S4 Capital plc, together with its subsidiaries, provides digital advertising, marketing, and technology services in the Americas, Europe, the Middle East, Africa, and the Asia Pacific. The company offers contents, campaigns, and assets for paid, social, and earned media, such as digital platforms and apps, as well as brand activations. It also provides campaign management analytics, creative production and ad serving, platform and systems integration, transition, and training and education services. In addition, the company offers digital transformation services in delivering digital product design, engineering, and delivery services. The company has a strategic partnership with Windsurf to create AI development environment. The company is headquartered in London, the United Kingdom.