Three.
TelecommunicationsEngland, United Kingdom5001-10000 Employees
Three UK operates a large mobile network in the United Kingdom, based in Reading, England, and was founded in 2003 with the aim of challenging the mobile industry. The network covers 99% of the UK outdoor population and handles a substantial share of mobile data traffic. The operator holds more 5G-exclusive spectrum than any other UK network, enabling enhanced experiences as 5G is deployed. Beyond connectivity, Three UK maintains sponsorships with Chelsea FC’s men’s and women’s teams and Channel 4’s Gogglebox. It is also a partner of Samaritans, supporting efforts to connect people with emotional support. In 2025, the company announced a partnership with Airtime Rewards to offer customers money off their monthly bill.