Blackstone Inc. and Aon Plc set up Lloyd’s vehicle Cortina

By Daniel Okafor

Blackstone Inc. and broker Aon Plc set up Cortina, a Lloyd’s of London syndicate that will take 3% of qualifying property reinsurance and 5% of other eligible Aon deals.

Blackstone Inc., the world’s largest alternative asset manager, is moving deeper into insurance through the arrangement. Cortina plans to begin underwriting on Jan. 1, subject to final Lloyd’s approval.

What does Cortina underwrite?

A Friday statement said Cortina will provide capital to back reinsurance contracts. Its participation differs by contract type:

• 3%: Aon-arranged contracts covering insurers’ property portfolios once catastrophe losses exceed an agreed threshold.
• 5%: all other eligible reinsurance deals facilitated by Aon.

QBE will be responsible for the syndicate’s underwriting and governance. The division keeps underwriting and risk oversight with the insurance group.

Blackstone President and Chief Operating Officer Jon Gray said the partnership “will broaden the pools of capital available to the reinsurance market, expanding capacity and strengthening resilience across market cycles.”

The arrangement works like a funding sleeve rather than a direct insurance policy. Aon arranges the contracts. Blackstone supplies the capital. QBE runs underwriting and governance. Each company controls a separate part of the risk-transfer chain.

Why are alternative asset managers entering P&C insurance?

Alternative asset managers such as Blackstone have long sought life insurance business. They now push more deeply into property-and-casualty, or P&C, insurance.

The sector offers a different earnings profile. Aon said P&C insurers and reinsurers generated an average 17% return on equity in 2025, following years of price increases. Aon also noted that global commercial insurance rates have fallen in recent quarters.

The combination sets a mixed entry point for new capital. Cortina arrives after years of price increases, while recent rate declines mark a softer market. The sector still generated a 17% average return in 2025.

The attraction also rests on the underlying economics. Gains and losses tend to be uncorrelated with wider financial markets. Insurers profit when premiums exceed claims, then invest those premiums before paying claims.

That sequence gives insurers two earnings levers: underwriting and investment. It also gives alternative managers exposure to a cash-flow profile that need not move with public markets. For Blackstone, P&C expands the range of insurance risk available for institutional capital.

How does Cortina fit Blackstone’s Lloyd’s expansion?

Lloyd’s of London is the world’s biggest hub for commercial and specialty risk. Last year, Allianz SE and Oaktree Capital Management set up a reinsurance syndicate there.

Blackstone already backs a Lloyd’s reinsurance syndicate that takes on part of American International Group Inc.’s risks. In 2025, Blackstone said it would also back a new Lloyd’s syndicate that The Fidelis Partnership, a Bermuda-based insurance underwriter, would run.

Aon Chief Executive Officer Greg Case said: “As risks grow in scale and complexity, clients are looking for effective risk transfer solutions that consider all forms of available capital.”

Cortina extends that push through a three-party structure. Aon facilitates the contracts. Blackstone provides the capital. QBE is responsible for underwriting and governance. Each partner retains a distinct role in the risk-transfer chain.

The structure follows other recent uses of Lloyd’s by insurers and investment managers. It also gives Aon another route to bring third-party capital into the contracts it arranges.

The immediate condition remains final Lloyd’s approval. The next checkpoint comes before the planned Jan. 1 start. If approved, Cortina will activate a vehicle designed to widen capital for catastrophe-related and broader reinsurance risk.