Company: UZF
Filing Date: 2025-04-09
Form Type: 10-K/A
Source: 0000821130-25-000027
Chunk: 0

Company: ARRAY DIGITAL INFRASTRUCTURE, INC.
Filing Date: 2025-04-09
Form: 10-K/A
Chunk 0
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### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION

#### Washington, D.C. 20549

#### FORM 10-K/A

#### Amendment No. 1
(Mark One)

| ☒ |     | ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 |

#### For the fiscal year ended December 31, 2024

#### OR
| ☐ |     | TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 |
|   |     | For the transition period from                                    to                     |

#### Commission file number 001-09712

### UNITED STATES CELLULAR CORPORATION
<div align='center'>(Exact name of Registrant as specified in its charter)</div>

| Delaware                                                       |     | 62-1147325                       |
| (State or other jurisdiction of incorporation or organization) |     | -IRS Employer Identification No. |

#### 8410 West Bryn Mawr, Chicago, Illinois 60631
<div align='center'>(Address of principal executive offices) (Zip code)

Registrant's telephone number, including area code: (773) 399-8900</div>

Securities registered pursuant to Section 12(b) of the Act:

| Title of each class         |     | Trading Symbol |     | Name of each exchange on which registered |
| Common Shares, $1 par value |     | USM            |     | New York Stock Exchange                   |
| 6.25% Senior Notes Due 2069 |     | UZD            |     | New York Stock Exchange                   |
| 5.50% Senior Notes Due 2070 |     | UZE            |     | New York Stock Exchange                   |
| 5.50% Senior Notes Due 2070 |     | UZF            |     | New York Stock Exchange                   |

Securities registered pursuant to Section 12(g) of the Act: None

| Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.                                                                                                                                                                                                                                  |     | Yes |     | ☒ |     | No |     | ☐ |
| Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.                                                                                                                                                                                                                             |     |