Humana taps Amazon executive to head insurance unit as veteran retires Reuters Tue, December 16, 2025 at 8:13 PM GMT+5:30 HUM AMZN Dec 16 (Reuters) - Humana (HUM) said on Tuesday that George Renaudin will step down as president of its insurance segment and named Amazon healthcare (AMZN) executive Aaron Martin as his successor. Renaudin, who played a pivotal role in establishing and growing the Medicare Advantage and Medicaid programs, will retire next year after a 29-year career at the company, the U. S. health insurer said.