Warren Buffett has never been one to chase headlines. For most of his career, the 93-year-old billionaire investor has preferred to let his actions—and his annual shareholder letters —do the talking. But even Warren Buffett can’t give away $6 billion in a single day without people noticing.

Billionaire investor Warren Buffett dished out $6 billion in Berkshire Hathaway shares to five charities Saturday, marking his biggest annual donation in nearly 20 years and parting with a portion of his $152 billion estimated net worth.

Warren Buffett will donate about $6 billion of Berkshire Hathaway Inc. shares to five foundations as part of a pledge he made nearly two decades ago.