Oak Reinsurance

What Oak Reinsurance does

OAK Reinsurance is a London-headquartered specialist reinsurance division of OAK Global, operating through Lloyd's Syndicate 2843 (underwritten by Lloyd's Insurance Company S.A. Syndicate 5424). Founded in 2024 as a trading name of OAK Servco Limited, the platform provides expert underwriting and tailored primary reinsurance solutions across multiple lines of business. It is part of a multi-division structure that also includes OAK Enterprise (property and specialty retrocession through Lloyd's Syndicate 1440) and OAK Horizon (a cross-class strategy launched 1 January 2026 targeting climate and technology risks such as energy systems, data centers, and emerging technologies). The business is an Appointed Representative of Polo Managing Agency Limited and holds financial strength ratings from AM Best, S&P, and Fitch.

The platform is differentiated by science and data-driven analytics combined with underwriting expertise, and by a proprietary systems-based framework used to construct portfolios addressing interconnected climate and technology exposures. Its go-to-market is enterprise field sales through the Lloyd's market, leveraging Lloyd's global licensing and market infrastructure to reach cedants and brokers internationally. Strategic partnerships — such as the 2026 sponsorship of New Energy Risk's Lloyd's coverholder application for US clean energy tax credit insurance — extend the platform's reach into adjacent specialty verticals. The company is backed by long-term investors including Bain Capital and Hampden Agencies, with Cathal Carr serving as Founder, CEO and CUO.

Revenue is generated through reinsurance premiums collected from cedants and reinsurance contracts on a subscription/recurring basis, with pricing negotiated per risk based on individual underwriting assessments. OAK Global positions itself as a multi-line specialty underwriter competing for complex, non-commodity risk in the Lloyd's market, with growing emphasis on climate-tech and retrocession capacity as differentiated offerings within the syndicate structure.

Name

Oak Reinsurance

Legal name

OAK Servco Limited

Website

https://oakreinsurance.com

Company type

Private

Founded year

2024

Operating status

Operating

Headcount range

11–50 employees

Short description

OAK Reinsurance is a London-based specialist reinsurance division of OAK Global, operating through Lloyd's Syndicate 2843 to provide tailored primary reinsurance solutions across multiple lines of business. It serves cedants and brokers globally as part of a multi-division Lloyd's platform spanning reinsurance, retrocession, and climate-tech underwriting.

Ownership category

akta.pro rank

Product category

Reinsurance Underwriting

NAICS

Reinsurance Carriers (524130), Reinsurance Carriers (52413)

SIC

Insurance Agents, Brokers & Service (6411)

akta.pro primary industry

Energy / Power / Renewables Reinsurance (FSAOADAF)

akta.pro secondary industries

Property Catastrophe Reinsurance (FSAOACAA), Reinsurance Broker Analytics, Modeling & Advisory Services (FSAOAHAH)

Keywords

• Reinsurance underwriting
• Specialty insurance
• Property retrocession
• Climate risk underwriting
• Technology risk insurance

Headquarters

HQ city

London

HQ country

United Kingdom

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Infrastructure, Technology or R&D, Marketing or Sales

Revenue model

1. Reinsurance Underwriting: OAK Reinsurance provides expert underwriting and tailored primary reinsurance solutions across multiple lines, operating through Lloyd's Syndicate 2843. Revenue is generated through insurance premiums collected from cedants and reinsurance contracts.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels2 records

Core offering

OAK Reinsurance provides expert underwriting and tailored primary reinsurance solutions across multiple lines of business, operating through Lloyd's Syndicate 2843. It is the primary reinsurance arm of OAK Global, a Lloyd's-based underwriting platform that also operates OAK Enterprise (property and specialty retrocession via Syndicate 1440) and OAK Horizon (cross-class underwriting for climate and technology ecosystem risks).

Product overview

OAK Global operates as a multi-brand platform offering specialist underwriting and reinsurance solutions through three distinct divisions: OAK Reinsurance provides expert underwriting and tailored primary reinsurance solutions across multiple lines through Lloyd's Syndicate 2843; OAK Enterprise offers property and specialty retrocession capacity through Lloyd's Syndicate 1440; and OAK Horizon delivers a cross-class strategy targeting climate and technology ecosystem risks. All divisions operate under OAK Servco Limited and leverage Lloyd's market access to provide innovative risk solutions.

Differentiator

Problem solved

Functional benefit

Products and services

• OAK Reinsurance Expert underwriting and tailored primary reinsurance solutions across multiple lines of business, operating through Lloyd's Syndicate 2843. For cedants, primary insurers, and counterparties seeking multi-line reinsurance capacity from a Lloyd's syndicate.
• OAK Enterprise Property and specialty retrocession capacity, operating through the newly formed Lloyd's Syndicate 1440. For reinsurers, capital partners, and counterparties seeking additional retrocession capacity for property catastrophe and specialty portfolios.
• OAK Horizon Cross-class underwriting strategy focused on risk solutions across the climate and technology ecosystem (energy systems, data centers, emerging technologies), underwritten through OAK Global's Lloyd's syndicates. For climate/technology sector insureds, developers, and specialist coverholders operating in emerging risk areas.

Named customers1 record

Segments4 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature1 record

Partnerships

Four partnerships are on record, tiered core.

• New Energy RiskcoreStrategic or Co-development Partner · 1 January 2026OAK Global (through Syndicate 2843) backed New Energy Risk's Lloyd's coverholder status application for tax credit insurance operations. The partnership enables NER to underwrite and bind insurance on behalf of Lloyd's syndicates and expands capacity for tax credit insurance products used in funding US clean energy projects. OAK Global's sponsorship forms part of its OAK Horizon business unit launched on 1 January 2026.
• Lloyd's of LondoncoreOthersOAK Global operates as an underwriting platform through Lloyd's Syndicates 2843 and 1440. The Lloyd's market provides the regulatory framework, financial strength ratings, and global market access that underpins OAK Global's operations. Lloyd's Blueprint initiatives support the platform's growth objectives.
• Polo Managing Agency LimitedcoreOthersPolo Managing Agency Limited is an Appointed Representative of OAK Servco Limited. It is the managing agent of Lloyd's Syndicates 2843 and 1440. FCA firm reference number 204976, company registration 03935227.
• Lloyd's Insurance Company S.A.coreOthersLloyd's Insurance Company S.A. is the entity behind Syndicate 5424 (Syndicate 2843) and Syndicate 5437 (Syndicate 1440), providing the corporate backing and financial strength for OAK Global's underwriting operations.

Scale indicators2 records

Recent moves7 records

Expansion highlights6 records

Broad incumbents

• Munich Re: World's largest reinsurer with broad specialty and emerging risk capabilities. Indirect peer given scale; relevant for understanding competitive landscape but not directly comparable in size or focus.
• Beazley plc: Established Lloyd's specialist insurer and reinsurer with deep London market presence. Comparable as a Lloyd's-anchored specialty operator, though much larger and more diversified than Oak Re.

Emerging players

• Accelerant: Data-enabled specialty insurance platform focused on serving Managing General Agents with curated capacity. Comparable as a tech-forward specialty underwriting platform though more MGA-focused than direct reinsurance.

Direct peers

• Convex Group: Newer specialty insurance and reinsurance group launched at Lloyd's and Bermuda with multi-class strategy and institutional backing. Closely comparable to Oak Re as a fellow startup-era Lloyd's platform building a diversified, data-driven underwriting franchise.
• Transatlantic Re (TransRe): Specialty reinsurer with strong property catastrophe and energy book, including renewable energy. Comparable multi-line reinsurance franchise with property and energy exposure relevant to OAK Reinsurance, OAK Enterprise, and OAK Horizon.
• Ariel Re: Bermuda/Lloyd's specialty re/insurer offering multi-line capacity with a focus on complex and emerging risks. Comparable business model and target client base to Oak Re's primary reinsurance and specialty offerings.
• Vantage Risk: Newer specialty re/insurance platform operating across multiple classes with emphasis on data-driven underwriting. Similar profile to Oak Re as a recently launched specialty platform with cross-class ambitions.
• Lancashire Holdings: Specialty re/insurer with significant Lloyd's presence offering property catastrophe and specialty lines capacity. Comparable as a Lloyd's-focused specialty reinsurer with property and specialty expertise overlapping OAK Enterprise.
• Aspen Insurance Holdings: Lloyd's and Bermuda specialty re/insurer with strong energy and property catastrophe franchises. Comparable as a multi-class specialty reinsurer with energy/renewables exposure relevant to OAK Horizon.

Others

• New Energy Risk: Clean energy insurance specialist that secured Lloyd's coverholder status backed by Oak Re. They are a distribution partner rather than a competitor, but operate in an adjacent clean energy insurance niche that overlaps with OAK Horizon's target segments.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key highlights7 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 records

Subsidiaries3 records

Funding overview

Funding rounds1 record

Investors2 records

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Oak Reinsurance