Aon is diving deeper into the U.S. midmarket.

Aon is nearing a roughly $17 billion deal, including debt, to acquire insurance brokerage USI from KKR, the Journal reported.

Aon is close to finalizing a $17 billion deal to acquire insurance broker USI from KKR, with an announcement potentially expected as early as Monday, WSJ reports.

Aon will purchase rival USI Insurance Services for seventeen billion dollars. This acquisition aims to strengthen Aon's position in the middle-market segment. The deal highlights…