Aon Increases Debt for USI Insurance Acquisition

The firm issued $13.5 billion in notes to finance the $17 billion deal for USI Insurance Services.

Updated on Oct. 28, 2026 in Corporate Finance

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Aon issued $13.5 billion in notes to finance its $17 billion acquisition of USI Insurance Services, signaling a major shift in capital allocation. AI Illustration. Upload story photo >

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As of September 30, 2026, Aon increased its long-term debt by $11.66 billion to fund the $17 billion acquisition of USI Insurance Services. The company has suspended share repurchases to focus on repaying the debt and achieving a target leverage ratio.

Why it matters

The debt issuance reflects a major shift in capital allocation as Aon prioritizes expansion through the USI acquisition over shareholder returns. The firm aims to reach a leverage ratio of 2.8x-3.0x within two years of closing the deal.

Aon issued $13.5 billion in senior notes across seven tranches during September 2026 to support the acquisition. The company recorded $1.94 billion in free cash flow for the first nine months of the year.

The players

Aon

Aon is a global professional services firm providing risk, retirement, and health solutions to clients worldwide.

USI Insurance Services

USI Insurance Services is a provider of property and casualty insurance, employee benefits, and personal risk solutions.

S&P Global

S&P Global is a financial services company that provides credit ratings and data analytics for the global capital markets.

Fitch

Fitch Ratings is a credit rating agency that evaluates the creditworthiness of companies and government entities.

The details

Aon funded the transaction by issuing senior notes while continuing its Accelerating Aon United restructuring program, which incurred $93 million in third-quarter charges. While the deal is expected to dilute adjusted earnings per share in 2027, the company anticipates the acquisition will become accretive by 2028.

Timeline

  1. September 30, 2026, was the date long-term debt reached $26.32 billion.

  2. The USI acquisition is expected to close before the end of 2026.

  3. The acquisition is projected to dilute adjusted earnings per share in 2027.

  4. The deal is expected to become accretive in 2028.

Market Landscape

This aggressive acquisition strategy follows a pattern of corporate consolidation within the insurance brokerage industry. By leveraging its balance sheet for the USI deal, Aon seeks to outpace rivals while managing the impact of its restructuring program on operating margins.

Shareholders will see a temporary halt in share repurchases as the company redirects cash flow toward debt repayment. Clients may experience changes in service integration as Aon balances cost-reduction efforts with the new acquisition.

The takeaway

Aon is signaling a transition toward long-term growth through major acquisitions despite the short-term impact of increased debt levels. Investors and stakeholders should monitor the firm's leverage ratio and restructuring progress as key indicators of the company's financial health.

Further reading

For more on industry shifts, explore our Corporate Finance section.

Source note: This article includes information reported by Insurance Business.

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