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.