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.

ExlService Holdings, Inc. operates as a data analytics, and digital operations and solutions company in the United States and internationally. The company operates through Insurance, Healthcare, Analytics, and Emerging Business segments. It also provides digital operations and solutions and analytics-driven services, such as claims processing, premium and benefit administration, agency management, account reconciliation, policy research, underwriting support, new business acquisition, policy servicing, premium audit, surveys, billing and collection, commercial and residential survey, and customer service using digital technology, artificial intelligence, machine learning, and advanced automation; digital customer acquisition services using a software-as-a-service delivery model through LifePRO and LISS platforms; subrogation services; and Subrosource software platform, an end-to-end subrogation platform. In addition, the company offers health care services related to care management, utilization management, disease management, payment integrity, revenue optimization, and customer engagement. Further, it provides financial planning and analysis, management reporting, forecasting and decision support, data management, regulatory reporting and risk, and compliance services; reservations, customer, and fulfilment services; freight billing, collections, claims management, freight audit, freight scheduling, supply chain management, and revenue assurance services; residential mortgage lending, title verification and validation, retail banking and credit cards, trust verification, commercial banking, and investment management; merchandising, pricing, and demand forecasting; and digital operations and solutions. The company offers predictive and prescriptive analytics in the areas of customer acquisition and lifecycle management. ExlService Holdings, Inc. was founded in 1999 and is headquartered in New York, New York.

QuinStreet, Inc., an online performance marketing company, provides customer acquisition services for its clients in the United States and internationally. The company offers online marketing services, such as qualified clicks, leads, calls, applications, and customers through its websites or third-party publishers. It serves financial and home services industries. The company was incorporated in 1999 and is headquartered in Foster City, California.

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.

Harte Hanks, Inc. operates as a customer experience company in the United States and internationally. The company offers data and analytics, including audience identification, profiling, segmentation and prioritization, predictive modeling and data strategy; Research, an understanding of customers, category, competitors, and capabilities; strategy, plans and executes omnichannel marketing, demand generation and customer experience programs; creative and content, including creative concepts, messaging and content assets for print, broadcast, direct mail, website, app, display, social, mobile, search engine marketing, and voice; marketing technology, a website and app development, e-commerce development and enablement, database building and management, platform architecture creation, and marketing automation; digital and multi-channel marketing execution, programs and campaigns across multiple channels, territories, and audiences; demand generation and account based marketing; and managed marketing services. It also provides product, print-on-demand, and mail fulfillment services, including as printing on demand, managing product recalls, and distributing literature and promotional products; custom solutions to engage audiences, target customers, support conferences, and appreciate employees; and third-party logistics and freight optimization services. In addition, the company offers inside sales outsourcing, provides B2B enterprises, and small to midsized businesses with an outsourced sales service; lead generation services; and sales play development, as well as self-service solution through interactive voice response, help centers, online, and via apps and channel technology. It serves B2B, healthcare, pharmaceuticals, health insurance, consumer, travel, hospitality, streaming, entertainment, quick service restaurants, financial, fintech, automotive, and retail markets. The company was founded in 1923 and is headquartered in Chelmsford, Massachusetts.

Collective Audience, Inc. provides audience-based performance advertising and media platform for brands, agencies and publishers in the United States. The company offers push business unit, such as lead generation and performance based engagement; BattleBridge, a full-service branding and digital marketing agency serving both external clients and other DLQ business units which offers branding and identity development in addition to digital strategy, and media buying services, as well as all necessary ancillary and supporting services to enable the branding and digital practices. It also provides push business unit, including Marble, a proprietary architecture that ingests data from owned and operated brands as a Consumer Data Profile; and Outcome, a self-service lead generation marketplace targeting SMB service providers. Collective Audience, Inc. 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.