Our visual captures the largest global agencies based on 2024 revenue/agency changes.
We break down the notable agencies (and networks) for the top 6 and list out the top 15 agencies’ revenue, change year-over-year and key information (HQ, worldwide scope, size, etc.)
Notable Changes from 2023 – 2024:
- Accenture Song surpassed WPP to become the world’s largest agency company in 2025, ending WPP’s tenure at the top from 2009 (based on 2008 revenue) through 2024 (based on 2023 revenue).
- Accenture Song, Deloitte Digital and Interpublic generated nearly $40 billion in 2024 revenue. Accenture Song’s No. 1 spot shows the rise of consulting firms in agency rankings, rivaling the scale of top holding companies.
- Currently ranked fourth by 2024 revenue, Omnicom is positioned to become the leading agency company pending its acquisition of sixth-ranked Interpublic in late 2025.
- Munich-based ServicePlan Group made the top 15 list, ranking at No. 15.
- Revenue for the world’s 25 biggest agency companies increased 3.6% in 2024 to a record $153 billion. The top five legacy agency holding companies—WPP, Publicis Groupe, Omnicom, Interpublic and Dentsu Group—accounted for nearly half ($72 billion) of that revenue (Ad Age).
- Despite revenue growth for top agency companies in 2024, automation, AI, and efficiency mandates drove leaner models. The five largest holding companies cut global staff by 2.2% (Ad Age).