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David Day

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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.

Last updated Jun 6, 2026 by the ATDb Editorial Team

Role
Chief Financial Officer
Company
Magnite
Based
New York, New York, United States
Connections
2
Years in industry
15 years

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.

Career

  • Senior Vice President

    Lotame · Prior to CEO role

  • Senior Leadership Role

    Data/AdTech Industry · Unknown

Expertise & education

Expertise

Cookieless Identity SolutionsIdentity ResolutionData Management Platforms (DMP)Data EnrichmentAudience TargetingProgrammatic AdvertisingData CollaborationPrivacy-First Advertising

Speaking topics

Cookieless Advertising and Identity ResolutionThe Future of Data CollaborationPrivacy-First Audience TargetingPublisher Monetization in a Post-Cookie World

Recognition

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
Connection details