June 18, 2026, 1:45 PM ETFiserv (No. 215 on the Fortune 500) appointed Takis Georgakopoulos CEO.Courtesy of Fiserv.This is Fortune 500 Power Moves, a column tracking executive shifts—from appointments and promotions to resignations and retirements—within the highest ranks of Fortune 500 companies.
Below is a recap of the C-suite developments at America’s highest-revenue-generating companies announced between June 13-18, 2026, organized by sector. Titles included in this roundup: CEOs (Chief Executive Officers), CFOs (Chief Financial Officers), COOs (Chief Operating Officers), CIOs (Chief Information Officers), and CHROs (Chief Human Resources Officers). We also include CTOs (Chief Technology Officers), CMOs (Chief Marketing Officers), Chief People Officers, and Chief Customer Officers when there are Power Moves within the Fortune 500 announced pertaining to those roles.
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Energy
Newmont (No. 200) appointed Brian Tabolt CFO, Mark Rodgers COO, and David Thornton CTO, effective July 1. Tabolt currently serves as Chief Accounting Officer and Group Head, Finance at the company; Rodgers currently serves as Managing Director, Africa and Asia Pacific; and Thornton currently serves as Managing Director, Americas. Tabolt previously held executive roles at Molson Coors Beverage (No. 390). Tabolt will take over from Chief Legal Officer Peter Wexler, who has been interim CFO since Karyn Ovelmen resigned in July 2025. Rodgers will succeed Natascha Viljoen, who became CEO in January. Thornton will succeed Aaron Puna.
