On October 20, 2009, Gilead Sciences, Inc., a Delaware corporation (Gilead), issued a press release announcing its financial results for the quarter ended September 30, 2009. A copy of the press release is filed as Exhibit 99.1 to this report.

Non-GAAP net income attributable to Gilead and net income attributable to Gilead per diluted share for the three and nine months ended September 30, 2009 are presented excluding the after-tax impact of acquisition-related transaction costs, amortization of inventory mark-up and amortization of purchased intangibles; restructuring expenses; and stock-based compensation expenses, and have been adjusted for the application of Accounting Principles Board Opinion No. 25, "Accounting for Stock Issued to Employees" (APB 25), in computing non-GAAP dilutive securities. Non-GAAP net income attributable to Gilead and net income attributable to Gilead per diluted share for the three months ended September 30, 2008 are presented excluding the after-tax impact of stock-based compensation expenses, and have been adjusted for the application of APB 25 in computing non-GAAP dilutive securities. Non-GAAP net income attributable to Gilead and net income attributable to Gilead per diluted share for the nine months ended September 30, 2008 are presented excluding the after-tax impact of stock-based compensation expenses and purchased in-process research and development (R&D) expense, and have been adjusted for the application of APB 25 in computing non-GAAP dilutive securities. Non-GAAP R&D expenses for the three and nine months ended September 30, 2009 are presented excluding the impact of restructuring expenses and stock-based compensation expenses. Non-GAAP selling, general and administrative (SG&A) expenses for the three and nine months ended September 30, 2009 are presented excluding the impact of acquisition-related transaction costs, restructuring expenses and stock-based compensation expenses. Non-GAAP R&D expenses and SG&A expenses for the three and nine months ended September 30, 2008 are presented excluding the impact of stock-based compensation expenses. Management believes this non-GAAP information is useful for investors, taken in conjunction with Gilead's GAAP financial statements, 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 U.S. GAAP.

The information in this Form 8-K and the exhibit attached hereto shall not be deemed "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the Exchange Act), or otherwise subject to the liabilities under that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such filing.

(d) Exhibits

   Exhibit
   Number    Description

    99.1     Press Release, issued by Gilead Sciences, Inc. on October 20, 2009