Fortune 500 companies disclosed a fresh round of senior leadership changes between Aug. 1 and Aug. 7, 2026, spanning energy, consumer goods, health care, industrials, materials, retail, technology and wholesale distribution. The moves included CEO, CFO, COO, CHRO and technology appointments, along with retirements, transitions and newly created executive roles. ConocoPhillips promoted CFO and EVP of Strategy and Commercial Andy O’Brien to President and CEO effective Sept. 1, with Ryan Lance retiring and moving to transitional executive chair. Steel Dynamics appointed Theresa Wagler CEO effective Jan. 1, 2027, succeeding cofounder Mark Millett, who will become executive chairman. Other notable changes included Zoetis naming James “Jay” Saccaro to a combined EVP, CFO and COO post, Best Buy appointing Anne Bramman as EVP and CFO, and W.W. Grainger saying CFO Deidra Merriwether will depart to become President and COO at Arrow Electronics. Several companies paired leadership changes with succession plans. Emerson Electric elevated Rudy Sengupta to Chief Technology and AI Officer, a role that highlights the growing importance of AI oversight in industrial companies, while CarMax disclosed the planned exit of Diane Cafritz and a follow-on consulting agreement. The roundup, sourced from S&P Global Market Intelligence, reflects how large U.S. companies are rotating senior finance, operations, technology and people leaders as they prepare for upcoming strategic transitions.