Aon's Potential $17 Billion Deal for USI Insurance: What's at Stake
Aon is closing in on a deal to buy USI Insurance Services for roughly $17 billion, a price that would fold one of the largest U.S. insurance brokerages into Aon's already sprawling global platform. If the figure holds, it would mark nearly a fourfold increase over the $4.3 billion valuation USI carried when KKR and CDPQ bought the firm from Onex Corp in 2017 (Reuters).
That 2017 transaction, known as a take-private deal because it removed USI from public markets, valued the brokerage at $4.3 billion including debt (Reuters). KKR, a major private equity firm, partnered with CDPQ, a Canadian pension fund manager, on the purchase. Onex Corp, the previous owner, exited entirely. USI is headquartered in the U.S. and runs more than 140 local offices covering every state, generating over $1 billion in annual revenue (Financier Worldwide).
In September 2023, KKR put more than $1 billion in additional equity into USI, making it the company's largest shareholder (Reuters). That move, called a recapitalization, reshuffled the ownership structure by tightening KKR's grip relative to CDPQ's stake. CDPQ remained a significant shareholder after KKR's larger position (La Caisse).
The jump from a $4.3 billion valuation in 2017 to a reported ~$17 billion negotiation today implies a dramatic expansion in how the market values USI relative to its revenue. Using the $1 billion revenue figure, the 2017 deal priced USI at roughly 4.3 times revenue. A $17 billion price tag implies about 17 times revenue, assuming revenue has stayed flat. Whether that assumption holds matters: if USI has grown its top line through acquisitions or organic expansion under KKR's ownership, the actual revenue multiple could be lower than the headline math suggests. The verified facts do not include an updated revenue figure.
The broader context here is the continuing consolidation of the middle-market insurance brokerage sector. Private equity firms have spent the past decade buying up brokers like USI, layering on smaller acquisitions — known as bolt-on deals — to build national-scale platforms from distributed local-office models. The economics explain the appeal: insurance brokers earn recurring commission income, need relatively little capital on their balance sheets, and scale efficiently once integrated. That combination has made insurance distribution one of the most active private equity hunting grounds in recent years.
For KKR and CDPQ, a sale near $17 billion would lock in a substantial return on a holding period approaching nine years. KKR's 2023 recapitalization, in which it deployed over $1 billion to become the top shareholder, may have served partly as a liquidity mechanism for existing investors or as a governance repositioning ahead of an eventual exit. The timing of that investment — three years before Aon's approach — fits the pattern of an owner preparing an asset for sale.
For Aon, acquiring USI would add a U.S.-focused middle-market brokerage with 140 offices and a national footprint to a portfolio built around large-account commercial broking and reinsurance distribution. The strategic logic centers on cross-selling to USI's client base, capturing operational synergies, and gaining share in the middle market, where Aon's existing platform may be underpenetrated. Antitrust scrutiny would likely center on geographic and product-line overlaps, particularly in regions where both firms have significant commercial lines operations.
The deal has not been finalized. The roughly $17 billion figure and Aon's involvement reflect a negotiation in progress, and the final price, structure, and timing remain subject to change. What is verifiable is the ownership history: Onex sold USI to KKR and CDPQ for $4.3 billion in March 2017, KKR deepened its position with a $1 billion-plus equity investment in September 2023 to become the largest shareholder, and USI operates a national brokerage platform generating over $1 billion in revenue across 140 offices. If the Aon discussions culminate in a signed agreement, the transaction would rank among the largest insurance brokerage deals on record and a defining liquidity event for KKR's private equity portfolio.
