Below is a recap of the C-suite developments at America’s highest-revenue-generating companies announced between June 14–20, 2025, organized by sector. Titles included in this roundup: CEOs (Chief Executive Officers), CTOs (Chief Technology Officers), and CIOs (Chief Information Officers). We also include CFOs (Chief Financial Officers), COOs (Chief Operating Officers), CHROs (Chief Human Resources Officers), Chief People Officers, CMOs (Chief Marketing Officers), and Chief Customer Officers when there are Power Moves within the Fortune 500 announced pertaining to those roles.

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Aerospace and defense

• Lockheed Martin (No. 59) appointed Craig Martell as VP and CTO, effective June 23. Martell most recently served as Chief AI Officer for Cohesity and will succeed Steve Walker, who retired in April.

Energy

• American Electric Power (No. 218) appointed Johannes Eckert as EVP, CIO and CTO, effective July 21.  Eckert most recently served as SVP and CIO of Cox Communications. 

Hotels, restaurants, and leisure

• Yum Brands (No. 491) promoted Chris Turner to CEO, effective Oct. 1. Turner currently serves as the company’s Chief Financial and Franchise Officer and will succeed David Gibbs, who is retiring after 37 years with the company. Yum Brands did not respond to Fortune’s inquiry regarding the company’s next CFO.

Retailing

• Best Buy (No. 108) announced that Brian Tilzer, Chief Digital, Analytics, and Technology Officer, is leaving the company after seven years. The company did not announce why Tilzer is leaving or discuss plans for a successor.

Source: S&P Global Market Intelligence