Warren Buffett — $145 Billion

At 94 years old, Warren Buffett remained one of the world's wealthiest people with a net worth of approximately $145 billion, driven by Berkshire Hathaway's vast portfolio of insurance, energy, railroad, and consumer companies. Buffett's announcement in May 2025 that he would step down as CEO of Berkshire Hathaway and hand the role to Greg Abel was the defining corporate succession story of the year. He pledged to continue donating the majority of his wealth to the Bill and Melinda Gates Foundation.