Alwen Hough Johnson

What Alwen Hough Johnson does

Alwen Hough Johnson, now operating as AHJ Miller following its 2025 integration into the Miller group, is a London-headquartered specialist insurance and reinsurance broker founded in 1973. The firm delivers treaty and facultative reinsurance, captives and risk finance consulting, mortgage and credit risk solutions, strategic and capital advisory, life/personal accident and health reinsurance, non-marine and retrocession, ILS/ILW, and marine and energy reinsurance to insurance companies, reinsurers, cedants, retrocessionaires, captives, mortgage lenders, and life/health insurers across the UK, Bermuda, the Caribbean, Europe, MENA, North America, and Asia-Pacific.

The underlying technology stack is built around in-house actuarial analytics (historic loss and exposure data aligned to client strategy and risk appetite) and catastrophe analytics using CAT modelling software to optimise client portfolios and improve placement terms. The firm operates from physical offices in London (HQ at 70 Mark Lane), Bermuda, Geneva, and Singapore, and is part of a worldwide broker network that extends geographic reach. Senior coverage includes CEO Gary Masters, Chairman Roger Mount, Finance Director Angela Treen, and a bench of directors and heads of department covering treaty, facultative, marine liability, life/health, strategy and innovation, and regional lines.

Commercially, AHJ Miller earns revenue primarily through commission-based brokerage on treaty and facultative reinsurance placements (transaction fees on approximately $4 billion of gross written premiums), supplemented by professional services fees from captives consulting, risk finance advisory, and strategic/capital advisory mandates. Pricing is quote-based and negotiated per placement, reflecting the bespoke nature of large and high-hazard risk transfers. The go-to-market is enterprise field sales, leveraging direct expert advisory teams and long-standing client and market relationships. FY2025 group revenue reached £314 million (up 15% year-on-year) on stable gross written premiums of approximately $4 billion, marking the fifth consecutive year of growth, with 180 additional employees added in 2025 alongside acquisitions of AHJ Holdings and Bruzon and the potential addition of Shields Reinsurance.

Name

Alwen Hough Johnson

Legal name

Miller Insurance Services LLP

Website

https://ahjltd.co.uk

Company type

Private

Founded year

1973

Operating status

Operating

Headcount range

11–50 employees

Short description

Alwen Hough Johnson (AHJ Miller) is a London-based specialist insurance and reinsurance broker founded in 1973, placing treaty, facultative, and specialty reinsurance for insurers, cedants, captives, and lenders globally through in-house actuarial and CAT analytics teams.

Ownership category

akta.pro rank

Product category

Reinsurance Brokerage

NAICS

Agencies, Brokerages, and Other Insurance Related Activities (5242), Insurance Agencies and Brokerages (524210)

SIC

Insurance Agents, Brokers & Service (6411), Fire, Marine & Casualty Insurance (6331)

akta.pro primary industry

Treaty Reinsurance Brokerage (FSAOAHAA)

akta.pro secondary industries

Specialty Lines Treaty Reinsurance (e.g., marine, aviation, cyber, energy, surety) (FSAOAEAF), Health & Accident Treaty Reinsurance (FSAOAEAB), Life Treaty Reinsurance (FSAOAEAA), Casualty Treaty Reinsurance (FSAOAEAD)

Keywords

• Reinsurance brokerage
• Treaty reinsurance
• Facultative reinsurance
• Risk finance consulting
• Insurance broking services

Headquarters

HQ city

London

HQ country

United Kingdom

HQ region

Europe

Offices4 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Reinsurance Brokerage: Miller acts as a specialist insurance and reinsurance broker, earning commissions on treaty and facultative reinsurance placements. The company manages gross written premiums of approximately $4 billion.
2. Captives & Risk Finance Consulting: Advisory services for captives and risk finance solutions.
3. Strategic & Capital Advisory: Strategic advisory services for reinsurance capital optimization.
4. Insurance Products Distribution: Distribution of various insurance products including Accident & Health, Property & Casualty, Cyber, Marine, Professional Indemnity, and specialized coverage solutions.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

Alwen Hough Johnson is a specialist broking house that places treaty and facultative reinsurance and delivers related risk-finance consulting for insurers, reinsurers, captives and financial institutions. Services cover treaty reinsurance (proportional and non-proportional), facultative reinsurance for large or high-hazard risks, captives and risk finance consulting, mortgage and credit risk solutions, strategic and capital advisory, life/personal accident/health reinsurance, non-marine reinsurance and retrocession, ILS/ILW, and marine and energy reinsurance.

Product overview

Alwen Hough Johnson (trading as Miller and AHJ Miller) is a specialist insurance and reinsurance broker offering a portfolio of customized reinsurance solutions. The core offering includes Treaty Reinsurance across multiple geographic regions (Asia, Bermuda, Caribbean, Europe, MENA, UK, and North America), Facultative Reinsurance for large and high-hazard individual risks, Captives & Risk Finance Consulting, Mortgage & Credit Risk Solutions, Strategic & Capital Advisory, and Life/Personal Accident/Health Reinsurance. Additional classes include Non-Marine Reinsurance, ILS/ILW products, and Marine & Energy reinsurance. The company employs in-house actuarial and catastrophe analytic teams using CAT modelling software to optimize client portfolios and reinsurance solutions.

Differentiator

Problem solved

Functional benefit

Products and services

• Treaty Reinsurance Treaty reinsurance placements covering multiple geographic regions including Asia, Bermuda, Caribbean, Europe, Middle East, UK, and North America, providing proportional and non-proportional reinsurance contracts to ceding insurance companies.
• Facultative Reinsurance Facultative reinsurance solutions for individual, large or high-hazard risks that require specific underwriting and placement beyond standard treaty arrangements.
• Captives & Risk Finance Consulting Consulting services for captive insurance company formation, management and risk finance structuring to optimize capital and coverage for clients.
• Mortgage & Credit Risk Solutions Reinsurance solutions specifically focused on mortgage credit risk, including portfolio transfer and risk mitigation for lenders and financial institutions.
• Strategic & Capital Advisory Advisory services to optimize reinsurance program design, capital efficiency and overall risk strategy for clients.
• Life, Personal Accident & Health Reinsurance Life, personal accident and health reinsurance products providing coverage for mortality, morbidity and health-related risks.
• Non-Marine Reinsurance and Retrocession Non-marine reinsurance and retrocession products covering property, casualty and specialty risks outside the marine sector.
• ILS/ILW Insurance-Linked Securities and Industry Loss Warranties products providing catastrophe risk transfer through capital markets instruments.
• Marine and Energy Reinsurance Specialized reinsurance solutions for marine hull, liability, cargo and energy sector risks including upstream and downstream operations.

Quantifiable outcome

• Fifth consecutive year of revenue growth with 15% increase to £314 million in 2025
• +1 more outcomes

Named customers2 records

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature2 records

Partnerships

Four partnerships are on record, tiered core and minor.

• AHJ Holdings Ltd.coreStrategic or Co-development Partner · 1 January 2025Acquisition completed in 2025 as part of Miller's global expansion strategy, strengthening the company's presence and capabilities in the specialist reinsurance market.
• BruzoncoreStrategic or Co-development Partner · 1 January 2025Acquisition completed in 2025 to expand Miller's global footprint and service offerings in the insurance and reinsurance sector.
• Shields ReinsuranceminorStrategic or Co-development Partner · 1 January 2025Potential acquisition under consideration to further expand Miller's reinsurance capabilities and market presence.
• Worldwide Broker NetworkcoreChannel Partner/ Reseller/ DistributorMiller is part of a worldwide broker network enabling global reach and connectivity for insurance and reinsurance placements across multiple markets.

Scale indicators4 records

Recent moves6 records

Expansion highlights5 records

Broad incumbents

• Arthur J. Gallagher (AJG): Arthur J. Gallagher is a global insurance brokerage and risk management firm with a growing reinsurance and wholesale placement capability. Provides overlapping placement services and competes for similar cedant relationships, particularly through its Reinsurance & Wholesale operations.
• Guy Carpenter (Marsh): Guy Carpenter is the dedicated reinsurance and risk advisory arm of Marsh & McLennan, providing treaty and facultative placements globally. Operates in the same specialist (re)insurance broker space as AHJ Miller and is the most frequently cited competitor for large cedant mandates.
• Willis Towers Watson (WTW): WTW operates a global reinsurance brokerage business providing treaty and facultative placements alongside its broader advisory and broking franchises. A meaningful competitor for large cedant mandates and a comparable global specialist reinsurance broker, with similar product breadth though larger scale.
• Aon (Aon Reinsurance): Aon operates the largest global reinsurance brokerage practice (Aon Reinsurance), offering treaty and facultative placements to cedants worldwide. Directly comparable to AHJ Miller's core reinsurance broking franchise, with overlapping product set but at meaningfully greater scale and conflict-of-interest constraints.

Direct peers

• Lockton: Lockton is the world's largest independent insurance broker, offering both direct insurance and reinsurance placement across multiple lines globally. Comparable to AHJ Miller on independence, specialty capability, and global footprint, though with significantly broader direct-insurance scale.
• BMS Group: BMS is an independent specialist insurance and reinsurance broker with strong London and international operations focused on treaty, facultative, and capital advisory. Closely mirrors AHJ Miller's specialist positioning and product mix, especially in treaty and capital advisory.
• Acquisition Group / Ed Broking: Acquisition Group (including Ed Broking) is an independent specialist insurance and reinsurance broker with a strong London market presence. Directly comparable mid-sized specialist broker competing for similar treaty and facultative mandates across P&C, marine, energy, and specialty lines.
• RKH Specialty (Hyperion / RKH): RKH Specialty is an independent specialty insurance and reinsurance broker with London origination and growing international operations through the Hyperion network. Directly comparable mid-sized specialist with overlapping specialty and treaty broking capabilities.
• Howden: Howden is a London-headquartered independent specialist insurance and reinsurance broker that has grown rapidly through acquisitions and now operates globally. Most directly comparable to AHJ Miller given shared independent specialist positioning, London heritage, and multi-line (re)insurance offering with similar capital-light brokerage economics.

Regional players

• Holborn (Holborn Assets): Holborn is a specialist (re)insurance broker with growing European and international presence, focused on treaty and facultative placements in specialty lines. Comparable in mid-size specialist positioning and product focus, though with somewhat narrower geographic footprint than AHJ Miller.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

• Xtwitter.com/MillerLLP
• Facebookfacebook.com/millerllp
• LinkedInlinkedin.com/company/miller-insurance-services-llp
• Instagraminstagram.com/millerllp

Revenue estimate

Valuation estimate

Number of profiles

Profiles17 records

Subsidiaries2 records

Funding overview

Funding rounds

Investors

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 Alwen Hough Johnson