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. 14, 2026

Brandon and Avelo Airlines Launch "If You Know, You Avelo," Repositioning Regional Airports as the Smarter Way to Fly

The agency's first work as creative and media AOR launches across five origin markets

Aug. 14, 2026

Serviceplan's First Campaign for Uber Plays with Words, Wit and Well-Worn Habits

Uses documentary-style storytelling, cinematic observation, and everyday moments to position Uber as a relevant choice for daily life