Gilead Sciences

During the third quarter of 2019, compared to the same period in 2018:

As of September 30, 2019, Gilead had $25.1 billion of cash, cash equivalents and marketable debt securities, compared to $31.5 billion as of December 31, 2018. During the third quarter of 2019, Gilead generated $2.6 billion in operating cash flow, paid $5.05 billion in connection with the global research and development collaboration agreement and stock purchase agreement with Galapagos, repaid $1.5 billion of debt, paid cash dividends of $804 million and utilized $223 million on stock repurchases. The $5.05 billion paid to Galapagos was classified as cash flows from investing activities and included a $1.1 billion equity investment.

Gilead revised its full year 2019 guidance, initially provided on February 4, 2019 and revised on July 30, 2019.

The information presented in this document has been prepared in accordance with U.S. generally accepted accounting principles (GAAP), unless otherwise noted as non-GAAP. Management believes non-GAAP information is useful for investors, when considered in conjunction with Gilead’s GAAP financial information, because management uses such information internally for its operating, budgeting and financial planning purposes. Non-GAAP information is not prepared under a comprehensive set of accounting rules and should only be used to supplement an understanding of Gilead’s operating results as reported under GAAP. Non-GAAP measures may be defined and calculated differently by other companies in the same industry. A reconciliation between GAAP and non-GAAP financial information is provided in the tables on pages 7 through 9.

The live webcast of the call can be accessed at Gilead’s Investors page at http://investors.gilead.com/. Please connect to the website at least 15 minutes prior to the start of the call to allow adequate time for any software download that may be required to listen to the webcast. Alternatively, please call 877-359-9508 (U.S.) or 224-357-2393 (international) and dial the conference ID 6094972 to access the call. Telephone replay will be available approximately two hours after the call through 8:00 p.m. Eastern Time, October 26, 2019. To access the replay, please call 855-859-2056 (U.S.) or 404-537-3406 (international) and dial the conference ID 6094972. The webcast will be archived on www.gilead.com for one year.

Gilead Sciences, Inc. is a research-based biopharmaceutical company that discovers, develops and commercializes innovative medicines in areas of unmet medical need. The company strives to transform and simplify care for people with life-threatening illnesses around the world. Gilead has operations in more than 35 countries worldwide, with headquarters in Foster City, California.

Statements included in this press release that are not historical in nature are forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Gilead cautions readers that forward-looking statements are subject to certain risks and uncertainties that could cause actual results to differ materially. These risks and uncertainties include: Gilead’s ability to achieve its anticipated full year 2019 financial results; Gilead’s ability to sustain growth in revenues for its antiviral and other programs; the risk that private and public payers may be reluctant to provide, or continue to provide, coverage or reimbursement for new products; austerity measures in European countries that may increase the amount of discount required on Gilead’s products; an increase in discounts, chargebacks and rebates due to ongoing contracts and future negotiations with commercial and government payers; a larger than anticipated shift in payer mix to more highly discounted payer segments and geographic regions and decreases in treatment duration; availability of funding for state AIDS Drug Assistance Programs (ADAPs); continued fluctuations in ADAP purchases driven by federal and state grant cycles as well as purchases by retail pharmacies and other non-wholesaler locations with whom Gilead has no inventory management agreements may not mirror patient demand and may cause fluctuations in Gilead’s earnings; market share and price erosion caused by the introduction of generic versions of our products; an uncertain global macroeconomic environment; potential amendments to the Affordable Care Act or other government action that could have the effect of lowering prices or reducing the number of insured patients; Gilead’s ability to initiate clinical trials in its currently anticipated timeframes; the levels of inventory held by wholesalers and retailers which may cause fluctuations in Gilead’s earnings; Gilead’s ability to realize the potential benefits of collaborations or licensing arrangements, including with Galapagos and Renown; Gilead’s ability to submit new drug applications for new product candidates in the timelines currently anticipated, including a new drug application to FDA for filgotinib for the treatment of RA; Gilead’s ability to receive regulatory approvals in a timely manner or at all, for new and current products, including EMA and MHLW approvals for filgotinib; Gilead’s ability to successfully commercialize its products, including Yescarta and Biktarvy in China; the risk that physicians and patients may not see advantages of these products over other therapies and may therefore be reluctant to prescribe the products; safety and efficacy data from clinical studies may not warrant further development of Gilead’s product candidates, including filgotinib; Gilead’s ability to pay dividends or complete its share repurchase program due to changes in its stock price, corporate or other market conditions; fluctuations in the foreign exchange rate of the U.S. dollar that may cause an unfavorable foreign currency exchange impact on Gilead’s future revenues and pre-tax earnings; and other risks identified from time to time in Gilead’s reports filed with the U.S. Securities and Exchange Commission (the SEC). In addition, Gilead makes estimates and judgments that affect the reported amounts of assets, liabilities, revenues and expenses and related disclosures. Gilead bases its estimates on historical experience and on various other market specific and other relevant assumptions that it believes to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. There may be other factors of which Gilead is not currently aware that may affect matters discussed in the forward-looking statements and may also cause actual results to differ significantly from these estimates. Further, results for the quarter ended September 30, 2019 are not necessarily indicative of operating results for any future periods. You are urged to consider statements that include the words may, will, would, could, should, might, believes, estimates, projects, potential, expects, plans, anticipates, intends, continues, forecast, designed, goal or the negative of those words or other comparable words to be uncertain and forward-looking. Gilead directs readers to its press releases, Quarterly Report on Form 10-Q for the quarter ended June 30, 2019 and other subsequent disclosure documents filed with the SEC. Gilead claims the protection of the Safe Harbor contained in the Private Securities Litigation Reform Act of 1995 for forward-looking statements.

All forward-looking statements are based on information currently available to Gilead and Gilead assumes no obligation to update or supplement any such forward-looking statements other than as required by law. Any forward-looking statements speak only as of the date hereof or as of the dates indicated in the statements.

Gilead owns or has rights to various trademarks, copyrights and trade names used in its business, including the following: GILEAD®, GILEAD SCIENCES®, AMBISOME®, ATRIPLA®, BIKTARVY®, CAYSTON®, COMPLERA®, DESCOVY®, DESCOVY FOR PREP™, EMTRIVA®, EPCLUSA®, EVIPLERA®, GENVOYA®, HARVONI®, HEPSERA®, LETAIRIS®, ODEFSEY®, RANEXA®, SOVALDI®, STRIBILD®, TRUVADA®, TRUVADA FOR PREP®, TYBOST®, VEMLIDY®, VIREAD®, VOSEVI®, YESCARTA® and ZYDELIG®.

LEXISCAN® is a registered trademark of Astellas U.S. LLC. MACUGEN® is a registered trademark of Eyetech, Inc. SYMTUZA® is a registered trademark of Janssen Sciences Ireland UC. TAMIFLU® is a registered trademark of Hoffmann-La Roche Inc.