Warren Buffett is an American business magnate, investor, and philanthropist. He is considered one of the most successful investors in the world, having consistently ranked among the wealthiest people globally with a current net worth of $58.5 billion. Buffett is known for his value investing philosophy and being a long-term investor in companies. In addition to his business success, Buffett has pledged to give away 99% of his fortune to philanthropic causes through the Gates Foundation.