Billionaire John Arnold has already donated nearly half his wealth. Now he’s funding a hunt for the health risks of sports betting.

July 8, 2026

By News Team

Billionaire philanthropist John Arnold has spent years actually sticking to the Giving Pledge, which many others in his cohort have failed to follow through on. As of February, he and his wife, Laura, had donated more than $2.3 billion, mainly to criminal justice and education causes, according to Forbes. …