Press Releases

October 21, 2003

Gilead Sciences to Release Third Quarter Financial Results on Tuesday, October 28, 2003; Conference Call and Webcast to Follow

FOSTER CITY, Calif.--(BUSINESS WIRE)--Oct. 21, 2003--Gilead Sciences, Inc. (Nasdaq:GILD) announced today that its third quarter financial results will be released on Tuesday, October 28, 2003, 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.

To access the live call or webcast archive 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 1-800-231-9012 (U.S.) or 1-719-457-2617 (international) to access the call. Telephone replay is available approximately two hours after the call through 3:00 a.m. ET, November 1, 2003. To access, please call 1-888-203-1112 (U.S.) or 1-719-457-0820 (international). The conference ID number is 230527. 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.

For more information on Gilead Sciences, please visit the company's web site at www.gilead.com or call the Gilead Public Affairs Department at 1-800-GILEAD-5 (1-800-445-3235).

    CONTACT: Gilead Sciences, Inc.
             Susan Hubbard, 650-522-5715

    SOURCE: Gilead Sciences