Fervo Energy, a geothermal energy startup based in Houston, has raised $244 million from oil and gas producer Devon Energy and billionaire energy investor John Arnold, among others. Oklahoma-based ...

In a 2009 file photo, John Arnold, then head of the hedge fund Centaurus Advisors of Houston, testifies before a Washington, D.C.., commission. He has since become a billionaire philanthropist ...

Laura and John Arnold landed at No. 5 for giving $483.6 million to foundations in 2023. Nancy and Rich Kinder claimed the No. 38 spot for donating more than $55 million to their eponymous foundation.

Mark Zuckerberg's (above) appointment of John Arnold to Meta's board has been slammed by Republican lawmakers. AP Ahead of the election, Republican lawmakers are raising alarm bells about Texas ...

John Arnold argues that private markets solve problems better than government or philanthropy, and that real reform comes from decentralization, incentives, and evidence—not top-down control.