Age: 47
Net Worth: $1.2 billion
Total amount of assets: $11.0 billion
Now perhaps known greatest as the hedge fund guy who has issues with Herbalife, William Ackman is founder and CEO (Chief Executive Officer) of Pershing Square Capital Management. He’s an active investor. He’s also very active in philanthropy. Organizations to which he’s made donations include Signature Theater, Human Rights Watch (to which his wife, Karen Ann Herskovitz, is a trustee), One Acre Fund, and Social Finance. He’s also signed The Giving Pledge, committing himself to give away at least 50% of his wealth to charity.