His donation, which was made on June 6, was recorded in a filing to the US Securities & Exchange Commission. The filing did not reveal the recipient of the donation, but it seems likely that most, if not all, of it went to the Bill & Melinda Gates Foundation, the charitable organization that Gates and his wife established to oversee their philanthropic efforts around the world. According to Bloomberg, Gates' latest donation is his largest gift of Microsoft shares since 2000, and represents a significant reduction of his stake in the company.