GREG ZIMMER
CEO
ALLIANT INSURANCE SERVICES INC.
WHY: Almost 30-year finance exec running OC’s largest insurance broker, U.S.’s fifth biggest, with companywide revenue approaching $5B in 2024.
IN THE NEWS: Named CEO of Alliant in January, taking over for Tom Corbett, who is now executive chairman.
NOTABLE: Joined Alliant in 1998 as CFO and became president in 2007, where he engineered firm’s explosive growth by overseeing the acquisition of more than 100 companies.
QUOTABLE: “If you’re going to transform a business [by] entering new markets, whether it’s a new geography or a new product, you’re not doing that from scratch often. You identify an opportunity then go and find the best platform out there to build it.”
