SUNW to Conduct Financial Update Conference Call on Wednesday, May 31, 2006

May 31 2006

Sun Microsystems will conduct a Financial Update Conference Call on Wednesday, May 31, 2006, beginning at 2:30 p.m. PT. The general public is welcome to listen to the conference call via Sun's Investor Relations website at http://www.sun.com/investors.

Sun periodically webcasts company announcements, product launch events and speeches by executives at investment bank conferences, industry events and other forums. These webcasts are available at http://www.sun.com/investors, and Sun encourages investors to check this website frequently for details on upcoming events. For the remainder of the current quarter, Q4 Fiscal 2006, Sun is scheduled to participate in one conference, the Bear Stearns Technology Conference, on Monday, June 12, in New York City.

About Sun Microsystems, Inc.

A singular vision -- "The Network Is The Computer" -- guides Sun in the development of technologies that power the world's most important markets. Sun's philosophy of sharing innovation and building communities is at the forefront of the next wave of computing: the Participation Age. Sun can be found in more than 100 countries and on the Web at http://sun.com.

Sun, Sun Microsystems, the Sun logo, and The Network Is The Computer are trademarks or registered trademarks of Sun Microsystems, Inc. in the United States and in other countries.

Sun Microsystems Contacts:

Media Relations:

Stephanie Von Allmen, Sun Microsystems, (650) 786-8589,

stephanie.vonallmen@sun.com

Financial Analysts:

Paul Ziots, Sun Investor Relations, (650) 786-0411, paul.ziots@sun.com

Industry Analyst Relations:

Joanne Masters, Sun Microsystems, (650) 786-0847, joanne.masters@sun.com