Category: Insurance history · Reviewed by Jake Leat, Associate Director · Last reviewed 2026-06-05
The Sun Fire Office, established in London in 1710, was the first proprietary joint-stock fire insurance company in the United Kingdom and one of the foundational institutions of the modern insurance industry. It traded continuously for over three centuries before its absorption into Royal Sun Alliance and ultimately RSA Insurance Group plc.
Category: Insurance history Also known as: Sun Fire Office, Sun Insurance Office, “The Sun” Established: April 1710 (originally as the Company of London Insurers) Related concepts: Hand-in-Hand Insurance Society 1696, Royal Exchange Assurance 1720, London Assurance 1720
The Sun Fire Office was founded by Charles Povey in April 1710 as a joint-stock proprietary insurer, distinct from the earlier mutual offices of the 1680s and 1690s. The Office was constituted under deed of settlement, with proprietors holding transferable shares and the business managed by a court of directors. Premium income belonged to the proprietors rather than to the insured, in contrast to the mutual Hand-in-Hand.
The Sun operated under common-law deed of settlement until the joint-stock regulation of the nineteenth century. The Joint Stock Companies Act 1844 and the Life Assurance Companies Act 1870 introduced the first general regulatory framework for insurance offices. The Sun was incorporated by private Act in 1891 and brought within the statutory regime by the Assurance Companies Act 1909.
The Sun developed several techniques that became standard practice: graded rating of risks by construction class (brick versus timber-framed), differential pricing by hazard category, the printed firemark numbered for each policy, and a private fire brigade that responded to insured premises. The Sun’s surviving policy registers from the eighteenth century are an important source for British economic and social history.
The Sun absorbed numerous offices over the eighteenth and nineteenth centuries and extended into accident, marine and life business. In 1959 it merged with the Alliance Assurance Company to form Sun Alliance Insurance Group; in 1996 Sun Alliance merged with Royal Insurance to form Royal & Sun Alliance, rebranded RSA in 2008. RSA Insurance Group plc was acquired by Intact Financial Corporation (Canada) and Tryg A/S (Denmark) in June 2021, with the UK business retained by Intact under the RSA brand.
A 1740 Sun policy on a London merchant’s warehouse in Bishopsgate carried a brick-built premium rate, identified the premises by a numbered firemark (kept in the Sun’s records), and contributed to the Sun’s private brigade liability for attendance at fire — a model carried forward in modern property risk-rating.
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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