This key supplier for various industries has generated over 90,000% returns over its lifetime.Legendary investor and billionaire Warren Buffett runs Berkshire Hathaway (BRK.A) (BRK.B 0.41%), one of the world's largest holding companies. Buffett is famous for his longtime investments in famous consumer-facing companies like Coca-Cola, Apple, and American Express. However, Buffett has made it a point to reduce his broad stock exposure over the past several quarters, raising Berkshire's cash position to a reco ...