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Item 1A. Risk Factors.

Risk Factor Summary

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Global economic and geopolitical events, such as inflation, monetary policy responses and changing interest rates; a recession or economic downturn, political violence, and instability, including geo-economic fragmentation, could adversely affect our results of operations and financial condition.

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Economic conditions that result in financial difficulties for underwriting enterprises or lead to reduced risk-taking capital capacity could adversely affect our results of operations and financial condition.

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We have historically acquired large numbers of insurance brokers, benefit consulting firms and, to a lesser extent, third party claims administration and risk management firms. We may not be able to continue such an acquisition strategy in the future and there are risks associated with such acquisitions, which could adversely affect our growth and results of operations.

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We face additional risks relating to acquisitions that are larger than our usual tuck-in acquisitions, including that these acquisitions will not perform as expected and that we cannot successfully integrate complex operations.

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Damage to our reputation could have a material adverse effect on our business.

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Our sustainability and ESG-related aspirations, goals and initiatives, and our public statements and disclosures regarding them, expose us to numerous risks.

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If we are unable to apply technology and data analytics effectively in driving value for our clients through technology-based solutions or gain internal efficiencies and effective internal controls through the application of technology and related tools, our operating results, client relationships, growth and compliance programs could be adversely affected.

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We are subject to risks associated with AI.

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Our success depends, in part, on our ability to attract and retain qualified talent, including our senior management team.

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The substantial increase in remote work among our employees subjects us to certain challenges and risks.

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Business disruptions could have a material adverse effect on our operations, damage our reputation and impact client relationships.

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Sustained increases in compensation expense and the cost of employee benefits could reduce our profitability.

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Our substantial operations outside the U.S. expose us to risks different than those we face in the U.S.

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Changes in tax laws could adversely affect us.

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We face significant competitive pressures in each of our businesses.

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Volatility or declines in premiums or other adverse trends in the insurance industry may seriously undermine our profitability.

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Contingent and supplemental revenues we receive from underwriting enterprises are less predictable than standard commission revenues, and any decrease in the amount of these forms of revenue could adversely affect our results of operations.

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We face a variety of risks in our benefit consulting operations distinct from those we face in our insurance brokerage operations.

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We face a variety of risks in our third-party claims administration operations that are distinct from those we face in our brokerage and benefit consulting operations.

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Climate risks, including the risk of an economic crisis, risks associated with the physical effects of climate change and disruptions caused by the transition to a low-carbon economy, could adversely affect our business, results of

operations and financial condition.

Regulatory, Legal and Accounting Risks

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Improper disclosure of confidential, personal or proprietary information and cybersecurity attacks or other security breach of our information systems, or those of third-party vendors we rely on, could result in regulatory scrutiny, legal liability or reputational harm, and could adversely affect our business, financial condition and reputation.

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We are subject to a number of contingencies and legal proceedings which, if determined unfavorably to us, would adversely affect our financial results.

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Changes in data privacy and protection laws and regulations, or any failure to comply with such laws and regulations, could adversely affect our business and financial results.

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We could be adversely affected by violations or alleged violations of laws that impose requirements for the conduct of our overseas operations, including the FCPA, the U.K. Bribery Act or other anti-corruption laws, sanctions laws, and FATCA.

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We are subject to regulation worldwide. If we fail to comply with regulatory requirements or if regulations change in a way that adversely affects our operations, we may not be able to conduct our business, or we may be less profitable.

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We are subject to a number of contingencies and legal proceedings which, if determined unfavorably to us, would adversely affect our financial results.

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Changes in our accounting estimates and assumptions could negatively affect our financial position and operating results.

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Risks Relating to our Investments, Debt and Common Stock

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Our clean energy investments are subject to various risks and uncertainties.

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The IRC Section 45 operations in which we have invested and the by-products from such operations may result in environmental and product liability claims and environmental compliance costs.

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We have debt outstanding that could adversely affect our financial flexibility and subjects us to restrictions and limitations that could significantly impact our ability to operate our business.

Credit rating downgrades would increase our financing costs and could subject us to operational risk.

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We are a holding company and, therefore, may not be able to receive dividends or other distributions in needed amounts from our subsidiaries.

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Future sales or other dilution of our equity could adversely affect the market price of our common stock.

Risks Relating to our Business Generally

Global economic conditions and geopolitical events may cause unstable economic conditions in the countries, regions or industries in which we operate and adversely affect our results of operations and financial condition.

Global economic events, including accommodative monetary and fiscal policies, have contributed to significant inflation in many markets in which we operate. To combat inflation and restore price stability, the U.S. Federal Reserve and other central banks raised interest rates in 2023. While moderate inflation generally benefits our industry by increasing insurable asset values, increased inflation and higher interest rates have had far-reaching negative effects on the global economy during the past several years. Geopolitical conflicts such as the wars in Ukraine and the Middle East, geo-economic fragmentation, climate change, the transition to a low-carbon economy, political crises like potential U.S. governmental shutdowns or gridlock over increasing the U.S. debt ceiling, and political violence and instability worldwide could also weigh negatively on the economy.

A recession or decline in economic activity, for these and any other reasons, could adversely impact us in future periods. This could happen, for example, if our clients reduce the amount of insurance coverage, reinsurance coverage, consulting services or

claims administration services they purchase due to reductions in headcount, payroll, or replacement and asset values, among other factors. Whether these reductions are caused by an overall economic downturn or declines in certain countries, regions and industries in which we operate, our commission and fee revenues, consulting revenues, or revenues from managing third-party insurance claims could be adversely impacted. Some of our clients may also experience liquidity problems or other financial difficulties due to tightening credit markets or lower levels of economic activity. If our clients file for bankruptcy, liquidate their operations, consolidate or are generally unable to meet their obligations, our revenues, ability to collect receivables and liquidity could be adversely impacted, which could have an adverse effect on our results of operations and financial condition.

Uncertain economic conditions have created volatility in the U.S. and other markets where we operate. A rise in the cost of labor, cost of capital, or interest and tax rates, among other things, could negatively impact our operating and general and administrative expenses. We have no or limited control over such developments. If our costs grow significantly, our margins and results of operations may be materially and adversely impacted and we may not be able to achieve our strategic and financial objectives. Further, a tightening of credit or capital markets could negatively impact our business, financial condition and liquidity, including our ability to continue to access preferred sources of liquidity when needed and under similar terms, which may increase our capital costs. We could also experience losses on holdings of cash and investments due to failures of financial institutions and other counterparties. Thus, a deterioration in macroeconomic conditions could adversely affect our business, results of operations or financial condition.

Lower interest rates in the future could reduce investment earnings on our cash, revenue from our premium financing operations and short-term investments of fiduciary and operating funds. In addition, lower levels of inflation in the future may reduce our revenue growth by slowing the increase in insurable asset values.

We have a significant amount of receivables from certain of the underwriting enterprises with which we place insurance and reinsurance. If those companies experience liquidity problems or other financial difficulties, we could encounter delays or defaults in payments owed to us, which could have a significant adverse impact on our consolidated financial condition and results of operations. The failure of an underwriting enterprise with which we place business could result in E&O claims against us by our clients. Further, the failure of E&O underwriting enterprises could make the E&O insurance we rely upon cost prohibitive or unavailable. Underwriting enterprises are also clients of Gallagher Re and, as such, any of the negative developments for underwriting enterprises referred to above could also reduce our commission revenues from such clients. Any of these developments could adversely affect our results of operations and financial condition. In addition, if underwriting enterprises merge, fail, or withdraw from offering certain lines of coverage, for example, because of large payouts related to climate or weather events or other emerging risk areas, overall risk-taking capital capacity could be negatively affected, which could reduce our ability to place certain lines of coverage, reduce demand from the insurance company clients of Gallagher Re and, as a result, reduce our revenues and profitability.

We have historically acquired large numbers of insurance brokers, benefit consulting firms and, to a lesser extent, third party claims administration and risk management firms. We may not be able to continue such acquisition strategy in the future and there are risks associated with such acquisitions, which could adversely affect our growth and results of operations.

Our ordinary-course acquisition program has been an important part of our historical growth, particularly in our brokerage segment, and we believe that similar acquisition activity will be important to maintaining comparable growth in the future. Failure to successfully identify and complete acquisitions would likely result in slower growth. Continuing consolidation in our industry and a high level of interest in acquiring insurance brokers on the part of private equity firms, private equity-backed consolidators and newly public insurance brokers has, in some cases, made, and could in the future make, appropriate acquisition targets more difficult to identify and more expensive. Even if we are able to identify appropriate acquisition targets, we may not have sufficient capital to fund acquisitions, be able to execute transactions on favorable terms or integrate targets in a manner that allows us to realize the benefits we have historically experienced from acquisitions. When regulatory approval of acquisitions is required, our ability to complete acquisitions may be limited by an ongoing regulatory review or other issues with the relevant regulator. Our ability to finance and integrate acquisitions may also decrease if we complete a greater number of larger acquisitions than we have historically. See the risk factor below regarding larger acquisitions. See also Note 3 to our 2023 consolidated financial statements for information regarding the size of transactions in the reporting period.

Post-acquisition risks include poor cultural fit and risks relating to retention of personnel, retention of clients, entry into unfamiliar or complex markets or lines of business, contingencies or liabilities, such as violations of sanctions laws or anti-corruption laws including the FCPA and U.K. Bribery Act, risks relating to ensuring compliance with licensing and regulatory requirements, tax and accounting issues, the risk that an acquisition distracts management and personnel from our existing business, and integration difficulties relating to accounting, information technology (which we refer to as IT), pay equity, or

human resources, some or all of which could have an adverse effect on our results of operations and growth. The failure of acquisition targets to achieve anticipated revenue and earnings levels could also result in goodwill impairment charges.

We face additional risks relating to acquisitions that are larger than our usual tuck-in acquisitions described above.

We can provide no assurance that we will be able to successfully integrate the operations of acquisitions that are larger than our usual tuck-in acquisitions, such as Willis Re, Buck, Eastern Insurance, Cadence Insurance and My Plan Manager, that they will perform as expected, or that we will not incur unforeseen obligations or liabilities. Integration efforts relating to larger acquisitions are more complex, including with respect to technology systems, which may divert management’s attention and resources and could adversely affect our operating results. In addition, we have made certain assumptions relating to these acquisitions that may be inaccurate, including as a result of the failure to realize expected benefits, higher than expected integration costs and unknown liabilities as well as general economic and business conditions. These assumptions relate to various matters, including projections of future revenues, non-GAAP measures, expenses and expense allocation; our ability to maintain, develop and deepen relationships with employees, including key brokers, and clients; the amount of goodwill and intangibles; and other unforeseen compliance, financial and strategic risks.

Damage to our reputation could have a material adverse effect on our business.

Our reputation is one of our key assets. We advise our clients on and provide services related to a wide range of subjects and our ability to attract and retain clients is highly dependent upon the external perceptions of our expertise, level of service, ability to protect client information, trustworthiness, business practices, financial condition and other subjective qualities such as ethics, culture and values. Our success is also dependent on maintaining a good reputation with existing and potential employees, investors, regulators and the communities in which we operate. Negative perceptions or publicity regarding these matters, including our association with clients or business partners with damaged reputations, or from actual or alleged conduct by us or our employees, including corruption or bribery allegations (for example, those in connection with the previously-disclosed investigation of our business in Ecuador) or cybersecurity incidents (for example, as disclosed in previous filings, we experienced a ransomware attack in 2020) could damage our reputation. Negative publicity resulting from one of our marketing partnerships (for example, with a sports team or league) could damage our brand and/or our reputation. Our reputation could also be harmed by negative perceptions or publicity regarding sustainability or ESG matters, including concerns with environmental, climate change, workforce diversity, political spending, pay equity, harassment, racial justice, cybersecurity and data privacy matters, as well as backlash against sustainability or ESG initiatives generally. Negative publicity may be posted on social media or other Internet forums, whether or not true, and the speed and pervasiveness with which information can be disseminated through these channels, in particular social media, may magnify the risks noted above. Any resulting erosion of trust and confidence could make it difficult for us to attract and retain clients, employees or investors; result in lower ESG ratings, exclusion of our stock from ESG-oriented indices, and reduced demand for our stock from ESG-focused investment funds; increase our cost of borrowing; or harm our relationships with regulators and the communities in which we operate. Any of these matters could have a material adverse effect on our business, financial condition and results of operations. As we venture into new jurisdictions and markets globally, negative reputational events (whether arising from regulatory matters or otherwise) may have a disproportionate impact in locations or markets where our employee and client presence is limited. Any negative publicity could potentially hinder our growth prospects in such locations or markets. See below for additional risk factors regarding climate change and ESG initiatives and disclosures.

Our ESG-related aspirations, goals and initiatives, and our statements and disclosures regarding ESG-related matters, expose us to numerous risks.

The increased focus on ESG issues has made compliance with regulations, frameworks and stakeholder expectations increasingly complex. Our business faces increased scrutiny from the investment community, clients, employees, potential acquisition targets, regulators and other stakeholders related to our ESG activities. This includes scrutiny regarding our goal to reach Net Zero carbon emissions in our direct operations (Scope 1 and Scope 2) by 2050 and our interim goal of 50% reduction in our Scope 1 and Scope 2 carbon emissions, on a per employee basis, by 2030. We anticipate the same level of scrutiny with respect to any other goals, targets and objectives we may announce in the future, and our methodologies and timelines for pursuing them. Heightened scrutiny has increased the risk that we could be perceived as, or accused of, making inaccurate or misleading statements, commonly referred to as “greenwashing.” If our ESG practices and disclosures do not comply with regulations or align with stakeholder expectations and standards, which are continuously evolving, our reputation, our ability to attract or retain employees and our attractiveness as an investment, business partner or as an acquirer could be negatively impacted. Similarly, our failure or perceived failure to pursue or fulfill our goals, targets and objectives, to comply with ethical, environmental or other standards, regulations or expectations or to satisfy various reporting standards with respect to these matters, could have the same negative impacts, as well as expose us to government enforcement actions and private litigation. See also “We are subject

to regulation worldwide. If we fail to comply with regulatory requirements or if regulations change in a way that adversely affects our operations, we may not be able to conduct our business, or we may be less profitable.”

Our future success depends, in part, on our ability to anticipate and respond effectively to the risks and opportunities presented by digital disruption, “big data” and data analytics, AI and other developments in technology. These may include new applications or insurance-related services based on AI (e.g., generative AI, machine learning), robotics, blockchain, the metaverse or new approaches to data mining that impact the nature of how we generate revenue. We may be exposed to competitive risks related to the adoption and application of new technologies by established market participants (for example, through disintermediation or use of the metaverse) or new entrants such as technology companies, “Insurtech” start-up companies, and others. These new entrants are focused on using technology and innovation in an attempt to simplify and improve the client experience, increase efficiencies, alter business models and effect other potentially disruptive changes in the industries in which we operate. We must also develop and implement technology solutions and technical expertise among our employees that anticipate and keep pace with rapid and continuing changes in technology, industry standards, client preferences and internal control standards. We may not be successful in anticipating or responding to these developments on a timely and cost-effective basis and our ideas may not be accepted in the marketplace. Additionally, the effort to gain technological expertise, make use of data analytics, and develop new technologies in our business requires us to incur significant expenses. Investments in technology systems and data analytics capabilities may not deliver the benefits or perform as expected, or may be replaced or become obsolete more quickly than expected, which could result in operational difficulties or additional costs. If we cannot offer new technologies or data analytics solutions as quickly as our competitors, or if our competitors develop more cost-effective technologies, data analytics solutions or other product offerings, we could experience a material adverse effect on our operating results, client relationships, growth, and compliance programs.

In some cases, we depend on key third-party vendors and partners to provide technology and other support for our strategic initiatives. If these third parties fail to perform their obligations or cease to work with us, our ability to execute on our strategic initiatives could be adversely affected. See also “We are subject to risks associated with AI.”

We are subject to risks associated with AI.

We use AI in our business, including with respect to services provided to our clients. We have internal policies governing the use of AI by our employees designed to protect the company from breaches of data privacy, E&O liability and regulatory enforcement risk; however, our employees could violate these policies and expose us to such risks. Furthermore, our exposure to these risks may increase if our vendors, suppliers, or other third-party providers employ AI in relation to the products or services they provide to us, as we have limited control over such use in third-party products or services. These risks include, among others, the input of confidential information, including material non-public information, in contravention of our policies or contractual restrictions to which any of the foregoing are subject, or in violation of applicable laws or regulations, including those relating to data protection. This could result in such information becoming part of a dataset that is accessible by other third-party AI applications and users.

Additionally, AI heavily relies on the collection and analysis of extensive data sets. Due to the impracticality of incorporating all relevant data into the models used by AI, it is inevitable that data sets within these models will contain inaccuracies and errors, and potential biases. This could potentially render such models inadequate or flawed, negatively impacting the effectiveness of the technology. We are exposed to the risks associated with these inaccuracies, errors and biases, along with the adverse impacts that such flawed models could have on our business and operations. Furthermore, governance and ethical issues relating to the use of AI may also result in reputational harm and liability.

AI and its applications are developing rapidly. The use of this technology by our competitors may give them a competitive advantage that cannot be predicted at this time, and it may negatively affect our assumptions regarding the competitive landscape of our business. Consequently, it is difficult to predict all risks associated with this new technology, which may eventually impact our business, results of operations, or financial condition. See also “Changes in data privacy and protection laws and regulations, or any failure to comply with such laws and regulations, could adversely affect our business and financial results.”

Our success depends, in part, on our ability to attract and retain qualified talent, including our senior management team.

We depend upon members of our senior management team, who possess extensive knowledge and a deep understanding of our business and strategy. We could be adversely affected if we fail to successfully execute our succession plans for these leaders, including our chief executive officer, and if our succession plans are not well-received by our employees and trading partners. We could also be adversely affected if we fail to attract and retain talent and foster a diverse and inclusive workplace throughout our organization. Competition for talent is intense in many areas of our business, particularly in our claims management business, IT and in rapidly developing fields such as AI and data engineering. Furthermore, the increased availability of remote

working arrangements has expanded the pool of companies that compete with us for talent. As competition for skilled professionals remains intense, employers are implementing new offerings to attract talent, including but not limited to increasing compensation, enhancing health and wellness solutions, and providing in-office and remote work options. We may have to devote significant resources to attract and retain talent, which could negatively affect our business, operating results and financial condition.

In addition, our industry has experienced competition for leading brokers and in the past we have lost key brokers and groups of brokers, along with their clients, business relationships and intellectual property directly to our competition. We enter into agreements with many of our brokers and significant client-facing employees and all of our executive officers, which prohibit them from disclosing confidential information and/or soliciting our clients, prospects and employees upon their termination of employment. The confidentiality and non-solicitation provisions of such agreements terminate in the event of a hostile change in control, as defined in the agreements. Although we pursue legal actions for alleged breaches of non-compete or other restrictive covenants, theft of trade secrets, breaches of fiduciary duties, intellectual property infringement and related causes of action, such legal actions may not be effective in preventing such breaches, theft or infringement. In certain cases, our competitors have solicited employees in violation of their employment agreements as a matter of standard business practice, apparently determining that the cost of defending litigation is outweighed by the benefits of acquiring our employees in this manner. In addition, the Federal Trade Commission (FTC) has proposed a rule that would prevent employers from entering into non-competes with employees and require employers to rescind existing non-competes. Furthermore, certain states like Minnesota, North Dakota and Oklahoma have implemented comparable or more stringent regulations, while California has broadened the scope of its longstanding restrictions on non-competes. If this rule goes into effect, more states adopt similar rules or if we fail to adequately address any of the issues referred to above, we could experience a material adverse effect on our business, operating results and financial condition. See also “The substantial increase in remote work among our employees subjects us to certain challenges and risks” below.

The substantial increase in remote work among our employees subjects us to certain challenges and risks.

Many of our employees now work from home on a full- or part-time basis. Remote work for some of our employees could affect their productivity, including due to a lower level of oversight, distractions and disruptions due to caregiving obligations or slower or unreliable Internet access. Remote work may also make some employees feel detached from colleagues and the organization. In some cases, this may make them more vulnerable to solicitations by competing firms. In addition, our increased reliance on work-from-home technologies and our employees’ more frequent use of personal devices and non-standard business processing may increase the risk of cybersecurity or data breaches from circumvention of security systems, denial-of-service attacks or other cyber-attacks, hacking, “phishing” attacks, computer viruses, ransomware, malware, employee or insider error, malfeasance, social engineering, physical breaches or other actions.

The increased prevalence of remote work among our employees may also subject us to other challenges and risks. For example, our hybrid work environment may adversely affect our ability to recruit and retain personnel who prefer a fully remote or fully in-person work environment. Operating our business with both remote and in-person workers, or workers who work on flexible schedules, could have a negative impact on our corporate culture, decrease the ability of our employees to collaborate and communicate effectively, decrease the ability of newer production and support staff to learn client-handling and other key skills informally around the office, decrease innovation and productivity, or negatively affect employee morale.

Business disruptions could have a material adverse effect on our operations, damage our reputation and impact client relationships.

Our ability to conduct business may be adversely affected by a disruption in the infrastructure that supports our business. This includes infrastructure controlled by third-party vendors and suppliers. Such disruptions could be caused by various factors, such as cybersecurity incidents (for example, as disclosed in previous filings, we experienced a ransomware attack in 2020), security breaches, human error, capacity constraints, hardware failures or defects, natural disasters, climate and weather events, pandemics, fires, power outages, telecommunication failures, break-ins, sabotage, intentional acts of vandalism, acts of terrorism, civil disruption, political violence and unrest, or war. While we have disaster recovery procedures in place, they may not be effective. Additionally, insurance may not continue to be available at reasonable prices and may not address all potential losses or compensate us for the possible loss of clients or increase in claims and lawsuits directed against us. Further, because we do not control infrastructure owned by third parties, we cannot guarantee that such parties have effective recovery procedures, or sufficient funds or insurance to recover any damages, losses or other liabilities that we may incur due to business interruptions caused by disruptions to their infrastructure.

The risk of business disruption is more pronounced in certain geographic areas where a significant portion of our business is concentrated. For example, we have substantial operations in India that provide important client support and other back-office services for our global organization. To date, the dispute between India and Pakistan involving the Kashmir region, rising tensions between India and China, incidents of terrorism in India, the potential for civil unrest and general geopolitical uncertainties have not adversely affected our operations in India. However, such factors could potentially affect our operations

there in the future. If our access to these services is disrupted, our client relationships could be harmed, our liability for E&O could increase, and our reputation could be damaged, causing our business, operating results and financial condition to be adversely affected.

Sustained increases in compensation expense and the cost of employee benefits could reduce our profitability.

Compensation expense and the cost of current employees’ medical and other benefits, substantially affects our profitability. In the past, we have occasionally experienced significant increases in these costs as a result of macro-economic factors beyond our control, including wage inflation, increases in health care costs, declines in investment returns on pension assets and changes in discount rates and actuarial assumptions used to calculate pension and related liabilities. Our compensation expense ratio in 2023 as a percent of total revenue remained the same as in 2022 at 56%. A significant decrease in the value of our defined benefit pension plan assets, changes to actuarial assumptions used to determine pension plan liabilities, or decreases in the interest rates used to discount the pension plan’s liabilities could cause an increase in pension plan costs in future years. Although we have actively sought to control increases in compensation expense and the cost of employee benefits, we can make no assurance that we will succeed in limiting future cost increases, and continued upward pressure in these costs could reduce our profitability.

Our substantial operations outside the U.S. expose us to risks different than those we face in the U.S.

In 2023, we generated approximately 36% of our combined brokerage and risk management revenues outside the U.S. Our business outside the U.S. presents operational, economic and other risks that are different from, or greater than, the risks we face doing comparable business in the U.S. These include, among others, risks relating to:

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Maintaining awareness of and complying with a wide variety of labor practices and foreign laws, including those relating to labor and employment, data privacy requirements, AI prohibitions on corrupt payments to government officials, export and import duties, environmental policies, sustainability disclosures, as well as laws and regulations applicable to U.S. business operations abroad. We are subject to the risk that we, our employees, our agents, or our affiliated entities, or their respective officers, directors, employees and agents, take actions determined to be in violation of any of these laws, regulations or policies, for which we might be held responsible. Actual or alleged violations could result in substantial fines, sanctions, civil or criminal penalties, debarment from government contracts, curtailment of operations in certain jurisdictions, competitive or reputational harm, litigation or regulatory action and other consequences that might adversely affect our results of operations, financial condition or strategic objectives. While we believe that relations with work councils and trade unions in these countries are and will continue to be satisfactory, work stoppages could occur and we may not be successful in negotiating new collective bargaining agreements. In addition, collective bargaining negotiations may (1) result in significant increases in the cost of labor, (2) divert management’s attention away from operating the business or (3) break down and result in the disruption of operations. The occurrence of any of the preceding conditions could result in increased costs and impair our ability to operate our business. These and other international regulatory risks and labor related risks are described below under “Regulatory, Legal and Accounting Risks”;

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We own interests in firms where we do not exercise management control (such as Casanueva Perez S.A.P.I. de C.V. in Mexico and Renomia, A.S. in the Czech Republic) and are therefore unable to direct or manage the business to realize the anticipated benefits, including mitigation of risks, that could be achieved through full ownership;

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The potential costs, difficulties and risks associated with local regulations across the globe, including the risk of personal liability for directors and officers (for example, in the U.K.) and “piercing the corporate veil” risks under the corporate law regimes of certain countries;

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Difficulties in staffing and managing foreign operations. For example, we are growing our Latin American operations through acquisitions of local family-owned insurance brokerage firms. If we lose a local key employee, hiring and retaining talent locally or finding an internal candidate qualified to transfer to such location could be difficult;

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Less flexible employee relationships, which in certain circumstances has limited our ability to prohibit employees from competing with us after they are no longer employed with us or recover damages, and made it more difficult and expensive to terminate their employment;

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Some of our foreign subsidiaries receive revenues or incur obligations in currencies that differ from their functional currencies. We must also translate the financial results of our foreign subsidiaries into U.S. dollars. Although we

have used foreign currency hedging strategies in the past and currently have some in place, such risks cannot be eliminated entirely, and significant changes in exchange rates may adversely affect our results of operations;

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Conflicting regulations in the countries in which we do business;

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Political and economic instability (including risks relating to undeveloped or evolving legal systems, unstable governments, acts of terrorism and outbreaks of war, including between Russia and Ukraine, and in the Middle East);

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Coordinating our communications, policies and logistics across geographic distances, multiple time zones and in different languages, including during times of crisis management;

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Risks relating to our post-Brexit plan to address the loss of passporting rights between the U.K. and EU with respect to insurance brokerage services. Our plan (implemented in September 2020) involved transferring the European Economic Area (EEA) clients of our U.K.-based regulated entities to a Swedish subsidiary authorized in the EEA, and providing some services through a U.K. branch of such subsidiary. Although this “reverse branch” model is typical of other brokers of a similar size, EU regulators continue to assess their approach to this model, including as a result of, among other developments, the supervisory statement issued by the European Insurance and Occupational Pensions Authority (EIOPA) in February 2023. While we are continuously assessing the impact of these developments, it is difficult to predict such impact on our current plan;

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Unfavorable audits and exposure to additional liabilities relating to various non-income taxes (such as payroll, sales, use, value-added, net worth, property and goods and services taxes) in foreign jurisdictions. In addition, our future effective tax rates could be unfavorably affected by changes in tax rates, discriminatory or confiscatory taxation, changes in the valuation of our deferred tax assets or liabilities, changes in tax laws or their interpretation and the financial results of our international subsidiaries. The Organization for Economic Cooperation and Development (which we refer to as the OECD) continues to issue reports and recommendations as part of its Base Erosion and Profit Shifting project (which we refer to as BEPS), and in response many countries in which we do business have adopted, or are expected to adopt, rules which will change various aspects of the existing framework under which our tax obligations are determined. For example, the majority of EU countries and the U.K. have incorporated some elements of BEPS Pillar 2 into their national laws. Other countries in which we have significant operations, such as Australia and Canada, have either announced an intention to adopt it or started the process of doing so. Additionally, other jurisdictions in which we do business are also reacting to these efforts; for example, Bermuda enacted a corporate tax regime for the first time in 2023. We anticipate further significant developments across several jurisdictions in which we operate in 2024 and 2025;

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Legal or political constraints on our ability to maintain or increase prices;

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Cash balances held in foreign banks and institutions where governments have not specifically enacted formal guarantee programs;

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Epidemics or pandemics at a regional or global level;

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Lost business or other financial harm due to protectionism in the U.S. and in countries around the world, including adverse trade policies, governmental actions affecting the flow of goods, services and currency, and governmental restrictions on the transfer of funds to us from our operations outside the U.S.; and

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The trade and military policies of the U.S. government could further develop in ways that exacerbate the risks described above, or introduce new risks for our international operations.

If any of these risks materialize, our results of operations and financial condition could be adversely affected.

Changes in tax laws could adversely affect us.

We operate in various jurisdictions and are subject to changes in applicable tax laws, treaties, or regulations in those jurisdictions. A material change in the tax laws, treaties, or regulations, or their interpretation, of any jurisdiction with which we do business, or in which we have significant operations, could adversely affect us. For example, in October 2021, the OECD announced that 136 countries and tax jurisdictions have agreed to implement a new Pillar 2 approach to international taxation. The first detailed draft rules under that approach were published in December 2021. The U.K. and the majority of the EU have adopted some aspects of these rules. Other countries in which we have significant operations, including Australia and Canada, have announced an intention to adopt it or started the process of doing so. The new approach came into effect in 2023 in certain jurisdictions, and different countries have implemented the necessary rules in different ways, through their individual agreement to tax treaty changes and through changes to their own domestic tax laws. Pillar 1 exempts regulated financial institutions and we believe we qualify for such exemption. Pillar 2 will establish a global minimum tax rate of 15%, such that multinational

enterprises with an effective tax rate in a jurisdiction below this minimum rate will need to pay additional tax, which could be collected by the parent company’s tax authorities if that parent country adopts Pillar 2 or by those in other countries, depending on whether and how each country implements the OECD’s approach in its tax treaties and domestic tax legislation. Depending on how the jurisdictions in which we operate, and those in which we and our subsidiaries are based, choose to implement the OECD’s approach in their tax treaties and domestic tax laws, particularly if the U.S. does not adopt Pillar 2, we could be adversely affected due to our income being taxed at higher effective rates, once these new rules come into force.

We face significant competitive pressures in each of our businesses.

The insurance brokerage, reinsurance brokerage and employee benefit consulting businesses are highly competitive and many insurance brokerage, reinsurance brokerage and employee benefit consulting organizations actively compete with us in one or more areas of our business around the world. Two of the firms we compete with in the global brokerage and risk management markets have larger revenues than ours. In addition, many other smaller firms that operate nationally or that are strong in a particular country, region or locality may have, in that country, region or locality, an office with revenues as large as or larger than those of our corresponding local office. Our third party claims administration operation also faces significant competition from stand-alone firms as well as divisions of larger firms. Over the past decade or more, private equity sponsors have invested heavily in the insurance brokerage and third party claims administration industries, creating new competitors and strengthening existing ones. Across all of our operations, Insurtech and technology-based start-ups are entering the business. In most cases, these businesses complement or enhance our offerings, but in some cases, they compete with us.

We believe that the primary factors determining our competitive position with other organizations in our industry are the quality of the services we render, the personalized attention we provide, the individual and corporate expertise of the brokers and consultants providing the actual service to the client, our data and analytics capabilities, and our ability to help our clients manage their overall risk exposure and insurance or reinsurance costs. Losing business to competitors offering similar services or products at a lower cost or having other competitive advantages would adversely affect our business.

Consolidation among our existing competitors could create additional competitive pressure on us as such firms grow their market share, take advantage of strategic and operational synergies and develop lower cost structures. In addition, any increase in competition due to new legislative or industry developments could adversely affect us.

These developments include:

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Increased capital-raising by underwriting enterprises, which could result in new risk-taking capital in the industry, which in turn may lead to lower insurance premiums and commissions;

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Underwriting enterprises selling insurance directly to insureds without the involvement of a broker or other intermediary;

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Changes in our business compensation model as a result of regulatory developments;

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Federal and state governments establishing programs to provide health insurance (such as a single-payer system) or, in certain cases, property insurance in catastrophe-prone areas or other alternative market types of coverage, that compete with, or completely replace, insurance products currently offered by underwriting enterprises;

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Climate-change regulation in the U.S. and around the world moving us toward a low-carbon economy, which could create new competitive pressures around climate resilience consulting services and innovative insurance solutions;

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Continued consolidation in the financial services industry, leading to larger financial services institutions offering a wider variety of services including insurance brokerage and risk management services;

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Increased competition from new market participants such as banks, accounting firms, consulting firms and Internet or other technology firms offering risk management or insurance brokerage services, or new distribution channels for insurance such as payroll firms and professional employer organizations; and

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Third party capital providers have entered the insurance and reinsurance risk transfer market offering products and capital directly to our clients. Their presence in the market increases the competitive pressures that we face.

New competition as a result of these or other legislative or industry developments could cause the demand for our products and services to decrease, which could in turn adversely affect our results of operations and financial condition.

Volatility or declines in premiums or other adverse trends in the insurance industry may seriously undermine our profitability.

We derive much of our revenue from commissions and fees for our brokerage services. We do not determine the premiums on which our commissions are generally based. Moreover, premiums are cyclical in nature and may vary widely based on market

conditions. Because of market cycles for insurance and reinsurance product pricing, which we cannot predict or control, our brokerage revenues and profitability can be volatile or remain depressed for significant periods of time.

As underwriting enterprises continue to outsource the production of premium revenue to non-affiliated brokers or agents such as us, those companies may seek to further minimize their expenses by reducing the commission rates payable to agents or brokers. The reduction of these commission rates, along with general volatility and/or declines in premiums, may significantly affect our profitability. Because we do not determine the timing or extent of premium pricing changes, it is difficult to forecast our commission revenues precisely, including whether they will significantly decline. As a result, we may have to adjust our budgets for future acquisitions, capital expenditures, dividend payments, debt repayments and other expenditures to account for unexpected changes in revenues, and any decreases in premium rates may adversely affect the results of our operations.

In addition, there have been and may continue to be various trends in the insurance and reinsurance markets toward alternative insurance markets including, among other things, greater levels of self-insurance, captives, rent-a-captives, risk retention groups and non-insurance capital markets-based solutions to traditional insurance. While historically we have been able to participate in certain of these activities on behalf of our clients and obtain fee revenue for such services, there can be no assurance that we will realize revenues and profitability as favorable as those realized from our traditional brokerage activities. Our ability to generate premium based commission revenue may also be challenged by the growing desire of some clients to compensate brokers based upon flat fees rather than a percentage of premium. This could negatively impact us because fees are generally not indexed for inflation and might not increase with premiums as commissions do or with the level of service provided.

A meaningful portion of our revenues consists of contingent and supplemental revenues from underwriting enterprises. Contingent revenues are paid after the insurance contract period, generally in the first or second quarter, based on the growth and/or profitability of business we placed with an underwriting enterprise during the prior year. On the other hand, supplemental revenues are paid up front, on an annual or quarterly basis, generally based on our historical premium volumes with the underwriting enterprise and additional capabilities or services we bring to the engagement. While underwriting enterprises generally maintain supplemental revenues in the current year at a pre-determined rate, that rate can change in future years as described above. If, due to the current economic environment or for any other reason, we are unable to meet an underwriting enterprise’s particular profitability, volume or growth thresholds, as the case may be, or such companies increase their estimate of loss reserves (over which we have no control), actual contingent revenues or supplemental revenues could be less than anticipated, which could adversely affect our results of operations. In the case of contingent revenues, under revenue recognition accounting standards, this could lead to the reversal of revenues in future periods that were recognized in prior periods.

We face a variety of risks in our benefit consulting operations distinct from those we face in our insurance brokerage operations.

Our benefit consulting operations face a variety of risks distinct from those faced by our brokerage operations. The portion of our revenue derived from consulting engagements and special project work is more vulnerable to reduction, postponement, cancellation or non-renewal during an economic downturn than traditional insurance brokerage commissions. For instance, we experienced a decline in such revenue during the economic downturn triggered by the COVID-19 pandemic. In the event of a future recession or economic downturn, we could again experience deterioration in these sources of revenue. A portion of our benefit consulting operation revenue is tied to assets invested by our clients, and when investment returns are adversely affected that portion of our revenue is negatively impacted. Certain areas within our retirement consulting practice may attract a higher level of regulatory scrutiny due to regulators’ historical interest in such matters, including pension-related products and investment advisory and broker-dealer services. In addition, we have made significant investments in product and knowledge development to assist clients as they navigate the complex regulatory requirements relating to employer-sponsored healthcare. New laws or regulations reducing employer-sponsored health insurance, by limiting or eliminating tax-advantaged employer-sponsored benefits or otherwise, could impact clients’ demand for our services. If we are unable to adapt our services to changes in the legal and regulatory landscape around employer-sponsored benefits, our results of operations could be adversely impacted.

We closed the acquisition of Buck in April 2023. Buck is the largest acquisition in the history of our benefit consulting operations and represents a material portion of its revenue. As such, the integration of Buck into our existing operations requires

a more significant effort and involves additional risks compared to our typical acquisitions. See also “We face additional risks relating to acquisitions that are larger than our usual tuck-in acquisitions” described above.

We face a variety of risks in our third-party claims administration operations that are distinct from those we face in our brokerage and benefit consulting operations.

Our third party claims administration operations face a variety of risks distinct from those faced by the rest of our business, including the risks that:

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Epidemics and pandemics that reduce in-person business activity have a greater negative impact because they result in a reduction in the number of claims processed, as experienced during the years 2020, 2021, and the beginning of 2022. If a new epidemic or pandemic were to emerge, these operations could face similar negative impacts in the future;

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RISX-FACS®, our proprietary risk management information system, on which our ability to provide clients with insurance claim settlement and administration services is highly dependent, becomes inoperable for some reason. In addition, we are increasing our use of cloud storage and cloud computing application services supported, upgraded and maintained by third-party vendors. A disruption affecting RISX-FACS®, third-party cloud services or any other infrastructure supporting our business, including key client relationship management software, could have a material adverse effect on our operations, cause reputational harm and damage our employee and client relationships;

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The favorable trend among both underwriting enterprises and self-insured entities toward outsourcing various types of claims administration and risk management services will reverse or slow, causing our revenues or revenue growth to decline;

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Concentration of large amounts of revenue with certain clients results in greater exposure to the potential negative effects of lost business due to changes in management at such clients or changes in state government policies, in the case of our government-entity clients, or for other reasons;

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Contracting terms will become less favorable or the margins on our services will decrease due to increased competition, regulatory constraints or other developments;

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We do not satisfy regulatory requirements related to third party administrators or regulatory developments, including those relating to security, cybersecurity and data privacy as we manage a large amount of highly sensitive and confidential information including personally identifiable information, protected health information and financial information, will impose additional burdens, costs or business restrictions that make our business less profitable;

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Volatility in our case volumes, which are dependent upon a number of factors and difficult to forecast accurately, could impact our revenues;

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Wage inflation, difficulty attracting and retaining talent, and rising technology costs, all of which have been challenging to control since 2020, may impact our ability to remain competitive in the marketplace and profitably fulfill our existing contracts (other than those that provide cost-plus or other margin protection);

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We may be unable to develop further efficiencies in our claims-handling business and may be unable to obtain or retain certain clients if we fail to make adequate improvements in technology or operations; and

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Underwriting enterprises or certain large self-insured entities may create in-house servicing capabilities that compete with our third party administration and other administration, servicing and risk management products, and we could face additional competition from potential new entrants into the global claims management services market.

If any of these risks materialize, our results of operations and financial condition could be adversely affected.

Climate change has been widely identified by investors and regulators as a systemic risk to the global economy. The U.S. Federal Reserve has warned that a gradual change in investor sentiment regarding climate risk introduces the possibility of abrupt tipping points or significant swings in sentiment, which could create unpredictable follow-on effects in financial markets. If this occurred, not only would our business be negatively impacted by the general economic decline, but a drop in the stock

market affecting our stock price could negatively impact our ability to grow through mergers and acquisitions financed using our common stock.

The transition to a low-carbon economy could harm specific industries or sectors such as oil and gas in ways that could impact our business. Our clients in such industries could go out of business or have reduced needs for insurance-related or consulting services, which could adversely impact our commission revenues, consulting revenues or revenues from managing third-party insurance claims. Negative publicity arising from our association with clients in disfavored businesses or industries, or the perception that we are not sufficiently focused on climate risks facing Gallagher or on reducing our own carbon emissions, as well as resulting from the potential conflict with anti-ESG initiatives from certain U.S. state governments and other stakeholders, could damage our reputation with investors, clients, employees and regulators. In addition, the transition to a low-carbon economy could give rise to the need for innovative insurance, reinsurance and risk management solutions for entirely new industries and companies, as well as advice and services to bolster climate resilience for existing companies. If we fail to innovate and provide valuable services to our clients in response to these changes, we could lose market share to our competitors or new market entrants that do.

We do not generally assume net underwriting risk, other than with respect to de minimis amounts necessary to provide minimum or regulatory capital, and briefly, in connection with our catastrophe bond business, and thus do not generally experience direct material financial implications related to extreme weather events. In addition, we are a professional services firm with people as our most important asset and limited physical operations. However, in cases where underwriting enterprises fail or face significant payouts related to extreme weather events leading them to withdraw from offering certain lines of coverage, as observed in places such as California, Louisiana, and Florida, such withdrawal negatively impacts the overall capacity for risk-taking capital. If this reduction is substantial, it could limit our ability to secure certain lines of coverage for our clients, ultimately reducing our revenues and profitability. Underwriting enterprises are also clients of Gallagher Re, so any of the negative developments for underwriting enterprises referred to above could also reduce our commission revenues from such clients.

Regulatory, Legal and Accounting Risks

We collect, use, store, transmit and otherwise process, confidential, personal and proprietary information relating to our company, acquisition targets, our employees and our clients. This information includes personally identifiable information, protected health information, financial information and intellectual property.

We maintain policies, procedures and technical safeguards designed to protect the security and privacy of confidential, personal and proprietary information. Nonetheless, we cannot eliminate the risk of human error, malfeasance or highly sophisticated cyber-attacks, which are heightened as a result of the war in Ukraine and in the Middle East or other cybersecurity incidents. It is possible that our security controls, employee training and other aspects of our cybersecurity safeguards are not effective. See “The substantial increase in remote work among our employees subjects us to certain challenges and risks” above for a discussion of how remote work enhances these risks.

We have and continue to invest in technology security initiatives, policies, resources and employee training. The cost and operational consequences of implementing, maintaining and enhancing appropriate technical measures is high. Given the continuously evolving cyber threat landscape, it will become increasingly difficult to detect, defend against and remediate cybersecurity incidents and data breaches. If we are unable to effectively maintain and enhance our system safeguards in line with evolving cyber threats, including in connection with the integration of acquisitions, we may incur unexpected costs, including litigation costs, regulatory enforcement action, loss of clients, reputational damage, and certain of our systems may become more vulnerable to unauthorized access.

We rely on IT and third party vendors to support our business activities, including our secure processing of personal, confidential, sensitive, proprietary and other types of information. Despite ongoing efforts to improve our and our vendors’ ability to protect and defend against cyber-attacks, we may not be able to protect all of our data. Cybersecurity incidents and data breaches of certain systems on which we rely have occurred, such as the ransomware incident that occurred in 2020 (as disclosed in previous filings), and we also have from time to time experienced other cybersecurity incidents such as computer viruses, unauthorized parties gaining access to our information technology systems, and privacy incidents, such as loss or inadvertent transmission of data, although to date we have not been materially impacted by such events. In the future, breaches of any third-party or internal systems may result from circumvention of security systems, denial-of-service, hacking, “phishing”,

computer viruses, ransomware, malware, or other cyber-attacks, employee or insider error, malfeasance, social engineering, physical breaches or other actions. Furthermore, the risk from threat actors has increased due to the rapid development of AI capabilities.

We are an acquisitive organization. The process of integrating information systems of businesses we acquire is complex and exposes us to additional risk as we might not adequately identify weaknesses in the targets’ information systems or information handling, privacy and security policies and protocols, which could expose us to unexpected liabilities or make our own systems and data more vulnerable to cybersecurity incidents. Any future, material cybersecurity or data incident, may cause us to experience unauthorized access, exfiltration, manipulation, corruption, loss or disclosure of our proprietary, client, employee, or other data, reputational harm, the inability to render services due to system outages or other business disruptions, loss of clients and revenue, regulatory action and scrutiny, sanctions or other statutory penalties, litigation, liability for failure to safeguard clients’ information, increases in cybersecurity costs or financial losses. Any of the foregoing may be exacerbated by a delay or failure to detect a cybersecurity incident or the full extent of such incident. In addition, disclosure or media reports of actual or perceived security vulnerabilities to our systems or those of our third-party service providers, even if no breach has been attempted or occurred, could lead to reputational harm, loss of customers and revenue, or increased regulatory actions oversight and scrutiny.

Such incidents could result in confidential, personal or proprietary information being lost or stolen, used to perpetuate fraud, maliciously made public, surreptitiously modified, or rendered inaccessible for a period of time. We cannot ensure that any limitations of liability provisions in our agreements with clients, vendors and other third parties with which we do business would be enforceable or adequate or would otherwise protect us from any liability with respect to claims arising from a cybersecurity, data or similar incident.

As we experienced in connection with the 2020 ransomware incident referred to above, during a cybersecurity incident, we might have to take our systems offline, which could interfere with services to our clients or damage our reputation. While we endeavor to design and implement technologies, policies and procedures to identify such incidents as quickly as possible, any response would take substantial time, and there may be extensive delays before we obtain full and reliable information. During such time we would not necessarily know the extent of the harm or how best to remediate it, and certain errors or actions could be repeated or compounded before they are discovered and remediated, all of which may further increase the costs and consequences of such incident. Any of these losses may not be insured against or be fully covered by insurance we maintain.

In addition, the competition for talent is high in the cybersecurity and privacy space, and we may not be able to hire, develop or retain suitable talent that we need to be capable of minimizing, identifying, mitigating or remediating these risks.

With respect to our commercial arrangements with third party vendors, we have processes designed to require third party IT outsourcing, offsite storage and other vendors to agree to maintain certain standards with respect to their storage, protection and transfer of confidential, personal and proprietary information. However, we remain at risk of a cyber or data incident due to the intentional or unintentional non-compliance by a vendor’s employee or agent, the breakdown of a vendor’s processes, or a cybersecurity incident involving vendor’s information systems. We cannot ensure that any provisions in our agreements with these vendors would be enforceable or adequate or would otherwise protect us from any liability in connection with these incidents.

Any of the foregoing may have a material adverse effect on our business, financial condition and reputation.

We are subject to a number of contingencies and legal proceedings which, if determined unfavorably to us, would adversely affect our financial results.

We are or have been subject to numerous claims, tax assessments, lawsuits and proceedings that arise in the ordinary course of business. Such claims, lawsuits and other proceedings include claims for damages based on allegations that our employees or sub-agents improperly failed to procure coverage, report claims on behalf of clients, provide underwriting enterprises with complete and accurate information relating to the risks being insured, or provide clients with appropriate consulting, advisory, pension and claims handling services. There is the risk that our employees or sub-agents may fail to appropriately apply funds that we hold for our clients on a fiduciary basis. Certain of our benefits and retirement consultants provide investment advisory or decision-making services to clients. Additionally, Gallagher Re operates a securities business. If our clients experience investment losses, our reputation could be damaged and our financial results could be negatively affected as a result of claims asserted against us and lost business. Where appropriate, we have established provisions against these matters that we believe are adequate in light of current information and legal advice, and we adjust such provisions from time to time based on current material developments. The damages claimed in such matters are or may be substantial, including, in many instances, claims for punitive, treble or other extraordinary damages. It is possible that, if the outcomes of these contingencies and legal proceedings

were not favorable to us, it could materially adversely affect our future financial results. In addition, our results of operations, financial condition or liquidity may be adversely affected if, in the future, our insurance coverage proves to be inadequate or unavailable or we experience an increase in liabilities for which we self-insure. We have purchased E&O insurance and other insurance to provide protection against losses that arise in such matters. Accruals for these items, net of insurance receivables, when applicable, have been provided to the extent that losses are deemed probable and are reasonably estimable. These accruals and receivables are adjusted from time to time as current developments warrant.

As more fully described in Note 17 to our 2023 consolidated financial statements, we are a defendant in various legal actions incidental to our business, including but not limited to matters related to employment practices, alleged breaches of non-compete or other restrictive covenants, theft of trade secrets, breaches of fiduciary duties, intellectual property infringement and related causes of action. We are also periodically the subject of inquiries and investigations by regulatory and taxing authorities into various matters related to our business. For example, our micro-captive advisory services business has been under investigation by the IRS since 2013. We currently believe that the ultimate outcome of these proceedings, individually and in the aggregate, will not materially harm our financial position, results of operations or cash flows. However, legal proceedings and government investigations are subject to inherent uncertainties, and unfavorable rulings or other adverse events could occur, including the payment of substantial monetary damages or an injunction or other order prohibiting us from selling one or more products at all or in particular ways, precluding particular business practices or requiring other remedies, which may result in a material adverse impact on our business, results of operations or financial position. In addition, regardless of any unfavorable ruling, any such matter could expose us to negative publicity, reputational damage, harm to our client or employee relationships, or diversion of personnel and management resources, which could adversely affect our ability to recruit quality brokers and other significant employees to our business, and otherwise adversely affect our results of operations.

Changes in data privacy and protection laws and regulations, or any failure to comply with such laws and regulations, could adversely affect our business and financial results.

We are subject to a variety of continuously evolving and developing laws and regulations globally regarding privacy, data protection, and data security, including those related to the collection, storage, handling, use, disclosure, transfer, destruction, and security of personal data. These laws apply to transfers of personal information among our affiliates, as well as to transactions we enter into with third party vendors and clients. Significant uncertainty exists as privacy and data protection laws evolve and may be interpreted and applied differently from country to country and state to state, and may create inconsistent or conflicting requirements. Some of these laws provide rights to individuals to access, correct, and delete their personal information and to obtain copies at the expense of the business entities that process their data. Some of these laws carry heavy penalties for violations, e.g., fines of up to 4% of worldwide revenue under the U.K. Data Protection Act and the European Union General Data Protection Regulation (GDPR) and up to $7,500 per intentional violation under the California Consumer Privacy Act (CCPA). In the U.S., there is pending federal legislation and a number of states have proposed their own comprehensive data privacy bills similar to the GDPR and CCPA, with some of those laws already in effect, and others coming into effect between 2024 and 2026.

India and other countries where we have operations outside the U.S. have proposed or have enacted sweeping data protection laws, and in some cases we are subject to sector and personal data localization laws that may require that data or personal data stay within their borders, such as India's IRDIA (Maintenance of Insurance Records) Regulation, 2015.

In addition, in the U.S., legislators are continuing to enact comprehensive cybersecurity laws. For example, we are subject to the New York State Department of Financial Services Cybersecurity Regulation for Financial Services Companies, which were substantively amended in 2023. We also expect to be subject to a variety of laws and regulations governing AI, such as the proposed EU AI Act which is expected to be enacted in 2024. These laws and regulations are still evolving, and while we are assessing how regulators may apply existing consumer protection, data protection and other similar laws to AI, there is uncertainty regarding the scope of new laws and how existing laws will apply. Due to this uncertainty, we may face challenges complying with existing and new laws, and our policies and governance frameworks may not be successful in mitigating these risks. See also “We are subject to risks associated with AI.”

Adhering to the increased obligations imposed by various new and emerging laws causes us to incur substantial expenses in connection with developing, implementing, and securing our systems and effectively implementing data privacy governance policies for the lawful processing of personal data. Such increased obligations also result in the allocation of additional resources towards new privacy compliance processes and enhanced technologies, further contributing to our IT and compliance costs. In addition, enforcement actions and investigations by regulatory authorities related to data security incidents and privacy violations continue to increase. The enactment of more restrictive laws, rules, regulations, or future enforcement actions or investigations

could impact us through increased costs or restrictions on our business, and noncompliance could result in regulatory penalties and significant legal liability.

In countries outside the U.S., a risk exists that our employees or third parties acting on our behalf, including correspondent brokers, consultants, introducers, partners or agents, could engage in business practices prohibited by applicable laws and regulations, including anti-bribery and anti-corruption laws, and sanctions laws such as those administered by the U.S. Department of the Treasury’s Office of Foreign Assets Control. Anti-bribery and anti-corruption laws, such as the FCPA and the U.K. Bribery Act, generally prohibit companies from making improper payments to foreign officials and require companies to keep accurate books and records and maintain appropriate internal controls. Trade and financial sanctions laws generally restrict the ability to engage in trade with, or provide goods or services, to designated governments or other parties, or may require freezing of such parties’ assets. We operate in some parts of the world that have experienced governmental corruption. In such parts of the world, in certain circumstances, local customs and practice might not be consistent with the requirements of anti-bribery and anti-corruption laws. Similarly, some of these countries do not implement sanctions laws and may not restrict trade with parties designated as sanctions targets under U.S., U.K. or EU laws.

Our policies mandate strict compliance with such laws and we devote substantial resources to programs designed to ensure compliance, including investigating business practices and taking steps to address the risk that our employees, third party representatives, partners or agents will engage in business practices that are prohibited by our policies and/or such laws and regulations.

We offer client service capabilities in many countries around the world through a network of third-party representatives acting on our behalf such as correspondent brokers and consultants. In certain limited instances, we also work with third-party introducers that provide services for certain clients. There is a risk that our third party representatives engage in business practices that are prohibited by our internal policies or violate applicable laws and regulations, such as the FCPA and the U.K. Anti-Bribery Act. As previously disclosed, during 2022, we received a subpoena from the FCPA Unit of the DOJ seeking information related to our insurance business with public entities in Ecuador. During the fourth quarter of 2023, the DOJ informed us that it has closed its inquiry and would not be pursuing enforcement action against us.

Violations by us or our third party representatives could result in significant internal investigation costs and legal fees, civil and criminal penalties, including prohibitions on the conduct of our business, and reputational harm.

We may also be subject to legal liability and reputational damage if we violate trade sanctions laws of the U.S., the EU and other jurisdictions in which we operate. In addition, FATCA requires certain of our subsidiaries, affiliates and other entities to obtain valid FATCA documentation from payees prior to remitting certain payments to such payees and our failure to do so properly could result in penalties.

Many of our activities throughout the world, especially regulated businesses such as our insurance brokerage, securities broker-dealer and investment advisory services, are subject to supervision and regulations promulgated by regulatory or self-regulatory bodies such as the SEC, the NYSE, the DOJ, the IRS, the Financial Crimes Enforcement Network, the FTC and FINRA in the U.S., the Financial Conduct Authority in the U.K., the Australian Securities and Investments Commission in Australia and insurance regulators in nearly every jurisdiction in which we operate. Our retirement-related consulting and investment advisory services are subject to pension law and financial regulation in many countries. Our activities are also subject to a variety of other laws, rules and regulations addressing licensing, data privacy, AI, wage-and-hour standards, employment and labor relations, competition, anti-corruption, currency, the conduct of business, reserves and the amount of local investment with respect to our operations in certain countries. For example, the DOJ revised its Corporate Criminal Enforcement Policies and Practices to include a section on the use of personal devices and third-party messaging applications, indicating that their use poses significant risk to companies and suggesting that it intends to investigate seriously whether companies have ensured that data from these sources is preserved for investigations; additionally, the FTC proposed a rule that would prevent employers from entering into non-competes with employees and require employers to rescind existing non-competes. These and other forms of regulatory action could reduce our profitability or growth by increasing the costs of compliance, increasing the risk of costly enforcement actions, restricting the products or services we sell, the markets we enter, the methods by which we sell our products and services, or the prices we can charge for our services and the form of compensation we can accept from our clients, underwriting

enterprises and third parties. As our operations grow around the world, it is increasingly difficult to monitor and enforce regulatory compliance across the organization. A compliance failure by even one of our smallest branches could lead to a loss of reputation in the local market, and litigation and/or disciplinary actions that may include compensating clients for loss, the imposition of penalties, and/or the loss of our authorization to operate. In all such cases, we would also likely incur significant internal investigation costs and legal fees.

The global nature of our operations increases the complexity and cost of compliance with laws and regulations, including increased staffing needs, the development of new policies, procedures and internal controls and providing training to employees in multiple locations, adding to our cost of doing business. Many of these laws and regulations may have differing or conflicting legal standards across jurisdictions, increasing further the complexity and cost of compliance. In emerging markets and other jurisdictions with less developed legal systems, local laws and regulations may not be established with sufficiently clear and reliable guidance to provide us with adequate assurance that we are aware of all necessary licenses to operate our business, that we are operating our business in a compliant manner, or that our rights are otherwise protected. In addition, major political and legal developments in jurisdictions in which we do business may lead to new regulatory costs and challenges. For example, China adopted a “blocking” statute similar to that of the EU requiring compliance with certain Chinese laws if they conflict with U.S. laws. Rising global tensions and protectionism may also lead other countries to adopt similar blocking statutes, which could make it more difficult and costly for us to expand our operations globally.

Changes in legislation or regulations and actions by regulators, including changes in administration and enforcement policies, or the failure of state and local governments to follow through on agreed-upon state and local tax credits or other tax related incentives, could adversely affect our results of operations or require operational changes that could result in lost revenues or higher costs or hinder our ability to operate our business.

For example, the method by which insurance brokers are compensated has received substantial scrutiny in the past because of the potential for conflicts of interest. The potential for conflicts of interest arises when a broker is compensated by two parties in connection with the same or similar transactions. The vast majority of the compensation we receive for our work as insurance and reinsurance brokers is in the form of retail commissions and fees. We receive additional revenue from underwriting enterprises, separate from retail commissions and fees, including, among other things, contingent and supplemental revenues and payments for consulting and analytics services we provide them. Future changes in the regulatory environment may impact our ability to collect these revenues. Adverse regulatory, legal or other developments regarding these revenues could have a material adverse effect on our business, results of operations or financial condition, expose us to negative publicity and reputational damage and harm our relationships with clients, underwriting enterprises or other business partners.

In addition, as regulators and investors increasingly focus on climate change and other sustainability issues, we are exposed to the risk of frameworks and regulations being adopted that require significant effort to comply with and which are ill-adapted to our operations. For example, pursuant to the CSRD, in 2023 the first set of EU sustainability reporting standards (which we refer to as ESRS) has been developed by the European Financial Reporting Advisory Group (which we refer to as EFRAG) and adopted by the EU. EFRAG will continue to issue sector-specific and non-EU applicable ESRS in the coming years, with such standards to be tailored to EU policy positions which may be different or contradictory with those applicable to our business in other jurisdictions. The CSRD is expected to entail substantial disclosure obligations in future years for us and some of our EU subsidiaries. The SEC has also proposed new climate change disclosure requirements, which are expected to become effective in 2024. Additionally, the state of California has enacted disclosure rules similar to the SEC rules, which will become effective between 2024 and 2026. Furthermore, in the U.K., our business is subject to a number of disclosure obligations under different sustainability frameworks, such as the Task Force on Climate-Related Financial Disclosures framework; Australia is planning to enact mandatory disclosures based on the International Sustainability Standards Board standards (which we refer to as ISSB) in 2024; and other jurisdictions, such as Canada and Brazil, have also announced that they plan to implement ISSB-based disclosures. Compliance with such rules and frameworks will require significant effort and could divert management’s attention and resources, which could adversely affect our operating results.

Changes in our accounting estimates and assumptions could negatively affect our financial position and operating results.

We prepare our financial statements in accordance with U.S. generally accepted accounting principles (which we refer to as GAAP). These accounting principles require us to make estimates and assumptions that affect the reported amounts of assets and liabilities, and the disclosure of contingent assets and liabilities at the date of our consolidated financial statements. We are also required to make certain judgments and estimates that affect the disclosed and recorded amounts of revenues and expenses related to revenue recognition and deferred costs - see Note 4 to our 2023 consolidated financial statements. We periodically evaluate our estimates and assumptions, including those relating to the valuation of goodwill and other intangible assets, investments, income taxes, revenue recognition, deferred costs, stock-based compensation, claims handling obligations, retirement plans, litigation and contingencies. We base our estimates on historical experience and various assumptions that we

believe to be reasonable based on specific circumstances. Such estimates and assumptions could change in the future as more information becomes known, which could impact the amounts reported and disclosed in our consolidated financial statements. Further, in August 2022, the U.S. enacted tax legislation commonly referred to as the Inflation Reduction Act (which we refer to as the IRA) which, among other things, implements a corporate book minimum tax and an excise tax on stock buy backs beginning for years after 2022. While guidance is still being issued, our current understanding of these new rules suggests that we will not face significant impacts from these changes. As additional guidance relating to the IRA is released, our estimates related to the IRA may change. Additionally, changes in accounting standards (see Note 2 to our 2023 consolidated financial statements) could increase costs to the organization and could have an adverse impact on our future financial position and results of operations.

Limited protection of our intellectual property could harm our business and our ability to compete effectively, and we face the risk that our services or products may infringe upon the intellectual property rights of others. We cannot guarantee that trade secret, trademark and copyright law protections, or our internal policies and procedures regarding our management of intellectual property, are adequate to deter misappropriation of our intellectual property. Existing laws of some countries in which we provide services or products may offer only limited protection of our intellectual property rights. Also, we may be unable to detect the unauthorized use of our intellectual property and take the necessary steps to enforce our rights, which may have a material adverse impact on our business, financial condition or results of operations. We cannot be sure that our services and products, or the products of others that we offer to our clients, do not infringe on the intellectual property rights of third parties, and we may have infringement claims asserted against us or our clients. These claims may harm our reputation, result in financial liability, consume financial resources to pursue or defend, and prevent us from offering some services or products. In addition, these claims, whether with or without merit, could be expensive, take significant time and divert management’s focus and resources from business operations. Successful challenges against us could require us to modify or discontinue our use of technology or business processes where such use is found to infringe or violate the rights of others, or require us to purchase licenses from third parties, any of which could adversely affect our business, financial condition and operating results.

Risks Relating to our Investments, Debt and Common Stock

Our clean energy investments are subject to various risks and uncertainties.

We generated tax credits under IRC Section 45 from 2009 to 2021. As of December 31, 2023, we had generated a total of $1,706.1 million in IRC Section 45 tax credits, of which approximately $891.4 million have been used to offset U.S. federal tax liabilities and $814.7 million remain unused and available to offset future U.S. federal tax liabilities.

Our ability to use tax credits under IRC Section 45 depends upon the operations in which we invested having satisfied the conditions set forth in IRC Section 45. These include, among others, the “placed-in-service” condition and requirements relating to qualified emissions reductions, coal sales to unrelated parties and at least one of the operations’ owners qualifying as a “producer” of refined coal. While we have received some degree of confirmation from the IRS relating to our ability to claim these tax credits, the IRS could ultimately determine that the operations did not satisfy the conditions set forth in IRC Section 45. The ongoing implementation of Pillar 2 in the U.S. and around the world could also negatively impact our ability to use these tax credits in the timeframe and manner that would be beneficial to us. Similarly, the law permitting us to claim IRC Section 29 tax credits (related to our prior synthetic coal operations) expired on December 31, 2007. At December 31, 2023, we had exposure with respect to $108.0 million of previously earned tax credits under IRC Section 29. We believe our claim for IRC Section 29 tax credits in 2007 and prior years was in accordance with IRC Section 29 and four private letter rulings previously obtained by IRC Section 29 related limited liability companies in which we had an interest. We understand these private letter rulings were consistent with those issued to other taxpayers and we have received no indication from the IRS that it will seek to revoke or modify them. In addition, the IRS audited certain of the IRC Section 29 facilities without requiring any changes.

While none of our prior IRC Section 29 operations are currently under audit, two of the IRC Section 45 operations in which we are invested are under audit by the IRS, and it has taken the position that certain losses and tax credits should be disallowed. We are defending this matter vigorously. Additionally, one of these partnerships received a notice from the IRS disallowing our co-investors from claiming tax credits. The partnership defended its position in tax court and prevailed in August 2019. The decision was affirmed by the D.C. Court of Appeals. The IRS could place the remaining IRC Section 45 operations and any of the prior IRC Section 29 operations under audit. An adverse outcome with respect to our ability to claim tax credits under any such audit would likely cause a material loss or cause us to be subject to liability under indemnification obligations related to prior sales of partnership interests in IRC Section 29 tax credits.

There is a risk that foreign laws will not protect the intellectual property associated with The Chem-ModTM Solution to the same extent as U.S. laws, leaving us vulnerable to companies outside the U.S. who may attempt to copy such intellectual property. In addition, other companies may make claims of intellectual property infringement with respect to The Chem-ModTM Solution.

For example, in July 2019, Midwest Energy Emissions Corp. and MES Inc. (which we refer to together, as Midwest Energy) filed a patent infringement lawsuit in the United States District Court for the District of Delaware against us, Chem Mod LLC and numerous other related and unrelated parties. The complaint alleged that the named defendants infringed patents held exclusively by Midwest Energy and sought unspecified damages and injunctive relief. In 2023, we settled this matter for an amount that was not material and without admitting any wrongdoing. However, litigation is inherently uncertain and it is not possible for us to predict the ultimate outcome of any future claims against us by other parties.

The IRC Section 45 operations in which we have invested and the by-products from such operations may result in environmental and product liability claims and environmental compliance costs.

The construction and operation of the IRC Section 45 operations were subject to federal, state and local laws, regulations and potential liabilities arising under or relating to the protection or preservation of the environment, natural resources and human health and safety. Some environmental laws, without regard to fault or the legality of a party’s conduct, impose liability on certain entities that are considered to have contributed to, or are otherwise responsible for, the release or threatened release of hazardous substances into the environment. One party may, under certain circumstances, be required to bear more than its share or the entire share of investigation and cleanup costs at a site if payments or participation cannot be obtained from other responsible parties. By having used The Chem‐ModTM Solution at locations owned and operated by others, we and our partners may be exposed to the risk of being held liable for environmental damage from releases of hazardous substances we may have had little, if any, involvement in creating. Such risk remains even after production ceases at an operation to the extent the environmental damage can be traced to the types of chemicals or compounds used or operations conducted in connection with The Chem-ModTM Solution. Increasing attention to global climate change has resulted in an increased possibility of regulatory attention and private litigation. For example, claims have been made against certain energy companies alleging that greenhouse gas emissions constitute a public nuisance. In addition to the possibility of our being named in such actions, we and our partners could face the risk of environmental and product liability claims related to concrete incorporating fly ash produced using The Chem-ModTM Solution. No assurances can be given that contractual arrangements and precautions taken to provide for assumption of these risks by facility owners or operators, or other end users, will result in that facility owner or operator, or other end user, accepting full responsibility for any environmental or product liability claim. Nor can we or our partners be certain that facility owners or operators, or other end users, fully complied with all applicable laws and regulations, and this could result in environmental or product liability claims. It is also not uncommon for private claims by third parties alleging contamination to also include claims for personal injury, property damage, nuisance, diminution of property value, or similar claims. Furthermore, many environmental, health and safety laws authorize citizen suits, permitting third parties to make claims for violations of laws or permits. Our insurance may not cover all environmental risk and costs or may not provide sufficient coverage in the event of an environmental or product liability claim, and defense of such claims can be costly, even when such defense prevails. If significant uninsured losses arise from environmental or product liability claims, or if the costs of environmental compliance increase for any reason, our results of operations and financial condition could be adversely affected.

We have debt outstanding that could adversely affect our financial flexibility and subjects us to restrictions and limitations that could significantly impact our ability to operate our business.

As of December 31, 2023, we had total consolidated debt outstanding of approximately $8.0 billion. The level of debt outstanding each period could adversely affect our financial flexibility. We also bear risk at the time our debt matures. Our ability to make interest and principal payments, to refinance our debt obligations and to fund our acquisition program and planned capital expenditures will depend on our ability to generate cash from operations. This, to a certain extent, is subject to general economic, financial, competitive, legislative, regulatory and other factors that are beyond our control, such as an environment of rising interest rates. A small portion of our private placement debt consists of floating rate notes, and interest payments under our senior revolving credit facility are based on a floating rate which exposes us to the risk of a changing or unknown rate environment. Our indebtedness will also reduce the ability to use that cash for other purposes, including working capital, dividends to stockholders, acquisitions, capital expenditures, share repurchases, and general corporate purposes. If we cannot service our indebtedness, we may have to take actions such as selling assets, issuing additional equity or reducing or delaying capital expenditures, strategic acquisitions, and investments, any of which could impede the implementation of our business strategy or prevent us from entering into transactions that would otherwise benefit our business. Additionally, we may not be able to effect such actions, if necessary, or refinance any of our indebtedness on commercially reasonable terms, or at all.

The agreements governing our debt include covenants that, among other things, restrict our ability to dispose of assets, incur additional debt, engage in certain asset sales, mergers, acquisitions or similar transactions, create liens on assets, engage in certain transactions with affiliates, change our business or make investments, and require us to comply with certain financial and legal covenants. The restrictions in the agreements governing our debt may prevent us from taking actions that we believe would be in the best interest of our business and our stockholders and may make it difficult for us to execute our business strategy successfully or effectively compete with companies that are not similarly restricted. We may also incur future debt obligations

that might subject us to additional or more restrictive covenants that could affect our financial and operational flexibility, including our ability to pay dividends. We cannot make any assurances that we will be able to refinance our debt or obtain additional financing on terms acceptable to us, or at all. A failure to comply with the restrictions under the agreements governing our debt could result in a default under the financing obligations or could require us to obtain waivers from our lenders for failure to comply with these restrictions. The occurrence of a default that remains uncured or the inability to secure a necessary consent or waiver could cause our obligations with respect to our debt to be accelerated and have a material adverse effect on our financial condition and results of operations.

Our reinsurance securities business serves from time to time as the underwriter and initial purchaser of securities (such as catastrophe bonds) issued by our reinsurance company clients. This involves us, acting as an intermediary, to use our capital on hand and short-term borrowings to cover the purchase price of the securities. We place the securities with investors and use the funds we receive from them to repay our obligations. Risks specific to these short-term borrowings include counterparty risk (which is the risk that arises due to uncertainty about a counterparty’s ability to meet its obligations) with respect to the investors. Non-performance by any of our counterparties in these transactions for financial or other reasons could potentially expose us to material losses.

Credit rating downgrades would increase our financing costs and could subject us to operational risk.

If we need to raise capital in the future (for example, in order to maintain adequate liquidity, fund maturing debt obligations or finance acquisitions or other initiatives), credit rating downgrades would increase our financing costs, and could limit our access to financing sources. We would also face the risk of a credit rating downgrade if we do not retire or refinance the debt to levels acceptable to the credit rating agencies in a timely manner. Further, a downgrade to a rating below investment-grade could result in greater operational risks through increased operating costs and increased competitive pressures.

We are a holding company and, therefore, may not be able to receive dividends or other distributions in needed amounts from our subsidiaries.

We are organized as a holding company, a legal entity separate and distinct from our operating subsidiaries. As a holding company without significant operations of our own, we are dependent upon dividends and other payments from our operating subsidiaries to meet our obligations for paying principal and interest on outstanding debt obligations, for paying dividends to stockholders, repurchasing our common stock and for corporate expenses. In the event our operating subsidiaries are unable to pay sufficient dividends and other payments to us, we may not be able to service our debt, pay our obligations, pay dividends on or repurchase our common stock.

Further, we derive a meaningful portion of our revenue and operating profit from operating subsidiaries located outside the U.S. Since the majority of financing obligations as well as dividends to stockholders are paid from the U.S., it is important to be able to access the cash generated by our operating subsidiaries located outside the U.S. in the event we are unable to meet these U.S. based cash requirements.

Funds from our operating subsidiaries outside the U.S. may be repatriated to the U.S. via stockholder distributions and intercompany financings, where necessary. A number of factors may arise that could limit our ability to repatriate funds or make repatriation cost prohibitive, including, but not limited to the imposition of currency controls and other government restrictions on repatriation in the jurisdictions in which our subsidiaries operate, fluctuations in foreign exchange rates, the imposition of withholding and other taxes on such payments and our ability to repatriate earnings in a tax-efficient manner.

In the event we are unable to generate or repatriate cash from our operating subsidiaries for any of the reasons discussed above, our overall liquidity could deteriorate and our ability to finance our obligations, including to pay dividends on or repurchase our common stock, could be adversely affected.

Future sales or other dilution of our equity could adversely affect the market price of our common stock.

An important way we grow our business is through acquisitions. One method of acquiring companies or otherwise funding our corporate activities is through the issuance of additional equity securities. The issuance of any additional shares of common or of preferred stock or convertible securities could be substantially dilutive to holders of our common stock. Moreover, to the extent that we issue restricted stock units, performance stock units, options or warrants to purchase shares of our common stock in the future and those options or warrants are exercised or as the restricted stock units or performance stock units vest, our stockholders will experience further dilution. In November 2022, we established an "at the market" equity offering program (which we refer to as an ATM program) pursuant to which we may offer and sell up to 3,000,000 shares of our common stock. We have refreshed our ATM program in the past and expect to refresh our ATM program periodically. Sales under our ATM

program will result in additional dilution for our stockholders. Holders of our common stock have no preemptive rights that entitle holders to purchase their pro rata share of any offering of shares of any class or series and, therefore, such sales or offerings could result in increased dilution to our stockholders. The market price of our common stock could decline as a result of sales of shares of our common stock or the perception that such sales could occur.

Item 1B. Unresolved Staff Comments.

Not applicable.

Item 1C. Cybersecurity.

We have implemented a cybersecurity program to assess, identify, and manage risks from cybersecurity threats that could adversely and materially affect the confidentiality, integrity, and availability of our information and information systems. We maintain administrative, technical, and physical safeguards designed to protect the security and privacy of confidential, personal and proprietary information. Our cybersecurity program is aligned with notable control frameworks such as the NIST CSF (National Institute of Standard and Technology Cybersecurity Framework) and ISO (International Organization for Standardization) 27001.

Our cybersecurity program leverages people, processes, and technology to identify and respond to cybersecurity threats. We have a global incident response capability. We also have established a dedicated vendor assessment team, which employs systems and processes designed to oversee, identify, and reduce the potential impact of a security incident at a third-party vendor, service provider or customer or otherwise implicating the third-party technology and systems we use, as well as a global training and awareness program. We also continuously test and assess our cybersecurity posture, including through annual third-party risk assessments performed by reputable assessors, consultants and auditors. A global FAIR (Factor Analysis of Information Risk) assessment is conducted at least annually to update our cybersecurity risks and corresponding mitigations.

Our Chief Information Security Officer (CISO), working together with our Chief Information Officer (CIO), oversees a team of employees dedicated to cybersecurity. Our CISO receives ongoing updates from the cybersecurity team regarding the prevention, detection, mitigation, and remediation of cybersecurity incidents and regularly reports to the CIO. Our CISO is an active member of our management-level enterprise risk management committee, which has broad oversight of the company’s enterprise risks, including cybersecurity risks. In addition, our CIO and CISO both attend regular meetings of the executive officer team, including our Chief Executive Officer, Chief Financial Officer and other senior executive officers, dedicated to compliance and risk, and report on cybersecurity matters as appropriate. Our Board of Directors has delegated primary responsibility for the oversight of cybersecurity matters to the Risk and Compliance Committee; however, the full board reviews significant cybersecurity matters as appropriate. Our CIO and CISO report on cybersecurity and information security at each meeting of the Risk and Compliance Committee.

Our CIO has more than 30 years of experience, including from his prior business and technology leadership roles at Aegon N.V., Citigroup, Inc. and JP Morgan Chase & Company. Our CISO has more than 20 years of cybersecurity experience. Prior to joining us he was Senior Vice President, Chief Information Security Officer at Brighthouse Financial, served as Technology Vice President & Chief Information Security Officer for GE Healthcare and started his career at Allstate Insurance Company. He also holds security, privacy and risk certifications, including Certified Information Systems Auditor, Certified Information Security Manager and Certified Information Systems Security Professional.

To date, risks from cybersecurity threats, including as a result of any previous cybersecurity incidents, have not materially affected us, including our business strategy, results of operations or financial condition, and we do not believe that such risks are reasonably likely to have such an effect over the long term. However, due to evolving cybersecurity threats, we may not be able to protect all information systems and, as an acquisitive organization, integrating information systems as we acquire new businesses may expose us to unexpected liabilities or increase our vulnerability. Additional information on cybersecurity risks we face is discussed in Item 1A of Part I, “Risk Factors,” which should be read in conjunction with the foregoing information.

Item 2. Properties.

The executive offices of our corporate segment and certain subsidiary and branch facilities of our brokerage and risk management segments are located at 2850 Golf Road, Rolling Meadows, Illinois, where we own approximately 360,000 square feet of space, and can accommodate 2,000 employees at peak capacity.

Elsewhere, we generally operate in leased premises related to the facilities of our brokerage and risk management operations. We prefer to lease office space rather than own real estate related to the branch facilities of our brokerage and risk management segments. Certain of our office space leases have options permitting renewals for additional periods. In addition to minimum fixed rentals, a number of our leases contain annual escalation clauses generally related to increases in an inflation index. See

Notes 15 and 17 to our 2023 consolidated financial statements for information with respect to our lease commitments as of December 31, 2023.

Item 3. Legal Proceedings.

Please see the information set forth in Note 17 to our consolidated financial statements, included herein, under “Litigation, Regulatory and Taxation Matters.”

Item 4. Mine Safety Disclosures.

Not applicable.

Information About Our Executive Officers

Set forth below are the names, ages, positions and business backgrounds of our executive officers as of the date hereof:

Name Age Position and Year First Elected

Walter D. Bay 61 Corporate Vice President, General Counsel, Secretary since 2007

With the exception of Mr. Bloom, we have employed each such person principally in management capacities for more than the past five years. All executive officers are appointed annually and serve at the discretion of our board of directors.

Part II

Item 5. Market for the Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities.

Our common stock is listed on the New York Stock Exchange, trading under the symbol “AJG.”

As of January 31, 2024, there were approximately 1,000 holders of record of our common stock.

(c)

Issuer Purchases of Equity Securities

The following table shows the purchases of our common stock made by or on behalf of us or any “affiliated purchaser” (as such term is defined in Rule 10b-18(a)(3) under the Securities Exchange Act of 1934, as amended) of us for each fiscal month in the three-month period ended December 31, 2023:

(1)

Amounts in this column include shares of our common stock purchased by the trustees of trusts established under our Deferred Equity Participation Plan (which we refer to as the DEPP), our Deferred Cash Participation Plan (which we refer to as the DCPP) and our Supplemental Savings and Thrift Plan (which we refer to as the Supplemental Plan), respectively. These plans are considered to be unfunded for purposes of federal tax law since the assets of these trusts are available to our creditors in the event of our financial insolvency. The DEPP is an unfunded, non-qualified deferred compensation plan that generally provides for awards to certain of our key executives that do not vest and/or distribute until participants reach age 62 (or the one-year anniversary of the date of grant for participants over the age of 61). Under sub‐plans of the DEPP for certain production staff, the plan generally provides for vesting and/or distributions no sooner than five years from the date of awards, although certain awards vest and/or distribute after the earlier of fifteen years or the participant reaching age 65. See Note 11 to our 2023 consolidated financial statements for more information regarding the DEPP. The DCPP is an unfunded, non-qualified deferred compensation plan for certain key employees, other than executive officers, that generally provides for vesting and/or distributions no sooner than five years from the date of awards. Under the terms of the DEPP and the DCPP, we may contribute cash to the trust and instruct the trustee to acquire a specified number of shares of our common stock on the open market or in privately negotiated transactions. For the fourth quarter of 2023, we instructed the trustee for the DEPP and the DCPP to reinvest dividends on shares of our common stock held by these trusts and to purchase our common stock using cash that we contributed to the DCPP related to 2023 awards under the DCPP. The Supplemental Plan is an unfunded, non-qualified deferred compensation plan that allows certain highly compensated employees to defer compensation, including company match amounts, on a before-tax basis or after-tax basis. Under the terms of the Supplemental Plan, all amounts credited to an employee’s account may be deemed invested, at the employee’s election, in a number of investment options that include various mutual funds, an annuity product and a fund representing our common stock. When an employee elects to have some or all of the amounts credited to the employee’s account under the Supplemental Plan deemed to be invested in the fund representing our common stock, the trustee of the trust for the Supplemental Plan purchases shares of our common stock in a number sufficient to ensure that the trust holds a number of shares of our common stock with a value equal to the amounts deemed invested in the fund representing our common stock. This is to ensure that at the time when an employee becomes entitled to a distribution under the terms of the Supplemental Plan, any amounts deemed to be invested in the fund representing our common stock are distributed in the form of shares of our common stock held by the trust. We established the trusts for the DEPP, the DCPP and the Supplemental Plan to assist us in discharging our deferred compensation obligations under these plans. All assets of these trusts, including any shares of our common stock purchased by the trustees, remain, at all times, assets of the Company, subject to the claims of our creditors in the event of our financial insolvency. The terms of the DEPP, the DCPP and the Supplemental Plan do not provide for a specified limit on the number of shares of common stock that may be purchased by the respective trustees of the trusts.

(2)

The average price paid per share is calculated on a settlement basis and does not include commissions.

(3)

Effective July 28, 2021, the board of directors approved a common stock repurchase plan of up to $1.5 billion of common stock. Repurchases of common stock may be effected from time to time through open market purchases, trading plans established in accordance with the U.S. Securities and Exchange Commission’s rules, accelerated stock repurchases, private transactions or other means, depending on satisfactory market conditions, applicable legal requirements and other factors. The repurchase plan has no expiration date and we are under no commitment or obligation to repurchase any particular amount of our common stock under the plan. At our discretion, we may suspend the repurchase plan at any time.

(4)

Dollar values stated in millions.

Item 6. [Reserved].

Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations.

Introduction

The following discussion and analysis should be read in conjunction with our consolidated financial statements and the related notes included in Item 8 of this annual report. In addition, please see “Information Regarding Non-GAAP Measures and Other” beginning on page 38 for a reconciliation of the non-GAAP measures for adjusted total revenues, organic commission, fee and supplemental revenues and adjusted EBITDAC to the comparable GAAP measures, as well as other important information regarding these measures.

We are engaged in providing insurance brokerage, reinsurance brokerage, consulting services, and third-party property/casualty claims settlement and administration services to entities and individuals around the world. We believe that one of our major strengths is our ability to deliver comprehensively structured insurance and risk management services to our clients. Our brokers, agents and administrators act as intermediaries between underwriting enterprises and our clients and we do not assume net underwriting risks. We are headquartered in Rolling Meadows, Illinois, and provide brokerage, risk management and consulting services in approximately 130 countries around the world through our owned operations and a network of correspondent brokers and consultants. In 2023, we expanded, and expect to continue to expand, our international operations through both acquisitions and organic growth. We generate approximately 64% of our revenues for the combined brokerage and risk management segments domestically, with the remaining 36% generated internationally, primarily in the Australia, Canada, New Zealand and the U.K. (based on 2023 revenues). We have three reportable segments: brokerage, risk management and corporate. Brokerage and risk management contributed approximately 86% and 14%, respectively, to 2023 revenues. The corporate segment generated revenues from our clean energy investments until 2022, during which we ran-off existing chemical supplies as part of the wind down of such investments’ operations, after our ability to generate additional tax credits from qualified refined coal pursuant to IRC Section 45 ended in December 2021. Our major sources of operating revenues are commissions, fees and supplemental and contingent revenues from brokerage operations and fees from risk management operations. Investment income is generated from invested cash and fiduciary funds, clean energy investments (prior to 2022), and revenue from premium financing.

Prior Year Discussion of Results and Comparisons

For information on fiscal 2022 results and similar comparisons, see "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations" of our Form 10-K for the fiscal year ended December 31, 2022.

Summary of Financial Results - Year Ended December 31,

See the reconciliations of non-GAAP measures on page 36.

(In millions, except per share data)

Brokerage Segment

Adjusted EBITDAC margin 34.3 % 34.0 % +31 bpts

Risk Management Segment

Net earnings margin (before reimbursements) 12.0 % 10.6 % +136 bpts

Adjusted EBITDAC margin (before reimbursements) 20.0 % 18.5 % +158 bpts

Corporate Segment

Diluted net loss per share $ (1.58 ) $ (1.37 ) $ (0.93 ) $ (1.02 )

Total Company

Total Brokerage and Risk Management Segment

In our corporate segment, net after-tax (loss) earnings from our clean energy investments was $(11.5) million and $(9.2) million in 2023 and 2022, respectively. At this time, we anticipate our clean energy investments will produce after-tax losses in 2024.

The following provides information that management believes is helpful when comparing revenues before reimbursements, net earnings, EBITDAC and diluted net earnings per share for 2023 and 2022. In addition, these tables provide reconciliations to the most comparable GAAP measures for adjusted revenues, adjusted EBITDAC and adjusted diluted net earnings per share. Reconciliations of EBITDAC for the brokerage and risk management segments are provided on pages 42 and 48 of this filing.

Year Ended December 31 Reported GAAP to Adjusted Non-GAAP Reconciliation:

(In millions, except per share data)

Effective income tax rate impact — — — (26.0 ) — — — (0.13 )

Levelized foreign currency translation — (25.1 ) — (13.8 ) — (18.2 ) — (0.06 )

Net gains on divestures (0.4 ) (0.9 ) (0.3 ) (0.6 ) (0.4 ) (0.9 ) — —

Acquisition related adjustments — — 0.4 (5.8 ) 0.5 0.4 — (0.03 )

Amortization of intangibles assets — — 5.6 4.6 — — 0.03 0.02

Levelized foreign currency translation — (4.9 ) — (0.7 ) — (0.9 ) — —

Corporate related adjustments

Total Brokerage and Risk

* For the year ended December 31, 2023, the pretax impact of the brokerage segment adjustments totals $1,192.0 million, mostly due to non-cash period expenses related to intangible amortization and acquisition earnout payable adjustments, with a corresponding adjustment to the provision for income taxes of $295.6 million relating to these items. For the year ended December 31, 2023, the pretax impact of the risk management segment adjustments totals $12.2 million, with a corresponding adjustment to the provision for income taxes of $3.3 million relating to these items. For the year ended December 31, 2023, the pretax impact of the corporate segment adjustments totals $82.6 million, with a corresponding adjustment to the benefit for income taxes of $27.8 million relating to these items and other tax items noted on page 54. For the corporate segment, the clean energy related adjustments are described on page 54.

Reconciliation of Non-GAAP Measures - Pre-tax Earnings and Diluted Net Earnings per Share

(In millions except share and per share data)

Net gains on divestitures (9.6 ) (2.4 ) (7.2 ) — (7.2 ) (0.03 )

Net gains on divestitures (0.4 ) (0.1 ) (0.3 ) — (0.3 ) —

Acquisition integration 1.0 0.3 0.7 — 0.7 —

Acquisition related adjustments 0.5 0.1 0.4 — 0.4 —

Amortization of intangible assets 7.7 2.1 5.6 — 5.6 0.03

Net gains on divestitures (12.1 ) (2.6 ) (9.5 ) — (9.5 ) (0.05 )

Effective income tax rate impact — 26.0 (26.0 ) — (26.0 ) (0.13 )

Levelized foreign currency translation (19.1 ) (5.3 ) (13.8 ) — (13.8 ) (0.06 )

Net gains on divestitures (0.9 ) (0.3 ) (0.6 ) — (0.6 ) —

Acquisition related adjustments (7.8 ) (2.0 ) (5.8 ) — (5.8 ) (0.03 )

Amortization of intangible assets 6.2 1.6 4.6 — 4.6 0.02

Levelized foreign currency translation (0.6 ) 0.1 (0.7 ) — (0.7 ) —

Acquisition of My Plan Manager, Cadence Insurance, Eastern Insurance and Buck

On December 6, 2023, we acquired all of the issued and outstanding shares of My Plan Manager. See Note 3 to our 2023 consolidated financial statements for information on the purchase price consideration paid to acquire My Plan Manager. We funded the transaction using free cash flow and borrowings under our Credit Agreement (see Financing Cash Flow section below). The acquired My Plan Manager is the leading provider of plan management services to participants in Australia’s National Disability Insurance Scheme.

On November 30, 2023, we acquired all of the issued and outstanding shares of Cadence Insurance. See Note 3 to our 2023 consolidated financial statements for information on the purchase price consideration paid to acquire Cadence Insurance. We funded the transaction using free cash flow and funds received from an unsecured senior notes offering. The acquired Cadence Insurance business offers a full suite of commercial property/casualty, employee benefits and personal lines products to clients from 34 offices spanning nine states across the Southeast, including Texas.

On October 31, 2023, we acquired the net assets of Eastern Insurance. See Note 3 to our 2023 consolidated financial statements for information on the purchase price consideration paid to acquire Eastern Insurance. We funded the transaction using free cash flow and funds received from an unsecured senior notes offering. The acquired Eastern Insurance business offers comprehensive commercial property/casualty and personal lines products as well as employee benefits consulting to clients throughout the Northeastern U.S.

On April 3, 2023 we acquired the partnership interests of Buck. See Note 3 to our 2023 consolidated financial statements for information on the purchase price consideration paid to acquire Buck. We funded the transaction using free cash flow and funds received from an unsecured senior notes offering. The acquired Buck business is a leading provider of retirement, human resource and employee benefits consulting and administration services operating for more than 100 years with a diverse client base by both size and industry. Immediately prior to closing, Buck had over 2,300 employees, including more than 220 credentialed actuaries, primarily serving customers throughout the U.S., Canada and the U.K.

Insurance Market Overview

Fluctuations in premiums charged by property/casualty underwriting enterprises have a direct and potentially material impact on the insurance brokerage industry. Commission revenues are generally based on a percentage of the premiums paid by insureds and normally follow premium levels. Insurance premiums are cyclical in nature and may vary widely based on market conditions. Various factors, including competition for market share among underwriting enterprises, increased underwriting capacity and improved economies of scale following consolidations, can result in flat or reduced property/casualty premium rates (a “soft” market). A soft market tends to put downward pressure on commission revenues. Various countervailing factors, such as greater than anticipated loss experience, unexpected loss exposure and capital shortages, can result in increasing property/casualty premium rates (a “hard” market). A hard market tends to favorably impact commission revenues. Hard and soft markets may be broad-based or more narrowly focused across individual product lines or geographic areas. As markets harden, buyers of insurance (such as our brokerage clients), have historically tried to mitigate premium increases and the higher commissions these premiums generate, including by raising their deductibles and/or reducing the overall amount of insurance coverage they purchase. As the market softens, or costs decrease, these trends have historically reversed. During a hard market, buyers may switch to negotiated fee in lieu of commission arrangements to compensate us for placing their risks, or may consider the alternative insurance market, which includes self-insurance, captives, rent-a-captives, risk retention groups and capital market solutions to transfer risk. Our brokerage units are very active in these markets as well. While increased use by insureds of these alternative markets historically has reduced commission revenue to us, such trends generally have been accompanied by new sales and renewal increases in the areas of risk management, claims management, captive insurance and self-insurance services and related growth in fee revenue. Inflation tends to increase the levels of insured values and risk exposures, resulting in higher overall premiums and higher commissions. However, the impact of hard and soft market fluctuations has historically had a greater impact on changes in premium rates, and therefore on our revenues, than inflationary pressures.

We use the Council of Insurance Agents & Brokers (which we refer to as the CIAB) insurance pricing quarterly survey as an indicator of the insurance rate environment. The CIAB represents the leading domestic and international insurance brokers, who write approximately 85% of the commercial property/casualty premiums in the U.S. The fourth quarter 2023 survey had not been published as of the filing date of this report. The first three 2023 quarterly surveys indicated that U.S. commercial property/casualty rates increased by 8.8%, 8.9%, and 8.1% on average, for the first, second and third quarters of 2023, respectively. We expect a similar trend to be noted when the CIAB fourth quarter 2023 survey report is issued, which would indicate overall continued price firming and hardening in most lines of business.

We believe increases in property/casualty rates will continue throughout 2024 due to rising loss costs, a hard reinsurance market, increased frequency of catastrophe losses and social inflation. If loss trends deteriorate over the coming quarters, including due to the impact of natural catastrophes, it could lead to a more difficult rate and conditions environment in certain lines. The combination of increasing insurable values (due in large part to inflation, including wage inflation), a tight labor market and lower unemployment is likely contributing to increases in client insured exposures. Additionally, we expect that our history of strong new business generation, solid retentions and enhanced value-added services for our carrier partners should all result in further organic growth opportunities around the world. Overall, we believe that in a positive rate environment with increasing exposures, our professionals can demonstrate their expertise and high-quality, value-added capabilities by strengthening our clients’ insurance portfolios and delivering insurance and risk management solutions within our clients’ budget. Based on our experience, there is currently adequate capacity in the insurance and reinsurance market for most lines of coverage.

Clean energy investments - We have investments in limited liability companies that own or have owned 29 clean coal production plants developed by us and six clean coal production plants we purchased from a third party. All 35 plants produced refined coal using propriety technologies owned by Chem-Mod. We believe that the production and sale of refined coal at these plants prior to 2022 was qualified to receive refined coal tax credits under IRC Section 45. The plants which were placed in service prior to December 31, 2009 (which we refer to as the 2009 Era Plants) received tax credits through 2019 and the 21 plants which were placed in service prior to December 31, 2011 (which we refer to as the 2011 Era Plants) received tax credits through 2021. All twenty-one of the 2011 Era Plants were under long‐term production contracts with several utilities. Those agreements ended December 31, 2021 due to the expiration of the IRC Section 45 program.

We also own a 46.5% controlling interest in Chem-Mod, which prior to 2022 marketed The Chem‐ModTM Solution proprietary technologies principally to refined fuel plants that sell refined fuel to coal-fired power plants owned by utility companies, including those plants in which we hold interests. Chem-Mod has not generated after-tax earnings since 2021.

Business Combinations and Dispositions

See Note 3 to our 2023 consolidated financial statements for a discussion of our 2023 business combinations.

Results of Operations

Information Regarding Non-GAAP Measures and Other

In the discussion and analysis of our results of operations that follows, in addition to reporting financial results in accordance with GAAP, we provide information regarding EBITDAC, EBITDAC margin, adjusted EBITDAC, adjusted EBITDAC margin, diluted net earnings per share, as adjusted (adjusted EPS), adjusted revenue, adjusted compensation and operating expenses, adjusted compensation expense ratio, adjusted operating expense ratio and organic revenue. These measures are not in accordance with, or an alternative to, the GAAP information provided in this report. We believe that these presentations provide useful information to management, analysts and investors regarding financial and business trends relating to our results of operations and financial condition or because they provide investors with measures that our chief operating decision maker uses when reviewing the company’s performance. See further below for definitions and additional reasons each of these measures is useful to investors. Our industry peers may provide similar supplemental non-GAAP information with respect to one or more of these measures, although they may not use the same or comparable terminology and may not make identical adjustments. For example, our organic revenue is calculated differently than some of our industry peers. The non-GAAP information we provide should be used in addition to, but not as a substitute for, the GAAP information provided. We make determinations regarding certain elements of executive officer incentive compensation, performance share awards and annual cash incentive awards, partly on the basis of measures related to adjusted EBITDAC.

Adjusted Non-GAAP presentation - We believe that the adjusted non-GAAP presentation of our 2023 and 2022 information, presented on the following pages, provides stockholders and other interested persons with useful information regarding certain financial metrics that may assist such persons in analyzing our operating results as they develop a future earnings outlook for us. The after-tax amounts related to the adjustments were computed using the normalized effective tax rate for each respective period.

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Adjusted measures - We define these measures as revenues (for the brokerage segment), revenues before reimbursements (for the risk management segment), net earnings, compensation expense and operating expense, respectively, each adjusted to exclude the following, as applicable:

Net gains on divestitures, which are primarily net proceeds received related to sales of books of business and other divestiture transactions, such as the disposal of a business through sale or closure.

Acquisition integration costs, which include costs related to certain large acquisitions (including Willis Re, the acquisition of Buck and the acquisitions of Cadence Insurance, Eastern Insurance and My Plan Manager), outside the scope of our usual tuck-in strategy, not expected to occur on an ongoing basis in the future once we fully assimilate the applicable acquisition. These costs are typically associated with redundant workforce, compensation expense related to amortization of certain retention bonus arrangements, extra lease space, duplicate services and external costs incurred to assimilate the acquisition into our IT related systems.

Transaction-related costs, which primarily are associated with the acquisition of Willis Re (primarily related to deferred closings in certain jurisdictions in 2022), the acquisition of Buck and the acquisitions of Cadence Insurance, Eastern Insurance and My Plan Manager. These include costs related to regulatory filings, legal and accounting services, insurance and incentive compensation.

Workforce related charges, which primarily include severance costs (either accrued or paid) related to employee terminations and other costs associated with redundant workforce.

Lease termination related charges, which primarily include costs related to terminations of real estate leases and abandonment of leased space.

Acquisition related adjustments, which include the change in estimated acquisition earnout payables adjustments and acquisition related compensation charges.

Amortization of intangible assets which reflects the amortization of customer/expiration lists, non-compete agreements, trade names and other intangible assets acquired through our merger and acquisition strategy, the impact to amortization expense of acquisition valuation adjustments to these assets as well as non-cash impairment charges.

The impact of foreign currency translation, as applicable. The amounts excluded with respect to foreign currency translation are calculated by applying current year foreign exchange rates to the same period in the prior year.

Effective income tax rate impact, which levelizes the prior year for the change in current year tax rates.

Clean energy related, which represents the resolution of various partnership matters related to our clean energy investments.

Legal and tax related, which represents the impact of (a) adjustments in fourth quarter 2023 related to costs associated with legal and tax matters as well as the impact of tax items associated with 2022 tax returns filed in October 2023, (b) adjustments in second quarter of 2023 related to additional U.K. income tax expense related to the non‐deductibility of acquisition-related adjustments made in the quarter and costs associated with legal and tax matters, (c) adjustments in second quarter 2022 related to a one-time U.S. state tax benefit that resulted from legal entity restructuring and a favorable U.K. tax impact related to earnout liability adjustments, and (d) adjustments in first quarter 2022 related to a one-time benefit related to the revaluation of certain deferred income tax assets associated with increasing our U.S. state effective income tax rate.

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Adjusted ratios - Adjusted compensation expense and adjusted operating expense, respectively, each divided by adjusted revenues.

Non-GAAP Earnings Measures

We believe that the presentation of EBITDAC, EBITDAC margin, adjusted EBITDAC, adjusted EBITDAC margin, adjusted EPS and adjusted net earnings for the brokerage and risk management segment, each as defined below, provides a meaningful representation of our operating performance. Adjusted EPS is a performance measure and should not be used as a measure of our liquidity. We also consider EBITDAC and EBITDAC margin as ways to measure financial performance on an ongoing basis. In addition, adjusted EBITDAC, adjusted EBITDAC margin and adjusted EPS for the brokerage and risk management segments are presented to improve the comparability of our results between periods by eliminating the impact of the items that have a high degree of variability.

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EBITDACand EBITDAC Margin - EBITDAC is net earnings before interest, income taxes, depreciation, amortization and the change in estimated acquisition earnout payables and EBITDAC margin is EBITDAC divided by total revenues (for the brokerage segment) and revenues before reimbursements (for the risk management segment). These measures for the brokerage and risk management segments provide a meaningful representation of our operating performance for the overall business and provide a meaningful way to measure our financial performance on an ongoing basis.

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Adjusted EBITDACand Adjusted EBITDAC Margin - Adjusted EBITDAC is EBITDAC adjusted to exclude net gains on divestitures, acquisition integration costs, workforce related charges, lease termination related charges, acquisition related adjustments, transaction related costs, legal and tax related costs, and the period-over-period impact of foreign currency translation, as applicable and Adjusted EBITDAC margin is Adjusted EBITDAC divided by total adjusted revenues (defined above). These measures for the brokerage and risk management segments provide a meaningful representation of our operating performance, and are also presented to improve the comparability of our results between periods by eliminating the impact of the items that have a high degree of variability.

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Adjusted EPS and Adjusted Net Earnings - Adjusted net earnings have been adjusted to exclude the after-tax impact of net gains on divestitures, acquisition integration costs, the impact of foreign currency translation, workforce related charges, lease termination related charges, acquisition related adjustments, transaction related costs, amortization of intangible assets, legal and tax related costs and effective income tax rate impact, as applicable. Adjusted EPS is Adjusted Net Earnings divided by diluted weighted average shares outstanding. This measure provides a meaningful representation of our operating performance (and as such should not be used as a measure of our liquidity), and for the overall business is also presented to improve the comparability of our results between periods by eliminating the impact of the items that have a high degree of variability.

Organic Revenues (a non-GAAP measure) - For the brokerage segment, organic change in base commission and fee revenues, supplemental revenues and contingent revenues excludes the first twelve months of such revenues generated from acquisitions and such revenues related to divested operations in each year presented. These revenues are excluded from organic revenues in order to help interested persons analyze the revenue growth associated with the operations that were a part of our business in both the current and prior year. In addition, organic change in base commission and fee revenues, supplemental revenues and contingent revenues exclude the period-over-period impact of foreign currency translation to improve the comparability of our results between periods. For the risk management segment, organic change in fee revenues excludes the first twelve months of such revenues generated from acquisitions and such revenues related to divested operations in each year presented. In addition, change in organic growth in fee revenues excludes the period-over-period impact of foreign currency translation to improve the comparability of our results between periods.

These revenue items are excluded from organic revenues in order to determine a comparable, but non-GAAP, measurement of revenue growth that is associated with the revenue sources that are expected to continue in the current year and beyond as well as eliminating the impact of the items that have a high degree of variability. We have historically viewed organic revenue growth as an important indicator when assessing and evaluating the performance of our brokerage and risk management segments. We also believe that using this non-GAAP measure allows readers of our financial statements to measure, analyze and compare the growth from our brokerage and risk management segments in a meaningful and consistent manner.

Reconciliation of Non-GAAP Information Presented to GAAP Measures - This report includes tabular reconciliations to the most comparable GAAP measures, as follows: for EBITDAC (on pages 42 and 48), for adjusted revenues, adjusted EBITDAC and adjusted diluted net earnings per share (on page 35), for organic revenue measures (on pages 43 and 48), respectively, for the brokerage and risk management segments, for adjusted compensation and operating expenses and adjusted EBITDAC margin (on page 45), respectively, for the brokerage segment and (on page 49) for the risk management segment.

Brokerage

The brokerage segment accounted for 86% of our revenue in 2023. Our brokerage segment is primarily comprised of retail, wholesale and Gallagher Re. Our brokerage segment generates revenues by:

(i)

Identifying, negotiating and placing all forms of insurance or coverage, as well as providing data analytics, risk-shifting, risk-sharing and risk-mitigation consulting services, principally related to property/casualty, life, health, welfare and disability insurance. We also provide these services through, or in conjunction with, other unrelated agents and brokers, consultants and management advisors;

(ii)

Identifying, negotiating and placing all forms of reinsurance coverage, as well as providing capital markets services, including acting as underwriter, with respect to insurance linked securities, weather derivatives, capital raising and selected merger and acquisition advisory activities;

(iii)

Acting as an agent or broker for multiple underwriting enterprises by providing services such as sales, marketing, selecting, negotiating, underwriting, servicing and placing insurance coverage on their behalf;

(iv)

Providing consulting services related to health and welfare benefits, voluntary benefits, executive benefits, compensation, retirement planning, institutional investment and fiduciary, actuarial, compliance, private insurance exchange, human resource technology, communications and benefits administration; and

(v)

Providing management and administrative services to captives, pools, risk-retention groups, healthcare exchanges, small underwriting enterprises, such as accounting, claims and loss processing assistance, feasibility studies, actuarial studies, data analytics and other administrative services.

The primary source of revenues for our brokerage services is commissions from underwriting enterprises, based on a percentage of premiums paid by our clients, or fees received from clients based on an agreed level of service usually in lieu of commissions. Commissions are fixed at the contract effective date and generally are based on a percentage of premiums for insurance coverage or employee headcount for employer sponsored benefit plans. Commissions depend upon a large number of factors, including the type of risk being placed, the particular underwriting enterprise’s demand, the expected loss experience of the particular risk of coverage, and historical benchmarks surrounding the level of effort necessary for us to place and service the insurance contract. Rather than being tied to the amount of premiums, fees are most often based on an expected level of effort to provide our services. In addition, under certain circumstances, both retail brokerage and wholesale brokerage services receive supplemental and contingent revenues. Supplemental revenue is revenue paid by an underwriting enterprise that is above the base commission paid, is determined by the underwriting enterprise and is established annually in advance of the contractual period based on historical performance criteria. Contingent revenue is revenue paid by an underwriting enterprise based on the overall profit and/or volume of the business placed with that underwriting enterprise during a particular calendar year and is determined after the contractual period.

Financial information relating to our brokerage segment results for 2023 and 2022 (in millions, except per share, percentages and workforce data):

Interest income, premium finance revenues and other income 337.7 147.5 190.2

Change in estimated acquisition earnout payables 376.8 90.4 286.4

Net earnings attributable to noncontrolling interests 6.3 4.4 1.9

Net earnings attributable to controlling interests $ 1,163.1 $ 1,197.4 $ (34.3 )

Diluted net earnings per share $ 5.30 $ 5.58 $ (0.28 )

Other Information

Change in diluted net earnings per share (5 )% 15 %

Growth in revenues 18 % 22 %

Organic change in commissions and fees 9 % 9 %

Compensation expense ratio 55 % 55 %

Operating expense ratio 15 % 14 %

Effective income tax rate 26 % 25 %

Workforce at end of period (includes acquisitions) 39,337 32,679

AJG US Equity

AJG · 10-K · period ended 2023-12-31

Item 1A. Risk Factors.

Item 1B. Unresolved Staff Comments.

Item 1C. Cybersecurity.

Item 2. Properties.

Item 3. Legal Proceedings.

Item 4. Mine Safety Disclosures.

Item 5. Market for the Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities.

Item 6. [Reserved].

Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations.

AJG US Equity☆

AJG · 10-K · period ended 2023-12-31

Item 1A. Risk Factors.

Item 1B. Unresolved Staff Comments.

Item 1C. Cybersecurity.

Item 2. Properties.

Item 3. Legal Proceedings.

Item 4. Mine Safety Disclosures.

Item 5. Market for the Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities.

Item 6. [Reserved].

Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations.

AJG US Equity