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Omnicom agencies

Omnicom completed its acquisition of Interpublic on November 26, 2025. That changes how buyers should read older agency lists: IPG and Omnicom are no longer separate parent companies. It does not mean every former IPG agency became the same operating business or that every historical brand name remains unchanged. Use the current agency profile and the group’s own information to establish which business you are evaluating.

59 agencies in the directory belong to Omnicom. Each profile links to the page its membership was read on, starting from Omnicom’s own site. This is the published Agency Field Guide subset, not the group’s complete corporate roster.

Before you shortlist

Check the operating team, not just the ownership label.

When an agency has been through a change of ownership or organization, ask who will lead the account now. Confirm the current agency name, the contracting entity, the relevant offices and the people attached to the work. An excellent case study from an earlier structure is useful only if the proposal explains how that capability is available today.

If your shortlist contains several Omnicom agencies, discuss how competitive information and staffing will be handled. Shared ownership does not tell you whether the pitch teams overlap. For a combined group offer, require a clear account lead and a delivery plan that identifies each participating business. Treat the acquisition as context for due diligence, rather than a verdict on the quality of any individual agency.

What should you ask Omnicom agencies?

  • Is the team behind this case study available under the agency’s current structure?
  • Do any shortlisted agencies share proposed staff or decision makers?

Use the case study checklist to check the work behind the pitch, and the agency interview guide to compare the answers.

Agencies in Omnicom

Explore the group’s agencies listed in Agency Field Guide.