Billionaire George Soros contributed $6 million to a super-PAC supporting Hillary ClintonHillary Rodham ClintonClinton thanks protesters ahead of women’s march Pro-choice feminists can't take women's rights hostage Thousands expected for women's march Saturday MORE last month, according to the committee's latest financial statement.
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 KerryJohn KerryTrump fails to mention Clinton in inaugural address Hillary Clinton under microscope at inauguration Overnight Tech: Meet the key players for Trump on tech | Patent chief staying on | Kerry aide goes to Snapchat | Uber's M settlement 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.