Forward-Looking Statement

This press release includes forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 that are subject to risks, uncertainties and other factors, including risks related to the possibility of unfavorable 48-week results from this or other clinical trials involving TAF, including the trial evaluating the single tablet regimen of TAF, darunavir, cobicistat and emtricitabine. Further, Gilead may be unable to obtain clinical trial results in the timelines currently anticipated and may need to modify or delay the clinical trials or to perform additional trials. Further, Gilead may make a strategic decision to discontinue development of TAF if, for example, Gilead believes commercialization will be difficult relative to other opportunities in its pipeline. There is also risk of failing to obtain approvals from regulatory authorities for TAF, alone or in combination with other products, and the New Drug Applications for elvitegravir and cobicistat may not be approved by the U.S. Food and Drug Administration or other regulatory agencies in the timelines anticipated or at all. As a result, these product candidates as standalone agents or as part of single tablet regimens may never be successfully commercialized. These risks, uncertainties and other factors could cause actual results to differ materially from those referred to in the forward-looking statements. The reader is cautioned not to rely on these forward-looking statements. These and other risks are described in detail in Gilead’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2012, as filed with the U.S. Securities and Exchange Commission. All forward-looking statements are based on information currently available to Gilead, and Gilead assumes no obligation to update any such forward-looking statements.

U.S. full prescribing information for Stribild is available at www.Stribild.com .

U.S. full prescribing information for Truvada is available at www.Truvada.com .

Stribild, Truvada and Viread are trademarks or registered trademarks of Gilead Sciences, Inc. Prezista is a registered trademark of Janssen R&D Ireland

For more information on Gilead Sciences, please visit the company’s website at www.gilead.com , follow Gilead on Twitter (@GileadSciences) or call Gilead Public Affairs at 1-800-GILEAD-5 or 1-650-574-3000.

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