ARRAY DIGITAL INFRASTRUCTURE, INC.

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". The following Management’s Discussion and Analysis (MD&A) should be read in conjunction with the audited consolidated financial statements and notes of Array for the year ended December 31, 2025, and with the description of Array’s business included herein. Certain numbers included herein are rounded to thousands or millions for ease of presentation; however, certain calculated amounts and percentages are determined using the unrounded numbers.

This report contains statements that are not based on historical facts, which may be identified by words such as “believes,” “anticipates,” “estimates,” “expects,” “plans,” “intends,” “projects,” “will” and similar expressions. These statements constitute and represent “forward looking statements” as this term is defined in the Private Securities Litigation Reform Act of 1995. Such forward looking statements involve known and unknown risks, uncertainties and other factors that may cause actual results, events or developments to be significantly different from any future results, events or developments expressed or implied by such forward looking statements. See the disclosure under the heading Private Securities Litigation Reform Act of 1995 Safe Harbor Cautionary Statement elsewhere in this report for additional information.

The accounting policies of Array conform to accounting principles generally accepted in the United States of America (GAAP). However, Array uses certain “non-GAAP financial measures” in the MD&A. A discussion of the reasons Array determines these metrics to be useful and reconciliations of these measures to their most directly comparable measures determined in accordance with GAAP are included in the disclosure under the heading Supplemental Information Relating to Non-GAAP Financial Measures within the MD&A of this report.

Overview

Array connects America through digital infrastructure by leasing tower space to tenants and providing ancillary services. 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.

Towers

Array seeks to grow tower revenue primarily through increasing colocations on existing towers and amendments to existing colocations. Array seeks to provide unique tower locations, attractive terms and streamlined implementation to wireless network operators, internet service providers, government and public safety agencies, broadcast and media companies, and other businesses. As of December 31, 2025, Array owns 4,450 towers in 19 states.

Noncontrolling interest investments

Array holds noncontrolling interests in primarily wireless operating companies that generate material amounts of income and cash distributions. These entities primarily consist of wireless entities managed by Verizon and AT&T. The noncontrolling wireless entities managed by Array also sold their wireless operations to T-Mobile in separate transactions on August 1, 2025, coterminous with the sale of Array's consolidated wireless operations sold to T-Mobile on the same date. Going forward, these noncontrolling entities that are managed by Array consist primarily of tower operations.

Retained spectrum

Array holds wireless spectrum that is subject to sale agreements described below, and additional wireless spectrum not subject to pending sale agreements that Array seeks to opportunistically monetize. As of December 31, 2025, the book value of the remaining spectrum not subject to pending sale agreements was $1,584.8 million and includes primarily C-Band spectrum. Array incurred costs related to the management of the retained spectrum of $3.8 million as a standalone tower company during the six months ended December 31, 2025.

Strategic Alternatives Review

On August 1, 2025, Array sold its wireless operations and select spectrum assets to T-Mobile US, Inc. (T-Mobile) under a Securities Purchase Agreement (Securities Purchase Agreement). Total consideration received was $4,293.8 million after adjustments which included a combination of $2,628.8 million in cash proceeds and $1,665.0 million in debt assumed by T-Mobile through the preliminary results of an exchange offer made to Array's debtholders, which subsequently closed on August 5, 2025. The final cash proceeds are subject to adjustment according to the terms and conditions of the Securities Purchase Agreement. As of December 31, 2025, Array recorded an estimated purchase price true-up due to T-Mobile of $20.2 million. At closing, a $16.7 million deferral of the purchase price was recorded related to certain spectrum licenses included in the transaction that did not transfer to T-Mobile and are subject to FCC approval. In addition, at closing, Array and T-Mobile entered into a Short-Term Spectrum Manager Lease Agreement and Short-Term Spectrum Manager Sublease Agreements which provide T-Mobile with an exclusive license to use certain Array spectrum assets and leases at no cost for up to one-year for the sole purpose of providing continued, uninterrupted service to customers. Further, at closing, Array and T-Mobile entered into a Master License Agreement (MLA), pursuant to which, among other things, T-Mobile has agreed to license from Array space on towers owned by Array. The wireless operations and select spectrum assets sold to T-Mobile are presented as discontinued operations throughout this report. See Note 2— Discontinued Operations in Notes to Consolidated Financial Statements for additional information.

In addition to the sale of Array's wireless operations and select spectrum assets sold to T-Mobile pursuant to the Securities Purchase Agreement, Array also separately entered into the following agreements to sell spectrum license assets.

1 These license transactions remain subject to regulatory approval and other customary closing conditions, and in the case of the sale to Verizon, the termination of the T-Mobile Short-Term Spectrum Manager Lease Agreement. See Note 6 — Acquisitions and Divestitures in the Notes to Consolidated Financial Statements for additional information.

2 Following the close of the transaction on January 13, 2026, Array expects to record a book gain on the transaction of approximately $155.0 million ($116.0 million net of tax expense) during the first quarter of 2026.

The strategic alternatives review process is ongoing as Array works toward closing the Verizon and T-Mobile spectrum transactions signed during 2024 and 2025, and seeks to opportunistically monetize its remaining spectrum assets that are not subject to executed agreements.

Array incurred third-party expenses related to the announced transactions and strategic alternatives review of $2.4 million, $21.5 million and $8.3 million for the years ended December 31, 2025, 2024, and 2023, respectively, which are included in Selling, general and administrative (SG&A) expenses for continuing operations.