Telephone and Data Systems, Inc. (TDS) is a diversified telecommunications company based in the United States. The company operates primarily through two main segments: TDS Telecom and Array Digital Infrastructure. TDS Telecom delivers high-speed fiber internet, video entertainment, and digital voice services to residential and commercial customers across various urban, suburban, and rural markets. Array Digital Infrastructure, formerly known as United States Cellular Corporation (UScellular), focuses on leasing telecommunication tower space to tenants and managing wireless spectrum licenses following the 2025 sale of its wireless operations to T-Mobile. Headquartered in Chicago, Illinois, TDS is controlled by the founding Carlson family through a dual-class share structure.
