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Aon plc Global Media Relations Aon To Acquire USI To Establish The Premier U.S. Middle - Market Platform • Builds on the successful acquisition of NFP to advance leading platform in the large and growing U.S. middle market • Extends Aon's differentiated capabilities to provide better choice , superior solutions and greater value for clients • Expands Aon's access to the Excess & Surplus ( E & S ) segment , among the fastest - growing areas in U.S. commercial insurance • Enhances Aon's industry - leading data platform , deepening its context advantage • Following the close of the transaction , USI Chairman and CEO Mike Sicard will serve as President of Aon plc and global CEO of Middle Market for the firm • Purchase price of $ 17.0 billion ; transaction expected to deliver $ 395 million in annual run - rate net adjusted EBITDA impact from revenue and cost synergies across the combined middle - market platform and to be accretive to adjusted EPS in 2028 • Aon to host conference call to discuss transaction on August 31 , 2026 , at 8:00 AM ET DUBLIN , Aug. 31 , 2026 / PRNewswire / -- 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 . " In a time of rising complexity and volatility , creating better outcomes for clients across their risk and people challenges requires a combination of capabilities and expertise supported by proprietary data , analytics and technology , " said Greg Case , President and CEO of Aon . " Through the successful execution of our 3x3 Plan to accelerate our Aon United strategy , we have significantly strengthened our firm to build the industry's most differentiated model : what we call our context advantage . " Case added : " Combining with USI will establish the premier U.S. middle - market platform , deepen our context advantage and position Aon to accelerate organic growth . Building on the success of our acquisition of NFP , USI will substantially enhance our middle - market footprint and expand access for our firm in the E & S segment to deliver content , capabilities and expertise to a broader client base , while enabling client leaders to expand relationships and win new business . Our combined data platform will generate richer insight , advance the development of innovative , Al - driven solutions and expand the universe of insurable risk , while further reinforcing the context advantage that differentiates Aon . For nearly two decades , Mike Sicard has built and led a high - performing and integrated team , and I am excited about the opportunities we will create together for our clients , colleagues and shareholders . " Following the close of the transaction , USI Chairman and CEO Mike Sicard will serve as President of Aon plc and global CEO of Middle Market , reporting to Case , and join the Aon Executive Committee . " Joining Aon represents a truly energizing next chapter for our firm and an opportunity to accelerate our momentum as part of the Aon United platform , " said Sicard . " Our firms share strong , one - firm cultures with a deep commitment to working together to bring the best of our capabilities to clients . I look forward to