
m/SIX
We are the UK’s fastest-growing media planning and buying agency. A progressive and entrepreneurial, international network that was born digital.
+44 20 7079 9800
m/SIX is one of the fastest growing media agencies. A progressive and entrepreneurial international media network that was born digital, the agency prides itself on its pioneering, energetic approach and honest culture. With over 40 offices worldwide, m/SIX is backed by WPP, the world's largest communications agency network, and embraces a unique ownership structure between The&Partnership and GroupM. This means we retain a flexible and entrepreneurial spirit, unencumbered by the rigid, legacy structures of traditional media agencies – whilst simultaneously being backed by the world’s largest media trading pool and advertising data lake. m/SIX specialises in driving business growth in the modern media landscape and helps clients transition from a world of certainty to a new world of adaptability. m/SIX are the architects of bespoke, dedicated, multi-disciplinary teams that closely partner client marketing operations. The agency firmly places tech and data at the heart of these teams: insight and strategy, activation and optimisation are all informed by the same source of customer truth.
Latest News
Aug. 04, 2026
Simple Mills Announces "Absolutely Nothing" in New National Campaign
Leading Better-for-You Snack Brand Offers Same Snacks, Now Non-UPF Verified™
Aug. 04, 2026
Prophet Acquires JBi Digital to Expand End-to-End Digital Capabilities
Acquisition adds website strategy, design and development expertise for clients across EMEA and North America
