Company: MTZ
Filing Date: 2025-06-26
Form Type: 11-K
Source: 0000015615-25-000062
Chunk: 11

Company: MASTEC INC
Filing Date: 2025-06-26
Form: 11-K
Chunk 11
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 and $16,704, respectively, were not remitted within the appropriate time period by the Company. These transactions constitute prohibited transactions as defined by ERISA. The Company is aware of the occurrence and has taken the appropriate steps to correct the situation. Estimated interest assessed on these amounts were $577 and $76, for the years ended December 31, 2024 and 2023, respectively. The Company has chosen to correct this without use of the Voluntary Fiduciary Contribution Program. Furthermore, the Company does not believe that these prohibited transactions will have a material impact on the accompanying financial statements and supplemental schedules.

NOTE J — SUBSEQUENT EVENTS

Effective January 1, 2025, the Plan adopted the SECURE Act provisions to offer an increased catch-up contribution limit and qualified disaster recovery distributions to eligible participants.

The Plan evaluated subsequent events through June 26, 2025, the date the financial statements were available to be issued.

<div align='center'>11</div>

#### The MasTec, Inc.

#### 401(k) Retirement Plan

#### Employer Identification Number 65-0829355

#### Plan # 002

#### SCHEDULE H, LINE 4a-

### SCHEDULE OF DELINQUENT DEPOSITS OF PARTICIPANT CONTRIBUTIONS

#### Year Ended December 31, 2024
|      |     | Total that Constitute Nonexempt Prohibited Transactions 
 Check here if Late Participant Loan                     
 Repayments are included:                                
 ☐                                                       |         |     | Contributions 
 Not Corrected |   |     | Contributions     
 Corrected Outside 
 VFCP*             |         |     | Contributions 
 Pending       
 Correction in 
 VFCP*         |   |     | Total Fully     
 Corrected Under 
 VFCP* and PTE** 
 2002-51         |   |
|:-----|:----|:--------------------------------------------------------|--------:|:----|:--------------|:--|:----|:------------------|--------:|:----|:--------------|:--|:----|:----------------|:--|
| 2023 |     | $                                                       |  16,704 |     | $             | — |     | $                 |  16,704 |     | $             | — |     | $               | — |
| 2024 |     |                                                         | 173,839 |     |               | — |     |                   | 173,839 |     |               |