According the Federal Election Commission reports, the Sabans made their contributions on March 16.
Last year, the Sabans each gave $2.5 million to the SuperPAC.
The FEC reports for the month of March were due on Tuesday. Priorities reported raising $11.9 million during the month, and had $44.7 million on hand.
Steven Spielberg and Jeffrey Katzenberg have each given $1 million to Priorities, and Katzenberg has been lining up donors to the group. Director J.J. Abrams and his wife each gave $500,000. Other contributors include Jane Fonda, who gave $10,000 in February, and IATSE, which contributed $25,000 that same month.
Saban, Katzenberg and Spielberg were all co-hosts of a fundraiser featuring Hillary Clinton at the home of George Clooney on Saturday. The event raised money for the Hillary Victory Fund, a joint committee of the Clinton campaign, the Democratic National Committee and state party committees.