Real estate and private equity leaders, who have long helped to fill Sinema's campaign coffers, contributed to a healthy cash haul for the senator in the final months of last year.
At the lunch, Sinema discussed the incoming Congress and how the tight margins in both chambers could create gridlock, according to attendees.
Sinema's campaign had already seen more than $2 million from the securities and investment industry since the 2018 election cycle.
The Sinema campaign saw dozens of contributions totaling over $145,000 from people who work at Apollo Global Management, another giant private equity firm, since October.
Suzanne Clark, CEO of the massive pro-business lobbying group U.S. Chamber of Commerce, also donated $1,000 to Sinema's campaign on Dec. 31, the new FEC filing shows.