SEI Investments Company 10-Q 2009
CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002
I, Alfred P. West, Jr., Chairman and Chief Executive Officer, and I, Dennis J. McGonigle, Chief Financial Officer, of SEI Investments Company, a Pennsylvania corporation (the Company), hereby certify that, to my knowledge:
(1) The Companys Quarterly Report on Form 10-Q for the quarterly period ended September 30, 2009 (the Form 10-Q) fully complies with the requirements of Section 13(a) of the Securities Exchange Act of 1934; and
(2) The information contained in the Form 10-Q fairly presents, in all material respects, the financial condition and results of operations of the Company.
A signed original of this written statement required by Section 906 has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request.