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

Oct. 23, 2026

Morrisons Fresh Produce Gets a Monstrous Makeover for Halloween in new OOH campaign by Leo UK

Using simple still-life photography, Morrisons Market Street produce becomes a cast of Halloween monsters

Oct. 23, 2026

Florence Signs Director Jake Vriez Elaar

The New York-based filmmaker joins Florence’s U.S. roster, bringing a Midwestern eye for humor and humanity to advertising, music and narrative work