Berkshire Hathaway Inc.’s Warren Buffett and Blackstone Group LP’s Tony James, two of Hillary Clinton’s most high-profile supporters in the world of finance, will gather at a fundraiser in New York this month to support the Democratic Party, according to people familiar with the event.

Attendees will pay $33,400 to the Hillary Victory Fund, according to the people, who asked not to be identified because there was no public announcement of the event.

Buffett and James, the president of New York-based Blackstone, are among business executives who have been vocal about their support for Clinton, the former U.S. secretary of state. Buffett, the second-richest man in the U.S., has long backed Democrats and called for higher taxes on billionaires like himself.

Clinton “has a vision for America that’s very similar to mine, in terms of everybody being included in the prosperity we enjoy,” Buffett told Bloomberg’s David Westin in a televised interview in September.

Buffett has donated to Democratic candidates in the past and is scheduled to appear with Clinton at a Dec. 16 rally in his hometown of Omaha, Nebraska. He didn’t immediately return a message left with an assistant. Blackstone’s Peter Rose declined to comment.