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Compare · AJG vs MMC

AJG vs MMC

Side-by-side comparison of Arthur J. Gallagher & Co. (AJG) and Marsh & McLennan Companies Inc. (MMC): market cap, price performance, sector, and recent activity on the wire.

Summary

  • Both AJG and MMC operate in Specialty Insurers (Finance), so they compete in similar markets.
  • MMC is the larger of the two at $75.87B, about 1.4x AJG ($55.53B).
  • Over the past year, AJG is down 32.0% and MMC is down 18.0% - MMC leads by 14.0 points.
  • AJG has hit the wire 8 times in the past 4 weeks while MMC has been quiet.
  • Both have 25 recent analyst ratings on file.
PerformanceAJG-17.50%MMC-17.98%
2025-10-29+0.00%2026-06-05
MetricAJGMMC
Company
Arthur J. Gallagher & Co.
Marsh & McLennan Companies Inc.
Price
$216.16+2.44%
$182.52-1.65%
Market cap
$55.53B
$75.87B
1M return
+9.80%
-0.51%
1Y return
-31.98%
-17.98%
Industry
Specialty Insurers
Specialty Insurers
Exchange
NYSE
NYSE
IPO
News (4w)
8
0
Recent ratings
25
25
AJG

Arthur J. Gallagher & Co.

Arthur J. Gallagher & Co., together with its subsidiaries, provides insurance brokerage, consulting, and third party claims settlement and administration services in the United States, Australia, Bermuda, Canada, the Caribbean, New Zealand, India, and the United Kingdom. Its Brokerage segment consists of retail and wholesale insurance brokerage operations. It offers brokerage and consulting services to businesses and organizations, including commercial, not-for-profit, and public entities, as well as individuals in the areas of insurance placement, risk of loss management, and management of employer sponsored benefit programs. This segment also assist retail brokers and other non-affiliated brokers in the placement of specialized and hard-to-place insurance; acts as a brokerage wholesaler, and managing general agent or managing general underwriter distributing specialized insurance coverage's for underwriting enterprises; and performs activities, including marketing, underwriting, issuing policies, collecting premiums, appointing and supervising other agents, paying claims, and negotiating reinsurance. The company's Risk Management segment provides contract claim settlement and administration services for enterprises and public entities; and claims management, loss control consulting, and insurance property appraisal services. The company offers its services through a network of correspondent insurance brokers and consultants. It serves commercial, industrial, public entity, religious, and not-for-profit entities. Arthur J. Gallagher & Co. was founded in 1927 and is headquartered in Rolling Meadows, Illinois.

MMC

Marsh & McLennan Companies Inc.

Marsh & McLennan Companies, Inc., a professional services company, provides advice and solutions to clients in the areas of risk, strategy, and people worldwide. It operates in two segments, Risk and Insurance Services, and Consulting. The Risk and Insurance Services segment offers risk management services, such as risk advice, risk transfer, and risk control and mitigation solutions, as well as insurance and reinsurance broking, catastrophe and financial modeling, and related advisory services; and insurance program management services. This segment serves businesses, public entities, insurance companies, associations, professional services organizations, and private clients. The Consulting segment provides health, wealth, and career consulting services and products; and specialized management, as well as economic and brand consulting services. Marsh & McLennan Companies, Inc. has collaboration with Chubb Limited to secure insurance coverage for the COVAX no-fault compensation program. The company was founded in 1871 and is headquartered in New York, New York.

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