Sen. Kelly Ayotte, R-New Hampshire, is expected to attend an upcoming fundraiser with GOP donor Paul Singer.
New York CNN  — 

Billionaire investor and major Republican donor Paul Singer will co-host a fundraiser for five female members of Congress in New York City at the end of this month.

According to an invitation shared with CNN, Singer and 20 others will host a lunch for Sens. Kelly Ayotte of New Hampshire and Lisa Murkowski of Alaska, and freshmen Reps. Elise Stefanik of New York, Martha McSally of Arizona and Barbara Comstock of Virginia.

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An invitation to the March 31 “Winning Women 2016” luncheon asks for donations of “up to $5,400 per candidate.”

“In Congress, GOP women comprise only 6% of members compared to the Democrats’ 14%,” the invite reads. “We can and must do better. Re-electing these women to office is an important beginning.”

The invitation refers to Winning Women 2016 as a joint fundraising committee.

Singer adviser Annie Dickerson and investor Chuck Schwab are among the other co-hosts of the event.

Singer, founder of the hedge fund Elliott Management, is one of the most influential and high-profile Republicans donors. He has particularly attracted attention in recent years for his advocacy of LGBT rights, including same-sex marriage, as well as hawkish national security policies.