UM London
Advertising ServicesEngland, United Kingdom51-200 Employees
UM London is a global media agency within the Advertising Services sector and part of the Omnicom Media network. It is based in London, England, and operates in more than 100 countries, supported by a large international team. The firm positions its work as driving brand growth by combining human insight with an understanding of how Brand Patterns influence audience response. Its client roster includes American Express, General Mills, Emirates, Kenvue, Levi Strauss & Co, Enterprise Holdings, Upfield, and Mattel. In 2026, leadership changes at UM UK included appointing Sarah Nugent as CEO, reflecting ongoing executive moves within the network.