A source familiar with the group's fund-raising plans told CNN on Sunday that the group has brought on board a national finance director and is assembling a team of regional fund-raising leaders.
Matt Felan, the deputy national finance director on Clinton's 2008 presidential bid, will lead the group's fund-raising. The regional fund-raisers will have ties to past top donors to Clinton, the source said.
"Few people understand the Clinton donor network better than Matt," the source said. "He is making calls and has received widespread positive response. Checks are starting to come in the door. Money shouldn't be a problem."
The source added that several bundlers who aided Clinton in 2008 had already donated to this super PAC. Bundlers pull together individual donations to bring in the huge sums campaigns need.
Clinton's 2008 campaign raised $220 million in donations, according to Federal Election Commission records.
She has largely stayed out of the spotlight since stepping down from her State Department post in early February, though she has released a video announcing her support for same-sex marriage and will speak this week at the annual Women in the World Summit in New York.
- CNN's Gregory Wallace and Paul Steinhauser contributed to this report