This is Fortune 500 Power Moves, a weekly 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 Aug. 2-8, organized by sector. Titles included in this roundup: CEOs (Chief Executive Officers), CFOs (Chief Financial Officers), COOs (Chief Operating Officers), and CTOs (Chief Technology Officers). We also include CIOs (Chief Information 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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Food, beverages, and tobacco
- Post Holdings (No. 477) announced that Jeff A. Zadoks will retire as EVP and COO, effective Jan. 2, 2026. Zakoks held multiple roles during his 14-year tenure with the company, including CFO from 2014 until 2022, when he became COO. He will be succeeded by Nicolas Catoggio, who is currently and will remain President and CEO of Post Consumer Brands when he assumes the COO title.
Health care
- Guidewell Mutual Holding (No. 136) appointed Brian D. Pieninck as CEO, effective Oct. 1. Pieninck currently serves as President and CEO of CareFirst BlueCross BlueShield and Board Chair of the Blue Cross Blue Shield Association Board of Directors. He will succeed Pat Geraghty, who will retire after 14 years as CEO.
Household products
- Kenvue (No. 281) appointed Michael Wondrasch as Chief Technology and Data Officer, effective Aug. 25. Wondrasch most recently served as EVP, CIO, and Enterprise Head of Shared Services for Avantor. He will succeed Bernardo Tavares, who has held the CTDO role since Kenvue spun off of Johnson & Johnson (No. 48) in May 2023.
Transportation
- Expeditors Intl. of Washington (No. 400) appointed David A. Hackett as CFO, effective Oct. 1. Hackett currently serves as VP, Finance at the company and will succeed Bradley S. Powell, who will retire on Sept. 30 after 17 years in the role.
Source: S&P Global Market Intelligence
