Aon plc and Blackstone jointly announced the launch of Cortina syndicate 1956, a new Lloyd's reinsurance syndicate managed by QBE, in a press release issued on November 6, 2026.

Key Highlights

  • New syndicate launched: Cortina syndicate 1956 is a Lloyd's reinsurance syndicate formed through a partnership between Aon, Blackstone-managed funds, and QBE as Managing Agent.
  • Lloyd's approval: Cortina received Lloyd's Council's "in principle" approval on 16 October 2026 and is working to complete required steps before underwriting from 1 January 2027.
  • Client dividend: Participating clients will receive a dividend based on Cortina's share of their reinsurance programs, reflecting the syndicate's efficient operating structure.
  • Defined capacity framework: Cortina will write three percent of eligible property catastrophe excess-of-loss treaties and five percent of all other eligible treaties arranged by Aon.
  • Financial strength: Cortina will carry an A+ financial strength rating as a Lloyd's syndicate, with QBE responsible for underwriting and governance.
  • Follow-only model: The syndicate follows the terms and claims decisions set by lead reinsurers on each placement, keeping underwriting expertise with the lead.

Cortina Syndicate 1956: Structure, Capacity, and Market Role

According to the filing, Aon plc (NYSE:AON) and funds managed by Blackstone (NYSE:BX) announced the formation of Cortina syndicate 1956, a new Lloyd's syndicate intended to deliver dedicated, multi-year reinsurance capacity. QBE has been named as Managing Agent and will be responsible for the syndicate's underwriting and governance. The syndicate intends to begin underwriting from 1 January 2027, subject to final Lloyd's approval.

The filing describes Cortina as operating on a conventional "lead/follow" basis, meaning the syndicate follows the terms and claims decisions established by the lead reinsurer on each placement. For participating clients, the syndicate will write three percent of eligible property catastrophe excess-of-loss treaties and five percent of all other eligible treaties arranged by Aon. The filing states that clients will benefit from the economic efficiencies of Cortina's structure through a dividend based on Cortina's share of their reinsurance programs.

The filing quotes Greg Case, President and CEO of Aon, as saying: "Cortina is bringing additional, long-term capital through Blackstone together with QBE's expertise and the strength of Lloyd's to expand the market's capacity to take risk, help close protection gaps and enable greater resilience, investment and growth." Patrick Tiernan, Chief Executive of Lloyd's, is quoted describing the structure as utilizing Lloyd's "London Bridge 2 framework." The filing notes Cortina's Lloyd's syndicate status carries an A+ financial strength rating.

What Was Disclosed

Aon and Blackstone disclosed the launch of Cortina syndicate 1956 at Lloyd's, with QBE as Managing Agent, targeting a 1 January 2027 underwriting start following Lloyd's "in principle" approval received on 16 October 2026.