ABOUT SEI

Corporate Contacts

Dana Grosser
SEI
+1 610 676-2459
dgrosser@seic.com

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

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

Press

May
30
2008

SEI to Hold Investor Conference

Public Invited to Monitor Webcast

OAKS, Pa., May 30 /PRNewswire-FirstCall/ -- SEI Investments Company (Nasdaq: SEIC), a leading global provider of outsourced asset management, investment processing and investment operations solutions, will hold a live webcast of its annual Investor Conference on Wednesday, June 4, 2008, 8:30 AM to approximately 1:00 PM (ET).

The SEI Investor Conference, will be attended by institutional investors and industry analysts, and will feature presentations by SEI's top executives describing the company, its markets, and strategies for future growth.

The public is invited to view the presentation and listen to the webcast of the conference at www.seic.com (choose the Investor Information section and click on Events and Presentations). The webcast can be heard at www.earnings.com and numerous other financial services portals on the Web. It will be available for replay shortly after the end of the conference and will be archived for one year.

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 March 31, 2008, through its subsidiaries and partnerships in which the company has a significant interest, SEI administers $424 billion in mutual fund and pooled assets and manages $185 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 www.seic.com.