Mirror Review Magazine
August 31, 2026
The Aon acquisition of USI Insurance is nearing an agreement valued at about $17 billion, including debt, as Aon looks to expand its presence in the U.S. middle-market insurance business. The proposed deal would see Aon acquire USI from private equity firm KKR if negotiations are completed successfully. USI generates roughly $3 billion in annual revenue, putting the reported transaction value at about 5.7 times its annual sales.
The potential transaction would give Aon a larger platform in the U.S. middle market, where businesses use insurance, employee benefits and risk-management services.
Aon Acquisition of USI Insurance Expands Middle-Market Reach
The Aon acquisition of USI Insurance would add a major U.S. insurance brokerage platform to Aon’s existing operations.
USI Insurance Services, headquartered in Valhalla, New York, reports approximately $3 billion in revenue and more than 10,500 professionals across nearly 200 offices in the United States. The company provides property and casualty insurance, employee benefits, personal risk, retirement, program and specialty solutions.
USI’s USI ONE Advantage combines analytics, network resources and strategic planning to develop risk-management and benefits solutions for clients.
The scale gives Aon an established network across the U.S. middle market if the transaction moves forward.
Why Aon Is Pursuing USI
The proposed $17 billion deal follows Aon’s earlier expansion in the middle-market insurance sector.
Aon completed its NFP acquisition in 2024 in a transaction valued at approximately $13 billion. NFP provides property and casualty insurance, employee benefits, wealth management and related services, with a focus on individuals and middle-market businesses.
USI would add another established brokerage network to that business. Its local offices and commercial insurance and benefits capabilities could complement Aon’s broader risk and consulting operations.
KKR Acquired USI for $4.3 Billion in 2017
KKR has owned a major stake in USI since 2017, when KKR and Canadian pension investor Caisse de dépôt et placement du Québec (CDPQ) acquired the company from Onex for approximately $4.3 billion, including debt.
KKR later increased its investment and became USI’s largest shareholder. The private equity firm has invested more than $1 billion in USI since the original acquisition.
The reported $17 billion transaction value is therefore substantially higher than the value assigned to USI when KKR and CDPQ acquired the company. If completed, the sale would represent a major exit for KKR while giving Aon greater scale in insurance brokerage.
What the $17 Billion Deal Means for Insurance Brokerage
The proposed transaction would add another large platform to the ongoing insurance brokerage consolidation among major industry players.
USI already provides services across several areas:
- Property and casualty insurance
- Employee benefits
- Personal risk
- Retirement solutions
- Risk management and consulting
For middle-market companies, bringing USI into Aon could provide access to a broader combination of insurance, analytics and consulting capabilities through a larger brokerage network.
The USI Deal Remains Under Negotiation
The Aon acquisition of USI Insurance has not yet been completed. Current reporting indicates that Aon and KKR are close to an agreement, with an announcement possible as soon as August 31 if negotiations are successfully concluded.
The reported $17 billion figure includes debt, while final transaction terms would depend on the definitive agreement.
The proposed transaction could also increase Aon’s earnings per share as early as 2028, according to current reporting.
Aon’s USI Deal Builds on Its Middle-Market Strategy
The Aon acquisition of USI Insurance would give Aon another significant U.S. middle-market platform alongside its existing operations and the NFP business.
USI’s approximately $3 billion revenue base, national office network and broad range of insurance and benefits services would expand Aon’s reach if the transaction closes.
The immediate focus remains on whether Aon and KKR finalize the reported agreement. If they do, the $17 billion deal would become one of the largest recent transactions in the insurance brokerage sector and mark another significant step in Aon’s U.S. middle-market expansion.
Gurushanth S Jatti
