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Item 1A. Risk Factors

Economic Risks

Adverse economic conditions, a reduction in client spending, a deterioration in the credit markets or a delay in client payments could have a material effect on our business, results of operations and financial condition.

Macroeconomic conditions have a direct impact on our business, results of operations and financial condition. Adverse economic conditions, including geopolitical events, international hostilities, acts of terrorism, public health crises, inflation or stagflation, tariffs and other trade barriers, central bank interest rate policies in countries that comprise our major markets and labor and supply chain issues affecting the distribution of our clients’ products, or a disruption in the credit markets, pose a risk that clients may reduce, postpone or cancel spending for marketing and communications services. Such actions would reduce the demand for our services and could result in a reduction in our revenue, which would adversely affect our business, results of operations and financial condition. A contraction or disruption in the credit markets may make it more difficult for us to meet our working capital requirements or refinance maturing debt, or negatively impact our clients’ liquidity that could cause them to delay payment or take other actions that would negatively affect our working capital. In such circumstances, we may need to obtain additional financing to fund our day-to-day working capital requirements, which may not be available on favorable terms, or at all. Even if we take action to respond to adverse economic conditions, reductions in revenue and disruptions in the credit markets by aligning our cost structure and more efficiently managing our working capital, such actions may not be effective.

A period of sustained inflation across our major markets could result in higher operating costs.

Our principal operating expenses are salary and service costs and occupancy and related costs. Inflationary pressures typically result in increases to our operating expenses. In cases of sustained inflation across several of our major markets, it may become increasingly difficult to effectively control increases to our costs. In addition, the effects of inflation on consumer budgets could result in the reduction of our clients’ spending plans on the marketing and communications services we provide. If we are unable to increase our fees or take other actions to mitigate the effect of the resulting higher costs, our business, results of operations and financial condition could be negatively impacted.

In an economic downturn, the risk of a material loss related to media purchases and production costs incurred on behalf of our clients could significantly increase, and methods for managing or mitigating such risk may be less available or unavailable.

In the normal course of business, our agencies enter into contractual commitments with media providers and production companies on behalf of our clients at levels that can substantially exceed the revenue from our services. These commitments are included in accounts payable when the services are delivered by the media providers or production companies. If permitted by local law and the client agreement, many of our agencies purchase media and production services for our clients as an agent for a disclosed principal. In addition, while operating practices vary by country, media type and media vendor, in the United States and certain foreign markets, many of our agencies’ contracts with media and production providers specify that our agencies are not liable to the media and production providers under the theory of sequential liability until and to the extent we have been paid by our client for the media or production services.

Where purchases of media and production services are made by our agencies as a principal or are not subject to the theory of sequential liability, the risk of a material loss as a result of payment default by our clients could increase significantly, and such a loss could have a material adverse effect on our business, results of operations and financial condition.

While we use various methods to manage the risk of payment default, including obtaining credit insurance, requiring payment in advance, mitigating the potential loss in the marketplace or negotiating with media providers, these may be insufficient, less available, or unavailable during a severe economic downturn.

Geopolitical events, international hostilities or acts of terrorism could have a material adverse effect on our business, results of operations and financial condition.

Current or future geopolitical events, international hostilities or acts of terrorism could impact global economies through, among other things, disruption of business operations and demand for client services, disruption in the credit markets, heightened risk of cybersecurity attacks and disruptions to our information technology infrastructure, increased energy costs and labor and supply chain disruptions. This could result in suspension of our, or our clients’ businesses in the affected region, which could impact client spending on our services. These actions could have a significant and adverse impact our business, results of operations and financial condition in the future. For example, as a result of the war in Ukraine, in the first quarter of 2022, we suspended our business operations in Ukraine and disposed of all our businesses in Russia. In addition, economic sanctions were imposed on Russia by the United States, United Kingdom, and the European Union. The war in Ukraine is ongoing, and its duration is uncertain. We cannot predict the impact of the war in Ukraine or other international hostilities on our businesses and operations.

Global public health crises or pandemics or other similar health crises could adversely impact our business, results of operations and financial condition.

When a public health crisis arises, demand for certain of our services may be adversely affected by government measures, including restrictions on travel and business operations and quarantine and stay-at-home orders arising from the occurrence of a pandemic, or similar global public health crises. The extent of the impact on our business will depend on numerous factors that we are not able to accurately predict, including the geographic regions that may be affected.

Business and Operational Risks

Clients periodically review and change their marketing and communications requirements and relationships. If we are unable to remain competitive or retain key clients, our business, results of operations and financial condition may be adversely affected.

We operate in a highly competitive industry. Key competitive considerations for retaining existing clients and winning new clients include our ability to develop solutions that meet client needs in a rapidly changing environment, the quality and effectiveness of our services and our ability to serve clients efficiently, particularly large multinational clients, on a broad geographic basis. From time to time, clients may put their marketing and communications business up for competitive review. We have won and lost accounts as a result of these reviews. To the extent that we are not able to remain competitive or retain key clients, our revenue may be adversely affected, which could have a material adverse effect on our business, results of operations and financial condition.

Acquiring new clients and retaining existing clients depends on our ability to avoid and manage conflicts of interest arising from other client relationships, retaining key personnel and maintaining a highly skilled workforce.

Our ability to acquire new clients and retain existing clients may, in some cases, be limited by clients’ perceptions of, or policies concerning, conflicts of interest arising from our other client relationships. If we are unable to maintain multiple agencies to manage multiple client relationships and avoid potential conflicts of interests, our business, results of operations and financial condition may be adversely affected.

As a service business, our ability to attract and retain key personnel is an important aspect of our competitiveness. If we are unable to attract and retain key personnel, our ability to provide our services in the manner clients have come to expect may be adversely affected, which could harm our reputation and result in a loss of clients, which could have a material adverse effect on our business, results of operations and financial condition.

The loss of several of our largest clients could have a material adverse effect on our business, results of operations and financial condition.

In 2024, our largest client represented approximately 2.7% and our 100 largest clients represented approximately 54% of our revenue. Clients generally are able to reduce or cancel current or future spending on marketing and communications services at any time on short notice for any reason. A significant reduction in spending on our services by our largest clients, or the loss of several of our largest clients, if not replaced by new clients or an increase in business from existing clients, would adversely affect our revenue and could have a material adverse effect on our business, results of operations and financial condition.

We rely extensively on information technology systems, and cybersecurity incidents could adversely affect us.

We rely on our own and third-party service providers’ information technology systems and infrastructure to connect with our clients, people and others, and to collect, store, transfer, process and use business, personal and financial data. We face cybersecurity risks that threaten the confidentiality, integrity and availability of our information technology systems or data stored on such systems. Additionally, hardware, software applications or services that we develop or procure from third parties may contain defects in design or manufacture or other problems that could compromise the confidentiality, integrity or availability of our information technology systems or data stored on such systems.

Cybersecurity threats and attacks, including computer viruses, advanced persistent threats, malware, hacking, ransomware or other destructive or disruptive activities or software, are constantly evolving and pose a risk to our information technology systems and data. There can be no assurance that our cybersecurity risk management program and processes will be fully implemented, complied with or effective in detecting and preventing such threats or protecting our information technology systems or data. Security breaches, improper use of our systems and unauthorized access to our data and information by employees and others may pose a risk that data may be exposed to unauthorized persons. Such occurrences could adversely affect our business, results of operations, financial condition and reputation and could result in litigation or regulatory action, as discussed below. Also, we have acquired or may acquire companies that have cybersecurity vulnerabilities or different cybersecurity risk management processes, which may increase our risks from cybersecurity threats and attacks.

In addition, we make extensive use of third-party service providers, including cloud providers, that store, transmit and process data. These third-party service providers are also subject to malicious attacks and cybersecurity threats that could adversely affect our business, results of operations, financial condition and reputation and could result in litigation or regulatory action, as discussed below.

Currently, many of our agencies operate in a flexible working environment that allows for partial remote work. The number of personnel working remotely varies by market and is dependent on local conditions. When our employees work remotely, the risk of cybersecurity incidents and attacks and unauthorized exposure of sensitive business and client advertising and marketing information, as well as personal data or information, increases.

We and certain of our third-party providers regularly experience cyberattacks and other incidents, and we expect such attacks and incidents to continue. For example, we have experienced cybersecurity incidents that resulted in the disruption of our information technology systems and required us to engage third parties to remediate the issues. While, to date, no incidents have had a material impact on our operations or financial results, we cannot guarantee that material incidents will not occur in the future. Any attack or incident could result in legal claims or proceedings (such as class actions), regulatory investigations and enforcement actions, fines and penalties, negative reputational impacts, and/or significant incident response, system restoration or remediation and future compliance costs, which could materially adversely affect our business, results of operations and financial condition. We also cannot guarantee that any such costs or losses will be covered by our existing insurance policies or that applicable insurance will be available to us in the future on economically reasonable terms or at all.

We are subject to risks related to our use of generative AI, a new and emerging technology, which is in the early stages of commercial use.

We continually evaluate the use of AI in our business processes, and in 2023, we entered into strategic partnerships with leading AI technology companies, enabling enhanced product and service capabilities in generative AI. In recent years, the use of AI has come under increased scrutiny. This technology, which is a new and emerging technology in early stages of commercial use, presents a number of risks inherent in its use, including ethical considerations, public perception and reputation concerns, intellectual property protection, regulatory compliance and privacy and data security concerns, all of which could have a material adverse effect on our business, results of operations and financial condition. Further, new laws, guidance and decisions in this area may limit our ability to use AI or decrease its usefulness. As a result, we cannot predict future developments in AI and related impacts to our business and our industry. If we fail to increase our capabilities in generative AI, or if we are unable to successfully adapt to new developments related to the risks and challenges associated with AI, demand for our services could be reduced, and our business, results of operations and financial condition could be negatively impacted.

Risks Related to International Operations

Currency exchange rate fluctuations have impacted, and in the future could impact, our business, results of operations and financial condition.

In 2024, our international operations represented approximately 48% of our revenue. We operate in all major international markets including the Euro Zone, the United Kingdom, or the U.K., Australia, Brazil, Canada, China and Japan. Our agencies transact business in more than 50 different currencies. Substantially all of our foreign operations transact business in their local currency and, accordingly, their financial statements are translated into U.S. Dollars. As a result, both adverse and beneficial fluctuations in foreign exchange rates impact our business, results of operations and financial condition. In addition, funds transferred to the United States can be adversely or beneficially impacted by changes in foreign currency exchange rates.

We operate in high-growth markets and developing countries, which often carry greater risks and uncertainties that could have a material adverse effect on our business, results of operations and financial condition.

The operational and financial performance of our international businesses are affected by global and regional economic conditions, competition for new business and personnel, currency exchange rate fluctuations, political conditions, differing tax and regulatory environments and other risks associated with extensive international operations. We conduct business in numerous high-growth markets and developing countries. Such countries tend to have longer billing collection cycles, currency repatriation restrictions and commercial laws that can be undeveloped, vague, inconsistently enforced, retroactively applied or frequently changed. Our operations are also subject to the United States Foreign Corrupt Practices Act and other anti-corruption and anti-

bribery laws and regulations. These laws and regulations are complex and stringent, and any changes and violations could have an adverse effect on our business and reputation. Our business, results of operations and financial condition can be adversely affected if we are unable to effectively operate, or manage the risks associated with operating in these markets and countries. For financial information by geographic region, see Notes 3 and 8 to the consolidated financial statements.

Risks Related to Acquisitions

We may be unsuccessful in evaluating material risks involved in completed and future acquisitions.

We regularly evaluate potential acquisitions of businesses that are complementary to our businesses and service offerings, and in some cases, associated technological capabilities and assets. As part of the process, we conduct business, legal and financial due diligence to identify and evaluate material risks involved in any particular transaction, including business strategy and operational execution. Despite our efforts, we may be unsuccessful in ascertaining or evaluating all such risks. As a result, the intended advantages of any given acquisition may not be realized. If we fail to identify certain material risks from one or more acquisitions, our business, results of operations and financial condition could be adversely affected.

Our goodwill is an intangible asset that may become impaired, which could have a material adverse effect on our business, results of operations and financial condition.

In accordance with generally accepted accounting principles in the United States, or U.S. GAAP or GAAP, we have recorded a significant amount of goodwill related to our acquisitions; a substantial portion of which represents the intangible specialized know-how of the acquired workforce. As discussed in Note 2 to the consolidated financial statements, we review the carrying value of goodwill for impairment annually on May 1 and whenever events or circumstances indicate the carrying value may not be recoverable. The estimates and assumptions about future results of operations and cash flows made in connection with the impairment testing could differ from future actual results of operations and cash flows. While we have concluded, for each year presented in the financial statements included in this report, that our goodwill is not impaired, future events could cause us to conclude that the goodwill associated with a given operation may become impaired. Any resulting non-cash impairment charge could have a material adverse effect on our business, results of operations and financial condition.

Risks Related to the Proposed Merger with IPG

The Merger may not be completed, and the Merger Agreement may be terminated in accordance with its terms.

The Merger is subject to a number of conditions that must be satisfied or waived prior to the completion of the Merger, including, among others, the approval by our stockholders of our share issuance proposal, the approval by IPG stockholders of the proposal to adopt the Merger Agreement, the receipt of requisite regulatory approvals and the approval for listing on the New York Stock Exchange, or NYSE, of the shares of our common stock issuable to IPG stockholders pursuant to the Merger Agreement.

These conditions to the completion of the Merger may not be satisfied or waived in a timely manner or at all, and, accordingly, the Merger may be delayed or may not be completed. In addition, if the Merger is not completed by December 8, 2025, which date may be extended to June 8, 2026 in certain circumstances, either we or IPG may choose not to proceed with the Merger by terminating the Merger Agreement, and the parties can mutually decide to terminate the Merger Agreement at any time, before or after stockholder approval. In addition, we and IPG may elect to terminate the Merger in certain other circumstances as set forth in the Merger Agreement. If the Merger Agreement is terminated under specified circumstances, Omnicom would be required to pay IPG a termination fee of $676 million. Additionally, if the Merger Agreement is terminated in circumstances where the Omnicom shareholders have not approved our share issuance proposal, then Omnicom has agreed to reimburse IPG’s expenses up to $25 million.

Failure to complete the Merger could negatively impact the price of shares of our common stock, as well as our business and results of operations.

If the Merger is not completed for any reason, our business and results of operations may be adversely affected and, without realizing any of the benefits of having completed the Merger, we would be subject to a number of risks, including:

•we may experience negative reactions from the financial markets, including negative impacts on the market price of our common stock;

•we may experience negative reactions from clients, vendors, joint venture participants and other third parties with whom we do business, which in turn could affect our business operations or our ability to compete for new business or obtain renewals in the marketplace more broadly;

•we may experience negative reactions from employees;

•we will still be required to pay certain significant costs relating to the Merger, such as legal, accounting, financial advisor and printing fees; and

•we will have expended time and resources that could otherwise have been spent on our existing business and the pursuit of other opportunities that could have been beneficial to us, and our ongoing business and results of operations may be adversely affected.

If the Merger Agreement is terminated under specified circumstances, we may be required to pay IPG a termination fee or other termination‐related payment as discussed above.

Uncertainties associated with the Merger may cause a loss of our and IPG’s management personnel and other key employees, which could adversely affect the business and operations of the combined company following the Merger.

Each of Omnicom and IPG depends on the experience and industry knowledge of its officers and other key employees to execute its business plans. The success of the combined company after the Merger will depend, in part, on its ability to retain key management personnel and other key employees. Our and IPG’s current and prospective employees may experience uncertainty about their roles within the combined company following the Merger or other concerns regarding the timing and completion of the Merger or the operations of the combined company following the Merger, any of which may have an adverse effect on our and IPG’s ability to retain or attract key management and other key personnel. If we or IPG are unable to retain personnel, including our or IPG’s key management, who are critical to the future operations of the companies, we and IPG could face disruptions in our respective operations, loss of existing clients, loss of key information, expertise or know‐how and unanticipated additional recruitment and training costs. In addition, the loss of our and IPG’s key personnel could diminish the anticipated benefits of the Merger. No assurance can be given that the combined company, following the Merger, will be able to retain or attract our and IPG’s key management personnel and other key employees to the same extent that we and IPG have previously been able to retain or attract personnel.

Our and IPG’s business relationships may be subject to disruption due to uncertainty associated with the Merger, which could have a material effect on our business, results of operations, financial condition and cash flows or those of the combined company following the Merger.

Parties with whom we or IPG do business may experience uncertainty associated with the Merger, including with respect to current or future business relationships with us or IPG following the Merger. Our and IPG’s business relationships may be subject to disruption as clients, vendors, landlords, joint venture participants and other third parties with whom we or IPG do business may attempt to delay or defer entering into new business relationships, negotiate changes in existing business relationships or consider entering into business relationships with parties other than us or IPG. These disruptions could have a material and adverse effect on our and IPG’s business, results of operations, financial condition and cash flows, regardless of whether the Merger is completed, as well as a material and adverse effect on the combined company’s ability to realize the expected cost savings, operating synergies and other benefits of the Merger. The risk, and adverse effects, of any disruption could be exacerbated by a delay in completion of the Merger or termination of the Merger Agreement.

The Merger Agreement subjects us to restrictions on business activities prior to the effective time of the Merger.

The Merger Agreement restricts us from entering into certain corporate transactions and taking other specified actions without the consent of IPG and generally requires us to continue our operations in the ordinary course through the completion of the Merger. These restrictions could be in place for an extended period of time if completion of the Merger is delayed and could prevent us from pursuing attractive business opportunities that may arise prior to the completion of the Merger.

We are expected to incur significant costs in connection with the Merger and integration of the two companies, which may be in excess of those anticipated by us.

We have incurred and expect to continue to incur costs associated with negotiating and completing the Merger and combining the operations of the two companies. These costs have been, and will continue to be, substantial. The substantial majority of costs will consist of transaction costs related to the Merger and include, among others, fees paid to financial, legal and accounting advisors, filing fees, employee retention and other employment-related costs, and debt restructuring costs. Many of these costs will be borne by us even if the Merger is not completed.

We will also incur transaction costs related to formulating and implementing integration plans, including facilities, systems and service contract consolidation costs and employment‐related costs. We will continue to assess the magnitude of these costs, and additional unanticipated costs may be incurred in connection with the Merger and the integration of the two companies’ businesses. Although we expect that the elimination of duplicative costs, as well as the realization of other synergies related to the integration of the businesses, should allow the combined company to offset integration‐related costs over time, this net benefit may not be achieved in the near term, or at all. For additional information, see “Risk Factors - The failure to integrate our and IPG’s businesses and operations successfully in the expected time frame may adversely affect the combined company’s business and results of operations.” The costs described above, as well as other unanticipated costs and expenses, could adversely affect the results of operations, financial condition and cash flows of the combined company following the completion of the Merger.

Litigation relating to the Merger, if any, could result in an injunction preventing the completion of the Merger and/or substantial costs to us.

Securities class action lawsuits and derivative lawsuits are often brought against public companies that have entered into acquisition, merger or other business combination agreements like the Merger Agreement. Even if such a lawsuit is without merit, defending against these claims can result in substantial costs and divert management time and resources. An adverse judgment could result in monetary damages, which could have a negative impact on our liquidity and financial condition. Lawsuits that may be brought against us, IPG, or our or their directors could also seek, among other things, injunctive relief or other equitable relief, including a request to rescind parts of the Merger Agreement already implemented and to otherwise enjoin the parties from consummating the Merger. One of the conditions to the closing of the Merger is that no Law or Order (each as defined in the Merger Agreement) is promulgated, entered, enforced, enacted or issued by any governmental entity of competent jurisdiction in which we, IPG, or our or their subsidiaries have material assets or material business operations, which prohibits, restrains or makes illegal the consummation of the Merger. Consequently, if a plaintiff is successful in obtaining an injunction prohibiting completion of the Merger, that injunction may delay or prevent the Merger from being completed within the expected timeframe or at all, which may adversely affect our businesses, results of operations, financial condition and cash flows. In addition, either we or IPG may terminate the Merger Agreement if any Law or Order has been promulgated, entered, enforced, enacted or issued by any governmental entity of competent jurisdiction in which we, IPG, or our or their subsidiaries have material assets or material business operations, which is in effect and permanently prohibits, restrains, enjoins or makes illegal the consummation of the Merger, so long as our or Merger Sub’s (in the case of a termination by us) or IPG’s (in the case of a termination by IPG) material breach of any obligations under the Merger Agreement has not been the primary cause of, or resulted in, the enactment or issuance of such Law or Order, decree, ruling, injunction or other action.

There can be no assurance that any of the defendants would be successful in the outcome of any potential future lawsuits. The defense or settlement of any lawsuit or claim that remains unresolved at the time the Merger is completed may adversely affect the combined company’s business, results of operations, financial condition and cash flows.

The failure to integrate our and IPG’s businesses and operations successfully in the expected time frame may adversely affect the combined company’s business and results of operations.

We and IPG have operated and, until the completion of the Merger, will continue to operate independently. Following the completion of the Merger, our and IPG’s businesses may not be integrated successfully. It is possible that the integration process could result in the loss of our or IPG’s key employees, the loss of clients, service providers, vendors or other business counterparties, the disruption of either company’s or both companies’ ongoing businesses, inconsistencies in standards, controls, procedures and policies, potential unknown liabilities and unforeseen expenses, delays, or regulatory conditions associated with and following completion of the Merger; or higher‐than‐expected integration costs and an overall post‐completion integration process that takes longer than originally anticipated. Specifically, the following challenges, among others, must be addressed in integrating our and IPG’s operations in order to realize the anticipated benefits of the Merger:

•combining the companies’ operations and corporate functions and the resulting difficulties associated with managing a larger, more complex, diversified business;

•combining our and IPG’s businesses in a manner that permits the combined company to achieve the cost savings and operating synergies anticipated to result from the Merger;

•avoiding delays in connection with the completion of the Merger or the integration process;

•integrating personnel from the two companies and minimizing the loss of key employees;

•identifying and eliminating redundant functions and assets;

•harmonizing the companies’ operating practices, employee development and compensation programs, internal controls and other policies, procedures and processes;

•maintaining existing agreements with clients, service providers, vendors and other business counterparties and avoiding delays in entering into new agreements with prospective clients, service providers, vendors and other business counterparties;

•addressing possible differences in business backgrounds, corporate cultures and management philosophies; and

•consolidating the companies’ operating, administrative and information technology infrastructure and financial systems.

In addition, at times the attention of certain members of either company’s or both companies’ management and resources may be focused on completion of the Merger and the integration of the businesses of the two companies and may reduce their availability for day‐to‐day business operations or other opportunities that may be beneficial, which may disrupt each company’s ongoing operations and the operations of the combined company.

The Merger may result in a loss of our and IPG’s clients, service providers, vendors, joint venture participants and other business counterparties, and may result in the termination of existing contracts.

Following the Merger, some of our and IPG’s clients, service providers, vendors, joint venture participants and other business counterparties may terminate or scale back their current or prospective business relationships with the combined company. In addition, we and IPG have contracts with clients, service providers, vendors, joint venture participants and other business counterparties that may require us or IPG to obtain consents from these other parties in connection with the Merger, which may not be obtained on favorable terms or at all. If relationships with clients, service providers, vendors, joint venture participants and other business counterparties are adversely affected by the Merger, or if the combined company, following the Merger, loses the benefits of the contracts of Omnicom or IPG, the business, results of operations, financial condition and cash flows of the combined company could be adversely affected.

The combined company may fail to realize all of the anticipated benefits of the Merger.

The success of the Merger will depend, in part, on our ability to realize the cost savings, operating synergies and other benefits from combining our and IPG’s businesses. The anticipated cost savings, operating synergies and other benefits of the Merger may not be realized fully or at all, may take longer to realize than expected, or may result in other adverse effects that we do not currently foresee, in which case, among other things, the Merger may not be accretive to adjusted earnings per share for both us and IPG and may not generate significant cash to return to stockholders via share repurchases or other means. Some of the assumptions that we and IPG have made, such as the achievement of the anticipated benefits related to combining complementary assets to create a portfolio of services and produces that expand client opportunities, and advances in both companies’ ability to innovate and develop new products and services, may not be realized. The integration process may, for each of us and IPG, result in the loss of key employees, the disruption of ongoing businesses or inconsistencies in standards, controls, procedures and policies. In addition, there could be potential unknown liabilities and unforeseen expenses associated with the Merger that could adversely impact the combined company.

The future results of the combined company following the Merger will suffer if the combined company does not effectively manage its expanded operations.

Following the Merger, the size and complexity of the combined company will increase significantly compared to the separate businesses of each of Omnicom and IPG. The combined company’s future success will depend, in part, upon its ability to manage this expanded business, which will pose substantial challenges for management, including challenges related to the management of a larger number of operations and geographies and associated increased costs and complexity. The combined company may also face increased scrutiny from, and/or additional regulatory requirements of, governmental authorities as a result of the significant increase in the size and complexity of the business. There can be no assurances that the combined company will be successful or that it will realize the expected operating synergies, cost savings or other benefits currently anticipated from the Merger.

Legal and Regulatory Risks

Laws and regulations and actions of consumer advocates may limit the scope and content of our services, affect our ability to meet our clients’ needs, result in third-party claims, litigation, regulatory proceedings or government investigations, or otherwise have a material adverse effect on our business, results of operations and financial condition.

Government agencies and consumer groups directly or indirectly affect or attempt to affect the scope, content and manner of presentation of marketing and communications services, through regulation or other governmental action, which could affect our ability to meet our clients’ needs. Such regulation may seek, among other things, to limit the tax deductibility of advertising expenditures by certain industries or for certain products and services. In addition, there has been a tendencyonthepartofbusinessestoresorttothejudicialsystemtochallengeadvertisingpracticesandclaims,whichcouldcause our clients affected by such actions to reduce their spending on our services, and from time to time we may be subject to claims, lawsuits, regulatory proceedings or government investigations into whether our business practices comport with applicable law. Regardless of the merit of such claims, lawsuits, proceedings or investigations, defending against them could cost us a significant amount of time and money and result in negative publicity. Any regulatory or judicial action that affects our ability to meet our clients’ needs or reduces client spending on our services could have a material adverse effect on our business, results of operations and financial condition.

Compliance with ever evolving federal, state, and foreign laws relating to the handling of information about individuals involves significant expenditure and resources, and any failure by us or our vendors to comply could materially adversely affect our business, results of operations and financial condition.

We, and third-party vendors on our behalf, process information related to individuals, including from and about individuals we may advertise to, actual and prospective clients, employees, and service providers. We and our vendors are subject to a variety of federal, state, and foreign laws, rules, regulations, industry standards, and other requirements related to privacy, use of personal information, marketing and advertising, and internet tracking technologies. These requirements, and their application, interpretation, and amendments are constantly evolving and developing.

Among other things, such laws generally: require disclosures about the data collection, use, and disclosure practices of covered businesses, and provide individuals expanded rights to access, delete, and correct their personal information, and opt out of certain sales or transfers of personal information.

Our obligations related to data privacy and security are quickly changing in an increasingly stringent fashion, creating some uncertainty as to the future legal framework governing such matters. Preparing for and complying with these obligations requires us to devote significant resources. These obligations may necessitate changes to our practices and to those of any third parties that process personal data on our behalf. In addition, these laws, rules, and regulations could also affect the acceptance of new communications technologies and the use of current communications technologies as advertising media.

Any failure or perceived failure by us, or third parties on which we depend, to comply with data privacy laws, rules, regulations, industry standards and other requirements could result in legal claims or proceedings (such as class actions), regulatory investigations and enforcement actions, fines and penalties, negative reputational impacts and future compliance costs, which could materially and adversely affect our business, results of operations and financial condition. We also cannot guarantee that any such costs or losses will be covered by our existing insurance policies or that applicable insurance will be available to us in the future on economically reasonable terms or at all. Any of the foregoing could also affect our business and reduce demand for certain of our services, which could have a material adverse effect on our business, results of operations and financial condition.

Expectations relating to environmental, social and governance considerations expose us to potential liabilities, reputational harm and other unforeseen adverse effects on our business.

Many governments, regulators, investors, employees, customers and other stakeholders are focused on environmental, social and governance considerations relating to businesses, including climate change and greenhouse gas emissions, human capital and diversity, equity and inclusion. We make statements about our environmental, social and governance goals and initiatives through information provided on our website, press statements and other communications, including through our Corporate Responsibility Report. Responding to these environmental, social and governance considerations and implementation of these goals and initiatives involves risks and uncertainties and requires ongoing investments. The success of our goals and initiatives may be impacted by factors that are outside our control. In addition, some stakeholders may disagree with our goals and initiatives and the focus and views of stakeholders may change and evolve over time and vary depending on the jurisdictions in which we operate. Any failure, or perceived failure, by us to achieve our goals, further our initiatives, adhere to our public statements, comply with federal, state or international environmental, social and governance laws and regulations, or meet evolving and varied stakeholder expectations and views could materially adversely affect our business, reputation, results of operations, financial condition and stock price.

Item 1B. Unresolved Staff Comments

None.

Item 1C. Cybersecurity

Cybersecurity Risk Management and Strategy

We have developed and implemented a cybersecurity risk management program intended to protect the confidentiality, integrity, and availability of our critical systems and information. Our cybersecurity risk management program includes a cybersecurity incident response plan.

We use the National Institute of Standards and Technology Cybersecurity Framework, or NIST CSF, and the ISO 27001 framework as published by the International Organization for Standardization as guides to help us identify, assess, and manage cybersecurity risks relevant to our business. We have designed and assessed our program based on the NIST CSF and ISO 27001. This does not imply that we meet any particular technical standards, specifications, or requirements.

Our cybersecurity risk management program is integrated into our overall enterprise risk management program; and shares common methodologies, reporting channels, and governance processes that apply across the enterprise risk management program to other legal, compliance, strategic, operational, and financial risk areas.

Key aspects of our cybersecurity risk management program include:

•risk assessments designed to help identify material cybersecurity risks to our critical systems, and information;

•an internal security staff principally responsible for managing our cybersecurity risk assessment processes, our security controls, and our response to cybersecurity incidents;

•the use of external service providers, where appropriate, to assess, test, or otherwise assist with aspects of our security controls;

•cybersecurity awareness training of our employees, incident response personnel, and senior management;

•a cybersecurity incident response plan that includes procedures for responding to cybersecurity incidents; and

•a third-party risk management process for key service providers, suppliers, and vendors, including cloud-related service providers.

While we have experienced cybersecurity incidents that resulted in the disruption of our information technology systems and required us to engage third parties to remediate the issues, we have not identified risks from known cybersecurity threats, including as a result of any prior cybersecurity incidents, that have materially affected or are reasonably likely to materially affect us, including our operations, results of operations, or financial condition. We face certain ongoing risks from cybersecurity threats that, if realized, are reasonably likely to materially affect us, including our business, results of operations and financial condition. See Item 1A, “Risk Factors - We rely extensively on information technology systems, and cybersecurity incidents could adversely affect us.”

Cybersecurity Governance

Our Board of Directors, or Board, considers cybersecurity risk as part of its risk oversight function and has delegated to its Audit Committee oversight of cybersecurity and other information technology risks. Our Audit Committee oversees management’s ongoing activities related to our cybersecurity risk management program.

Our Audit Committee receives periodic reports from management on our cybersecurity risks. In addition, management updates the Audit Committee, as necessary, regarding cybersecurity incidents.

Our Audit Committee reports to the full Board regarding its activities, including those related to cybersecurity. The full Board also receives briefings from management on our cybersecurity risk management program. Board members receive presentations on cybersecurity topics from our Chief Information Officer, or CIO, Chief Information Security Officer, or CISO, and Chief Information Risk Officer, or CIRO, and other security staff as part of the Board’s continuing education on topics that impact the Company.

Our management team, including our CIO, CISO and CIRO, is responsible for assessing and managing our material risks from cybersecurity threats. The team has primary responsibility for our overall cybersecurity risk management program and supervises both our internal cybersecurity personnel and our retained external cybersecurity advisors. Our Information Technology (IT) management team collectively holds over 50 years of strategic IT and global transformational experience, including having held IT advisory roles with top-tier organizations. Each member of the team has experience operating in complex, international business environments. The IT management team has demonstrated achievement in Information Security strategy development, risk management and implementation of security and risk management programs that drive awareness, decrease exposure and strengthen organizational IT controls.

Our management team is informed about and monitors the prevention, detection, mitigation, and remediation of key cybersecurity risks and incidents through various means, which may include briefings from internal security personnel, threat intelligence and other information obtained from governmental, public or private sources, including external advisors engaged by us, and alerts and reports produced by security tools deployed in the IT environment.

Item 2. Properties

We conduct business and maintain offices throughout the world. The facility requirements of our businesses are similar across geographic regions and disciplines. Substantially all our office space is leased under operating leases with varying expiration dates. Lease obligations of our foreign operations are generally denominated in their local currency. We believe that our facilities are adequate for our current operations and are well maintained. Our principal corporate offices are located at 280 Park Avenue, New York, New York; 1055 Washington Boulevard, Stamford, Connecticut; and 525 Okeechobee Boulevard, West Palm Beach, Florida. We also maintain executive offices in London, England; Shanghai, China; and Singapore. Notes 2 and 18 to the consolidated financial statements provide a description of our lease expense, which comprises a significant component of our occupancy and other costs, and our lease commitments.

Item 3. Legal Proceedings

In the ordinary course of business, we are involved in various legal proceedings. We do not expect that such proceedings will have a material adverse effect on our results of operations or financial condition.

Item 4. Mine Safety Disclosures

Not Applicable.

PART II

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

Our common stock is listed and trades on the NYSE under the symbol OMC. As of January 30, 2025, there were 1,717 shareholders of record.

Common stock repurchase activity during the three months ended December 31, 2024 was:

December 1 - December 31, 2024 — — —

During the three months ended December 31, 2024, we withheld 85,005 shares of common stock from employees to satisfy estimated statutory income tax obligations related to the vesting of restricted stock awards and exercises of stock options. The value of the stock withheld was based on the closing price of our common stock on the applicable vesting date.

There were no unregistered sales of equity securities during the three months ended December 31, 2024.

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

(Dollars in tables in millions, except per share amounts.)

EXECUTIVE SUMMARY

Risks and Uncertainties

Global economic disruptions, including geopolitical events, international hostilities, acts of terrorism, public health crises, inflation or stagflation, tariffs and other trade barriers, central bank interest rate policies in countries that comprise our major markets and labor and supply chain challenges could cause economic uncertainty and volatility. The impact of these issues on our business will vary by geographic market and discipline. We monitor economic conditions closely, as well as client revenue levels and other factors. In response to reductions in revenue, we can take actions to align our cost structure with changes in client demand and manage our working capital. However, there can be no assurance as to the effectiveness of our efforts to mitigate any impact of the current and future adverse economic conditions, reductions in client revenue, changes in client creditworthiness and other developments.

Agreement to Acquire IPG

On December 8, 2024, we entered into the Merger Agreement with IPG. Upon closing, each share of IPG common stock will be exchanged for 0.344 shares of Omnicom common stock. The closing of the Merger is subject to the satisfaction of customary closing conditions, including receipt of required regulatory approvals and approval by Omnicom stockholders and IPG stockholders. If completed, the Merger is expected to have a material impact on our business, results of operations and financial condition. For additional information, see Item 1, “Business - Agreement to Acquire IPG.”

Our Business

We are a strategic holding company providing data-inspired, creative marketing and sales solutions to many of the largest global companies. Our portfolio of companies includes our global networks, BBDO, DDB, TBWA, Omnicom Media Group, the DAS Group of Companies, and the Communications Consultancy Network. All of our global networks integrate their service offerings with the Omnicom branded practice areas, including Omnicom Health Group, Omnicom Precision Marketing Group, Omnicom Commerce Group, Omnicom Advertising Collective, Omnicom Public Relations Group, Omnicom Brand Consulting Group, Flywheel Digital and Omnicom Production, a practice area that brings together Omnicom’s global production capabilities, as well as our Experiential businesses and Execution & Support businesses, which includes Omnicom Specialty Marketing Group. In August 2024, we announced the formation of Omnicom Advertising Group, or OAG, a new global organization that aligns the world-class creative networks BBDO, DDB and TBWA, as well as leading agencies within the Omnicom Advertising Collective. OAG began operations in January 2025. InJanuary 2024, we acquired Flywheel Digital, the digital commerce business of Ascential plc, for a net cash purchase price of approximately $845 million.

On a global, pan-regional, and local basis, our networks, practice areas and agencies provide a comprehensive range of services in the following fundamental disciplines: Media & Advertising, Precision Marketing, Public Relations, Healthcare, Branding & Retail Commerce, Experiential, and Execution & Support. Media & Advertising includes creative services across digital and traditional media, strategic media planning and buying, performance media, data analytics services, and Omnicom Production. Precision Marketing includes digital and direct marketing, digital transformation consulting, e-commerce operations, media execution, market intelligence and data and analytics. Public Relations services include corporate communications, crisis

management, public affairs and media and media relations services. Healthcare includes corporate communications and advertising and media services to global healthcare and pharmaceutical companies. Branding & Retail Commerce services include brand and product consulting, strategy and research and retail marketing. Experiential marketing services include live and digital events and experience design and execution. Execution & Support includes field marketing, sales support, digital and physical merchandising, point-of-sale and product placement, as well as other specialized marketing and custom communications services. We operate in all major markets and have a large client base. Our geographic markets include the Americas, which includes North America and Latin America, Europe, EMEA, and Asia-Pacific.

Our business model was built and continues to evolve around our clients. While our networks, practice areas and agencies operate under different names and frame their ideas in different disciplines, we organize our services around our clients. Our fundamental business principle is that our clients’ specific requirements are the central focus of how we structure our service offerings and allocate our resources. This client-centric business model requires that multiple agencies within Omnicom collaborate in formal and informal virtual client networks utilizing our key client matrix organization structure. This collaboration allows us to cut across our internal organizational structures to execute our clients’ marketing requirements in a consistent and comprehensive manner. We use our client-centric approach to grow our business by expanding our service offerings to existing clients, moving into new markets and obtaining new clients. In addition, we pursue selective acquisitions of complementary companies with strong entrepreneurial management teams that could fill gaps in our service delivery to our existing clients.

We believe generative AI will have a significant effect on how we provide services to our clients and how we enhance the productivity of our people. As with any new technology, we are working closely with our clients and technology partners to take advantage of the benefits of AI while being mindful of its limitations, risks, and privacy concerns. We are committed to responsible AI practices and collaboration to harness AI's potential, while evaluating related risks, such as ethical considerations, public perception and reputational concerns, intellectual property protection, regulatory compliance, privacy and data security concerns and our ability to effectively adopt this new emerging technology. The rapidly developing nature of AI technology makes it difficult to assess the full impact on our business at this time.

We operate in all major markets and have a large client base. For the year ended December 31, 2024, our largest client represented 2.7% of revenue, and our 100 largest clients, which represent many of the world's major marketers, represented approximately 54% of revenue. Our clients operate in virtually every sector of the global economy, with no one industry representing more than 17% of our revenue in 2024. Although our revenue is generally balanced between the United States and international markets and we have a large and diverse client base, we are not immune to general economic downturns.

Global economic conditions have a direct impact on our business and financial performance. Adverse global economic conditions pose a risk that our clients may reduce, postpone or cancel spending on marketing and communications services, which would reduce the demand for our services. Revenue is typically lower in the first and third quarters and higher in the second and fourth quarters, reflecting client spending patterns during the year and additional project work that usually occurs in the fourth quarter. Certain global events targeted by major marketers for advertising expenditures, such as the FIFA World Cup and the Olympics, and certain national events, such as the U.S. election process, may affect our revenue year-over-year in certain businesses. Typically, these events do not have a significant impact on our revenue in any period.

Given our size and breadth, we manage our business by monitoring several financial indicators. The key performance indicators that we focus on are revenue growth and variability of operating expenses. We analyze revenue growth by reviewing the components and mix of the growth, including growth by principal regional market, practice area and marketing discipline, the impact from foreign currency exchange rate changes, growth from acquisitions, net of dispositions, and growth from our largest clients. Operating expenses primarily consist of cost of services, selling, general and administrative expenses, or SG&A, and depreciation and amortization, and are analyzed for each network by the chief operating decision maker, who allocates resources accordingly.

Financial Performance

Worldwide revenue in 2024 increased $996.9 million, or 6.8%, to $15.7 billion compared to $14.7 billion in 2023. Worldwide organic growth (defined below) increased revenue $768.7 million, or 5.2%, reflecting increased client spending in our Media & Advertising, Precision Marketing, Experiential and Public Relations disciplines and in all of our major geographic markets compared to the prior year. Our Public Relations discipline was helped by spending on the U.S. elections, and the Experiential discipline benefited from spending on the Summer Olympics. Changes in foreign exchange rates reduced revenue $65.5 million, or 0.4%, and acquisition revenue, net of disposition revenue, increased revenue $293.7 million, or 2.0% (see Note 5 and 14 to the consolidated financial statements).

In North America, organic revenue growth in 2024 compared to the prior year was primarily driven by strong performance in the United States, especially in the Media & Advertising discipline, led by our media business, and our Precision Marketing, Experiential, and Public Relations disciplines. Our Public Relations discipline was helped by spending on the U.S. elections, and the Experiential discipline benefited from spending on the Summer Olympics. The organic growth was partially offset by underperformance in our Branding & Retail Commerce, Execution & Support and Healthcare disciplines. Acquisitions, net of dispositions, positively impacted revenue and were primarily related to the purchase of Flywheel Digital in January 2024 and

acquisitions in the second half of 2023 in our Public Relations discipline, partially offset by dispositions in the Execution & Support discipline in the first half of 2023.

In Latin America, organic revenue growth in 2024 compared to the prior year, increased in all disciplines, led by Media & Advertising, and in all countries in the region. The weakening of most currencies against the U.S. Dollar decreased revenue in 2024, compared to 2023. Acquisitions positively impacted revenue and were primarily related to acquisition activity in our Media & Advertising discipline in the prior year and the purchase of Flywheel Digital in January 2024.

In Asia-Pacific, during 2024, organic revenue increased compared to 2023. Organic growth in our Media & Advertising discipline was partially offset by underperformance in our Precision Marketing and Public Relations disciplines. Substantially all markets in the region, especially China, India, Australia, the Philippines and Thailand, had positive organic revenue growth as compared to the prior year. Foreign currency changes decreased revenue for the year, primarily as a result of the weakening of the Japanese Yen and Chinese Reminbi against the U.S. Dollar. Acquisition activity, including the purchase of Flywheel Digital in January 2024, increased revenue compared to the prior year.

The increases in worldwide revenue across our principal regional markets were: North America $699.2 million, Europe $172.1 million, Asia-Pacific $69.1 million and Latin America $46.9 million.

A summary of our consolidated results of operations year-over-year:

Net Income per Share - Omnicom Group Inc.: Diluted2,3 $ 7.46 $ 6.91 $ 0.55 8.0 %

1) Reconciliation of Non-GAAP Financial Measures on page 30.

2) In 2024, operating expenses included $57.8 million ($42.9 million after-tax) of repositioning costs, primarily related to severance, recorded in the second quarter of 2024 (see Note 13 to the consolidated financial statements). Included in selling, general and administrative expenses in the fourth quarter of 2024 are acquisition transaction costs of $14.6 million ($13.1 million after-tax), related to the proposed merger with IPG (see Note 1 to the consolidated financial statements). The net impact of these items reduced operating income for 2024 by $72.4 million ($56.0 million after-tax) and reduced diluted net income per share - Omnicom Group Inc. by $0.28.

In 2023, operating expenses included real estate operating lease impairment charges, severance and other exit costs of $191.5 million ($145.5 million after-tax) related to repositioning actions we took in the first and second quarters of 2023 to reduce our real estate requirements, rebalance our workforce, and consolidate operations in certain markets. In addition, in the second quarter of 2023, we recorded a gain of $78.8 million ($55.9 million after-tax) on the disposition of certain of our research businesses in the Execution & Support discipline. Included in the fourth quarter of 2023 within selling, general and administrative expenses are acquisition transaction costs of $14.5 million ($13.0 million after-tax), primarily related to the purchase of Flywheel Digital in January 2024 (see Note 5 to the consolidated financial statements). The net impact of these items reduced operating income for 2023 by $127.2 million ($102.6 million after-tax) and reduced diluted net income per share - Omnicom Group Inc. by $0.50 (see Notes 13 and 14 to the consolidated financial statements).

3) Beginning in 2024, EBITA is defined as earnings before interest, income taxes and amortization of acquired intangible assets and internally developed strategic platform assets. As a result, we reclassified the prior year to be consistent with the revised definition, which reduced EBITA from previously reported amounts. We believe EBITA is useful in evaluating the impact of amortization of acquired intangible assets and internally developed strategic platform assets on operating performance and allows for comparability between reporting periods, the after-tax impact on diluted net income per share- Omnicom Group Inc. for 2024 and 2023 was $0.32 and $0.23, respectively.

CRITICAL ACCOUNTING ESTIMATES

The following summary of our critical accounting policies provides a better understanding of our financial statements and the related discussion in this MD&A. We believe that the following policies may involve a higher degree of judgment and complexity in their application than most of our accounting policies and represent the critical accounting policies used in the preparation of our financial statements. Readers are encouraged to consider this summary together with our consolidated financial statements and the related notes, including Note 2, for a more complete understanding of the critical accounting policies discussed below.

Estimates

We prepare our financial statements in conformity with U.S. GAAP and are required to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. We use a fair value approach in testing our intangible assets, which primarily consist of goodwill, for impairment. Actual results could differ from those estimates and assumptions.

Acquisitions and Goodwill

We have made and expect to continue to make selective acquisitions. The evaluation of potential acquisitions is based on various factors, including specialized know-how, reputation, geographic coverage, competitive position and service offerings of the target businesses, as well as our experience and judgment.

Our acquisition strategy is focused on acquiring the expertise of an assembled workforce in order to continue to build upon the core capabilities of our various strategic business platforms and agency brands through the expansion of their geographic reach or their service capabilities to better serve our clients. Additional key factors we consider include the competitive position and specialized know-how of the acquisition targets. Accordingly, as is typical in most service businesses, a substantial portion of the assets we acquire are intangible assets primarily consisting of the know-how of the personnel, which is treated as part of goodwill and is not required to be valued separately under U.S. GAAP. For each acquisition, we undertake a detailed review to identify other intangible assets that are required to be valued separately. A significant portion of the identifiable intangible assets acquired is derived from customer relationships, including the related customer contracts, as well as trade names. In valuing these identified intangible assets, we typically use an income approach and consider comparable market participant measurements.

We evaluate goodwill for impairment at least annually at May 1 and whenever events or circumstances indicate the carrying value may not be recoverable. Under FASB ASC Topic 350, Intangibles - Goodwill and Other, we have the option of either assessing qualitative factors to determine whether it is more-likely-than-not that the carrying value of our reporting units exceeds their respective fair value (Step 0) or proceeding directly to the quantitative goodwill impairment test. While there were no trigger events that required us to perform a quantitative test, we performed the annual quantitative impairment test and compared the fair value of each of our reporting units to its respective carrying value, including goodwill. We identified our regional reporting units as components of our operating segments, which are our six global agency networks. The regional reporting units and practice areas monitor performance and are responsible for the agencies in their region. The regional reporting units report to the segment managers and facilitate the administrative and logistical requirements of our key client matrix organization structure for delivering services to clients in their regions. We have concluded that for each of our operating segments, their regional reporting units have similar economic characteristics and should be aggregated for purposes of testing goodwill for impairment at the operating segment level. Our conclusion was based on a detailed analysis of the aggregation criteria set forth in FASB ASC Topic 280, Segment Reporting, and in FASB ASC Topic 350. Consistent with our fundamental business strategy, the agencies within our regional reporting units serve similar clients in similar industries, and in many cases the same clients. In addition, the agencies within our regional reporting units have similar economic characteristics, and the employees share similar skill sets. The main economic components of each agency are employee compensation and related costs, and direct service costs and occupancy and other costs, which include rent and occupancy costs, technology costs that are generally limited to personal computers, servers and off-the-shelf software and other overhead expenses. Finally, the expected benefits of our acquisitions are typically shared by multiple agencies in various regions as they work together to integrate the acquired business into our virtual client network strategy.

Goodwill Impairment Review - Estimates and Assumptions

We use the following valuation methodologies to determine the fair value of our reporting units: (1) the income approach, which utilizes discounted expected future cash flows, (2) comparative market participant multiples for EBITDA (earnings before interest, taxes, depreciation and amortization) and (3) when available, consideration of recent and similar acquisition transactions.

In applying the income approach, we use estimates to derive the discounted expected cash flows (“DCF”) for each reporting unit that serves as the basis of our valuation. These estimates and assumptions include revenue growth and operating margin, EBITDA, tax rates, capital expenditures, weighted average cost of capital and related discount rates and expected long-term cash flow growth rates. All of these estimates and assumptions are affected by conditions specific to our businesses, economic conditions related to the industry we operate in, as well as conditions in the global economy. The assumptions that have the most significant effect on our valuations derived using a DCF methodology are: (1) the expected long-term growth rate of our reporting units' cash flows and (2) the weighted average cost of capital (“WACC”) for each reporting unit.

The long-term growth rate and WACC assumptions used in our evaluations:

Long-Term Growth Rate 3.5% 3.5%

Long-term growth rate represents our estimate of the long-term growth rate for our industry and the geographic markets we operate in. For the past ten years, the average historical revenue growth rate of our reporting units and the Average Nominal GDP, or NGDP, growth of the countries comprising the major markets that account for substantially all of our revenue, was approximately 3.6% and 4.7%, respectively. We considered this history when determining the long-term growth rates used in our annual impairment test at May 1, 2024. Included in the 10-year history is the full year 2020, which included the negative impact of the COVID-19 pandemic on the global economy and our revenue. We believe marketing expenditures over the long term have a high correlation to NGDP, notwithstanding the volatility of inflationary environments. Based on our past performance, we also believe that our growth rate can exceed NGDP growth in the short-term in the markets we operate in, which are similar across our reporting units. Accordingly, for our annual test as of May 1, 2024, we used an estimated long-term growth rate of 3.5%.

When performing the annual impairment test as of May 1, 2024 and estimating the future cash flows of our reporting units, we considered the current macroeconomic environment, as well as industry and market specific conditions in 2024. In the first half of 2024, our organic revenue increase was 4.6%, which excluded our net disposition activity and the impact from changes in foreign exchange rates.

The WACC is comprised of: (1) a risk-free rate of return, (2) a business risk index ascribed to us and to companies in our industry comparable to our reporting units based on a market derived variable that measures the volatility of the share price of equity securities relative to the volatility of the overall equity market, (3) an equity risk premium that is based on the rate of return on equity of publicly traded companies with business characteristics comparable to our reporting units, and (4) a current after-tax market rate of return on debt of companies with business characteristics similar to our reporting units, each weighted by the relative market value percentages of our equity and debt.

Our six reporting units vary in size with respect to revenue and the amount of debt allocated to them. These differences drive variations in fair value among our reporting units. In addition, these differences as well as differences in book value, including goodwill, cause variations in the amount by which fair value exceeds book value among the reporting units. The goodwill balances and debt vary by reporting unit primarily because our three legacy agency networks were acquired at the formation of Omnicom and were accounted for as a pooling of interests that did not result in any additional debt or goodwill being recorded. The remaining three agency networks were built through a combination of internal growth and acquisitions that were accounted for using the acquisition method and as a result, they have a relatively higher amount of goodwill and debt. Finally, the allocation of goodwill when components are transferred between reporting units is based on relative fair value at the time of transfer.

Goodwill Impairment Review - Conclusion

Based on the results of our impairment test, we concluded that our goodwill as of May 1, 2024 was not impaired, because the fair value of each of our reporting units was in excess of its respective net book value. For our reporting units with negative book value, we concluded that the fair value of their total assets was in excess of book value. The minimum decline in fair value that one of our reporting units would need to experience in order to fail the goodwill impairment test was approximately 48%. Notwithstanding our belief that the assumptions we used for WACC and long-term growth rate in our impairment testing were reasonable, we performed a sensitivity analysis for each reporting unit. The results of this sensitivity analysis on our impairment test as of May 1, 2024 revealed that if the WACC increased by 1% and/or the long-term growth rate decreased by 1%, the fair value of each of our reporting units would continue to be in excess of its respective net book value and would pass the impairment test.

We will continue to perform our impairment test each year at May 1, unless events or circumstances trigger the need for an interim impairment test. There were no events through December 31, 2024 that would change our impairment assessment. The estimates used in our goodwill impairment test do not constitute forecasts or projections of future results of operations, but rather are estimates and assumptions based on historical results and assessments of macroeconomic factors affecting our reporting units as of the valuation date. We believe that our estimates and assumptions are reasonable, but they are subject to change from year-over-year. Actual results of operations and other factors will likely differ from the estimates used in our discounted cash flow valuation, and it is possible that differences could be significant. A change in the estimates we use could result in a decline in the estimated fair value of one or more of our reporting units from the amounts derived as of our latest valuation and could cause us to fail our goodwill impairment test if the estimated fair value for the reporting unit is less than the carrying value of the net assets of the reporting unit, including its goodwill. A large decline in estimated fair value of a reporting unit could result in a non-cash impairment charge and may have an adverse effect on our results of operations and financial position. Additional information about acquisitions and goodwill appears in Notes 2, 5 and 6 to the consolidated financial statements.

Revenue Recognition

Revenue is recognized when a customer obtains control and receives the benefit of the promised goods or services (the performance obligation) in an amount that reflects the consideration we expect to receive in exchange for those goods or services (the transaction price). We measure revenue by estimating the transaction price based on the consideration specified in the client arrangement. Revenue is recognized as the performance obligations are satisfied. Our revenue is primarily derived from the planning and execution of advertising, marketing, and communications services in the following fundamental disciplines: Media & Advertising, Precision Marketing, Public Relations, Healthcare, Branding & Retail Commerce, Experiential, and Execution & Support. Our client contracts are primarily fees for service on a rate per hour or per project basis. Revenue is recorded net of sales, use and value added taxes.

Performance Obligations. In substantially all our disciplines, the performance obligation is to provide advisory and consulting services at an agreed-upon level of effort to accomplish the specified engagement. Our client contracts are comprised of diverse arrangements involving fees based on any one or a combination of the following: an agreed fee or rate per hour for the level of effort expended by our employees; commissions based on the client’s spending for media purchased from third parties; qualitative or quantitative incentive provisions specified in the contract; and reimbursement for third-party costs that we are required to include in revenue when we control the vendor services related to such costs and we act as principal. The transaction price of a contract is allocated to each distinct performance obligation based on its relative stand-alone selling price and is recognized as revenue when, or as, the customer receives the benefit of the performance obligation. Clients typically receive and consume the benefit of our services as they are performed. Substantially all our client contracts provide that we are compensated for services performed to date and allow for cancellation by either party on short notice, typically 90 days, without penalty.

Generally, our short-term contracts, which normally take 30 to 90 days to complete, are performed by a single agency and consist of a single performance obligation. As a result, we do not consider the underlying services as separate or distinct performance obligations because our services are highly interrelated, occur in close proximity, and the integration of the various components of a marketing message is essential to overall service. In certain of our long-term client contracts, which have a term of up to one year, the performance obligation is a stand-ready obligation, because we provide a constant level of similar services over the term of the contract. In other long-term contracts, when our services are not a stand-ready obligation, we consider our services distinct performance obligations and allocate the transaction price to each separate performance obligation based on its stand-alone selling price, including contracts for strategic media planning and buying services, which are considered to be multiple performance obligations, and we allocate the transaction price to each distinct service based on the staffing plan and the stand-alone selling price. In substantially all of our creative services contracts, we have distinct performance obligations for our services, including certain creative services contracts where we act as an agent and arrange, at the client’s direction, for third parties to perform studio production efforts.

Revenue Recognition Methods. A substantial portion of our revenue is recognized over time, as the services are performed, because the client receives and consumes the benefit of our performance throughout the contract period, or we create an asset with no alternative use and are contractually entitled to payment for our performance to date in the event the client terminates the contract for convenience. For these client contracts, other than when we have a stand-ready obligation to perform services, revenue is recognized over time using input measures that correspond to the level of staff effort expended to satisfy the performance obligation on a rate per hour or equivalent basis. For client contracts when we have a stand-ready obligation to perform services on an ongoing basis over the life of the contract, typically for periods up to one year, where the scope of these arrangements is broad and there are no significant gaps in performing the services, we recognize revenue using a time-based measure resulting in a straight-line revenue recognition. From time to time, there may be changes in the client service requirements during the term of a contract and the changes could be significant. These changes are typically negotiated as new contracts covering the additional requirements and the associated costs, as well as additional fees for the incremental work to be performed.

To a lesser extent, for certain other contracts where our performance obligations are satisfied in phases, we recognize revenue over time using certain output measures based on the measurement of the value transferred to the customer, including milestones achieved. Where the transaction price or a portion of the transaction price is derived from commissions based on a percentage of purchased media from third parties, the performance obligation is not satisfied until the media is run and we have an enforceable contract providing a right to payment. Accordingly, revenue for commissions is recognized at a point in time, typically when the media is run, including when it is not subject to cancellation by the client or media vendor.

Principal vs. Agent. In substantially all our businesses, we incur third-party costs on behalf of clients, including direct costs and incidental, or out-of-pocket costs. Third-party direct costs incurred in connection with the creation and delivery of advertising, marketing, and communications services include, among others: purchased media, studio production services, specialized talent, including artists and other freelance labor, event marketing supplies, materials and services, promotional items, market research and third-party data and other related expenditures. Out-of-pocket costs include, among others: transportation, hotel, meals, shipping and telecommunication charges incurred by us in the course of providing our services. Billings related to out-of-pocket costs are included in revenue since we control the goods or services prior to delivery to the client.

However, the inclusion of billings related to third-party direct costs in revenue depends on whether we act as a principal or as an agent in the client arrangement. In most of our businesses, including advertising, which also includes studio production efforts and media planning and buying services, precision marketing, public relations, healthcare, and branding and retail commerce, we act as an agent and arrange, at the client’s direction, for third parties to perform certain services. In these cases, we do not control the goods or services prior to the transfer to the client. As a result, revenue is recorded net of these costs, equal to the amount retained for our fee or commission.

In certain businesses, we may act as principal when contracting for third-party services on behalf of our clients. In our experiential business and most of our execution and support businesses, including field marketing and certain specialty marketing businesses, we act as principal because we control the specified goods or services before they are transferred to the client and we are responsible for providing the specified goods or services, or we are responsible for directing and integrating third-party vendors to fulfill our performance obligation at the agreed upon contractual price. In such arrangements, we also take pricing risk under the terms of the client contract. In certain media buying businesses, we act as principal when we control the buying process for the purchase of the media and contract directly with the media vendor. In these arrangements, we assume the pricing risk under the terms of the client contract. When we act as principal, we include billable amounts related to third-party costs in the transaction price and record revenue over time at the gross amount billed, including out-of-pocket costs, consistent with the manner that we recognize revenue for the underlying services contract. However, in media buying contracts where we act as principal, we recognize revenue at a point in time, typically when the media is run, including when it is not subject to cancellation by the client or media vendor.

Variable Consideration. Someof our client arrangements include variable consideration provisions, which include performance incentives, tiered commission structures and vendor rebates in certain markets outside of the United States. Variable consideration is estimated and included in total consideration at contract inception based on either the expected value method or the most likely outcome method. These estimates are based on historical award experience, anticipated performance and other factors known at the time. Performance incentives are typically recognized in revenue over time. Variable consideration for our media businesses in certain international markets includes rebate revenue and is recognized when it is probable that the media will be run, including when it is not subject to cancellation by the client. In addition, when we receive rebates or credits from vendors for transactions entered into on behalf of clients, they are remitted to the clients in accordance with contractual requirements or retained by us based on the terms of the client contract or local law. Amounts passed on to clients are recorded as a liability and amounts retained by us are recorded as revenue when earned, typically when the media is run.

NEW ACCOUNTING STANDARDS

See Notes 1 and 24 to the consolidated financial statements for information on the adoption of new accounting standards and accounting standards not yet adopted.

CONSOLIDATED RESULTS OF OPERATIONS

The year-over-year change in results of operations:

Operating Expenses:

Charges arising from the effects of the war in Ukraine3 — — 113.4 — (113.4)

Gain on disposition of subsidiary2 — (78.8) — 78.8 (78.8)

Income From Equity Method Investments 6.9 5.2 5.2 1.7 —

Net Income Attributed To Noncontrolling Interests 93.4 81.8 87.3 11.6 (5.5)

Net Income Per Share - Omnicom Group Inc.:

1) Reconciliation of Non-GAAP Financial Measures on page 30.

3) For the year ended December 31, 2022, operating expenses included $113.4 million of charges recorded in the first quarter of 2022, as well as an additional net income tax charge of $4.8 million, related to the disposition of our businesses in Russia, which reduced net income - Omnicom Group Inc. by $118.2 million and diluted net income per share - Omnicom Group Inc. by $0.57 (see Note 15 to the consolidated financial statements).

4) Beginning in 2024, EBITA is defined as earnings before interest, income taxes and amortization of acquired intangible assets and internally developed strategic platform assets. As a result, we reclassified the prior year to be consistent with the revised definition, which reduced EBITA from previously reported amounts. We believe EBITA is useful in evaluating the impact of amortization of acquired intangible assets

and internally developed strategic platform assets on operating performance and allows for comparability between reporting periods. The after-tax impact on diluted net income per share- Omnicom Group Inc. for 2024, 2023 and 2022 was $0.32, $0.23 and $0.21, respectively.

Revenue

The components of year-over-year revenue change in the United States (“Domestic”) and the remainder of the world (“International”):

Total Domestic International

$ % $ % $ %

Components of revenue change:

Foreign exchange rate impact (65.5) (0.4) % — — % (65.5) (0.9) %

Total Domestic International

$ % $ % $ %

Components of revenue change:

Foreign exchange rate impact (28.3) (0.2) % — — % (28.3) (0.4) %

The components and percentages are calculated as follows:

•Foreign exchange rate impact is calculated by translating the current period’s local currency revenue using the prior period average exchange rates to derive current period constant currency revenue (in this case $15,754.6 million and $14,720.5 million for the Total column for December 31, 2024 and December 31, 2023, respectively). The foreign exchange impact is the difference between the current period revenue in U.S. Dollars and the current period constant currency revenue ($15,689.1 million less $15,754.6 million and $14,692.2 million less $14,720.5 million for the Total column for December 31, 2024 and December 31, 2023, respectively).

•Acquisition revenue is calculated as if the acquisition occurred twelve months prior to the acquisition date by aggregating the comparable prior period revenue of acquisitions through the acquisition date. As a result, acquisition revenue excludes the positive or negative difference between our current period revenue subsequent to the acquisition date and the comparable prior period revenue and the positive or negative growth after the acquisition is attributed to organic growth. Disposition revenue is calculated as if the disposition occurred twelve months prior to the disposition date by aggregating the comparable prior period revenue of dispositions through the disposition date. The acquisition revenue and disposition revenue amounts are netted in the table.

•Organic growth is calculated by subtracting the foreign exchange rate impact, and the acquisition revenue, net of disposition revenue components from total revenue growth.

•The percentage change is calculated by dividing the individual component amount by the prior period revenue base of that component ($14,692.2 million and $14,289.1 million for the Total column for December 31, 2024, and December 31, 2023, respectively).

Changes in the value of foreign currencies against the U.S. Dollar affect our results of operations and financial condition. For the most part, because the revenue and expense of our foreign operations are both denominated in the same local currency, the economic impact on operating margin is minimized. Assuming exchange rates at January 30, 2025, remain unchanged, we expect the impact of changes in foreign exchange rates to reduce revenue between 2.0% to 2.5% for the first quarter of 2025 and by 2.0% for the full year. Based on our acquisition and disposition activity to date, excluding the proposed merger with IPG, we expect that the net impact will be flat for the first quarter and for the full year of 2025.

In the normal course of business, our agencies both gain and lose business from clients each year due to a variety of factors. Under our client-centric approach, we seek to broaden our relationships with all of our clients. Our largest client represented approximately 2.7% and 3.0% of revenue for 2024 and 2023, respectively. Our ten largest and 100 largest clients represented approximately 19.1% and 54.4% of revenue for 2024, respectively, and 20.2% and 54.5% of revenue for 2023, respectively.

Revenue by Discipline

To monitor the changing needs of our clients and to further expand the scope of our services to key clients, we monitor revenue across a broad range of disciplines and group them into the following categories: Media & Advertising, Precision Marketing, Public Relations, Healthcare, Branding & Retail Commerce, Experiential and Execution & Support,

The year-over-year change in revenue and organic growth by discipline:

Year Ended December 31,

$ % ofRevenue $ % ofRevenue $ Change % Organic Growth

Year Ended December 31,

$ % ofRevenue $ % ofRevenue $ Change % Organic Growth

Effective January 1, 2023, we realigned the classification of certain services primarily within our Commerce & Branding, Execution & Support, and Experiential disciplines, and prior year amounts have been reclassified.

2024 v. 2023

The year-over-year changes in worldwide revenue in 2024, compared to 2023, in our fundamental disciplines were: Media & Advertising increased $575.0 million, Precision Marketing increased $347.4 million, Public Relations increased $100.3 million, Healthcare decreased $8.0 million, Branding & Retail Commerce decreased $60.8 million, Experiential increased $80.1 million, and Execution & Support decreased $37.1 million. Worldwide organic revenue growth increased revenue $768.7 million, or 5.2%, primarily reflecting increased client spending in Media & Advertising, led by Media, as well as Precision Marketing, Public Relations and Experiential disciplines compared to the prior year. Our Public Relations discipline was helped by spending on the U.S. elections, and the Experiential discipline benefited from spending on the Summer Olympics. Organic growth was partially offset by underperformance in our Branding & Retail Commerce discipline. Changes in foreign exchange rates reduced revenue slightly. The decrease in revenue from foreign exchange translation was primarily related to the weakening of some currencies, including the Japanese Yen and Brazilian Real against the U.S. Dollar, partially offset by the strengthening of the British Pound, Colombian Peso and Euro against the U.S. Dollar. Acquisition revenue, net of dispositions, increased revenue $293.7 million, or 2.0% (see Notes 5 and 14 to the consolidated financial statements).

2023 v. 2022

The year-over-year changes in worldwide revenue in 2023, compared to 2022, in our fundamental disciplines were: Media & Advertising increased $457.3 million, Precision Marketing increased $46.9 million, Public Relations increased $26.2 million, Healthcare increased $40.4 million, Branding & Retail Commerce increased $5.6 million, Experiential increased $15.8 million, and Execution & Support decreased $189.1 million. Organic revenue increased across substantially all disciplines, except for Public Relations, which faced a difficult comparison to the prior year, and Execution & Support. The impact of foreign exchange translation slightly reduced our revenue. The decrease in revenue from foreign exchange translation was primarily related to the weakening of several currencies against the U.S. Dollar, including the Australian Dollar, Canadian Dollar, Japanese Yen, and

Chinese Renminbi, partially offset by the Euro and British Pound, which strengthened against the U.S. Dollar compared to the prior year. The negative impact on revenue from acquisitions, net of dispositions, year-over-year was primarily due to dispositions in the Execution & Support discipline in the first and second quarters of 2023, including the sale of our research businesses, as well as the disposition of our businesses in Russia in the first quarter of 2022, partially offset by acquisitions in our Media & Advertising and Public Relations disciplines in 2023.

Revenue by Geography

The year-over-year change in revenue and organic growth in our geographic markets:

Year Ended December 31,

$ % ofRevenue $ % ofRevenue $ Change % Organic Growth

Americas:

EMEA:

Year Ended December 31,

$ % ofRevenue $ % ofRevenue $ Change % Organic Growth

Americas:

EMEA:

The year-over-year increase in worldwide revenue across our geographic markets for 2024 were: North America $699.2 million, or 8.8%, Latin America $46.9 million, or 12.1%, Europe $172.1 million, or 4.0%, the Middle East and Africa $9.6 million, or 3.1%, and Asia-Pacific $69.1 million, or 3.9%.

The year-over-year change in worldwide revenue across our geographic markets for 2023 was: North America increased $95.0 million, or 1.2%, Latin America increased $57.8 million, or 17.6%, Europe increased $256.4 million, or 6.4%, the Middle East and Africa decreased $37.1 million, or 10.7%, and Asia-Pacific increased $31.0 million, or 1.8%.

North America

2024 vs. 2023

2023 vs. 2022

In 2023, North America’s organic revenue growth was driven primarily by the performance in the United States, especially in the Media & Advertising discipline, led by our media business, and our Precision Marketing, and Healthcare disciplines, partially offset by negative performance in our Experiential and Branding & Retail Commerce disciplines, which faced difficult comparisons to the prior year, and our Execution & Support discipline. Acquisitions, net of dispositions, negatively impacted revenue, primarily as a result of dispositions in the Execution & Support discipline in the first and second quarters of 2023, including the sale of our research businesses, partially offset by acquisitions during the year in the Media & Advertising, Precision Marketing, and Public Relations disciplines.

Latin America

2024 vs. 2023

2033 vs. 2022

In Latin America, organic revenue growth in 2023 increased in all our disciplines, led by our Media & Advertising discipline, and in substantially all countries in the region. The strengthening of most currencies, especially the Mexican Peso and Brazilian Real, partially offset by the weakening of the Argentine Peso against the U.S. Dollar, increased revenue in 2023 compared to 2022.

EMEA

Europe

2024 vs. 2023

In Europe, organic revenue growth in 2024 compared to the prior year was driven by strong performance in our Media & Advertising discipline, led by our media business, and in our Experiential and Execution & Support disciplines, partially offset by underperformance in our Precision Marketing, Branding & Retail Commerce and Public Relations disciplines. Foreign currency exchange rate changes increased revenue year-over-year, primarily as a result of the strengthening of the British Pound, partially offset by the weakening of several currencies against the U.S. Dollar year-over-year. Acquisitions, net of dispositions for 2024, positively impacted revenue and were primarily related to the purchase of Flywheel Digital in January 2024 and acquisition activity in our Media & Advertising discipline in the second half of 2023, partially offset by dispositions in the Execution & Support discipline in the first half of 2023. In 2024, total revenue in the U.K. increased 7.1% to $1,700.5 million. Organic revenue growth year-over-year in the U.K. was 2.7%, with growth led by our media business in our Media & Advertising discipline and our Experiential and Execution & Support disciples, partially offset by negative performance in our Precision Marketing, Branding & Retail Commerce, and Public Relations disciplines. In Continental Europe, which includes the Euro Zone and the other European countries, organic growth year-over-year of 2.8% was across substantially all disciplines, led by Turkey, Spain, Germany and Netherlands, and was partially offset by weakness in France and Italy.

2023 vs. 2022

In Europe for 2023 compared to 2022, organic revenue increased across most countries in our major markets and in substantially all disciplines, especially our Media & Advertising discipline, led by our media business, and our Experiential discipline, partially offset by a decrease in our Public Relations discipline. Foreign currency changes increased revenue in 2023, primarily as a result of the strengthening of the Euro and British Pound against the U.S. Dollar year-over-year. Acquisition revenue, net of disposition revenue, reduced revenue compared to the prior year, primarily due to the disposition of our businesses in Russia in the first quarter of 2022 and the disposition of certain businesses, primarily our research businesses in the Execution & Support discipline in the second quarter of 2023. In 2023, total revenue in the U.K. increased 4.0% to $1,587.3 million. Organic revenue growth year-over-year in the U.K. was 4.7%, with growth across most disciplines, led by our media business in our Media & Advertising discipline, partially offset by negative performance in our Precision Marketing and Public Relations disciplines. In Continental Europe, which includes the Euro Zone and the other European countries, organic growth year-over-year of 7.2% was led by Italy, France, and Germany across substantially all disciplines.

Middle East and Africa 2024 vs. 2023 vs. 2022

In the Middle East and Africa for 2024, organic revenue increased compared to 2023, primarily as a result of our Media & Advertising and Experiential disciplines. For 2024, the strengthening of certain currencies in the region against the U.S. Dollar decreased revenue year-over-year. For 2023, organic revenue decreased compared to 2022, primarily as a result of our Experiential discipline, which faced difficult comparisons in the region, partially offset by our Media & Advertising discipline. In 2023 as compared to 2022, the weakening of certain currencies in the region against the U.S. Dollar also decreased revenue year-over-year.

Asia-Pacific

2024 vs. 2023

2023 vs 2022

Organic revenue for Asia-Pacific in 2023 increased compared to 2022 across most major markets in the region, especially China, India, Australia, and Japan, and was led by our media business in our Media & Advertising discipline and our Experiential discipline. The organic revenue growth was partially offset by the weakening of certain currencies in the region against the U.S. Dollar, especially the Australian Dollar, Japanese Yen and Chinese Renminbi.

Revenue by Industry

Revenue by industry sector:

Year Ended December 31,

Pharmaceuticals and Healthcare 16 % 16 % 16 %

Food and Beverage 15 % 15 % 15 %

Consumer Products 10 % 8 % 8 %

Technology 8 % 8 % 8 %

Financial Services 7 % 8 % 8 %

Travel and Entertainment 7 % 7 % 6 %

Retail 6 % 6 % 6 %

Telecommunications 3 % 4 % 4 %

Government 4 % 4 % 4 %

Services 3 % 2 % 3 %

Oil, Gas and Utilities 2 % 2 % 2 %

Not-for-Profit 1 % 1 % 1 %

Education 1 % 1 % 1 %

Other 5 % 6 % 6 %

Operating Expenses

The year-over-year change in operating expenses:

Year Ended December 31,

$ % ofRevenue $ % ofRevenue $Change %Change

Operating Expenses:

Salary and service costs:

Gain on disposition of subsidiary — — % (78.8) (0.5) % 78.8

Year Ended December 31,

$ % ofRevenue $ % ofRevenue $Change %Change

Operating Expenses:

Salary and service costs:

Real estate and other repositioning costs 191.5 1.3 % — — % 191.5 — %

Charges arising from the effects of the war in Ukraine — — % 113.4 0.8 % (113.4)

Gain on disposition of subsidiary (78.8) (0.5) % — — % (78.8)

We measure cost of services in two distinct categories: salary and service costs and occupancy and other costs. As a service business, salary and service costs make up the significant portion of our operating expenses and substantially all these costs comprise the essential components directly linked to the delivery of our services. Salary and service costs include employee compensation and benefits, freelance labor, third-party service costs, and third-party incidental costs. Third-party service costs include vendor costs when we act as principal in providing services to our clients. Third-party incidental costs that are required to be included in revenue primarily consist of client-related travel and incidental out-of-pocket costs that are billed back to the client directly at our cost. Occupancy and other costs consist of the indirect costs related to the delivery of our services, including office rent and other occupancy costs, equipment rent, technology costs, general office expenses and other expenses. Adverse and beneficial fluctuations in foreign currencies from year-over-year impact our results of operations and financial condition when we translate our financial statements from local foreign currencies to the U.S. Dollar. However, substantially all of our foreign operations transact business in their local currency, mitigating the impact of changes in foreign currency exchange rates on our

operating margin percentage. As a result, the changes in our operating expenses year-over-year from foreign currency translation were in line with the percentage impact from changes in foreign currencies on revenue for the year ended December 31, 2024.

2024 vs. 2023

Operating expenses in 2024 increased $827.0 million, or 6.6%, to $13,414.5 million from $12,587.5 million, compared to the prior year, primarily as a result of organic growth and the acquisition of Flywheel in the first quarter of 2024 (see Note 5 to the consolidated financial statements). Operating expenses for 2024 include the impact of repositioning costs, primarily related to severance, recorded in the second quarter of 2024 for $57.8 million in connection with our strategic initiatives to increase efficiencies in our international operations and the start of the consolidation of our production services (see Note 13 to the consolidated financial statements). Included in selling, general and administrative expenses in the fourth quarter of 2024 are acquisition transaction costs of $14.6 million ($13.1 million after-tax) related to the proposed merger with IPG (see Note 1 to the consolidated financial statements).

2023 vs. 2022

Operating expenses in 2023 increased $381.7 million, or 3.1%, to $12,587.5 million from $12,205.8 million. Operating expenses for 2023 reflect the net impact of the gain on disposition of certain research businesses in our Execution & Support discipline of $78.8 million, repositioning costs related to real estate and other exit charges and severance costs of $191.5 million (see Notes 13 and 14 to the consolidated financial statements) and acquisition transaction costs of $14.5 million, primarily related to the Flywheel Digital acquisition that closed in January 2024.

Operating Expenses - Salary and Service Costs

Salary and service costs, which tend to fluctuate with changes in revenue, are comprised of salary and related costs, third-party service costs, and third-party incidental costs.

2024 vs. 2023

Salary and service costs for 2024 increased $731.3 million, or 6.8%, to $11,432.5 million, compared to the prior year. Salary and related costs for 2024 increased $228.6 million, or 3.2%, to $7,441.4 million, primarily as a result of our acquisition of Flywheel Digital. These costs decreased as a percentage of revenue, primarily due to the reduction in headcount arising from our ongoing repositioning actions and changes in our global employee mix. Third-party service costs for 2024 increased $430.7 million, or 14.8%, to $3,348.6 million, primarily as a result of organic growth in our Media & Advertising and Experiential disciplines. Third-party incidental costs for 2024 increased $72.0 million, or 12.6%, to $642.5 million.

2023 vs. 2022

Salary and service costs in 2023 compared to the prior year period increased $375.3 million, or 3.6% to $10,701.2 million. Salary and related costs for 2023 increased $14.9 million, or 0.2%, to $7,212.8 million, primarily due to an increase in headcount. Headcount increased in 2023 as a result of organic growth and our acquisition activity; the increase was partially offset by the dispositions in our Execution & Support discipline in the first and second quarters of 2023. Third-party service costs for 2023 increased $332.4 million, or 12.9%, to $2,917.9 million due to changes in the mix of our businesses year-over-year, and were less impacted by the effects of our disposition activity during the year. Third-party incidental costs for 2023 increased $28.0 million, or 5.2%, to $570.5 million.

Operating Expenses - Occupancy and Other Costs

Occupancy and other costs are less directly linked to changes in revenue than salary and service costs.

2024 vs. 2023

Occupancy and other costs for 2024, increased by $105.6 million, or 9.0%, year-over-year to $1,274.4 million, primarily resulting from acquisition activity. Increased office and other related costs were partially offset by lower rent expense in the year.

2023 vs. 2022

Occupancy and other costs for 2023, increased slightly by $0.2 million year-over-year. Lower rent expense was partially offset by an increase in office and other related costs in the year. In connection with the transition to a flexible working environment, a hybrid model which allows for partial remote work, we took certain actions in the first quarter of 2023 to reduce and reposition our office lease portfolio and recorded a charge of $119.2 million, which included an $80.4 million non-cash impairment charge for operating lease right-of-use, or ROU, assets, $20.0 million for the write-off of the net book value of leasehold improvements at the affected locations, and $18.8 million of other lease obligations. Substantially all of the operating lease payments related to the ROU assets will be paid out through December 31, 2026 (see Note 13 to the consolidated financial statements).

Operating Expenses - Selling, General & Administrative Expenses

SG&A expenses primarily consist of third-party marketing costs, professional fees, and compensation and benefits and occupancy and other costs of our corporate and executive offices, including group-wide finance and accounting, treasury, legal and governance, human resource oversight and similar costs.

2024 vs. 2023

SG&A expenses for 2024 increased $14.4 million compared to 2023, primarily due to professional fees related to our strategic initiatives. Included in selling, general and administrative expenses in the fourth quarter of 2024 are acquisition transaction costs of $14.6 million ($13.1 million after-tax) related to the proposed merger with IPG (see Note 1 to the consolidated financial statements).

2023 vs. 2022

SG&A expenses for 2023 increased $15.2 million compared to 2022, primarily as a result of higher professional fees in connection with our acquisition activity during the year, and acquisition transaction costs of $14.5 million ($13.0 million after-tax), primarily related to the Flywheel Digital acquisition that closed in January 2024.

Operating Income

2024 vs. 2023

Operating income for 2024 increased $169.9 million, or 8.1%, to $2,274.6 million, compared to 2023, and operating margin increased to 14.5% from 14.3%. EBITA increased $195.6 million to $2,362.1 million, and EBITA margin increased to 15.1% from 14.7%. The net effect of repositioning actions, primarily related to severance, recorded in the second quarter of 2024 and acquisition transaction costs recorded in the fourth quarter of 2024 (see Note 13 to the consolidated financial statements) reduced both operating income and EBITA by $72.4 million, and reduced both operating margin by 0.5% and EBITA margin by 0.4%. The net effect of the real estate and other repositioning costs, the gain on disposition of subsidiaries (see Notes 13 and 14 to the consolidated financial statements) and acquisition costs, reduced both operating income and EBITA by $127.2 million, and reduced both operating margin and EBITA margin by 0.9% in 2023.

2023 vs. 2022

Operating income for 2023 compared to 2022, increased $21.4 million to $2,104.7 million and operating margin decreased to 14.3% from 14.6%. EBITA decreased $24.4 million to $2,166.5 million and EBITA margin decreased to 14.7% from 15.0%. The net effect of the real estate and other repositioning costs, the gain on disposition of subsidiaries (see Notes 13 and 14 to the consolidated financial statements) and acquisition costs, reduced both operating income and EBITA by $127.2 million, and reduced both operating margin and EBITA margin by 0.9%. Operating income and EBITA in 2022 included a reduction of $113.4 million related to charges arising from the war in Ukraine, which decreased both operating margin and EBITA margin by 0.8%.

Net Interest Expense

2024 vs. 2023

Net interest expense in 2024 increased $35.2 million year-over-year to $147.0 million. Interest expense on debt increased by $31.2 million year-over-year, primarily related to the issuance in the first quarter of 2024 of €600 million 3.70% Senior Notes due 2032, or 2032 Notes, and the issuance in the third quarter of 2024 of $600 million 5.30% Senior Notes due 2034, or 2034 Notes. The net proceeds from the issuance of the 2032 Notes were used for general corporate purposes, including working capital expenditures, acquisitions and repurchases of our common stock. The net proceeds from the issuance of the 2034 Notes, along with available cash, were used to fund the repayment of our $750 million 3.65% Senior Notes on November 1, 2024 (see Note 7 to the consolidated financial statements). Interest income in 2024 decreased $5.8 million year-over-year to $100.9 million, primarily as a result of lower cash balances in the first half of the year due to the timing of our financing and acquisition activity, including the purchase of Flywheel in the first quarter of 2024.

2023 vs. 2022

Net interest expense in 2023 decreased $26.1 million year-over-year to $111.8 million. Interest expense increased by $9.9 million year-over-year, primarily related to non-cash interest charges on pension and other postemployment benefits (see Note 12 to the consolidated financial statements). Interest income in 2023 increased $36.0 million year-over-year to 106.7 million, primarily as a result of higher average cash balances.

Income Taxes

2024 vs. 2023

Our effective tax rate for 2024 remained flat year-over-year at 26.3%. The effective tax rate for 2024 was favorably impacted by the windfall tax benefit on share-based compensation. The effective tax rate for 2023 includes an increase of approximately $10.7 million in income tax expense related to a lower tax benefit in certain jurisdictions for the real estate and other repositioning costs in the period and an increase in the U.K. statutory tax rate, partially offset by approximately $10.0 million of favorable impacts from the resolution of certain non-U.S. tax positions.

2023 vs. 2022

Our effective tax rate for 2023 decreased year-over-year to 26.3% from 28.1%. The higher effective tax rate for 2022 was predominantly the result of the non-deductibility of the $113.4 million charge recorded in the first quarter of 2022, arising from the effects of the war in Ukraine.

Numerous foreign jurisdictions have enacted or are in the process of enacting legislation to adopt a minimum effective tax rate described in the Global Anti-Base Erosion, or Pillar Two, model rules issued by the Organization for Economic Co-operation and Development. A minimum effective tax rate of 15% would apply to multinational companies with consolidated revenue above €750 million.

Under the Pillar Two rules, a company would be required to determine a combined effective tax rate for all entities located in a jurisdiction. If the jurisdictional effective tax rate determined under the Pillar Two is less than 15%, a top-up tax will be due to bring the jurisdictional effective tax rate up to 15%. We are continuing to monitor the pending implementation of Pillar Two by individual countries and the potential effects of Pillar Two on our business. The provisions effective in 2024 did not have a materially adverse impact on our results of operations, financial condition or cash flows.

Net Income and Net Income Per Share - Omnicom Group, Inc.

2024 vs. 2023

Net income - Omnicom Group Inc. in 2024 increased $89.2 million to $1,480.6 million from $1,391.4 million. The year-over-year increase is due to the factors described above. Diluted net income per share - Omnicom Group Inc. increased to $7.46 in 2024, from $6.91 in 2023, due to the factors described above and the impact of the reduction in our weighted average common shares outstanding resulting from the repurchases of our common stock, net of shares issued for restricted stock awards, stock option exercises and the employee stock purchase plan during the year. For 2024, the net impact of the real estate and other repositioning costs, primarily related to severance, recorded in the second quarter of 2024 (see Note 13 to the consolidated financial statements) and acquisition transaction costs, recorded in the fourth quarter of 2024 reduced net income - Omnicom Group Inc. by $56.0 million and diluted net income per share - Omnicom Group Inc. by $0.28.

2023 vs. 2022

Net income - Omnicom Group Inc. in 2023 increased $74.9 million to $1,391.4 million from $1,316.5 million. The year-over-year increase is due to the factors described above. Diluted net income per share - Omnicom Group Inc. decreased to $6.91 in 2023, compared to $6.36 in 2022, due to the factors described above and the impact of the reduction in our weighted average common shares outstanding resulting from repurchases of our common stock, net of shares issued for restricted stock awards, stock option exercises and the employee stock purchase plan during the year. For 2023, the net impact of the real estate and other repositioning costs (see Note 13 to the consolidated financial statements), gain on disposition of subsidiaries (see Note 14 to the consolidated financial statements) and acquisition transaction costs reduced net income - Omnicom Group Inc. by $102.6 million and diluted net income per share - Omnicom Group Inc. by $0.50.

NON-GAAP FINANCIAL MEASURES

We use certain non-GAAP financial measures in describing our performance. We use EBITA and EBITA Margin as additional operating performance measures, which exclude from operating income the non-cash amortization expense of acquired intangible assets and internally developed strategic platform assets. We believe EBITA and EBITA Margin are useful measures for investors to evaluate the performance of our business and allow for comparability between the periods presented. Non-GAAP financial measures should not be considered in isolation from, or as a substitute for, financial information presented in compliance with U.S. GAAP. Non-GAAP financial measures reported by us may not be comparable to similarly titled amounts reported by other companies.

Reconciliation of Non-GAAP Financial Measures

The following table reconciles the U.S. GAAP financial measure of Net Income - Omnicom Group Inc. to EBITA and EBITA Margin:

Year Ended December 31,

Net Income Attributed To Noncontrolling Interests 93.4 81.8 87.3

Income From Equity Method Investments 6.9 5.2 5.2

LIQUIDITY AND CAPITAL RESOURCES

Cash Sources and Requirements

The primary sources of our short-term liquidity are net cash provided by operating activities and cash and cash equivalents. Additional liquidity sources include our $2.5 billion unsecured multi-currency revolving credit facility, or Credit Facility, terminating on June 2, 2028, the ability to issue up to $2 billion of U.S. Dollar denominated commercial paper and issue up to the equivalent of $500 million in British Pounds or Euro under a Euro commercial paper program, and access to the capital markets. In addition, certain of our international subsidiaries have uncommitted credit lines that are guaranteed by Omnicom aggregating $517.4 million. Our liquidity sources fund our non-discretionary cash requirements and our discretionary spending. Our $600 million Delayed Draw Term Loan Agreement automatically terminated on July 15, 2024.

Working capital, which we define as current assets minus current liabilities, is our principal non-discretionary funding requirement. Our working capital cycle typically peaks during the second quarter of the year due to the timing of payments for incentive compensation, income taxes and contingent purchase price obligations. In addition, we have contractual obligations related to our long-term debt (principal and interest payments), recurring business operations, primarily related to lease obligations, and acquisition related obligations. Our principal discretionary cash spending includes dividend payments to common shareholders, capital expenditures, strategic acquisitions and repurchases of our common stock.

Cash and cash equivalents decreased $92.6 million from December 31, 2023. The decrease was composed of:

Sources

Net cash provided by operating activities - as reported $ 1,733.5

Add back: Decrease in operating capital 231.2

Principal cash sources $ 1,964.7

Uses

Capital expenditures $ (140.6)

Dividends paid to common shareholders (552.7)

Dividends paid to noncontrolling interest shareholders (85.4)

Repurchases of common stock, net of proceeds from stock plans (268.6)

Principal cash uses $ (2,045.4)

Principal cash uses in excess of principal cash sources $ (80.7)

Effect of foreign exchange rate changes on cash and cash equivalents (185.4)

Other net financing and investing activities 404.7

Decrease in operating capital (231.2)

Decrease in cash and cash equivalents - as reported $ (92.6)

Principal cash sources and principal cash uses are Non-GAAP liquidity measures. These amounts exclude changes in operating capital and other investing and financing activities. This presentation reflects the metrics used by us to assess our sources and uses of cash and was derived from our consolidated statement of cash flows. We believe that this presentation is meaningful to understand the primary sources and uses of our cash flow and the effect on our cash and cash equivalents. Non-GAAP liquidity measures should not be considered in isolation from, or as a substitute for, financial information presented in compliance with U.S. GAAP. Non-GAAP liquidity measures as reported by us may not be comparable to similarly titled amounts reported by other companies. Additional information regarding our cash flows can be found in our consolidated statement of cash flows and Note 16 to the consolidated financial statements.

At December 31, 2024, we have the following contractual obligations:

•The aggregate principal amount of long-term debt is $6.1 billion and matures at various dates from 2026 through 2034. Future interest payments on the debt total $1.0 billion, of which $186.6 million is payable in 2025.

•The liability for operating and finance lease payments is $1,414.9 million, of which $294.2 million is due in 2025.

•The obligation for the defined benefit pension plans is $216.0 million, and the liability for the postemployment arrangements is $126.6 million. In 2024, we contributed $10.6 million to the defined benefit plans and paid $11.4 million for the postemployment arrangements. We do not expect these payments to increase significantly in 2025.

•The liability for contingent purchase price payments (earn-outs) is $220.1 million, of which $56.0 million is payable in 2025.

•The remaining balance for the transition tax on accumulated foreign earnings imposed by the Tax Cut and Jobs Act of 2017 is $41.3 million, of which $34.9 million is payable in 2025.

Based on past performance and current expectations, we believe that net cash provided by operating activities and cash and cash equivalents will be sufficient to meet our non-discretionary cash requirements for the next twelve months. In addition, and over the longer term, our Credit Facility is available to fund our working capital and contractual obligations.

Cash Management

Our regional treasury centers in North America, Europe and Asia manage our cash and liquidity. Each day, operations with excess funds invest those funds with their regional treasury center. Likewise, operations that require funds borrow from their regional treasury center. Treasury centers with excess cash invest on a short-term basis with third parties, with maturities generally ranging from overnight to 90 days. Certain treasury centers have notional pooling arrangements that are used to manage their cash and set-off foreign exchange imbalances. The arrangements require each treasury center to have its own notional pool account and to maintain a notional positive account balance. Additionally, under the terms of the arrangement, set-off of foreign exchange positions are limited to the long and short positions within their own account. To the extent that our treasury centers require liquidity, they can issue up to a total of $2 billion of U.S. Dollar-denominated commercial paper, issue up to the equivalent of $500 million in British Pounds or Euro under a Euro commercial paper program, or borrow under the Credit Facility or the uncommitted credit lines. This process enables us to manage our debt more efficiently and utilize our cash more effectively, as well as manage our risk to foreign exchange rate imbalances. In countries where we either do not conduct treasury operations or it is not feasible for one of our treasury centers to fund net borrowing requirements on an intercompany basis, we arrange for local currency uncommitted credit lines. We have a policy governing counterparty credit risk with financial institutions that hold our cash and cash equivalents, and we have deposit limits for each institution. In countries where we conduct treasury operations, generally the counterparties are either branches or subsidiaries of institutions that are party to the Credit Facility. These institutions generally have credit ratings better than or equal to our credit ratings. In countries where we do not conduct treasury operations, all cash and cash equivalents are held by counterparties that meet specific minimum credit standards.

At December 31, 2024, our foreign subsidiaries held approximately $2.0 billion of our total cash and cash equivalents of $4.3 billion. Substantially all of the cash is available to us, net of any foreign withholding taxes payable upon repatriation to the United States.

As of December 31, 2024, our net debt position, which we define as total debt, including short-term debt, less cash and cash equivalents increased $498.7 million to $1.7 billion from December 31, 2023. The increase in net debt primarily resulted from our discretionary spending of $2.0 billion, primarily related to our acquisition and other financing activities. This increase was substantially offset by the increase in cash from the net cash provided by operating activities of $1.7 billion. In addition, the net effect of foreign exchange rate changes on cash and cash equivalents and on our foreign currency denominated debt increased net debt by $114 million.

Net debt:

December 31,

Long-term debt, including current portion 6,035.3 5,639.6

Net debt is a Non-GAAP liquidity measure. This presentation, together with the comparable U.S. GAAP liquidity measures, reflects one of the key metrics used by us to assess our cash management. Non-GAAP liquidity measures should not be considered in isolation from, or as a substitute for, financial information presented in compliance with U.S. GAAP. Non-GAAP liquidity measures as reported by us may not be comparable to similarly titled amounts reported by other companies.

Debt Instruments and Related Covenants

On August 2, 2024, Omnicom issued $600 million 5.30% Senior Notes due 2034. The net proceeds from the issuance, after deducting the underwriting discount and offering expenses, were $592.4 million. The net proceeds from the issuance, along with available cash, were used to fund the repayment of our $750 million 3.65% Senior Notes on November 1, 2024.

On March 6, 2024, Omnicom Finance Holdings plc, or OFH, a U.K.-based wholly owned subsidiary of Omnicom, issued €600 million 3.70% Senior Notes due 2032. The net proceeds from the issuance, after deducting the underwriting discount and offering expenses, were $643.1 million and were used for general corporate purposes, including working capital expenditures, acquisitions and repurchases of our common stock.

Our 2.45% Senior Notes due 2030, 4.20% Senior Notes due 2030, 2.60% Senior Notes due 2031 and 5.30% Senior Notes due 2034 are senior unsecured obligations of Omnicom that rank equal in right of payment with all existing and future unsecured senior indebtedness.

Omnicom and its wholly owned finance subsidiary, Omnicom Capital Inc., or OCI, are co-obligors under the 3.60% Senior Notes due 2026. These notes are a joint and several liability of Omnicom and OCI, and Omnicom unconditionally guarantees OCI’s obligations with respect to the notes. OCI provides funding for our operations by incurring debt and lending the proceeds to our operating subsidiaries. OCI’s assets primarily consist of cash and cash equivalents and intercompany loans made to our operating subsidiaries, and the related interest receivable. There are no restrictions on the ability of OCI or Omnicom to obtain funds from our subsidiaries through dividends, loans or advances. Such notes are senior unsecured obligations that rank equal in right of payment with all existing and future unsecured senior indebtedness.

Omnicom and OCI have, jointly and severally, fully and unconditionally guaranteed the obligations of OFH with respect to the €500 million 0.80% Senior Notes due 2027 and the €500 million 1.40% Senior Notes due 2031, and Omnicom has fully and unconditionally guaranteed the obligations of OFH with respect the €600 million 3.70% Senior Notes due 2032, collectively the Euro Notes. OFH’s assets consist of its investments in several wholly owned finance companies that function as treasury centers, providing funding for various operating companies in Europe, Australia and other countries in the Asia-Pacific region. The finance companies’ assets consist of cash and cash equivalents and intercompany loans that they make or have made to the operating companies in their respective regions and the related interest receivable. There are no restrictions on the ability of Omnicom, OCI or OFH to obtain funds from their subsidiaries through dividends, loans or advances. The Euro Notes and the related guarantees are senior unsecured obligations that rank equal in right of payment with all existing and future unsecured senior indebtedness of OFH and each of Omnicom and OCI, as applicable.

Omnicom has fully and unconditionally guaranteed the obligations of Omnicom Capital Holdings plc, or OCH, a U.K.-based wholly owned subsidiary of Omnicom, with respect to the £325 million 2.25% Senior Notes due 2033, or Sterling Notes. OCH’s assets consist of its investments in several wholly owned finance companies that function as treasury centers, providing funding for various operating companies in EMEA, Australia and other countries in the Asia-Pacific region. The finance companies’ assets consist of cash and cash equivalents and intercompany loans that they make or have made to the operating companies in their respective regions and the related interest receivable. There are no restrictions on the ability of Omnicom or OCH to obtain funds from their subsidiaries through dividends, loans or advances. The Sterling Notes and the related guarantee are senior unsecured obligations that rank equal in right of payment with all existing and future unsecured senior indebtedness of OCH and Omnicom, respectively.

The Credit Facility has a financial covenant that requires us to maintain a Leverage Ratio of consolidated indebtedness to consolidated EBITDA (earnings before interest, taxes, depreciation, amortization and non-cash charges) of no more than 3.5 times for the most recently ended 12-month period. At December 31, 2024, we were in compliance with this covenant as our Leverage Ratio was 2.4 times. The Credit Facility does not limit our ability to declare or pay dividends or repurchase our common stock.

At December 31, 2024, our long-term and short-term debt was rated BBB+ and A2 by S&P and Baa1 and P2 by Moody's. Our access to the commercial paper market and the cost of any issuances is affected by market conditions and our credit ratings. The long-term debt indentures and the Credit Facility do not contain provisions that require acceleration of cash payments in the event of a downgrade in our credit ratings.

Credit Markets and Availability of Credit

In light of the uncertainty of future economic conditions, we will continue to take actions available to us to respond to changing economic conditions, and we will manage our discretionary expenditures. We will also continue to monitor and manage the level of credit made available to our clients. We believe that these actions, in addition to the availability of our Credit Facility, are sufficient to fund our near-term working capital needs and our discretionary spending. Information regarding our Credit Facility is provided in Note 7 to the consolidated financial statements.

We have the ability to fund our day-to-day liquidity, including working capital, by issuing commercial paper or borrowing under the Credit Facility. We did not issue commercial paper in 2024. In 2023, we had a maximum of $200 million of commercial paper outstanding during the year, the average amount outstanding was $5.1 million, the average days outstanding were 1.7 days, and the weighted average interest rate was 5.24%. At December 31, 2024, there were no outstanding borrowings under the Credit Facility and no outstanding commercial paper issuances.

We may issue commercial paper to fund our day-to-day liquidity when needed. However, disruptions in the credit markets may lead to periods of illiquidity in the commercial paper market and higher credit spreads. To mitigate any disruption in the credit markets and to fund our liquidity, we may borrow under the Credit Facility or the uncommitted credit lines or access the capital markets if favorable conditions exist. We will continue to monitor closely our liquidity and conditions in the credit markets. We cannot predict with any certainty the impact on us of any disruptions in the credit markets. In such circumstances, we may need to obtain additional financing to fund our day-to-day working capital requirements. Such additional financing may not be available on favorable terms, or at all.

Item 7A. Quantitative and Qualitative Disclosures About Market Risk

We manage our exposure to foreign exchange rate risk and interest rate risk through various strategies, including the use of derivative financial instruments. We use forward foreign exchange contracts as economic hedges to manage the cash flow volatility arising from foreign exchange rate fluctuations. We use net investment hedges to manage the volatility of foreign exchange rates on the investment in our foreign subsidiaries. We do not use derivatives for trading or speculative purposes. Using derivatives exposes us to the credit risk that counterparties to the derivative contracts will fail to meet their contractual obligations. We manage that risk through careful selection and ongoing evaluation of the counterparty financial institutions based on specific minimum credit standards and other factors.

We evaluate the effects of changes in foreign currency exchange rates, interest rates and other relevant market risks on our derivatives. We periodically determine the potential loss from market risk on our derivatives by performing a value-at-risk, or VaR, analysis. VaR is a statistical model that uses historical currency exchange rate data to measure the potential impact on future earnings of our derivative financial instruments assuming normal market conditions. The VaR model is not intended to represent actual losses but is used as a risk estimation and management tool. Based on the results of the model, we estimate with 95% confidence a maximum one-day change in the net fair value of our derivative financial instruments at December 31, 2024 was not material.

Foreign Currency Exchange Risk

In 2024, our international operations represented approximately 48% of our revenue. Changes in the value of foreign currencies against the U.S. Dollar affect our results of operations and financial condition. For the most part, because the revenue and expenses of our foreign operations are denominated in the same local currency, the economic impact on operating margin is minimized. The effects of foreign currency exchange transactions on our results of operations are discussed in Note 2 to the consolidated financial statements.

We operate in all major international markets including the U.K., Euro Zone, Australia, Brazil, Canada, China and Japan. Our agencies transact business in more than 50 different currencies. As an integral part of our global treasury operations, we centralize our cash and use notional multicurrency pools to manage the foreign currency exchange risk that arises from imbalances between subsidiaries and their respective treasury centers. In addition, there are circumstances where revenue and expense transactions are not denominated in the same currency. In these instances, amounts are either promptly settled or hedged with forward foreign exchange contracts. To manage this risk, at December 31, 2024, we had outstanding forward foreign exchange contracts with an aggregate notional amount of $4.7 million. The net fair value of the forward foreign contracts at December 31, 2024 was not material (see Note 22 to the consolidated financial statements). At December 31, 2023, there were no forward foreign exchange contracts outstanding.

Foreign currency derivatives are designated as economic hedges; therefore, any gain or loss in fair value incurred on those instruments is generally offset by decreases or increases in the fair value of the underlying exposure. By using these financial instruments, we reduce financial risk of adverse foreign exchange changes by foregoing any gain which might occur if the markets move favorably. The terms of our forward foreign exchange contracts are generally less than 90 days.

We have fixed-to-fixed cross currency swaps with a notional value of $150 million that hedge a portion of the net investment in our Japanese subsidiaries against volatility in the Yen/U.S. Dollar exchange rate. The swaps are designated and qualify as a hedge of a net investment in a foreign subsidiary and are scheduled to mature in 2025 and 2029. Changes in the fair value of the swaps are recognized in foreign currency translation and are reported in accumulated other comprehensive income (loss), or AOCI. Any gain or loss will remain in AOCI until the complete or substantially complete liquidation of our investment in the underlying operations. We have elected to assess the effectiveness of our net investment hedges based on changes in spot exchange rates. We receive net fixed U.S. Dollar interest payments. We recorded a reduction of interest expense of $6.6 million in each of 2024 and 2023. At December 31, 2024, an asset of $9.3 million is recorded in other assets, and at December 31, 2023, a liability of $6.6 million is recorded in long-term liabilities, for the swap fair value.

Interest Rate Risk

We may use interest rate swaps to manage our interest cost and structure our long-term debt portfolio to achieve a mix of fixed rate and floating rate debt. There were no interest rate swaps in 2024 and 2023. Long-term debt at December 31, 2024 and 2023 consisted entirely of fixed-rate debt.

Credit Risk

We provide marketing and communications services to several thousand clients that operate in nearly every sector of the global economy, and we grant credit to qualified clients in the normal course of business. Due to the diversified nature of our client base, we do not believe that we are exposed to a concentration of credit risk as our largest client represented 2.7% of revenue in 2024. However, during periods of economic downturn, the credit profiles of our clients could change.

local law and the client agreement, many of our agencies purchase media and production services for our clients as an agent for a disclosed principal. In addition, while operating practices vary by country, media type and media vendor, in the United States and certain foreign markets, many of our agencies’ contracts with media and production providers specify that our agencies are not liable to the media and production providers under the theory of sequential liability until and to the extent we have been paid by our client for the media or production services.

Where purchases of media and production services are made by our agencies as a principal or are not subject to the theory of sequential liability, the risk of a material loss as a result of payment default by our clients could increase significantly and such a loss could have a material adverse effect on our business, results of operations and financial condition.

Item 8. Financial Statements and Supplementary Data

See Item 15, “Exhibits, Financial Statement Schedules.”

Item 9. Changes in and Disagreements With Accountants on Accounting and Financial Disclosure

None.

Item 9A. Controls and Procedures

We maintain disclosure controls and procedures designed to ensure that information required to be disclosed in reports we file with the SEC is recorded, processed, summarized and reported within applicable time periods. Disclosure controls and procedures include, without limitation, controls and procedures designed to ensure that information required to be disclosed by us in the reports we file or submit under the Securities Exchange Act of 1934, as amended, or the Exchange Act, is accumulated and communicated to management, including our Chief Executive Officer, or CEO, and Chief Financial Officer, or CFO, as appropriate to allow timely decisions regarding required disclosure. Management, including our CEO and CFO, conducted an evaluation of the effectiveness of our disclosure controls and procedures as of December 31, 2024. Based on that evaluation, our CEO and CFO concluded that, as of December 31, 2024, our disclosure controls and procedures are effective to ensure that decisions can be made timely with respect to required disclosures, as well as ensuring that the recording, processing, summarization and reporting of information required to be included in our Annual Report on Form 10-K for the year ended December 31, 2024 are appropriate.

Our management is responsible for establishing and maintaining adequate internal control over financial reporting, as such term is defined in Exchange Act Rule 13a-15(f). Management, with the participation of our CEO, CFO and our agencies, conducted an evaluation of the effectiveness of our internal control over financial reporting based on the framework in Internal Control – Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission. Based on that evaluation, our CEO and CFO concluded that our internal control over financial reporting was effective as of December 31, 2024.

Omnicom management excluded Flywheel Digital from its assessment of the effectiveness of Omnicom’s internal control over financial reporting as of December 31, 2024, in accordance with SEC staff guidance allowing management to exclude a recently acquired business from management’s report on internal control over financial reporting. Flywheel Digital constituted two percent of total revenue for the year ended December 31, 2024 and two percent of total assets, excluding acquired goodwill and other intangible assets, as of December 31, 2024.

There have not been any changes in our internal control over financial reporting during our most recent fiscal quarter that have materially affected or are reasonably likely to materially affect our internal control over financial reporting.

OMC US Equity

OMC · 10-K · period ended 2024-12-31

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 Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities

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

Item 7A. Quantitative and Qualitative Disclosures About Market Risk

Item 8. Financial Statements and Supplementary Data

Item 9. Changes in and Disagreements With Accountants on Accounting and Financial Disclosure

Item 9A. Controls and Procedures

OMC US Equity☆

OMC · 10-K · period ended 2024-12-31

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 Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities

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

Item 7A. Quantitative and Qualitative Disclosures About Market Risk

Item 8. Financial Statements and Supplementary Data

Item 9. Changes in and Disagreements With Accountants on Accounting and Financial Disclosure

Item 9A. Controls and Procedures

OMC US Equity