax-exempt mutual funds, separate
account management, and offshore funds.  The Company employs a total investment
management approach that uses a qualitative asset allocation model and
investment strategies based upon the precepts of modern portfolio theory,
specialist sub-advisors selected and monitored by the Company, and active risk
management.

SEI, through SIMC, serves as the administrator, transfer agent, and fund
accountant for these products.  SIMC also acts as the investment advisor for
many of these products.  SIMC's investment advisory and administration contracts
are subject to renewal annually by the board of trustees of the funds.  These
contracts provide for the payment of administrative fees based on a percentage
of the average daily net assets of each fund.

     Investment Management Services

The Company began providing investment solutions to defined benefit plans,
hospitals, endowment funds, and other institutional investors in 1991.  SEI
offers such investors an integrated investment program which enables a pension
or other investment committee to outsource their investment management process
to SEI.  SEI works with each client to develop asset management strategies that
are consistent with the client's business needs and investment objectives.
Consideration is given to the client's financial and investment objectives, risk
tolerance, investment restrictions, and time horizon.  A client's strategy is
implemented through SEI's Family of Funds that employ style specific sub-
advisors.  Through technology, SEI offers its clients continuous portfolio
management and periodic reallocation of assets.  SEI's total investment
management approach provides clients with increased diversification, reduced
risk, and greater control over their portfolios.  Clients also have the ability
to access specialized money managers through separate accounts.

                                       6
<PAGE>
 
The Company also offers asset management programs tailored to meet the needs of
high-net-worth individuals (defined by the Company as individuals with over
$500,000 of investable assets) and small institutions that are marketed through
selected intermediaries such as independent broker-dealers, registered
investment advisors, financial planners, life insurance producers, and bank
trust departments.  Investment recommendations are based on one of SEI's asset
management strategies that utilize SEI's Family of Funds.  The Company's asset
management strategies offer financial intermediaries various asset allocation
models that provide diversification among investment classes and periodic
rebalancing to achieve the investor's objectives.  SEI also provides marketing
assistance, sales support, and back-office services such as custody and
recordkeeping.

At December 31, 1997, there were approximately 1,600 clients invested in the
Company's asset management programs through separate accounts or through the
Company's Family of Funds with $13.7 billion in assets invested.  The principal
competition for the Company's asset management products is from other investment
advisors and mutual fund companies.  Fees are earned as a percentage of assets
under management.  Revenues from investment management services accounted for
approximately 19 percent of the Company's consolidated revenues in 1997.


     Liquidity Management Services

Since 1982, the Company has offered liquidity products to bank trust
departments.  The Company also provides cash sweep technology, cash management
services and other financial management solutions to corporations. The Company's
cash sweep technology enables a financial institution to sweep excess balances
from demand deposit accounts into money market accounts.  Recently, the Company
began offering a complete cash management investment program, CashStrategies,
which incorporates cash flow analytics with SEI developed software to provide
corporate treasurers an effective solution in managing their cash and investment
portfolios.

The Company's liquidity products consist primarily of money market and other
short-term mutual funds and the SEI Repurchase Agreement Program ("REPO").  REPO
permits institutions to invest short-term funds in overnight and term tri-party
repurchase agreements and other overnight and short-term investment products.

Clients that use the TRUST 3000 product line can also effect purchases and
redemptions in SEI's investment products through an automated subsystem included
in the Company's TRUST 3000 system that performs daily sweeps of trust accounts
and invests the available cash in one or more of the Company's investment
products.  Other clients may purchase or redeem the Company's investment
products and retrieve information about their accounts through SEI Direct, or by
telephone orders to SIMC.

The Company's market for its liquidity products and services consists primarily
of bank trust departments, investment advisors, and corporations located in the
United States.  The number of clients using the Company's liquidity products and
services totaled approximately 550 at December 31, 1997.  Total assets invested
in the Company's liquidity funds, including REPO, totaled $17.9 billion at
December 31, 1997.

Principal competitors of the Company's liquidity products and services include
Federated Investors, Inc., Fidelity Management Corporation, Investors Fiduciary
Trust Company, and Goldman, Sachs & Co., and other mutual fund complexes that
market to institutional investors as well as individual bank proprietary and
common trust funds.  The Company believes that a potential customer of its
liquidity services business considers the price and performance of the Company's
investment products and its diverse product offerings, as well as the ease of
investment through SEI's automated sweep system, SEI Direct, and its cash sweep
technology.  Revenues from liquidity management services accounted for
approximately 8 percent of the Company's consolidated revenues in 1997.

                                       7
<PAGE>
 
     Other Investment Products and Services

The Company has several other operations that include performance measurement
and consulting services to Canadian pension plans, brokerage and clearing
services, and several other business ventures to expand the Company's asset
management business both domestically and internationally.

The Company, through its wholly owned subsidiary, SEI Inc. ("SEI Inc."),
formerly known as SEI Financial Services Limited, provides performance
evaluation and other consulting services to Canadian pension plans.  SEI Inc.
also supports money managers in managing their clients' investments through
investment performance evaluation services, as well as trading cost analysis and
marketing strategy review.  The market for the Company's consulting services
consists mostly of defined benefit plan sponsors and investment managers located
in Canada.  At December 31, 1997, the Company was providing consulting services
to approximately 370 defined benefit plan sponsors and 40 investment managers.

The Company's fund sponsor, money manager, and TRUST 3000 clients remit payment
for services rendered by SEI in cash or, subject to applicable regulatory
guidelines, by directing brokerage commissions to SIDCO or SEI Inc. through SEI-
approved clearing agents or clearing brokers.  These clients may also apply a
portion of such directed brokerage commissions to defray certain other third-
party costs.  As a result of the directed brokerage business, the Company's
revenues may be affected by changes in market trading volume or changes in
government regulations affecting directed brokerage payments.

In 1994, the Company formed a partnership with three leading academics in the
field of finance.  The partnership, LSV Asset Management ("LSV"), is a value-
oriented, contrarian money manager that offers a deep-value investment
alternative. The direct market for LSV's money management services includes
large pension fund sponsors world-wide.  In addition to managing approximately
$463 million of the Company's own mutual funds, LSV is managing approximately
$916 million of institutional assets as of December 31, 1997.

The Company also formed an asset management company in Canada in 1994, Primus
Capital Advisors Co. ("Primus").  Primus is an investment counselor/portfolio
manager offering investment advisory services to both large and small Canadian
defined benefit pension plans.  At December 31, 1997, Primus had 14 clients with
total assets under management of $261 million.

The Company is currently establishing its distribution channels in the global
asset management marketplace through various acquisitions and the startup of
several satellite offices outside the United States.  The Company offers asset
management programs and services to high-net-worth investors and institutions in
foreign countries, including pension plans, governmental organizations, and
private corporations.  At December 31, 1997, the Company had approximately $400
million of assets under management through its global asset management group.

Revenues from other investment products and services accounted for approximately
11 percent of the Company's consolidated revenues in 1997.

Marketing and Sales
- -------------------

SEI employs 26 sales representatives in its Investment Technology and Services
segment and 64 sales representatives in its Asset Management segment.  These
sales personnel operate from 16 offices located in Oaks, Pennsylvania; San
Francisco, California; Chicago, Illinois; Boston, Massachusetts; New York, New
York; Dallas, Texas; Norcross, Georgia; Toronto, Ontario; Montreal, Quebec;
Vancouver, British Columbia; Halifax, Nova Scotia; Zurich, Switzerland; Dublin,
Ireland; Johannesburg, South Africa; Causeway Bay, Hong Kong, and Buenos Aires,
Argentina.

Customers
- ---------
The Company currently serves approximately 2,500 clients.  For the year ended
December 31, 1997, no single customer accounted for more than 10 percent of the
Company's revenues in any industry segment.

                                       8
<PAGE>
 
Development of New Products and Services
- ----------------------------------------

     Software products


The Company believes that its service to existing and potential customers is
enhanced by its substantial investment in improving existing software products
and developing new products and services for the financial industry.  To sustain
and enhance its competitive position in the industry, the Company is committed
to a continuous and high level of expenditures for research and development.
The Company currently utilizes over 250 professionals dedicated to the design,
development, and enhancement of SEI products.  The Company currently releases
new products as they are completed.  The benefit to the client is frequent, more
manageable releases.  Maintenance releases occur four times each year during the
months of February, May, August, and November.

The Company's product development efforts are focused on its StrataQuest open
architecture product line.  StrataQuest allows the Company's clients to operate
in a multi-platform environment using client/server installations.  This open
architecture facilitates the development of new applications for the Company, as
well as expanding the upward functionality of its existing products to enhance
their attractiveness to the largest clients.

During 1997, 1996, and 1995, the Company expended (including amounts
capitalized) approximately $22,500,000 (7.7 percent of revenues), $26,254,000
(10.6 percent of revenues), and $16,744,000 (7.4 percent of revenues),
respectively, to design, develop, and modify existing or new products and
services.

     Investment products

The Company is looking to capitalize on international growth opportunities in
the investment management industry by expanding the distribution of the
Company's investment products and services through asset management solutions
for institutions and high-net-worth investors outside North America.  The
Company's strategy is designed to capitalize on two major trends in the global
marketplace:  (1) the privatization and globalization of pension funds, and (2)
the increased wealth accumulation among high-net-worth investors.  The Company's
marketing efforts have focused on four main regions:  Europe, East Asia, Latin
America, and South Africa.  In all four regions, the Company's initial strategy
is to team with local partners to establish name recognition and distribution
channels for the Company's products and services.  The Company's global asset
management group has made significant progress during the past two years,
including the establishment of an offshore fund family in Ireland, the creation
of a distribution network and an acquisition of an investment advisory firm in
Argentina, a joint venture in Taiwan, and asset management contracts signed with
a Swiss pension plan and several South African institutions.

     Year 2000

In 1995, the Company began a comprehensive program to address the Year 2000
compliance problem facing the Company's TRUST 3000 product line's technology and
operating systems. The Company has completed an analysis of the impact Year 2000
will have on TRUST 3000 and has begun the necessary work to ensure that the
product line is Year 2000 compliant by early 1999. Management estimates that it
will cost about $10 million to bring TRUST 3000 into Year 2000 compliance, the
majority of which will be capitalized. Thus far, the Company has expended about
$3.5 million fixing TRUST 3000. Year 2000 is a major focus of the Company's
development efforts.

In 1997, the Company expanded its Year 2000 review and analysis to include all
other facets of its business. The Company has a dedicated staff that is
reviewing the Year 2000 status of all software and technology vendors utilized
in the Company's operations and by the mutual funds administered by the Company.
Management does not expect to expend significant resources to bring all its
internal proprietary systems into Year 2000 compliance. (See Assessment of Risks
Associated with the Year 2000 in Management's Discussion and Analysis of
Financial Condition and Results of Operations).

                                       9
<PAGE>
 
Regulatory Considerations
- -------------------------

SIDCO and SIMC are subject to various federal and state laws and regulations
that grant supervisory agencies, including the SEC, broad administrative powers.
In the event of a failure to comply with such laws and regulations, the possible
sanctions that may be imposed include the suspension of individual employees,
limitations on SIDCO's or SIMC's engaging in business for specified periods of
time, the revocation of SIDCO's or SIMC's registration as a broker-dealer or
investment advisor, censures, and fines.  SEI Trust is subject to laws and
regulations imposed by state banking authorities.  In the event of a failure to
comply with these laws and regulations, limitations may be placed on the
business of SEI Trust, or its license as a trust company may be revoked.

Investment products offered by SEI and its subsidiaries are also subject to
regulation by the SEC and state securities authorities, as well as non-U.S.
regulatory authorities, where applicable.  Existing or future regulations that
affect these investment vehicles or their investment strategies could impair
their investment performance and lead to a reduction in sales of such investment
products.  Directed brokerage payment arrangements offered by the Company are
also subject to SEC and other federal regulatory authorities.  Changes in the
regulation of directed brokerage or soft dollar payment arrangements could
affect the Company's sales of some services, primarily its brokerage and
consulting services.

Bank clients of both business segments are subject to supervision by federal and
state banking authorities concerning the manner in which such clients purchase
and receive the Company's products and services. Plan sponsor clients are
subject to supervision by the Department of Labor and compliance with employee
benefit regulations. Investment advisor clients are regulated by the SEC and
state securities authorities. Existing or future regulations applicable to the
Company's clients may affect such clients' purchase of the products and services
offered by the Company.

Personnel
- ---------

At February 28, 1998, the Company had 1,061 full-time and 72 part-time
employees.  None of the Company's employees are represented by a labor union.
The Company considers its employee relations to be good.

Item 2.  Properties.
         ----------

The Company relocated its corporate headquarters to Oaks, Pennsylvania in late
1996. The new campus consists of five buildings situated on approximately 90
acres. The buildings and the land are owned and operated by the Company, which
encompasses approximately 225,000 square feet. The Company's data center and
warehouse facility are housed in an additional 70,000 square feet of leased
space in Wayne, Pennsylvania. The Company also leases an additional 67,500
square feet of space in Wayne for its mutual funds operation. All other offices
leased by the Company aggregate 43,000 square feet. The Company owns a New York
City condominium (3,400 square feet) used for business purposes.

Item 3.  Legal Proceedings.
         -----------------

There are no legal proceedings to which the Company is a party or to which any
of its properties is subject which are expected to have a material adverse
effect on the business of the Company.

Item 4.  Submission of Matters to a Vote of Security Holders.
         ---------------------------------------------------

There were no matters submitted to a vote of security holders during the fourth
quarter of 1997.

Information with regard to the executive officers of the Company is contained in
Item 10 hereof and is incorporated by reference to this Part I.

                                      10
<PAGE>
 
                                    PART II
                                    -------


Item 5.  Market for the Registrant's Securities and Related Stockholder Matters.
         ----------------------------------------------------------------------

Price Range of Common Stock:
- ---------------------------

The Company's common stock is traded in the NASDAQ National Market System under
the symbol SEIC.  The following table shows the range of closing sales prices on
the NASDAQ National Market System for the periods indicated.

1997                      High                     Low
- ----                      ----                     ---
First Quarter            25 3/4                   20
Second Quarter           24 3/8                   18 3/4
Third Quarter            33 1/2                   24
Fourth Quarter           44 1/2                   32 3/4

1996                      High                     Low
- ----                      ----                     ---
First Quarter            24 1/2                   21 1/4
Second Quarter           26 3/8                   21 1/8
Third Quarter            24 1/2                   17 3/4
Fourth Quarter           23 1/2                   20

As of February 28, 1998, there were approximately 1,100 shareholders of record.
The Board of Directors declared a $.14 dividend in May and December of 1997, and
a $.12 dividend in May and December of 1996.  The Board of Directors has
indicated its intention to pay future dividends on a semiannual basis.

                                      11
<PAGE>
 
Item 6.  Selected Financial Data.
         -----------------------
(In thousands, except per share data)

The following table summarizes selected financial data for the five years in the
period ended December 31, 1997.  The historical selected financial data for the
Company for each of the five years in the period ended December 31 are derived
from, and are qualified by reference to, the financial statements of the Company
which are included with Item 8 in this report.  Such financial statements have
been audited by Arthur Andersen LLP, independent public accountants, to the
extent indicated in their reports.  This data should be read in conjunction with
the Company's financial statements and "Management's Discussion and Analysis of
Financial Condition and Results of Operations" included in this report.

<TABLE> 
<CAPTION> 

                    For the Year       1997        1996       1995(A)       1994(A)      1993(A)
===============================================================================================
<S>                                  <C>         <C>         <C>           <C>         <C> 
Revenues............................ $292,749    $247,817    $225,964      $205,051    $185,064
Expenses:
  Operating and development.........  148,536     129,776     115,366       110,504     108,743
  Sales and marketing...............   84,770      68,719      58,892        48,561      39,521
  General and administrative........   13,931      13,235      16,963        16,919      16,865
                                     --------    --------    --------      --------    --------
Income from continuing operations
before interest and income taxes....   45,512      36,087      34,743        29,067      19,935
Gain on sale of investments
 available for sale.................       --       1,097          --            --          --
Interest income.....................      983         808       1,019           407         350
Interest expense....................   (2,488)        (48)       (255)          (33)        (35)
                                     --------    --------    --------      --------    --------
Income from continuing operations
 before income taxes................   44,007      37,944      35,507        29,441      20,250
Income taxes........................   17,163      14,798      14,381        11,188       7,493
                                     --------    --------    --------      --------    --------
Income from continuing operations...   26,844      23,146      21,126        18,253      12,757
Income (loss) from discontinued
 operations.........................       --          --      (1,942)          997       3,382
Loss on disposal of discontinued
 operations.........................       --     (16,335)         --            --          --
                                     --------    --------    --------      --------    --------
Net income..........................  $26,844      $6,811     $19,184       $19,250     $16,139
===============================================================================================
Basic earnings per common share
 from continuing operations.........    $1.47       $1.25       $1.14          $.97        $.66
Basic earnings (loss) per common
 share from discontinued operations.       --        (.88)       (.11)          .05         .18
                                     --------    --------    --------      --------    --------
Basic earnings per common share.....    $1.47        $.37       $1.03         $1.02        $.84
Shares used to calculate basic
 earnings per common share..........   18,315      18,497      18,607        18,845      19,275
- -----------------------------------------------------------------------------------------------
Diluted earnings per common share
 from continuing operations.........    $1.40       $1.20       $1.08          $.91        $.62
Diluted earnings (loss) per common
 share from discontinued operations.       --        (.85)       (.10)          .05         .16
                                     --------    --------    --------      --------    --------
Diluted earnings per common share...    $1.40        $.35        $.98          $.96        $.78
Shares used to calculate diluted
 earnings per common share..........   19,236      19,364      19,554        20,101      20,690

Cash dividends declared per common
 share..............................     $.28        $.24        $.20          $.16        $.12
===============================================================================================
Year-end Financial Position

Property and equipment, net......... $ 52,131    $ 48,620    $ 24,299       $25,338     $22,279
Total assets........................ $168,884    $141,041    $101,347       $91,148     $88,229
Short-term borrowings............... $     --    $ 20,000    $     --       $    --     $    --
Long-term debt (including short-
 term portion)...................... $ 35,000    $     --    $     --       $    --     $    --
Shareholders' equity................ $ 46,410    $ 56,108    $ 56,002       $51,309     $51,541
===============================================================================================
</TABLE> 
(A)  Information for 1995, 1994, and 1993 has been reported to reflect the SEI
     Capital Resources Division and the SEI Defined Contribution Retirement
     Services Division as discontinued operations. See Note 2 of the Notes to
     Consolidated Financial Statements.

                                      12
<PAGE>
 
Item 7.  Management's Discussion and Analysis of Financial Condition and Results
         -----------------------------------------------------------------------
         of Operations.
         -------------
                     (In thousands, except per share data)

The Company is organized around its two primary business lines:  Investment
Technology and Services and Asset Management.  Financial information on each of
these segments is reflected in Note 12 of the Notes to Consolidated Financial
Statements included with Item 8 to this report.

Results of Operations
- ---------------------

1997 Compared with 1996

The Company's results of operations for the year ended December 31, 1997
included revenues from continuing operations of $292,749, compared to $247,817
reported in the same period of 1996, an increase of approximately 18 percent.
Income from continuing operations for 1997 was $26,844, compared to $23,146
reported in 1996, an increase of 16 percent.  Diluted earnings per share from
continuing operations for 1997 was $1.40 compared to $1.20 reported in 1996, an
increase of 17 percent.  Total fund balances at December 31, 1997 were $115.7
billion compared to $85.2 billion at December 31, 1996, an increase of 36
percent.  Included in these totals are proprietary fund balances of $82.5
billion at December 31, 1997 and $61.4 billion at December 31, 1996, an increase
of 34 percent.  Revenues and earnings from continuing operations increased in
1997 primarily due to strong growth from the Company's Asset Management segment
representing a major turnaround in this business.  However, the growth in
revenues and earnings from continuing operations was partially offset by the
recognition of substantial one-time trust technology services revenues in 1996
due to bank clients involved in mergers and acquisitions.  Also in 1996, the
Company recognized a $1.1 million one-time realized gain, or $.03 diluted
earnings per share, from the sale of investments held by the Company.  Future
revenues and earnings are expected to increase in the event fund balances
continue to expand and the Company contracts new trust clients.


Investment Technology and Services
- ----------------------------------

Revenues from the Investment Technology and Services segment for the year ended
December 31, 1997 and 1996 were $182,509 and $171,034, respectively.


                  INVESTMENT TECHNOLOGY AND SERVICES REVENUES
                  -------------------------------------------
                                                       DOLLAR   PERCENT
                                 1997       1996       CHANGE    CHANGE
                                 ----       ----       ------   -------
Trust technology services      $103,838   $111,560    $(7,722)    (7%)
Proprietary fund services        72,980     57,963     15,017     26%
Trust back-office processing                                   
  services                        5,691      1,511      4,180    277%
                               --------   --------    -------  
                                                               
  Total                        $182,509   $171,034    $11,475      7%
                               ========   ========    =======

The comparison of trust technology services revenues were affected by the
recognition of significant one-time contractual buyout fees in 1996.  The
Company recognized an additional $4.5 million of one-time fees in 1996 compared
to 1997 associated with trust clients that terminated their relationships with
the Company.  When a client terminates, recurring processing fees earned by the
Company are negatively impacted in future periods.  As a result, recurring
processing fees in 1997 decreased approximately $4.8 million associated with
these lost clients in 1996.  The Company recognized an increase of $2.2 million
in one-time implementation fees in 1997 compared to 1996.  This was the result
of the Company contracting with new trust clients and the expansion of services
to existing bank clients involved in mergers or acquisitions.  Once a client is
fully implemented, recurring processing fees are favorably impacted in future
periods.  The full impact on recurring processing fees relating to the new trust
client relationships established in 1997 will not be completely recognized until
early 1999.  Preliminary forecasts for trust technology services revenues in
future years are optimistic primarily due to

                                      13
<PAGE>
 
the increased interest the Company has experienced in its trust products, as
evidenced by the contracting of new trust clients in 1997.  However, future
revenues could be negatively affected by the loss of bank clients involved in
mergers and acquisitions.

Proprietary fund services revenues reported another year of strong growth
primarily fueled by the increase in average proprietary fund balances over the
past year.  Average proprietary fund balances increased $22.4 billion or 44
percent from $50.4 billion during 1996 to $72.8 billion during 1997.
Proprietary fund services revenues are derived from the administrative fees
which the Company earns based on a fixed percentage, referred to as basis
points, of the average daily net asset value of the proprietary funds. The
amount of basis points earned is specific to each proprietary fund complex and
can vary among complexes. Average basis points earned decreased primarily due to
the Company entering into a new contract with one of its largest non-bank
proprietary clients in mid-1996. This decrease in administrative fees earned by
the Company was offset by an equal reduction in direct proprietary fund
expenses. The growth in proprietary fund balances was mainly fueled by growth
from existing proprietary fund complexes. This growth in existing complexes was
primarily the result of banks becoming more successful at selling mutual funds
and the favorable stock market environment. Additionally, proprietary fund
balances were affected by regulatory changes in 1996 that permit the transfer of
common trust assets into proprietary mutual funds on a tax-free basis.
Proprietary fund services revenues are expected to expand in 1998 as banks
continue to effectively compete in a rapidly growing mutual fund industry.
However, future revenues may be negatively impacted by continued consolidation
within the banking industry and an unfavorable change in the stock market
environment.

The Company is currently experiencing significant growth in its trust back-
office processing business which is an extension of its trust technology
services business.  Through this business, the Company handles all back-office
administration functions of a trust department, thereby allowing trust officers
to concentrate on expanding and servicing their clients.  The increase in trust
back-office processing services revenues was the result of the Company
establishing new client relationships in 1997, including some larger banks.  As
the concept of total outsourcing gains credibility within the banking industry,
especially among larger banks, the Company expects the growth in this business
to continue into 1998.

                  INVESTMENT TECHNOLOGY AND SERVICES EXPENSES
                  -------------------------------------------

                                                       DOLLAR        PERCENT
                              1997       1996          CHANGE        CHANGE
                              ----       ----          ------        -------

Operating and development   $99,950     $93,451        $6,499           7%
Sales and marketing         $36,433     $31,372        $5,061          16%

The 7 percent increase in operating and development expenses was the result of
several distinct factors that occurred in 1997. First, the direct correlation
between proprietary fund revenues and expenses accounted for the majority of the
increase in operating and development expenses. Second, during the past two
years, the Company expended significant resources to enhance its trust
technology software, primarily through the open architecture project, as well as
a concentrated effort to address the Year 2000 issue (See Assessment of Risks
Associated with the Year 2000). The Company expects continued investments in its
trust technology software to continue into 1998. With the completion and
subsequent release of several capitalized software development projects,
amortization of these capitalized software development projects increased
significantly in 1997. Finally, the contracting of new trust back-office
processing clients requires additional personnel and other operating costs to
properly service and maintain the relationship. As a result, personnel and other
operating expenses increased due to the significant growth in this product line.

Sales and marketing expenses increased 16 percent in 1997 primarily due to an
increase in personnel and promotion costs.  Personnel costs increased as a
result of additional sales compensation associated with the contracting of new
trust clients in 1997, an increase in personnel, and salary increases.  The
increase in promotion costs was the result of additional Company sponsored
marketing events in 1997.

                                      14
<PAGE>
 
The Investment Technology and Services segment recorded an operating profit of
$46,126 with an operating margin of 25 percent for the year ended December 31,
1997, compared to an operating profit of $46,211 with an operating margin of 27
percent for the year ended December 31, 1996.  The decrease in operating margins
in 1997 compared to 1996 was the result of the Company experiencing higher
growth in its lower margin products and the increase in amortization of
capitalized software development projects.  Additionally, operating margins in
1996 were partially affected by the substantial one-time trust technology
services revenues recognized by the Company in 1996.  With the increased
interest in the Company's trust products and the increased acceptance of total
outsourcing, management believes these factors will create additional
opportunities for the Company in future years.  Additionally, if banks can
continue to maintain their market share of invested assets in a rapidly growing
mutual fund industry, future proprietary fund services revenues could continue
to grow.  Conversely, future revenues and operating profits in this segment
could be negatively affected by the loss of bank clients as a result of
continued consolidation within the banking industry and changes in banking
regulations, as well as an unfavorable change in the stock market environment.


Asset Management
- ----------------

Revenues from the Asset Management segment for the year ended December 31, 1997
and 1996 were $110,240 and $76,783, respectively.


                           ASSET MANAGEMENT REVENUES
                           -------------------------

                                                        DOLLAR     PERCENT
                                   1997       1996      CHANGE      CHANGE
                                   ----       ----      ------     -------
Investment management services  $ 54,694    $37,439    $17,255       46%
Liquidity management services     22,994     20,727      2,267       11%
Other investment products                                        
  and services                    32,552     18,617     13,935       75%
                                --------    -------    -------   
Total                           $110,240    $76,783    $33,457       44%
                                ========    =======    =======

Investment management services revenues increased 46 percent from the prior-year
period due to an increase in average fund balances from the Company's Family of
Funds during the past year.  Investment management services revenues are
primarily derived from the management fees which the Company earns based on a
fixed percentage, referred to as basis points, of the average daily net asset
value of the Company's Family of Funds.  Average basis points earned on the
Company's Family of Funds increased slightly during 1997.  Average assets under
management increased $3.2 billion to $10.2 billion for 1997 compared to $7.0
billion for 1996, an increase of 46 percent.  This increase in average fund
balances was primarily the result of increased sales of the Company's Family of
Funds to high-net-worth individuals through various registered investment
advisors, financial planners, and other financial intermediaries, as well as an
increase in sales of its asset management programs to institutional investors
during 1997.  Additionally, the current favorable stock market environment has
aided the growth in average assets under management.  Future investment
management services revenues are expected to increase as the Company continues
to expand its high-net-worth client base and from increased acceptance of its
asset management programs by institutional investors.  However, these increases
could be adversely affected by unfavorable changes in the stock market 
environment.

The 11 percent increase in liquidity management services revenues was mainly
driven by the increase in average fund balances invested in the Company's lower-
fee liquidity products. Liquidity management services revenues are derived from
the management fees which the Company earns based on a fixed percentage,
referred to as basis points, of the average daily net asset value of the
Company's liquidity funds.  Average basis points the Company earned decreased
slightly in 1997.  Average assets under management from the Company's liquidity
funds grew $1.9 billion to $16.8 billion in 1997 compared to $14.9 billion in
1996.  Additionally, the increase in revenues was slightly influenced by the
growth experienced from the Company's cash sweep services to smaller banks in
1997.  The introduction of new liquidity products during the past few years may
provide additional growth opportunities for the Company in the future.  However,
management anticipates modest growth in liquidity management services revenues
in the near term.

                                      15
<PAGE>
 
Other investment products and services revenues increased 75 percent primarily
due to an increase in bank-related brokerage services.  Additionally, several of
the Company's new business ventures have experienced significant revenue growth
during the past year.


                           ASSET MANAGEMENT EXPENSES
                           -------------------------

                                                        DOLLAR     PERCENT
                              1997         1996         CHANGE     CHANGE
                              ----         ----         ------     -------

Operating and development   $48,586      $36,325       $12,261       34%
Sales and marketing         $48,337      $37,347       $10,990       29%


Operating and development expenses increased 34 percent over the prior-year
period. The majority of this increase can be attributed to the direct
correlation between revenues and certain expenses. The Company incurred
additional direct brokerage expenses as a result of the growth in bank-related
brokerage services revenues, as well as an increase in investment advisor fees
associated with the increase in assets under management. Also, the Company
incurred additional operating costs relating to the continued commitment by the
Company to extend its asset management products into foreign markets.

Sales and marketing expenses increased 29 percent primarily due to an increase
in personnel and promotion expenses.  The increase in personnel costs related to
additional sales compensation payouts associated with the increase in new sales
of the Company's asset management products, as well as an overall increase in
personnel.  The additional promotion costs are primarily attributable to the
Company's sponsorship of the television series "Beyond Wall Street", which aired
in the fourth quarter of 1997.  Also, the Company continued to make substantial
investments to establish name recognition and distribution channels for its
asset management products internationally.

The Asset Management segment recorded an operating profit of $13,317 with an
operating margin of 12 percent for the year ended December 31, 1997, compared to
an operating profit of $3,111 with an operating margin of 4 percent for the year
ended December 31, 1996.  The increased operating profit and margin in 1997 was
primarily due to the substantial increase in assets under management, as well as
improved performance from some of the Company's new business ventures.
Management of the Company believes that with the increased acceptance of its
asset management products and services, especially among high-net-worth
investors and institutional investors, assets under management should continue
to reflect strong growth that would increase operating profits and margins over
the next several years.  However, an unfavorable change in the stock market
environment could adversely affect this segments future operating profits and
margins.


Other Income and Expenses
- -------------------------

General and administrative expenses for the year ended December 31, 1997 and
1996 were $13,931 and $13,235, respectively.  General and administrative
expenses increased 5 percent primarily due to increases in facilities and
corporate overhead expenses.

Interest income for the year ended December 31, 1997 and 1996 was $983 and $808,
respectively.  Interest income is earned based upon the amount of cash that is
invested daily and fluctuations in interest income recognized for one period in
relation to another is due to changes in the average cash balance invested for
the period.

Interest expense for the year ended December 31, 1997 and 1996 was $2,488 and
$48, respectively.  Interest expense for 1997 primarily relates to the Company's
issuance of long-term debt in early 1997 (See Note 7 of The Notes to
Consolidated Financial Statements).  Interest costs associated with the
Company's borrowings under its line of credit in 1996 were capitalized as it
related to the construction of the Company's corporate campus.

The Company's effective tax rate from continuing operations was 39.0 percent for
1997 and 1996.  The Company accounts for income taxes in accordance with
Statement of Financial Accounting Standards No. 109, "Accounting for Income
Taxes" (See Note 1 and Note 11 of the Notes to Consolidated Financial
Statements).

                                      16
<PAGE>
 
1996 Compared with 1995

The Company's results of operations for the year ended December 31, 1996
included revenues from continuing operations of $247,817, compared to $225,964
reported in the same period of 1995, an increase of approximately 10 percent
over the prior period.  Income from continuing operations for 1996 was $23,146
or $1.20 diluted earnings per share, compared to $21,126 or $1.08 diluted
earnings per share reported in 1995.  Diluted earnings per share from continuing
operations for 1996 increased 11 percent over the prior year.  At December 31,
1996, the Company recorded a charge for the expected loss on disposal of
discontinued operations of $16,335 or $.85 diluted earnings per share (See Note
2 of the Notes to Consolidated Financial Statements).  Total fund balances at
December 31, 1996 were $85.2 billion compared to $61.2 billion at December 31,
1995, an increase of 39 percent.  Included in these totals are proprietary fund
balances of $61.4 billion at December 31, 1996 and $41.7 billion at December 31,
1995, an increase of 47 percent.  The Company continued to make substantial
investments in the sales and marketing of its asset management products and
services, along with significant investments to expand its asset management
business internationally.  Additionally, the Company continued to invest in
trust technology, primarily through the development of its open architecture
project.


Investment Technology and Services
- ----------------------------------

Revenues from the Investment Technology and Services segment for the year ended
December 31, 1996 and 1995 were $171,034 and $157,960, respectively.

                  INVESTMENT TECHNOLOGY AND SERVICES REVENUES
                  -------------------------------------------

                                                         DOLLAR      PERCENT
                                    1996       1995      CHANGE      CHANGE
                                    ----       ----      ------      ------
Trust technology services         $111,560   $109,819    $ 1,741        2%
Proprietary fund services           57,963     47,074     10,889       23%
Trust back-office processing
  services                           1,511      1,067        444       42%
                                  --------   --------    -------      
  Total                           $171,034   $157,960    $13,074        8%
                                  ========   ========    =======

Trust technology services revenues increased 2 percent over the prior year
primarily due to a $5.6 million one-time contractual obligation received from a
client that terminated its relationship with the Company in the first quarter of
1996.  This one-time fee more than offset a decline in trust processing fees.

Proprietary fund services revenues increased 23 percent over the prior period
due to an increase in average proprietary fund balances during the past year
despite the loss of two proprietary fund complexes in the first quarter of 1996.
Proprietary fund services revenues are derived from the administrative fees
which the Company earns based on a fixed percentage of the average daily net
asset value of the proprietary funds.  Average proprietary fund balances
increased $16.1 billion or 47 percent from $34.3 billion during 1995 to $50.4
billion during 1996.  This increase in proprietary fund balances was the result
of growth in existing fund complexes and the commencement of several new fund
complexes during the past year.

Trust back-office processing services is an extension of the Company's trust
technology services business.  The 42 percent increase was primarily the result
of an increase in processing fees associated with the contracting of new
clients.

                                      17
<PAGE>
 
                  INVESTMENT TECHNOLOGY AND SERVICES EXPENSES
                  -------------------------------------------

                                                        DOLLAR     PERCENT
                                  1996        1995      CHANGE      CHANGE
                                  ----        ----      ------     ------
Operating and development       $93,451     $82,529     $10,922      13%
Sales and marketing             $31,372     $30,255     $ 1,117       4%  

The 13 percent increase in operating and development expenses was primarily
attributable to increases in consulting and outsourcing expenses, in addition to
direct expenses associated with the growth in proprietary fund balances.  The
increase in consulting and outsourcing expenses reflects the Company's
significant investment in trust technology, mainly through its open architecture
project.  Additionally, significant investments were made by the Company to
enhance its back-office outsourcing solution.

The 4 percent increase in sales and marketing expenses was due to an increase in
personnel and promotion expenses.

Operating profit from Investment Technology and Services for the year ended
December 31, 1996 was $46,211, an increase of 2 percent from the $45,176 for the
corresponding period of 1995.  Operating margins for this segment decreased to
27 percent in 1996 compared to 29 percent in 1995.  In addition to the items
previously discussed, the decline in operating margins is attributable to the
Company experiencing higher growth in its lower margin products.


Asset Management
- ----------------

Revenues from the Asset Management segment for the year ended December 31, 1996
and 1995 were $76,783 and $68,004, respectively.

                           ASSET MANAGEMENT REVENUES
                           -------------------------

                                                      DOLLAR       PERCENT
                                  1996      1995      CHANGE       CHANGE
                                  ----      ----      ------       -------
 
Investment management services   $37,439   $33,022    $4,417         13%
Liquidity management services     20,727    21,944    (1,217)        (6%)
Other investment products
  and services                    18,617    13,038     5,579         43%
                                 -------   -------    ------
  Total                          $76,783   $68,004    $8,779         13%
                                 =======   =======    ======

Investment management services revenues increased 13 percent due to an increase
in average fund balances from the Company's Family of Funds over the past year.
This increase was the result of increased sales of the Company's Family of Funds
to high-net-worth individuals through various registered investment advisors.

Liquidity management services revenues decreased 6 percent as a result of
clients transferring assets from higher-fee liquidity products to lower-fee
liquidity products, even though average fund balances increased in 1996.

The 43 percent increase in other investment products and services revenues is
primarily due to an internal reassignment of bank-related brokerage services.

                                      18
<PAGE>
 
                           ASSET MANAGEMENT EXPENSES
                           -------------------------

                                                      DOLLAR    PERCENT
                                 1996       1995      CHANGE     CHANGE
                                 ----       ----      ------    -------
Operating and development       $36,325    $32,837    $3,488      11%
Sales and marketing             $37,347    $28,637    $8,710      30%


The 11 percent increase in operating and development expenses was due primarily
to an increase in direct expenses associated with the increase in brokerage and
consulting services revenues.

The 30 percent increase in sales and marketing expenses was primarily
attributable to increases in personnel, travel, and promotion expenses to
strengthen the Company's asset management business.  Additionally, the Company
made significant investments in 1996 to establish its distribution channels in
non-U.S. markets.

The Asset Management segment recorded an operating profit of $3,111 in 1996,
compared to $6,530 in 1995.  The lower operating profit represents the Company's
continued commitment to establishing itself as a significant participant in the
domestic and international asset management marketplace.

Other Income and Expenses
- -------------------------

General and administrative expenses for the year ended December 31, 1996 and
1995 were $13,235 and $16,963, respectively.  General and administrative
expenses declined 22 percent primarily due to decreases in personnel expenses in
corporate overhead areas, in addition to a shift of certain costs to the
individual business segments in 1996.

Gain on sale of investments available for sale for the year ended December 31,
1996 was $1,097.  The realized gain is a result of the Company's disposition of
certain marketable securities classified as Investments available for sale at an
amount greater than original cost (See Note 5 of the Notes to Consolidated
Financial Statements).

Interest income for the year ended December 31, 1996 and 1995 was $808 and
$1,019, respectively. Interest income is earned based upon the amount of cash
that is invested daily and fluctuations in interest income recognized for one
period in relation to another is due to changes in the average cash balance
invested for the period.

Interest expense for the year ended December 31, 1996 and 1995 was $48 and $255,
respectively.  Borrowings under the line of credit in 1996 were primarily used
to finance the construction of the Company's new corporate campus.  Therefore,
in 1996, the majority of interest expense that related to the borrowings under
the line of credit has been capitalized and is reflected in Buildings (See Note
1 of the Notes to Consolidated Financial Statements).

The Company's effective tax rate from continuing operations was 39.0 percent for
1996 and 40.5 percent for 1995.  The Company accounts for income taxes in
accordance with Statement of Financial Accounting Standards No. 109, "Accounting
for Income Taxes" (See Note 1 and Note 11 of the Notes to Consolidated Financial
Statements).

                                      19
<PAGE>

Liquidity and Capital Resources
- -------------------------------

The Company's ability to generate adequate cash to meet its needs results
primarily from cash flow from operations and its capacity for additional
borrowing.  The Company has a line of credit agreement which provides for
borrowings of up to $50,000 (See Note 6 of the Notes to Consolidated Financial
Statements).  At December 31, 1997, the Company's unused sources of liquidity
consisted primarily of cash and cash equivalents of $16,891 and the unused
portion of the line of credit of $50,000. The availability of the line of credit
is subject to the Company's compliance with certain covenants set forth in the
agreement. On February 24, 1997, the Company issued $35,000 of medium-term notes
(See Note 7 of the Notes to Consolidated Financial Statements). The proceeds
were used to repay the outstanding balance on its line of credit at that date,
which amounted to $30,000. The Company made its first principal payment of
$2,000 on its long-term debt in February 1998.

Cash flow generated from operations was $49,906, $33,285, and $24,352, in 1997,
1996, and 1995, respectively.  The increase in operating cash flow is primarily
due to the increase in income and the increase in various accrued liabilities.
Cash flow provided by operations in 1997 was negatively affected by the increase
in receivables.  As a result of the contracting of new trust clients in 1997,
the Company experienced a substantial increase in unbilled receivables relating
to implementation fees.  The increase in unbilled receivables is the result of
timing differences between services provided and contractual billing schedules
(See Note 3 of the Notes to Consolidated Financial Statements).

Cash flows provided by operations were also affected by several other factors.
Receivables from regulated investment companies increased in 1997 primarily due
to the increase in assets under management.  These balances are paid off in the
following month.  In 1997, cash flows from operations were favorably affected by
the sales of loans classified as Loans receivable available for sale by the
Company's Swiss based subsidiary, whereas, cash flows from operations in 1996
were negatively affected by the purchase of these loans.  In 1996 and 1995, a
substantial amount of cash was used to support the Company's discontinued
operations.

Capital expenditures, including capitalized software development costs, for
1997, 1996, and 1995 were $21,051, $43,728, and $11,610, respectively, are the
primary factors affecting cash flows from investing activities.  Capital
expenditures in 1996 included significant costs associated with the construction
of the Company's new corporate campus, which was completed in late 1996, along
with an increase in capitalized software development costs in connection with
the open architecture project and Year 2000 program.  Capitalized software
development costs relating to these projects is expected to continue in 1998.
Additionally, the Company is currently reviewing plans to expand its corporate
campus.  Construction is expected to begin in early 1998 and should be completed
by late 1998 at an estimated cost of $5,000.  In 1996, the Company received
$6,536 from the sale of marketable securities classified as Investments
available for sale (See Note 5 of the Notes to Consolidated Financial
Statements). The Company acquired 1.4 million shares of its common stock at a
cost of $43,620 during 1997 pursuant to an open market stock purchase
authorization of $228,365 made by the Board of Directors. The Company has
purchased approximately 14.9 million shares of its common stock at a cost of
$219,318 as of February 28, 1998 since the inception of the stock buyback
program. At that date, the Company still had approximately $9,047 remaining
authorized for the purchase of its common stock.

The Company's operating cash flow, borrowing capacity, and liquidity should
provide adequate funds for continuing operations, continued investment in new
products and equipment, its common stock repurchase program, future dividend
payments, and principal and interest payments on its long-term debt.

                                      20
<PAGE>
 
Discontinued Operations
- -----------------------

In May 1995, the Company's Board of Directors approved a plan of disposal for
the SEI Capital Resources Division ("CR") and the SEI Defined Contribution
Retirement Services Division ("DC").  CR provided investment performance
evaluation services, consulting services, and brokerage services to employee
benefit plan sponsors and investment advisors in the United States.  CR was sold
to a private investment firm on December 31, 1997.  DC provided administrative
and processing services, recordkeeping services, and employee retirement
planning materials for use by defined contribution plans.  The Company completed
the transfer of DC's operations to the acquiring firm in 1996.

Discontinued operations for the year ended December 31, 1997 had revenues of
$25,675 and pre-tax losses of $3,294, compared to revenues of $32,940 and pre-
tax losses of $6,170 for the year ended December 31, 1996.  The 1997 losses were
charged against the provision established for the disposal of discontinued
operations and is reflected in Accrued discontinued operations disposal costs on
the accompanying Consolidated Balance Sheets (See Note 2 of the Notes to
Consolidated Financial Statements).

Recent Accounting Pronouncements
- --------------------------------

In June 1997, the Financial Accounting Standards Board issued Statement of
Financial Accounting Standards No. 130, "Reporting Comprehensive Income" ("SFAS
130"), and Statement of Financial Accounting Standards No. 131, "Disclosures
about Segments of an Enterprise and Related Information" ("SFAS 131").  SFAS No.
130 is required to be adopted for the Company's fiscal year ending December 31,
1998.  The adoption of this pronouncement is expected to have no impact on the
Company's financial position or results of operations.  SFAS 131 is required to
be adopted for the Company's 1998 year-end financial statements.  The Company is
currently evaluating the impact, if any, of the adoption of this pronouncement
on the Company's existing disclosures (See Note 1 of the Notes to Consolidated
Financial Statements).

Assessment of Risks Associated with the Year 2000
- -------------------------------------------------

The Company began to address the Year 2000 issue in 1995, initially focusing on
its TRUST 3000 product line.  In 1997, a committee was formed with
representatives from all areas of the Company's business in order to review all
internal proprietary systems and every vendor with which the Company interacts.
Each vendor was contacted in order for the Committee to assess the impact the
Year 2000 will have on operations.  The assessment included a questionaire,
review of financial information, and information available on the internet.  In
addition, if warranted, the Company will initiate appropriate systems testing in
order to make a reasonable determination as to whether a vendor will, in fact,
be Year 2000 compliant on time.  SEI customers have been informed of the
Company's Year 2000 program through a users group and periodic communications.

The current Year 2000 project has the highest level of corporate commitment.
The Company will utilize both internal and external resources to reprogram, or
replace, and test software for Year 2000 compliance. The Company plans to have
all its systems Year 2000 compliant by early 1999. Management estimates that it
will cost about $10 million to bring TRUST 3000 into Year 2000 compliance, the
majority of which will be capitalized. Management does not expect to expend
significant resources to bring all its internal proprietary systems into Year
2000 compliance. Amounts incurred for internal systems are expensed, unless new
software is purchased which is capitalized. The cost of the Year 2000 project
and the date on which the Company plans to complete Year 2000 modifications are
based on management's best estimates. At this time, management does not believe
the financial impact of the Company's Year 2000 project will have a material
adverse affect on its financial position or results of operations in any given
year. However, if the Company or any significant vendors utilized in the
Company's operations do not successfully achieve Year 2000 compliance in a
timely manner, the Company's operations could be adversely affected.

Safe Harbor Statement Under the Private Securities Litigation Reform Act of 1995
- --------------------------------------------------------------------------------

Except for the historical information contained herein, the matters discussed in
this report are forward-looking statements which involve risks and
uncertainties, including but not limited to economic, competitive, governmental
and technological factors affecting the Company's operations, markets, services
and related products, prices, and other factors discussed in the Company's prior
filings with the Securities and Exchange Commission.  Although the Company
believes the assumptions underlying the forward-looking statements contained
herein are reasonable, any of the assumptions could be inaccurate. 

                                      21
<PAGE>
 
Item 7A.  Quantitative and Qualitative Disclosure about Market Risk.
          ---------------------------------------------------------

Not Applicable.

                                      22
<PAGE>
 
Item 8.  Financial Statements and Supplementary Data.
         -------------------------------------------

Index to Financial Statements:

     Report of Independent Public Accountants
     Consolidated Balance Sheets -- December 31, 1997 and 1996
     Consolidated Statements of Operations -- For the years ended
       December 31, 1997, 1996, and 1995
     Consolidated Statements of Shareholders' Equity -- For the years ended
       December 31, 1997, 1996, and 1995
     Consolidated Statements of Cash Flows -- For the years ended
       December 31, 1997, 1996, and 1995
     Notes to Consolidated Financial Statements
     Schedule II -- Valuation and Qualifying Accounts
 
All other schedules are omitted because they are not applicable, or not
required, or because the required information is included in the Consolidated
Financial Statements or notes thereto.


                                      23
<PAGE>
 
                   REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS

To SEI Investments Company:

We have audited the accompanying consolidated balance sheets of SEI Investments
Company (formerly SEI Corporation)(a Pennsylvania corporation) and subsidiaries
as of December 31, 1997 and 1996, and the related consolidated statements of
operations, shareholders' equity and cash flows for each of the three years in
the period ended December 31, 1997.  These financial statements and schedule are
the responsibility of the Company's management.  Our responsibility is to
express an opinion on these financial statements and schedule based on our
audits.

We conducted our audits in accordance with generally accepted auditing
standards.  Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements and schedule are
free of material misstatement.  An audit includes examining, on a test basis,
evidence supporting the amounts and disclosures in the financial statements.  An
audit also includes assessing the accounting principles used and significant
estimates made by management, as well as evaluating the overall financial
statement presentation.  We believe that our audits provide a reasonable basis
for our opinion.

In our opinion, the financial statements referred to above present fairly, in
all material respects, the financial position of SEI Investments Company and
subsidiaries as of December 31, 1997 and 1996, and the results of their
operations and their cash flows for each of the three years in the period ended
December 31, 1997 in conformity with generally accepted accounting principles.

Our audits were made for the purpose of forming an opinion on the basic
financial statements taken as a whole.  The schedule listed in the Index to
Financial Statements is presented for purposes of complying with the Securities
and Exchange Commission's rules and is not part of the basic financial
statements.  This schedule has been subjected to the auditing procedures applied
in the audits of the basic financial data required to be set forth therein in 
relation to the basic financial statements taken as a whole.

                                                      ARTHUR ANDERSEN LLP

Philadelphia, Pa.
  February 6, 1998



                                      24
<PAGE>
 
<TABLE>
<CAPTION>
                Consolidated Balance Sheets                                         SEI Investments Company
                (In thousands)                                                             and Subsidiaries
 
                                                        December 31,              1997               1996
                --------------------------------------------------------------------------------------------
 
ASSETS            Current Assets:
<S>               <C>                                                        <C>                <C>
                  Cash and cash equivalents.........................             $ 16,891           $ 13,167
                  Receivables from regulated investment
                  companies.........................................               14,452             10,836
                  Receivables, net of allowance for doubtful
                  accounts of $1,200 and $1,350.....................               31,192             19,558
                  Loans receivable available for sale...............               11,340             13,043
                  Deferred income taxes.............................                6,337              4,527
                  Prepaid expenses..................................                3,783              3,825
                                                                                 --------           --------
 
                  TOTAL CURRENT ASSETS..............................               83,995             64,956
                                                                                 --------           --------
 
                  INVESTMENTS AVAILABLE FOR SALE....................                  876              1,000
                                                                                 --------           --------
 
                  PROPERTY AND EQUIPMENT, net of accumulated
                  depreciation and amortization of $49,493
                  and $48,128.......................................               52,131             48,620
                                                                                 --------           --------
 
                  CAPITALIZED SOFTWARE, net of accumulated
                  amortization of $7,959 and $5,193.................               18,440             13,577
                                                                                 --------           --------
 
                  CUSTOMER LISTS, net of accumulated
                  amortization of $291 and $0.......................                3,009              2,000
                                                                                 --------           --------
 
                  OTHER ASSETS, net.................................               10,433             10,888
                                                                                 --------           --------
 
                                                                                 $168,884           $141,041
                --------------------------------------------------------------------------------------------
 
 
                  The accompanying notes are an integral part of these statements.
</TABLE>


                                      25
<PAGE>
 
<TABLE>
<CAPTION>
                     Consolidated Balance Sheets                                                      SEI Investments Company
                     (In thousands, except par value)                                                        and Subsidiaries
 
                                                                   December 31,                   1997                   1996
                   ------------------------------------------------------------------------------------------------------------
<S>                  <C>                                                                  <C>                   <C> 
LIABILITIES          Current Liabilities:
AND
SHAREHOLDERS'        Line of credit..............................................               $     --               $ 20,000
EQUITY               Current portion of long-term debt...........................                  2,000                     --
                     Accounts payable............................................                  5,798                  5,863
                     Accrued compensation........................................                 20,920                 14,503
                     Accrued proprietary fund services...........................                  9,812                  6,748
                     Accrued discontinued operations disposal costs..............                  7,228                  7,417
                     Other accrued liabilities...................................                 28,760                 20,303
                     Deferred revenue............................................                  7,158                  5,123
                                                                                                --------               --------
 
 
                       TOTAL CURRENT LIABILITIES.................................                 81,676                 79,957
                                                                                                --------               --------
 
 
                     LONG-TERM DEBT..............................................                 33,000                     --
                                                                                                --------               --------
 
 
                     DEFERRED INCOME TAXES.......................................                  7,798                  4,976
                                                                                                --------               --------
 
 
 
                     COMMITMENTS AND CONTINGENCIES
 
                     SHAREHOLDERS' EQUITY:
                     Series Preferred stock, $.05 par value,
                      60 shares authorized; no shares issued
                      and outstanding............................................                     --                     --
                     Common stock, $.01 par value,
                      100,000 shares authorized; 17,767 and
                      18,498 shares issued and outstanding.......................                    178                    185
                     Capital in excess of par value..............................                 46,724                 54,959
                     Retained earnings...........................................                     --                  1,141
                     Cumulative currency translation adjustments.................                   (417)                  (177)
                     Unrealized holding loss on investments......................                    (75)                    --
                                                                                                --------               --------
 
 
                       TOTAL SHAREHOLDERS' EQUITY................................                 46,410                 56,108
                                                                                                --------               --------
 
 
                                                                                                $168,884               $141,041
                   ------------------------------------------------------------------------------------------------------------
 
</TABLE>
            The accompanying notes are an integral part of these statements.


                                      26
<PAGE>
 
<TABLE>
<CAPTION>
CONSOLIDATED STATEMENTS OF OPERATIONS                                                                        SEI Investments Company
(In thousands, except per share data)                                                                               and Subsidiaries


                                                YEAR ENDED DECEMBER 31,               1997                1996                 1995
- -----------------------------------------------------------------------------------------------------------------------------------
 
<S>                                                                         <C>                  <C>                  <C>
REVENUES..............................................................            $292,749            $247,817             $225,964
EXPENSES:                                                                         
    Operating and development.........................................             148,536             129,776              115,366
    Sales and marketing...............................................              84,770              68,719               58,892
    General and administrative........................................              13,931              13,235               16,963
                                                                                  --------            --------             --------
                                                                                                                           
INCOME FROM CONTINUING OPERATIONS BEFORE INTEREST AND                                                                      
   INCOME TAXES.......................................................              45,512              36,087               34,743
                                                                                                                           
GAIN ON SALE OF INVESTMENTS AVAILABLE FOR SALE........................                  --               1,097                   --
INTEREST INCOME.......................................................                 983                 808                1,019
INTEREST EXPENSE......................................................              (2,488)                (48)                (255)
                                                                                  --------            --------             --------
                                                                                                                           
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES.................              44,007              37,944               35,507
                                                                                                                           
INCOME TAXES..........................................................              17,163              14,798               14,381
                                                                                  --------            --------             --------
                                                                                                                           
INCOME FROM CONTINUING OPERATIONS.....................................              26,844              23,146               21,126
                                                                                                                           
LOSS FROM DISCONTINUED OPERATIONS, NET OF INCOME                                                                           
   TAX BENEFIT OF $(1,295)............................................                  --                  --               (1,942)
                                                                                                                           
                                                                                                                           
LOSS ON DISPOSAL OF DISCONTINUED OPERATIONS, NET OF                                                                        
   INCOME TAX BENEFIT OF $(5,139).....................................                  --             (16,335)                  --
                                                                                  --------            --------             --------
 
NET INCOME............................................................            $ 26,844            $  6,811             $ 19,184
- -----------------------------------------------------------------------------------------------------------------------------------
 
 
BASIC EARNINGS PER COMMON SHARE:
    Earnings per common share from continuing operations..............            $   1.47            $   1.25             $   1.14
    Loss per common share from discontinued operations................                  --                (.88)                (.11)
                                                                                  --------            --------             --------
 
BASIC EARNINGS PER COMMON SHARE.......................................            $   1.47            $    .37             $   1.03
- -----------------------------------------------------------------------------------------------------------------------------------
 
 
DILUTED EARNINGS PER COMMON SHARE:
    Earnings per common share from continuing operations..............            $   1.40            $   1.20             $   1.08
    Loss per common share from discontinued operations................                  --                (.85)                (.10)
                                                                                  --------            --------             --------
 
DILUTED EARNINGS PER COMMON SHARE.....................................            $   1.40            $    .35             $    .98
- -----------------------------------------------------------------------------------------------------------------------------------
</TABLE>

The accompanying notes are an integral part of these statements.


                                      27
<PAGE>
 
<TABLE>
<CAPTION>
Consolidated Statements of Shareholders' Equity                                                              SEI Investments Company
(In thousands)                                                                                                      and Subsidiaries

                                                             
                                                                                         CUMULATIVE                                
                                              COMMON STOCK       CAPITAL                  CURRENCY      UNREALIZED        TOTAL    
                                          -----------------   IN EXCESS OF   RETAINED   TRANSLATION    HOLDING GAIN   SHAREHOLDERS' 
                                            SHARES   AMOUNT     PAR VALUE    EARNINGS   ADJUSTMENTS   ON INVESTMENTS      EQUITY
- ------------------------------------------------------------------------------------------------------------------------------------
 
<S>                                        <C>      <C>      <C>            <C>        <C>           <C>             <C>
BALANCE, DECEMBER 31, 1994................  18,781     $188        $47,406    $ 3,823         $(108)             $--       $ 51,309
Net income................................      --       --             --     19,184            --               --         19,184
Purchase and retirement of common
     stock................................    (880)      (9)        (6,264)   (12,105)           --               --        (18,378)
Issuance of common stock under the
     employee stock purchase plan.........      60       --          1,008         --            --               --          1,008
Issuance of common stock upon
     exercise of stock options............     464        5          4,364         --            --               --          4,369
Tax benefit on stock options exercised....      --       --          1,693         --            --               --          1,693
Cash dividends............................      --       --             --     (3,735)           --               --         (3,735)
Currency translation adjustments..........      --       --             --         --            50               --             50
Unrealized holding gain on investments....      --       --             --         --            --              502            502
- ------------------------------------------------------------------------------------------------------------------------------------

BALANCE, DECEMBER 31, 1995................  18,425      184         48,207      7,167           (58)             502         56,002
Net income................................      --       --             --      6,811            --               --          6,811
Purchase and retirement of common
     stock................................    (533)      (5)        (1,396)    (8,369)           --               --         (9,770)
Issuance of common stock under the
     employee stock purchase plan.........      52       --            976         --            --               --            976
Issuance of common stock upon
     exercise of stock options............     554        6          4,434         --            --               --          4,440
Tax benefit on stock options exercised....      --       --          2,738         --            --               --          2,738
Cash dividends............................      --       --             --     (4,468)           --               --         (4,468)
Currency translation adjustments..........      --       --             --         --          (119)              --           (119)
Realized gain on investments..............      --       --             --         --            --             (502)          (502)
- ------------------------------------------------------------------------------------------------------------------------------------

BALANCE, DECEMBER 31, 1996................  18,498     $185        $54,959    $ 1,141         $(177)             $--        $56,108
- -----------------------------------------------------------------------------------------------------------------------------------
</TABLE>
 
The accompanying notes are an integral part of these statements.


                                      28
<PAGE>
 
<TABLE>
<CAPTION>
Consolidated Statements of Shareholders' Equity                                                              SEI Investments Company
(In thousands)                                                                                                      and Subsidiaries
                                                                                    CUMULATIVE
                                     COMMON STOCK           CAPITAL                   CURRENCY      UNREALIZED        TOTAL
                                 --------------------  IN EXCESS OF    RETAINED    TRANSLATION    HOLDING LOSS   SHAREHOLDERS'
                                    SHARES     AMOUNT    PAR VALUE     EARNINGS    ADJUSTMENTS   ON INVESTMENTS     EQUITY
- ------------------------------------------------------------------------------------------------------------------------------
<S>                                <C>        <C>       <C>           <C>          <C>           <C>             <C>
BALANCE, DECEMBER 31, 1996.......    18,498      $185       $54,959     $  1,141         $(177)        $ --         $56,108
Net income.......................        --        --            --       26,844            --           --          26,844
Purchase and retirement of common
  stock..........................    (1,403)      (14)      (20,666)     (22,940)           --           --         (43,620)
Issuance of common stock under
 the employee stock purchase plan        47         1         1,053           --            --           --           1,054
Issuance of common stock upon
  exercise of stock options......       625         6         8,009           --            --           --           8,015
Tax benefit on stock options            
  exercised......................        --        --         3,369           --            --           --           3,369 
Cash dividends...................        --        --            --       (5,045)           --           --          (5,045)
Currency translation adjustments.        --        --            --           --          (240)          --            (240)
Unrealized holding loss
  on investments.................        --        --            --           --            --          (75)            (75)
- ------------------------------------------------------------------------------------------------------------------------------ 
BALANCE, DECEMBER 31, 1997.......    17,767      $178       $46,724     $     --         $(417)        $(75)        $46,410
- ------------------------------------------------------------------------------------------------------------------------------
</TABLE>

The accompanying notes are an integral part of these statements.


                                      29
<PAGE>
 
<TABLE>
<CAPTION>
Consolidated Statements of Cash Flows                                                                        SEI Investments Company
(In thousands)                                                                                                      and Subsidiaries

                                                Year Ended December 31,              1997                 1996                 1995
- ------------------------------------------------------------------------------------------------------------------------------------

<S>                                                                              <C>                   <C>                 <C> 
CASH FLOWS FROM OPERATING ACTIVITIES:

Net income............................................................            $ 26,844              $ 6,811             $19,184

Adjustments to reconcile net income to net cash
    provided by operating activities:
 
          Depreciation and amortization...............................              14,068               10,039              11,574
          Provision for losses on receivables.........................                  --                  144                  --
          Deferred income tax expense (benefit).......................                 893                3,821                (672)
          Discontinued operations.....................................                  --                6,046               3,055
          Tax benefit on stock options exercised......................               3,369                2,738               1,693
          Gain on sale of investments available for sale..............                  --               (1,097)                 --
          Other.......................................................              (1,214)              (3,739)               (673)

          Change in current assets and liabilities:
              Decrease (increase) in
                  Receivables from regulated investment companies.....              (3,616)              (2,079)             (2,471)
                  Receivables.........................................             (11,634)               2,734              (5,168)
                  Loans receivable available for sale.................               1,703               (7,891)             (5,152)
                  Prepaid expenses....................................                  42                1,065              (2,539)

              Increase (decrease) in
                  Accounts payable....................................                 (65)                (389)              1,821
                  Accrued compensation................................               6,417                  779                (397)
                  Accrued discontinued operations disposal costs......                (189)               7,417                  --
                  Accrued proprietary fund services...................               3,064                4,065               1,383
                  Other accrued liabilities...........................               8,189                3,493               1,186
                  Deferred revenue....................................               2,035                 (672)              1,528
                                                                                  --------              -------             ------- 

                                                        
              Total adjustments.......................................              23,062               26,474               5,168
                                                                                  --------              -------             ------- 

 
           NET CASH PROVIDED BY OPERATING ACTIVITIES..................            $ 49,906              $33,285             $24,352
- ------------------------------------------------------------------------------------------------------------------------------------

</TABLE>

The accompanying notes are an integral part of these statements.

                                      30
<PAGE>
 
<TABLE>
<CAPTION>
Consolidated Statements of Cash Flows                                                                        SEI Investments Company
(In thousands)                                                                                                      and Subsidiaries


                                            Year Ended December 31,                1997                  1996                  1995
- ------------------------------------------------------------------------------------------------------------------------------------

<S>                                                                       <C>                  <C>                    <C> 
CASH FLOWS FROM INVESTING ACTIVITIES:
 

     Additions to property and equipment...........................              (12,955)              (33,060)              (8,611)
     Additions to capitalized software.............................               (8,096)              (10,668)              (2,999)
     Proceeds from sale (purchase) of investments available for sale                  --                 5,536               (5,361)
     Other.........................................................                 (803)               (3,738)                (961)
                                                                                --------              --------             -------- 

 
 
          NET CASH USED IN INVESTING ACTIVITIES....................              (21,854)              (41,930)             (17,932)

 
CASH FLOWS FROM FINANCING ACTIVITIES:
 
     Proceeds from issuance of long-term debt......................               35,000                    --                   --
     Proceeds from (payment on) line of credit.....................              (20,000)               20,000                   --
     Purchase and retirement of common stock.......................              (43,620)               (9,770)             (18,378)
     Proceeds from issuance of common stock........................                9,069                 5,416                5,377
     Payment of dividends..........................................               (4,777)               (4,090)              (3,395)
                                                                                --------              --------             --------
 
 
          NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES......              (24,328)               11,556              (16,396)
                                                                                --------              --------             --------
 
 
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS...............                3,724                 2,911               (9,976)

 
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR.......................               13,167                10,256               20,232
                                                                                --------              --------             --------
 
 
CASH AND CASH EQUIVALENTS, END OF YEAR.............................             $ 16,891              $ 13,167             $ 10,256
- -----------------------------------------------------------------------------------------------------------------------------------
</TABLE>

The accompanying notes are an integral part of these statements.


                                      31
<PAGE>
 
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS               SEI Investments Company
                                                                and Subsidiaries

NOTE 1 - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES:

     NATURE OF OPERATIONS - SEI Investments Company (the "Company") is organized
     around its two primary business lines:  Investment Technology and Services
     and Asset Management.  The Investment Technology and Services segment
     provides trust accounting and management information services through the
     Company's 3000 product line, administration and distribution services to
     proprietary mutual funds, and back-office trust processing.  The principal
     market for these products and services are trust departments of banks
     located in the United States.  The Asset Management segment provides
     investment solutions through various investment products and services
     including the Company's Family of Funds, liquidity funds and services, and
     brokerage and consulting services.  Principal markets for these products
     and services include trust departments of banks, investment advisors,
     corporations, high-net-worth individuals, and money managers located in the
     United States and Canada.  Based on 1997 revenues, the Investment
     Technology and Services segment accounted for 62 percent of the Company's
     consolidated revenues and the Asset Management segment accounted for 38
     percent of the Company's consolidated revenues.

     PRINCIPLES OF CONSOLIDATION - The Consolidated Financial Statements include
     the accounts of the Company and its wholly owned subsidiaries. The
     Company's principal subsidiaries are SEI Investments Distribution Company
     ("SIDCO"), formerly SEI Financial Services Company, SEI Investments
     Management Corporation ("SIMC"), formerly SEI Financial Management
     Corporation, and SEI Trust Company. All intercompany accounts and
     transactions have been eliminated.

     CASH AND CASH EQUIVALENTS - At December 31, 1997 and 1996, Cash and cash
     equivalents included $10,436,000 and $11,783,000, respectively, primarily
     invested in SEI Tax Exempt Trust, one of several mutual funds sponsored by
     SIMC. Interest and dividend income for 1997, 1996, and 1995 was $983,000,
     $808,000, and $1,019,000, respectively (See Note 13).

     PROPERTY AND EQUIPMENT - Property and Equipment on the accompanying
     Consolidated Balance Sheets consist of the following:

<TABLE>
<CAPTION>
                                                                                                                  ESTIMATED
                                                                                                                USEFUL LIVES
                                                                       1997                         1996         (IN YEARS)
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                                                           <C>                         <C>                   <C>
Equipment...............................................          $ 42,376,000                 $ 40,390,000          3 to 5
Buildings...............................................            27,940,000                   25,907,000        25 to 39
Land....................................................             6,993,000                    6,730,000             N/A
Purchased software......................................             9,181,000                    9,397,000               3
Furniture and fixtures..................................             9,790,000                    9,030,000          3 to 5
Leasehold improvements..................................             5,344,000                    5,294,000      Lease Term
                                                                  ------------                 ------------
                                                                   101,624,000                   96,748,000
Less:  Accumulated depreciation
  and amortization......................................           (49,493,000)                 (48,128,000)
                                                                  ------------                 ------------ 
Property and Equipment, net.............................          $ 52,131,000                 $ 48,620,000
- ------------------------------------------------------------------------------------------------------------------------------------

</TABLE>

     Property and Equipment are stated at cost, which includes interest on funds
     borrowed to finance the construction of the Company's corporate campus.
     Depreciation and amortization are computed using the straight-line method
     over the estimated useful life of each asset.  Expenditures for renewals
     and betterments are capitalized, while maintenance and repairs are charged
     to expense when incurred.


                                      32
<PAGE>
 
     In late 1994, the Company purchased 90 acres of land for construction of
     the Company's new corporate campus. Construction was completed in late 1996
     which coincided with the expiration of the Company's leases for corporate
     facilities. The relocation to the new corporate campus was completed as of
     December 31, 1996. All costs associated with the design and construction of
     the corporate campus are included in Buildings. Land includes the initial
     purchase price and various land improvements which are not depreciable.
     Equipment, Furniture and Fixtures, Leasehold Improvements, and their
     corresponding accumulated depreciation and amortization amounts associated
     with the Company's old facilities, were written-off as of December 31,
     1996. The net book value of these assets was immaterial.

     CUSTOMER LISTS - Customer Lists represent the value assigned to customer
     relationships obtained in various acquisitions.  Customer Lists are
     amortized on a straight-line basis over 10 years.  Amortization expense for
     1997 was $291,000.  There was no amortization expense in 1996 or 1995.  The
     Company evaluates the realizability of intangible assets based on estimates
     of undiscounted future cash flows over the remaining useful life of the
     asset.  If the amount of such estimated undiscounted future cash flow is
     less than the net book value of the asset, the asset is written down to its
     net realizable value.  As of December 31, 1997, no such write-down was
     required.

     STATEMENTS OF CASH FLOWS - For purposes of the Consolidated Statements of
     Cash Flows, the Company considers investment instruments purchased with an
     original maturity of three months or less to be cash equivalents.

     Supplemental disclosures of cash paid/received during the year is as
     follows:

<TABLE>
<CAPTION>
                                                                              1997              1996                1995
                                                                          ----------         ----------         -----------
 
<S>                                                                       <C>               <C>                <C>
     Interest paid............................................            $1,499,000         $  794,000         $   211,000
     Interest and dividends received..........................            $  957,000         $  876,000         $ 1,024,000
     Income taxes paid (Federal and state)....................            $8,667,000         $5,525,000         $12,846,000
</TABLE>

     REVENUE RECOGNITION - Principal sources of revenues are information
     processing and software services, management, administration, and
     distribution of mutual funds, brokerage and consulting services, and other
     asset management products and services.  Revenues from these services are
     recognized in the periods in which the services are performed.  Cash
     received by the Company in advance of the performance of services is
     deferred and recognized as revenue when earned.

     INCOME TAXES - The Company accounts for income taxes in accordance with
     Statement of Financial Accounting Standards No. 109, "Accounting for Income
     Taxes" ("SFAS 109").  Under SFAS 109, the liability method is used for
     income taxes.  Under this method, deferred tax assets and liabilities are
     determined based on differences between the financial reporting and tax
     basis of assets and liabilities and are measured using enacted tax rates
     and laws that are expected to be in effect when the differences reverse
     (See Note 11).

     FOREIGN CURRENCY TRANSLATION - The assets and liabilities of foreign
     operations are translated into U.S. dollars using the rates of exchange at
     year end.  The results of operations are translated into U.S. dollars at
     the average daily exchange rates for the period.  All foreign currency
     transaction gains and losses are included in income in the periods in which
     they occur, and are immaterial for each of the three years in the period
     ended December 31, 1997.



                                      33
<PAGE>
 
     CAPITALIZED SOFTWARE - The Company accounts for software development costs
     in accordance with Statement of Financial Accounting Standards No. 86,
     "Accounting for the Costs of Computer Software to Be Sold, Leased, or
     Otherwise Marketed" ("SFAS 86"). Under SFAS 86, costs incurred to create a
     computer software product are charged to research and development expense
     as incurred until technological feasibility has been established. The
     Company establishes technological feasibility upon completion of a detailed
     program design. At that point, computer software costs are capitalized
     until the product is available for general release to customers. The
     establishment of technological feasibility and the ongoing assessment of
     recoverability of capitalized software development costs require
     considerable judgment by management with respect to certain external
     factors, including, but not limited to, anticipated future revenues,
     estimated economic life, and changes in technology.

     Amortization begins when the product is released.  Capitalized software
     development costs are amortized on a product-by-product basis using the
     straight-line method over the estimated economic life of the product or
     enhancement, which is primarily three to ten years, with a weighted average
     remaining life of 7.4 years.

     Capitalized software development costs consist primarily of salary,
     consulting, and computer costs incurred to develop new products and
     enhancements to existing products.  During 1997, 1996, and 1995, software
     development costs of $8,096,000, $10,668,000, and $2,999,000 were
     capitalized, respectively.  Amortization expense was $3,233,000,
     $1,447,000, and $1,522,000 in 1997, 1996, and 1995, respectively, and is
     included in Operating and development expense on the accompanying
     Consolidated Statements of Operations.

     Total research and development costs, including capitalized software, were
     $22,500,000, $26,254,000, and $16,744,000 in 1997, 1996, and 1995,
     respectively.

     EARNINGS PER SHARE - In February 1997, the Financial Accounting Standards
     Board issued Statement of Financial Accounting Standards No. 128, "Earnings
     per Share" ("SFAS 128"), which supersedes Accounting Principles Board
     Opinion No. 15.  Pursuant to SFAS 128, dual presentation of basic and
     diluted earnings per common share is required on the face of the statements
     of operations for companies with complex capital structures.  Basic
     earnings per common share, which replaced primary earnings per common
     share, is calculated by dividing net income available to common
     shareholders by the weighted average number of common shares outstanding
     for the period.  Diluted earnings per common share, which replaced fully
     diluted earnings per common share, reflects the potential dilution from the
     exercise or conversion of securities into common stock, such as stock
     options.  If the inclusion of common stock equivalents has an anti-dilutive
     effect in the aggregate, it is excluded from the diluted earnings per
     common share calculation.  The Company adopted SFAS 128 in its December 31,
     1997 financial statements.  All prior period earnings per common share data
     has been restated to conform with the provisions of SFAS 128.

<TABLE>
<CAPTION>
- ----------------------------------------------------------------------------------------------------------------------------------
                                                                               FOR THE YEAR ENDED DECEMBER 31, 1997
                                                                ------------------------------------------------------------------
                                                                      INCOME                     SHARES                PER SHARE
                                                                    (NUMERATOR)              (DENOMINATOR)              AMOUNT
                                                                -------------------       --------------------       -------------
<S>                                                             <C>                       <C>                        <C>
Basic earnings per common share
     from continuing operations..........................             $26,844,000                 18,315,000                $1.47
                                                                                                                   
Dilutive effect of stock options.........................                      --                    921,000
                                                                      -----------                 ---------- 
Diluted earnings per common share                        
     from continuing operations..........................             $26,844,000                 19,236,000                $1.40
- ----------------------------------------------------------------------------------------------------------------------------------
</TABLE>

                                      34
<PAGE>
 
<TABLE>
<CAPTION>
 
- ----------------------------------------------------------------------------------------------------------------------------------
                                                                               FOR THE YEAR ENDED DECEMBER 31, 1996
                                                                ------------------------------------------------------------------
                                                                      INCOME                     SHARES               PER SHARE
                                                                    (NUMERATOR)              (DENOMINATOR)              AMOUNT
                                                                -------------------       --------------------      --------------
<S>                                                             <C>                       <C>                       <C>
Basic earnings per common share
     from continuing operations...........................             $23,146,000                 18,497,000                $1.25
                                                          
Dilutive effect of stock options..........................                      --                    867,000
                                                                       -----------                 ----------
Diluted earnings per common share                         
     from continuing operations...........................             $23,146,000                 19,364,000                $1.20
<CAPTION>                                                          
                                                                               FOR THE YEAR ENDED DECEMBER 31, 1995
                                                                ------------------------------------------------------------------
                                                                      INCOME                     SHARES               PER SHARE
                                                                    (NUMERATOR)              (DENOMINATOR)              AMOUNT
                                                                -------------------       --------------------      --------------
Basic earnings per common share                           
     from continuing operations...........................             $21,126,000                 18,607,000                $1.14
                                                          
Dilutive effect of stock options..........................                      --                    947,000
                                                                       -----------                 ----------
Diluted earnings per common share                         
     from continuing operations...........................             $21,126,000                 19,554,000                $1.08
- ----------------------------------------------------------------------------------------------------------------------------------
</TABLE>

     Options to purchase 580,000, 544,000, and 658,000 shares of common stock
     with an average exercise price per share of $42.00, $24.20, and $23.82 were
     outstanding during the years 1997, 1996, and 1995, respectively, but were
     excluded from the diluted earnings per common share calculation because the
     option's exercise price was greater than the average market price of the
     Company's common stock.

     According to SFAS 128, all earnings per common share data previously
     reported has been restated to comply with its provisions.  The effect of
     this accounting change on previously reported earnings per common share
     data is as follows:

<TABLE>
<CAPTION>
 
 ----------------------------------------------------------------------------------------------------------------------------------
                                                                                                 1996           1995
                                                                                                 ----           ----
<S>                                                                                         <C>             <C>
Per common share amounts from continuing operations:
Primary earnings per common share as reported.........................................           $1.20          $1.09
Effect of SFAS 128....................................................................             .05            .05
                                                                                                 -----          -----
Basic earnings per common share as restated...........................................           $1.25          $1.14

                                                                                          
Fully diluted earnings per common share as reported...................................           $1.20          $1.09
Effect of SFAS 128....................................................................             .00           (.01)
                                                                                                 -----          -----
Diluted earnings per common share as restated.........................................           $1.20          $1.08
- -----------------------------------------------------------------------------------------------------------------------------------
</TABLE>

     MANAGEMENT'S USE OF ESTIMATES - The preparation of financial statements in
     conformity with generally accepted accounting principles requires
     management to make estimates and assumptions that affect the reported
     amounts of assets and liabilities and disclosure of contingent assets and
     liabilities at the date of the financial statements and the reported
     amounts of revenues and expenses during the reporting period.  Actual
     results could differ from those estimates.

     RECLASSIFICATIONS - The financial statements for prior years have been
     reclassified to conform with current-year presentation.

                                      35
<PAGE>
 
     NEW ACCOUNTING PRONOUNCEMENTS - In June 1997, the Financial Accounting
     Standards Board issued Statement of Financial Accounting Standards No. 130,
     "Reporting Comprehensive Income" ("SFAS 130"), and Statement of Financial
     Accounting Standards No. 131, "Disclosures about Segments of an Enterprise
     and Related Information" ("SFAS 131").  SFAS 130 establishes standards for
     reporting and presentation of comprehensive income and its components
     (revenues, expenses, gains and losses) in a full set of general-purpose
     financial statements and requires that all items that are required to be
     recognized under accounting standards as components of comprehensive income
     be reported in a financial statement that is presented with equal
     prominence as other financial statements.  SFAS No. 130 is required to be
     adopted for the Company's fiscal year ending December 31, 1998.  The
     adoption of this pronouncement is expected to have no impact on the
     Company's financial position or results of operations.  SFAS 131
     establishes standards for the way that public business enterprises report
     information about operating segments in annual financial statements and
     requires that those enterprises report selected information about operating
     segments in interim financial reports issued to stockholders.  It also
     establishes standards for related disclosures about products and services,
     geographic areas, and major customers.  SFAS 131 is required to be adopted
     for the Company's 1998 year-end financial statements.  The Company is
     currently evaluating the impact, if any, of the adoption of this
     pronouncement on the Company's existing disclosures.


NOTE 2 - DISCONTINUED OPERATIONS:

     In May 1995, the Company's Board of Directors approved a plan of disposal
     for the SEI Capital Resources Division ("CR") and the SEI Defined
     Contribution Retirement Services Division ("DC").  CR provided investment
     performance evaluation services, consulting services, and brokerage
     services to employee benefit plan sponsors and investment advisors in the
     United States.  DC provided administrative and processing services,
     recordkeeping services, and employee retirement planning materials for use
     by defined contribution plans.  In 1996, the Company completed the transfer
     of DC's full service recordkeeping operations to KPMG Peat Marwick.

     CR and DC were being accounted for together as discontinued operations with
     a measurement date of May 31, 1995. The accompanying Consolidated Financial
     Statements reflect the operating results and balance sheet items of the
     discontinued operations separately from continuing operations. At the
     measurement date, the Company expected that the sale of CR would have
     resulted in a gain on the disposal of CR's assets which would have been
     sufficient to offset any losses incurred by DC. As a result, no provision
     for estimated losses was established for the period from the measurement
     date to the estimated disposal date. In the fourth quarter of 1996, based
     on current information, management of the Company concluded that any
     proceeds received from a possible sale of CR would not be sufficient to
     offset the remaining net assets of CR and DC. The Company, therefore,
     recorded a charge of $16,335,000 ($.88 basic earnings per common share and
     $.85 diluted earnings per common share), net of income tax benefit of
     $5,139,000.

     The charge of $16,335,000 recorded in 1996 on the accompanying Consolidated
     Statements of Operations included the operating losses incurred by CR and
     DC from June 1, 1995 to December 31, 1996, the complete write-off of CR and
     DC's non-recoverable assets, and a provision for the disposal of
     discontinued operations.  The non-recoverable assets were comprised of
     goodwill, customer lists, equipment, and furniture and fixtures.  The
     provision for the disposal of discontinued operations included accruals for
     future operating losses and other future commitments.  The Company's
     management believes that the provision established in the fourth quarter of
     1996 is sufficient to cover all future costs associated with CR.  This
     provision is reflected in Accrued discontinued operations disposal costs on
     the accompanying Consolidated Balance Sheets.

     In July 1997, the Company entered into a definitive agreement to sell the
     remaining net assets of CR to a private investment firm.  The deal was
     closed on December 31, 1997.  Based upon the terms of the agreement, the
     Company received a specified amount at closing which was subject to
     adjustment.  The adjustment to the purchase price consisted of a working
     capital adjustment plus an amount representing the net amount of cash
     activity from CR's operations during the period between August 18, 1997 and
     December 31, 1997.  Additionally, the Company received a note from the
     acquiring firm which is due in two installments over the next two years. No
     additional gain or loss has been recorded at December 31, 1997. Any
     additional gain will be recorded when realized.

                                      36
<PAGE>
 
NOTE 3 - RECEIVABLES:

     Receivables on the accompanying Consolidated Balance Sheets consist of the
     following:

<TABLE>
<CAPTION>
                                                                         1997                         1996
- ----------------------------------------------------------------------------------------------------------------------------------
<S>                                                             <C>                         <C>
Trade receivables............................................       $16,219,000                  $10,124,000
Fees earned, not received....................................         2,308,000                    3,511,000
Fees earned, not billed......................................        13,865,000                    7,273,000
                                                                    -----------                  -----------
                                                             
                                                                     32,392,000                   20,908,000
                                                             
Less:  Allowance for doubtful accounts.......................        (1,200,000)                  (1,350,000)
                                                                    -----------                  -----------
                                                             
                                                                    $31,192,000                  $19,558,000
- ----------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                        
     Fees earned, not received represent brokerage commissions earned but not
     yet collected.  Fees earned, not billed represent cash receivables earned
     but unbilled and result from timing differences between services provided
     and contractual billing schedules.

     Receivables from regulated investment companies on the accompanying
     Consolidated Balance Sheets represent fees collected from the Company's
     wholly owned subsidiaries, SIDCO and SIMC, for distribution, investment
     advisory, and administration services provided by these subsidiaries to
     various regulated investment companies sponsored by the Company (See Note
     13).


NOTE 4 - LOANS RECEIVABLE AVAILABLE FOR SALE:

     Loans receivable available for sale represent loans which were purchased
     through SEI Capital AG, which is based in Zurich.  These receivables are
     reported at the lower of cost or market, and any difference between the
     purchase price and the related loan principal amount is recognized as an
     adjustment of the yield over the life of the loan using the effective
     interest method.  Each loan receivable involves various risks, including,
     but not limited to, country, interest rate, credit, and liquidity risk.
     Management evaluates and monitors these risks on a continuing basis to
     ensure that these loan receivables are recorded at their realizable value.
     This evaluation is based upon management's best estimates and the amounts
     the Company will ultimately realize could differ from these estimates.  The
     Company intends to sell these loans within a year from the balance sheet
     date.


NOTE 5 - INVESTMENTS AVAILABLE FOR SALE:

     Investments available for sale consist of mutual funds sponsored by the
     Company which are primarily invested in equity securities.  The Company
     accounts for investments in marketable securities pursuant to Statement of
     Financial Accounting Standards No. 115, "Accounting for Certain Investments
     in Debt and Equity Securities" ("SFAS 115").  SFAS 115 requires that debt
     and equity securities classified as available for sale be reported at
     market value.  Unrealized holding gains and losses, net of income taxes,
     are reported as a separate component of Shareholders' equity.  Realized
     gains and losses, as determined on a specific identification basis, are
     reported separately on the accompanying Consolidated Statements of
     Operations.

                                      37
<PAGE>
 
     At December 31, 1997 and 1996, Investments available for sale had an
     aggregate cost of $1,000,000.  These securities had an aggregate market
     value of $876,000 with gross unrealized losses of $124,000 at December 31,
     1997.  At that date, the unrealized holding losses of $75,000 (net of
     income tax benefit of $49,000) were reported as a separate component of
     Shareholders' equity on the accompanying Consolidated Balance Sheets.
     There were no unrealized holding gains as of December 31, 1997.  At
     December 31, 1996, the fair value of these securities approximated their
     original cost and accordingly, no unrealized holding gains or losses were
     recorded.

     In 1996, proceeds from the sale of securities classified as Investments
     available for sale were $6,536,000.  The aggregate cost of these securities
     prior to sale was $5,439,000, resulting in a realized gain of $1,097,000.
     This gain is reflected in Gain on sale of investments available for sale on
     the accompanying Consolidated Statements of Operations.  The Company did
     not sell any of its investments in 1997.


NOTE 6 - LINE OF CREDIT:

     The Company has a line of credit agreement (the "Agreement") with its
     principal lending institution which provides for borrowings of up to
     $50,000,000.  The Agreement ends on May 31, 1998, at which time the
     outstanding principal balance, if any, becomes due unless the Agreement is
     extended.  Management believes the Agreement will be extended.  The line of
     credit, when utilized, accrues interest at the Prime rate or three-tenths
     percent above the London Interbank Offered Rate.  The Company is obligated
     to pay a commitment fee equal to one-tenth percent per annum on the average
     daily unused portion of the commitment.  Certain covenants under the
     Agreement require the Company to maintain specified levels of net worth and
     places certain restrictions on investments.

     The maximum month-end amount of debt outstanding on the Company's line of
     credit for the years ended December 31, 1997 and 1996 was $30,000,000 and
     $20,000,000, respectively.  Interest expense, including commitment fees, on
     the Company's line of credit was $302,000, $794,000, and $255,000 based on
     a weighted average interest rate of approximately 5.8 percent, 6.0 percent,
     and 6.6 percent for the years ended December 31, 1997, 1996, and 1995,
     respectively.


NOTE 7 - LONG-TERM DEBT:

     On February 24, 1997, the Company signed a Note Purchase Agreement
     authorizing the issuance and sale of $20,000,000 of 7.20% Senior Notes and
     $15,000,000 of 7.27% Senior Notes (collectively, the "Notes") in a private
     offering with certain financial institutions.  The Notes are unsecured with
     final maturities ranging from 10 to 15 years with an average life of 7 to
     10 years.  The proceeds from the Notes were used to repay the outstanding
     balance on the Company's line of credit at that time.  The Note Purchase
     Agreement contains various covenants, including limitations on
     indebtedness, maintenance of minimum net worth levels, and restrictions on
     certain investments.  In addition, the agreement limits the Company's
     ability to merge or consolidate, and to sell certain assets.  None of these
     covenants negatively affect the Company's liquidity or capital resources.
     Principal payments on the Notes are made annually from the date of issuance
     while interest payments are made semi-annually.  The current portion of the
     Notes amounted to $2,000,000 at December 31, 1997 which was paid in
     February 1998.  The Company had no long-term debt at December 31, 1996.
     The carrying amount of the Company's long-term debt approximates its fair
     value.

     Annual maturities of long-term debt are: $2,000,000 per year through the
     year 2002; $4,000,000 per year for the years 2003 through 2007; $1,000,000
     per year for the years 2008 through 2012. Interest expense relating to the
     Company's long-term debt was $2,186,000 for the year ended December 31,
     1997.

                                      38
<PAGE>
 
NOTE 8 - SHAREHOLDERS' EQUITY:

     STOCK-BASED COMPENSATION PLANS - The Company has several stock option plans
     under which non-qualified and incentive stock options for common stock are
     available for grant to officers, directors, and key employees.  The options
     granted and the option prices are established by the Board of Directors in
     accordance with the terms of the plans.  The Board of Directors has
     reserved an aggregate 13,105,000 shares for grant under these plans.  All
     options outstanding were granted at prices equal to the fair market value
     of the stock on the date of grant and expire 10 years after the date of
     grant.  Generally, all options vest ratably over a four year period, with
     the exception of those granted in 1997 which vest ratably upon the
     Company's attainment of specific earnings levels or seven years.

     The Company accounts for its stock option plans in accordance with APB
     Opinion No. 25, "Accounting for Stock Issued to Employees".  Accordingly,
     no compensation expense has been recognized.  In 1995, the Financial
     Accounting Standards Board issued Statement of Financial Accounting
     Standards No. 123, "Accounting for Stock-Based Compensation" ("SFAS 123").
     SFAS 123 establishes a fair value based method of accounting for stock-
     based compensation plans.  SFAS 123 requires that an employer's financial
     statements include certain disclosures about stock-based employee
     compensation arrangements regardless of the method used to account for the
     plan.  Had the Company recognized compensation cost for its stock option
     plans consistent with the provisions of SFAS 123, the Company's net income
     and earnings per common share would have been reduced to the following pro
     forma amounts:

<TABLE>
<CAPTION>
                                                                                  1997              1996                 1995
- ---------------------------------------------------------------------------------------------------------------------------------
<S>                                                                          <C>                  <C>                 <C>
Net income:
     As reported...................................................              $26,844            $6,811             $19,184
     Pro forma.....................................................              $25,334            $6,201             $18,958
 
Basic earnings per common share:
     As reported...................................................              $  1.47            $  .37             $  1.03
     Pro forma.....................................................              $  1.38            $  .34             $  1.02
 
Diluted earnings per common share:
     As reported...................................................              $  1.40            $  .35             $   .98
     Pro forma.....................................................              $  1.32            $  .32             $   .97
- --------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                        
     Because the SFAS 123 method of accounting has not been applied to options
     granted prior to January 1, 1995, the resulting pro forma compensation cost
     may not be representative of that to be expected in future years.

     The weighted average fair value of the stock options granted during 1997,
     1996, and 1995 was $59.71, $31.31, and $31.75, respectively.  The fair
     value of each option grant is estimated on the date of grant using the
     Black-Scholes option pricing model with the following weighted average
     assumptions:

<TABLE>
<CAPTION>
                                                                           1997                 1996                1995
- --------------------------------------------------------------------------------------------------------------------------------
<S>                                                                   <C>                  <C>                  <C>
Risk-free interest rate............................................        6.55%                6.70%               6.35%
Expected dividend yield............................................        1.00%                1.00%               1.00%
Expected life......................................................       7 Years              7 Years             7 Years
Expected volatility................................................       37.36%               34.87%              35.31%
- --------------------------------------------------------------------------------------------------------------------------------
</TABLE>
                                        
                                      39
<PAGE>
 
     Certain information relating to the Company's stock option plans for 1997,
     1996, and 1995 is summarized as follows:

<TABLE>
<CAPTION>
- ----------------------------------------------------------------------------------------------------------------------------
                                                                                                               Weighted
                                                                                    Number of                  Average
                                                                                      Shares                Exercise Price
                                                                               --------------------       ------------------
 
<S>                                                                            <C>                        <C>
Balance as of December 31, 1994..........................................            4,530,000                 $12.78
Granted..................................................................              209,000                  22.09
Exercised................................................................             (464,000)                  9.42
Expired or canceled......................................................             (148,000)                 18.03
                                                                                     ---------
 
Balance as of December 31, 1995..........................................            4,127,000                  13.44
Granted..................................................................              365,000                  21.65
Exercised................................................................             (554,000)                  8.02
Expired or canceled......................................................              (82,000)                 20.44
                                                                                     ---------
 
Balance as of December 31, 1996..........................................            3,856,000                  14.85
Granted..................................................................              622,000                  40.55
Exercised................................................................             (625,000)                 12.83
Expired or canceled......................................................              (58,000)                 22.25
                                                                                     ---------
 
Balance as of December 31, 1997..........................................            3,795,000                 $19.27
 
Exercisable as of December 31, 1997......................................            2,725,000                 $14.11
 
Available for future grant as of December 31, 1997.......................              342,000                     --
- ----------------------------------------------------------------------------------------------------------------------------
</TABLE>

     As of December 31, 1996 and 1995, there were 3,010,000 shares and 3,157,000
     shares exercisable, respectively.  The expiration dates for options at
     December 31, 1997 range from April 4, 1998 to December 8, 2007, with a
     weighted average remaining contractual life of 5.8 years.

     The following table summarizes information relating to all options
     outstanding at December 31, 1997:

<TABLE>
<CAPTION>
- ----------------------------------------------------------------------------------------------------------------------------------
                                      Options Outstanding                        Options Exercisable
                                      at December 31, 1997                      at December 31, 1997
                              ---------------------------------         -------------------------------------
                                                                                                                     Weighted
                                                    Weighted                                      Weighted            Average
       Range of                                     Average                                       Average            Remaining
       Exercise               Number                Exercise                Number                Exercise          Contractual
       Prices                  of                    Price                   of                    Price               Life
     (Per Share)              Shares               (Per Share)              Shares               (Per Share)          (Years)
- ----------------             --------              -----------            -----------            ------------      -------------
<S>                         <C>                    <C>                    <C>                    <C>               <C>
 $ 7.75 - $13.00            1,513,000                $ 9.79                1,513,000                $ 9.79             2.9
  13.75 -  18.50              786,000                 16.62                  707,000                 16.44             5.9
  19.50 -  26.25              916,000                 22.81                  505,000                 23.79             7.7
  42.00                       580,000                 42.00                       --                    --             9.9
                            ---------                                      ---------
                            3,795,000                                      2,725,000
- --------------------------------------------------------------------------------------------------------------------------------
</TABLE>

                                      40
<PAGE>
 
     EMPLOYEE STOCK PURCHASE PLAN - The Company has an employee stock purchase
     plan that provides for offerings of common stock to eligible employees at a
     price equal to 85 percent of the fair market value of the stock at the end
     of the stock purchase period, as defined.  The Company has reserved 800,000
     shares for issuance under this plan.  At December 31, 1997, 733,000
     cumulative shares have been issued.

     COMMON STOCK BUYBACK - The Board of Directors has authorized the purchase
     of the Company's common stock on the open market or through private
     transactions of up to an aggregate of $228,365,000, including an additional
     authorization in early 1998.  Through December 31, 1997, a total of
     14,636,000 shares at an aggregate cost of $209,122,000 have been purchased
     and retired.  The Company purchased 1,403,000 shares at a cost of
     $43,620,000 during 1997.

     The Company immediately retires its common stock when purchased.  Upon
     retirement, the Company reduces Capital in excess of par value for the
     average capital per share outstanding and the remainder is charged against
     Retained earnings.  If the Company reduces its Retained earnings to zero,
     any subsequent purchases of common stock will be charged entirely to
     Capital in excess of par value.

     SHAREHOLDERS' RIGHTS PLAN - On December 19, 1988, the Company's Board of
     Directors declared a distribution of one right for each outstanding common
     share of the Company to shareholders of record at the close of business on
     January 4, 1989. In addition, any new common shares issued after January 4,
     1989 will receive one right for each common share. Each right entitles
     shareholders to buy one-fourhundredth of a share of Series A Junior
     Participating Preferred Stock at an exercise price of $65 per share. The
     rights will not be exercisable until a person or group owns more than 40
     percent of the Company's common stock, acquires 20 percent or more of the
     Company's common stock after December 19, 1988 (the "Stock Acquisition
     Date"), or a person or group begins a tender offer for 30 percent or more
     of the Company's common stock. The rights, which do not have voting rights,
     expire on December 19, 1998, and may be redeemed by the Company at a price
     of $.01 per right at any time until 10 days following the Stock Acquisition
     Date. In the event that the Company is acquired in a merger or other
     business combination transaction, each holder of a right will have the
     right to receive, upon exercise, common shares of the acquiring company
     having a value equal to two times the exercise price of the right.

     DIVIDENDS - On May 14, 1997, the Board of Directors declared a cash
     dividend of $.14 per share on the Company's common stock, which was paid on
     June 27, 1997, to shareholders of record on June 12, 1997. On December 4,
     1997, the Board of Directors declared a cash dividend of $.14 per share on
     the Company's common stock, which was paid on January 21, 1998, to
     shareholders of record on December 31, 1997.

     The dividends declared in 1997 and 1996 were $5,045,000 and $4,468,000,
     respectively.  The Board of Directors has indicated its intention to pay
     future dividends on a semiannual basis.


NOTE 9 - EMPLOYEE BENEFIT PLAN:

     The Company has a tax-qualified defined contribution plan (the "Plan").
     The Plan provides retirement benefits, including provisions for early
     retirement and disability benefits, as well as a tax-deferred savings
     feature.  After satisfying certain requirements, participants are vested in
     employer contributions at the time the contributions are made.  All Company
     contributions are discretionary and are made from available profits.  The
     Company contributed $1,412,000, $1,345,000, and $1,065,000 to the Plan in
     1997, 1996, and 1995, respectively.

                                      41
<PAGE>
 
NOTE 10 - COMMITMENTS AND CONTINGENCIES:

     The Company has entered into various operating leases for facilities, data
     processing equipment, and software.  Some of these leases contain
     escalation clauses for increased taxes and operating expenses.  Rent
     expense was $16,192,000, $17,527,000, and $16,570,000 in 1997, 1996, and
     1995, respectively.

     Aggregate noncancellable minimum lease commitments at December 31, 1997
     are:

<TABLE>
<CAPTION>
- -----------------------------------------------------------------------------------------------------
<S>                                                                                 <C>
1998..........................................................................            $ 8,936,000
1999..........................................................................              4,848,000
2000..........................................................................              3,686,000
2001..........................................................................              2,807,000
2002..........................................................................                452,000
2003 and thereafter...........................................................                115,000
                                                                                          -----------
 
                                                                                          $20,844,000
- -----------------------------------------------------------------------------------------------------
</TABLE>

     The Company has future lease obligations relating to office facilities
     being used for its discontinued operations.  The Company established a
     provision for future lease commitments relating to these facilities which
     is included in Accrued discontinued operations disposal costs on the
     accompanying Consolidated Balance Sheets.  Management of the Company
     believes this provision will be adequate to cover all future costs incurred
     relating to these facilities.

     The Company, through SEI AG, has commitments for $4,826,000 to purchase
     additional Loans receivable available for sale. In the normal course of
     business, SEI AG will time these purchases with the sales of other loans,
     thereby relieving the Company of any additional outlay of cash associated
     with these commitments (See Note 4).

     In the normal course of business, the Company is party to various claims
     and legal proceedings.  Although the ultimate outcome of these matters is
     presently not determinable, management, after consultation with legal
     counsel, does not believe that the resolution of these matters will have a
     material adverse effect upon the Company's financial position or results of
     operations.


NOTE 11 - INCOME TAXES:

     Income taxes from continuing operations consist of the following:

<TABLE>
<CAPTION>
                                   YEAR ENDED DECEMBER 31,                1997                    1996                   1995
- --------------------------------------------------------------------------------------------------------------------------------
<S>                                                              <C>                     <C>                    <C>
Current
    Federal...............................................             $15,544,000             $10,491,000           $13,476,000
    State.................................................                 726,000                 486,000             1,577,000
                                                                       -----------             -----------           -----------
 
                                                                        16,270,000              10,977,000            15,053,000
                                                                       -----------             -----------           -----------
 
Deferred, including current deferred
    Federal...............................................                 607,000               2,963,000              (682,000)
    State.................................................                 286,000                 858,000                10,000
                                                                       -----------             -----------           -----------
 
                                                                           893,000               3,821,000              (672,000)
                                                                       -----------             -----------           -----------
 
Total income taxes from continuing
    operations............................................             $17,163,000             $14,798,000           $14,381,000
- --------------------------------------------------------------------------------------------------------------------------------
</TABLE>

                                      42
<PAGE>
 
     The effective income tax rate from continuing operations differs from the
     Federal income tax statutory rate due to the following:
 
<TABLE>
<CAPTION>
                                      YEAR ENDED DECEMBER 31,                 1997                  1996                   1995
- -------------------------------------------------------------------------------------------------------------------------------
 
<S>                                                                <C>                   <C>               <C>
Statutory rate...............................................                 35.0%                 35.0%                  35.0%
State taxes, net of Federal tax benefit......................                  1.3                   2.3                    2.5
Other, net...................................................                  2.7                   1.7                    3.0
                                                                              ----                  ----                   ----
 
                                                                              39.0%                 39.0%                  40.5%
 
 --------------------------------------------------------------------------------------------------------------------------------
</TABLE>
     Deferred income taxes for 1997, 1996, and 1995 reflect the impact of
     "temporary differences" between the amount of assets and liabilities for
     financial reporting purposes and such amounts as measured by tax laws and
     regulations.  Principal items comprising the deferred income tax provision
     from continuing operations are as follows:

<TABLE>
<CAPTION> 
                                   YEAR ENDED DECEMBER 31,            1997                       1996                       1995
- ----------------------------------------------------------------------------------------------------------------------------------
<S>                                                             <C>                         <C>                        <C>
Difference in financial reporting and income
     tax depreciation methods.............................        $   996,000                 $  598,000                  $(555,000)
Reserves not currently deductible.........................            (73,000)                   (28,000)                   213,000
Capitalized software currently deductible for
     tax purposes, net of amortization....................          1,662,000                  3,461,000                    512,000
State deferred income taxes...............................            186,000                    558,000                      6,000
Revenue and expense recognized in
     different periods for financial reporting
     and income tax purposes..............................         (1,508,000)                  (724,000)                  (657,000)
Other, net................................................           (370,000)                   (44,000)                  (191,000)
                                                                  -----------                 ----------                  ---------
 
                                                                  $   893,000                 $3,821,000                  $(672,000)

- -----------------------------------------------------------------------------------------------------------------------------------
</TABLE>

     The net deferred income tax liability is comprised of the following:

<TABLE>
<CAPTION>
                                      YEAR ENDED DECEMBER 31,                 1997                        1996
- -----------------------------------------------------------------------------------------------------------------
 
Current deferred income taxes:
<S>                                                                <C>                      <C>
     Gross assets............................................             $ 6,461,000                 $ 4,689,000
     Gross liabilities.......................................                (124,000)                   (162,000)
                                                                          -----------                 -----------
                                                                            6,337,000                   4,527,000
                                                                          -----------                 -----------
Long-term deferred income taxes:
     Gross assets............................................                 243,000                   1,108,000
     Gross liabilities.......................................              (8,041,000)                 (6,084,000)
                                                                          -----------                 -----------
                                                                           (7,798,000)                 (4,976,000)
                                                                          -----------                 -----------

Net deferred income tax liability............................             $(1,461,000)                $  (449,000)
- -----------------------------------------------------------------------------------------------------------------
</TABLE>

     The Company did not record any valuation allowance against deferred tax
     assets at December 31, 1997 and 1996.

                                      43
<PAGE>
 
     The tax effect of significant temporary differences representing deferred
     tax assets (liabilities) is as follows:

<TABLE>
<CAPTION>
                                   YEAR ENDED DECEMBER 31,                  1997                       1996
- ---------------------------------------------------------------------------------------------------------------
 
<S>                                                             <C>                        <C>
Difference in financial reporting and income
     tax depreciation methods.............................               $    52,000                $   846,000
Reserves not currently deductible.........................                   750,000                    945,000
Capitalized software currently deductible for
     tax purposes, net of amortization....................                (8,088,000)                (6,082,000)
State deferred income taxes...............................                   324,000                    223,000
Revenue and expense recognized in
     different periods for financial reporting
     and income tax purposes..............................                 5,388,000                  3,277,000
Unrealized holding gain on investments....................                    48,000                    303,000
Other, net................................................                    65,000                     39,000
                                                                         -----------                -----------
 
                                                                         $(1,461,000)               $  (449,000)
- ---------------------------------------------------------------------------------------------------------------
</TABLE>


Note 12 - Segment Information:

     The Company defines its business segments to reflect the Company's focus
     around two primary business lines:  Investment Technology and Services and
     Asset Management.  The Investment Technology and Services segment consists
     of the Company's trust technology, proprietary mutual fund, and back-office
     trust processing businesses.  The Asset Management segment consists of the
     Company's liquidity management, asset management, mutual fund, and
     brokerage and consulting businesses.

     The following tables highlight certain financial information from
     continuing operations about each of the Company's segments for the years
     ended December 31, 1997, 1996, and 1995.

<TABLE>
<CAPTION>
                                                       Investment
                                                       Technology      Asset        General and
1997                                                  and Services   Management   Administrative   Consolidated
- ---------------------------------------------------------------------------------------------------------------
<S>                                                   <C>           <C>           <C>              <C>
 
Revenues............................................  $182,509,000  $110,240,000                   $292,749,000
                                                      ------------  ------------                   ------------
 
Operating profit....................................  $ 46,126,000  $ 13,317,000    $(13,931,000)  $ 45,512,000
                                                      ------------  ------------    ------------  
 
Interest income.....................................                                               $    983,000
Interest expense....................................                                               $ (2,488,000)
                                                                                                   ------------
 
Income from continuing operations
   before income taxes..............................                                               $ 44,007,000
                                                                                                   ------------
 
Depreciation and amortization.......................  $  9,973,000  $  3,371,000    $    724,000   $ 14,068,000
                                                      ------------  ------------    ------------   ------------
 
Capital expenditures................................  $  9,848,000  $  2,106,000    $  1,001,000   $ 12,955,000
                                                      ------------  ------------    ------------   ------------
 
Total identifiable assets at
   December 31, 1997................................  $ 89,444,000  $ 64,155,000    $ 15,285,000   $168,884,000
                                                      ------------  ------------    ------------   ------------
- ---------------------------------------------------------------------------------------------------------------
</TABLE>

                                      44
<PAGE>
 
<TABLE>
<CAPTION>
                                                       Investment
                                                       Technology      Asset       General and
1996                                                  and Services  Management   Administrative   Consolidated
- --------------------------------------------------------------------------------------------------------------
<S>                                                   <C>           <C>          <C>              <C>
 
                                                                                                
Revenues............................................  $171,034,000  $76,783,000                   $247,817,000
                                                      ------------  -----------                   ------------
 
Operating profit....................................  $ 46,211,000  $ 3,111,000    $(13,235,000)  $ 36,087,000
                                                      ------------  -----------    ------------
 
Gain on sale of investments available
   for sale.........................................                                              $  1,097,000
Interest income.....................................                                              $    808,000
Interest expense....................................                                              $    (48,000)
                                                                                                  ------------
 
Income from continuing operations
   before income taxes..............................                                              $ 37,944,000
                                                                                                  ------------
 
Depreciation and amortization.......................  $  7,509,000  $ 2,328,000    $    202,000   $ 10,039,000
                                                      ------------  -----------    ------------   ------------
 
Capital expenditures................................  $ 23,061,000  $ 5,979,000    $  4,020,000   $ 33,060,000
                                                      ------------  -----------    ------------   ------------
 
Total identifiable assets at
   December 31, 1996................................  $ 66,595,000  $62,135,000    $ 12,311,000   $141,041,000
                                                      ------------  -----------    ------------   ------------
- --------------------------------------------------------------------------------------------------------------
</TABLE>


<TABLE>
<CAPTION>
                                                       Investment
                                                       Technology      Asset       General and
1995                                                  and Services  Management   Administrative   Consolidated
- --------------------------------------------------------------------------------------------------------------
 
 
<S>                                                   <C>           <C>          <C>              <C>
Revenues............................................  $157,960,000  $68,004,000                   $225,964,000
                                                      ------------  -----------                   ------------
 
Operating profit....................................  $ 45,176,000  $ 6,530,000    $(16,963,000)  $ 34,743,000
                                                      ------------  -----------    ------------
 
Interest income.....................................                                              $  1,019,000
Interest expense....................................                                              $   (255,000)
                                                                                                  ------------
 
Income from continuing operations
   before income taxes..............................                                              $ 35,507,000
                                                                                                  ------------
 
Depreciation and amortization.......................  $  8,997,000  $ 2,253,000    $    324,000   $ 11,574,000
                                                      ------------  -----------    ------------   ------------
 
Capital expenditures................................  $  3,931,000  $ 1,114,000    $  3,566,000   $  8,611,000
                                                      ------------  -----------    ------------   ------------
 
Total identifiable assets at
   December 31, 1995................................  $ 44,847,000  $43,170,000    $  7,284,000   $ 95,301,000
                                                      ------------  -----------    ------------   ------------
- --------------------------------------------------------------------------------------------------------------
</TABLE>

                                      45
<PAGE>
 
NOTE 13 - RELATED PARTY TRANSACTIONS:

     SIMC, either by itself or through two of its wholly owned subsidiaries, is
     a party to Investment Advisory and Administration Agreements with several
     regulated investment companies ("RICs"), which are administered by the
     Company.  Shares of the RICs are offered to clients of the Company and its
     subsidiaries.  Under the Investment Advisory and Administration Agreements,
     SIMC receives a fee for providing investment advisory, administrative, and
     accounting services to the RICs.  The investment advisory and
     administration fee is a fixed percentage of the average daily net asset
     value of each RIC, subject to certain limitations.  Investment advisory and
     administration fees received by the Company totaled $119,606,000,
     $92,143,000, and $73,807,000 in 1997, 1996, and 1995, respectively.  SIDCO
     is a party to Distribution Agreements with several RICs, which are advised
     and/or administered by SIMC.  SIDCO receives a fee from the RICs for
     providing distribution services pursuant to the provisions of various Rule
     12b-1 Plans adopted by the RICs.  These distribution fees totaled
     $7,269,000, $4,026,000, and $5,897,000 in 1997, 1996, and 1995,
     respectively.


NOTE 14 - QUARTERLY FINANCIAL DATA (UNAUDITED):

<TABLE>
<CAPTION>
                                                                   For the Three Months Ended
                                                     ----------------------------------------------------
1997                                                    March 31      June 30     Sept. 30      Dec. 31
- ---------------------------------------------------------------------------------------------------------
 
<S>                                                    <C>          <C>          <C>          <C>
Revenues.............................................  $63,504,000  $70,730,000  $74,283,000  $84,232,000
Income before income taxes...........................  $ 8,001,000  $ 8,568,000  $11,105,000  $16,333,000
Net income...........................................  $ 4,801,000  $ 5,141,000  $ 6,939,000  $ 9,963,000
 
Basic earnings per common share......................         $.26         $.28         $.38         $.55
 
Diluted earnings per common share....................         $.25         $.27         $.36         $.52
- ---------------------------------------------------------------------------------------------------------
 
</TABLE>


<TABLE>
<CAPTION>
                                                                      For the Three Months Ended
                                                     ---------------------------------------------------------
1996                                                    March 31      June 30     Sept. 30         Dec. 31
- --------------------------------------------------------------------------------------------------------------
 
<S>                                                    <C>          <C>          <C>          <C>
Revenues.............................................  $63,239,000  $61,541,000  $60,165,000       $62,872,000
Income from continuing operations
   before income taxes...............................  $ 9,818,000  $ 7,992,000  $ 9,390,000       $10,744,000
Income from continuing operations....................  $ 5,793,000  $ 4,893,000  $ 5,906,000       $ 6,554,000
Net income (loss)....................................  $ 5,793,000  $ 4,893,000  $ 5,906,000       $(9,781,000) (a)
Basic earnings per common share
   from continuing operations........................         $.31         $.26         $.32             $ .36
Basic earnings (loss) per common
   share.............................................         $.31         $.26         $.32             $(.53) (a)
Diluted earnings per common share
   from continuing operations........................         $.30         $.25         $.31             $ .34
Diluted earnings (loss) per common
   share.............................................         $.30         $.25         $.31             $(.51) (a)
- --------------------------------------------------------------------------------------------------------------
 
</TABLE>
     (a)  Includes the loss from the disposal of discontinued operations of
     $16,335,000 or $.89 basic earnings per common share and $.85 diluted
     earnings per common share (See Note 2).

                                      46
<PAGE>
 
                    SEI INVESTMENTS COMPANY AND SUBSIDIARIES
                    ----------------------------------------
                SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS
                -----------------------------------------------
       FOR EACH OF THE THREE YEARS IN THE PERIOD ENDED DECEMBER 31, 1997
       -----------------------------------------------------------------
<TABLE>
<CAPTION>
 
                                                                Additions
                                                           --------------------
                                               Balance at  Charged to  Charged                  Balance
                                               Beginning   Costs and   to Other                  at End
                 Description                    of Year     Expenses   Accounts  (Deductions)   of Year
- ---------------------------------------------------------------------------------------------------------
 
 
For the Year Ended December 31, 1995:
 
<S>                                            <C>         <C>         <C>       <C>           <C>
    Allowance for doubtful accounts            $1,206,000    $     --  $     --    $      --   $1,206,000
                                               ==========    ========  ========    =========   ==========
 
For the Year Ended December 31, 1996:
 
    Allowance for doubtful accounts            $1,206,000    $144,000  $     --    $      --   $1,350,000
                                               ==========    ========  ========    =========   ==========
 
For the Year Ended December 31, 1997:
 
    Allowance for doubtful accounts            $1,350,000    $     --  $     --    $(150,000)  $1,200,000
                                               ==========    ========  ========    =========   ==========
</TABLE>

                                      47
<PAGE>
 
ITEM 9.  CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND
         ---------------------------------------------------------------
FINANCIAL DISCLOSURE.
- -------------------- 

None.


                                      48

<PAGE>
 
                                    PART III
                                    --------
                                        

ITEM 10.  DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT.
          -------------------------------------------------- 

The information required by this item concerning directors is hereby
incorporated by reference to the Company's definitive proxy statement for its
1998 Annual Meeting of Shareholders to be filed with the Securities and Exchange
Commission within 120 days after December 31, 1997 pursuant to Regulation 14A
under the Securities Exchange Act of 1934, as amended (the "1998 Proxy
Statement").

The executive officers of the Company are as follows:

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.  Mr. West
was President from June 1979 to August 1990.

HENRY H. GREER, 60, has been Chief Financial Officer since September 1996.  Mr.
Greer has been President and Chief Operating Officer since August 1990, and was
an Executive Vice President from July 1990 to August 1990.  Mr. Greer has been a
Director since November 1979.

CARMEN V. ROMEO, 54, has been an Executive Vice President since December 1985.
Mr. Romeo has been a Director since June 1979.  Mr. Romeo was Treasurer and
Chief Financial Officer from June 1979 to September 1996.

RICHARD B. LIEB, 50, has been an Executive Vice President since October 1990,
and a Director since May 1995.

CARL A. GUARINO, 40, has been a Senior Vice President since April 1988, and was
General Counsel from April 1988 to January 1994.

EDWARD D. LOUGHLIN, 47, has been an Executive Vice President since January 1994
and a Senior Vice President since January 1988.

DENNIS J. MCGONIGLE, 37, has been an Executive Vice President since July 1996.
Mr. McGonigle has been a Senior Vice President since January 1994 and a Vice
President since January 1991.

KEVIN P. ROBINS, 36, has been a Senior Vice President and General Counsel since
January 1994 and a Vice President since January 1992.

                                      49
<PAGE>
 
ITEM 11.  EXECUTIVE COMPENSATION.
          ---------------------- 

The information called for in this item is hereby incorporated by reference to
the 1998 Proxy Statement.

ITEM 12.  SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT.
          -------------------------------------------------------------- 

The information called for in this item is hereby incorporated by reference to
the 1998 Proxy Statement.

ITEM 13.  CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS.
          ---------------------------------------------- 

The information called for in this item is hereby incorporated by reference to
the 1998 Proxy Statement.

                                      50
<PAGE>
 
                                    PART IV
                                    -------
                                        

ITEM 14.  EXHIBITS, FINANCIAL STATEMENT SCHEDULES, AND REPORTS ON FORM 8-K.
          ---------------------------------------------------------------- 

(a)  1 and 2.  Financial Statements and Financial Statement Schedules.  The
               ------------------------------------------------------      
               following is a list of the Consolidated Financial Statements of
               the Company and its subsidiaries and supplementary data filed as
               part of Item 8 hereof:

               Report of Independent Public Accountants
               Consolidated Balance Sheets -- December 31, 1997 and 1996
               Consolidated Statements of Operations -- For the years ended
               December 31, 1997, 1996, and 1995
               Consolidated Statements of Shareholders' Equity -- For the years
               ended December 31, 1997, 1996, and 1995 
               Consolidated Statements of Cash Flows -- For the years ended
               December 31, 1997, 1996, and 1995
               Notes to Consolidated Financial Statements
               Schedule II -- Valuation and Qualifying Accounts

               All other schedules are omitted because they are not applicable,
               or not required, or because the required information is included
               in the Consolidated Financial Statements or notes thereto.

           3.  Exhibits, Including Those Incorporated by Reference. The exhibits
               ---------------------------------------------------
               to this Report are listed on the accompanying index to exhibits
               and are incorporated herein by reference or are filed as part of
               this annual report on Form 10-K.

(b)            Reports on Form 8-K.  No reports on Form 8-K were filed by the
               -------------------    
               Company during the quarter ended December 31, 1997.

                                      51
<PAGE>
 
                                   SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange
Act of 1934, the Registrant has duly caused this report to be signed on its
behalf by the undersigned, thereunto duly authorized.

                                        SEI INVESTMENTS COMPANY
 
Date    March 27, 1998                  By  /s/ Henry H. Greer
     -------------------                    --------------------------
                                            Henry H. Greer
                                            President, Chief Operating
                                            Officer, Chief Financial 
                                            Officer and Director


Pursuant to the requirements of the Securities Exchange Act of 1934, this report
has been signed below by the following persons on behalf of the Registrant and
in the capacities and on dates indicated.

 
Date    March 27, 1998                   By  /s/ Alfred P. West, Jr.
     -------------------                     ----------------------------
                                             Alfred P. West, Jr.
                                             Chairman of the Board,
                                             Chief Executive Officer,
                                             and Director

Date    March 27, 1998                   By  /s/ Carmen V. Romeo
     -------------------                     ----------------------------
                                             Carmen V. Romeo
                                             Executive Vice President and
                                             Director

Date    March 27, 1998                   By  /s/ Richard B. Lieb
     -------------------                     ----------------------------
                                             Richard B. Lieb
                                             Executive Vice President and
                                             Director

Date    March 27, 1998                   By  /s/ William M. Doran
     -------------------                     ----------------------------
                                             William M. Doran
                                             Director


Date    March 27, 1998                   By  /s/ Henry H. Porter, Jr.
     -------------------                     ----------------------------
                                             Henry H. Porter, Jr.
                                             Director

                                      52
<PAGE>
 
                                 EXHIBIT INDEX
                                 -------------
                                        
The following is a list of exhibits filed as part of this annual report on Form
10-K.  For exhibits incorporated by reference, the location of the exhibit in
the previous filing is indicated in parentheses.

   3.1       Articles of Incorporation of the Registrant as amended on January
             21, 1983. (Incorporated by reference to exhibit 3.1 to the
             Registrant's Annual Report on Form 10-K for the fiscal year ended
             December 31, 1982.)
   3.1.1     Designation of Series A Junior Participating Preferred Shares,
             dated December 19, 1988. (Incorporated by reference to exhibit
             3.1.1 to the Registrant's Annual Report on Form 10-K for the fiscal
             year ended December 31, 1988.)
   3.1.2     Amendment to Articles of Incorporation of the Registrant, dated May
             21, 1992. (Incorporated by reference to exhibit 3.1.2 to the
             Registrant's Annual Report on Form 10-K for the fiscal year ended
             December 31, 1992.)
   3.1.3     Amendment to Articles of Incorporation of the Registrant, dated May
             26, 1994. (Incorporated by reference to exhibit 3.1.3 to the
             Registrant's Annual Report on Form 10-K for the fiscal year ended
             December 31, 1994.)
   3.1.4     Amendment to Articles of Incorporation of the Registrant, dated
             November 21, 1996. (Incorporated by reference to exhibit 3.1.4 to
             the Registrant's Annual Report on Form 10-K for the fiscal year
             ended December 31, 1996.)
   3.2       By-Laws. (Incorporated by reference to exhibit 3.2 to the
             Registrant's Annual Report on Form 10-K for the fiscal year ended
             December 31, 1983.)
   3.2.1     Amendment to By-Laws, dated December 19, 1988. (Incorporated by
             reference to exhibit 3.2.1 to the Registrant's Annual Report on
             Form 10-K for the fiscal year ended December 31, 1988.)
   3.2.2     Amendment to By-Laws, dated July 12, 1990. (Incorporated by
             reference to exhibit 3.2.2 to the Registrant's Quarterly Report on
             Form 10-Q for the quarter ended June 30, 1990.)
   4.1       Form of Certificate for Shares of Common Stock. (Incorporated by
             reference to exhibit 4.1 to the Registrant's Annual Report on Form
             10-K for the fiscal year ended December 31, 1988.)
   4.1.1     Form of Rights Certificate. (Incorporated by reference to exhibit B
             to exhibit 1 to the Registrant's Report on Form 8-K filed on
             January 12, 1989.)

             Note: Exhibits 10.1 through 10.10 constitute the management
             contracts and executive compensatory plans or arrangements in which
             certain of the directors and executive officers of the Registrant
             participate.

  10.1*      Stock Option Plan, Amended, Restated and Renewed as of February 11,
             1997. (Page 56)
  10.1.1*    1997 Stock Option Plan. (Page 67)
  10.1.2*    1997 Option Share Deferral Plan. (Page 77)
  10.2       Employee Stock Ownership Plan. (Incorporated by reference to
             exhibit 10.3 (b) to the Registrant's Annual Report on Form 10-K for
             the fiscal year ended December 31, 1985.)
  10.3       Employee Stock Purchase Plan, Amended and Restated as of May 8,
             1991. (Incorporated by reference to exhibit 10.3 to the
             Registrant's Annual Report on Form 10-K for the fiscal year ended
             December 31, 1991.)
  10.3.1*    Resolutions amending the Stocks Purchase Plan, effective as of
             October 15, 1997. (Page 88)
  10.4       SEI Capital Accumulation Plan. (Incorporated by reference to
             exhibit 99(e) to the Registrant's Registration Statement on Form S-
             8 (No. 333-41343) filed December 2, 1997.)
  10.5       Stock Option Plan for Non-Employee Directors. (Incorporated by
             reference to exhibit 10.12 to the Registrant's Annual Report on
             Form 10-K for the fiscal year ended December 31, 1988.)
10.5.1*      Amendment 1997-1 to Stock Option Plan for Non-Employee Directors. 
             (Page 89)
10.5.2*      1997 Option Share Deferral Plan for Non-Employee Directors.
             (Page 90)
  10.6       Employment Agreement, dated May 25, 1979, between Alfred P. West,
             Jr. and the Registrant. (Incorporated by reference to exhibit 10.7
             to the Registrant's Annual Report on Form 10-K for the fiscal year
             ended December 31, 1990.)
  10.7       Employment Agreement, dated January 21, 1987, between Gilbert L.
             Beebower and the Registrant. (Incorporated by reference to exhibit
             10.8 to the Registrant's Annual Report on Form 10-K for the fiscal
             year ended December 31, 1990.)

                                      53
<PAGE>
 
  10.8.1     Employment Agreement, dated July 1, 1987, between Richard B. Lieb
             and the Registrant. (Incorporated by reference to exhibit 10.9 to
             the Registrant's Annual Report on Form 10-K for the fiscal year
             ended December 31, 1990.)
  10.8.2     Stock Option Agreement, dated February 23, 1989, between Richard B.
             Lieb and a subsidiary of the Registrant, as amended. (Incorporated
             by reference to exhibit 10.8.2 to the Registrant's Annual Report on
             Form 10-K for the fiscal year ended December 31, 1992.)
  10.9       Summary of Company Bonus Plan for Senior Management. (Incorporated
             by reference to exhibit 10.9 to the Registrant's Annual Report on
             Form 10-K for the fiscal year ended December 31, 1993.)
  10.10      Employment Agreement, dated February 28, 1992, between Charles A.
             Marsh and the Registrant. (Incorporated by reference to exhibit
             10.10 to the Registrant's Annual Report on Form 10-K for the fiscal
             year ended December 31, 1993.)
  10.11      Directors and Officers Liability Insurance Policy. (Incorporated by
             reference to exhibit 10.9 to the Registrant's Registration
             Statement on Form S-8 (No.2-78133) filed June 25, 1982.)
  10.12      Lease Agreement, dated as of January 1, 1990, between The Canada
             Life Assurance Company and the Registrant. (Incorporated by
             reference to exhibit 10.11 to the Registrant's Annual Report on
             Form 10-K for the fiscal year ended December 31, 1990.)
  10.13      Lease Agreement, dated as of May 1, 1991, between Two North
             Riverside Plaza Joint Venture and the Registrant. (Incorporated by
             reference to exhibit 10.11 to the Registrant's Annual Report on
             Form 10-K for the fiscal year ended December 31, 1991.)
  10.14      Credit Agreement, dated May 31, 1992, between Provident National
             Bank and the Registrant, as amended. (Incorporated by reference to
             exhibit 10.12 to the Registrant's Annual Report on Form 10-K for
             the fiscal year ended December 31, 1992.)
  10.14.1    Second Modification Agreement to the Credit Agreement, dated April
             19, 1993, between PNC Bank, National Association, successor by
             merger to Provident National Bank, and the Registrant.
             (Incorporated by reference to exhibit 10.14.1 to the Registrant's
             Annual Report on Form 10-K for the fiscal year ended December 31,
             1993.)
  10.14.2    Third Modification Agreement to the Credit Agreement, dated May 31,
             1993, between PNC Bank, National Association, successor by merger
             to Provident National Bank, and the Registrant. (Incorporated by
             reference to exhibit 10.14.2 to the Registrant's Annual Report on
             Form 10-K for the fiscal year ended December 31, 1993.)
  10.14.3    Fourth Modification Agreement to the Credit Agreement, dated March
             14, 1994, between PNC Bank, National Association, successor by
             merger to Provident National Bank, and the Registrant.
             (Incorporated by reference to exhibit 10.14.3 to the Registrant's
             Annual Report on Form 10-K for the fiscal year ended December 31,
             1994.)
  10.14.4    Fifth Modification Agreement to the Credit Agreement, dated May 31,
             1994, between PNC Bank, National Association, successor by merger
             to Provident National Bank, and the Registrant. (Incorporated by
             reference to exhibit 10.14.4 to the Registrant's Annual Report on
             Form 10-K for the fiscal year ended December 31, 1994.)
  10.14.5    Sixth Modification Agreement to the Credit Agreement, dated May 5,
             1995, between PNC Bank, National Association, successor by merger
             to Provident National Bank, and the Registrant. (Incorporated by
             reference to exhibit 10.14.5 to the Registrant's Annual Report on
             Form 10-K for the fiscal year ended December 31, 1995.)
  10.14.6    Seventh Modification Agreement to the Credit Agreement, dated June
             15, 1995, between PNC Bank, National Association, successor by
             merger to Provident National Bank, and the Registrant.
             (Incorporated by reference to exhibit 10.14.6 to the Registrant's
             Annual Report on Form 10-K for the fiscal year ended December 31,
             1995.)
  10.14.7    Eighth Modification Agreement to the Credit Agreement, dated
             October 19, 1995, between PNC Bank, National Association, successor
             by merger to Provident National Bank, and the Registrant.
             (Incorporated by reference to exhibit 10.14.7 to the Registrant's
             Annual Report on Form 10-K for the fiscal year ended December 31,
             1995.)
  10.14.8    Ninth Modification Agreement to the Credit Agreement, dated March
             31, 1996, between PNC Bank, National Association, successor by
             merger to Provident National Bank, and the Registrant.
             (Incorporated by reference to exhibit 10.14.8 to the Registrant's
             Annual Report on Form 10-K for the fiscal year ended December 31,
             1996.)

                                      54
<PAGE>
 
  10.14.9    Tenth Modification Agreement to the Credit Agreement, dated May 31,
             1996, between PNC Bank, National Association, successor by merger
             to Provident National Bank, and the Registrant. (Incorporated by
             reference to exhibit 10.14.9 to the Registrant's Annual Report on
             Form 10-K for the fiscal year ended December 31, 1996.)
  10.14.10   Eleventh Modification Agreement to the Credit Agreement, dated
             October 1, 1996, between PNC Bank, National Association, successor
             by merger to Provident National Bank, and the Registrant.
             (Incorporated by reference to exhibit 10.14.10 to the Registrant's
             Annual Report on Form 10-K for the fiscal year ended December 31,
             1996.)
  10.14.11   Release and Modification Agreement to the Credit Agreement, dated
             February 20, 1997, between PNC Bank, National Association,
             successor by merger to Provident National Bank, and the Registrant.
             (Incorporated by reference to exhibit 10.14.11 to the Registrant's
             Annual Report on Form 10-K for the fiscal year ended December 31,
             1996.)
  10.14.12*  Thirteenth Modification Agreement to the Credit Agreement, dated
             May 30, 1997, between PNC Bank, National Association, successor by
             merger to Provident National Bank, and the Registrant. (Page 101)
  10.14.13*  Fourteenth Modification Agreement to the Credit Agreement, dated
             December 31, 1997, between PNC Bank, National Association,
             successor by merger to Provident National Bank, and the Registrant.
             (Page 103)
  10.15      Pledge Agreement, dated May 31, 1992, between Provident National
             Bank and the Registrant. (Incorporated by reference to exhibit
             10.13 to the Registrant's Annual Report on Form 10-K for the fiscal
             year ended December 31, 1992.)
  10.16      Master Lease Agreement, dated December 29, 1989, between Varilease
             Corporation and the Registrant, as amended. (Incorporated by
             reference to exhibit 10.14 to the Registrant's Annual Report on
             Form 10-K for the fiscal year ended December 31, 1992.)
  10.17      Note Purchase Agreement, dated as of February 24, 1997, with
             respect to the issuance by the Registrant of $20,000,000 7.20%
             Senior Notes, Series A, due February 24, 2007, and $15,000,000
             7.27% Senior Notes, Series B, due February 24, 2012. (Incorporated
             by reference to exhibit 10.17 to the Registrant's Annual Report on
             Form 10-K for the fiscal year ended December 31, 1996.)
  21*        Subsidiaries of the Registrant.  (Page 105)
  23*        Consent of Independent Public Accountants.  (Page 106)
  27*        Financial Data Schedule for the Year ended December 31, 1997.
  27.1*      Restated Financial Data Schedule for the Year ended December 31,
             1996.
  27.2*      Restated Financial Data Schedule for the Year ended December 31,
             1995.
  27.3*      Restated Financial Data Schedule for the Three Months ended March
             31, 1997. 
  27.4*      Restated Financial Data Schedule for the Six Months ended June 30,
             1997. 
  27.5*      Restated Financial Data Schedule for the Nine Months ended
             September 30, 1997. 
  27.6*      Restated Financial Data Schedule for the Three Months ended March
             31, 1996.
  27.7*      Restated Financial Data Schedule for the Six Months ended June 30,
             1996. 
  27.8*      Restated Financial Data Schedule for the Nine Months ended
             September 30, 1996.
  99*        Miscellaneous exhibits. (Page 116)

* Filed herewith as an exhibit to this Form 10-K.

                                      55

<PAGE>
 
 
                                                                   EXHIBIT 10.1
 
                                                  AMENDED, RESTATED AND RENEWED
                                                        AS OF FEBRUARY 11, 1997
 
                            SEI INVESTMENTS COMPANY
                               STOCK OPTION PLAN
 
1. Background.
 
   The Board of Directors of SEI Investments Company (formerly known as SEI
Corporation), a Pennsylvania corporation (the "Company"), by resolution dated
January 21, 1981, adopted the Stock Option Plan (the "Plan") providing for the
grant of stock options for the purchase of shares of Non-Voting Common Stock
of the Company, which shares were subsequently converted to Common Stock, par
value $.01 (the "Shares"), to employees of the Company and its subsidiaries.
The Plan was initially approved by the shareholders of the Company on February
9, 1981. The Plan has been subsequently amended and restated from time to time
by all requisite action of the Board of Directors and shareholders of the
Company. The Plan was again amended and restated by action of the Board of
Directors on February 11, 1997, subject to approval by shareholders of the
Company.
 
2. Purpose of Plan.
 
   The purpose of the Plan is to allow for the issuance thereunder of
Incentive Stock Options and Non-Qualified Options in order to provide an
additional means through which the Company can attract and retain employees
and consultants. The Company believes that the Plan will encourage the
participants to contribute materially to the growth of the Company, thereby
benefitting the Company's shareholders, and will align the economic interests
of the participants with those of the shareholders.
 
3. Administration of the Plan.
 
   (a) Committee. The Plan shall be administered and interpreted by a Stock
Option Committee (the "Committee"). The Committee shall consist of two or more
persons appointed by the Board of Directors, all of whom shall be "outside
directors" as defined under section 162(m) of the Internal Revenue Code of
1986, as amended (the "Code") and related Treasury regulations and "non-
employee directors" as defined under Rule 16b-3 under the Securities Exchange
Act of 1934, as amended (the "Exchange Act").
 
                                      56

<PAGE>
 
 
   (b) Committee Authority. The Committee shall have the sole authority to (i)
determine the individuals to whom grants shall be made under the Plan, (ii)
determine the type, size and terms of the grants to be made to each such
individual, (iii) determine the time when the grants will be made and the
duration of any applicable exercise period, including the criteria for
exercisability and the acceleration of exercisability and (iv) deal with any
other matters arising under the Plan.
 
   (c) Committee Determinations. The Committee shall have full power and
authority to administer and interpret the Plan, to make factual determinations
and to adopt or amend such rules, regulations, agreements and instruments for
implementing the Plan and for the conduct of its business as it deems necessary
or advisable, in its sole discretion. The Committee's interpretations of the
Plan and all determinations made by the Committee pursuant to the powers vested
in it hereunder shall be conclusive and binding on all persons having any
interest in the Plan or in any awards granted hereunder. All powers of the
Committee shall be executed in its sole discretion, in the best interest of the
Company, not as a fiduciary, and in keeping with the objectives of the Plan and
need not be uniform as to similarly situated individuals.
 
4. Shares Subject to the Plan.
 
   (a) Plan Share Limits. The maximum aggregate number of Shares with respect
to which options may be granted from time to time under the Plan (subject to
the provisions of Section 12) shall be 12,304,988 Shares. The maximum aggregate
number of Shares that shall be subject to grants made under the Plan to any
individual during any calendar year shall be 25,000 Shares.
 
   (b) Other Share Requirements. If an option granted under the Plan ceases to
be exercisable in whole or in part by reason of (i) the expiration of the term
of the option; (ii) the cancellation of the option with the consent of the
optionee; (iii) upon or following termination of employment of the optionee in
accordance with Section 10; or (iv) the forfeiture, exchange or surrender of
the option, the Shares which were subject to such option, but to which the
option had not been exercised at the time of termination of the option, shall
continue to be available under the Plan. The Shares to be issued upon exercise
of options granted under the Plan shall be either authorized but unissued
Shares or Shares reacquired by the Company and held in the treasury of the
Company, including Shares purchased by the Company on the open market for
purposes of the Plan.
 
 
                                      57

<PAGE>
 
 
5. Designation of Participants
 
   (a) Eligible Individuals. Employees of the Company, and affiliates of the
Company, shall be eligible to receive options under the Plan. Consultants who
perform services to the Company or any of its affiliates shall be eligible to
participate in the Plan if the consultants render bona fide services and such
services are not in connection with the offer or sale of securities in a
capital-raising transaction. Notwithstanding the foregoing, only employees of
the Company or its subsidiaries shall be eligible to receive Incentive Stock
Options.
 
   (b) Selection of Optionees. From time to time, the Committee shall designate
from such eligible persons those who will receive options and the number of
Shares to be covered by each option.
 
   (c) Rights of Participants. Nothing in the Plan shall entitle any employee,
consultant or other person to any claim or right to be granted an option under
this Plan. Nothing in this Plan, in any option granted pursuant to this Plan,
or in any action taken hereunder shall be construed as conferring on any
individual any rights to continue in the employ (or as a consultant) of the
Company or any of its subsidiaries, or any other employment (or consulting)
rights. Nothing in the Plan or in any option granted pursuant to this Plan
shall in any way interfere with the right of the Company or any of its
subsidiaries to terminate the optionee's employment (or consulting
relationship) at any time. Options may be granted to eligible persons whether
or not they hold or have held options under the Plan or under plans or
arrangements previously adopted by the Company.
 
   (d) Definitions. For the purposes of the Plan, the term "subsidiary" shall
mean any corporation now existing or hereafter organized or acquired by the
Company in an unbroken chain of corporations beginning with the Company if, at
the time of the granting of the option, each of the corporations (including the
Company) other than the last corporation in the unbroken chain owns stock
possessing fifty percent (50%) or more of the total combined voting power of
all classes of stock in one or the other corporations, in such chain. The term
"affiliate" shall mean any corporation, partnership or other entity in which
the Company holds, directly or indirectly, fifty percent (50%) or more of the
entity's equity interest.
 
6. Types of Options.
 
   Options granted under the Plan may be of two types: (a) options intended to
meet the requirements of section 422 of the Code ("Incentive Stock Options")
and (b) options not intended to meet the requirements of section 422 of the
Code ("Non-Qualified Options"). The Committee shall have authority and
discretion to grant to an eligible person either Incentive Stock Options, Non-
Qualified Options or both but shall clearly designate the nature of each option
at the time of option grant.
 
                                      58

<PAGE>
 
7. Stock Option Agreement.
 
   Each option granted under the Plan shall be subject to the terms and
conditions set forth herein and shall be evidenced by a stock option agreement,
which shall be executed by the Company. The agreement shall contain such terms
and provisions, not inconsistent with the Plan, as shall be determined by the
Committee, including (a) a clear designation of the status of the options
granted thereby; and (b) in the case of Incentive Stock Options such terms as
shall be requisite to cause such options to comply with the provisions of
section 422 of the Code. The Committee shall approve the form and provisions of
each stock option agreement, and any amendment thereto. Incentive Stock Options
and Non-Qualified Options may be granted simultaneously and subject to a single
option agreement, provided that, in no event shall a Non- Qualified Option be
granted in tandem with an Incentive Stock Option, such that the exercise of one
affects the right to exercise the other. The terms and provisions of such
option agreements may vary between optionees and between different options
granted to the same optionee. By accepting any option granted under the Plan,
an optionee will be deemed to have agreed to all provisions contained in the
option agreement.
 
8. Option Price.
 
   (a) Determination of Option Price. The option price shall be determined by
the Committee and shall be not less than the Fair Market Value (as defined
below) of the Shares at the time the option is granted provided; however, that
the option price of Shares with respect to Incentive Stock Options granted to
any person possessing (at the time of option grant) over ten percent of the
total combined voting power of all classes of stock of the Company and any
parent and subsidiary corporations (such person hereinafter a "control person")
shall be 110% of such Fair Market Value of a Share on the date the Incentive
Stock Option is granted.
 
   (b) Determination of Fair Market Value. For the purposes of this Plan, the
Fair Market Value of the Shares shall mean the average (mean) of the closing
bid and asked prices of the Shares as reported on the relevant date through the
National Association of Securities Dealers Automated Quotation System or, if
the Shares are listed or admitted to trading on the Nasdaq National Market
System or any national securities exchange or if the last reported sale price
of such Shares is generally available, the last reported sale price on such
system or exchange on the relevant date. The Fair Market Value for any day for
which there is no such bid and asked price or last reported sales price shall
be the Fair Market Value of the next preceding day for which there is such a
price.
 
                                      59

<PAGE>
 
 
   Should the Shares be traded otherwise than on the markets referred to above,
then the Fair Market Value shall be determined by the Committee. If the Shares
are not publicly traded, then the Fair Market Value shall be not less than the
value established for the Shares by an independent appraisal as of a date not
more than twelve months before such value determination by the Committee.
 
9.Amount of Incentive Stock Options.
 
   With respect to Incentive Stock Options granted after December 31, 1986, if
the aggregate Fair Market Value (determined as of the time of option grant) of
the Shares with respect to which such Incentive Stock Options first become
exercisable during any calendar year under this Plan and any other plan of the
Company or any parent or subsidiary, exceeds $100,000, then such Incentive
Stock Options, to the extent of such excess, shall be treated for all tax
purposes as Non-Qualified Options.
 
10. Terms of Options.
 
   The Committee shall have the authority to determine the term of each option,
provided that no Incentive Stock Option granted to a control person shall be
exercisable after the expiration of five (5) years from the date of option
grant and no other option shall be exercisable after the expiration of ten (10)
years from the date of option grant. Subject to the limitation periods
hereinabove set forth, no option, or portion thereof, granted under the Plan
shall vest after the optionee ceases to be employed by (and is employed by
neither) the Company or one of its subsidiaries or affiliates (a "termination
of employment") and all options shall terminate automatically on the earliest
to occur of the expiration of the option term (as described above), or one of
the following events:
 
   a. Upon the expiration of ten (10) days after notice by the Company pursuant
to Section 12(d) of the sale of all or substantially all of its assets;
 
   b. Thirty (30) days after a termination of employment (or within such other
period of time as may be specified by the Committee) for any reason other than
death, retirement or disability;
 
   c. One year from the date of a termination of employment (or within such
other period of time as may be specified by the Committee) by reason of the
optionee's death;
 
   d. Three months from the date of a termination of employment (or within such
other period of time as may be specified by the Committee) by reason of the
optionee's disability or retirement; or
 
                                      60

<PAGE>
 
 
   e. As of the date of a termination of employment by reason of a termination
for cause.
 
   For purpose of determining whether or not a termination of employment has
occurred, (i) the transfer of an optionee among the Company or any subsidiary
or affiliate shall not be deemed a termination of employment, (ii) the sale of
any subsidiary or affiliate to an unaffiliated party shall be deemed a
termination of employment of any optionee who continues to be employed by such
subsidiary or affiliate subsequent to such sale, (iii) a consultant shall be
deemed to have incurred a termination of employment at the time he is no
longer required to perform services for the Company or any subsidiary or
affiliate, as determined by the Committee, (iv) an optionee shall be deemed to
have been terminated for cause if the Committee finds that the optionee has
breached his employment or service contract with the Company, any subsidiary
or affiliate, or has been engaged in disloyalty to the Company, any subsidiary
or affiliate, including, without limitation, fraud, embezzlement, theft,
commission of a felony or proven dishonesty in the course of his employment or
service, or has disclosed trade secrets or confidential information of the
Company, any subsidiary or affiliate to persons not entitled to receive such
information, and (v) an optionee shall be deemed to be disabled if the
optionee becomes disabled within the meaning of section 22(e)(3) of the Code.
Notwithstanding the foregoing, with respect to an option granted to a
consultant, the Committee, in its sole discretion, shall establish the
provisions concerning termination of such option at the time of option grant.
In the absence of such establishment, the provisions of (a) through (e) above
shall apply.
 
11. Exercise of Options.
 
   (a) Exercisability of Options. The time or times at which or during which
options granted under this Plan may be exercised, and any conditions
pertaining to such exercise, shall be determined by the Committee and
specified in the stock option agreement or an amendment to the stock option
agreement; provided however, that no Incentive Stock Option granted on or
before December 31, 1986 shall become exercisable while the optionee has
outstanding any previously granted incentive stock option (as defined in
section 422 of the Code) to purchase stock in the Company, in a corporation
that (at the time of option grant) was a parent or subsidiary of the Company
or in a predecessor corporation of any of such corporations.
 
   (b) Transferability of Options.
 
     (i) Nontransferability of Options. Except as provided below, no option
  granted under this Plan shall be assignable or otherwise transferable
  except by will or the laws of descent and distribution or, with respect to
  Non-Qualified Options, if permitted in any specific case by the Committee,
  pursuant to a domestic relations order (as defined under the Code or Title
  I of the Employee Retirement Income Security Act of 1974, as amended, or
  the regulations thereunder). Any option shall be exercisable solely by
 
                                      61

<PAGE>
 
 
  the optionee during the lifetime of the optionee and, after the death of
  the optionee, an option shall be exercisable (subject to the provision of
  Section 10) solely by either the duly qualified personal representative or
  representatives of the optionee, or the person or persons who acquire the
  right to exercise such option by will or the laws of descent and
  distribution and such person or persons furnish proof satisfactory to the
  Company of his or their right to receive the option under the optionee's
  will or under the applicable laws of descent and distribution.
 
     (ii) Transfer of Non-Qualified Options. Notwithstanding the foregoing,
  the Committee may provide, in a stock option agreement, that an optionee
  may transfer Non-Qualified Options to family members or other persons or
  entities according to such terms as the Committee may determine; provided
  that the optionee receives no consideration for the transfer of a Non-
  Qualified Option and the transferred Option shall continue to be subject to
  the same terms and conditions as were applicable to the Option immediately
  before the transfer.
 
   (c) Payment of Option Price. The purchase price of the Shares as to which
an option is exercised shall be paid in full in cash or in any other manner
approved by the Committee which may include, but shall not be limited to,
payment by surrender of unrestricted Shares owned by the optionee (including
Shares acquired in connection with the exercise of the option, subject to such
restrictions as the Committee deems appropriate) and having a Fair Market
Value on the date of exercise equal to the purchase price, or payment through
a broker in accordance with procedures permitted by Regulation T of the
Federal Reserve Board. The optionee shall pay the option price and the amount
of any withholding tax due (pursuant to Subsection (d)) at the time of
exercise.
 
   (d) Withholding of Taxes.
 
     (i) Required Withholding. All options under the Plan shall be subject to
  applicable federal (including FICA), state and local tax withholding
  requirements. The Company may require the optionee or other person
  receiving such Shares to pay to the Company the amount of any such taxes
  that the Company is required to withhold with respect to the exercise of
  such options, or the Company may deduct from other wages paid by the
  Company the amount of any withholding taxes due with respect to such
  exercise.
 
     (ii) Withholding Shares. If the Company is required to withhold any
  taxes arising from an exercise of options under the Plan, the Treasurer of
  the Company may, in such person's discretion, withhold delivery of Shares
  issuable upon exercise of an option in an amount (valued at the Fair Market
  Value of such Shares on the date of exercise of the option) sufficient to
  cover the Company's withholding obligation with respect to such taxes.
 
                                      62

<PAGE>
 
 
   (e) Notice of Exercise. Notice in writing shall be given by the optionee to
the Treasurer of the Company, or such other person as may be designated from
time to time by the Treasurer, on any day on which the offices of the Company
are generally open for the conduct of business, which notice shall indicate the
exercise of any option and specify the number of Shares desired at the option
price.
 
   (f) Limitations on Issuance of Shares. The obligation of the Company to
deliver Shares upon such exercise shall be subject to all applicable laws,
rules, regulations, and such approvals by governmental agencies as may be
deemed appropriate by the Committee, including, among others, such steps as
counsel for the Company shall be deem necessary or appropriate to comply with
requirements of relevant securities laws. Such obligation shall also be subject
to the condition that the Shares reserved for issuance upon the exercise of
options granted under the Plan shall have been duly listed on any national
securities exchange which then constitutes the principal trading market for the
Shares.
 
12. Capital Change of the Company.
 
   (a) Adjustments. In the event that there is a change in, reclassification
of, subdivision of, combination of, split-up or spin-off with respect to, stock
dividend on, or exchange of stock of the Company for the outstanding Shares of
the Company, the maximum aggregate number and class of Shares as to which
options may be granted under the Plan, the maximum aggregate number of Shares
that any individual participating in the Plan may be granted in any calendar
year, and the number and class of Shares as to which each outstanding option
and the option price may (but need not) be adjusted by the Committee in any
manner in which the Committee, in is absolute discretion, deems appropriate.
Such adjustment to Shares subject to the Plan or to Shares subject to options
under the Plan shall not in any event take place with respect to any dividend
payable in Shares of the Company, unless such dividend would result in either
(i) an increase of ten percent (10%) or more in the outstanding Shares of the
Company since the adoption of the Plan or the grant of the subject option
thereunder, as the case may be; or (ii) an increase in any one transaction of
five percent (5%) or more in the outstanding Shares.
 
   (b) Consolidation or Merger of the Company. If the Company shall be
consolidated or merged with another corporation, each optionee who has an
outstanding option hereunder shall, at the time for issuance of Shares upon
exercise or partial exercise of such option, be entitled to receive the same
number and kind of shares, or the same amount of other property, cash, or
securities as the optionee would have been entitled to receive upon the
happening of such consolidation or merger if the optionee had been, immediately
prior to such event, the holder of the number of Shares to which the optionee
has an outstanding option hereunder (to the extent of such exercise or partial
exercise) adjusted in the manner provided in this Section, or, if another
 

                                      63
<PAGE>
 
 
corporation shall be the survivor, such other corporation shall substitute
therefor a substantially equivalent number and kind of shares of stock or other
property, cash, or securities of such other corporation. Notwithstanding
anything in the Plan to the contrary, in the event of a consolidation or merger
described above, the Committee shall not have the right to take any actions
described in the Plan that would make the consolidation or merger ineligible
for pooling of interests accounting treatment or that would make the
consolidation or merger ineligible for desired tax treatment if, in the absence
of such right, the consolidation or merger would qualify for such treatment and
the Company intends to use such treatment with respect to the consolidation or
merger.
 
   (c) Further Adjustments. In the event that there shall be any change, other
then as specified above, in the number or kind of the outstanding Shares or of
any stock or other securities into which such Shares shall have been changed or
for which they shall have been exchanged, or in the event of a dividend to
holders of the Shares payable other than in cash or stock of the Company, then
if the Committee shall determine that such change equitably requires an
adjustment in the number or kind of Shares theretofore appropriated for the
purposes of the Plan but not yet covered by an option, an adjustment in the
number or kind of Shares that may be granted to any individual during any
calendar year under the limit set forth in Section 4 of the Plan, or an
adjustment with respect to the number, price or kind of Shares then subject to
an option or options, such adjustment shall be made and shall be effective and
binding for all purposes of the Plan.
 
   (d) Sale of Substantially all Assets. Notwithstanding the above, if all or
substantially all of the assets of the Company shall be sold or exchanged
(otherwise than by merger or consolidation), each optionee shall have the right
to exercise such option in full, to the extent that it has not previously been
exercised within ten (10) days after the notice by the Company of the right to
exercise, and any such option not so exercised shall lapse.
 
13. Termination and Amendment.
 
   (a) Termination and Amendment of Plan. Unless the Plan shall theretofore
have been terminated as hereinafter provided, it shall terminate on, and no
option shall be granted thereunder after, January 1, 2001. The Board of
Directors may also terminate the Plan or make such modifications or amendments
thereof as it shall deem advisable; provided, however, that the Board of
Directors shall not, amend the Plan without further approval by the holders of
a majority of the outstanding common stock of the Company if such approval is
required by section 162(m) of the Code or such approval is required by section
422 of the Code.
 
   (b) Termination and Amendment of Outstanding Options. The Committee may
authorize amendments of outstanding options including without limitation the
reduction of the option prices specified therein (or the
 

                                      64

<PAGE>
 
 
granting of new options at lower prices upon the cancellation of outstanding
options), so long as all options granted hereunder outstanding at any one time
shall not call for issuance of more shares of common stock than those provided
in Section 4 hereof and so long as the provisions of any amended option would
have been permissible under the Plan if such option had been originally granted
as of the date of such amendment with such amended terms. No termination,
modification, or amendment of this Plan may adversely affect any then
outstanding option under such Plan without the consent of the person to whom
such option has been granted. Whether or not the Plan has terminated, an
outstanding option may be terminated or amended under Section 18(c) or may be
amended by agreement of the Company and the optionee consistent with the Plan.
 
   (c) Governing Document. The Plan shall be the controlling document. No other
statements, representations, explanatory materials or examples, oral or
written, may amend the Plan in any manner. The Plan shall be binding upon and
enforceable against the Company and its successors and assigns.
 
14. Funding of the Plan.
 
   This Plan shall be unfunded. The Company shall not be required to establish
any special or separate fund or to make any other segregation of assets to
assure the payment of grants under this Plan. In no event shall interest be
paid or accrued on any grant.
 
15. No Fractional Shares
 
   No fractional Shares shall be issued or delivered pursuant to the Plan or
any option. The Committee shall determine whether cash, other awards or other
property shall be issued or paid in lieu of such fractional shares or whether
such fractional shares or any rights thereto shall be forfeited or otherwise
eliminated.
 
16. Headings.
 
   Section headings are for reference only. In the event of a conflict between
a title and the content of a Section, the content of the Section shall control.
 
17. Effective Date.
 
   Subject to the approval of the Company's shareholders, the Plan, as amended
and restated, shall be effective on February 11, 1997.
 

                                      65

<PAGE>
 
 
18. Miscellaneous.
 
   (a) Grants in Connection with Corporate Transactions and Otherwise. Nothing
contained in this Plan shall be construed to (i) limit the right of the
Committee to make grants under this Plan in connection with the acquisition, by
purchase, lease, merger, consolidation or otherwise, of the business or assets
of any corporation, firm or association, including options to employees thereof
who become employees of the Company, or for other proper corporate purposes, or
(ii) limit the right of the Company to grant stock options or make other awards
outside of this Plan. Without limiting the foregoing, the Committee may make a
grant to an employee of another corporation who becomes an employee by reason
of a corporate merger, consolidation, acquisition of stock or property,
reorganization or liquidation involving the Company or any of its subsidiaries
in substitution for a stock option or restricted stock grant made by such
corporation. The terms and conditions of the substitute grants may vary from
the terms and conditions required by the Plan and from those of the substituted
stock incentives. The Committee shall prescribe the provisions of the
substitute grants.
 
   (b) Rights of an Optionee. No optionee shall have any rights of a
shareholder with respect to any Shares unless and until the optionee has
exercised the option with respect to such Shares and has paid the full option
price therefor.
 
   (c) Compliance with Law. The Plan and the exercise of options shall be
subject to all applicable laws and to approvals by any governmental or
regulatory agency as may be required. With respect to persons subject to
section 16 of the Exchange Act, it is the intent of the Company that the Plan
and all transactions under the Plan comply with all applicable provisions of
Rule 16b-3 or its successors under the Exchange Act. The Committee may revoke
any grant if it is contrary to law or modify a grant to bring it into
compliance with any valid and mandatory government regulation. The Committee
may also adopt rules regarding the withholding of taxes on payments to
optionees. The Committee may, in its sole discretion, agree to limit its
authority under this Section.
 
   (d) Governing Law. The validity, construction, interpretation and effect of
the Plan and stock option agreements issued under the Plan shall exclusively be
governed by and determined in accordance with the law of the Commonwealth of
Pennsylvania, to the extent such law is not superseded by or inconsistent with
Federal law.
 
 
                                      66


<PAGE>
 
                                                                  EXHIBIT 10.1.1

                           SEI INVESTMENTS COMPANY
                            1997 STOCK OPTION PLAN


1.  Background.


     The Board of Directors of SEI Investments Company, a Pennsylvania
corporation (the "Company"), by resolution dated December 4, 1997, adopted the
1997 Stock Option Plan (the "Plan") providing for the grant of stock options for
the purchase of shares of Common Stock, par value $.01 (the "Shares"), to
eligible employees of and consultants to the Company and its affiliates, and
directors of the Company who are not also employees of the Company or any
affiliate of the Company ("Non-Employee Directors").


2.  Purpose of Plan.


     The purpose of the Plan is to allow for the issuance thereunder of stock
options in order to provide an additional means through which the Company can
attract and retain employees and independent Non-Employee Directors.  The
Company believes that the Plan will encourage the participants to contribute
materially to the growth of the Company, thereby benefitting the Company's
shareholders, and will align the economic interests of the participants with
those of the shareholders.


3.  Administration of the Plan.


     (a) Committee.  The Plan shall be administered and interpreted by a Stock
Option Committee (the "Committee").  The Committee shall consist of two or more
persons appointed by the Board of Directors.

     (b) Committee Authority.  Subject to the further terms and conditions of
the Plan, the Committee shall have the sole authority to (i) determine the
individuals to whom grants shall be made under the Plan, (ii) determine the size
and terms of the grants to be made to each such individual, (iii) determine the
time when the grants will be made and the duration of any applicable exercise
period, including the criteria for exercisability and the acceleration of
exercisability and (iv) deal with any other matters arising under the Plan.

     (c) Committee Determinations.  The Committee shall have full power and
authority to administer and interpret the Plan, to make factual determinations
and to adopt or amend such rules, regulations, agreements and instruments for
implementing the Plan and for the conduct of its business as it deems necessary
or advisable, in its sole discretion.  The Committee's interpretations of the
Plan and all determinations made by the Committee pursuant to the powers vested
in it hereunder shall be conclusive and binding on all persons having any
interest in the Plan or in any awards granted hereunder.  All powers of the
Committee shall be executed in its sole discretion, in the best interest of the
Company, not as a fiduciary, and in keeping with the objectives of the Plan and
need not be uniform as to similarly situated individuals.


                                      67
<PAGE>
 
4.  Shares Subject to the Plan.


     (a) Plan Share Limits.  The maximum aggregate number of Shares that may be
issued under the Plan with respect to options granted from time to time under
the Plan (subject to the provisions of Section 12) shall be 400,000 Shares.  The
maximum aggregate number of Shares that may be issued with respect to options
granted made under the Plan to directors eligible hereunder shall be 25,000.

     (b) Other Share Requirements.  If an option granted under the Plan ceases
to be exercisable in whole or in part by reason of (i) the expiration of the
term of the option; (ii) the cancellation of the option with the consent of the
optionee; (iii) upon or following termination of employment of the optionee in
accordance with Section 9; or (iv) the forfeiture, exchange or surrender of the
option, the Shares which were subject to such option, but to which the option
had not been exercised at the time of termination of the option, shall continue
to be available under the Plan.  The Shares to be issued upon exercise of
options granted under the Plan shall be either authorized but unissued Shares or
Shares reacquired by the Company and held in the treasury of  the Company,
including Shares purchased by the Company on the open market for purposes of the
Plan.


5.  Designation of Participants


     (a) Eligible Individuals.  Employees of the Company and affiliates of the
Company, other than any employees who are officers or directors of the Company
or an affiliate of the Company, shall be eligible to receive options under the
Plan.  Consultants who perform services to the Company or any of its affiliates
shall be eligible to participate in the Plan if the consultants render bona fide
services and such services are not in connection with the offer or sale of
securities in a capital-raising transaction. Non-Employee Directors shall be
eligible to receive options under the Plan only in accordance with Section 11.

     (b) Selection of Optionees.   From time to time, the Committee shall
designate from such eligible persons those who will receive options and the
number of Shares to be covered by each option.

     (c) Rights of Participants.  Nothing in the Plan shall entitle any
employee, consultant, Non-Employee Director or other person to any claim or
right to be granted an option under this Plan.  Nothing in this Plan, in any
option granted pursuant to this Plan, or in any action taken hereunder shall be
construed as conferring on any individual any rights to continue in the employ
or as a consultant or Non-Employee Director of the Company or any of its
affiliates, or any other employment, consulting or similar rights.  Nothing in
the Plan or in any option granted pursuant to this Plan shall in any way
interfere with the right of the Company or any of its affiliates to terminate
the optionee's employment, consulting relationship or directorship, at any time.
Options may be granted to eligible persons whether or not they hold or have held
options under the Plan or under any other plan or arrangement of the Company or
any affiliate of the Company.

     (d) Definitions.  For the purposes of  the Plan, the term "affiliate" shall
mean any corporation, partnership or other entity in which the Company holds,
directly or indirectly, fifty percent (50%) or more of the entity's equity
interest.  The term "director" shall mean a member of the Board of Directors of
the Company.

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<PAGE>
 
6.  Type of Options.


     Options granted under the Plan shall consist solely of options not intended
to meet the requirements of section 422 of the Code.


7.  Stock Option Agreement.


     Each option granted under the Plan shall be subject to the terms and
conditions set forth herein and shall be evidenced by a stock option agreement,
which shall be executed by the Company.  The agreement shall contain such terms
and provisions, not inconsistent with the Plan, as shall be determined by the
Committee.  The Committee shall approve the form and provisions of each stock
option agreement, and any amendment thereto.  The terms and provisions of such
option agreements may vary between optionees and between different options
granted to the same optionee.  By accepting any option granted under the Plan,
an optionee will be deemed to have agreed to all provisions contained in the
option agreement.


8.  Option Price.


     (a) Determination of Option Price.  The option price shall be determined by
the Committee and shall be not less than the Fair Market Value (as defined
below) of the Shares at the time the option is granted.

     (b) Determination of Fair Market Value.  For the purposes of this Plan, the
Fair Market Value of the Shares shall mean the average (mean) of the closing bid
and asked prices of the Shares as reported on the relevant date through the
National Association of Securities Dealers Automated Quotation System or, if the
Shares are listed or admitted to trading on the Nasdaq National Market System or
any national securities exchange or if  the last reported sale price of such
Shares is generally available, the last reported sale price on such system or
exchange on the relevant date.  The Fair Market Value for any day for which
there is no such bid and asked price or last reported sales price shall be the
Fair Market Value of the next preceding day for which there is such a price.

     Should the Shares be traded otherwise than on the markets referred to
above, then the Fair Market Value shall be determined by the Committee.  If the
Shares are not publicly traded, then the Fair Market Value shall be not less
than the value established for the Shares by an independent appraisal as of a
date not more than twelve months before such value determination by the
Committee.


9.  Terms of Options.


     The Committee shall have the authority to determine the term of each
option, provided that no option shall be exercisable after the expiration of ten
(10) years from the date of option grant.  Subject to the limitation periods
hereinabove set forth, no option, or portion thereof, granted under the Plan
shall vest after the optionee ceases to be employed by (and is employed by
neither) the Company or one of its affiliates (a "termination of employment")
and all options shall terminate automatically on the earliest to occur of the
expiration of the option term (as described above), or one of the following
events:

                                      69
<PAGE>
 
     a.  Upon the expiration of ten (10) days after notice by the Company
pursuant to Section 12(d) of the sale of all or substantially all of its assets;

     b.  Thirty (30) days after a termination of employment (or within such
other period of time as may be specified by the Committee) for any reason other
than death, retirement or disability;

     c.  One year from the date of a termination of employment (or within such
other period of time as may be specified by the Committee) by reason of the
optionee's death;

     d.  Three months from the date of a termination of employment (or within
such other period of time as may be specified by the Committee) by reason of the
optionee's disability or retirement; or

     e.  As of the date of a termination of employment by reason of a
termination for cause.

     For purpose of determining whether or not a termination of employment has
occurred, (i) the transfer of an optionee between the Company and any affiliate
or between affiliates shall not be deemed a termination of employment, (ii) the
sale of any affiliate to an unaffiliated party, or the consummation of any other
transaction whereby an affiliate ceases to be an affiliate of the Company, shall
be deemed a termination of employment of any optionee who continues to be
employed by such affiliate subsequent to such sale or transaction, (iii) a
consultant shall be deemed to have incurred a termination of employment at the
time he is no longer required to perform services for the Company or any
affiliate, as determined by the Committee, (iv) an optionee shall be deemed to
have been terminated for cause if the Committee finds that the optionee has
breached his employment or service contract with the Company or an affiliate, or
has been engaged in disloyalty to the Company or an affiliate, including,
without limitation, fraud, embezzlement, theft, commission of a felony or proven
dishonesty in the course of his employment or service, or has disclosed trade
secrets or confidential information of the Company or an affiliate to persons
not entitled to receive such information, and  (v) an optionee shall be deemed
to be disabled if the optionee becomes disabled within the meaning of section
22(e)(3) of the Code.  Notwithstanding the foregoing, with respect to an option
granted to a consultant, the Committee, in its sole discretion, shall establish
the provisions concerning termination of such option at the time of option
grant.  In the absence of such establishment, the provisions of (a) through (e)
above shall apply.


10.  Exercise of Options.


     (a) Exercisability of Options.  The time or times at which or during which
options granted under this Plan may be exercised, and any conditions pertaining
to such exercise, shall be determined by the Committee and specified in the
stock option agreement or an amendment to the stock option agreement.

                                      70
<PAGE>
 
     (b)  Transferability of Options.

          (i) Nontransferability of Options.  Except as provided below, no
option granted under this Plan shall be assignable or otherwise transferable
except by will or the laws of descent and distribution or if permitted in any
specific case by the Committee, pursuant to a domestic relations order (as
defined under the Code or Title I of the Employee Retirement Income Security Act
of 1974, as amended, or the regulations thereunder).  Any option shall be
exercisable solely by the optionee during the lifetime of the optionee and,
after the death of the optionee, an option shall be exercisable (subject to the
provision of Section 9) solely by either the duly qualified personal
representative or representatives of the optionee, or the person or persons who
acquire the right to exercise such option by will or the laws of descent and
distribution and such person or persons furnish proof satisfactory to the
Company of his or their right to receive the option under the optionee's will or
under the applicable laws of descent and distribution.

          (ii) Family Transfers.  Notwithstanding the foregoing, the Committee
may provide, in a stock option agreement, that an optionee may transfer options
to family members or other persons or entities according to such terms as the
Committee may determine; provided that the optionee receives no consideration
for the transfer of  the option and the transferred option shall continue to be
subject to the same terms and conditions as were applicable to the option
immediately before the transfer.

     (c) Payment of Option Price.  The purchase price of  the Shares as to which
an option is exercised shall be paid in full in cash or in any other manner
approved by the Committee which may include, but shall not be limited to,
payment by surrender of unrestricted Shares owned by the optionee (including
Shares acquired in connection with the exercise of the option, subject to such
restrictions as the Committee deems appropriate) and having a Fair Market Value
on the date of exercise equal to the purchase price, or payment through a broker
in accordance with procedures permitted by Regulation T of the Federal Reserve
Board.  The optionee shall pay the option price and the amount of any
withholding tax due (pursuant to Subsection (d)) at the time of exercise.

     (d)  Withholding of Taxes.

          (i) Required Withholding.  All options under the Plan shall be subject
to applicable federal (including FICA), state and local tax withholding
requirements.  The Company may require the optionee or other person receiving
such Shares to pay to the Company the amount of any such taxes that the Company
is required to withhold with respect to the exercise of such options, or the
Company may deduct from other wages paid by the Company the amount of any
withholding taxes due with respect to such exercise.

          (ii) Withholding Shares.  If the Company is required to withhold any
taxes arising from an exercise of options under the Plan, the Treasurer of the
Company may, in such person's discretion, withhold delivery of Shares issuable
upon exercise of an option in an amount (valued at the Fair Market Value of such
Shares on the date of exercise of the option) sufficient to cover the Company's
withholding obligation with respect to such taxes.


                                      71
<PAGE>
 
     (e) Notice of Exercise.  Notice in writing shall be given by the optionee
to the Treasurer of the Company, or such other person as may be designated from
time to time by the Treasurer, on any day on which the offices of the Company
are generally open for the conduct of business, which notice shall indicate the
exercise of any option and specify the number of Shares desired at the option
price.

     (f) Limitations on Issuance of Shares.  The obligation of the Company to
deliver Shares upon such exercise shall be subject to all applicable laws,
rules, regulations, and such approvals by governmental agencies as may be deemed
appropriate by the Committee, including, among others, such steps as counsel for
the Company shall be deem necessary or appropriate to comply with requirements
of relevant securities laws.  Such obligation shall also be subject to the
condition that the Shares reserved for issuance upon the exercise of options
granted under the Plan shall have been duly listed on any national securities
exchange which then constitutes the principal trading market for the Shares.


11.  Formula Option Grants to Non-Employee Directors.


     A Non-Employee Director shall be entitled to receive options under the Plan
only in accordance with this Section 11.

     (a) Initial Grant.  Each Non-Employee Director who first becomes a member
of the Board of Directors of the Company after the effective date of this Plan
(as specified in Section 17) shall receive a grant of an option to purchase
8,000 Shares on the date as of which he or she first becomes a member of the
Board or at such other proximate time as the Committee may determine.

     (b) Annual Grants.  Each Non-Employee Director shall receive an annual
grant of an option to purchase 4,000 Shares; provided that such Non-Employee
Director qualifies as such on the date of grant.  The date of grant of each such
annual grant shall be December 31, the date of any year end grants to employees
under this Plan or such other proximate time as the Committee shall determine.

     (c) Option Price.  The option price of the Shares subject to an option
granted under this Section 11 shall be equal to the Fair Market Value of the
Shares on the date of grant.

     (d) Option Term and Exercisability.  The term of each option granted
pursuant to this Section 11 shall be ten years.  Options granted under this
Section 11 shall become exercisable in four equal installments of whole number
of shares on the first, second, third and fourth anniversaries of the date of
grant, unless otherwise determined by the Committee.  No option, or portion
thereof, granted under this Section 11 shall vest or become exercisable after
the optionee ceases to be a Non-Employee Director and all options shall
terminate automatically on the earliest to occur of the expiration of the option
term (as described above), or one of the following events:

          (1) Upon expiration of ten (10) days after notice by the Company
     pursuant to Section 12(d) of the sale of all or substantially all of its
     assets;

          (2) Thirty (30) days after the date the Non-Employee Director ceases
     to be a Non-Employee Director for any reason other than death, disability
     or the employment of the Non-Employee Director by the Company or an
     affiliate of the Company; or


                                      72
<PAGE>
 
          (3) One year after the date the Non-Employee Director ceases to be a
     Non-Employee Director as a result of death, disability or the Non-Employee
     Director's employment by the Company or an affiliate of the Company.

     (e) Applicability of Plan Provisions.  Except as otherwise provided in this
Section 11, options granted to Non-Employee Directors shall be subject to the
provisions of this Plan applicable to options granted to other persons.

     (f) Administration.  Except to the extent provided herein, the provisions
of this Section 11 are intended to operate automatically and not require
administration.  To the extent that any administrative determinations are
required, any determinations with respect to the provisions of this Section 11
shall be made by the Committee.  If at any time there are not sufficient Shares
available under the Plan to permit a grant as described in this Section 11, the
Grant shall be reduced pro rata (to zero, if necessary) so as not to exceed the
number of Shares then available under the Plan.


12.  Capital Change of the Company.


     (a) Adjustments.  In the event that there is a change in, reclassification
of, subdivision of, combination of, split-up or spin-off with respect to, stock
dividend on, or exchange of stock of the Company for the outstanding Shares of
the Company, the maximum aggregate number and class of Shares as to which
options may be granted under the Plan, but not the maximum aggregate number of
Shares that may be subject to grants to Non-Employee Directors, and the number
and class of Shares subject to each outstanding option and the option price
pertaining to such Shares, may (but need not) be adjusted by the Committee in
any manner in which the Committee, in is absolute discretion, deems appropriate.
Such adjustment to Shares that may be subject to options granted under the Plan
or to outstanding Shares subject to options under the Plan shall not in any
event take place with respect to any dividend payable in Shares of the Company,
unless such dividend would result in either (i) an increase of ten percent (10%)
or more in the outstanding Shares of the Company since the adoption of the Plan
or the grant of the subject option thereunder, as the case may be; or (ii) an
increase in any one transaction of five percent (5%) or more in the outstanding
Shares.

     (b) Consolidation or Merger of the Company.  If the Company shall be
consolidated or merged with another corporation, each optionee who has an
outstanding option hereunder shall, at the time for issuance of Shares upon
exercise or partial exercise of such option, be entitled to receive the same
number and kind of shares, or the same amount of other property, cash, or
securities as the optionee would have been entitled to receive upon the
happening of such consolidation or merger if the optionee had been, immediately
prior to such event, the holder of the number of Shares to which the optionee
has an outstanding option hereunder (to the extent of such exercise or partial
exercise) adjusted in the manner provided in this Section, or, if another
corporation shall be the survivor, such other corporation shall substitute
therefor a substantially equivalent number and kind of shares of stock or other
property, cash, or securities of such other corporation.  Notwithstanding
anything in the Plan to the contrary, in the event of a consolidation or merger
described above, the Committee shall not have the right to take any actions
described in the Plan that would make the consolidation or merger ineligible for
pooling of interests accounting treatment or that would make the consolidation
or merger ineligible for desired tax treatment if, in the absence of such right,
the consolidation or merger would qualify for such treatment and the Company
intends to use such treatment with respect to the consolidation or merger.


                                      73
<PAGE>
 
     (c) Further Adjustments.  In the event that there shall be any change,
other then as specified above, in the number or kind of the outstanding Shares
or of any stock or other securities into which such Shares shall have been
changed or for which they shall have been exchanged, or in the event of a
dividend to holders of the Shares payable other than in cash or stock of the
Company, then if the Committee shall determine that such change equitably
requires an adjustment in the number or kind of Shares available for grants
under the Plan (other than grants to Non-Employee Directors) but not yet covered
by an option, or an adjustment with respect to the number, price or kind of
Shares then subject to an option or options, such adjustment shall be made and
shall be effective and binding for all purposes of the Plan.

     (d) Sale of Substantially all Assets.  Notwithstanding the above, if all or
substantially all of the assets of the Company shall be sold or exchanged
(otherwise than by merger or consolidation), each optionee shall have the right
to exercise such option in full, to the extent that it has not previously been
exercised within ten (10) days after the notice by the Company of the right to
exercise, and any such option not so exercised shall lapse.


13.  Termination and Amendment.


     (a) Termination and Amendment of Plan.  Unless the Plan shall theretofore
have been terminated as hereinafter provided, it shall terminate on, and no
option shall be granted thereunder after, the second anniversary of the
effective date of the Plan (as specified in Section 17).  The Board of
Directors, in its sole discretion, may, at any time and from time to time,
terminate the Plan or make such modifications or amendments thereof as it shall
deem advisable.

     (b) Termination and Amendment of Outstanding Options.  The Committee may
authorize amendments of outstanding options including without limitation the
reduction of the option prices specified therein (or the granting of new options
at lower prices upon the cancellation of outstanding options), so long as all
options granted hereunder outstanding at any one time shall not call for
issuance of more Shares than those provided in Section 4 and so long as the
provisions of any amended option would have been permissible under the Plan if
such option had been originally granted as of the date of such amendment with
such amended terms.   No termination, modification, or amendment of this Plan
may adversely affect any then outstanding option under such Plan without the
consent of the person to whom such option has been granted.  Whether or not the
Plan has terminated, an outstanding option may be terminated or amended under
Section 18(c) or may be amended by agreement of the Company and the optionee
consistent with the Plan.

     (c) Governing Document.  The Plan shall be the controlling document.  No
other statements, representations, explanatory materials or examples, oral or
written, may amend the Plan in any manner.  The Plan shall be binding upon and
enforceable against the Company and its successors and assigns.


14.  Funding of the Plan.


     This Plan shall be unfunded.  The Company shall not be required to
establish any special or separate fund or to make any other segregation of
assets to assure the payment of grants under this Plan.  In no event shall
interest be paid or accrued on any grant.


                                      74
<PAGE>
 
15.  No Fractional Shares


     No fractional Shares shall be issued or delivered pursuant to the Plan or
any option.  The Committee shall determine whether cash, other awards or other
property shall be issued or paid in lieu of such fractional shares or whether
such fractional shares or any rights thereto shall be forfeited or otherwise
eliminated.


16.  Headings.


     Section headings are for reference only.  In the event of a conflict
between a title and the content of a Section, the content of the Section shall
control.


17.  Effective Date.


     The Plan shall be effective on December 4, 1997, the date of its adoption
by the Board of Directors of the Company.


18.  Miscellaneous.


     (a) Grants in Connection with Corporate Transactions and Otherwise. Nothing
contained in this Plan shall be construed to (i) limit the right of the
Committee to make grants under this Plan in connection with the acquisition, by
purchase, lease, merger, consolidation or otherwise, of the business or assets
of any corporation, firm or association, including options to employees thereof
who become employees of the Company, or for other proper corporate purposes, or
(ii) limit the right of the Company to grant stock options or make other awards
outside of this Plan. Without limiting the foregoing, the Committee may make a
grant to an employee of another corporation who becomes an employee by reason of
a corporate merger, consolidation, acquisition of stock or property,
reorganization or liquidation involving the Company or any of its subsidiaries
in substitution for a stock option or restricted stock grant made by such
corporation. The terms and conditions of the substitute grants may vary from the
terms and conditions required by the Plan and from those of the substituted
stock incentives. The Committee shall prescribe the provisions of the substitute
grants.

     (b) Rights of an Optionee.  No optionee shall have any rights of a
shareholder with respect to any Shares unless and until the optionee has
exercised the option with respect to such Shares, has paid the full option price
therefor, and the Shares have been issued to the optionee on the books of the
Company.

     (c) Compliance with Law.  The Plan and the exercise of options shall be
subject to all applicable laws and to approvals by any governmental or
regulatory agency as may be required.  With respect to persons subject to
section 16 of the Exchange Act, it is the intent of the Company that the Plan
and all transactions under the Plan comply with all applicable provisions of
Rule 16b-3 or its successors under the Exchange Act.  The Committee may revoke
any grant if it is contrary to law or modify a grant to bring it into compliance
with any valid and mandatory government regulation.  The Committee may also
adopt rules regarding the withholding of taxes on payments to optionees.  The
Committee may, in its sole discretion, agree to limit its authority under this
Section.


                                      75
<PAGE>
 
     (d) Governing Law.  The validity, construction, interpretation and effect
of the Plan and stock option agreements issued under the Plan shall exclusively
be governed by and determined in accordance with the law of the Commonwealth of
Pennsylvania, to the extent such law is not superseded by or inconsistent with
Federal law.


                                      76

<PAGE>
 
                                                                  EXHIBIT 10.1.2


                            SEI INVESTMENTS COMPANY
                          OPTION SHARE DEFERRAL PLAN


                         (EFFECTIVE DECEMBER 1, 1997)



                                      77

<PAGE>
 
                            SEI INVESTMENTS COMPANY


                          OPTION SHARE DEFERRAL PLAN
                          --------------------------

     In recognition of the services provided to SEI Investments Company (the
"Company") by certain of its officers and other key management and highly
compensated employees, the Company has established the SEI Investments Company
Option Share Deferral Plan (the "Plan") to offer such employees the opportunity
to defer receipt of the "profit shares," as defined herein, when they exercise
options under the Company's Stock Option Plan.  The Plan shall be effective,
December 1, 1997, under the terms and conditions hereinafter set forth.



                                 TABLE OF CONTENTS
                                 -----------------



                                                                            Page
                                                                            ----



Article 1  Definitions and Construction......................................  1



Article 2  Participant Deferrals and Accounts................................  3



Article 3  Distributions to Participants.....................................  4



Article 4  Death Benefits....................................................  6



Article 5  Vesting...........................................................  6



Article 6  Nature of Company's Obligation....................................  6



Article 7  Administration....................................................  7



Article 8  Amendment and Termination.........................................  8



Article 9  Miscellaneous.....................................................  8


                                      78
<PAGE>
 
                                   ARTICLE 1



                         DEFINITIONS AND CONSTRUCTION
                         ----------------------------



          Sec. 1.01  DEFINITIONS. Whenever used in this Plan:
                     -----------                             

          "ACCOUNT" means entries maintained in the records of the Company which
reflect the number of  Profit Shares deferred by a Participant pursuant to
Section 2.01 or which otherwise stand to the credit of the Participant under the
Plan.

          "AFFILIATE" means any corporation, partnership or other entity in
which the Company holds, directly or indirectly, fifty percent (50%) or more of
the entity's equity interest.

          "BENEFICIARY" means any individual or entity designated by a
Participant pursuant to Section 4.02 to receive death benefits described in
Section 4.01 subsequent to the Participant's death.

          "BOARD" means the Board of Directors or other governing body of the
Company.

          "CODE" means the Internal Revenue Code of 1986, as amended, and any
successor statute of similar nature and purpose.

          "COMMON STOCK" means shares of Common Stock, par value $.01 per share,
of the Company.

          "COMPANY" means SEI Investments Company or any successor thereto.

          "DEFERRAL ELECTION FORM" means the form provided to Participants by
the Plan Administrator on which the Participants elect (a) to defer Profit
Shares in accordance with Section 2.01, (b) to have cash dividends payable with
respect to Common Stock credited to his or her Account in the form of additional
Profit Shares or paid in cash, in accordance with Section 2.02, and (c) the time
of distribution of  Profit Shares credited to his or her Account in accordance
with Section 3.01.

          "EFFECTIVE DATE" means December 1, 1997.

          "ELIGIBLE EMPLOYEE" means an Employee who (a) is a participant in the
Stock Option Plan, and (b) is designated and approved for participation in the
Plan by the Plan Administrator, in its sole discretion.

          "EMPLOYEE" means any individual employed by the Company (as determined
in accordance with the personnel policies and practices of the Company).

          "FAIR MARKET VALUE" means the fair market value of Common Stock as
determined by the Plan Administrator in accordance with the rules established
under the Stock Option Plan for making such determination.


                                      79
<PAGE>
 
          "HARDSHIP" means an unforeseeable financial emergency that is an
unexpected need for cash arising from an illness, casualty loss, sudden
financial reversal, or other such unforeseeable occurrence.

          "OPTION SHARE DEFERRAL" means a deferral of Profit Shares by a
Participant pursuant to Section 2.01 upon exercise of a nonqualified stock
option under the Stock Option Plan.

          "PARTICIPANT" means (a) any Eligible Employee who makes an Option
Share Deferral pursuant to Section 2.01, or (b) any former Eligible Employee who
has a balance in his or her Account greater than zero which has not been fully
distributed pursuant to Article 3 or 4.

          "PLAN" means this SEI Investments Company Option Share Deferral Plan.

          "PLAN ADMINISTRATOR" means the individual or committee designated as
the administrator of the Plan by the Board or its designee, or, if such position
is vacant, the Company.

          "PLAN YEAR" means the calendar year.

          "PROFIT SHARES" means with respect to an exercise of an option under
the Stock Option Plan, a number of shares of Common Stock (rounded to the
nearest one-one hundredth of a share) equal to (a) the excess of the Fair Market
Value per share of Common Stock at the date of exercise multiplied by the number
of shares covered by the option exercise over the aggregate exercise price of
the shares so purchased, divided by (b) the Fair Market Value per share at the
date of exercise.

          "STOCK OPTION PLAN" means the SEI Investments Company Stock Option
Plan or any successor thereto.

          "TERMINATION FROM EMPLOYMENT" means, for any Participant, his
termination from employment for any reason other than death, including
retirement, disability, discharge or any absence that causes him to cease to be
an employee of the Company and any affiliates.

          Sec. 1.02  GENDER AND NUMBER.  The masculine pronoun shall include the
                     -----------------                                          
feminine; the singular shall include the plural; and vice versa.


                                      80
<PAGE>
 
                                   ARTICLE 2


                      PARTICIPANT DEFERRALS AND ACCOUNTS
                      ----------------------------------


          Sec. 2.01  OPTION SHARE DEFERRALS.
                     ---------------------- 

          (a) An Eligible Employee may irrevocably elect on the Deferral
Election Form to defer receipt of all or a portion of the Profit Shares pursuant
to the exercise of a nonqualified stock option under the Stock Option Plan for a
Plan Year, subject to such rules and procedures as the Plan Administrator deems
appropriate.  Such Deferral Election Form must be provided to the Plan
Administrator by November 30 of the calendar year prior to the beginning of the
Plan Year in which the options are exercised; at any time on or before provided,
however, that such Deferral Election Form may be provided to the Administrator
at any time on or before December 31, 1997 for deferrals to be made during the
Plan Year beginning January 1, 1998.  Any election hereunder shall apply only to
the extent that payment of the exercise price for the option to which the
election relates is satisfied by surrender (including a constructive surrender)
of unrestricted mature shares of Common Stock owned by the Participant having a
Fair Market Value on the date of exercise equal to the exercise price.  Any
election hereunder shall be irrevocable with respect to option exercises during
the Plan Year to which it relates.

          (b) Subject to such reasonable rules as may be prescribed by the Plan
Administrator, the number of Profit Shares deferred under this Section 2.01
shall be credited to a Participant's Account immediately upon the exercise of
the option from which such Profit Shares derive.  The number of Profit Shares
credited to the Participant's Account shall be reduced as necessary to satisfy
any applicable employment tax withholding obligations of the Company in
connection with the option exercise, all as determined by the Plan Administrator
in accordance with procedures similar to those established under the Stock
Option Plan.

          (c) The Plan Administrator shall provide a statement at least annually
to each Participant showing such information as is appropriate, including the
aggregate number of Profit Shares credited to his or her Account.

          Sec. 2.02  ACCOUNT ADJUSTMENTS.
                     ------------------- 

          (a) In the event a dividend is declared with respect to the Common
Stock, a Participant's Account shall be credited with additional Profit Shares
(rounded to the nearest one-one hundredth of a share) equal to the amount of the
aggregate cash dividend that would have been distributed on shares represented
by the Profit Shares then credited to a Participant's Account, divided by the
then current per share Fair Market Value of the Common Stock, unless the
Participant has made an irrevocable election on a Deferral Election Form to
receive instead an amount equal to such cash dividends at the time such
dividends become payable.


                                      81
<PAGE>
 
          (b) Unless otherwise determined by the Plan Administrator, in the
event of a stock split, stock dividend, reclassification, reorganization or
other capital adjustment in the shares of Common Stock, the number of Profit
Shares then credited to the Participant's Account shall be adjusted in the same
manner as the shares of the Common Stock are adjusted.



                                   ARTICLE 3


                         DISTRIBUTIONS TO PARTICIPANTS
                         -----------------------------


          Sec. 3.01  DISTRIBUTION UPON TERMINATION FROM EMPLOYMENT OR AFTER A
                     --------------------------------------------------------
FIXED PERIOD OF TIME.  A Participant shall irrevocably elect on the Deferral
- ---------------------                                                       
Election Form to receive a number of shares of Common Stock equal to the number
of  Profit Shares credited to his or her Account, as a result of a deferral
election made pursuant to Section 2.01 or an adjustment in his or her Account
pursuant to the terms of the Plan, upon:

     (a)  the Participant's Termination from Employment;

     (b)  a specified date or the expiration of a specified number of years
          after the date of exercise of the option from which the Profit Shares
          are derived; provided that in no event may such specified date be less
          than, or deferral period end before, three (3) years from the date of
          exercise of the option from which such Profit Shares are derived;

     (c)  the earlier of (a) or (b); or

     (d)  the later of (a) or (b).

A Participant shall receive the entire number of shares of Common Stock to which
he or she is entitled in a single distribution at the time determined above,
unless the Participant has made an irrevocable election on the Deferral Election
Form or supplement thereto, at least thirteen (13) months in advance of the
distribution date determined above, to receive such shares instead in
substantially equal annual installments over a period of not more than five (5)
years from the distribution date determined above.

          Sec. 3.02  WITHDRAWALS ON ACCOUNT OF HARDSHIP.  Prior to the date a
                     ----------------------------------                      
Participant becomes entitled to a distribution under Section 3.01, the
Participant may request, and the Plan Administrator, in its sole and absolute
discretion, may approve, a withdrawal of all or a portion of the Profit Shares
credited to the Participant's Account on account of a Hardship.  The Plan
Administrator may request the Participant to provide such information as it
deems necessary and proper for it to determine the existence of a Hardship.  The
Plan Administrator shall review the Participant's request and determine the
extent, if any, to which such request is justified.  It is intended that the
Plan Administrator's determination as to whether a Participant has suffered a
Hardship shall be made consistent with the requirements for an "unforeseeable
emergency," within the meaning of  section 457(d) of the Code.  Any such
withdrawal shall be limited to an amount reasonably necessary to meet the
Hardship.


                                      82
<PAGE>
 
          Sec. 3.03  WITHDRAWALS WITH PENALTY.  Prior to the date a Participant
                     ------------------------                                  
becomes entitled to a distribution under Section 3.01, the Participant may
request and the Plan Administrator, in its sole and absolute discretion, may
approve, a withdrawal of all or a portion of the Profit Shares credited to the
Participant's Account.  In the event of a withdrawal pursuant to this Section
3.03, the Participant shall forfeit from his or her Account a number (rounded up
to the next whole number) of Profit Shares equal to ten (10%) percent of the
number of Profit Shares withdrawn.  The forfeited Profit Shares shall be
deducted from the Participant's Account prior to giving effect to the requested
withdrawal, and neither the Participant, nor his or her Beneficiary or any other
person claiming an interest in the Participant's Account shall have any right or
claim to the forfeited amount.

          Sec. 3.04  ACCELERATION OF PAYMENTS.
                     ------------------------ 

     (a) In the event of the liquidation, dissolution or winding up of the
Company or the distribution or sale of all or substantially all of the Company's
assets and property, the Company shall immediately distribute to the Participant
shares of Common Stock equal to the number of  Profit Shares then credited to
the Participant's Account.

     (b) In the event the Plan Administrator determines, based on a change in
the applicable tax laws, a published ruling or similar announcement issued by
the Internal Revenue Service, a regulation issued by the Secretary of the
Treasury or his or her delegate, a decision by a court of competent jurisdiction
involving a Participant, or a closing agreement involving a Participant made
under section 7121 of the Code that is approved by the Commissioner, that a
Participant has recognized or will recognize income for Federal income tax
purposes with respect to any amounts that are or will be payable to the
Participant under this Article 3 before they otherwise would be paid to the
Participant, upon the request of the Participant, the Plan Administrator shall
immediately distribute to the Participant shares of Common Stock equal to the
number of Profit Shares with a Fair Market Value at the time of such
distribution equal to the amount of income so recognized.

     (c) The Company reserves the right, in its sole discretion, upon
termination of the Plan or at any other time to accelerate payments hereunder by
distributing to Participants' shares of Common Stock equal to the number of
Profit Shares then credited to the Participants' Accounts in full satisfaction
of its obligations hereunder.


                                      83
<PAGE>
 
                                   ARTICLE 4


                                DEATH BENEFITS
                                --------------


          Sec. 4.01  DISTRIBUTION OF BENEFITS UPON DEATH OF PARTICIPANT.  In the
                     --------------------------------------------------         
event of a Participant's death prior to the complete distribution of his or her
Account pursuant to Article 3, shares of Common Stock equal to the number of
Profit Shares remaining in the Participant's Account shall be distributed to the
Participant's Beneficiary in a single distribution as soon as administratively
practicable following the Participant's death.

          Sec. 4.02  DESIGNATION OF BENEFICIARY.  For purposes of Section 4.01,
                     --------------------------                                
the Participant's Beneficiary shall be the person or persons so designated by
the Participant in a written instrument submitted to the Plan Administrator.  In
the event the Participant fails to properly designate a Beneficiary, his or her
Beneficiary shall be the Participant's surviving spouse or, if none, his or her
estate.



                                   ARTICLE 5


                                    VESTING
                                    -------


          Sec. 5.01  FULL VESTING OF BENEFITS.   A Participant, at all times,
                     ------------------------                                
shall have a fully (100%) vested interest in his or her Account.



                                   ARTICLE 6


                        NATURE OF COMPANY'S OBLIGATION
                        ------------------------------


          Sec. 6.01  FUNDING OF BENEFITS.  In any event, the obligation of the
                     -------------------                                      
Company hereunder shall constitute a general, unsecured obligation, payable
solely out of general assets of the Company, and anything contained herein to
the contrary notwithstanding, until delivery of Common Stock is made to the
Participant or the Participant's Beneficiary hereunder, neither the Participant,
nor the Participant's Beneficiary or any other person claiming an interest
hereunder shall have any right to or property interest in, any Common Stock or
other specific assets of the Company.

          Sec.  6.02  NO RIGHTS AS SHAREHOLDER.  Until delivery of Common Stock
                      ------------------------                                 
is made to the Participant or the Participant's Beneficiary hereunder, no
Participant, Participant's Beneficiary or any other person claiming an interest
hereunder shall have any rights as a shareholder of the Company, including the
right to any cash dividends (except as provided in Section 2.01) or the right to
vote, with respect to any Common Stock or the Profit Shares credited to the
Participant's Account hereunder.


                                      84
<PAGE>
 
                                   ARTICLE 7



                                ADMINISTRATION
                                --------------


          Sec. 7.01  PLAN ADMINISTRATOR.  The individual or committee designated
                     ------------------                                         
by the Board as the Plan Administrator of the Plan shall be the administrator of
the Plan for purposes of the Employee Retirement Income Security Act of 1974
(ERISA), as amended from time to time.  However, if such position is vacant, the
Company shall be the Plan Administrator.

          Sec. 7.02  DUTIES AND POWERS OF PLAN ADMINISTRATOR.  The Plan
                     ---------------------------------------           
Administrator shall have full discretionary power and authority to construe,
interpret and administer this Plan and may, to the extent permitted by law, make
factual determinations, correct defects, supply omissions and reconcile
inconsistencies to the extent necessary to effectuate the Plan and, subject to
Section 7.03, the Plan Administrator's actions in doing so shall be final and
binding on all persons interested in the Plan.  The Plan Administrator may from
time to time adopt rules and regulations governing the operation of this Plan
and may employ and rely on such legal counsel, such actuaries, such accountants
and such agents as it may deem advisable to assist in the administration of the
Plan.

          Sec. 7.03  CLAIMS PROCEDURE.
                     ---------------- 

          (a) The Company will advise each Participant and Beneficiary of any
benefits to which he or she is entitled under the Plan.  If any person believes
that the Company has failed to advise him or her of any benefit to which he or
she is entitled, he or she may file a written claim with the Plan Administrator.
The claim shall be reviewed, and a response provided, within a reasonable time
after receiving the claim.  Any claimant who is denied a claim for benefits
shall be provided with written notice setting forth:

               (1) the specific reasons or reasons for the denial;

               (2) specific reference to pertinent Plan provisions on which
denial is based;

               (3) a description of any additional material or information
necessary for the claimant to perfect the claim; and

               (4) an explanation of the claim review procedure set forth in
paragraph (b), below.

                                      85
<PAGE>
 
          (b) Within 60 days of receipt by a claimant of a notice denying a
claim under the Plan under paragraph (a), the claimant or his or her duly
authorized representative may request in writing a full and fair review of the
claim by the Plan Administrator or a claims committee appointed by the Plan
Administrator (hereinafter the "Committee").  The Committee may extend the 60-
day period where the nature of the benefit involved or other attendant
circumstances make such extension appropriate.  In connection with such review,
the claimant or his or her duly authorized representative may review pertinent
documents and may submit issues and comments in writing.  The Committee shall
make a decision promptly, and not later than 60 days after the Committee's
receipt of a request for review, unless special circumstances (such as the need
to hold a hearing, if the Committee deems one necessary) require an extension of
time for processing, in which case a decision shall be rendered as soon as
possible, but not later than 120 days after receipt of a request for review.
The decision on review shall be in writing and shall include specific reasons
for the decision, written in a manner calculated to be understood by the
claimant, and specific references to the pertinent Plan provisions on which the
decision is based.



                                   ARTICLE 8


                           AMENDMENT AND TERMINATION
                           -------------------------


          Sec. 8.01  AUTHORITY TO AMEND.  The Board or its designee may amend
                     ------------------                                      
the Plan at any time in any manner whatsoever.  Notwithstanding the above, no
amendment shall operate to reduce the benefit amount accrued on behalf of a
Participant on the effective date of the amendment.

          Sec. 8.02  RIGHT TO TERMINATE.  Continuance of the Plan is completely
                     ------------------                                        
voluntary and is not assumed as a contractual obligation of the Company.  The
Company shall have the right at any time for any reason to terminate the Plan,
by action of the Board; provided, however, that the Plan termination shall not
operate to reduce the amount accrued on behalf of a Participant on the effective
date of the Plan's termination.



                                   ARTICLE 9



                                 MISCELLANEOUS
                                 -------------


          Sec. 9.01  NO RIGHT TO EMPLOYMENT.  Nothing contained herein (a) shall
                     ----------------------                                     
be deemed to exclude a Participant from any compensation, bonus, pension,
insurance, severance pay or other benefit to which he or she otherwise is or
might become entitled to as an Employee or (b) shall be construed as conferring
upon an Employee the right to continue in the employ of the Company.

          Sec. 9.02  NO COMPENSATION FOR OTHER BENEFITS.  Except as provided
                     ----------------------------------                     
herein, any amounts paid hereunder shall not be deemed salary or other
compensation to a Participant for the purposes of computing benefits to which he
or she may be entitled under any other arrangement established by the Company
for the benefit of its employees.


                                      86
<PAGE>
 
          Sec. 9.03  RIGHTS AND OBLIGATIONS.  The rights and obligations created
                     ----------------------                                     
hereunder shall be binding on a Participant's heirs, executors and
administrators and on the successors and assigns of the Company.

          Sec. 9.04  PAYMENTS TO REPRESENTATIVES.  If any Participant or
                     ---------------------------                        
Beneficiary entitled to receive any benefits hereunder is determined by the Plan
Administrator, or is adjudged to be, legally incapable of giving valid receipt
and discharge for such benefits, the benefits shall be paid to a duly appointed
and acting conservator or guardian, or other legal representative of such
Participant or Beneficiary, if any, and if no such legal representative is
appointed and acting, to such person or persons as the Plan Administrator may
designate.  Such payments shall, to the extent made, be deemed a complete
discharge for such payments under this Plan.

          Sec. 9.05  NO FRACTIONAL SHARES.  No fractional shares of Common Stock
                     --------------------                                       
shall be issued or delivered pursuant to the Plan.  The Plan Administrator shall
determine whether cash shall be paid in lieu of such fractional shares or
whether such fractional shares or any rights thereto shall be forfeited or
otherwise eliminated.

          Sec. 9.06  NONALIENATION.  Except as hereinafter provided with respect
                     -------------                                              
to family disputes, the rights of any Participant under this Plan are personal
and may not be assigned, transferred, pledged or encumbered.  Any attempt to do
so shall be void.  In cases of family disputes, the Company will observe the
terms of the Plan unless and until ordered to do otherwise by a state or Federal
court.  As a condition of participation, a Participant agrees to hold the
Company harmless from any claim that arises out of the Company's obeying the
final order of any state or Federal court, whether such order effects a judgment
of such court or is issued to enforce a judgment or order of another court.  For
purposes of this Section 9.06, "family dispute" means a dispute relating to
provision of child support, alimony payments, or marital property rights to a
spouse, former spouse or other dependent of the Participant.

          Sec. 9.07  LIMITATIONS ON OBLIGATIONS.  Neither the Company nor any
                     --------------------------                              
member of the Board shall be responsible or liable in any manner to any
Participant, Beneficiary or any person claiming through them for any benefit or
action taken or omitted in connection with the granting of benefits, the
continuation of benefits, or the interpretation and administration of this Plan.

          Sec. 9.08  WITHHOLDING.  If the Company is required to withhold
                     -----------                                         
amounts under applicable federal, state or local tax laws, rules or regulations,
the Company shall be entitled to deduct and withhold such amounts from any
payment made pursuant to this Plan.

          Sec. 9.09  LOST PAYEES.  Any benefit payable under the Plan shall be
                     -----------                                              
deemed forfeited if the Plan Administrator is unable to locate the Participant
or Beneficiary to whom payment is due; provided, however, that such benefit
shall be reinstated if a claim is made by the Participant or Beneficiary for the
forfeited benefit.

          Sec. 9.10  GOVERNING LAW.  The Plan shall be construed in accordance
                     -------------                                            
with and governed by the laws of the Commonwealth of Pennsylvania.


                                      87

<PAGE>
 
                                                                  Exhibit 10.3.1

                              RESOLUTIONS OF THE
                             BOARD OF DIRECTORS OF
                            SEI INVESTMENTS COMPANY

     RESOLVED, that the Stock Purchase Plan shall be amended effective October 
15, 1997, except to the extent an earlier or later effective date is specified,
to reflect the following:

     Addition of Lump Sum Stock Purchases. Participants may purchase Common
     ------------------------------------
     Stock under the Stock Purchase Plan with a lump sum payment, in addition to
     purchases through payroll deductions;

     Change in Names. The change in the name of the Company from SEI Corporation
     ---------------
     to SEI Investments Company, and the corresponding change in the name of the
     Stock Purchase Plan to the SEI Investments Employee Stock Purchase Plan;

                                      88

<PAGE>
 
                                                                  EXHIBIT 10.5.1


                               AMENDMENT 1997-1
                                      TO
                                SEI CORPORATION
                             STOCK OPTION PLAN FOR
                            NON-EMPLOYEE DIRECTORS

The Board of Directors of SEI Investments Company (formerly known as SEI 
Corporation), a Pennsylvania corporation, by resolution dated December 4, 1997, 
has amended The SEI Corporation Stock Option Plan for Non-Employee Directors 
(the "Plan"), effective as of such date, as follows:

     1.   All references in the Title and text of the Plan to "SEI Corporation" 
          shall refer instead to "SEI Investments Company."

     2.   Section 8(c) of the Plan shall be amended in its entirety to read as 
          follows:

     (c)  Except as provided below, no option granted under this Plan shall be 
          assignable or otherwise transferable except by will or the laws of
          descent and distribution or if permitted in any specific case by the
          Committee, pursuant to a domestic relations order (as defined under
          the Code or Title I of the Employee Retirement Income Security Act of
          1974, as amended, or the regulations thereunder). Any option shall be
          exercisable solely by the optionee during the lifetime of the optionee
          and, after the death of the optionee, an option shall be exercisable,
          to the extent otherwise exercisable hereunder, solely by either the
          duly qualified personal representative or representatives of the
          optionee, or the person or persons who acquire the right to exercise
          such option by will or the laws of descent and distribution and such
          person or persons furnish proof satisfactory to the Company of his or
          their right to receive an option under the optionee's will or under
          the applicable laws of descent and distribution. Notwithstanding the
          foregoing, the Committee may provide, in a stock option agreement,
          that an optionee may transfer options to family members or other
          persons or entities according to such terms as the Committee may
          determine; provided that the optionee receives no consideration for
          the transfer of the option and the transferred option shall continue
          to be subject to the same terms and conditions as were applicable to
          the option immediately before the transfer.


                                      89

<PAGE>
 
 
                                                                  EXHIBIT 10.5.2


                            SEI INVESTMENTS COMPANY
                          OPTION SHARE DEFERRAL PLAN
                          FOR NON-EMPLOYEE DIRECTORS


                         (EFFECTIVE DECEMBER 1, 1997)



                                      90
<PAGE>
 
                            SEI INVESTMENTS COMPANY
                          OPTION SHARE DEFERRAL PLAN
                          FOR NON-EMPLOYEE DIRECTORS



     In recognition of the services provided to SEI Investments Company (the
"Company") by its non-employee directors, as defined herein, the Company has
established the SEI Investments Company Option Share Deferral Plan For Non-
Employee Directors (the "Plan") to offer such directors the opportunity to defer
receipt of the "profit shares," as defined herein, when they exercise options
under the Company's Stock Option Plan.  The Plan shall be effective, December 1,
1997, under the terms and conditions hereinafter set forth.



                               TABLE OF CONTENTS
                               -----------------



                                                                            Page
                                                                            ----



ARTICLE 1  DEFINITIONS AND CONSTRUCTION......................................  1



ARTICLE 2  PARTICIPANT DEFERRALS AND ACCOUNTS................................  3



ARTICLE 3  DISTRIBUTIONS TO PARTICIPANTS.....................................  4



ARTICLE 4  DEATH BENEFITS....................................................  6



ARTICLE 5  VESTING...........................................................  6



ARTICLE 6  NATURE OF COMPANY'S OBLIGATION....................................  6



ARTICLE 7  ADMINISTRATION....................................................  7



ARTICLE 8  AMENDMENT AND TERMINATION.........................................  8



ARTICLE 9  MISCELLANEOUS.....................................................  8


                                      91
<PAGE>
 
                                   ARTICLE 1



                         DEFINITIONS AND CONSTRUCTION
                         ----------------------------
 

          Sec. 1.01  DEFINITIONS. Whenever used in this Plan:
                     -----------                             

          "ACCOUNT" means entries maintained in the records of the Company which
reflect the number of  Profit Shares deferred by a Participant pursuant to
Section 2.01 or which otherwise stand to the credit of the Participant under the
Plan.

          "AFFILIATE" means any corporation, partnership or other entity in
which the Company holds, directly or indirectly, fifty percent (50%) or more of
the entity's equity interest.

          "AFFILIATE" means any corporation, partnership or other entity in
which the Company holds, directly or indirectly, fifty percent (50%) or more of
the entity's equity interest.

          "BENEFICIARY" means any individual or entity designated by a
Participant pursuant to Section 4.02 to receive death benefits described in
Section 4.01 subsequent to the Participant's death.

          "BOARD" means the Board of Directors or other governing body of the
Company.

          "CESSATION OF SERVICES" means ceasing to serve on the Board or, with
respect to a Participant who has ceased to be a Non-Employee Director by reason
of his or her becoming an employee of the Company or any Affiliate, his or her
termination from employment with the Company and any Affiliates, if later.

          "CODE" means the Internal Revenue Code of 1986, as amended, and any
successor statute of similar nature and purpose.

          "COMMON STOCK" means shares of Common Stock, par value $.01 per share,
of the Company.

          "COMPANY" means SEI Investments Company or any successor thereto.

          "DEFERRAL ELECTION FORM" means the form provided to Participants by
the Plan Administrator on which the Participants elect (a) to defer Profit
Shares in accordance with Section 2.01, (b) to have cash dividends payable with
respect to Common Stock credited to his or her Account in the form of additional
Profit Shares or paid in cash, in accordance with Section 2.02, and (c) the time
of distribution of  Profit Shares credited to his or her Account in accordance
with Section 3.01.


                                      92
<PAGE>
 
          "EFFECTIVE DATE" means December 1, 1997.

          "FAIR MARKET VALUE" means the fair market value of Common Stock as
determined by the Plan Administrator in accordance with the rules established
under the Stock Option Plan for making such determination.

          "HARDSHIP" means an unforeseeable financial emergency that is an
unexpected need for cash arising from an illness, casualty loss, sudden
financial reversal, or other such unforeseeable occurrence.

          "NON-EMPLOYEE DIRECTOR" means a member of the Board who is not also an
employee of the Company or any Affiliate.

          "OPTION SHARE DEFERRAL" means a deferral of Profit Shares by a
Participant pursuant to Section 2.01 upon exercise of a stock option under the
Stock Option Plan.

          "PARTICIPANT" means (a) a Non-Employee Director who makes an Option
Share Deferral pursuant to Section 2.01, or (b) any former Non-Employee Director
who has a balance in his or her Account greater than zero which has not been
fully distributed pursuant to Article 3 or 4.

          "PLAN" means this SEI Investments Company Option Share Deferral Plan
for Non-Employee Directors.

          "PLAN ADMINISTRATOR" means the individual or committee designated as
the administrator of the Plan by the Board or its designee, or, if such position
is vacant, the Company.

          "PLAN YEAR" means the calendar year.

          "PROFIT SHARES" means with respect to an exercise of an option under
the Stock Option Plan, a number of shares of Common Stock (rounded to the
nearest one-one hundredth of a share) equal to (a) the excess of the Fair Market
Value per share of Common Stock at the date of exercise multiplied by the number
of shares covered by the option exercise over the aggregate exercise price of
the shares so purchased, divided by (b) the Fair Market Value per share at the
date of exercise.

          "STOCK OPTION PLAN" means the SEI Investments Company Stock Option
Plan for Non-Employee Directors or the 1997 Stock Option Plan or any successor
thereto.

          Sec. 1.02  GENDER AND NUMBER.  The masculine pronoun shall include the
                     -----------------                                          
feminine; the singular shall include the plural; and vice versa.


                                      93
<PAGE>
 
                                   ARTICLE 2


                      PARTICIPANT DEFERRALS AND ACCOUNTS
                      ----------------------------------
 

          Sec. 2.01  OPTION SHARE DEFERRALS.
                     ---------------------- 

          (a) A Non-Employee Director may irrevocably elect on the Deferral
Election Form to defer receipt of all or a portion of the Profit Shares pursuant
to the exercise of a stock option under the Stock Option Plan for a Plan Year,
subject to such rules and procedures as the Plan Administrator deems
appropriate.  Such Deferral Election Form must be provided to the Plan
Administrator by November 30 of the calendar year prior to the beginning of the
Plan Year in which the options are exercised; at any time on or before provided,
however, that such Deferral Election Form may be provided to the Administrator
at any time on or before December 31, 1997 for deferrals to be made during the
Plan Year beginning January 1, 1998.  Any election hereunder shall apply only to
the extent that payment of the exercise price for the option to which the
election relates is satisfied by surrender (including a constructive surrender)
of unrestricted mature shares of Common Stock owned by the Participant having a
Fair Market Value on the date of exercise equal to the exercise price.  Any
election hereunder shall be irrevocable with respect to option exercises during
the Plan Year to which it relates.

          (b) Subject to such reasonable rules as may be prescribed by the Plan
Administrator, the number of Profit Shares deferred under this Section 2.01
shall be credited to a Participant's Account immediately upon the exercise of
the option from which such Profit Shares derive.

          (c) The Plan Administrator shall provide a statement at least annually
to each Participant showing such information as is appropriate, including the
aggregate number of Profit Shares credited to his or her Account.

          Sec. 2.02  ACCOUNT ADJUSTMENTS.
                     ------------------- 

          (a) In the event a dividend is declared with respect to the Common
Stock, a Participant's Account shall be credited with additional Profit Shares
(rounded to the nearest one-one hundredth of a share) equal to the amount of the
aggregate cash dividend that would have been distributed on shares represented
by the Profit Shares then credited to a Participant's Account, divided by the
then current per share Fair Market Value of the Common Stock, unless the
Participant has made an irrevocable election on a Deferral Election Form to
receive instead an amount equal to such cash dividends at the time such
dividends become payable.

          (b) Unless otherwise determined by the Plan Administrator, in the
event of a stock split, stock dividend, reclassification, reorganization or
other capital adjustment in the shares of Common Stock, the number of Profit
Shares then credited to the Participant's Account shall be adjusted in the same
manner as the shares of the Common Stock are adjusted.


                                      94
<PAGE>
 
                                   ARTICLE 3


                         DISTRIBUTIONS TO PARTICIPANTS
                         -----------------------------
 

          Sec. 3.01  DISTRIBUTION UPON TERMINATION FROM EMPLOYMENT OR AFTER A
                     --------------------------------------------------------
FIXED PERIOD OF TIME.  A Participant shall irrevocably elect on the Deferral
- ---------------------                                                       
Election Form to receive a number of shares of Common Stock equal to the number
of  Profit Shares credited to his or her Account, as a result of a deferral
election made pursuant to Section 2.01 or an adjustment in his or her Account
pursuant to the terms of the Plan, upon:

     (a)  the Participant's Cessation of Services;

     (b)  a specified date or the expiration of a specified number of years
          after the date of exercise of the option from which the Profit Shares
          are derived; provided that in no event may such specified date be less
          than, or deferral period end before, three (3) years from the date of
          exercise of the option from which such Profit Shares are derived;

     (c)  the earlier of (a) or (b); or

     (d)  the later of (a) or (b).

A Participant shall receive the entire number of shares of Common Stock to which
he or she is entitled in a single distribution at the time determined above,
unless the Participant has made an irrevocable election on the Deferral Election
Form or supplement thereto, at least thirteen (13) months in advance of the
distribution date determined above, to receive such shares instead in
substantially equal annual installments over a period of not more than five (5)
years from the distribution date determined above.

          Sec. 3.02  WITHDRAWALS ON ACCOUNT OF HARDSHIP.  Prior to the date a
                     ----------------------------------                      
Participant becomes entitled to a distribution under Section 3.01, the
Participant may request, and the Plan Administrator, in its sole and absolute
discretion, may approve, a withdrawal of all or a portion of the Profit Shares
credited to the Participant's Account on account of a Hardship. The Plan
Administrator may request the Participant to provide such information as it
deems necessary and proper for it to determine the existence of a Hardship. The
Plan Administrator shall review the Participant's request and determine the
extent, if any, to which such request is justified. It is intended that the Plan
Administrator's determination as to whether a Participant has suffered a
Hardship shall be made consistent with the requirements for an "unforeseeable
emergency," within the meaning of section 457(d) of the Code. Any such
withdrawal shall be limited to an amount reasonably necessary to meet the
Hardship.


                                      95
<PAGE>
 
          Sec. 3.03  WITHDRAWALS WITH PENALTY.  Prior to the date a Participant
                     ------------------------                                  
becomes entitled to a distribution under Section 3.01, the Participant may
request and the Plan Administrator, in its sole and absolute discretion, may
approve, a withdrawal of all or a portion of the Profit Shares credited to the
Participant's Account.  In the event of a withdrawal pursuant to this Section
3.03, the Participant shall forfeit from his or her Account a number (rounded up
to the next whole number) of Profit Shares equal to ten (10%) percent of the
number of Profit Shares withdrawn.  The forfeited Profit Shares shall be
deducted from the Participant's Account prior to giving effect to the requested
withdrawal, and neither the Participant, nor his or her Beneficiary or any other
person claiming an interest in the Participant's Account shall have any right or
claim to the forfeited amount.

          Sec. 3.04  ACCELERATION OF PAYMENTS.
                     ------------------------ 

     (a) In the event of the liquidation, dissolution or winding up of the
Company or the distribution or sale of all or substantially all of the Company's
assets and property, the Company shall immediately distribute to the Participant
shares of Common Stock equal to the number of  Profit Shares then credited to
the Participant's Account.

     (b) In the event the Plan Administrator determines, based on a change in
the applicable tax laws, a published ruling or similar announcement issued by
the Internal Revenue Service, a regulation issued by the Secretary of the
Treasury or his or her delegate, a decision by a court of competent jurisdiction
involving a Participant, or a closing agreement involving a Participant made
under section 7121 of the Code that is approved by the Commissioner, that a
Participant has recognized or will recognize income for Federal income tax
purposes with respect to any amounts that are or will be payable to the
Participant under this Article 3 before they otherwise would be paid to the
Participant, upon the request of the Participant, the Plan Administrator shall
immediately distribute to the Participant shares of Common Stock equal to the
number of Profit Shares with a Fair Market Value at the time of such
distribution equal to the amount of income so recognized.

     (c) The Company reserves the right, in its sole discretion, upon
termination of the Plan or at any other time to accelerate payments hereunder by
distributing to Participants' shares of Common Stock equal to the number of
Profit Shares then credited to the Participants' Accounts in full satisfaction
of its obligations hereunder.


                                      96
<PAGE>
 
                                   ARTICLE 4


                                DEATH BENEFITS
                                --------------
 

          Sec. 4.01  DISTRIBUTION OF BENEFITS UPON DEATH OF PARTICIPANT.  In the
                     --------------------------------------------------         
event of a Participant's death prior to the complete distribution of his or her
Account pursuant to Article 3, shares of Common Stock equal to the number of
Profit Shares remaining in the Participant's Account shall be distributed to the
Participant's Beneficiary in a single distribution as soon as administratively
practicable following the Participant's death.

          Sec. 4.02  DESIGNATION OF BENEFICIARY.  For purposes of Section 4.01,
                     --------------------------                                
the Participant's Beneficiary shall be the person or persons so designated by
the Participant in a written instrument submitted to the Plan Administrator.  In
the event the Participant fails to properly designate a Beneficiary, his or her
Beneficiary shall be the Participant's surviving spouse or, if none, his or her
estate.



                                   ARTICLE 5


                                    VESTING
                                    -------


          Sec. 5.01  FULL VESTING OF BENEFITS.   A Participant, at all times,
                     ------------------------                                
shall have a fully (100%) vested interest in his or her Account.



                                   ARTICLE 6


                        NATURE OF COMPANY'S OBLIGATION
                        ------------------------------
 

          Sec. 6.01  FUNDING OF BENEFITS.  In any event, the obligation of the
                     -------------------                                      
Company hereunder shall constitute a general, unsecured obligation, payable
solely out of general assets of the Company, and anything contained herein to
the contrary notwithstanding, until delivery of Common Stock is made to the
Participant or the Participant's Beneficiary hereunder, neither the Participant,
nor the Participant's Beneficiary or any other person claiming an interest
hereunder shall have any right to, or property interest in, any Common Stock or
other specific assets of the Company.

          Sec.  6.02  NO RIGHTS AS SHAREHOLDER.  Until delivery of Common Stock
                      ------------------------                                 
is made to the Participant or the Participant's Beneficiary hereunder, no
Participant, Participant's Beneficiary or any other person claiming an interest
hereunder shall have any rights as a shareholder of the Company, including the
right to any cash dividends (except as provided in Section 2.01) or the right to
vote, with respect to any Common Stock or the Profit Shares credited to the
Participant's Account hereunder.


                                      97
<PAGE>
 
                                   ARTICLE 7



                                ADMINISTRATION
                                --------------
 

          Sec. 7.01  PLAN ADMINISTRATOR.  The individual or committee designated
                     ------------------                                         
by the Board as the Plan Administrator of the Plan shall be the administrator of
the Plan for purposes of the Employee Retirement Income Security Act of 1974
(ERISA), as amended from time to time.  However, if such position is vacant, the
Company shall be the Plan Administrator.

          Sec. 7.02  DUTIES AND POWERS OF PLAN ADMINISTRATOR.  The Plan
                     ---------------------------------------           
Administrator shall have full discretionary power and authority to construe,
interpret and administer this Plan and may, to the extent permitted by law, make
factual determinations, correct defects, supply omissions and reconcile
inconsistencies to the extent necessary to effectuate the Plan and, subject to
Section 7.03, the Plan Administrator's actions in doing so shall be final and
binding on all persons interested in the Plan.  The Plan Administrator may from
time to time adopt rules and regulations governing the operation of this Plan
and may employ and rely on such legal counsel, such actuaries, such accountants
and such agents as it may deem advisable to assist in the administration of the
Plan.

          Sec. 7.03  CLAIMS PROCEDURE.
                     ---------------- 

          (a) The Company will advise each Participant and Beneficiary of any
benefits to which he or she is entitled under the Plan.  If any person believes
that the Company has failed to advise him or her of any benefit to which he or
she is entitled, he or she may file a written claim with the Plan Administrator.
The claim shall be reviewed, and a response provided, within a reasonable time
after receiving the claim.  Any claimant who is denied a claim for benefits
shall be provided with written notice setting forth:

               (1) the specific reasons or reasons for the denial;

               (2) specific reference to pertinent Plan provisions on which
denial is based;

               (3) a description of any additional material or information
necessary for the claimant to perfect the claim; and

               (4) an explanation of the claim review procedure set forth in
paragraph (b), below.


                                      98
<PAGE>
 
          (b) Within 60 days of receipt by a claimant of a notice denying a
claim under the Plan under paragraph (a), the claimant or his or her duly
authorized representative may request in writing a full and fair review of the
claim by the Plan Administrator or a claims committee appointed by the Plan
Administrator (hereinafter the "Committee").  The Committee may extend the 60-
day period where the nature of the benefit involved or other attendant
circumstances make such extension appropriate.  In connection with such review,
the claimant or his or her duly authorized representative may review pertinent
documents and may submit issues and comments in writing.  The Committee shall
make a decision promptly, and not later than 60 days after the Committee's
receipt of a request for review, unless special circumstances (such as the need
to hold a hearing, if the Committee deems one necessary) require an extension of
time for processing, in which case a decision shall be rendered as soon as
possible, but not later than 120 days after receipt of a request for review.
The decision on review shall be in writing and shall include specific reasons
for the decision, written in a manner calculated to be understood by the
claimant, and specific references to the pertinent Plan provisions on which the
decision is based.



                                   ARTICLE 8



                           AMENDMENT AND TERMINATION
                           -------------------------
 

          Sec. 8.01  AUTHORITY TO AMEND.  The Board or its designee may amend
                     ------------------                                      
the Plan at any time in any manner whatsoever.  Notwithstanding the above, no
amendment shall operate to reduce the benefit amount accrued on behalf of a
Participant on the effective date of the amendment.

          Sec. 8.02  RIGHT TO TERMINATE.  Continuance of the Plan is completely
                     ------------------                                        
voluntary and is not assumed as a contractual obligation of the Company.  The
Company shall have the right at any time for any reason to terminate the Plan,
by action of the Board; provided, however, that the Plan termination shall not
operate to reduce the amount accrued on behalf of a Participant on the effective
date of the Plan's termination.



                                   ARTICLE 9


                                 MISCELLANEOUS
                                 -------------
 

          Sec. 9.01  NO RIGHT TO CONTINUED DIRECTORSHIP.  Nothing contained
                     ----------------------------------                    
herein (a) shall be deemed to exclude a Participant from any compensation or
other benefit to which he or she otherwise is or might become entitled to as a
Non-Employee Director or (b) shall be construed as conferring upon a Non-
Employee Director the right to continue as a member of the Board.

          Sec. 9.02  NO COMPENSATION FOR OTHER BENEFITS.  Except as provided
                     ----------------------------------                     
herein, any amounts paid hereunder shall not be deemed compensation to a
Participant for the purposes of computing benefits to which he or she may be
entitled under any other arrangement established by the Company for the benefit
of its Non-Employee Directors.


                                      99
<PAGE>
 
          Sec. 9.03  RIGHTS AND OBLIGATIONS.  The rights and obligations created
                     ----------------------                                     
hereunder shall be binding on a Participant's heirs, executors and
administrators and on the successors and assigns of the Company.

          Sec. 9.04  PAYMENTS TO REPRESENTATIVES.  If any Participant or
                     ---------------------------                        
Beneficiary entitled to receive any benefits hereunder is determined by the Plan
Administrator, or is adjudged to be, legally incapable of giving valid receipt
and discharge for such benefits, the benefits shall be paid to a duly appointed
and acting conservator or guardian, or other legal representative of such
Participant or Beneficiary, if any, and if no such legal representative is
appointed and acting, to such person or persons as the Plan Administrator may
designate.  Such payments shall, to the extent made, be deemed a complete
discharge for such payments under this Plan.

          Sec. 9.05  NO FRACTIONAL SHARES.  No fractional shares of Common Stock
                     --------------------                                       
shall be issued or delivered pursuant to the Plan.  The Plan Administrator shall
determine whether cash shall be paid in lieu of such fractional shares or
whether such fractional shares or any rights thereto shall be forfeited or
otherwise eliminated.

          Sec. 9.06  NONALIENATION.  Except as hereinafter provided with respect
                     -------------                                              
to family disputes, the rights of any Participant under this Plan are personal
and may not be assigned, transferred, pledged or encumbered.  Any attempt to do
so shall be void.  In cases of family disputes, the Company will observe the
terms of the Plan unless and until ordered to do otherwise by a state or Federal
court.  As a condition of participation, a Participant agrees to hold the
Company harmless from any claim that arises out of the Company's obeying the
final order of any state or Federal court, whether such order effects a judgment
of such court or is issued to enforce a judgment or order of another court.  For
purposes of this Section 9.06, "family dispute" means a dispute relating to
provision of child support, alimony payments, or marital property rights to a
spouse, former spouse or other dependent of the Participant.

          Sec. 9.07  LIMITATIONS ON OBLIGATIONS.  Neither the Company nor any
                     --------------------------                              
member of the Board shall be responsible or liable in any manner to any
Participant, Beneficiary or any person claiming through them for any benefit or
action taken or omitted in connection with the granting of benefits, the
continuation of benefits, or the interpretation and administration of this Plan.

          Sec. 9.08  WITHHOLDING.  If the Company is required to withhold
                     -----------                                         
amounts under applicable federal, state or local tax laws, rules or regulations,
the Company shall be entitled to deduct and withhold such amounts from any
payment made pursuant to this Plan.

          Sec. 9.09  LOST PAYEES.  Any benefit payable under the Plan shall be
                     -----------                                              
deemed forfeited if the Plan Administrator is unable to locate the Participant
or Beneficiary to whom payment is due; provided, however, that such benefit
shall be reinstated if a claim is made by the Participant or Beneficiary for the
forfeited benefit.

          Sec. 9.10  GOVERNING LAW.  The Plan shall be construed in accordance
                     -------------                                            
with and governed by the laws of the Commonwealth of Pennsylvania.


                                      100

<PAGE>
 
                                                                EXHIBIT 10.14.12

                        THIRTEEN MODIFICATION AGREEMENT
                        -------------------------------

     THIS AGREEMENT is made as of the 30th day of May, 1997, between SEI 
CORPORATION, a Pennsylvania corporation ("Company") and PNC BANK, NATIONAL 
ASSOCIATION, successor by merger to Provident National Bank ("Bank").

                                  BACKGROUND
                                  ----------

     Bank and Company have entered into a Credit Agreement effective as of May 
31, 1992 as amended by a Waiver and First Modification Agreement between Bank
and Company dated as of September 30, 1992, a Second Modification Agreement
between Bank and Company dated as of April 19, 1993, a Third Modification
Agreement between Bank and Company dated as of May 31, 1993, a Fourth
Modification Agreement between Bank and Company dated as of March 14, 1994, a
Fifth Modification Agreement dated as of May 31, 1994, a Sixth Modification
Agreement dated as of May 5, 1995, a Seventh Modification Agreement effective as
of May 31, 1995, an Eighth Modification Agreement dated October 19, 1995, a
Ninth Modification Agreement dated March 31, 1996, a Tenth Modification
Agreement dated as of May 31, 1996, an Eleventh Modification Agreement dated
October 1, 1996 and a Release and Modification Agreement dated February 20, 1997
(as so amended, the "Credit Agreement") pursuant to which Bank agreed to make up
to $50,000,000 in loans (the "Loans") to Company. Capitalized terms used herein
and not otherwise defined shall have the meanings ascribed to them in the Credit
Agreement. The Loans currently are evidenced by Company's restated note dated
October 1, 1996 (the "Note") in the principal amount of $50,000,000.

     Company and Bank desire to extend the Termination Date as contemplated by 
the Credit Agreement.

                                   Agreement
                                   ---------

     NOW, THEREFORE, intending to be legally bound hereby, the parties hereto 
agree as follows:

     1. Terms. Capitalized terms not defined herein shall have the meanings set 
        -----
forth in the Credit Agreement.

     2. Amendment to Credit Agreement. The Credit Agreement is hereby amended as
        -----------------------------
follows:

        (a) As contemplated by Section 9.15 of the Credit Agreement, the 
Termination Date and the date on which the Credit Commitment shall expire and 
the Credit Period shall end is hereby changed from May 31, 1997 to May 31, 1998,
effective June 1, 1997.

     3. Loan Documents. All references in the Restated Note and the Credit 
        --------------
Agreement to the Credit Agreement are hereby deemed to be to the Credit 
Agreement, as amended hereby.

     4. Representations and Warranties. Company represents and warrants that:
        ------------------------------

        (a) Company is a corporation duly organized, validly existing and in 
good standing under the laws of the Commonwealth of Pennsylvania and has all 
requisite power and authority to make and perform this Agreement.

        (b) The execution, delivery and performance of this Agreement have been 
duly authorized by all requisite corporate action of Company and will not 
violate any applicable provision of law or judgment, order or regulation of any 
court or of any public or governmental agency or authority nor conflict with or 
constitute a breach of or a default under any instrument to which Company is a 
party or by which Company or any of the Company's properties is bound;

       (c) This Agreement constitutes the legal, valid and binding obligation of
Company, enforceable in accordance with its terms, except as the same may be 
limited by applicable bankruptcy, insolvency, reorganization, moratorium or 
other similar laws affecting creditor's rights generally and general principles 
of equity;




                                      101

<PAGE>
 
        (d) No approval, consent or authorization of, or registration, 
declaration or filing with, any governmental or public body or authority is
required in connection with the valid execution, delivery and performance by
Company of this Agreement, except such as have been obtained; and

        (e) All representations and warranties of Company set forth in Section 5
of the Credit Agreement are true and correct as of the date hereof.

     All of the above representations and warranties shall survive the making of
this Agreement.

     5. Company's Ratification. Except as hereinabove modified and amended and 
        ----------------------
except as necessary to conform to the intention of the parties hereinabove set
forth, the Credit Agreement and the Restated Note shall remain unchanged and in
full force and effect and are hereby ratified and confirmed in all respects, as
so amended.

     6. Miscellaneous.
        -------------

        (a) This Agreement shall be governed by and construed in accordance with
the laws of the Commonwealth of Pennsylvania.

        (b) This Agreement shall inure to the benefit of, and be binding upon, 
the parties hereto and their respective successors and assigns.

        (c) This Agreement may be executed in counterparts, each of which shall 
be deemed an original, and all of which, when taken together, shall constitute 
one and the same instrument.

     IN WITNESS WHEREOF, the parties hereto have executed this Agreement as of 
the date and year first above written.

                                    SEI CORPORATION

                                    By:  /s/ Henry H. Greer
                                         ---------------------------------------
                                    Title: President and Chief Operating Officer
                                           -------------------------------------

                                    PNC BANK, NATIONAL ASSOCIATION

                                    By: /s/ Warren C. Engle
                                        ----------------------------------------
                                    Title: Vice President
                                           -------------------------------------


                                      102

<PAGE>
 
                                                                EXHIBIT 10.14.13



                       FOURTEENTH MODIFICATION AGREEMENT
                       ---------------------------------

        THIS AGREEMENT is made as of the 31st day of December, 1997, by and 
among PNC BANK, NATIONAL ASSOCIATION, successor by merger to Provident National
Bank, a national banking association with offices at 1600 Market Street,
Philadelphia 19103 (the "Bank"), and SEI INVESTMENTS COMPANY (formerly SEI
Corporation), a Pennsylvania corporation (the "Borrower").

                                  BACKGROUND
                                  ----------

        Bank and Borrower have entered into a Credit Agreement effective as of
May 31, 1992 as amended by a Waiver and First Modification Agreement between
Bank and Borrower dated as of September 30, 1992, a Second Modification
Agreement between Bank and Borrower dated as of April 19, 1993, a Third
Modification Agreement between Bank and Borrower dated as of May 31, 1993, a
Fourth Modification Agreement between Bank and Borrower dated as of March 14,
1994, a Fifth Modification Agreement dated as of May 31, 1994, a Sixth
Modification Agreement dated as of May 5, 1995, a Seventh Modification Agreement
effective as of May 31, 1995, an Eighth Modification Agreement dated October 19,
1995, a Ninth Modification Agreement dated March 31, 1996 a Tenth Modification
Agreement dated as of May 31, 1996, an Eleventh Modification Agreement dated
October 1, 1996, a Release and Modification Agreement dated February 20, 1997
and a Thirteenth Modification Agreement dated May 30, 1997 (as so amended, the
"Credit Agreement") pursuant to which Bank agreed to make up to $50,000,000 in
loans (the "Loans") to Borrower. Capitalized terms used herein and not otherwise
defined shall have the meanings ascribed to them in the Credit Agreement. The
Loans are evidenced by Borrower's note originally dated May 31, 1992 and amended
and restated September 30, 1992, May 31, 1996 and October 1, 1996 (the "Note")
in the principal amount of $50,000,000.

        Borrower and Bank have agreed to certain amendments to the Credit 
Agreement, upon the terms and conditions set forth herein.

        NOW, THEREFORE, the parties hereto, intending to be legally bound 
hereby, agree as follows:

                                   AGREEMENT
                                   ---------

        1.   Terms. Capitalized terms used herein and not otherwise denied 
             -----
herein shall have the meanings given to such terms in the Credit Agreement.

        2.   Amendment to Credit Agreement. The Credit Agreement is hereby 
             -----------------------------
amended by amending and restating Section 7.10(g) thereof to read in full as 
follows:
             "(g) Purchased by the Company of its common stock (to be retired by
             the Company) of up to an aggregate consideration of $250,000,000
             (cumulatively since the institution of its stock repurchase
             program), less the consideration paid by the Company for the
             purchase of its common stock as of the date hereof;"

        3.   Loan Documents. Except where the context clearly requires
             --------------
otherwise, all references to the Credit Agreement in the Note or any other
document delivered to Bank in connection therewith shall be to the Credit
Agreement as amended by this Agreement.

        4.   Borrower's Ratification. Borrower agrees that it has no defenses or
             -----------------------
set-offs against the Bank, its officers, directors, employees, agents or
attorneys with respect to the Note or the Credit Agreement, all of which are in
full force and effect and shall remain in full force and effect unless and until
modified or amended in writing in accordance with their terms. Borrower hereby
ratifies and confirms its obligations under the Note and the Credit Agreement
and agrees that the execution and the delivery of this Agreement does not in any
way diminish or invalidate any of its obligations thereunder.

        5.   Representations and Warranties. Borrower hereby certifies that:
             ------------------------------

             (a) except as otherwise previously disclosed to Bank in any manner 
whatsoever, the representations and warranties made in the Credit Agreement are 
true and correct as of the date hereof.

             (b) no Event of Default under the Note or the Credit Agreement and
no event which with the passage of time or the giving of notice or both could
become an Event of Default, exists on the date hereof; and



                                      103
<PAGE>
 
             (c) this Agreement has been duly authorized, executed and delivered
so as to constitute the legal, valid and binding obligation of Borrower,
enforceable in accordance with its terms.

        All of the above representations and warranties shall survive the making
of this Agreement.

        6.   No Waiver. This Agreement does not and shall not be deemed to 
             ---------
constitute a waiver by Bank of any Event of Default under the Note or Credit 
Agreement, or of any event which with the passage of time or the giving of 
notice or both would constitute an Event of Default, nor does it obligate Bank 
to agree to any further modifications of the terms of the Credit Agreement or 
constitute a waiver of any of Bank's other rights or remedies.

        7.   Miscellaneous.
             -------------

             (a) All terms, conditions, provisions and covenants in the Note,
the Credit Agreement, and all other documents delivered to Bank in connection
therewith shall remain unaltered and in full force and effect except as modified
or amended hereby. To the extent that any term or provision of this Agreement is
or may be deemed expressly inconsistent with any term or provision in the Credit
Agreement, the Note or any other document executed in connection therewith, the
terms and provisions hereof shall control.

             (b) This Agreement shall be governed by and construed according to 
the laws of the Commonwealth of Pennsylvania.

             (c) This Agreement shall inure to the benefit of, and be binding
upon, the parties hereto and their respective successors and assigns and may be
executed in one or more counterparts, each of which shall be deemed an original,
but all of which together shall constitute one and the same instrument.

        IN WITNESS WHEREOF, the parties hereto have executed this Agreement as 
of the day and year first above written.

                                    BORROWER        
                                    --------

[SEAL]                          SEI INVESTMENTS COMPANY
                                    (formerly SEI Corporation)


Attest: /s/ Sandra M. Orlow         By: /s/ Henry H. Greer
       --------------------         ----------------------

Title: Vice President               Title: President and Chief Operating Officer
      ---------------               --------------------------------------------


                                    BANK
                                    ----

                                    PNC BANK, NATIONAL ASSOCIATION


                                    By: /s/ Warren C. Engle
                                    -----------------------

                                    Title: Vice President
                                    -----------------------


                                      104

<PAGE>
 
                                                                      EXHIBIT 21

                        SUBSIDIARIES OF THE REGISTRANT
                        ------------------------------

                                                JURISDICTION OF ORGANIZATION
         NAME                                         OR INCORPORATION
         ----                                         ----------------
SEI Investments Distribution Company                     Pennsylvania
SEI Investments Management Corporation                   Delaware
SEI, Inc.                                                Canada (Federal)
SEI Capital Limited                                      Canada (Federal)
Rembrandt Financial Services Company                     Pennsylvania
SEI Developments, Inc.                                   Delaware
SEI Fund Resources                                       Delaware
SEI Fund Management                                      Delaware
SEI Trust Company                                        Pennsylvania
SEI Funds, Inc.                                          Delaware
SEI Investments, Inc.                                    Delaware
SEI Global Investments Corporation                       Delaware
SEI Capital AG                                           Switzerland
Primus Capital Advisors Company                          Canada (Federal)
SEI Advanced Capital Management, Inc.                    Delaware
SEI Global Capital Investments, Inc.                     Delaware
SEI Global Management (Cayman) Inc.                      Cayman Islands, B.W.I.
SEI Global Asset Management Limited                      Ireland
Fund Resources International Limited                     Ireland
SEI Investments Argentina, S.A.                          Argentina
SEI Global Holdings (Cayman) Inc.                        Cayman Islands, B.W.I.
Latinvest Sociedad de Bolsa, S.A.                        Argentina
Quadrum, S.A.                                            Argentina


                                      105

<PAGE>
 
                                                                      EXHIBIT 23

                   CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS

To SEI Investments Company:

As independent public accountants, we hereby consent to the incorporation of our
report, included in this Form 10-K, into the Company's previously filed
Registration Statements File No. 2-73997, File No. 2-75629, File No. 2-78133,
File No. 2-80841, File No. 2-89659, File No. 33-19952, File No. 33-24595, File
No. 33-41602 and File No. 333-41343.

                                                             ARTHUR ANDERSEN LLP

Philadelphia, Pa.,
 March 27, 1998




                                      106

<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM CONSOLIDATED
BALANCE SHEETS AND CONSOLIDATED STATEMENTS OF OPERATIONS AND IS QUALIFIED IN ITS
ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-START>                             JAN-01-1997 
<PERIOD-END>                               DEC-31-1997
<CASH>                                          16,891
<SECURITIES>                                       876
<RECEIVABLES>                                   32,392
<ALLOWANCES>                                   (1,200)
<INVENTORY>                                          0
<CURRENT-ASSETS>                                83,995
<PP&E>                                         101,264
<DEPRECIATION>                                (49,493)
<TOTAL-ASSETS>                                 168,884
<CURRENT-LIABILITIES>                           81,676
<BONDS>                                         33,000
                                0
                                          0
<COMMON>                                           178
<OTHER-SE>                                      46,232
<TOTAL-LIABILITY-AND-EQUITY>                   168,884
<SALES>                                              0
<TOTAL-REVENUES>                               292,749
<CGS>                                                0
<TOTAL-COSTS>                                  233,306
<OTHER-EXPENSES>                                13,931
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                             (2,488)
<INCOME-PRETAX>                                 44,007
<INCOME-TAX>                                    17,163
<INCOME-CONTINUING>                             26,844
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    26,844
<EPS-PRIMARY>                                     1.47
<EPS-DILUTED>                                     1.40
        

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<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM CONSOLIDATED
BALANCE SHEETS AND CONSOLIDATED STATEMENTS OF OPERATIONS AND IS QUALIFIED IN ITS
ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<RESTATED>
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          DEC-31-1996
<PERIOD-START>                             JAN-01-1996 
<PERIOD-END>                               DEC-31-1996
<CASH>                                               0
<SECURITIES>                                     1,000
<RECEIVABLES>                                        0
<ALLOWANCES>                                         0 
<INVENTORY>                                          0
<CURRENT-ASSETS>                                     0
<PP&E>                                               0
<DEPRECIATION>                                       0
<TOTAL-ASSETS>                                       0
<CURRENT-LIABILITIES>                                0
<BONDS>                                              0
                                0
                                          0
<COMMON>                                             0
<OTHER-SE>                                           0
<TOTAL-LIABILITY-AND-EQUITY>                         0
<SALES>                                              0
<TOTAL-REVENUES>                                     0 
<CGS>                                                0
<TOTAL-COSTS>                                        0
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                   0
<INCOME-PRETAX>                                      0
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                                  0
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                         0
<EPS-PRIMARY>                                      .37
<EPS-DILUTED>                                      .35
        


</TABLE>

<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM CONSOLIDATED
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FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER>    1,000
<RESTATED> 
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          DEC-31-1995
<PERIOD-START>                             JAN-01-1995
<PERIOD-END>                               DEC-31-1995
<CASH>                                               0
<SECURITIES>                                         0
<RECEIVABLES>                                        0
<ALLOWANCES>                                         0
<INVENTORY>                                          0
<CURRENT-ASSETS>                                     0
<PP&E>                                               0
<DEPRECIATION>                                       0
<TOTAL-ASSETS>                                       0
<CURRENT-LIABILITIES>                                0
<BONDS>                                              0
                                0
                                          0
<COMMON>                                             0
<OTHER-SE>                                           0
<TOTAL-LIABILITY-AND-EQUITY>                         0
<SALES>                                              0
<TOTAL-REVENUES>                                     0
<CGS>                                                0
<TOTAL-COSTS>                                        0
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                   0
<INCOME-PRETAX>                                      0
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                                  0
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                         0
<EPS-PRIMARY>                                     1.03
<EPS-DILUTED>                                      .98
        

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<TABLE> <S> <C>

<PAGE>
<ARTICLE>  5 
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM CONSOLIDATED
STATEMENTS OF INCOME AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH
FINANCIAL STATEMENTS.
</LEGEND>
<RESTATED>
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                    3-MOS
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-START>                             JAN-01-1997 
<PERIOD-END>                               MAR-31-1997
<CASH>                                               0
<SECURITIES>                                         0
<RECEIVABLES>                                        0
<ALLOWANCES>                                         0
<INVENTORY>                                          0
<CURRENT-ASSETS>                                     0
<PP&E>                                               0
<DEPRECIATION>                                       0
<TOTAL-ASSETS>                                       0
<CURRENT-LIABILITIES>                                0
<BONDS>                                              0
                                0
                                          0
<COMMON>                                             0
<OTHER-SE>                                           0
<TOTAL-LIABILITY-AND-EQUITY>                         0
<SALES>                                              0
<TOTAL-REVENUES>                                     0
<CGS>                                                0
<TOTAL-COSTS>                                        0
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                   0
<INCOME-PRETAX>                                      0
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                                  0
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                         0
<EPS-PRIMARY>                                      .26
<EPS-DILUTED>                                      .25
        


</TABLE>

<TABLE> <S> <C>

<PAGE>
<ARTICLE>  5 
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM CONSOLIDATED
STATEMENTS OF INCOME AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH
FINANCIAL STATEMENTS.
</LEGEND>
<RESTATED>
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                    6-MOS
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-START>                             JAN-01-1997 
<PERIOD-END>                               JUN-30-1997
<CASH>                                               0
<SECURITIES>                                         0
<RECEIVABLES>                                        0
<ALLOWANCES>                                         0
<INVENTORY>                                          0
<CURRENT-ASSETS>                                     0
<PP&E>                                               0
<DEPRECIATION>                                       0
<TOTAL-ASSETS>                                       0
<CURRENT-LIABILITIES>                                0
<BONDS>                                              0
                                0
                                          0
<COMMON>                                             0
<OTHER-SE>                                           0
<TOTAL-LIABILITY-AND-EQUITY>                         0
<SALES>                                              0
<TOTAL-REVENUES>                                     0
<CGS>                                                0
<TOTAL-COSTS>                                        0
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                   0
<INCOME-PRETAX>                                      0
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                                  0
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                         0
<EPS-PRIMARY>                                      .54
<EPS-DILUTED>                                      .52
        


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<TABLE> <S> <C>

<PAGE>
<ARTICLE>  5 
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM CONSOLIDATED
STATEMENTS OF INCOME AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH
FINANCIAL STATEMENTS.
</LEGEND>
<RESTATED>
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                    9-MOS
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-START>                             JAN-01-1997 
<PERIOD-END>                               SEP-30-1997
<CASH>                                               0
<SECURITIES>                                         0
<RECEIVABLES>                                        0
<ALLOWANCES>                                         0
<INVENTORY>                                          0
<CURRENT-ASSETS>                                     0
<PP&E>                                               0
<DEPRECIATION>                                       0
<TOTAL-ASSETS>                                       0
<CURRENT-LIABILITIES>                                0
<BONDS>                                              0
                                0
                                          0
<COMMON>                                             0
<OTHER-SE>                                           0
<TOTAL-LIABILITY-AND-EQUITY>                         0
<SALES>                                              0
<TOTAL-REVENUES>                                     0
<CGS>                                                0
<TOTAL-COSTS>                                        0
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                   0
<INCOME-PRETAX>                                      0
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                                  0
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                         0
<EPS-PRIMARY>                                      .92
<EPS-DILUTED>                                      .88
        



</TABLE>

<TABLE> <S> <C>

<PAGE>
 
<ARTICLE>  5 
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM CONSOLIDATED
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FINANCIAL STATEMENTS.
</LEGEND>
<RESTATED>
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                    3-MOS
<FISCAL-YEAR-END>                          DEC-31-1996
<PERIOD-START>                             JAN-01-1996 
<PERIOD-END>                               MAR-31-1996
<CASH>                                               0
<SECURITIES>                                         0
<RECEIVABLES>                                        0
<ALLOWANCES>                                         0
<INVENTORY>                                          0
<CURRENT-ASSETS>                                     0
<PP&E>                                               0
<DEPRECIATION>                                       0
<TOTAL-ASSETS>                                       0
<CURRENT-LIABILITIES>                                0
<BONDS>                                              0
                                0
                                          0
<COMMON>                                             0
<OTHER-SE>                                           0
<TOTAL-LIABILITY-AND-EQUITY>                         0
<SALES>                                              0
<TOTAL-REVENUES>                                     0
<CGS>                                                0
<TOTAL-COSTS>                                        0
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                   0
<INCOME-PRETAX>                                      0
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                                  0
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                         0
<EPS-PRIMARY>                                      .31
<EPS-DILUTED>                                      .30
        




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<TABLE> <S> <C>

<PAGE>
 
<ARTICLE>  5 
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM CONSOLIDATED
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FINANCIAL STATEMENTS.
</LEGEND>
<RESTATED>
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                    6-MOS
<FISCAL-YEAR-END>                          DEC-31-1996
<PERIOD-START>                             JAN-01-1996 
<PERIOD-END>                               JUN-30-1996
<CASH>                                               0
<SECURITIES>                                         0
<RECEIVABLES>                                        0
<ALLOWANCES>                                         0
<INVENTORY>                                          0
<CURRENT-ASSETS>                                     0
<PP&E>                                               0
<DEPRECIATION>                                       0
<TOTAL-ASSETS>                                       0
<CURRENT-LIABILITIES>                                0
<BONDS>                                              0
                                0
                                          0
<COMMON>                                             0
<OTHER-SE>                                           0
<TOTAL-LIABILITY-AND-EQUITY>                         0
<SALES>                                              0
<TOTAL-REVENUES>                                     0
<CGS>                                                0
<TOTAL-COSTS>                                        0
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                   0
<INCOME-PRETAX>                                      0
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                                  0
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                         0
<EPS-PRIMARY>                                      .57
<EPS-DILUTED>                                      .55
        



</TABLE>

<TABLE> <S> <C>

<PAGE>
<ARTICLE>  5 
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM CONSOLIDATED
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FINANCIAL STATEMENTS.
</LEGEND>
<RESTATED>
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                    9-MOS
<FISCAL-YEAR-END>                          DEC-31-1996
<PERIOD-START>                             JAN-01-1996 
<PERIOD-END>                               SEP-30-1996
<CASH>                                               0
<SECURITIES>                                         0
<RECEIVABLES>                                        0
<ALLOWANCES>                                         0
<INVENTORY>                                          0
<CURRENT-ASSETS>                                     0
<PP&E>                                               0
<DEPRECIATION>                                       0
<TOTAL-ASSETS>                                       0
<CURRENT-LIABILITIES>                                0
<BONDS>                                              0
                                0
                                          0
<COMMON>                                             0
<OTHER-SE>                                           0
<TOTAL-LIABILITY-AND-EQUITY>                         0
<SALES>                                              0
<TOTAL-REVENUES>                                     0
<CGS>                                                0
<TOTAL-COSTS>                                        0
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                   0
<INCOME-PRETAX>                                      0
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                                  0
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                         0
<EPS-PRIMARY>                                      .89
<EPS-DILUTED>                                      .86
        




</TABLE>

<PAGE>
 
                                                                      EXHIBIT 99

The undertaking set forth below is filed for purposes of incorporation by 
reference into Part II of the registration statements on Form S-8, File No. 
2-73997, File No. 2-75629, File No. 2-78133, File No. 2-80841, File No. 2-89659,
File No. 33-19952, File No. 33-24595, File No. 33-41602, and File No. 333-41343.

Item 9. Undertakings.
- --------------------

   (a)  The undersigned registrant hereby undertakes:

        Insofar as indemnification for liabilities arising under the Securities 
        Act of 1933 (the "Securities Act") may be permitted to directors,
        officers or persons controlling the registrant pursuant to the
        provisions described in this registration statement, or otherwise, SEI
        Investments Company (the "Company") has been advised that in the opinion
        of the Commission such indemnification is against public policy as
        expressed in the Securities Act and is therefore unenforceable. In the
        event that a claim for indemnification against such liabilities (other
        than the payment by the Company of expenses incurred or paid by a
        director, officer or controlling person of the Company in the successful
        defense of any action, suit or proceeding) is asserted by such director,
        officer or controlling person in connection with the securities being
        registered, the Company will, unless in the opinion of its counsel the
        matter has been settled by controlling precedent, submit to a court of
        appropriate jurisdiction the question whether such indemnification by it
        is against public policy as expressed in the Securities Act and will be
        governed by the final adjudication of such issue.


                                      116


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