ranking second was john santicos, who ran a texas theatre chain and left about 600 million to a foundation after his death and michael bloomberg, the billionaire former mayor of new york and possible presidential candidate ranked third with 510 million. bill and melinda gates topped the list with their $1.9 billion gift to their foundation, but gave away another 272 million in mark mark zuckerberg and his wife made the most public pledge of 2015, vowing to give ut% of their facebook shares to an llc, but that was a promise, not a gift and the lly was not technically a charity. it took $32 million to be a top 50 giver that's career, is whether weak stock markets and falling tech fortunes will cause aing bigger drop in 2016. for nightly business report, i'm robert frank. >> still a lot of money. >> still a lot of money to give away. america's pretty generous overall. >> absolutely. that does it for nightly business report. thanks for watching. >> have a great evening, everybody and we will see you back her. announcer: tonight on "revolutionaries"... padua: the thing is, when you're writing a