John Gentry, OpenX CEO and Adtech Pioneer, Dies After Battle With Cancer

January 17, 2026

John Gentry, OpenX CEO and Adtech Pioneer, Dies After Battle With Cancer

John Gentry, a longtime advertising executive and the chief executive officer of supply-side platform OpenX, died Wednesday evening after a long battle with cancer. He was 58. A post to Gentry’s LinkedIn profile Thursday evening read: “If you are reading this, it means that I’m no longer around and lost my fight with cancer. While

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Published by adweek.com