Omnicom Group Inc., together with its subsidiaries, offers advertising, marketing, and corporate communications services. It provides a range of services in the areas of advertising and media, precision marketing, commerce and branding, experiential, execution and support, public relations, and healthcare. The company's services include advertising, branding, content marketing, corporate social responsibility consulting, crisis communications, custom publishing, data analytics, database management, digital/direct marketing and post-production, digital transformation consulting, entertainment marketing, experiential marketing, field marketing, sales support, financial/corporate business-to-business advertising, graphic arts/digital imaging, healthcare marketing and communications, and instore design services. Its services also comprise interactive marketing, investor relations, marketing research, media planning and buying, retail media planning and buying, merchandising and point of sale, mobile marketing, multi-cultural marketing, non-profit marketing, organizational communications, package design, product placement, promotional marketing, public affairs, public relations, retail marketing, retail media and e-commerce, search engine marketing, shopper marketing, social media marketing, and sports and event marketing services. It operates in the North and Latin America, Europe, the Middle East and Africa (EMEA), and the Asia Pacific. The company was incorporated in 1944 and is based in New York, New York.

The Interpublic Group of Companies, Inc. provides advertising and marketing services worldwide. It operates in three segments: Media, Data & Engagement Solutions, Integrated Advertising & Creativity Led Solutions, and Specialized Communications & Experiential Solutions. The Media, Data & Engagement Solutions segment provides media and communications services, digital services and products, advertising and marketing technology, e-commerce services, data management and analytics, strategic consulting, and digital brand experience under the IPG Mediabrands, UM, Initiative, Kinesso, Acxiom, Huge, MRM, and R/GA brand names. The Integrated Advertising & Creativity Led Solutions segment offers advertising, corporate, and brand identity services; and strategic consulting under FCB, IPG Health, McCann Worldgroup, and MullenLowe Group brands. Specialized Communications & Experiential Solutions segment provides public relations and other specialized communications services, live events, sports and entertainment marketing, and strategic consulting under IPG DXTRA Health, The Weber Shandwick Collective, Golin, Jack Morton, Momentum, and Octagon brand names. The company was formerly known as McCann-Erickson Incorporated and changed its name to The Interpublic Group of Companies, Inc. in January 1961. The Interpublic Group of Companies, Inc. was founded in 1902 and is headquartered in New York, New York.

DoubleVerify Holdings, Inc. provides a software platform for digital media measurement, and data analytics in the United States and internationally. The company provides solutions to advertisers that enable advertisers to increase the effectiveness and quality and return on their digital advertising investments. It offers DV Authentic Ad, a metric of digital media quality, which evaluates the existence of fraud-free, brand-suitable, viewability, and geography for each digital ad; DV Authentic Attention that provides actionable, and comprehensive data to drive campaign performance; and Custom Contextual solution, which allows advertisers to match their ads to relevant content to maximize user engagement and drive campaign performance. In addition, the company provides DV Publisher suite, a solution for digital publishers to manage revenue and increase inventory yield by improving video delivery, identifying lost or unfilled sales, and aggregate data across all inventory sources; and DV Pinnacle, a service and analytics platform user interface that allows its customers to adjust and deploy controls for their media plan and track campaign performance metrics across channels, formats, and devices. Further, it offers software solutions are integrated in the digital advertising ecosystem, including programmatic platforms, social media channels, and digital publishers. It serves brands, publishers, and other supply-side customers covering various industry verticals, including consumer packaged goods, financial services, telecommunications, technology, automotive, and healthcare. The company was founded in 2008 and is headquartered in New York, New York.

Integral Ad Science Holding Corp. operates as a digital advertising verification company in the United States, the United Kingdom, France, Ireland, Germany, Italy, Singapore, Australia, Japan, India, and the Nordics. The company provides IAS Signal, a cloud-based technology platform that offers return on ad spend needs; and deliver independent measurement and verification of digital advertising across devices, channels, and formats, including desktop, mobile, connected TV, social, display, and video. Its digital media quality solutions offer ad fraud detection and prevention, viewability, brand safety and suitability, contextual targeting, inventory yield management, and reporting. In addition, the company offers Quality Impressions, a metric designed to verify that digital ads are served to a real person rather than a bot, viewable on-screen, and presented in a brand-safe and suitable environment in the correct geography; Context Control solution that delivers contextual targeting and brand suitability capabilities; pre-bid programmatic and post-bid verification solutions for advertisers; and optimization and verification solutions for publishers. It serves advertisers and agencies, publishers, and supply side platforms. The company was founded in 2009 and is headquartered in New York, New York.

Stagwell Inc. provides digital transformation, performance media and data, consumer insights and strategy, and creativity and communications services. The company operates through three segments: Integrated Agencies Network, Brand Performance Network, and Communications Network. It designs and builds digital platforms and experiences that support the delivery of content, commerce, service, and sales; creates websites, mobile applications, back-end systems, content and data management systems, and other digital environments; designs and implements technology and data strategies; and develops software and related technology products, including artificial intelligence (AI)-enabled communications, research, and media technology, cookie-less data platforms for advance targeting and activation, software tools for e-commerce applications, specialty media solutions in the augmented reality space, and text messaging applications for consumer engagement. The company also provides audience analysis, and media buying and planning services; and strategic insights and guidance services that offers business content, product, communications, and media strategies. In addition, it offers strategy development, advertising creation, live events, immersive digital experiences, cross platform engagement, and social media content services; and leadership, investor and financial relations, social media, executive positioning and visibility, strategic communication, public relation, and public affair services. Further, the company provides Stagwell Marketing Cloud, a suite of software-as-a-service (SaaS) and data-as-a-service (DaaS) technology solutions, including research and insights, communications technology, advance media platform, and media studios; and technology-driven solutions for in-house marketers. Stagwell Inc. is headquartered in New York, New York.

Outbrain Inc., together with its subsidiaries, operates a technology platform that connects media owners and advertisers with engaged audiences to drive business outcomes worldwide. It offers a suite of solutions for media owners that facilitates content discovery and monetization for its media partners on their own sites; Onyx by Outbrain, a branding platform; AI platform that delivers customized experiences; engaging video experiences for publisher audience development and advertiser purposes; tools and services to promote organic editorial experiences to their audiences, enhancing audience engagement, recirculation, and monetization opportunities; and Keystone by Outbrain technology that extends ad server optimization. The company also provides advertising solutions for advertisers, including ad experiences, such as standard native, carousel and app install ads, outstream video, contextual pre-roll video, and high-impact display; AI-powered prediction engines; Conversion Bid Strategy tool that uses engagement data and machine learning to optimize bid strategies to hit the advertiser's desired campaign goals; data comprising targeting offerings based on consumer interest segments, as well as complex offerings that predict audience characteristics based on contextual and interest data; Outbrain platform, which enables advertisers to optimize campaign goals, engagement, and delivering other measurable business outcomes; and full-stack buying solutions. Outbrain Inc. was incorporated in 2006 and is headquartered in New York, New York.

Fluent, Inc. provides data-driven digital marketing services in the United States and internationally. The company operates through Fluent and All Other segments. It offers customer acquisition services by operating digital marketing campaigns, through which the company connects its advertiser clients with consumers. The company also delivers data and performance-based marketing executions to various consumer brands, direct marketers, and agencies across a range of industries, including financial products and services, media and entertainment, health and life sciences, retail and consumer, and staffing and recruitment. Fluent, Inc. was founded in 2010 and is headquartered in New York, New York.

AdTheorent Holding Company, Inc., a digital media platform, provides programmatic digital advertising services for advertising agency and brand customers in the United States, Canada, and internationally. It uses machine learning and advanced data science to organize, analyze, and operationalize non-sensitive data to deliver real-world value for customers. The company offers predictive targeting solutions across various customer industry verticals and consumer screens, including customized targeting, measurement, and analytical services; and location-based targeting and geo-intelligence solutions. AdTheorent Holding Company, Inc. was founded in 2012 and is headquartered in New York, New York. As of June 21, 2024, AdTheorent Holding Company, Inc. operates as a subsidiary of Cadent, LLC.