Company: MTZ
Filing Date: 2025-02-28
Form Type: S-3ASR
Source: 0001193125-25-042499
Chunk: 36

Company: MASTEC INC
Filing Date: 2025-02-28
Form: S-3ASR
Chunk 36
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. Discharge, Defeasance and Covenant Defeasance Unless the terms of a series of debt securities provide otherwise, under the indentures, we may discharge some of our respective obligations to holders of any series of debt securities that:

| • |     | have been delivered to the trustee for cancellation; or |

| • |     | have not already been delivered to the trustee for cancellation and that either have become due and payable, will 
 become due and payable within one year, or are scheduled for redemption within one year.                          |

We can discharge these obligations when the securities have not already been delivered to the trustee for cancellation by irrevocably depositing with the trustee funds in the currency or currencies in which the debt securities are payable in an amount sufficient to pay and discharge the entire indebtedness on those debt securities, including principal of, and any premium, make-whole amount, interest and additional amounts on, the debt securities on and up to the date of such deposit, or, if the debt securities have become due and payable, on and up to the stated maturity or redemption date, as the case may be (Section 401). In addition, if the terms of the debt securities of a series permit us to do so, we may elect either of the following:

| • |     | to defease and be discharged from any and all obligations with respect to the debt securities, except certain 
 obligations set forth in Section 1402 (Section 1402);                                                         |

| • |     | pay any additional amounts upon the occurrence of several particular tax and other events; |

| • |     | pay the fees, expenses and indemnitees of the trustee; |

| • |     | register the transfer or exchange of the debt securities; |

| • |     | replace temporary or mutilated, destroyed, lost or stolen debt securities; |

| • |     | maintain an office or agency for the debt securities; and |

| • |     | hold monies for payment in trust; or |

| • |     | to be released from our obligations with respect to the debt securities under sections of the applicable                                                
 indenture described under “Certain Covenants” or, if permitted by the terms of the debt securities, our obligations with respect to any other covenant. |

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If we choose to be released from our respective obligations under the covenants, any failure to comply with any of the obligations imposed on us by the covenants will not constitute a default or an event of default with respect