UBS’s post-Cannes Lions debrief leaves little doubt that WPP PLC (LSE:WPP) needs to up the pace if it is to reclaim growth, while its peers race ahead on artificial intelligence and client wins.
Last week’s festival in the South of France drew the bank's analysts into thirty meetings with the chiefs of every major holding company, challenger agency and ad-tech player.
From Publicis’s chief executive to WPP’s EMEA media boss, and Omnicom’s leaders through to independents such as Broadlab, the same refrain echoed: “AI was the dominant theme, mentioned in almost every meeting,” UBS says.
For WPP, UBS retains a 'sell' rating, noting that while its acquisition of data-privacy firm InfoSum and wider media restructuring were discussed, “more change was required to bring the company back to growth.”
In other words, WPP’s current plans fall short of what clients and investors expect in an industry under intensifying technological pressure.
Contrast that with Publicis, which UBS dubs its top cyclical pick. “Publicis appears to have the differentiated capabilities it needs to keep its client-winning streak going,” the bank observes.
Recent wins at Mars and Coca-Cola lend weight to the view that consensus forecasts for organic growth, which sit at under 4% for 2026, may prove too conservative.
Yet amid the optimism, UBS flags a flatter advertising market overall.
Macro-driven caution has kept budgets broadly unchanged year on year, with performance marketing gobbling up share at the expense of brand building.
Anecdotally, some clients are holding fire on large-scale creative briefs until they see firmer economic signals.
Looking ahead, the landscape is set to fragment further. Emerging platforms, from large-language models to Netflix and even messaging apps such as WhatsApp, promise new audience touchpoints, but also greater complexity.
While many brands talk of in-housing media, UBS judges this still a distant prospect; for now, “agentic AI is a potential enabler” for agencies to take on more campaign tasks.
The shift towards outcome-based pricing is underway, though UBS cautions that clients “need more time” to embrace the model fully.
Independents, sensing an opening as the big three grapple with transition pains, have so far made only modest headway. Likewise, ad-tech realignments continue apace: Amazon’s demand-side platform is gaining traction, but its ultimate impact on incumbents remains uncertain.
Cannes Lions itself seems to have outgrown its festival roots: UBS notes that Informa’s investor day, held against the Riviera backdrop, left management confident in 2025 performance and longer-term returns from its festivals business and Middle East expansion.
Taken together, UBS’s findings suggest a market at an inflexion point. Publicis emerges as the best-placed major agency to harness AI-driven growth and client momentum; WPP faces a steeper climb, and Omnicom’s upside remains tied to approval of its proposed IPG deal.
For investors and clients alike, the message is clear: the next chapter in global advertising will belong to those who move fastest on technology and strategic reinvention.