Company: MTZ
Filing Date: 2025-06-26
Form Type: 11-K
Source: 0000015615-25-000062
Chunk: 2

Company: MASTEC INC
Filing Date: 2025-06-26
Form: 11-K
Chunk 2
---
 4a – Schedule of Delinquent Deposits of Participant Contributions for the year ended December 31, 2024 and Schedule H, line 4i – Schedule of Assets (Held at End of Year) as of December 31, 2024 have been subjected to audit procedures performed in conjunction with the audit of the Plan’s financial statements. The supplemental information is presented for the purpose of additional analysis and is not a required part of the financial statements but included supplemental information required by the Department of Labor’s Rules and Regulations for Reporting and Disclosure under the Employee Retirement Income Security Act of 1974. The supplemental information is the responsibility of the Plan’s management. Our audit procedures included determining whether the supplemental information reconciles to the financial statements or the underlying accounting and other records, as applicable, and performing procedures to test the completeness and accuracy of the information presented in the supplemental information. In forming our opinion on the supplemental information, we evaluated whether the supplemental information, including its form and content, is presented in conformity with the Department of Labor’s Rules and Regulations for Reporting and Disclosure under the Employee Retirement Income Security Act of 1974. In our opinion, the supplemental information is fairly stated, in all material respects, in relation to the financial statements as a whole.

/s/ BDO USA, P.C.

We have served as the Plan’s auditor since 2004.

Miami, Florida

June 26, 2025

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#### The MasTec, Inc. 401(k)

#### Retirement Plan

### STATEMENTS OF NET ASSETS AVAILABLE FOR BENEFITS
| Assets                             |     | December 31, 
 2024         |             |     | 2023 |             |
|:-----------------------------------|:----|:-------------|------------:|:----|:-----|------------:|
| Investments, at fair value         |     | $            | 710,029,515 |     | $    | 566,062,290 |
| Receivables:                       |     |              |             |     |      |             |
| Employer contributions             |     |              |   8,837,536 |     |      |   8,596,782 |
| Participant contributions          |     |              |     413,925 |     |      |     756,017 |
| Notes receivable from participants |     |              |  16,765,691 |     |      |  15,266,