What Businesses Does Bill Gates Own? Inside His Foundation's Major Holdings

With an estimated net worth surpassing $100 billion, Bill Gates remains among the world’s wealthiest individuals. While most of his fortune came from Microsoft’s explosive growth, his investment strategy—particularly through the Bill & Melinda Gates Foundation—reveals a fascinating portfolio that extends far beyond technology. The question of what businesses Gates owns through his foundation provides valuable insights into how one of the world’s smartest investors thinks about long-term value creation.

Although Gates doesn’t directly manage the foundation’s day-to-day portfolio, his influence over its holdings is substantial. The foundation’s top five positions paint a revealing picture of where Gates believes value lies—and some of these business investments might genuinely surprise you.

Microsoft Still Dominates Gates’ Business Empire

The foundation’s number one business stake remains unsurprising: Microsoft, valued at approximately $15 billion and representing roughly one-third of the entire portfolio. Gates founded the technology giant in 1975, building his fortune primarily on this original position. While he’s gradually reduced his stake over decades, the company’s dominance in the foundation’s holdings underscores Gates’ enduring confidence in the business.

Berkshire Hathaway: A Vote for Warren Buffett’s Business Philosophy

The second-largest position reveals something more intriguing: Berkshire Hathaway, worth around $10 billion—approximately 20% of the portfolio. This investment reflects more than just financial calculation; it demonstrates Gates’ profound respect for Warren Buffett and alignment with his business principles. The two billionaires have maintained a deep friendship for decades, and Gates’ substantial bet on Buffett’s holding company signals trust in this particular business approach, which has proven remarkably resilient across market cycles.

The Industrial Business Strategy: Moats and Durability

The remaining three positions complete a picture of Gates’ business philosophy: Waste Management, Canadian National Railway, and Caterpillar. The heavy concentration in industrial businesses might seem surprising for a technology pioneer, but it reveals a sophisticated investment strategy. Each company operates with strong competitive moats—meaning they possess the distinctive business advantages that make them difficult for competitors to displace. These are companies with entrenched market positions, valuable brand recognition, and resilient business models.

What ties this portfolio together isn’t sector—it’s the quality of the underlying business. Gates appears to be following a principle that Buffett has long championed: investing in businesses with sustainable competitive advantages, regardless of industry.

Diversification Within Conviction

The foundation maintains nearly two dozen positions beyond these top five, indicating a disciplined approach to diversification. Yet these five businesses tell the core story of where Gates concentrates his largest bets. They represent a blend of technological innovation, financial acumen, and industrial durability—three pillars that define his long-term investing philosophy. Understanding what businesses Gates owns through his foundation offers a masterclass in how elite investors approach portfolio construction: seeking economic moats, respecting proven business models, and maintaining conviction in quality companies across economic cycles.