Though Buffett spends frugally, he gives generously. In 2010, he teamed up with Bill and Melinda Gates to form The Giving Pledge, an initiative that asks the world's wealthiest people to dedicate the majority of their wealth to philanthropy.
As of June 2016, more than 154 affluent individuals have signed the pledge, including Michael Bloomberg, Mark Zuckerberg, and Larry Ellison.