July 10, 2026, 12:30 PM ETKyndryl Holdings (No. 300 on the Fortune 500) appointed Ellen Johnson CFO, effective Aug. 6.Courtesy of Kyndryl.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 27-July 10, 2026, organized by sector. Titles included in this roundup: CFOs (Chief Financial Officers), COOs (Chief Operating Officers) and CTOs (Chief Technology Officers). We also include CEOs (Chief Executive Officers), CIOs (Chief Information Officers), CMOs (Chief Marketing Officers), CHROs (Chief Human Resources 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
HF Sinclair (No. 171) appointed Steven Ledbetter President and COO. He previously served as EVP, Commercial of the company. The COO role was previously vacant since previous COO Tim Go was promoted to CEO in 2023, before going on voluntary leave this past February.
