Billionaire George Soros contributed $6 million to a super-PAC supporting Hillary Clinton
Hillary Diane Rodham ClintonFive takeaways from the vice presidential debate Trump campaign dialing back ads in Midwest states: report Hillicon Valley: Facebook to label posts if candidates prematurely declare victory | Supreme Court hears landmark B Google, Oracle copyright fight | House Dem accuses Ratcliffe of politicizing election security intel MORE last month, according to the committee's latest financial statement.
The investor has now contributed a total of $7 million in this election cycle to Priorities USA Action, which raised $41 million on behalf of Clinton in 2015.
In the last 6 months, the super-PAC raised $25.3 million, meaning that Soros's contribution accounted for almost a quarter of its fundraising haul.
Also making large contributions to the committee in 2015 were media mogul Haim Saban and his wife Cheryl, who gave a total of $5 million, philanthropist Laure Woods, who gave $2.3 million, and investor Donald Sussman, who contributed $2.5 million.
This group, along with Soros, accounted for two-fifths of Priorities total fundraising in 2015.
Soros, a longtime Democratic donor, was a fundraising force for John Kerry
John Forbes KerryOVERNIGHT ENERGY: Biden would face hurdles undoing Trump environmental rollbacks | Biden team weighs climate 'czar': report | Donald Trump Jr. urges hunters to vote for his father Biden team weighs climate 'czar': Politico Mellman: Do debates matter? MORE's 2004 presidential run.
He also gave a million to Priorities in 2012 when it was supporting President Obama's reelection campaign.
However, emails released by the State Department last month showed that he has since soured on the president and regrets not backing Clinton's primary campaign in 2008.
Clinton was told by a former campaign aide that Soros appreciated the former secretary of State's willingness to meet with him.
Neera Tanden, now head of the liberal Center for American Progress emailed Clinton, "I told him I worked for you in the primaries and he said he's been impressed that he can always call/meet with you on an issue of policy and said he hasn't met with the President ever (though I thought he had)."
--This report was updated at 7:48 p.m.