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. 5-11, 2026, organized by sector. Titles included in this roundup: CTOs (Chief Technology Officers) and CMOs (Chief Marketing Officers). We also include CEOs (Chief Executive Officers), CFOs (Chief Financial Officers), COOs (Chief Operating 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

• Equinix (No. 436) appointed DD Dasgupta CMO. He previously served as VP, Product and Solution Marketing at the company and held similar roles at Cisco Systems (No. 83) and Juniper Networks, now a part of Hewlett Packard Enterprise (No. 133), before then. He succeeds Adam Berlew.

Media

• Sirius XM Holdings (No. 463) appointed Sean Gibbons SVP, Chief Product and Technology Officer. Gibbons has been with the company since 2000. Joseph Inzerillo served as the company’s EVP, Chief Product and Technology Officer until Dec. 2024 when he left to pursue other opportunities; he now serves as President of Enterprise and AI Technology at Salesforce (No. 114).

Technology

• Workday (No. 430) appointed Sarah Kennedy Ellis CMO, effective Oct. 5. She most recently served as VP, Global Marketing, Google Cloud and Google Workspace at Google, owned by Alphabet (No. 5), and held senior marketing roles at Adobe (No. 192) before that. She succeeds Emma Chalwin, who left Workday in July to become CMO of Accenture (No. 204 on the Fortune Global 500).

Source: S&P Global Market Intelligence

This story was originally featured on Fortune.com