The holding company wasn't quite ready to say so, but word has a way of getting out on Madison Avenue, and last week it did: Omnicom Media Group is merging Hearts & Science and Mediahub into a single agency that will operate under a new name, the latest move in what promises to be a prolonged exercise in corporate simplification.

The merger brings together two agencies with rather different pedigrees. Hearts & Science, which Omnicom built from scratch in 2016 to service Procter & Gamble, has positioned itself as a data-and-analytics operation from the start. Mediahub, which came to Omnicom through last year's acquisition of the Interpublic Group of Companies, made its name as what one consultant called "a creative-led media buying agency" — a distinction that may or may not survive the consolidation.

In a memo to staff, Florian Adamski, the global chief executive of Omnicom Media Group, described the combination as "remarkably complementary," a phrase that has launched a thousand mergers. He spoke of "challenger thinking" and "cultural creativity" and "meaningful global scale," though he was notably silent on the question of headcount.

(The question, of course, answers itself.)

According to Jay Pattisall, an analyst at Forrester, Omnicom's workforce grew by 60 percent when the Interpublic acquisition closed, and the company has already eliminated 7,200 positions since the end of 2025. Mr. Pattisall expects at least that many more cuts by 2027, given that 70 percent of the savings Omnicom has promised Wall Street are labor-related.

Ryan Kangisser, chief strategy officer at the consultancy Mediasense, said he expects further consolidation ahead. "On the surface, if you compare the number of brands within Omnicom versus Publicis versus WPP, they have too many brands," he said.

Tom Denford, a co-founder of the consultancy ID Comms, recalled sitting at Omnicom headquarters in February 2025 when John Wren, the company's chief executive, insisted that agency brands would not be retired. "In my view, the group doesn't need more than three media networks," Mr. Denford said, "so consolidation was inevitable."

Mr. Wren, it seems, has had a change of heart.

Original story published in Digiday: "Media Buying Briefing: Why Omnicom merged Mediahub and Hearts & Science - Digiday", by Michael Bürgi