Business Description

On August 1, 2025, United States Cellular Corporation changed its name to Array Digital Infrastructure, Inc. (Array). Array is used throughout this report even when referring to historical periods. On August 12, 2025, the Array Common Shares ticker symbol on the New York Stock Exchange changed to "AD". Array connects America through digital infrastructure by leasing tower space to tenants and providing ancillary services. As of December 31, 2025 , Array owns 4,450 towers in 19 states. Array also holds noncontrolling interests in primarily wireless operating companies and holds certain wireless spectrum licenses. As of December 31, 2025, Array is an 82.0%-owned subsidiary of Telephone and Data Systems, Inc. (TDS). Through July 31, 2025, Array provided wireless communication services; these operations and certain wireless spectrum licenses were disposed of on August 1, 2025, as discussed further below. Operating Strategy and Recent Developments Array is the fifth largest tower owner and operator of shared wireless communications infrastructure in the United States. With 4,450 cell towers, Array enables the deployment of 5G and other wireless technologies throughout the country. Array has a unique wireless carrier heritage and has owned and operated towers for over 40 years. This experience gives Array a robust understanding of the needs of its wireless customers and enables the delivery of exceptional service. Array has built a strong and focused organization that has been and will be relied upon as an efficient and cost-effective partner for colocation. Array’s strategy is to drive increased colocation on its portfolio of unique tower locations and support the delivery of connectivity to the communities in which it operates. Array’s operations are characterized by: • Array’s tenants lease space on Array's communications infrastructure, installing network equipment on Array tower structures. Revenues vary by tenant and are dependent on numerous factors, such as quantity of installed equipment, location of installed equipment on the tower structure and tower location, amongst others. Array has entered into long-term Master License Agreements (MLAs) with its largest customers, which ensures a defined lease term and defined lease escalators. Array generally experiences very limited tenant churn and high lease renewal rates driven by the high cost tenants incur to move sites as well as the potential lack of availability of suitable alternative tower structures. Array's largest tenants include T-Mobile, AT&T and Verizon. • Array's towers are generally located on leased land, though approximately 18% of the portfolio is located on deeded land or land where there is a perpetual easement. Additionally, over 65% of towers on leased land have a lease expiration date ten years or more in the future. Array's towers generally sit within a fenced compound that contains the tower itself as well as space for tenant equipment including shelters and generators. The average height of an Array tower is 260 feet, with tower heights ranging from 60 to 600 feet. Array's portfolio consists of monopole, self-support (lattice), and guyed towers. In addition to the tower structure, guyed towers have guy-wires that extend down to guy anchors. Substantially all of Array's towers have adequate tower capacity and ground space to accommodate additional tenants. • Demand for tower infrastructure continues to be high, driven primarily by continued growth in mobile data consumption. Array is in a unique position of having a lower tenancy rate than other tower operators due to the tower portfolio being part of the broader legacy wireless business prior to August 2025. This provides Array with ample remaining leasable vertical real estate in attractive rural, suburban and urban areas in the communities in which Array operates. • Array's direct tower operations costs consist of ground rent, tower maintenance, utilities, property tax and property insurance. Ground rent is the largest of these operating costs and is generally governed by long-term ground lease agreements with periodic escalators. • Array’s Selling, general and administrative expenses include employee related expenses, bad debts expense, consulting fees, and other general and administrative expenses. In 2025, Selling, general and administrative expenses also included significant costs associated with the wind down of the wireless operations that were not included in discontinued operations.…