A new super PAC supporting former President Donald J. Trump has $27 million in cash on hand, two days after the group held its first event with Mr. Trump ahead of the November election, according to an official with the group.

The super PAC, Right for America, raised $13.05 million during the first fund-raising quarter of the year, the official said. An additional $12 million was raised in connection with the event, and $2 million more was raised this month.

“We are thrilled by the support we have gotten in the few weeks we have been around,” said Lee Rizzuto, Right for America’s treasurer. “We look forward to doing our part in making sure Donald Trump is returned to the White House.”

The biggest donor to the group is Isaac Perlmutter, the former Marvel Entertainment chief executive who has been involved since the group formed weeks ago. Mr. Perlmutter and his wife, Laura, donated $10 million, a person familiar with the amount said.

Right for America held its first event on Tuesday night, with a dinner of roughly 25 people at Mar-a-Lago, Mr. Trump’s private club and residence in Palm Beach, Fla. The group is planning another fund-raising dinner soon, but is not expected to start spending until closer to the general election in November.

Among those who attended the dinner was Kimberly Guilfoyle, the fiancée of Donald Trump Jr., who helped bring some of the people to the gathering, according to a person familiar with the event.

The group is led by Sergio Gor, a longtime Trump associate who has published Mr. Trump’s two post-White House books. It is the second super PAC supporting Mr. Trump after Make America Great Again Inc., which has been the main outside group backing the former president since he declared his third candidacy for president in November 2022.

Mr. Perlmutter, an old friend of Mr. Trump and a member of Mar-a-Lago, had been interested in going through a different entity to support the presumptive Republican presidential nominee.