Who is the largest insurance broker?

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📊 The largest insurance broker in the world and the U.S. is Marsh McLennan, generating over $25 billion in global revenue.

📈 Top Global Insurance Brokers

The largest global brokerage firms ranked by annual revenue include:

  • 🌐 Marsh McLennan: ~$25.3B (U.S.) - Global leader in risk, strategy, and human capital.
  • 🌐 Aon: ~$15.4B (U.K.) - Specializes in risk management and reinsurance.
  • 🌐 Arthur J. Gallagher & Co.: ~$11.1B (U.S.) - Major player in commercial insurance and consulting.
  • 🌐 Willis Towers Watson (WTW): ~$9.7B (U.K./U.S.) - Focuses on advisory, broking, and solutions.
  • 🌐 Alliant Insurance Services: ~$5.0B (U.S.) - Leading large privately-owned U.S. broker.
  • 🌐 Hub International: ~$4.8B (U.S.) - Extensive property and casualty network.
  • 🌐 Brown & Brown: ~$4.7B (U.S.) - Diversified risk management and insurance products.
  • 🌐 Acrisure: ~$4.0B (U.S.) - Fintech-driven global insurance broker.
  • 🌐 Lockton: ~$3.9B (U.S.) - Largest privately held independent broker.
  • 🌐 Howden Group: ~$3.8B (U.K.) - International insurance intermediary group.

💡 Industry Drivers

  • M&A Activity: Continuous mergers and acquisitions fuel rapid scaling among top firms.
  • Core Services: Focus heavily on commercial property/casualty (P&C), reinsurance, and employee benefits.
  • Emerging Risks: High demand driven by complex cyber security threats and global risk adjustments.

Who are the big 3 insurance brokers?

The big three insurance brokers globally, ranked by total revenue, are Marsh McLennan, Aon, and Arthur J. Gallagher & Co.

  • Marsh McLennan: The world's largest insurance broker, based in New York, USA. It generates over $25 billion in revenue. It specializes in risk, strategy, and human capital.
  • Aon: The second-largest global insurance broker, headquartered in London, UK. It brings in more than $15 billion in revenue. It focuses on risk management and reinsurance.
  • Arthur J. Gallagher & Co.: The third-largest global insurance broker, based in Rolling Meadows, Illinois, USA. It reports over $11 billion in revenue. It provides global brokerage, consulting, and risk placement services.

What are the big 4 insurance brokers?

The "Big 4" global insurance brokers are Marsh McLennan, Aon, Arthur J. Gallagher & Co., and Willis Towers Watson (WTW).

The Big 4 Overview

  • Marsh McLennan (Marsh):
    • The largest insurance broker and risk advisor in the world.
    • Headquartered in New York City, USA.
    • Focuses on risk management, insurance broking, and consulting (via subsidiaries like Mercer and Guy Carpenter).
  • Aon plc:
    • The second-largest insurance broker globally.
    • Headquartered in London, United Kingdom.
    • Specializes in risk, retirement, and health solutions.
  • Arthur J. Gallagher & Co. (Gallagher):
    • The third-largest global insurance brokerage and risk management firm.
    • Headquartered in Rolling Hills, Illinois, USA.
    • Provides global commercial insurance, risk management, and human resources consulting.
  • Willis Towers Watson (WTW):
    • The fourth-largest insurance broker worldwide.
    • Headquartered in London, United Kingdom.
    • Focuses on advisory, broking, and solutions across people, risk, and financial capital.

Who are the top 3 largest insurance brokers in the world?

The top three largest insurance brokers in the world by revenue are Marsh McLennan, Aon plc, and Arthur J. Gallagher & Co..

Top 3 Insurance Brokers

  • Marsh McLennan: Ranked as the largest insurance broker globally with annual revenues nearing $27 billion. It is based in New York, USA.
  • Aon plc: Ranked as the second-largest global broker with revenues around $17 billion. It is headquartered in London, United Kingdom.
  • Arthur J. Gallagher & Co.: Ranked as the third-largest global broker with revenues surpassing $13 billion. It is based in Rolling Meadows, Illinois, USA.

Who are the top 10 insurance brokers?

The largest insurance broker in the world is Marsh & McLennan, with annual revenues exceeding $25 billion.

📊 Top 10 Global Insurance Brokers

The top 10 insurance brokers ranked by total brokerage revenue range from industry giants like Marsh McLennan at $25.3B down to Howden Insurance Brokers at $3.8B. For the complete ranked list with detailed revenue figures and headquarters, please consult the referenced source.

One of the world's most successful insurance salesman, Peter Rosengard

9 related questions found

Which is the largest insurance broker in the USA?

The largest insurance broker in the United States by revenue is Marsh McLennan.

Top U.S. Insurance Brokers

  • Marsh McLennan: Generates over $12.6 billion in U.S. revenue.
  • Aon: Generates roughly $7.5 billion to $8 billion in revenue.
  • Arthur J. Gallagher & Co.: Generates around $7 billion to $8.8 billion in revenue.
  • Alliant Insurance Services: Ranks as a top U.S. broker and the largest privately owned firm.

Who are the top 50 insurance brokers in the US?

The largest insurance brokers in the United States are led by Marsh McLennan, Arthur J. Gallagher & Co., and Aon, which dominate the sector based on multi-billion dollar annual revenues.

Top U.S. Insurance Brokers (Leading the Top 50)

The top tier of U.S. and global brokers ranked by brokerage revenue includes:

  • Marsh McLennan (New York, NY) – Leading the industry with over $12.6 billion in U.S. revenue.
  • Arthur J. Gallagher & Co. (Rolling Meadows, IL) – A massive global and domestic presence generating over $7 billion to $8 billion in revenue.
  • Aon PLC (London/Chicago) – One of the big three global brokerages with multi-billions in U.S. business.
  • Willis Towers Watson (WTW) (London/Arlington, VA) – Major provider of risk management and employee benefit solutions.
  • Alliant Insurance Services, Inc. (Irvine, CA) – Top-performing large independent/privately-owned broker.
  • Hub International Ltd. (Chicago, IL) – Large retail and personal lines broker.
  • Brown & Brown Inc. (Daytona Beach, FL) – Core top-five national powerhouse.
  • Acrisure LLC (Grand Rapids, MI) – Rapidly scaled insurance and financial services firm.
  • Lockton Companies LLC (Kansas City, MO) – Largest privately held independent broker.
  • USI Insurance Services (Valhalla, NY) – National specialized risk and benefits broker.

Other Notable Firms in the Top 50

Other prominent agencies rounding out positions across national top-50 and top-100 lists (such as rankings compiled by Business Insurance and Insurance Journal) include:

  • AssuredPartners (Lake Mary, FL)
  • EPIC Insurance Brokers & Consultants (San Mateo, CA)
  • Higginbotham & Associates (Fort Worth, TX)
  • Houchens Insurance Group (Bowling Green, KY)
  • Alera Group (Deerfield, IL)
  • Inszone Insurance Services
  • ALKEME Insurance

What are the 5 largest insurance companies in the US?

The five largest insurance groups in the United States by property and casualty net premiums written are State Farm, Progressive, Berkshire Hathaway, Allstate, and Travelers.

Top 5 U.S. Insurers (Property & Casualty)

  • State Farm Group: The largest auto and home insurer in the U.S., writing over $113 billion in net premiums.
  • Progressive Insurance Group: A massive personal and commercial auto insurer, generating about $83 billion in net premiums.
  • Berkshire Hathaway Insurance Group: The parent company of GEICO and major reinsurance entities, writing roughly $81 billion in premiums.
  • Allstate Insurance Group: A leading provider of personal auto and homeowners insurance, with around $57 billion in net premiums.
  • Travelers Group: A dominant commercial and personal property insurer, reporting roughly $42 billion in net premiums.

You can review broader industry statistics and market shares through the Insurance Information Institute. If you look strictly at health insurance, UnitedHealth Group is the largest provider in the country.

Who are the main insurance brokers?

The largest insurance brokers globally, ranked by annual revenue, are Marsh McLennan, Aon, and Arthur J. Gallagher & Co..

Top Global Insurance Brokers

  • Marsh McLennan: The largest broker in the world, based in New York, focusing on risk, strategy, and human capital.
  • Aon: A major global professional services firm based in London, providing risk, retirement, and health solutions.
  • Arthur J. Gallagher & Co.: An international insurance brokerage and risk management company based in Illinois.
  • Willis Towers Watson (WTW): A leading global advisory, broking, and solutions company based in London.
  • Hub International: A large North American insurance brokerage offering property, casualty, and employee benefits.
  • Acrisure: A fast-growing fintech and insurance brokerage firm based in Michigan.
  • Brown & Brown: A prominent independent insurance intermediary based in Florida.

What They Do

  • Risk Management: Help businesses identify, measure, and manage complex financial and operational risks.
  • Policy Placement: Act as an independent middleman to shop policies across multiple insurance carriers on behalf of clients.
  • Employee Benefits: Design and administer health, retirement, and welfare programs for corporate workforces.

Which type of insurance broker makes the most money?

Commercial property and casualty (P&C) and high-net-worth specialty insurance brokers make the most money.

High-Earning Broker Specialties

  • Commercial P&C Brokers: Sell large business policies, corporate coverage, and specialized liability. They handle massive multi-million dollar premiums, which yield huge commission checks.
  • Group Health and Benefits Consultants: Use a Per Member Per Month (PMPM) model. This creates ongoing monthly residual income from large corporate employee pools.
  • Surety Bond Producers: Work on large municipal or civil construction projects. They can earn massive individual commissions because agency payouts reach 35% to 40%.
  • High-Net-Worth Personal Lines Brokers: Focus on wealthy individuals with expensive homes, cars, and yachts, resulting in much larger policy values than standard home or auto insurance.

Why These Specialties Pay More

  • Larger Premiums: Higher asset values mean larger total policy costs and bigger percentage cuts for the broker.
  • Residual Commissions: Corporate accounts renew every year, providing steady, passive income streams.
  • Complex Needs: Businesses and wealthy clients require tailored risk advice, allowing brokers to charge high consulting and brokerage fees.

Learn more about compensation structures in the Jonus Group Career Rankings.