Below is a recap of the C-suite developments at America’s highest-revenue-generating companies announced between May 3–9, 2025, organized by sector. Titles included in this roundup: CEOs (Chief Executive Officers), COOs (Chief Operating Officers), CFOs (Chief Financial Officers), and CIOs (Chief Information Officers). We also include CTOs (Chief Technology 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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Business services

• Fiserv (No. 215) announced that Michael P. Lyons assumed the role of CEO, following the confirmation of previous CEO Frank J. Bisignano as Commissioner of the Social Security Administration on May 6. Lyons previously served as President at PNC Financial Services Group (No. 139), and Fiserv named him CEO-elect back in January.

Energy

• ConocoPhillips (No. 68) announced that W.L. Bullock will retire as CFO, effective June 1, after 39 years with the company and five years as CFO. Andy O’Brien, the company’s SVP, Strategy, Commercial, Sustainability, and Technology, will succeed Bullock while retaining responsibility for Strategy, Commercial, and Sustainability.

• Williams (No. 371) appointed Chad J. Zamarin as CEO, effective July 1. Zamarin currently serves as the company’s EVP, Corporate Strategic Development and succeeds Alan S. Armstrong, who will transition to Executive Chairman of the Board. 

Financials

• Berkshire Hathaway (No. 5) announced that the company’s board of directors voted unanimously to appoint Greg Abel, the vice chair of non-insurance operations at the company, as the company’s next CEO, effective Jan. 1, 2026. Warren Buffett plans to remain with the company as Chairman of the Board. Read more: How Greg Abel may run Berkshire Hathaway differently than Warren Buffett

• Jones Lang LaSalle (JLL, No. 193) appointed Karen Brennan as CEO of the company’s Leasing Advisory business, effective July 1. Brennan previously served as CFO of JLL. Kelly Howe, currently the CFO for the company’s Leasing Advisory business, will succeed Brennan as the new CFO of JLL.

• Unum Group (No. 332) appointed Sheila Anderson as EVP and Chief Information and Digital Officer. Anderson previously served as EVP and CIO at Aflac (No. 222).

Food, beverages, and tobacco

• Kellanova (No. 272) announced that CFO Amit Banati is resigning from the company, effective May 12, to become CFO of Kenvue. John Renwick, the company’s VP of Investor Relations and Corporate Planning, is now acting SVP and CFO of Kellanova, effective May 9.  

Hotels, restaurants, and leisure

• Chipotle (No. 399) appointed Jason Kidd to COO, effective May 19. Kidd previously served as Global COO of Taco Bell. Chipotle’s COO role has been vacant since former COO Scott Boatwright was promoted to CEO last year.

Household products

• Kimberly-Clark (No. 198) promoted Russ Torres to the previously vacant role of President and COO, effective May 6. Torres previously served as President, North America at the company.

Source: S&P Global Market Intelligence