Other Events On September 1, 2026, Telephone and Data Systems, Inc. (“TDS”) issued a press release announcing, among other things, that it is no longer pursuing the acquisition of the Common Shares of Array Digital Infrastructure, Inc. (“Array”) that it does not already own and has withdrawn its previously announced proposal. The press release is attached hereto as Exhibit 99.1.

of Form 8-K is being “furnished” and shall not be deemed “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that Section, nor will any such information or exhibits be deemed incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended, except as expressly set forth by specific reference in such filing.

Other Events Array Special Dividend On June 1, 2026, the Board of Directors of Array declared a special cash dividend to holders of Array’s Common Stock (“Common Stock”) and holders of Array’s Series A Common Stock (“Series A Common Stock”) of $11.00 per share payable in cash to the stockholders of record as of June 11, 2026. On June 1, 2026, TDS held 33,005,877 shares of Series A Common Stock and 37,782,826 shares of Common Stock. The payment date in respect of the dividend is scheduled for…

Completion of Acquisition or Disposition of Assets On June 1, 202 6, Array Digital Infrastructure, Inc. (f/k/a United States Cellular Corporation) (“Array”), a subsidiary of Telephone and Data Systems, Inc. (“TDS”), and certain subsidiaries of Array (collectively, “Sellers”) completed the previously announced sale of select spectrum assets to Verizon Communications Inc. (“Verizon”), pursuant to the terms of that certain License Purchase Agreement, dated as of October 17, 2024, between Sellers…

of Form 8-K is being “furnished” and shall not be deemed “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that Section, nor will any such information or exhibits be deemed incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended, except as expressly set forth by specific reference in such filing.

The filing describes a new executive bonus program and is not related to any management movement.

Senior Vice President – Strategy and Corporate Development — Joseph R. Hanley: Senior Vice President – Strategy and Corporate Development Joseph R. Hanley intends to retire, effective July 1, 2026.

of Form 8-K is being “furnished” and shall not be deemed “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that Section, nor will any such information or exhibits be deemed incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended, except as expressly set forth by specific reference in such filing.

Completion of Acquisition or Disposition of Assets On January 13, 202 6, Array Digital Infrastructure, Inc. (f/k/a United States Cellular Corporation) (“Array”), a subsidiary of Telephone and Data Systems, Inc. (“TDS”), and certain subsidiaries of Array (collectively, “Sellers”) completed the previously announced sale of select spectrum assets to New Cingular Wireless PCS, LLC (“AT&T”), pursuant to the terms of that certain License Purchase Agreement (the “Purchase Agreement”), dated as of No…

Other Events Array Special Dividend On January 13, 2026, th e Board of Directors of Array declared a special cash dividend to holders of Array’s Common Stock (“Common Stock”) and holders of Array’s Series A Common Stock (“Series A Common Stock”) of $10.25 per share payable in cash to the stockholders of record as of January 23, 202 6. On January 13, 2026, TDS held 33,005,877 s hares of Series A Common Stock and 37,782,608 shares of Common Stock. The payment date in respect of the dividend is…

Entry into a Material Definitive Agreement On December 8, 2025 (the “Effective Date”), Telephone and Data Systems, Inc. (“TDS”), entered into the Fourth Amendment (the “Amendment”) to First Amended and Restated Credit Agreement among TDS, Wells Fargo Bank, National Association, as administrative agent, and the other lenders thereto (the “Credit Agreement”). The Amendment amends the Credit Agreement in pertinent part as follows: • The maturity date is extended to the fifth anniversary of the E…

of Form 8-K is being “furnished” and shall not be deemed “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that Section, nor will any such information or exhibits be deemed incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended, except as expressly set forth by specific reference in such filing.

Termination of a Material Definitive Agreement On August 19, 2025, Telephone and Data Systems, Inc. (TDS) paid in full all indebtedness and other obligations outstanding under, and terminated: (a) the Amended and Restated Credit Agreement, dated as of July 30, 2021, among TDS, CoBank, ACB, as administrative agent, and the other lenders thereto (as amended from time to time); (b) the Senior Secured Credit Agreement, dated as of September 28, 2023, among TDS, Wells Fargo National Association, a…

of Form 8-K is being “furnished” and shall not be deemed “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that Section, nor will any such information or exhibits be deemed incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended, except as expressly set forth by specific reference in such filing.

Termination of a Material Definitive Agreement Array Securitization Facility Array maintained a securitization facility that permitted its subsidiary to borrow money by issuing notes backed by equipment installment plan receivables and was evidenced by: (a) the Amended and Restated Series 2017-VFN Note Purchase Agreement, dated as of October 23, 2020, among USCC Receivables Funding LLC, as transferor, USCC Master Note Trust, as issuer, USCC Services, LLC, as servicer, Array, as performance gu…

Other Events Exchange Offer and Consent Solicitation On August 1, 2025, T-Mobile announced that, as of 5:00 p.m., New York City time, on August 1, 2025, the aggregate principal amount of the four series of notes described below had been validly tendered and not validly withdrawn in connection with the previously announced offers to exchange (the “Exchange Offers”), pursuant to which T-Mobile offered to exchange all validly tendered and accepted 6.700% Senior Notes due 2033 (the “ Array 2033 N…

by reference. On August 1, 2025, pursuant to the terms of the Purchase Agreement and each of the agreements ancillary to the Purchase Agreement, the transactions contemplated by the Purchase Agreement (the “Transactions”) were consummated, as described below. As a result of the Transactions, among other things, Array’s wireless operations and select spectrum assets were sold to Buyer. The purchase price received by Array at the Closing pursuant to the Purchase Agreement, after giving effect t…

Entry into a Material Definitive Agreement Master License Agreement On August 1, 2025, in connection with the consummation of the transactions contemplated by the Purchase Agreement (the “Closing”), ADI Leasing Company, LLC, a subsidiary of Array (“Licensor”), and T-Mobile USA, Inc., a subsidiary of Buyer ( “Licensee” or “T-Mobile USA” and, together with Buyer, “T-Mobile”) , entered into the previously disclosed Master License Agreement (the “MLA”), pursuant to which, among other things, Lice…

Material Modification to Rights of Security Holders The information provided in

CEO — Laurent C. Therivel: The CEO is departing as part of a planned transaction with a named interim successor, constituting an orderly succession rather than a sudden loss.

CEO — James W. Butman: The CEO of a major subsidiary is stepping down from his executive role, which constitutes a significant management departure despite the planned transition.

Entry into a Material Definitive Agreement On June 25, 2025, United States Cellular Corporation (UScellular), subsidiary of Telephone and Data Systems, Inc., entered into a Fourth Amended and Restated Credit Agreement (Credit Agreement), as disclosed in UScellular’s Form 8-K dated June 25, 2025 , which Form 8-K is incorporated by reference herein. The terms and conditions of the UScellular Credit Agreement are described in such Form 8-K. A copy of the UScellular Credit Agreement is incorporat…

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant The disclosure set forth above under

Other Events On June 16, 2025, T-Mobile USA, Inc. (“T-Mobile USA” and together with T-Mobile US, Inc., “T-Mobile”) announced the preliminary results of the previously announced offers to exchange (the “Exchange Offers”), pursuant to which T-Mobile offered to exchange all validly tendered and accepted 6.700% Senior Notes due 2033 (the “USCC 2033 Notes”), 6.250% Senior Notes due 2069 (the “USCC 2069 Notes”), 5.500% Senior Notes due 2070 (March) (the “USCC March 2070 Notes”) and 5.500% Senior No…

CEO — James W. Butman: The CEO is retiring with a named successor (Kenneth Dixon) already identified, indicating an orderly succession rather than a sudden loss of leadership.