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David Day
Chief Financial Officer at Magnite
Leading Lotame's pivot to cookieless identity and data enrichment solutions, making the company a key reference point for publishers and advertisers seeking alternatives to third-party cookies.
Last updated May 26, 2026 by the ATDb Editorial Team
Bio
David Day is Chief Financial Officer of Magnite, the largest independent sell-side advertising platform — a role he has held since the Rubicon Project–Telaria merger formed Magnite. He announced his retirement in April 2026 and will remain CFO through September 2026.
Previous Roles
Senior Vice President
Lotame (Prior to CEO role)
Senior Leadership Role
Data/AdTech Industry (Unknown)
Expertise
Cookieless Identity SolutionsIdentity ResolutionData Management Platforms (DMP)Data EnrichmentAudience TargetingProgrammatic AdvertisingData CollaborationPrivacy-First Advertising
Notable Achievements
- Led Lotame's strategic transformation into a cookieless-first data solutions company
- Oversaw development and expansion of Lotame Panorama ID, a cookieless identity solution for the open web
- Grew Lotame's global publisher and marketer partnerships during the industry's identity transition period
Speaking Topics
Cookieless Advertising and Identity ResolutionThe Future of Data CollaborationPrivacy-First Audience TargetingPublisher Monetization in a Post-Cookie World
Connections