Company: MTZ
Filing Date: 2025-02-28
Form Type: S-3ASR
Source: 0001193125-25-042499
Chunk: 22

Company: MASTEC INC
Filing Date: 2025-02-28
Form: S-3ASR
Chunk 22
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ance provisions of the indenture, as described 
 below under “Discharge, Defeasance and Covenant Defeasance”;                                                   |

| • |     | any applicable United States federal income tax consequences, including whether and under what circumstances we                                                                                                                                        
 will pay any additional amounts, as contemplated in the indenture on the debt securities, to any holder who is not a United States person in respect of any tax, assessment or governmental charge withheld or deducted and, if we will pay additional 
 amounts, whether, and on what terms, we will have the option to redeem the debt securities in lieu of paying the additional amounts;                                                                                                                   |

| • |     | the provisions, if any, relating to any security provided for the debt securities of the series; |

| • |     | any other covenant or warranty included for the benefit of the debt securities of the series; |

| • |     | any proposed listing of the debt securities on any securities exchange or market; and |

| • |     | any other terms of the debt securities or of any guarantees issued in connection with the debt securities not 
 inconsistent with the provisions of the indenture (Section 301).                                              |

The debt securities may be Original Issue Discount Securities or Indexed Securities (which are debt securities that provide for the payment of less than the principal amount thereof upon acceleration of maturity, or maturity, as applicable) and may be subject to special U.S. federal income tax, accounting and other considerations, which considerations will be described in the applicable prospectus supplement. 17

We may issue debt securities from time to time, with the principal amount payable on any
principal payment date, or the amount of interest payable on any interest payment date, to be determined by reference to one or more currencies or currency exchange rates, commodity prices, equity indices or other factors. Holders of debt securities
with these features may receive payment of a principal amount on any principal payment date, or a payment of interest on any interest payment date, that is greater than or less than the amount of principal or interest otherwise payable on the
applicable dates, depending upon the value on those dates of the applicable currencies or currency exchange rates, commodity prices, equity indices or other factors.

Information as to the methods for determining the amount of principal or interest payable on any date, the currencies or currency exchange
rates, commodity prices, equity indices or other factors to which the amount payable on that date is linked and additional tax considerations will be included in the applicable prospectus supplement. All debt securities of