Aon plc Announces $17B Agreement to Acquire USI Advantage

What Happened Aon plc announced on August 30–31, 2026 that it signed an Agreement and Plan of Merger to acquire USI Advantage Corp. for $17.0 billion in cash (subject to downward adjustments for leakage since June 30, 2026). The Merger Agreement was entered into by Aon, Aon North America, Inc. (the acquirer), Cortlandt Acquisition Corp. (merger sub), USI Advantage Corp., and Uno Aggregator II L.P. (securityholder representative). Completion is subject to customary closing conditions, including required regulatory approvals. Aon filed a press release and an investor presentation on August 31, 2026 announcing the transaction.

Key Details

• Purchase price: $17.0 billion in cash, subject to downward adjustment for leakage since June 30, 2026.
• Agreement date: Merger Agreement dated August 30, 2026; public disclosures filed August 31, 2026.
• Regulatory/closing timeline: Closing requires customary regulatory approvals; either party may terminate if the deal has not closed by 5:00 p.m. NYC on June 1, 2027, subject to up to two successive three‑month extensions tied to regulatory approval timing.
• Other: The Merger Agreement contains customary representations, warranties and covenants; parties are not required to effect completion until October 19, 2026.

Why It Matters This is a material acquisition that expands Aon’s business and could affect revenue mix, market positioning and integration costs. The deal is subject to regulatory approval and customary closing conditions, so completion is not guaranteed and timing could extend into 2027. Investors should note the $17 billion cash consideration, potential adjustments for leakage, and that the company has provided a press release and investor presentation with additional transaction details.