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.

Below is a recap of the C-suite developments at America’s highest-revenue-generating companies announced between Sept.

12-18, 2026, organized by sector.

Titles included in this roundup: CEOs (Chief Executive Officers), COOs (Chief Operating Officers), CTOs (Chief Technology Officers), and CMOs (Chief Marketing Officers).

We also include CFOs (Chief Financial Officers), CIOs (Chief Information 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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Financials Jones Lang LaSalle (No.

175) appointed Paul Morgan to the newly created role of COO.

Morgan has been with the company since 2016 and previously served as Global Chief Operating Officer, Real Estate Management Services and CEO of Workplace Management.

Health care Accendra Health (No.

407) appointed Kenneth Gardner-Smith CEO.

The company said he is expected to assume the role in the fourth quarter of this year.

Gardner-Smith is a board member of the company and currently serves as CEO of Veritas Veterinary Partners and previously held senior roles at DaVita (No.

331) .