Business Description

Telephone and Data Systems, Inc. (TDS) provides high-quality communications services to customers through its wholly-owned subsidiary TDS Telecommunications LLC (TDS Telecom) with 1.1 million broadband, video, voice and wireless connections at December 31, 2025. TDS leases tower space to tenants and provides ancillary services, holds noncontrolling interests in primarily wireless operating companies and holds certain wireless spectrum licenses through its majority-owned subsidiary Array Digital Infrastructure, Inc. (Array). As of December 31, 2025, TDS owned 82.0% of the combined total of the outstanding Common Shares and Series A Common Shares of Array and controlled 95.9% of the combined voting power of both classes of Array common stock. TDS Common Shares trade under the ticker symbol “TDS” on the New York Stock Exchange (NYSE). Array Common Shares trade on the NYSE under the ticker symbol “AD.” Under listing standards of the NYSE, TDS is a “controlled company” as such term is defined by the NYSE. TDS is a controlled company because over 50% of the voting power for the election of a majority of the directors of TDS is held by the trustees of the TDS Voting Trust. On August 1, 2025, United States Cellular Corporation changed its name to Array Digital Infrastructure, Inc.. Array is used throughout this report even when referring to historical periods. TDS has two