ABOUT SEI

Investor Contact

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

Press Contact

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

Press

May
21
2012

SEI To Host Investor Conference

Public Invited to Monitor Webcast

OAKS, Pa., May 21, 2012 Ė SEI Investments Company (NASDAQ:SEIC) will present a live webcast of its annual Investor Conference on Wednesday, May 30, 2012, 8:30 a.m. to approximately 1:00 p.m. (ET).

SEIís Investor Conference, attended by institutional investors and industry analysts, will feature presentations by SEIís 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/investors. The webcast may also be heard at www.earnings.com†and numerous other financial services portals on the Internet. It will be available for replay shortly after the conference and will be archived for one year.

About SEI

SEI (NASDAQ:SEIC) is a leading global provider of investment processing, fund processing, and investment management business outsourcing solutions that help corporations, financial institutions, financial advisors, and ultra-high-net-worth families create and manage wealth. As of March 31, 2012, through its subsidiaries and partnerships in which the company has a significant interest, SEI manages or administers $428 billion in mutual fund and pooled or separately managed assets, including $189 billion in assets under management and $239 billion in client assets under administration. For more information, visit www.seic.com.