Earlier this month the FreeBSD Foundation received a $500,000 donation from the founder of WhatsApp, Jan Koum. That's on top of Koum giving one million dollars to FreeBSD back in 2014.
Announced today was another $500,000 USD donation. Though this time the big ticket donor is remaining anonymous.
What they call as a "Uranium level" donation is $250,000 USD or more. The only two donors at this level were Jam Koum's $500k donation and this anonymous donation. A list of FreeBSD's 2016 donors can be found here. This year the foundation received $1,509,493 of their $1,200,000 goal.