Arthur J. Gallagher & Co. 10-K 2024-12-31

UNITED STATES

SECURITIES AND EXC****HANGE COMMISSION

Washington, D.C. 20549

FORM 10-K

For the fiscal year ended December 31, 2024

For the transition period from to

Commission file number 1-09761

ARTHUR J. GALLAGHER & CO.

(Exact name of registrant as specified in its charter)

Registrant’s telephone number, including area code (630) 773-3800

Securities registered pursuant to Section 12(b) of the Act:

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes ☒ No ☐.

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. Yes ☐ No ☒.

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☒ No ☐.

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ☒ No ☐.

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or emerging growth company. See definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b‑2 of the Exchange Act.

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 726(b)) by the registered public accounting firm that prepared or issued its audit report Yes ☒ No ☐.

If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in the filing reflect the correction of an error to previously issued financial statements. ☐

Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation received by any of the registrant’s executive officers during the relevant recovery period pursuant to §240.10D-1(b). ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐ No ☒.

The aggregate market value of the voting common equity held by non-affiliates of the registrant, computed by reference to the last reported price at which the registrant’s common equity was sold on June 30, 2024 (the last day of the registrant’s most recently completed second quarter) was $49,339.2 million.

The number of outstanding shares of the registrant’s Common Stock, $1.00 par value, as of January 31, 2025 was 254.7 million**.**

Documents incorporated by reference: Portions of Arthur J. Gallagher & Co.’s definitive 2025 Proxy Statement are incorporated by reference into this Form 10‑K in response to Part III to the extent described herein.

Information Concerning Forward-Looking Statements

This report contains certain statements related to future results, or states our intentions, beliefs and expectations or predictions for the future of Arthur J. Gallagher & Co. and its subsidiaries, collectively referred to herein as we, our, us, Gallagher or the Company, which are forward-looking statements as that term is defined in the Private Securities Litigation Reform Act of 1995. Forward‑looking statements relate to expectations or forecasts of future events. Such statements use words such as “anticipate,” “believe,” “estimate,” “expect,” “contemplate,” “forecast,” “project,” “intend,” “plan,” “potential,” and other similar terms, and future or conditional tense verbs like “could,” “may,” “might,” “see,” “should,” “will” and “would.” You can also identify forward-looking statements by the fact that they do not relate strictly to historical or current facts. For example, we may use forward-looking statements when addressing topics such as: the impact of general economic conditions, including inflation, interest rates and market uncertainty; the effects of geopolitical volatility, including repercussions from the armed conflicts in Ukraine and the Middle East; market and industry conditions, including competitive and pricing trends and the impact of large natural events; acquisition strategy including the expected size of our acquisition program; the expected impact of acquisitions and dispositions and integrating recent acquisitions, including comments regarding the expected benefits of our acquisition of BCHR Holdings, L.P., and its subsidiaries, dba Buck (which we refer to as Buck), Cadence Insurance, Inc. (which we refer to as Cadence Insurance), Eastern Insurance Group, LLC (which we refer to as Eastern Insurance), My Plan Manager Group Pty Ltd (which we refer to as My Plan Manager), and the acquisition of all the issued and outstanding stock of Dolphin TopCo, Inc., the holding company of AssuredPartners, Inc. (which we refer to as AssuredPartners, and such acquisition, which we refer to as the Transaction), and other acquisitions larger than our typical tuck-in acquisitions and the expected duration and costs of integrating such large acquisitions; the development and performance of our services and products; changes in the composition or level of our revenues or earnings; our cost structure and the size and outcome of cost-saving or restructuring initiatives; future capital expenditures; future debt levels and anticipated actions to be taken in connection with maturing debt; future debt to earnings ratios; the outcome of contingencies; dividend policy; pension obligations; cash flow and liquidity; capital structure and financial losses; future actions by regulators; the outcome of existing regulatory actions, audits, reviews or litigation; the impact of changes in accounting rules; financial markets; interest rates; foreign exchange rates; matters relating to our operations; income taxes; expectations regarding our investments; human capital management, including diversity and inclusion initiatives, and sustainability, including climate-resilience and climate-advisory products and services and our carbon emissions. These forward-looking statements are subject to certain risks and uncertainties that could cause actual results to differ materially from either historical or anticipated results depending on a variety of factors.

Potential factors from the acquisition of AssuredPartners that could impact results include impact results include:

Our ability to complete the Transaction on a timely basis or at all, which may be negatively impacted by issues with regulatory approvals in the United States (U.S.), the United Kingdom (U.K.) and Ireland;

The Transaction will not be accretive to earnings per share because our assumptions about our business, AssuredPartners and preliminary estimates are materially inaccurate causing dilution to our earnings per share; decreasing or delaying the expected accretive effect of the Transaction or causing a decrease in the market price of our common stock;

Risks related to the integration of AssuredPartners into the Company, including achieving the expected cost savings or revenue synergies from such integration, that AssuredPartners will perform as expected or that we will incur unforeseen obligations or liabilities; and

Diversion of management’s attention from ongoing business operations and opportunities.

Potential factors that could impact results include:

Global economic and geopolitical events, such as fluctuations in interest and inflation rates; geo-economic fragmentation and protectionism such as tariffs, trade wars or similar governmental actions affecting the flows of goods, services or currency; a recession or economic downturn; a potential U.S. government shutdown or gridlock over increasing the U.S. debt ceiling; political violence, and instability, including as a result of the armed conflicts in Ukraine and the Middle East;

Economic conditions that result in financial difficulties for underwriting enterprises or lead to reduced risk-taking capital capacity, for example, as a result of large payouts related to extreme weather events, or to the failure of such enterprises, including the increased risk of errors and omissions (which we refer to as E&O) claims against us;

Risks that could negatively affect the success of our acquisition strategy, including the impact of economic uncertainty on our ability to source, review and price acquisitions, continuing consolidation in our industry and interest in acquiring insurance brokers on the part of private equity firms and newly public insurance brokers, which makes it more difficult to identify targets and in some cases makes them more expensive, inaccurate assumptions and failure to realize expected benefits; the risk that we may not receive timely regulatory approval of pending transactions, closing risks; execution risks, integration risks, poor cultural fit, the risk of post-acquisition deterioration leading to intangible asset impairment

charges, and the risk we could incur or assume unanticipated liabilities such as cybersecurity issues or violations of anti‑corruption and sanctions laws;

Risks related to Buck, Cadence Insurance, Eastern Insurance, My Plan Manager, the pending acquisition of AssuredPartners and other acquisitions larger than our usual tuck-in acquisitions, including risks related to our ability to successfully integrate operations, the possibility that our assumptions may be inaccurate resulting in unforeseen obligations or liabilities and failure to realize the expected benefits of these acquisitions;

Damage to our reputation, including as a result of failing to uphold our culture and the potential for the Internet and social media to magnify the effects of such reputational issues;

Failure to meet our sustainability aspirations, goals and initiatives or to comply with increasingly complex climate-related and other sustainability regulations, including heightened scrutiny, including a growing backlash against sustainability initiatives, and increased risks related to “greenwashing” and “greenhushing;”

Failure to apply technology, data analytics and artificial intelligence (which we refer to as AI) effectively in driving value for our clients through technology-based solutions, or failure to gain internal efficiencies and effective internal controls through the application of technology and related tools;

Risks associated with the use of AI in our business operations, including regulatory, data privacy, cybersecurity, E&O, intellectual property and competition risks;

Failure to attract and retain experienced and qualified talent, including our senior management team, or adequately plan and execute for the succession of such leaders; increased costs resulting from increased compensation and benefits packages as a result of a tighter labor market, and negative effects from restrictions on non-compete agreements at the state level;

A disaster or other significant disruption to business continuity for our own operations or those of third-parties on which we rely, including cybersecurity incidents; natural disasters; political violence and unrest in the U.S. or elsewhere around the world; for example, our substantial operations in India could be negatively impacted as a result of the dispute between India and Pakistan involving the Kashmir region, rising tensions between India and China, or incidents of terrorism in India, civil unrest or other reasons;

Sustained increases in the cost of employee benefits and compensation expense;

Risks arising from our international operations and changes in international conditions, including the risks posed by political and economic uncertainty in certain countries (including repercussions from the armed conflicts in Ukraine and the Middle East), maintaining regulatory and legal compliance across multiple jurisdictions (such as those relating to violations of anti‑corruption, sanctions, and privacy laws, increasingly complex regulatory requirements related to climate change and sustainability issues); increased protectionism, tariffs, and trade wars, climate change and other long-term sustainability matters, increased scrutiny of the use of off-shore centers of excellence such as those we operate and global health risks;

Risks related to changes in U.S. or foreign tax laws, including a U.S. or foreign tax rate change, potential changes in guidance related to the U.S. Inflation Reduction Act, the Organisation for Economic Co-operation and Development’s (OECD) global minimum corporate tax regime, and other local policy changes;

Competitive pressures, including as a result of innovation, in each of our businesses;

Volatility or declines in premiums or other adverse trends in the insurance industry;

The higher level of variability inherent in contingent and supplemental revenues versus standard commission revenues;

Risks particular to our benefit consulting operations, including risks related to the acquisition of Buck and Redington Ltd. (which we refer to as Redington), an FCA-regulated investment consulting firm;

Risks particular to our third-party claims administrations operations, including risks related to the availability of RISX‑FACS®, our proprietary risk management information system, wage inflation, staffing shortages, any slowing of the trend toward outsourcing claims administration, and the concentration of large amounts of revenue with certain clients;

Climate risks, including the risk of a systemic economic crisis and disruptions to our business caused by the transition to a low-carbon economy;

Cyber-attacks or other cybersecurity incidents and the heightened risk of such attacks as a result of the armed conflicts in Ukraine and the Middle East, improper disclosure of confidential, personal or proprietary data and changes to laws and regulations governing cybersecurity and data privacy;

Unfavorable determinations related to contingencies and legal proceedings, including; violations or alleged violations of the U.S. Foreign Corrupt Practices Act (which we refer to as FCPA), the U.K. Bribery Act 2010 or other anti-corruption laws and the Foreign Account Tax Compliance provisions of the Hiring Incentives to Restore Employment Act, and the outcome of any existing or future investigation, review, regulatory action or litigation;

Failure to comply with regulatory requirements, including those related to governance and control requirements in particular jurisdictions, international sanctions, including new sanctions laws as a result of the armed conflicts in Ukraine and the Middle East; laws relating to the disclosure of sustainability matters; laws relating to the use of AI, or a change in regulations or enforcement policies that adversely affects our operations (for example, relating to insurance broker compensation methods or restrictions on non-compete agreements);

Changes to our financial presentation from new accounting estimates and assumptions;

Intellectual property risks;

Risks related to our legacy clean energy investments, including intellectual property claims, environmental and product liability claims, environmental compliance costs and the risk of disallowance by the Internal Revenue Service of previously claimed tax credits;

The risk that our outstanding debt adversely affects our financial flexibility and restrictions and limitations in the agreements and instruments governing our debt;

The risk of credit rating downgrades;

The risk that we may not be able to receive dividends or other distributions from our subsidiaries, including the effects of significant changes in foreign exchange rates;

The risk of share ownership dilution when we issue common stock; and

Volatility of the price of our common stock.

Forward-looking statements are not guarantees of future performance. They involve risks, uncertainties and assumptions, including the risk factors referred to above. Our future performance and actual results or outcomes may differ materially from those expressed in forward-looking statements. Accordingly, you should not place undue reliance on forward-looking statements, which speak only as of, and are based on information available to us on, the date of the applicable document. Many of the factors that will determine these results are beyond our ability to control or predict. All subsequent written and oral forward-looking statements attributable to us or any person acting on our behalf are expressly qualified in their entirety by the cautionary statements contained or referred to in this section. Forward-looking statements speak only as of the date that they are made, and we do not undertake any obligation to update any such statements or release publicly any revisions to these forward-looking statements to reflect events or circumstances after the date of this report or to reflect new information, future or unexpected events or otherwise, except as required by applicable law or regulation. In addition, historical, current and forward-looking sustainability-related statements may be based on standards for measuring progress that are still developing, internal controls and processes that continue to evolve, and assumptions that are subject to change in the future.

A detailed discussion of the factors that could cause actual results to differ materially from our published expectations is contained under the heading “Risk Factors” in our filings with the Securities and Exchange Commission (SEC), including this report and any other reports we file with the SEC in the future.

Arthur J. Gallagher & Co.

Annual Report on Form 10-K

For the Fiscal Year Ended December 31, 2024

Index

Part I

Overview

Arthur J. Gallagher & Co. and its subsidiaries, collectively referred to herein as we, our, us or Gallagher, are engaged in providing insurance brokerage, reinsurance brokerage, consulting, and third-party property/casualty claims settlement and administration services to entities and individuals around the world. We believe that our major strength is our ability to deliver comprehensively structured insurance, reinsurance and risk management solutions, superior claim outcomes and comprehensive consulting services to our clients.

Our brokerage segment operations provide brokerage and consulting services to entities of all types, including commercial, nonprofit, public sector entities, insurance companies and insurance capital providers, and to a lesser extent, individuals, in the areas of insurance and reinsurance placements, risk of loss management, and management of employer sponsored benefit programs. Our risk management segment operations provide contract claim settlement, claim administration, loss control services and risk management consulting for commercial, nonprofit, captive and public sector entities, and various other organizations that choose to self-insure property/casualty coverages or choose to use a third-party claims management organization rather than the claim services provided by an underwriting enterprise.

We do not assume underwriting risk on a net basis, other than with respect to de minimis amounts necessary to provide minimum or regulatory capital to organize captives, pools, specialized underwriters or risk-retention groups. Rather, capital necessary for covering events of loss is provided by “underwriting enterprises,” which we define as insurance companies, reinsurance companies and various other risk-taking entities, including intermediaries of underwriting enterprises, that we do not own or control.

Since our founding in 1927, we have grown from a one-person insurance agency to the world’s third largest insurance broker/risk manager based on revenues according to Business Insurance magazine’s July/August 2024 edition, and one of the world’s largest property/casualty third party claims administrators, according to Business Insurance magazine’s May 2024 edition.

We report our results in three segments: brokerage, risk management and corporate. The brokerage and risk management segments contributed approximately 86% and 14%, respectively, to 2024 revenues. We generate approximately 64% of our revenues from the combined brokerage and risk management segments in the U.S., with the remaining 36% generated internationally, primarily in Australia, Canada, New Zealand and the U.K. The corporate segment did not generate any significant revenues in 2024.

Shares of our common stock are traded on the New York Stock Exchange under the symbol “AJG”, and we had a market capitalization at December 31, 2024 of approximately $71 billion. Information in this report is as of December 31, 2024 unless otherwise noted. We were reincorporated as a Delaware corporation in 1972. Our executive offices are located at 2850 Golf Road, Rolling Meadows, Illinois 60008-4050, and our telephone number is (630) 773‑3800.

Operating Segments

We report our results in three segments: brokerage, risk management and corporate. The major sources of our operating revenues are commissions, fees, supplemental and contingent revenues and interest income, premium finance and other income from our brokerage operation, and fees, including performance‑based fees, from our risk management operations. The corporate segment does not generate any significant revenues.

Our business, particularly our brokerage business, is subject to seasonal fluctuations. Commissions, fees, supplemental revenues and contingent revenues, and our costs to obtain and fulfill the service obligations to our clients, can vary from quarter to quarter as a result of the timing of contract-effective dates. On the other hand, salaries and employee benefits, rent, depreciation and amortization expenses generally tend to be more uniform throughout the year. The timing of acquisitions, recognition of books of business gains and losses also impact the trends in our quarterly operating results.

Brokerage Segment

The brokerage segment accounted for 86% of our revenues in 2024. Our brokerage segment operates through a network of more than 580 sales and service offices located throughout the U.S. and approximately 350 sales and service offices in approximately

60 countries, most of which are in the Australia, Canada, New Zealand and the U.K. Most of these offices are fully staffed with sales and service personnel. We offer client service capabilities in approximately 130 countries around the world through our direct operations as well as through a network of correspondent brokers and consultants.

Domestic Retail Insurance Brokerage Operations

Our retail insurance brokerage operations accounted for 73% of our brokerage segment revenues in 2024. Our retail brokerage operations place nearly all lines of commercial property/casualty and health and welfare insurance coverage. Significant lines of insurance coverage and consultant capabilities are as follows:

Our retail brokerage operations are organized and operate within certain key niche/practice groups, which account for approximately 79% of our retail brokerage revenues. These specialized teams target areas of business and/or industries in which we have developed a depth of expertise and a large client base. Significant niche/practice groups we serve are as follows:

Our specialized focus on these niche/practice groups allows for highly-focused marketing efforts and facilitates the development of value-added products and services specific to those industries. We believe that our detailed understanding and broad client contacts within these niche/practice groups provide us with a competitive advantage.

We anticipate that our retail brokerage operations’ greatest revenue growth over the next several years will continue to come from:

Our niche/practice groups and middle-market accounts;

Cross-selling other brokerage products to existing clients;

Mergers and acquisitions; and

Developing and managing alternative market mechanisms such as captives, rent-a-captives and deductible plans/self‑insurance.

International and Other Brokerage Related Operations

We operate as a retail commercial property and casualty broker throughout 45 locations in Australia, 42 locations in Canada and 37 locations in New Zealand. In the U.K., we operate as a retail broker from approximately 100 locations. We also have specialty, wholesale, underwriting and reinsurance intermediary operations in London for clients to access Lloyd’s of London and other international underwriting enterprises, and a program operation offering customized risk management products and services to U.K. public entities. See the discussion below regarding our “Global Reinsurance Brokerage Operations.”

In Bermuda, we act principally as a wholesale broker for clients looking to access Bermuda-based underwriting enterprises and we also provide management and administrative services for captive insurance entities.

We also have strategic brokerage alliances with a variety of independent brokers in countries where we do not have a local office presence. Between our direct operations and this global network of correspondent insurance brokers and consultants, we are able to serve our clients’ coverage and service needs in approximately 130 countries around the world.

Global Reinsurance Brokerage Operations

Our reinsurance brokerage operations (which we refer to as Gallagher Re) accounted for 13% of our brokerage segment revenues in 2024. Gallagher Re operates from more than 60 offices across 26 countries, with specialist expertise, underpinned by a portfolio of analytics capabilities including catastrophe modeling, dynamic financial analysis, rating agency analysis and capital modeling. Our reinsurance brokers assist underwriting enterprises, such as insurance companies and managing general underwriters, to secure protection or reinsurance from another insurance company for a specific risk or class of risks, including negotiating rates and terms and while sourcing the best-suited contracts available on the market. Additionally, through Gallagher Securities, Gallagher Re provides capital markets services, including acting as underwriter, with respect to insurance‑linked securities, weather derivatives, capital raising and selected merger and acquisition advisory activities. We anticipate growing Gallagher Re by increasing the number of underwriting enterprise clients, deepening our relationships with current underwriting enterprise clients, developing new products, further building out our facultative capabilities, and through mergers and acquisitions.

Wholesale Insurance Brokerage Operations

Our wholesale insurance brokerage operations accounted for 14% of our brokerage segment revenues in 2024. Our wholesale brokers assist our retail brokers and other non-affiliated brokers in the placement of specialized and hard-to-place insurance. These brokers operate through approximately 162 offices primarily located across the U.S., Bermuda and through our approved Lloyd’s of London brokerage operation. More than 75% of our wholesale brokerage revenues comes from non-affiliated brokerage clients.

In certain cases we act as a brokerage wholesaler, and in other cases we act as a managing general agent or managing general underwriter, distributing specialized insurance coverages for underwriting enterprises. Managing general agents and managing general underwriters are agents authorized by an underwriting enterprise to manage all or a part of its business in a specific geographic territory. Activities they perform on behalf of the underwriting enterprise may include marketing, underwriting (although we do not assume any underwriting risk), issuing policies, collecting premiums, appointing and supervising other agents, paying claims and negotiating reinsurance.

We believe our growth prospects for our wholesale brokerage operations depend on increasing the number of broker-clients, developing new managing general agency and underwriter programs, and through mergers and acquisitions.

Captive Underwriting Enterprises

We have ownership interests in several underwriting enterprises based in the U.S., Bermuda, Gibraltar, Guernsey and Isle of Man that primarily operate segregated account “rent-a-captive” facilities. These “rent-a-captive” facilities enable our clients to receive the benefits of participating in a captive underwriting enterprise without incurring certain disadvantages of ownership. In Malta and Ireland, we act as managers of underwriting enterprises.

We also have a wholly owned underwriting enterprise subsidiary based in the U.S. that cedes all of its insurance risk of loss to reinsurers or captives under facultative and quota-share treaty reinsurance agreements.

Risk Management Segment

Our risk management segment accounted for 14% of our revenues in 2024. Approximately 61% of our risk management segment’s revenues are from workers’ compensation-related claims, 34% are from general and commercial auto liability-related claims and 5% are from property-related claims in 2024.

Risk management services are primarily marketed on an independent basis from our brokerage operations, to Fortune 1000 companies, larger middle-market companies, nonprofit organizations, public sector entities, and underwriting enterprises, such as insurance carriers and captives. We manage our third party claims adjusting operations through a network of more than 40 offices located throughout Australia, Canada, New Zealand, the U.K. and the U.S. Most of these offices are fully staffed with claims adjusters and other service personnel. Our adjusters and service personnel act solely on behalf and under the instruction of our clients.

While this segment complements our brokerage offerings, approximately 94% of our risk management segment’s revenues come from clients not affiliated with our brokerage operations, such as underwriting enterprises and clients of other insurance brokers.

We expect that the risk management segment’s most significant growth prospects through the next several years will come from:

Program business and the outsourcing of portions of underwriting enterprise claims departments;

Increased levels of business with Fortune 1000 companies;

Larger middle-market companies and captives; and

Mergers and acquisitions.

Corporate Segment

The corporate segment reports the financial information related to our debt, external acquisition-related expenses, other corporate costs and the impact of foreign currency remeasurement. As a result, the timing of acquisitions impact the trends in our quarterly operating results.

Competition

Brokerage Segment

The insurance and reinsurance brokerage and consulting businesses are highly competitive and there are many organizations and individuals throughout the world who actively compete with us in every area of our business. Additionally, we also face competition from insurance and reinsurance carriers that market, distribute and service a portion of their products directly, and in some cases from banks, consulting and accounting firms, and technology companies that can provide alternative risk management products or services.

We believe that the primary factors determining our competitive advantage are the quality of the services we render, the personalized attention we provide, the individual and corporate expertise providing the actual service to the client, the data analytics and technology capabilities we have built and the overall cost efficiencies we create for our clients. We provide sophisticated data analysis and other data and benchmarking insights through a product offering we refer to as Gallagher Drive to help our clients make insurance decisions. Through our SmartMarket platform, we also provide insurance carriers with individualized preference setting and risk identification capabilities, as well as performance data and metrics. We believe these capabilities provide a growing competitive advantage with respect to many of the smaller organizations with which we compete.

Risk Management Segment

Our risk management business competes with a number of companies varying in size and scope, including global independent third party claims administrators, regional third party claims administrators, insurance owned claims administrators and legal firms in certain jurisdictions. We believe that the primary factors determining our competitive position are our ability to deliver better outcomes, reputation for outstanding service, cost-efficient service, our data analytics capabilities and financial strength.

Business Combinations

We completed approximately 750 acquisitions from January 1, 2002 through December 31, 2024. The majority of these acquisitions have been smaller regional or local brokerages, agencies, or employee benefit consulting operations with a middle or small client focus and/or significant expertise in one of our niche/practice groups. The total purchase price for individual acquisitions has typically ranged from $1.0 million to $100.0 million. During 2024, we also completed several acquisitions that were larger than our usual tuck-in acquisitions, namely the acquisitions of RIBV Holdings, LLC and Redington, within our brokerage segment.

Through these acquisitions, we seek to expand our talent pool, enhance our geographic presence and service capabilities, or further diversify our business mix. We also focus on identifying:

A corporate culture that matches our sales-oriented and ethics-based culture;

A profitable, growing business whose ability to compete would be enhanced by gaining access to our greater resources; and

Clearly defined financial criteria.

See Note 3 to our 2024 consolidated financial statements for a summary of our 2024 acquisitions, the amount and form of the consideration paid and the dates of acquisitions.

Clients

Our client base is highly diversified and includes commercial, industrial, public sector, religious and nonprofit entities, as well as underwriting enterprises in our reinsurance operations and risk management segment. In 2024, our largest single client represented approximately 1% and our ten largest clients together represented approximately 3%, respectively, of our combined brokerage and risk management segment revenues.

Human Capital

As of December 31, 2024, we had approximately 56,000 employees, with approximately 43% in the U.S. and 57% outside of the U.S. Approximately 75% of our employees work in our brokerage segment and 18% in our risk management segment. Our remaining employees work in our corporate segment, primarily at our headquarters and at Gallagher Centers of Excellence in India. In 2024, our total compensation expense was $5,501.4 million for the brokerage segment and $882.4 million for the risk management segment, representing 55% and 61%, respectively, of brokerage and risk management segment revenues. Additional information regarding compensation expense, both on a reported and an adjusted basis can be found elsewhere in this report under Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations.

Talent Development and Retention

While many of our new employees come to us through mergers and acquisitions and traditional hiring, “growing our own” has long been a key part of our human capital strategy. The Gallagher North American Sales Internship Program has been a key part of our talent development strategy for nearly 60 years. During that time, our program has grown globally and we employed approximately 500 interns in the summer of 2024. We provide our interns with professional development and on‑the‑job sales training that gives them the opportunity to cultivate expertise and accelerate their full-time sales career growth.

We invest in our employees and aim to offer competitive compensation and benefits packages. We acknowledge the changing work landscape and promote hybrid work arrangements, aiming to provide our employees with flexibility and work-life balance. Further, we conduct periodic global engagement surveys that have had increasingly strong participation and positive results.

Employee Learning and Development

We have programs around the world that offer learning and development opportunities to our employees. For example, the Achieve and Gallagher Career Associate Programs are career development programs available in North America that combine formal training, with experiential learning to provide participants the knowledge needed to be successful as client service and sales professionals, respectively. Similarly, we offer development programs outside the U.S., for example in Australia, Canada, India, New Zealand and the U.K. In addition, we provide on‑demand access to over 35,000 globally accessible business skills training modules across 18 languages.

Inclusion and Diversity

We aim to foster an environment that values and leverages the diverse talents, perspectives and ideas of all employees so they can reach their fullest potential. As of December 31, 2024, approximately 58% of our employees were women, including 48% of managers and 40% of producers. In the U.S., approximately 27% of our employees were racially/ethnically diverse, including 18% of managers and 21% of producers.

Regulation

Many of our activities throughout the world, 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 U.S. Department of Justice (DOJ), the IRS, the Federal Trade Commission (FTC) the Financial Industry Regulatory Authority (FINRA) and the Financial Crimes Enforcement Network 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, among others, licensing, cybersecurity, 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. As we continue to implement new technology and AI initiatives across our business we also expect to be subject to additional regulations related to the use of such new technologies.

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 European Union (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.

In addition, as regulators and investors continue to 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, particularly with respect to our larger-than usual acquisitions that may have their own sustainability programs and may have complied with sustainability regulations in the past in a way that may differ substantially from our sustainability program and strategy. For example, in 2023, pursuant to the Corporate Sustainability Reporting Directive (CSRD, which we expect will result in disclosure obligations in future years for us and some of our EU subsidiaries, the first set of EU sustainability reporting standards (which we refer to as ESRS) was 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 in other jurisdictions such as the International Sustainability Standards Board standards (which we refer to as ISSB) and the Task Force on Climate-Related Financial Disclosures (which we refer to as TCFD) framework. In the U.K., our business is subject to a number of disclosure obligations under different sustainability frameworks, such as the TCFD. Australia enacted mandatory disclosures based on the ISSB standards in 2024, and other jurisdictions, such as Canada and New Zealand, have announced that they plan to implement ISSB-based disclosures. There is further uncertainty in this space as the SEC’s new climate change disclosure requirements enacted in 2024 are currently being challenged in legal proceedings and are expected to be struck down, while, the State of California has enacted disclosure rules, which we expect will require us, among other things, to publish our consolidated carbon emissions. Compliance with such differing and uncertain rules and frameworks requires, significant effort and could divert management’s attention and resources.

Regulations promulgated by the U.S. Treasury Department pursuant to the Foreign Account Tax Compliance Act (which we refer to as FATCA) require us to take various measures relating to non‑U.S. funds, transactions and accounts.

Available Information

Our executive offices are located at 2850 Golf Road, Rolling Meadows, Illinois 60008-4050, and our telephone number is (630) 773‑3800. Our annual reports on Form 10-K, quarterly reports on Form 10‑Q, current reports on Form 8‑K, and amendments to those reports filed or furnished pursuant to Section 13(a) or 15(d) of the Exchange Act, are available free of charge on our website at http://investor.ajg.com/sec-filings as soon as reasonably practicable after electronically filing or furnishing such material to the SEC. The SEC also maintains a website (www.sec.gov) that includes our reports, proxy statements and other information. Unless expressly noted, the information on our website, including our investor relations website, or any other website is not incorporated by reference in this Form 10-K and should not be considered part of this Form 10-K or any other filing we make with the SEC.

Risk Factor Summary

Risks Relating to the Acquisition of AssuredPartners

There can be no assurance that the Transaction will be completed or that we will realize the expected benefits of the Transaction.

We may encounter integration challenges and AssuredPartners may not perform as expected.

We have made certain assumptions relating to the Transaction and AssuredPartners which may prove to be materially inaccurate.

Risks Relating to our Business Generally

Global economic and geopolitical events, such as fluctuations in interest and inflation rates; geo-economic fragmentation and protectionism; a recession or economic downturn; a potential U.S. government shutdown or gridlock over increasing the debt ceiling and political violence, and instability, including as a result of armed conflicts in Ukraine and the Middle East, could adversely affect our results of operations and financial condition.

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.

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.

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.

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

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

If we are unable to apply technology, data analytics and AI 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, organic and inorganic growth and compliance programs could be adversely affected.

We are subject to risks associated with AI.

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

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

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

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

Changes in tax laws could adversely affect us.

We face significant competitive pressures in each of our businesses.

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

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.

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

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.

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

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.

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

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 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.

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.

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

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.

Risks Relating to our Investments, Debt and Common Stock

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

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.

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.

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

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

Risks Relating to the Acquisition of AssuredPartners

There can be no assurance that the Transaction will be completed or that we will realize the expected benefits of the Transaction.

As discussed elsewhere in this Annual Report on Form 10-K, on December 7, 2024, we signed a definitive agreement to acquire AssuredPartners. Our ability to complete the Transaction may be negatively impacted by general market conditions, issues with regulatory approval in the U.S., the U.K. and Ireland and the other risks described herein. Although we currently anticipate that the Transaction, should it occur, will be accretive to earnings per share from and after its closing, this expectation is based on assumptions about our business, the operations to be acquired and preliminary estimates, which may change materially. As a result, should the Transaction occur, certain other amounts to be paid in connection with the Transaction may cause dilution to our earnings per share or decrease or delay the expected accretive effect of the Transaction and cause a decrease in the market

price of our common stock. In addition, a change in one or more of these assumptions may result in a change in future earnings, which could be material.

We may encounter integration challenges and AssuredPartners may not perform as expected.

We can provide no assurance that we will be able to successfully integrate AssuredPartners or achieve the expected cost savings or revenue synergies from s

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Not applicable.

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 Standards 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 supported by our Security Operations Center (which we refer to as SOC) team, a managed security service provider (MSSP) and our global Cybersecurity Incident Response Team (which we refer to as CSIRT), which provides threat detection and incident response.

We maintain a global cybersecurity incident response plan and related playbooks, for execution by the SOC team and CSIRT, in coordination with internal and external stakeholders, as applicable. Significant incidents are escalated to a cross-departmental team to assess materiality based on qualitative and quantitative factors. This team consists of executives representing core business functions, including, among others, information technology, legal, finance, accounting, data protection and business divisions, in consultation with third-party advisors, as applicable. We undertake periodic leadership tabletop exercises and periodic adversarial (“red team”) exercises simulating incident response under common risk scenarios. As an acquisitive organization, we have also established a program to increase our visibility into the cybersecurity environment of acquisition targets prior to closing.

We 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 that otherwise implicates the third-party technology and systems we use. We also require cybersecurity insurance coverage for vendors whose services or products may present a cybersecurity risk.

We 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 employees complete training on data security and our policies when they join us and annually thereafter. We review the content of our mandatory training annually, and provide access to a comprehensive set of supplemental training.

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, General Counsel 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 its 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 quarterly 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. Before then, he served as Technology Vice President & Chief Information Security Officer for GE Healthcare. He 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.

We, including our third-party vendors, have experienced cybersecurity incidents and threats and may continue to experience them in the future. Based on the information available as of the date of this Annual Report on Form 10-K, we believe that during the last three fiscal years risks from cybersecurity threats, including as a result of previous cybersecurity incidents, have not materially affected us, including our business strategy, results of operations or financial condition, and as of the date of this

Annual Report on Form 10-K, the Company is not aware of any material risks from cybersecurity threats that are reasonably likely to do so. However, we cannot eliminate all risks from cybersecurity threats or provide assurances that the Company will not be materially affected by such risks in the future. 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. There can be no guarantee that our policies, programs and controls, and those of our third-party vendors, including those described in this section, will be sufficient to protect our information, information systems or other property. 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.

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 13 and 15 to our 2024 consolidated financial statements for information with respect to our lease commitments as of December 31, 2024.

Please see the information set forth in Note 15 to our consolidated financial statements, included herein, under “Litigation, Regulatory and Taxation Matters.”

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:

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

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

As of January 31, 2025, there were approximately 2,000 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, 2024:

(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 10 to our 2024 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 2024, 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 2024 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 match amounts by the Company, 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.

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 40 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 and third-party property/casualty claims settlement and administration services through a network of offices located throughout Australia, Canada, New Zealand, the U.K. and the U.S. In 2024, 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 Australia, Canada, New Zealand and the U.K. (based on 2024 revenues). We have three reportable segments: brokerage, risk management and corporate. Brokerage and risk management contributed approximately 86% and 14%, respectively, to 2024 revenues. Our major sources of operating revenues are commissions, fees and supplemental and contingent revenues from brokerage operations and fees from risk management operations. Interest income, premium finance revenues and other income is generated from invested cash and fiduciary funds and revenue from premium financing.

Prior Year Discussion of Results and Comparisons

For information on fiscal 2023 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, 2023.

Summary of Financial Results - Year Ended December 31,

See the reconciliations of non-GAAP measures on page 38.

In our corporate segment, net after-tax (loss) earnings from our clean energy investments was $(4.4) million and $(11.5) million in 2024 and 2023, respectively. At this time, we anticipate our clean energy investments will produce after-tax losses in 2025.

The following provides information that management believes is helpful when comparing revenues before reimbursements, net earnings, EBITDAC and diluted net earnings per share for 2024 and 2023. 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 44 and 50 of this filing.

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We are exposed to various market risks in our day to day operations. Market risk is the potential loss arising from adverse changes in market rates and prices, such as interest and foreign currency exchange rates and equity prices. The following analyses present the hypothetical loss in fair value of the financial instruments held by us at December 31, 2024 that are sensitive to changes in interest rates. The range of changes in interest rates used in the analyses reflects our view of changes that are reasonably possible over a one‑year period. This discussion of market risks related to our consolidated balance sheet includes estimates of future economic environments caused by changes in market risks. The effect of actual changes in these market risk factors may differ materially from our estimates. In the ordinary course of business, we also face risks that are either nonfinancial or unquantifiable, including credit risk and legal risk. These risks are not included in the following analyses.

Our invested assets are primarily held as cash and cash equivalents, which are subject to various market risk exposures such as interest rate risk. The fair value of our portfolio of cash and cash equivalents as of December 31, 2024 approximated its carrying value due to its short-term duration. We estimated market risk as the potential decrease in fair value resulting from a hypothetical one-percentage point increase in interest rates for the instruments contained in the cash and cash equivalents investment portfolio. The resulting fair values were not materially different from their carrying values at December 31, 2024.

As of December 31, 2024, we had $13,073.0 million of borrowings outstanding under our various senior notes and note purchase agreements. The aggregate estimated fair value of these borrowings at December 31, 2024 was $12,072.7 million due to the long-term duration and fixed interest rates associated with these debt obligations. No active or observable market exists for our private placement long‑term debt. Therefore, the estimated fair value of this debt is based on the income valuation approach, which is a valuation technique that converts future amounts (for example, cash flows or income and expenses) to a single current (that is, discounted) amount. The fair value measurement is determined on the basis of the value indicated by current market expectations about those future amounts. Because our debt issuances generate a measurable income stream for each lender, the income approach was deemed to be an appropriate methodology for valuing the private placement long-term debt. The methodology used calculated the original deal spread at the time of each debt issuance, which was equal to the difference between the yield of each issuance (the coupon rate) and the equivalent benchmark treasury yield at that time. The market spread as of the valuation date was calculated, which is equal to the difference between an index for investment grade insurers and the equivalent benchmark treasury yield today. An implied premium or discount to the par value of each debt issuance based on the difference between the origination deal spread and market as of the valuation date was then calculated. The index we relied on to represent investment graded insurers was the Bloomberg Valuation Services (BVAL) U.S. Insurers BBB index. This index is comprised primarily of insurance brokerage firms and was representative of the industry in which we operate. For the purpose of our analysis, the average BBB rate was assumed to be the appropriate borrowing rate for us.

We estimated market risk as the potential impact on the value of the debt recorded in our consolidated balance sheet based on a hypothetical one-percentage point change in our weighted average borrowing rate as of December 31, 2024. A one-percentage point decrease would result in an estimated fair value of $13,118.6 million, or $45.6 million more than their current carrying value. A one‑percentage point increase would result in an estimated fair value of $11,169.7 million, or $1,903.3 million less than their current carrying value.

As of December 31, 2024, there were no borrowings outstanding under our Credit Agreement and $225.2 million of borrowings outstanding under our Premium Financing Debt Facility. The fair value of these borrowings approximate their carrying value due to their short-term duration and variable interest rates associated with these debt obligations. Market risk is estimated as the potential increase in fair value resulting from a hypothetical one-percentage point decrease in our weighted average short-term borrowing rate at December 31, 2024 and the resulting fair values are not materially different from their carrying value.

We are subject to foreign currency exchange rate risk primarily from one of our larger U.K. based brokerage subsidiaries that incurs expenses denominated primarily in British pounds while receiving a substantial portion of its revenues in U.S. dollars. In addition, we are subject to foreign currency exchange rate risk from our Australian, Canadian, Indian, Jamaican, New Zealand, Norwegian, Singaporean and various Caribbean and Latin American operations because we transact business in their local denominated currencies. Foreign currency gains (losses) related to this market risk are recorded in earnings before income taxes as transactions occur. Assuming a hypothetical adverse change of 10% in the average foreign currency exchange rate for 2024 (a weakening of the U.S. dollar), earnings before income taxes would have increased by approximately $64.8 million. Assuming a hypothetical favorable change of 10% in the average foreign currency exchange rate for 2024 (a strengthening of the U.S. dollar), earnings before income taxes would have decreased by approximately $55.5 million. We are also subject to foreign currency exchange rate risk associated with the translation of local currencies of our foreign subsidiaries into U.S. dollars. We manage the balance sheets of our foreign subsidiaries, where practical, such that foreign liabilities are matched with equal foreign assets, maintaining a “balanced book” which minimizes the effects of currency fluctuations. However, our consolidated financial position is exposed to foreign currency exchange risk related to intra-entity loans between our U.S. based subsidiaries and our non-U.S. based subsidiaries that are denominated in the respective local foreign currency. A transaction that is in a foreign currency is first remeasured at the entity’s functional (local) currency, where applicable, (which is an adjustment to consolidated earnings) and then translated to the reporting (U.S. dollar) currency (which is an adjustment to consolidated stockholders’ equity) for consolidated reporting purposes. If the transaction is already denominated in the foreign entity’s functional currency, only the translation to U.S. dollar reporting is necessary. The remeasurement process required by U.S. GAAP for such foreign currency loan transactions will give rise to a consolidated unrealized foreign exchange gain or loss, which could be material, that is recorded in accumulated other comprehensive loss.

Historically, we have not entered into derivatives or other similar financial instruments for trading or speculative purposes. However, with respect to managing foreign currency exchange rate risk in India, Norway and the U.K., we have periodically purchased financial instruments to minimize our exposure to this risk. During 2024, 2023 and 2022, we had several monthly put/call options in place with an external financial institution that were designed to hedge a significant portion of our future Norway and the U.K. currency revenues through various future payment dates. In addition, during 2024, 2023 and 2022, we had several monthly put/call options in place with an external financial institution that were designed to hedge a significant portion of our Indian currency disbursements through various future payment dates. Although these hedging strategies were designed to protect us against significant India, Norway and the U.K. currency exchange rate movements, we are still exposed to some foreign currency exchange rate risk for the portion of the payments and currency exchange rate that are unhedged. All of these hedges are accounted for in accordance with ASC Topic 815, “Derivatives and Hedging”, and periodically are tested for effectiveness in accordance with such guidance. In the scenario where such hedge does not pass the effectiveness test, the hedge

will be re-measured at the stated point and the appropriate loss, if applicable, would be recognized. For the year ended December 31, 2024 there has been no such effect on our consolidated financial presentation. The impact of these hedging strategies was not material to our consolidated financial statements for 2024, 2023 and 2022. See Note 18 to our 2024 consolidated financial statements for the changes in fair value of these derivative instruments reflected in comprehensive earnings in 2024, 2023 and 2022.

Arthur J. Gallagher & Co.

Consolidated Statement of Earnings

(In millions, except per share data)

See notes to consolidated financial statements.

Arthur J. Gallagher & Co.

Consolidated Statement of Comprehensive Earnings

(In millions)

See notes to consolidated financial statements.

Arthur J. Gallagher & Co.

Consolidated B****alance Sheet

(In millions)

See notes to consolidated financial statements.

Arthur J. Gallagher & Co.

Consolidated State****ment of Cash Flows

(In millions)

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There were no changes in or disagreements with our accountants on matters related to accounting and financial disclosure.

Conclusion Regarding the Effectiveness of Disclosure Controls and Procedures.

We carried out an evaluation required by the Exchange Act, under the supervision and with the participation of our principal executive officer and principal financial officer, of the effectiveness of the design and operation of our disclosure controls and procedures, as defined in Rule 13a-15(e) of the 1934 Act, as of the end of the period covered by this report. Based on this evaluation, our principal executive officer and principal financial officer concluded that our disclosure controls and procedures were effective to provide reasonable assurance that information required to be disclosed by us in the reports that we file or submit under the 1934 Act is recorded, processed, summarized, and reported within the time periods specified in the SEC’s rules and forms and to provide reasonable assurance that such information is accumulated and communicated to our management, including our principal executive officer and principal financial officer, as appropriate to allow timely decisions regarding required disclosure.

Design and Evaluation of Internal Control over Financial Reporting.

Our disclosure controls and procedures are designed to provide reasonable assurance of achieving their objectives as specified above. Management does not expect, however, that our disclosure controls and procedures will prevent or detect all error and fraud. Any control system, no matter how well designed and operated, is based upon certain assumptions and can provide only reasonable, not absolute, assurance that its objectives will be met. Further, no evaluation of controls can provide absolute assurance that misstatements due to error or fraud will not occur or that all control issues and instances of fraud, if any, within the Company have been detected. Pursuant to Section 404 of the Sarbanes-Oxley Act of 2002, we included a report of management’s assessment of the design and effectiveness of our internal controls as part of this annual report for the fiscal year ended December 31, 2024. Our independent registered public accounting firm also attested to, and reported on, the effectiveness of internal control over financial reporting. Management’s report and the independent registered public accounting firm’s attestation report are included in Item 8, “Financial Statements and Supplementary Data,” under the captions entitled “Management’s Report on Internal Control Over Financial Reporting” and “Report of Independent Registered Public Accounting Firm on Internal Control Over Financial Reporting.”

Changes in Internal Control over Financial Reporting.

During the three-month period ended December 31, 2024, there has not occurred any change in our internal control over financial reporting that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

During the three-month period ended December 31, 2024, no director or officer adopted or terminated any Rule 10b5-1 trading arrangement or non-Rule 10b5-1 trading arrangement, as each term is defined in Item 408(a) of Regulation S-K.

None.

Part III

Our 2025 Proxy Statement will include the information required by this item under the headings “Election of Directors,” “Other Board Matters,” “Board Committees,” “Insider Trading Policy” and, if necessary, “Delinquent Section 16(a) Reports,” which we incorporate herein by reference.

Our 2025 Proxy Statement will include the information required by this item under the headings “Compensation Committee Report” and “Compensation Discussion and Analysis,” which we incorporate herein by reference.

Our 2025 Proxy Statement will include the information required by this item under the headings “Security Ownership by Certain Beneficial Owners and Management” and “Equity Compensation Plan Information,” which we incorporate herein by reference.

Our 2025 Proxy Statement will include the information required by this item under the headings “Certain Relationships and Related Transactions” and “Other Board Matters,” which we incorporate herein by reference.

Our independent registered public accounting firm is Ernst & Young LLP, Chicago, Illinois, Auditor Firm ID: 42.

Our 2025 Proxy Statement will include the information required by this item under the heading “Ratification of Appointment of Independent Auditor - Principal Accountant Fees and Services,” which we incorporate herein by reference.

Part IV

The following documents are filed as a part of this report:

Consolidated Financial Statements:

(a)

Consolidated Statement of Earnings for each of the three years in the period ended December 31, 2024.

(b)

Consolidated Balance Sheet as of December 31, 2024 and 2023.

(c)

Consolidated Statement of Cash Flows for each of the three years in the period ended December 31, 2024.

(d)

Consolidated Statement of Stockholders’ Equity for each of the three years in the period ended December 31, 2024.

(e)

Notes to Consolidated Financial Statements.

(f)

Report of Independent Registered Public Accounting Firm on Financial Statements.

(g)

Management’s Report on Internal Control Over Financial Reporting.

(h)

Report of Independent Registered Public Accounting Firm on Internal Control Over Financial Reporting.

Consolidated Financial Statement Schedules required to be filed by Item 8 of this Form:

(a)

Schedule II - Valuation and Qualifying Accounts.

All other schedules are omitted because they are not applicable, or not required, or because the required information is included in our consolidated financial statements or the notes thereto. Exhibits:

All other exhibits are omitted because they are not applicable, or not required, or because the required information is included in our consolidated financial statements or the notes thereto. The registrant agrees to furnish to the Securities and Exchange Commission upon request a copy of any long-term debt instruments that have been omitted pursuant to Item 601(b)(4)(iii)(A) of Regulation S-K.

^ Certain exhibits and schedules have been omitted pursuant to Item 601(b)(2) of Regulation S-K. The Company hereby undertakes to furnish supplemental copies of any of the omitted exhibits and schedules upon request by the SEC; provided, however, that the Company may request confidential treatment pursuant to Rule 24b-2 of the Securities Exchange Act of 1934, as amended, for any exhibits or schedules so furnished.

• Such exhibit is a management contract or compensatory plan or arrangement required to be filed as an exhibit to this form pursuant to item 601 of Regulation S-K.

None.

Signat****ures

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized on the 17****th day of February, 2025.

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below on the 17****th day of February, 2025 by the following persons on behalf of the Registrant in the capacities indicated.

Schedu****le II

Arthur J. Gallagher & Co.

Valuation and Qualifying Accounts

(1)

Net activity of bad debt write offs and recoveries and acquired businesses.

(2)

Net activity to allowance related to acquired businesses.

(3)

Elimination of fully amortized expiration lists, non-compete agreements and trade names, intangible asset/amortization reclassifications and disposal of acquired businesses.