Marsh is a professional services firm that helps businesses, governments, and individuals deal with risk. It operates in 130 countries and earns money in two main ways. First, through its Risk and Insurance Services businesses, Marsh Risk and Guy Carpenter, it acts as a middleman between clients who need insurance and the insurance companies that provide it. Every time a client places an insurance or reinsurance policy through Marsh, the company earns a commission or fee. Second, through its Consulting segment, which includes Mercer and Marsh Management Consulting, it charges fees for advice on employee health benefits, retirement plans, investment management, and business strategy. In 2025, the company reported $27.0 billion in total revenue, with roughly 64% coming from Risk and Insurance Services and 36% from Consulting. The diagram below traces where the money goes.
How Marsh Makes Money
flowchart LR
A["Clients in 130 Countries"] -->|"Risk & Insurance Services 64%"| B["Marsh Risk & Guy Carpenter"]
A -->|"Consulting 36%"| C["Mercer & Management Consulting"]
B -->|"Commissions, Fees, Other Compensation"| D["Revenue $27.0B"]
C -->|"Client Fees, Asset-Based Fees"| D
D -->|"Operating Income 23.1%"| E["95,000 Colleagues & Operations"]
E -->|"Service Quality, Expertise, Analytics"| F["Client Retention & Growth"]
F --> A
C -->|"Assets Under Management $692B"| G["Investment Management Services"]
G -->|"Sub-Advisor Fees"| D
E -->|"Cash Generation $5.3B"| H["Operating Cash Flow"]
H -->|"Reinvestment"| E
Five years of financial data tell a clear story of steady growth. Revenue climbed from $19.8 billion in 2021 to $27.0 billion in 2025. Free cash flow, the money left over after the company pays its operating costs and capital needs, grew from $3.1 billion in 2021 to $5.0 billion in 2025. That is a meaningful improvement in cash generation over a short period.
Revenue 2021 to 2025 ($B)
Revenue has grown every year for five consecutive years, reaching $27.0 billion in 2025.
The cash generation story is equally consistent. Operating cash flow rose from $3.5 billion in 2021 to $5.3 billion in 2025. But there is one number that breaks the otherwise tidy picture: net debt. Net debt is the total amount a company owes to lenders, minus the cash it holds. Net debt stayed relatively stable between 2021 and 2023, sitting at around $9 to $10 billion. Then in 2024 it jumped sharply to $17.5 billion, driven by the $7.75 billion cash acquisition of McGriff Insurance Services. In 2025 it edged down slightly to $16.9 billion. The company is now carrying significantly more debt than it was two years ago.
What is a reinsurance broker?
Insurance companies themselves buy insurance, called reinsurance, to protect against very large losses. Guy Carpenter sits in the middle of that transaction, matching insurance companies with reinsurers. It earns a commission on each deal it arranges, just like a real estate agent earns a commission when a house is sold.
2024
milestone
The McGriff Acquisition
In November 2024, Marsh completed the acquisition of McGriff Insurance Services for $7.75 billion in cash. McGriff is a U.S. insurance broking and risk management business. The deal significantly boosted the size of the Marsh Risk division and pushed net debt from around $10 billion to $17.5 billion. Integration and retention costs related to McGriff reached $211 million in 2025 alone, with the company expecting approximately $250 million more in costs over the next two years.
The McGriff deal explains much of the reported revenue jump in 2025. When you strip out the effect of acquisitions and look only at the business Marsh already owned, underlying revenue grew 4% in Risk and Insurance Services and 5% in Consulting. Those are solid but not spectacular growth rates for a mature market. The company also launched a three-year cost-cutting program called Thrive in 2025, expecting to spend around $500 million on restructuring while targeting $400 million in annual savings once the program is complete.
$5.0B
Free cash flow in 2025, up from $3.1B in 2021
The risks Marsh faces are not abstract. They are specific and documented. The company handles sensitive data for clients across dozens of countries, which makes it a target for cyberattacks. A successful breach could expose financial records, health information, or personal data, leading to regulatory fines and reputational damage. Privacy laws are also tightening fast. Rules like the European Union's General Data Protection Regulation and emerging artificial intelligence laws could result in fines of up to 4% or more of global revenue if Marsh falls short of compliance standards.
What is an errors and omissions claim?
When a professional adviser makes a mistake, the client can sue for damages. For an insurance broker, this might mean failing to place the right coverage, so the client ends up uninsured when disaster strikes. These lawsuits are called errors and omissions claims, and they can be very large.
Marsh also faces the risk of being sued for mistakes made in its core work. If a client suffers a loss that was not properly covered because of advice Marsh gave, the company could be held responsible for that loss. These claims are difficult to cap with insurance, and a large case could result in substantial monetary penalties. On top of that, Marsh operates in countries covered by international trade sanctions, including rules related to Russia, Iran, North Korea, and Syria. Getting those compliance calls wrong carries criminal penalties and could cost the company its operating licenses in affected regions.
Artificial intelligence adds another layer of uncertainty. Marsh is investing in generative AI tools and relying on third-party AI software across its businesses. But AI models can contain biases or errors, and using client data to train AI systems carries the risk of leaking confidential information into public datasets. The company acknowledges these risks directly in its filings, but the financial consequences of getting AI wrong are genuinely hard to predict.
$16.9B
Net debt at end of 2025, up from $10.1B at end of 2023
Mercer's Wealth division manages approximately $692 billion in assets worldwide. A significant drop in financial markets would reduce those assets under management, which would directly reduce the fees Mercer earns from that business.
The company also competes intensely across every business it runs. In insurance broking, it faces pressure from other global brokers, from insurance companies that sell directly to clients, and from online platforms. In consulting, new competitors using generative AI are entering markets that Mercer and Marsh Management Consulting have traditionally dominated. Attracting and keeping talented advisers is itself described as a competitive challenge that is intensifying.
Why does debt matter more for a services company?
A company like Marsh does not own factories or oil fields that hold value if business slows. Its main assets are its people and its client relationships. If revenue falls and debt payments stay fixed, a services company has fewer hard assets to fall back on. That makes high debt levels worth watching closely.
$10.1B
Net debt, end of 2022
$16.9B
Net debt, end of 2025
The McGriff acquisition nearly doubled net debt in two years. Free cash flow of $5.0B in 2025 gives the company a path to pay it down, but it will take time.
The Bet
Marsh's ability to carry $16.9 billion in net debt comfortably depends on the assumption that demand for insurance broking and risk consulting keeps growing steadily, and that the McGriff integration delivers the revenue and cost benefits the company expects. If insurance premium rates fall significantly, if a major errors and omissions claim lands, or if McGriff's client relationships erode during integration, the cash flow that services that debt shrinks at precisely the moment the company needs it most. The entire logic of a debt-funded acquisition in a mature, competitive market rests on execution being as smooth as management projects.
Open question
Marsh has grown revenue consistently for five years, generates $5.0 billion in free cash flow annually, and operates in markets where demand for risk advice is unlikely to disappear. But it now carries nearly $17 billion in net debt after the McGriff deal, faces rising costs from restructuring, AI compliance, and cybersecurity, and operates in a mature market where underlying growth runs at roughly 4 to 5 percent per year. Can the company convert McGriff's scale into enough additional cash flow to meaningfully reduce that debt burden, while simultaneously funding AI investment, absorbing restructuring costs, and defending market share against new technology-driven competitors?
Compiled · 10-K · FY2025
Regulatory and Legal
The company faces significant uninsured liability from errors and omissions claims across its insurance placement and consulting businesses. These claims include allegations of failures to properly assess risks, place insurance coverage, or provide investment advice, and could result in substantial monetary damages, punitive damages, and reputational harm that are difficult to limit through insurance.
Cybersecurity and Data Protection
The company stores and processes sensitive client and employee data across multiple countries and relies on complex IT systems and third-party vendors, creating ongoing risk of data breaches, ransomware attacks, and system disruptions. A successful cyberattack could compromise financial records, health information, and personal data, leading to material financial loss, regulatory fines, and severe reputational damage.
Regulatory Compliance
The company must comply with evolving privacy and data protection laws across multiple jurisdictions including the EU's GDPR, California's CCPA, Australia's CPS 234, and emerging AI laws like the EU's AI Act. Non-compliance could result in fines up to 4% or more of global revenue, regulatory investigations, and operational restrictions on products and services.
Technology and Artificial Intelligence
The company is investing heavily in generative AI tools and relies on third-party AI-powered software, but AI models may contain biases, inaccuracies, or use data without proper rights, creating risks of litigation, regulatory enforcement, reputational harm, and inadvertent disclosure of confidential information into public training datasets.
Geopolitical and Trade Sanctions
The company is subject to trade sanctions laws covering multiple countries including Russia, Iran, North Korea, and Syria, and ongoing conflicts like the war in Ukraine create rapidly evolving sanctions requirements. Failure to comply with these complex and changing regulations could result in criminal penalties, loss of operating licenses, and increased compliance costs.
10-K Item 1A · Risk Factors
