Daniel O’day
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Daniel O’Day is Chairman and Chief Executive Officer of Gilead Sciences. He joined Gilead in March 2019 as Chairman of the Board of Directors and Chief Executive Officer. Before joining Gilead, he was Chief Executive Officer of Roche Pharmaceuticals, following a career at Roche that spanned more than three decades across executive roles in its pharmaceuticals and diagnostics divisions in North America, Europe, and Asia. He is known for leading Gilead Sciences and for his prior leadership roles at Roche, including service on Roche’s Corporate Executive Committee and on boards including Genentech, Flatiron Health, and Foundation Medicine.
Updated 15 September 2026
Public sources: gilead.com
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