Edited on Jun 24, 2026
Part of EPR's AdTech and MarTech pillar.
WPP, Omnicom, Publicis, Interpublic Group (IPG), Stagwell, and Havas are mid-restructure around three pressures simultaneously. AI workflow integration is absorbing creative and media-buying labor faster than the holding companies built it. The post-cookie audience-data economy is reshaping how holding companies sell audience access to their clients. And the consolidation of in-house brand teams has absorbed creative production work that the agency tier used to own. The holding company that survives the next five years is the one that has migrated its commercial model from labor billing to outcome billing.
This is the operating reference on what each major holding company actually owns, what they are selling in 2026, and what brand-side procurement teams need to know to negotiate.
The Five Major Holding Companies
WPP. Mark Read stepped down as CEO in September 2025 after seven years and was succeeded by Cindy Rose. The second-largest holding company by global revenue, headquartered in London. Owns GroupM (media), Ogilvy, VML (formed from the 2024 Wunderman Thompson and VMLY&R merger), and Burson (the merged PR entity formed in 2024 from BCW and Hill+Knowlton Strategies). FGS Global was sold to KKR in late 2024. The 2024–2026 restructuring has compressed the brand portfolio from 200+ agency brands to fewer than 50. Burson is itself in a Goldman Sachs-led sale process as of April 2026.
Omnicom Group. John Wren remains CEO. Headquartered in New York. Owns OMD, PHD, Hearts & Science (media), BBDO, DDB, TBWA (creative), and — through Omnicom Public Relations Group (OPRG) — four cornerstone PR networks: Golin Ketchum, FleishmanHillard, Weber Shandwick, and MMC. The Omnicom-IPG merger announced December 2024 closed on November 26, 2025, creating the largest agency holding company in history. The February 10, 2026 OPRG restructuring consolidated overlapping brands.
Interpublic Group (IPG). Acquired by Omnicom on November 26, 2025. The IPG legacy brands — McCann, FCB, MullenLowe, IPG Mediabrands (UM, Initiative), Weber Shandwick, Golin (now part of Golin Ketchum) — now operate under the combined Omnicom-IPG umbrella. R&CPMK was dissolved in the February 2026 OPRG restructuring. R/GA was sold by IPG to Truelink Capital in 2023 and is no longer part of the holding company.
Publicis Groupe. Arthur Sadoun remains Chairman and CEO. Headquartered in Paris. Owns Publicis Media (Starcom, Zenith, Spark Foundry), Leo Burnett, Saatchi & Saatchi, Publicis Sapient (digital transformation consultancy), MSL (PR), Kekst CNC (financial PR), and the Epsilon/CitrusAd data infrastructure. Publicis is the holding company with the most aggressive bet on data and digital transformation as the substitute for traditional creative billing.
Stagwell Inc. (NASDAQ: STGW). The fifth major holding company. Founded 2015 by Mark Penn as a $250M LLC; merged with MDC Partners in 2021 to form the publicly traded entity. Today: 70+ agency brands, 13,000+ employees, $2B+ revenue. Operates three segments — Integrated Agencies Network, Brand Performance Network (BPN), and Communications Network (SKDK, Allison+Partners, Sloane & Company, Targeted Victory). Penn remains Chairman and CEO.
Havas. Yannick Bolloré chairs the group; Mark Sinnock as Global Chief Strategy, Data & Innovation Officer. Headquartered in Paris. Spun off from Vivendi in 2024. Smaller than the other four but with sharper creative-network identity around the Havas Village operating model. PR through Havas Red (the merged Red Havas micronetwork, rebranded 2024) and Havas Health & You (the global healthcare communications network).
What Changed Between 2018 and 2026
Three structural shifts have reshaped the holding-company economics.
Client procurement consolidation. Brand-side procurement teams have pushed agency fee structures from time-and-materials billing toward output-based and outcome-based pricing. The holding companies' commercial model — built on billing hours for labor — has been forced to migrate. The agencies that survive the migration are the ones that produced measurable client outcomes at scale; the agencies that did not are losing share to the in-house teams and the consultancy roll-ups.
In-house consolidation. Major brands — Pepsi, P&G, Bank of America, Verizon, Mondelez — have built in-house creative teams that absorb a meaningful share of the work that traditionally ran through agencies. The holding companies have responded by selling more specialized strategic work (innovation consulting, brand transformation, AI-workflow design) that the in-house teams cannot replicate at scale. The pivot is real but the revenue per client engagement has structurally lowered.
Consultancy roll-ups. Accenture Song, Deloitte Digital, IBM iX, McKinsey Periscope, and the broader management-consulting tier have absorbed pieces of the agency business model — particularly the marketing-technology integration, customer-experience design, and the digital transformation work. The competitive set for the holding companies now includes Big Four professional services firms as well as the traditional agency competitors.
The AI Workflow Pressure
AI is the structural pressure that has accelerated everything else. Creative production, media planning and buying, market research, copywriting, image generation, video production, and account management workflows have all absorbed AI tools across the 2023–2026 cycle. The labor hours required to produce a unit of creative or media output have fallen. The holding companies that priced on labor hours have either had to migrate the commercial model or accept revenue compression on existing accounts.
The agencies that have migrated well — Publicis Sapient's bet on AI-augmented digital transformation, Accenture Song's AI-native operating model, the leading independent shops that run small AI-augmented teams — are growing share. The agencies that have not are losing it.
Holding-company corporate hubs:
Mergers and restructurings:
Holding-company subsidiaries and operating firms:
Adjacent EPR pillars:
Frequently Asked Questions
What is an advertising holding company? A multi-brand parent company that owns multiple advertising, media, public relations, and marketing services agencies. The major holding companies — Omnicom (now including the former IPG), WPP, Publicis, Stagwell, and Havas — operate global agency networks across creative, media buying, PR, digital, data, and specialty services.
What happened with the Omnicom-IPG merger? Announced December 2024 and closed on November 26, 2025. The combined Omnicom-IPG entity became the largest agency holding company by revenue. The February 10, 2026 restructuring consolidated overlapping PR brands: Golin merged with Ketchum into Golin Ketchum; Porter Novelli was absorbed into FleishmanHillard; R&CPMK was dissolved.
Why is the holding-company business model under pressure? Three pressures converged. AI workflow integration absorbed the creative and media-buying labor that the holding-company billing model depended on. In-house consolidation at major brands absorbed creative production work the agencies used to own. Consultancy roll-ups (Accenture Song, Deloitte Digital, IBM iX) absorbed the marketing-technology integration and digital transformation work. The holding company that survives the next five years has migrated its commercial model from labor billing to outcome billing.
Who are the consultancy competitors? Accenture Song, Deloitte Digital, IBM iX, McKinsey Periscope, and the broader management-consulting tier.
Which holding company is winning the AI transition? Publicis is the holding company with the most aggressive bet on data and digital transformation as the substitute for traditional creative billing. Publicis Sapient runs the AI-augmented digital transformation practice. WPP under Cindy Rose has aggressively compressed the brand portfolio from 200+ agencies to fewer than 50 in pursuit of operational efficiency. The combined Omnicom-IPG entity is mid-integration. Stagwell, under Mark Penn, has positioned around data and technology since founding. Havas is smaller but moving fast.
