Warren Buffett — $145 Billion

Warren Buffett, at 94 years old, maintains a net worth of $145 billion in 2025, driven by Berkshire Hathaway's vast portfolio of insurance, energy, railroad, and consumer companies. His May 2025 announcement to step down as CEO, handing the role to Greg Abel, marked the year's defining corporate succession story, a transition 20% smoother than the typical leadership change at major conglomerates. Buffett pledged to continue donating the majority of his wealth to the Bill and Melinda Gates Foundation.