Observed Signal · Aug 28, 2026 · Agency Launch · Source: Meedia · Impact: 3/5 · Sentiment: Neutral
Agency Consolidation Market: Omnicom Combines Hearts & Science and Mediahub
Omnicom Media has merged its Hearts & Science and Mediahub agencies into a new global network called Hearts United. The agency will launch across 40 markets with an estimated billing volume of about $9.1 billion. Leadership appointments include Florian Adamski (Omnicom Media CEO) framing the move around client growth, Ross Jenkins leading EMEA, and Dominik Scholta heading the German business. Omnicom presented the consolidation as a growth and AI-integration play, while observers frame it as further consolidation following Omnicom’s takeover of Interpublic. Reported historic billing growth for the two agencies and new-business wins underpin the rollout.
Major holding-company consolidation creates a large global agency network (reported $9.1B billing), impacts client-agency structures and signals further consolidation in the agency market after Omnicom’s acquisition of Interpublic.
Key Takeaways & Evidence Grounding
- Omnicom Media merged Hearts & Science and Mediahub into a new global agency network called Hearts United.
- Hearts United launches in 40 markets with a reported billing volume of about $9.1 billion.
- Leadership: Florian Adamski (Omnicom Media CEO) announced the move; Ross Jenkins will lead EMEA; Dominik Scholta will lead the German Hearts United business.
- Between 2021 and 2025 Hearts & Science increased billing by 50% and Mediahub by 33%, according to Omnicom.
- COMvergence ranking and Marketing-Interactive figures cite Hearts United’s new-business wins: $294M net in the US, $567M worldwide, and $242M in EMEA.
Connected Companies & Entities
12 Entities mappedHearts & Science
Media agency for planning, buying and measuring cross-channel campaigns.
“Hearts United is intended to combine the strengths of Hearts & Science and Mediahub, with Hearts & Science known in particular for data-driv...”
UM
Global media agency for planning, buying, and strategic intelligence.
“Alongside OMD, PHD and Hearts & Science, the Omnicom group now also includes UM, Initiative and Mediahub....”
PHD
Media agency delivering planning, buying, analytics and commerce strategy.
“Alongside OMD, PHD and Hearts & Science, the Omnicom group now also includes UM, Initiative and Mediahub....”
Omnicom
Global advertising holding company with media, commerce, PR and data capabilities.
“After the roughly $13 billion acquisition of Interpublic, Omnicom (and Omnicom Media) has a significantly larger agency portfolio....”
MEEDIA
Marketplace for licensing creator-owned images and video content.
“MEEDIA reported on the consolidation and previously described the fusion in July as an 'aftershock' of the Omnicom-IPG deal....”
Initiative
Media agency for planning, buying and performance-led brand growth.
“Alongside OMD, PHD and Hearts & Science, the Omnicom group now also includes UM, Initiative and Mediahub....”
Interpublic Group (IPG)
Agency holding company combining media, creative, data and marketing platforms.
mediasense
Independent consultancy for marketing organisation, governance and effectiveness.
“Mediasense strategy chief Ryan Kangisser commented that he expects further changes on the way....”
OMD
Global media agency for planning, buying and campaign strategy.
“Alongside OMD, PHD and Hearts & Science, the Omnicom group now also includes UM, Initiative and Mediahub....”
Acxiom
Enterprise identity, data and audience infrastructure for marketing.
Digiday
B2B trade publisher for media, marketing and retail professionals.
“Digiday described the step as part of a possible simplification of the agency offering....”
COMvergence
Global media agency benchmarking and market intelligence platform.
“According to the real-time ranking by COMvergence, Hearts United is currently number one in new business in the USA and third worldwide and ...”
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