Fortune 500 Power Moves: Which executives gained and lost power this week

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.

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Below is a recap of the C-suite developments at America’s highest-revenue-generating companies announced between Feb. 14–20, 2026 organized by sector. Titles included in this roundup: CEOs (Chief Executive Officers), COOs (Chief Operating Officers), CTOs (Chief Technology Officers), and Chief Customer Officers. We also include CFOs (Chief Financial Officers), Chief Information Officers (CIOs), CMOs (Chief Marketing Officers), CHROs (Chief Human Resources Officers), and Chief People Officers when there are Power Moves within the Fortune 500 announced pertaining to those roles.

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** Energy**

• HF Sinclair (No. 150) announced that CEO Tim Go is taking a voluntary leave of absence. Franklin Myers, chairperson of the company’s board since 2019, was appointed interim CEO of the company.

Food and drug stores

• Sprouts Farmers Market (No. 481) appointed Amanda “Mandy” Rassi Chief Customer Officer, a new role overseeing marketing, external communications, personalization, loyalty, e-commerce, and consumer insights, according to a release. Rassi most recently served as SVP, CMO of The Michaels Companies, and previously held marketing positions at Kroger (No. 27) and Procter & Gamble (No. 51).

Hotels, restaurants, and leisure

• Las Vegas Sands (No. 374) appointed Patrick Dumont CEO, effective March 1. Dumont currently serves as President and COO of the company (since 2021) and will succeed Robert G. Goldstein, who will stay with the company through March 2028 as a senior advisor.

Retailing

• Lithia Motors (No. 124) announced that SVP and Chief Innovation and Technology Officer George Hines will leave the role on March 1. The company’s IT and tech teams will now report to CFO Tina Miller and Chief Customer Officer Dianna du Preez. Hines will stay with the company in a non-executive role to help with the transition.

Technology

• Science Applications International (No. 496) appointed James (Jim) Reagan CEO. Reagan has served as interim CEO since October 2025 and as a SAIC board member since 2023, and he previously served as CFO of Leidos Holdings (No. 250). He succeeds Toni Townes-Whitley, who stepped down from the role after “the Board informed me that the company was moving in a different direction,” Townes-Whitley wrote in a LinkedIn post. Read more:The Fortune 500 lost two women of color CEOs in one week

Source: S&P Global Market Intelligence

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