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.

Warren Buffett donated on Friday another $6 billion of Berkshire Hathaway stock to the Gates Foundation and four family charities, his biggest annual donation since he began giving away his fortune nearly two decades ago.

W arren Buffett is making his annual donation of Berkshire Hathaway stock to five philanthropies, giving $6 billion in shares to the organizations with the bulk going to the Gates Foundation, according to a press release early Friday evening.