ABOUT SEI

Corporate Contacts

Mark Samuels
SEI, SVP
+1 610 676-2024
msamuels@seic.com

Murray Louis
SEI, VP
+1 610 676-1932
mlouis@seic.com

Larry Wexler
SEI
+1 610 676-1440
lwexler@seic.com

Press

Feb
1
2007

SEI Investments Reports Fourth-Quarter 2006 Results

Net Income up 24%

OAKS, Pa., Feb. 1 /PRNewswire-FirstCall/ -- SEI Investments Company (Nasdaq: SEIC) today announced financial results for fourth-quarter 2006, reporting increases in revenues, net income and earnings per share, compared to the corresponding period for the prior year. Revenues in the fourth- quarter 2006 include (in thousands) $80,358 from LSV Asset Management (LSV) due to the consolidation of its operations with SEI. Revenues in the fourth- quarter 2006 without LSV are (in thousands) $235,156, an increase of 16 percent.

    Consolidated Overview   For the Three Months       For the Twelve Months
    (In thousands, except     Ended December 31,         Ended December 31,
     earnings per share)    2006      2005      %       2006       2005    %

    Revenues              $315,514  $203,587   55%   $1,175,749  $773,007  52%
    Net Income
     Before Taxes           98,054    80,335   22%      358,756   295,209  22%
    Net Income              63,624    51,255   24%      236,990   188,344  26%
    Diluted Earnings
     Per Share                $.62      $.50   24%        $2.33     $1.83  27%

"We are satisfied with the results for both the quarter and the year, especially since we are shifting into the execution stage of our new strategies," said Alfred P. West, Jr., SEI Chairman and CEO.

"We are encouraged by the successful beta of the global wealth platform. The investments we are making are on schedule and our transformation is well underway. In the long run, we remain firm in our belief that what we are doing will help us provide our clients with increased opportunities for success and allow us to grow our future revenues and profits more rapidly."

    Summary of Fourth-Quarter and Year to Date Results by Business Segment

    (In thousands)                      For the Three Month Period Ended
                                                 December 31,
                                        2006           2005              %
    Private Banking and Trust:
      Revenues                        $70,803         $66,443            7%
      Expenses                         47,530          43,101           10%
      Operating Profit                $23,273         $23,342            --
      Operating Margin                    33%             35%

    Investment Advisors:
      Revenues                         60,070          53,682           12%
      Expenses                         29,162          22,847           28%
      Operating Profit                 30,908          30,835            --
      Operating Margin                    51%             57%

    Enterprises:
      Revenues                         45,796          36,958           24%
      Expenses                         28,563          24,461           17%
      Operating Profit                 17,233          12,497           38%
      Operating Margin                    38%             34%

    Money Managers:
      Revenues                         32,826          27,156           21%
      Expenses                         23,641          22,201            6%
      Operating Profit                  9,185           4,955           85%
      Operating Margin                    28%             18%

    Investments in New Businesses:
      Revenues                         25,661          19,348           33%
      Expenses                         32,941          25,785           28%
      Operating Loss                  (7,280)         (6,437)           13%
      Operating Margin                  (28%)           (33%)

    LSV
      Revenues                         80,358              --            --
      Expenses (1)                     48,959              --            --
      Operating profit (2)             31,399              --            --
                                          39%
    Consolidated Segment Totals:
      Revenues                       $315,514        $203,587           55%
      Expenses                        210,796         138,395           52%
      Operating Profit               $104,718         $65,192           61%
      Operating Margin                    33%             32%



    (In thousands)                          For the Twelve Month Period
                                                 Ended December 31,
                                       2006            2005              %
    Private Banking and Trust:
      Revenues                       $283,191        $266,129            6%
      Expenses                        183,727         168,773            9%
      Operating Profit                $99,464         $97,356            2%
      Operating Margin                    35%             37%

    Investment Advisors:
      Revenues                        225,716         203,423           11%
      Expenses                        111,907          87,857           27%
      Operating Profit                113,809         115,566          (2%)
      Operating Margin                    50%             57%

    Enterprises:
      Revenues                        164,962         132,013           25%
      Expenses                        106,377          89,022           19%
      Operating Profit                 58,585          42,991           36%
      Operating Margin                    36%             33%

    Money Managers:
      Revenues                        118,964         103,272           15%
      Expenses                         90,799          85,595            6%
      Operating Profit                 28,165          17,677           59%
      Operating Margin                    24%             17%

    Investments in New Businesses:
      Revenues                         91,795          68,170           35%
      Expenses                        118,253          95,909           23%
      Operating Loss                 (26,458)        (27,739)          (5%)
      Operating Margin                  (29%)           (41%)

    LSV
      Revenues                        291,121              --            --
      Expenses (1)                    178,727              --            --
      Operating profit (2)            112,394              --            --
                                          39%
    Consolidated Segment Totals:
      Revenues                     $1,175,749        $773,007           52%
      Expenses                        789,790         527,156           50%
      Operating Profit               $385,959        $245,851           57%
      Operating Margin                    33%             32%


    (1)  Includes $42,862 and $153,381 for the three and twelve month periods
         ended December 31, 2006, respectively, of minority interest to the
         other partners of LSV.

    (2)  Our proportionate share in the earnings of LSV for the three and
         twelve month periods ending December 31, 2005 was $21,000 and
         $74,818, respectively, and was reflected in Equity in the earnings of
         unconsolidated affiliate.


A reconciliation of the totals reported for the business segments to the applicable line items in the Consolidated Statements of Income for the three and twelve month periods ended December 31, 2006 are as follows:

                                Three months ended     Twelve months ended
                                    December 31,           December 31,
                                 2006         2005      2006          2005

    Total operating profit
     from business segments    $104,718      $65,192   $385,959     $245,851

    Corporate overhead
     expenses                   (10,280)      (8,567)   (38,901)     (33,898)
    Equity in the earnings
     of unconsolidated
     affiliate                      --        21,000        --        74,818
    Net (loss) gain from
     investments                   (512)        (132)    (2,378)          87
    Interest, net                 2,986        2,275      8,057        6,843
    Other income                    --           567      1,588        1,508
    LSV Employee Group (1)        1,142          --       4,431          --

    Income before taxes         $98,054      $80,335   $358,756     $295,209


    (1)  LSV Employee Group includes $15 and $59 expense for the three and
         twelve month periods ended December 31, 2006, respectively, included
         in corporate overhead expenses, $15 and $57 for the three and twelve
         month periods ended December 31, 2006, respectively, included in
         interest income, and $1,142 and $4,429 for the three and twelve month
         periods ended December 31, 2006, respectively, included in interest
         expense.  These items are offset through Minority interest since SEI
         does not have any ownership in LSV Employee Group LLC.



    Fourth-Quarter Business Commentary:

     --  As of the first-quarter 2006, SEI began to consolidate the operations
         of LSV Asset Management and LSV Employee Group. As of the fourth-
         quarter 2006, the company's percentage ownership in LSV remained at
         43 percent. In the fourth-quarter 2006, the company recognized $31.4
         million as its portion of the earnings from LSV versus $21.0 million
         in fourth-quarter 2005.
     --  All the other business segments reported revenue gains versus year
         ago.
     --  While Private Banking & Trust revenue was higher versus fourth-
         quarter 2005, it was down versus third-quarter 2006. Third-quarter
         2006 contained a previously reported $4.7 million one time revenue
         event related to a contract buyout.
     --  The Investment Advisors, Enterprises, Money Managers and Investments
         in New Businesses segments all realized double digit revenue growth
         versus year ago levels due to a combination of improved capital
         markets and net new business.
     --  The Money Managers segment continues to realize improved operating
         margins as a result of continuing revenue growth.
     --  The tax rate for the fourth-quarter 2006 was approximately 35%, vs.
         31.8% in the third-quarter 2006.
     --  Net income was negatively affected by option expense under
         FAS 123 (R) of $9.8 million in the fourth-quarter 2006, versus $7.1
         million in the third-quarter 2006.
     --  Assets under management grew by $12.6 billion during the fourth-
         quarter 2006 to $181.5 billion.
     --  In the fourth-quarter 2006, SEI purchased 487,500 shares of its
         common stock for $28.2 million.

    Earnings Conference Call

A conference call to review earnings is scheduled for 2:00 PM EDT on February 1, 2007. Investors may listen to the call at http://www.seic.com/, or listen at http://www.earnings.com, a service of Thomson Streetevents. The call may also be accessed at numerous financial services web sites including AOL and Yahoo. Investors may also listen to replays at these web sites, or by telephone at (USA) 1-800-475-6701; (International) 320-365-3844, access code 859989.

About SEI

SEI (Nasdaq: SEIC) is a leading global provider of outsourced asset management, investment processing and investment operations solutions. The company's innovative solutions help corporations, financial institutions, financial advisors, and affluent families create and manage wealth. As of the period ending December 31, 2006, through its subsidiaries and partnerships in which the company has a significant interest, SEI administers $366.6 billion in mutual fund and pooled assets and manages $181.5 billion in assets. SEI serves clients, conducts or is registered to conduct business and/or operations, from more than 20 offices in over a dozen countries. For more information, visit http://www.seic.com/.

Many of our responses may be considered "forward-looking statements" and include discussions about future operations, strategies and financial results. Forward-looking statements are based upon estimates and assumptions that involve risks and uncertainties, many of which are beyond our control or are subject to change. Although we believe our assumptions are reasonable, they could be inaccurate. Our actual future revenues and income could differ materially from our expected results. We have no obligation to publicly update or revise any forward-looking statements.

                           SEI INVESTMENTS COMPANY
                      CONSOLIDATED STATEMENTS OF INCOME
                    (In thousands, except per share data)
                                 (unaudited)

                                               Three Months Ended December 31,
                                                      2006           2005

    Asset Management, admin. and
     distribution fees (1)                          $249,810       $142,963
    Information processing and software
     servicing fees                                   53,693         48,572
    Transaction-based and trade execution fees        12,011         12,052

    Total Revenues                                   315,514        203,587

    Commissions and Fees                              39,937         34,094
    Compensation, benefits and other personnel        84,128         62,416
    Consulting, outsourcing and professional fees     20,827         16,985
    Data processing and computer related              10,319          7,980
    Facilities, supplies and other costs              16,321         21,339
    Depreciation and amortization                      5,493          4,148

    Total Expenses (1)                               177,025        146,962

    Income before interest and taxes                 138,489         56,625

    Minority Interest                                (42,909)            --
    Equity in earnings of unconsolidated affiliate        --         21,000
    Net loss on investments                             (512)          (132)
    Interest income (1)                                4,372          2,628
    Interest expense (1)                              (1,386)          (353)
    Other income                                          --            567

    Income before taxes                               98,054         80,335

    Income taxes                                      34,430         29,080

    Net income                                       $63,624        $51,255


    Diluted earnings per common share                   $.62           $.50

    Shares used to calculate diluted
     earnings per common share                       102,330        101,872

    Basic earnings per common share                     $.64           $.52

    Shares used to calculate basic
     earnings per common share                        98,904         99,105

    (1)  Includes the operations of LSV and LSV Employee Group for the fourth-
         quarter 2006.  Revenues include $80,358 from LSV, Expenses includes
         $6,097 from LSV, Interest income includes $425 from LSV and LSV
         Employee Group, and Interest expense includes $1,142 from LSV
         Employee Group.  The portion of ownership of LSV and LSV Employee
         Group by non-affiliated SEI entities is reflected through Minority
         interest.  Our proportionate share in the earnings of LSV for fourth-
         quarter 2005 was reflected in Equity in the earnings of
         unconsolidated affiliate.



                           SEI INVESTMENTS COMPANY
                      CONSOLIDATED STATEMENTS OF INCOME
                    (In thousands, except per share data)

                                              Twelve Months Ended December 31,
                                                      2006           2005
                                                   (unaudited)
    Asset Management, admin. and
     distribution fees (1)                          $918,142       $531,594
    Information processing and
     software servicing fees                         213,066        197,992
    Transaction-based and trade execution fees        44,541         43,421

    Total Revenues                                 1,175,749        773,007

    Commissions and Fees                             147,835        129,303
    Compensation, benefits and other personnel       315,502        242,453
    Consulting, outsourcing and professional
     fees                                             77,753         70,612
    Data processing and computer related              37,755         30,409
    Facilities, supplies and other costs              69,306         71,129
    Depreciation and amortization                     21,925         17,148

    Total Expenses (1)                               670,076        561,054

    Income before interest and taxes                 505,673        211,953

    Minority Interest                               (154,184)            --
    Equity in earnings of unconsolidated
     affiliate                                            --         74,818
    Net (loss) gain on investments                    (2,378)            87
    Interest income (1)                               13,521          8,367
    Interest expense (1)                              (5,464)        (1,524)
    Other income                                       1,588          1,508

    Income before taxes                              358,756        295,209

    Income taxes                                     121,766        106,865

    Net income                                      $236,990       $188,344


    Diluted earnings per common share                  $2.33          $1.83

    Shares used to calculate diluted
     earnings per common share                       101,633        103,138

    Basic earnings per common share                    $2.40          $1.88

    Shares used to calculate basic
     earnings per common share                        98,682        100,371

    (1)  Includes the operations of LSV and LSV Employee Group for the twelve
         months in 2006.  Revenues include $291,121 from LSV, Expenses
         includes $25,346 from LSV, Interest income includes $1,444 from LSV
         and LSV Employee Group, and Interest expense includes $4,429 from LSV
         Employee Group.  The portion of ownership of LSV and LSV Employee
         Group by non-affiliated SEI entities is reflected through Minority
         interest.  Our proportionate share in the earnings of LSV for twelve-
         months in 2005 was reflected in Equity in the earnings of
         unconsolidated affiliate.



                           SEI INVESTMENTS COMPANY
                           CONDENSED BALANCE SHEETS
                                (In thousands)

                                                  (unaudited)
                                                  December 31,   December 31,
                                                      2006           2005
    Assets

    Cash and short-term investments (1)             $286,948       $130,128
    Restricted Cash                                   10,250         10,250
    Receivables (1)                                  244,599        128,545
    Securities owned                                  16,431         19,709
    Other current assets                              28,245         17,344

      Total current assets                           586,473        305,976

    Property and Equipment, net                      130,732        114,505
    Investments available for sale                    71,690         54,632
    Capitalized Software, net                        180,014        116,670
    Goodwill (2) (3)                                  95,062             --
    Investment in unconsolidated affiliate (1)            --         51,941
    Other assets                                      22,956         13,423

      Total assets                                $1,086,927       $657,147



    Liabilities

    Current liabilities (1) (2) (3)                 $196,127       $167,470
    Long-term debt (2) (3)                            67,538          9,000
    Deferred income taxes                             76,148         58,989
    Minority Interest                                116,602             --

    Shareholders' Equity                             630,512        421,688

      Total liabilities and shareholders'
       equity                                     $1,086,927       $657,147


    (1)  Includes the accounts of LSV as of December 31, 2006.  Cash includes
         $71,457, Receivables includes $85,092, and Current Liabilities
         includes $6,432 from LSV.  Prior to 2006, our investment in the net
         assets of LSV was recorded in Investment in unconsolidated affiliate.
    (2)  Primarily relates to LSV Employee Group.  Goodwill was primarily
         generated as a result of LSV Employee Group buying an equity
         investment of LSV for $92,000.  LSV Employee Group financed the
         purchase price, of which $9,100 is classified as a current liability
         and the remaining $62,538 is reflected as Long-term debt at December
         31, 2006.
    (3)  The Company provided an unsecured loan guarantee to LSV Employee
         Group which resulted in consolidating the accounts of LSV and LSV
         Employee Group.



                           SEI INVESTMENTS COMPANY
                                ASSET BALANCES
                                (In millions)

                       Dec. 31,    Mar. 31,    Jun. 30,    Sep. 30,   Dec. 31,
                         2005        2006        2006        2006       2006
    Private Banking
     and Trust:
      Equity/Fixed
       Income prgms.    $2,363      $2,404      $2,109      $2,101      $2,093
      Collective
       Trust Fund
       prgm.             1,657       1,581       1,459       1,460       1,251
      Liquidity
       funds             7,485       7,139       7,627       7,707       8,513
      Total assets
       under mgmt.     $11,505     $11,124     $11,195     $11,268     $11,857

      Client assets
       under admin.     10,275      15,279      15,157      14,449      14,461
      Total assets     $21,780     $26,403     $26,352     $25,717     $26,318

    Investment
     Advisors:
      Equity/Fixed
       Income prgms.   $29,553     $31,569     $30,709     $31,977     $33,888
      Collective
       Trust Fund
       prgm.             2,479       2,482       2,473       2,425       2,480
      Liquidity
       funds             1,103       1,017       1,306       1,263       1,421
      Total assets
       under mgmt.     $33,135     $35,068     $34,488     $35,665     $37,789

    Enterprises:
      Equity/Fixed
       Income prgms.   $30,203     $32,083     $32,709     $34,674     $37,720
      Collective
       Trust Fund
       prgm.             1,172       1,157       1,147       1,150       1,081
      Liquidity
       funds             3,153       4,076       3,823       4,167       3,371
      Total assets
       under mgmt.     $34,528     $37,316     $37,679     $39,991     $42,172

    Money Managers:
      Equity/Fixed
       Income prgms.       $11         $33         $34         $34         $30
      Collective
       Trust Fund
       prgm.             8,770       9,096       8,923       9,009       8,675
      Liquidity
       funds               412         505         363         253         215
      Total assets
       under mgmt.      $9,193      $9,634      $9,320      $9,296      $8,920

      Client assets
       under admin.    147,357     151,688     153,406     161,000     170,344
      Total assets    $156,550    $161,322    $162,726    $170,296    $179,264

    Investments in
     New Businesses:
      Equity/Fixed
       Income prgms.   $12,396     $12,848     $13,322     $13,931     $15,779
      Total assets
       under mgmt.     $12,396     $12,848     $13,322     $13,931     $15,779

      Client assets
       under admin.      5,894       4,496       4,053         552         277
      Total assets     $18,290     $17,344     $17,375     $14,483     $16,056

    LSV Asset
     Management
      Equity/Fixed
       Income
       prgms.          $47,781     $54,128     $55,687     $58,785     $64,970

    Consolidated:
      Equity/Fixed
       Income prgms
       (A,B)          $122,307    $133,065    $134,570    $141,502    $154,480
      Collective
       Trust Fund
       prgm.           14,078       14,316      14,002      14,044      13,487
      Liquidity
       funds (B)       12,153       12,737      13,119      13,390      13,520
      Total assets
       under mgmt.   $148,538     $160,118    $161,691    $168,936    $181,487

      Client assets
       under admin.   163,526      171,463     172,616     176,001     185,082
      Total assets   $312,064     $331,581    $334,307    $344,937    $366,569


    (A)  Equity/Fixed Income programs include $3,457 of assets invested in
         SEI's Asset Allocation Funds at 12/31/06
    (B)  In addition to the numbers presented, SEI also administers an
         additional $8,772 in Funds of Funds assets (as of December 31, 2006)
         on which SEI does not earn an administration fee.