WPP Built 5,000 People for Coca-Cola. Now Coca-Cola Is Reviewing the Relationship.
Coca-Cola has launched a global media review pitting WPP against Publicis for billions in billings. WPP built a dedicated 5,000-person unit for Coca-Cola in 2021. The review is the clearest signal yet of how dependent agency models become on single-client relationships, and what happens when those clients reassess.
In 2021, WPP won the Coca-Cola global media account, described at the time as a $4 billion relationship. WPP built "Open X," a dedicated 5,000-person unit structured entirely around Coca-Cola's needs. The win was one of the largest single-account relationships in the history of the agency industry.
In 2025, Coca-Cola moved its North American media account, approximately $700 million in billings, to Publicis without a formal pitch. The account changed hands through a direct conversation between Coca-Cola and Publicis leadership.
In June 2026, Coca-Cola launched a global media review covering all markets except North America, Japan, and South Korea. The shortlisted parties: WPP and Publicis. The review process begins July 2026.
5,000 people. One client. Now a pitch review.
The Dependency Risk That Every Agency Knows and Ignores
Every agency principal knows the rule about client concentration: no single client should represent more than 20-25% of revenue. The logic is obvious: if that client leaves, the business cannot survive the revenue loss.
WPP's Open X unit violated this rule at a structural level. 5,000 people whose work was entirely defined by the requirements of a single client, within a single global network. The revenue concentration was not just at the agency level: it was at the unit level. Open X's entire existence depended on one relationship.
When Coca-Cola moved North American media to Publicis in 2025 without a pitch, it was a signal that the relationship was already in motion. The June 2026 global review is the formal acknowledgement of what the 2025 account move had already indicated: the relationship that justified 5,000 dedicated people is being reassessed.
How Publicis Won Without Pitching
The mechanism by which Publicis took the Coca-Cola North American account is more instructive than the outcome. There was no competitive pitch. The account moved through a direct conversation between Publicis CEO Arthur Sadoun and Coca-Cola marketing leadership.
This is the same mechanism Accenture uses to win business without appearing in a pitch process. Publicis has built the same capability at the holding company level: relationships deep enough with client leadership that accounts move before a formal review is triggered.
The LiveRamp acquisition ($2.2 billion, closed May 2026) is directly connected to this dynamic. LiveRamp provides identity resolution and data collaboration capabilities that give Publicis a proprietary data infrastructure advantage: the ability to demonstrate attribution and performance outcomes that competitors cannot replicate without the same infrastructure. When Coca-Cola CMO leadership evaluates which holding company to trust with their global media investment, the data infrastructure question is now as important as the creative and buying capabilities question.
What the Review Means for Independent Agencies
The WPP/Publicis/Coca-Cola triangle is a holding company story. Its direct applicability to independent agencies is limited. But the dynamics it illustrates are universal:
The client relationship that generates 30-40% of an agency's revenue is the client relationship that will either define the agency's trajectory or end it. The dependency is real at any scale.
The account that moves to a competitor without a pitch moves through a relationship, not a capabilities comparison. The agency that loses an account to a pitch usually loses because of performance. The agency that loses an account to a direct conversation between the client and a competitor loses because the competitor had a relationship the agency did not.
And the account that moved because of data infrastructure, because one party could demonstrate attribution outcomes the other could not, will increasingly become the template for why clients move accounts at every scale. The agency that can show which specific content or campaign produced a measurable commercial outcome for the client is increasingly defensible against the agency that can only show impressions, engagement rates, and brand sentiment.
The Review Outcome and What It Signals
The Coca-Cola global review decision, expected later in 2026, will be watched closely across the industry. If WPP retains the account, it signals that the 5,000-person dedicated unit model and the historical relationship have value that Publicis's data infrastructure advantage cannot overcome. If Publicis wins, it confirms that the infrastructure and data capability story now beats the relationship story at the highest level of global media buying.
For independent agencies, the more relevant signal is the fact that a $4 billion relationship is under review at all. No account is permanently secure. The agency that has not built the infrastructure, data, and relationship depth to defend its relationships is operating on borrowed time regardless of the relationship's current stability.
WPP built 5,000 people around one client. The lesson is not that dedicated units are wrong. The lesson is that relationships at that scale require continuous proof of value, and that proof of value in 2026 includes data and attribution capabilities that the relationship alone cannot substitute for.