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Discontinued Operations | 3 Months Ended
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Mar. 31, 2026
Discontinued Operations and Disposal Groups [Abstract] |
Discontinued operations | Note 2 Discontinued Operations On August 1, 2025, Array sold its wireless operations and select spectrum assets to T-Mobile US, Inc. (T-Mobile) pursuant to a Securities Purchase Agreement (Securities Purchase Agreement). TDS met the criteria to classify the wireless operations and select spectrum assets sold to T-Mobile as discontinued operations following the receipt of regulatory approval and subsequent closing of the transaction, all of which occurred during the three months ended September 30, 2025. 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 March 31, 2026, Array recorded an estimated purchase price true-up due to T-Mobile of $20.2 million, which is classified as Current liabilities of discontinued operations in the Consolidated Balance Sheet. Certain licenses included in the T-Mobile transaction did not transfer to T-Mobile at the time of close and are subject to FCC approval. At closing, a $16.7 million deferral of the purchase price was recorded related to these spectrum licenses, which is classified as Other deferred liabilities and credits in the Consolidated Balance Sheet. Array also may incur significant decommissioning costs for certain equipment and recorded a liability of $65.8 million as of March 31, 2026, which is classified as Other deferred liabilities and credits in the Consolidated Balance Sheet. During the three months ended March 31, 2026, TDS recognized a loss on the transaction of $0.9 million. On August 1, 2025, a Short-Term Spectrum Manager Lease Agreement and Short-Term Spectrum Manager Sublease Agreements became effective, which provide T-Mobile with an exclusive license to use certain Array spectrum assets and leases at no cost for up to one year from closing for the sole pur pose of providing continued, uninterrupted service to customers. The portion of the purchase price allocated to the use of this spectrum was $149.3 million based on an estimate for fair market value and will be recognized to Short-term imputed spectrum lease income in the continuing operations Consolidated Statement of Operations over the one year term. As of March 31, 2026, the remaining balance of the deferred purchase price is $43.6 million and is classified as Customer deposits and deferred revenues in the Consolidated Balance Sheet. See Note 12 — Subsequent Events for additional information. Following the close of the transaction, TDS entered into a transition services agreement (TSA) with T-Mobile to provide ongoing services and support. TDS recognized $4.2 million of income related to the TSA in Other, net in the Consolidated Statement of Operations in 2026. Net income (loss) from discontinued operations in the Consolidated Statement of Operations consists of the following:
| Three Months Ended March 31, |  |  |  |
| 2026 |  | 2025 |  |  |  |  |  |
(Dollars in thousands) |  |  |  |  |  |  |  |  |
Operating revenues |  |  |  |  |  |  |  |  |
Service | $ | — |  |  | $ | 713,934 |  |  |  |  |  |  |
Equipment sales | — |  |  | 150,090 |  |  |  |  |  |  |
Total operating revenues | — |  |  | 864,024 |  |  |  |  |  |  |
Operating expenses |  |  |  |  |  |  |  |  |
System operations (excluding Depreciation, amortization and accretion reported below) | 509 |  |  | 158,946 |  |  |  |  |  |  |
Cost of equipment sold | — |  |  | 175,787 |  |  |  |  |  |  |
Selling, general and administrative | 1,518 |  |  | 308,418 |  |  |  |  |  |  |
Depreciation, amortization and accretion | — |  |  | 150,535 |  |  |  |  |  |  |
(Gain) loss on asset disposals, net | — |  |  | 1,719 |  |  |  |  |  |  |
(Gain) loss on sale of business and other exit costs, net | 889 |  |  | — |  |  |  |  |  |  |
Total operating expenses | 2,916 |  |  | 795,405 |  |  |  |  |  |  |
Operating income (loss) | (2,916) |  |  | 68,619 |  |  |  |  |  |  |
Other income (expense) |  |  |  |  |  |  |  |  |
Interest expense | (314) |  |  | (35,985) |  |  |  |  |  |  |
Other, net | — |  |  | (6) |  |  |  |  |  |  |
Total other expense | (314) |  |  | (35,991) |  |  |  |  |  |  |
Income (loss) before income taxes | (3,230) |  |  | 32,628 |  |  |  |  |  |  |
Income tax expense (benefit) | (841) |  |  | 16,457 |  |  |  |  |  |  |
Net income (loss) from discontinued operations | $ | (2,389) |  |  | $ | 16,171 |  |  |  |  |  |  |

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- Definition The entire disclosure related to a disposal group. Includes, but is not limited to, a discontinued operation, disposal classified as held-for-sale or disposed of by means other than sale or disposal of an individually significant component. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 205 -SubTopic 20 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/205-20/tableOfContent Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 360 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/360/tableOfContent + Details
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