Warren Buffett is a world-famous investor and CEO of conglomerate Berkshire Hathaway, which includes companies as diverse as Kraft Heinz, Geico Auto Insurance, and Benjamin Moore Paints. Buffett plans to give away 99% of his wealth and has already donated over $3 billion to the Bill and Melinda Gates Foundation.

List and discuss three other well-known corporate philanthropists, their goals, and their causes.