Category: Reinsurance brokers and structures · Reviewed by Simon Temme, Account Executive · Last reviewed 2026-06-05
The lead reinsurer is the reinsurer that first agrees terms on a reinsurance placement and writes the largest individual line, setting the market for following reinsurers. The lead’s role mirrors that of the slip leader in primary London market placement.
Category: Reinsurance brokers and structures Also known as: leading reinsurer, lead market Related concepts: following reinsurer, reinsurance broker, slip leader
In treaty reinsurance the lead is appointed by the cedant (or its broker) before placement; the lead’s quotation and the negotiated terms become the benchmark for the rest of the placement. The lead typically writes 20–40 per cent of the cover, with following reinsurers filling the remainder.
The lead role is highly valued in the global reinsurance market: leading reinsurers (Munich Re, Swiss Re, Hannover Re, SCOR, Lloyd’s syndicates and Bermuda reinsurers) are the recognised price-setters and market-makers, and the standing of the lead affects the appetite of following reinsurers to subscribe.
The lead reinsurer’s role is governed by the slip and treaty wording — typically a Market Reform Contract or class-specific equivalent — and (where applicable) by the LMA General Underwriters Agreement, which provides delegated authority to the lead on certain claims and endorsements.
The cedant’s reinsurance broker approaches the prospective lead first, with the full submission and proposed terms. The lead provides a quotation; the broker negotiates the price, structure and conditions; the lead signs the slip with its share. The broker then presents the slip — now with the lead’s terms — to following reinsurers, who subscribe in smaller lines at the lead’s terms.
The lead has significant influence over the design of the reinsurance programme: structure, exclusions, attachment basis, reinstatement provisions and claims handling. A strong working relationship between cedant, broker and lead reinsurer is the foundation of an effective programme.
An illustrative example: a UK insurer’s £100m catastrophe XL programme is led at 25 per cent by Munich Re (the leading European catastrophe reinsurer). Following lines are taken by Swiss Re, Hannover Re, SCOR, three Lloyd’s syndicates and an ILS retrocession vehicle. The lead’s terms — premium rate, reinstatement provisions, hours clause definitions — apply to all subscribing reinsurers.
This entry is part of the Apex Insurance Wiki. Last reviewed by Matt Bartlett on 2026-06-05. Next review: 2026-12-05.
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