Alliant Insurance Services Rises to #4 on the Business Insurance Largest U.S. Brokers List
By Alliant / June 30, 2026
Growth driven by organic expansion, strategic investment, and a people-first operating model
IRVINE, CA — Alliant Insurance Services has moved up to the #4 ranking on Business Insurance’s list of the 100 Largest Brokers of U.S. Business and ranks #6 on the World's Largest Insurance Brokers list. Published annually, the rankings recognize the top insurance brokerage firms worldwide based on prior-year revenue.
“Alliant’s continued rise reflects the strength of our people, the depth of our platform, and our ability to deliver specialized solutions at scale,” said Alliant CEO Greg Zimmer. “As we grow, we remain focused on creating an environment where entrepreneurial professionals can do their best work and clients benefit from the full breadth of Alliant’s expertise.”
In addition, Alliant retained the #1 spot on the Largest Privately Owned Brokers list, further underscoring the company’s scale and market position.
Alliant closed 2025 with more than $5.7 billion in revenue and $55 billion in premium and is well positioned to build on this momentum through continued growth, investment, and expansion.
"As our business continues to grow, we remain committed to investing in our people and expanding the capabilities that help our clients navigate an increasingly complex risk environment," Zimmer added. "That commitment will continue to shape our success and create new opportunities for the future."