Magnite (NASDAQ:MGNI), the world’s largest independent sell-side advertising platform, today announced the promotion of Brian Gephart as Chief Financial Officer (CFO), effective October 1, 2026. Gephart will succeed David Day, who previously announced his retirement after a distinguished decade-long tenure leading the company's financial operations. Gephart, who has served as the Company’s Chief Accounting Officer since June 2021, will oversee Magnite’s global financial strategy and operations, including corporate finance, accounting, reporting, investor relations, treasury, and tax.

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