Aon PLC is on the verge of finalizing a deal valued at approximately $17 billion, including debt, to acquire the insurance brokerage firm USI from private equity firm KKR, according to sources familiar with the matter. The transaction could be announced as early as Monday, the sources indicated.

USI, headquartered in Valhalla, New York, is a specialized insurance brokerage and consulting firm focusing on risk management, employee benefits, and retirement advisory services. Based on its official website, the company generates annual revenues of about $3 billion.

KKR originally acquired USI from private equity firm Onex in 2017, subsequently increasing its stake over time and becoming the company's largest shareholder by 2023. If the acquisition agreement is reached, it would represent another notable exit in a series of high-profile divestments for KKR.

Earlier this year, KKR sold CoolIT, a data center cooling company, as well as Circor's commercial and defense aerospace business. The firm reported record asset sales of $1.29 billion in the quarter ending in June, underscoring its active portfolio management strategy.

The potential acquisition of USI would help the large insurance brokerage and consulting group, valued at $75 billion, expand its footprint in the mid-market corporate segment while potentially boosting its earnings per share as early as 2028, according to the sources.

Aon reported adjusted earnings per share of $3.81 for the second quarter on July 29, surpassing Wall Street analyst expectations. However, since that announcement, the company's stock has declined by 5.6%, closing at $355.40 on Friday.