Aon to acquire USI to establish the premier U.S. middle-market platform

▤ Summary

Aon announced a definitive agreement to acquire USI for $17.0 billion. The deal will strengthen Aon's position in the U.S. middle market and expand its reach in the excess and surplus insurance segment. Aon also says the combination will deepen its data and analytics capabilities and support AI-enabled solutions. The transaction is expected to close in the fourth quarter of 2026, subject to regulatory approvals.

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