Sumo Group Limited is a British video game holding company based in Sheffield. It was formed in December 2017 as the parent company for Sumo Digital and Atomhawk, followed by its initial public offering on the London Stock Exchange later that month. Sumo Group's other subsidiaries are Pipeworks Studios (acquired in September 2020) and Secret Mode, a publisher established in March 2021. After purchasing a minority stake in Sumo Group in November 2019, Tencent wholly acquired the company in January 2022.