Aegis Group
Aegis Group was a publicly traded holding company for a global group of media specialists, purchasing advertising space across newspapers, magazines, television, radio, and other outlets, while also providing extensive audience forecasting research.
Last updated Oct 5, 2026 by the ATDb Editorial Team
AI-drafted from public sources9 sources cited
At a glance
About
One of the world's largest independent media services groups prior to its acquisition by Dentsu in 2013, with a significant global presence in media buying, planning, and market research.
Aegis Group was a publicly traded holding company for a global group of media specialists, purchasing advertising space across newspapers, magazines, television, radio, and other outlets, while also providing extensive audience forecasting research. Founded in 1989 by Peter Scott as a spin-off of the WCRS media buying division — itself centered on the French media business Carat — the company was officially renamed Aegis Group in 1990. Under Scott's leadership, Aegis steered away from full-service advertising toward specialization in media planning and buying, ultimately selling all remaining interests in full-service advertising in September 1992. Its media portfolio included brands such as Carat, Vizeum, Isobar, iProspect, and Posterscope, with capabilities spanning digital media planning and buying as well as a range of digital marketing services. Through iProspect, Aegis also built search engine optimization expertise, advising clients on maximizing organic search presence and expanding that capability globally. Aegis was acquired by Japanese advertising company Dentsu for £3.16 billion in a transaction completed on March 26, 2013, after which it was folded into the newly established Dentsu Aegis Network. Source 1: encyclopedia.com — Aegis Group plc Source 2: wikipedia.org — Dentsu International Source 3: thedrum.com — Aegis Group agrees to £55.2m deal for Chinese digital ... Source 4: adtechdaily.com — Isobar Acquires Search Engine Marketing Firm Aposition in ...
Business model
Agency
Target market
Enterprise
What they offer
Carat
One of the world's largest media buying and planning agency networks, serving major global advertisers.
Vizeum
Full-service media agency focused on integrated media planning and buying.
Isobar
Global digital marketing and communications network.
Synovate
Global market research division providing consumer insights and data (sold to Ipsos in 2011).
Posterscope
Out-of-home media specialist agency.
Aegis Media
Umbrella brand for the group's media agency operations.
Key features
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Tech & specs
Technology stack
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Deployment
API
No
- 2013Acquired by Dentsu Inc.Still operating as part of Dentsu Group Inc.