Gilead Sciences to Release Fourth Quarter and Year-End 2003 Financial Results on Thursday, January 29, 2004; Conference Call and Webcast to Follow

FOSTER CITY, Calif.--(BUSINESS WIRE)--Jan. 23, 2004--Gilead Sciences, Inc. (Nasdaq:GILD) announced today that its fourth quarter and year end 2003 financial results will be released on Thursday, January 29, 2004, at 4:00 p.m. Eastern Time. At 4:30 p.m. Gilead will webcast a conference call live on the company's internet site. The call will be led by John Martin, PhD, President and Chief Executive Officer, Mark Perry, Executive Vice President of Operations, and John Milligan, PhD, Executive Vice President and Chief Financial Officer, who will discuss the Company's year end and fourth quarter results for 2003, provide an overview of the Company and outlook and financial guidance for 2004.

To access the webcast via the internet, log on to www.gilead.com. Please connect to the company's website at least 15 minutes prior to the conference call to ensure adequate time for any software download that may be needed to hear the webcast. Alternatively, please call 1-800-299-9630 (U.S.) or 1-617-786-2904 (international) and dial the participant passcode 38849332 to access the call. Telephone replay is available approximately two hours after the call through 6:30 p.m. ET, February 1, 2004. To access, please call 1-888-286-8010 (U.S.) or 1-617-801-6888 (international) and dial the participant passcode 11470580. The webcast will be archived on www.gilead.com for one year.

Gilead Sciences is a biopharmaceutical company that discovers, develops and commercializes therapeutics to advance the care of patients suffering from life-threatening diseases worldwide. The company has seven marketed products and focuses its research and clinical programs on anti-infectives. Headquartered in Foster City, CA, Gilead has operations in the United States, Europe and Australia.