Aon CEO Greg Case warned that clustering billions of dollars of equipment in a small number of AI data center locations could make projects difficult to insure and cut off access to debt financing, as the company reported record demand for specialized coverage in its third-quarter earnings.
The race to build artificial intelligence infrastructure is generating insurance risks large enough to reshape how developers finance data centers, Aon CEO Greg Case said Wednesday, warning that clustered facilities could become too risky to insure under existing market structures.
Case made the remarks in an interview with CNBC, saying that concentrating billions of dollars of equipment in a small number of locations was straining the insurance industry's capacity to absorb potential losses.
"If you create them and you build them on top of each other, you've created concentration risk in a way in which it makes it more difficult to get insurance," Case said. "If it's more difficult to get insurance, that means the financing structure is going to change completely. You can't access the debt markets."
The financial exposure from operational disruptions alone is substantial, according to Case. "Data centers are literally going to measure business interruption at millions of dollars per minute," he told CNBC.
Aon's third-quarter earnings, released alongside the interview, reflected the growing demand for specialized coverage. The company reported a record pipeline of data center projects, contributing to 7% organic revenue growth in its commercial risk business during the quarter. Adjusted earnings per share rose 10% to $3.36, while adjusted operating margin expanded 70 basis points to 27%.
To address the surge in demand, Aon has established specialized insurance facilities — pooled capacity vehicles targeting specific industries or risk categories. Those include a $10 billion data center facility and a $2.5 billion energy facility.
Case said Aon is working directly with developers during the design and siting phases of projects, before any policy is written. "These are engineering conversations around understanding risk," he said.
The capacity constraints extend beyond property coverage. Case estimates the global insurance industry holds roughly $4.5 trillion in capital and believes that figure must expand significantly to keep pace with cyber, AI infrastructure, and other emerging risk categories. "Call it 5 trillion to 10 to 15 trillion," he said, elaborating on comments from the company's second-quarter earnings call.
His strategy for closing that gap involves drawing in institutional investors, pension funds, sovereign wealth funds, and wealthy individuals — sources Case estimates represent approximately $250 trillion in total capital. He described Aon's evolving role as going beyond traditional brokerage. "Not just being a market taker or market optimizer for our clients, but a market maker creating new markets to sort of drive and address risk," he said.
The insurer's expansion plans also encompass a pending $17 billion acquisition of USI Insurance Services, expected to close in the fourth quarter. The deal will combine USI with Aon's existing operations and NFP — which Aon acquired in 2024 — forming a roughly $6.5 billion middle-market platform. Aon expects the combination to generate $395 million in annual earnings benefits, comprising $280 million in cost savings and $115 million in revenue synergies. The acquisition will be debt-financed, with the company prioritizing leverage reduction over the following two years.
Case also pointed to AI's dual role in the cybersecurity insurance landscape. Researchers disclosed two critical vulnerabilities in PHP — a programming language used by roughly 70% of websites — on October 21. The flaws could allow attackers to remotely execute malicious code on vulnerable servers without authentication. AI tools from cybersecurity firms Calif and Google's Wiz, along with OpenAI, played a significant role in identifying and analyzing those vulnerabilities.
Asked whether cyber risks are outpacing the industry's ability to respond, Case acknowledged the pressure. "We have to keep up. We have to continue to evolve," he said.
The combination of rising AI infrastructure investment, growing cyber exposure, and limited traditional insurance capacity signals a period of structural adjustment for the industry — one in which alternative capital sources and specialized underwriting facilities are likely to play an increasingly central role.
Jay Goldberg is a staff writer at TechEchelon covering technology, markets, and policy. He files the breaking news and deal coverage that move the publication's core desks.
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