WPP, Publicis, Omnicom, Havas, Dentsu: Why every advertising holding company is rebuilding itself

For years, the world's largest advertising holding companies looked remarkably similar. Each owned a constellation of media agencies, creative agencies, public relations firms, commerce specialists, production companies and data businesses, stitched together through acquisitions accumulated over decades. Scale was the competitive advantage. More agencies meant more clients, greater buying power and deeper specialization.That model is now being dismantled.Over the past eighteen months, virtually every global advertising holding company has embarked on some form of structural reinvention. WPP has retired one of the most recognisable names in media buying, replacing GroupM with WPP Media. Omnicom is integrating Interpublic Group in what is expected to become the largest advertising company by revenue. Publicis Groupe continues to organise itself less like a traditional agency network and more like a technology platform built around data, commerce and artificial intelligence.These are not isolated corporate restructurings. Together, they represent the biggest reorganisation of the global advertising business since media buying was separated from creative agencies in the 1990s.The implications extend well beyond the global epicentres and headquarters in the West. India, now among the fastest-growing advertising markets globally, sits squarely at the centre of this transformation. Every major holding company has significant operations in the country, manages billions of rupees in media investments and works with many of India's largest advertisers.The question is no longer whether agency groups are changing. It is what they are changing into.Why the old model stopped workingFor decades, agency holding companies were built around specialisation.Creative agencies developed campaigns. Media agencies planned and bought advertising. Public relations firms handled reputation. Digital agencies built websites. Commerce teams focused on marketplaces. Production companies created content.Clients often hired several agencies from the same holding company without those businesses working particularly closely together.That separation increasingly became a problem.Marketing today is no longer organised neatly around channels. Consumers move between streaming platforms, retail apps, social media, creator content, gaming ecosystems and physical stores in a single purchase journey. Campaigns require creative ideas, audience data, commerce technology, media optimisation and measurement to operate together rather than independently.At the same time, chief marketing officers are facing pressure to simplify agency relationships while demanding measurable business outcomes instead of isolated campaign metrics.Artificial intelligence has accelerated these pressures by making it possible to connect planning, production, personalisation and measurement on a common technology platform.In effect, clients no longer want a collection of agencies. They increasingly want one integrated operating system.WPP's most visible resetPerhaps the clearest signal of this shift came in May 2025, when WPP officially retired the GroupM name and launched WPP Media, ending more than two decades during which GroupM had become the world's largest media investment company. According to WPP, the new organisation combines media, data and production capabilities on a common AI-enabled platform called WPP Open, supported by annual investments of approximately £300 million in AI and technology. Mindshare, Wavemaker and EssenceMediacom continue to exist as client-facing brands, but now operate within a more integrated structure.Read more: WPP unveils trust principles as Cindy Rose outlines AI-era roadmapIn announcing the move, WPP said marketers increasingly wanted integrated capabilities rather than fragmented services. The company described WPP Media as an AI-powered media business designed to unify media, production, data and commerce instead of treating them as separate disciplines.The announcement followed months of organisational changes, leadership restructuring and reports of operational consolidation across markets, including India.Storyboard18 had reported extensively on the transition, including the strategic thinking behind the rebranding, leadership changes and the broader implications for agency operations.Omnicom and IPG: Bigger than a mergerIf WPP's transformation reflects simplification, Omnicom's acquisition of Interpublic reflects consolidation.Announced in late 2024, the transaction combines two of the industry's largest holding companies, bringing together agencies including OMD, PHD, BBDO, TBWA, McCann, Initiative and Mediabrands under one corporate parent.The combined organisation is intended to strengthen investments in technology, data and AI while generating operational efficiencies across real estate, technology and support functions. Integration is expected to reduce duplication while allowing larger investments in proprietary marketing platforms.For clients, the deal potentially offers broader capabilities from a single partner. For competitors, it raises the pressure to become larger, more integrated and more technologically sophisticated.Publicis took a different routeUnlike some rivals, Publicis has largely avoided headline-grabbing restructurings.Instead, it has spent several years building what it calls an integrated operating model around first-party data, identity, commerce and artificial intelligence.Major acquisitions in data, digital commerce and technology consulting have fundamentally changed the company's revenue mix. Increasingly, Publicis positions itself not simply as an advertising network but as a business transformation partner.That strategy has allowed it to compete less on agency brands and more on technology platforms, customer data capabilities and measurable business outcomes.Its recent financial updates continue to emphasise AI, connected media, commerce and digital transformation as core growth drivers rather than traditional advertising services.Also read: From agencies to ecosystems: How holding companies are owning the creator economyA different playbook: Havas bets on convergenceHavas has chosen evolution over large-scale restructuring.Rather than undertaking major organisational overhauls, the company has continued to build around its long-standing "converged" strategy, which seeks to bring together creative, media, health, entertainment and customer experience businesses under a unified operating model.The approach has gained greater urgency following Havas' public listing in late 2024. Since then, the group has continued investing in artificial intelligence, proprietary data platforms and integrated client teams while expanding its capabilities in creator marketing, commerce and entertainment.Chairman and CEO Yannick Bolloré has consistently framed AI as a force that should amplify human creativity rather than replace it, arguing that the industry's competitive advantage will increasingly lie in combining technology with strategic and creative thinking. Havas continues to invest in AI-enabled workflows while maintaining that ideas remain at the centre of brand building.For India, where Havas has steadily expanded across creative, media and health communications, the strategy mirrors the broader industry shift toward integrated client solutions without abandoning specialist brands.Alo read: Layoffs, rival narratives and culture questions: Inside Omnicom’s integration of IPGDentsu's transformation is less visible—but equally profoundUnlike WPP or Omnicom, Dentsu's transformation has been underway for several years.The Japanese advertising giant has reorganised itself around Customer Transformation & Technology (CT&T), combining consulting, technology, commerce, customer experience and media into a single growth proposition. Rather than defining itself primarily as an agency holding company, Dentsu, like the others, increasingly positions itself as a business transformation partner capable of connecting marketing with technology and customer experience.In 2026, the company has continued to emphasise AI-enabled marketing, predictive analytics and integrated client delivery. Leadership has repeatedly highlighted that artificial intelligence should improve the quality and speed of marketing decisions while allowing employees to focus on higher-value strategic work.India remains one of Dentsu's largest and fastest-growing markets globally, making it an important testing ground for integrated services spanning media, creative, customer experience, consulting and technology.Like its rivals, Dentsu is ultimately moving away from managing multiple agency silos and toward building unified client teams supported by shared data, AI and technology infrastructureAlso read: 'India is a self-sustaining growth story': Rana Barua on Havas India’s expansion, AI and the future of agenciesAI is the catalyst, not the causeIt is tempting to describe all these changes as an "AI story."That would be incomplete.Artificial intelligence is undoubtedly reshaping advertising. Creative assets can now be produced faster. Media planning is becoming increasingly automated. Consumer insights are generated in real time. Personalisation happens at unprecedented scale.But many of the structural pressures predate generative AI.Brands have been demanding simpler agency relationships for years. Procurement teams have pushed agencies to demonstrate measurable returns. Consulting firms expanded into marketing. Technology companies built self-service advertising platforms that reduced dependence on traditional intermediaries.AI simply accelerated trends already underway.Instead of replacing agencies, it is forcing them to redefine where their value lies.Execution is becoming cheaper. Judgment is becoming more valuable.What this means for IndiaIndia may ultimately become one of the biggest beneficiaries of this transformation.The country's digital economy continues to expand rapidly, advertisers are investing across retail media, creator ecosystems, connected television and commerce platforms, and multinational clients increasingly expect integrated regional solutions.Agency leaders in India are already reorganising around these realities.Rather than operating independent media, creative and commerce teams, many are building cross-functional client units supported by shared technology platforms and centralised data capabilities.The skills agencies hire for are changing as well.Data scientists, AI specialists, commerce strategists, marketing technologists and measurement experts are becoming as essential as traditional planners and creatives.Creative thinking remains central.But increasingly, creativity is expected to work alongside technology rather than independently of it.The end of the holding company—or its reinvention?The traditional holding company is unlikely to disappear.Instead, it is evolving into something fundamentally different.Its value will increasingly come not from owning the greatest number of agency brands but from connecting creative talent, proprietary technology, customer data, AI infrastructure and commerce capabilities into a single operating model.Agency names may continue to exist.Organisational silos may not.For much of the past three decades, the advertising business was organised around channels.The next decade appears likely to be organised around intelligence.And for an industry built on helping brands adapt to change, that may be its most consequential reinvention yet.Also read: Exclusive: Dentsu poised to secure Air India's media business