Moodys CorporationMoody's shifted Aon's outlook to stable, citing leverage and integration concerns.
Aon's largest-ever acquisition, the $17 billion purchase of USI Insurance Services from KKR, will add $17 billion in borrowed funds and delay earnings benefits, with the net purchase price coming to $16.7 billion after accounting for certain tax attributes. The deal, announced on August 31, 2026, is the second multibillion-dollar middle-market insurance acquisition Aon has pursued in three years, following its $13 billion purchase of NFP in 2024. Aon plans to issue $17.5 billion in new debt, including a $4 billion term loan and $13.5 billion in senior notes, which will push leverage to an estimated 4.8 times adjusted EBITDA at closing, nearly double the 2.8 times ratio before the announcement. S&P Global Ratings revised Aon's outlook to negative, while Moody's shifted to stable, citing leverage and integration concerns. The deal will freeze share buybacks, and Aon expects the acquisition to become accretive to adjusted earnings per share only in 2028, implying dilution through 2027. USI, the tenth-largest U.S. insurance broker with about $3 billion in annual revenue, gives Aon access to the middle-market commercial insurance segment, estimated at over $40 billion, and combined with NFP, the platform is expected to generate $6.5 billion in revenue.
Moodys CorporationMoody's shifted Aon's outlook to stable, citing leverage and integration concerns.
S&P Global IncS&P Global Ratings revised Aon's outlook to negative on leverage and integration concerns.
Aon PLC$17B USI acquisition adds $17.5B debt, pushes leverage to ~4.8x, freezes buybacks, and delays EPS accretion to 2028.
KKR & Co. Inc.KKR is the seller of USI Insurance Services in the $17B deal, realizing an exit.
USI is the target being acquired by Aon for $17B; no independent directional impact stated.