The Interpublic Group of Companies, Inc.

Who owns Interpublic Group?
Interpublic Group is now a wholly owned subsidiary of Omnicom Group. Omnicom completed its acquisition of IPG on November 26, 2025, in an all-stock transaction. Each IPG share converted to 0.344 Omnicom shares. Legacy Omnicom shareholders own approximately 60.6% of the combined company and legacy IPG shareholders own approximately 39.4%. IPG common stock ceased trading on the NYSE.

Is Interpublic Group publicly traded?
IPG was publicly traded on the New York Stock Exchange under the ticker IPG until November 26, 2025. After the Omnicom acquisition closed, IPG common stock ceased trading. The combined company, Omnicom Group, trades on the NYSE under the ticker OMC. Former IPG shareholders now hold Omnicom shares.

When was Interpublic Group founded?
IPG was incorporated in Delaware in September 1930 as McCann-Erickson Incorporated, combining agency businesses founded in 1902 by Alfred W. Erickson and in 1911 by Harrison K. McCann. The company adopted the Interpublic Group name in January 1961 when it restructured as a holding company to manage its growing portfolio of agency brands.

What are IPG's main agency networks?
IPG's main agency networks include McCann and FCB in creative advertising, IPG Mediabrands (UM, Initiative, Mediahub) in media buying, Golin and Weber Shandwick in public relations, IPG Health in healthcare marketing, Acxiom and KINESSO in data and technology, Jack Morton and Momentum in experiential marketing, and Octagon in sports and entertainment marketing.

What was IPG's revenue?
IPG reported total revenue of $10.7 billion in FY2024, including billable expenses, and net revenue of $9.2 billion. Reported net income was $689.5 million, and adjusted EBITA was $1.5 billion with a margin of 16.6%. In 2025, revenue declined, with the company guiding to an organic net revenue decrease of 1% to 2% for the full year due to client account losses.

How did the Omnicom acquisition work?
Omnicom and IPG announced a merger agreement on December 8, 2024. The all-stock transaction closed on November 26, 2025, after regulatory approval from the FTC and European Commission. Each IPG share converted to 0.344 Omnicom shares. The combined company has pro forma revenue exceeding $25 billion and targets $1.5 billion in cost synergies, including $900 million in 2026.

Does IPG own Octagon?
Yes. IPG acquired the sports marketing agency Advantage International in 1997 and combined it with the British agency AGI Group in 1998 under the Octagon name. Octagon became IPG's dedicated sports and entertainment marketing platform. Octagon ranked fourth on the Forbes 2025 Most Valuable Sports Agencies list with approximately $463 million in maximum commissions.

Where is Interpublic Group headquartered?
IPG is headquartered in New York, New York, USA. The company was incorporated in Delaware. IPG operated in approximately 56 countries before the Omnicom acquisition, with about 21,100 employees in the United States and 32,200 internationally as of December 31, 2024.

IPG's origins trace back to two advertising agencies. Alfred W. Erickson founded an advertising agency in 1902. Harrison K. McCann founded McCann-Erickson in 1911. The two businesses combined in September 1930 when the company was incorporated in Delaware as McCann-Erickson Incorporated. This consolidation created one of the largest advertising agencies in the United States at the time.

Through the 1940s and 1950s, McCann-Erickson expanded internationally, opening offices in Europe, Latin America, and Asia. The agency built a reputation for creative work and global reach. By the late 1950s, McCann-Erickson had acquired several other agencies and needed a structure to manage its growing portfolio of brands without forcing them all under the McCann name.

In January 1961, the company restructured as a holding company and adopted the Interpublic Group name. This move allowed IPG to acquire and operate multiple agency brands while giving each its own identity and client roster. The holding company model became the template for the modern advertising group, and competitors later copied it.

Through the 1960s and 1970s, IPG acquired agencies including Marschalk Company, SSC&B, and Dailey & Associates. In 1978, IPG became a publicly traded company, listing its shares on the New York Stock Exchange. The 1980s and 1990s brought further expansion as IPG added public relations, media buying, and specialized marketing firms to its portfolio.

A significant setback occurred in the early 2000s. IPG faced accounting irregularities that forced the company to restate several years of earnings. The restatements, completed between 2002 and 2005, revealed weaknesses in financial controls and led to management changes. IPG recovered under new leadership, rebuilding its financial reporting systems and credibility with investors.

In 1997, IPG acquired Advantage International, a sports marketing agency, and combined it with the British agency AGI Group in 1998 under the Octagon name. Octagon became IPG's dedicated sports and entertainment platform. The agency rebranded from Advantage International to Octagon in 1999.

IPG made several major acquisitions in the 2010s. In 2013, the company acquired the integrated marketing agency R/GA's parent and expanded its digital capabilities. In 2018, IPG acquired Acxiom's Marketing Solutions business for approximately $2.3 billion, adding data and technology capabilities to its portfolio. The Acxiom acquisition was IPG's largest deal and positioned the company in data-driven marketing.

Philippe Krakowsky became CEO in January 2021, succeeding Michael Roth. Krakowsky had previously served as Chief Operating Officer and Chief Strategy Officer. Under his leadership, IPG focused on integrating data and technology across its agency networks while navigating the disruption caused by the COVID-19 pandemic and shifts in the media buying market.

In December 2024, IPG announced a merger agreement with Omnicom Group in an all-stock transaction. The deal received regulatory approval from the US Federal Trade Commission and the European Commission in late 2025. The merger closed on November 26, 2025. Under the terms, each IPG share converted to 0.344 Omnicom shares. Legacy Omnicom shareholders owned approximately 60.6% of the combined company and legacy IPG shareholders owned approximately 39.4%. IPG common stock ceased trading, and the combined company trades under the Omnicom ticker OMC.

Through 2024 and 2025, IPG reduced its workforce ahead of the Omnicom takeover. The company cut approximately 4,100 employees in 2024 and another 2,400 in the first half of 2025. These reductions reflected client account losses in the media trading environment and cost pressure tied to the merger.

IPG published annual sustainability and ESG reports covering environmental, social, and governance performance. The company's sustainability strategy focused on reducing environmental impact, supporting diversity and inclusion, and maintaining ethical business practices across its global operations.

On environmental responsibility, IPG reported greenhouse gas emissions from its operations and set targets for reducing its carbon footprint. The company's environmental reporting covered energy use, business travel, and office operations across its global locations. IPG's footprint is primarily office-based, as the company does not operate manufacturing facilities.

On diversity and inclusion, IPG reported workforce demographics and supported programs to increase representation of women and underrepresented groups in the advertising industry. The company was a participant in industry diversity initiatives and published pay equity analyses.

On governance, IPG maintained a code of conduct and compliance program covering its global agency operations. The company was subject to advertising industry regulations and data privacy laws, including GDPR in Europe and state-level privacy laws in the United States. The Acxiom data business operated under additional data protection and privacy compliance requirements.

Following the Omnicom acquisition, sustainability reporting for the combined company is being integrated under Omnicom's ESG framework. Omnicom publishes its own corporate responsibility reports.

IPG and its agency networks received consistent recognition from advertising industry bodies. McCann, FCB, and IPG Mediabrands were regular winners and shortlist entries at the Cannes Lions International Festival of Creativity. IPG agencies also appeared in Effie Awards rankings, which measure marketing effectiveness.

IPG was included in the S&P 500 index, reflecting its status as one of the largest publicly traded companies in the United States before the Omnicom acquisition. The company was also included in Fortune's rankings of major US corporations.

IPG's Mediabrands and MAGNA units were recognized for media buying and planning capabilities. The data and technology business, anchored by Acxiom, received recognition for data-driven marketing innovation.

IPG faced a major accounting scandal in the early 2000s. The company restated several years of earnings between 2002 and 2005 after discovering accounting irregularities. The restatements revealed weaknesses in financial controls, particularly at acquired agencies. IPG paid penalties and replaced senior management. The company subsequently rebuilt its financial reporting systems and internal controls.

The Omnicom merger drew regulatory scrutiny. The US Federal Trade Commission and the European Commission reviewed the transaction for antitrust concerns. The European Commission granted approval with a condition related to advertising dollars denied from publishers due to political or ideological viewpoints, except under express direction of Omnicom clients. The FTC cleared the deal in September 2025. The merger closed on November 26, 2025 after all regulatory approvals were obtained.

IPG's workforce reductions in 2024 and 2025 drew attention. The company cut approximately 4,100 employees in 2024 and another 2,400 in the first half of 2025. These reductions reflected client account losses and cost pressure tied to the merger. Industry observers raised questions about how the cuts would affect service quality and agency morale.

The Acxiom data business attracted privacy scrutiny. As a major data broker, Acxiom operates under data protection regulations including GDPR and US state privacy laws. IPG faced questions about how consumer data collected through Acxiom was used in advertising targeting, though no major enforcement actions were publicly documented in recent years.