Aon plc (NYSE:AON), a leading global professional services firm, today announced the signing of a definitive agreement to acquire USI from KKR and other shareholders for a total purchase price of $17.0 billion. The transaction establishes the premier platform in the large and growing U.S. middle-market segment, building on the success of Aon's acquisition of NFP in 2024.

USI, a leading provider of property & casualty, employee benefit, personal risk and retirement solutions for the middle market, is the tenth largest U.S. insurance broker with approximately $3 billion in annual revenue and more than 10,500 team members across nearly 200 U.S. offices. Powered by its proprietary USI ONE® platform for analytics, networked resources and strategic planning to inform and advise clients, USI is highly complementary with Aon's one-firm, Aon United strategy and global Aon Business Services operating and technology engine.