$4.6 billion, to be exact. According to a Securities & Exchange Commission filing released on Monday and picked up by Bloomberg, Gates donated 64 million shares of Microsoft on June 6. The report notes that this is the billionaire’s largest donation since 2000, when he donated stock valued at $5 billion to create the Bill & Melinda Gates Foundation.

While the SEC filing did not specify the gift’s recipient, it is expected that the money will go to Gates’ charity. The Chronicle of Philantropy estimates that this would bring the total of Gates’ donations to the foundation to more than $18 billion.
Source: Fortune