Company: MTZ
Filing Date: 2025-02-28
Form Type: S-3ASR
Source: 0001193125-25-042499
Chunk: 24

Company: MASTEC INC
Filing Date: 2025-02-28
Form: S-3ASR
Chunk 24
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 prospectus supplement at the corporate trust office of the trustee, initially, U.S. Bank Trust Company, National Association–Corporate Trust Services, 60 Livingston Avenue,
St. Paul, MN 55107. At our option, however, payment of interest may be made by check mailed to the address of the person entitled to the interest payment as it appears in the security register for the series or by wire transfer of funds to that
person at an account maintained within the United States (Sections 301, 305, 307 and 1002). We may at any time designate additional paying agents or rescind designation of any paying agents or approve a change in the office through which any

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paying agent acts, except that we will be required to maintain a paying agent in each place of payment for any series. All monies that we pay to a paying agent for the payment of any principal of, or any premium, make-whole amount, interest or additional amounts on, any debt security which remains unclaimed at the end of two years after that payment became due and payable will be repaid to us. After that time, the holder of the debt security will be able to look only to us for payment (Section 1003). Any interest that we do not punctually pay on any interest payment date with respect to a debt security will cease to be payable to the holder on the applicable regular record date and may either:

| • |     | be paid to the holder at the close of business on a Special Record Date for the payment of defaulted interest, to 
 be determined by the trustee (Sections 101 and 307); or                                                           |

| • |     | be paid at any time in any other lawful manner, as more fully described in the indentures. |

Subject to certain limitations imposed upon debt securities issued in book-entry form, debt securities of any series will be exchangeable for other debt securities of the same series and of the same total principal amount and authorized denomination upon the surrender of the debt securities at the corporate trust office of the trustee. In addition, subject to certain limitations imposed upon debt securities issued in book-entry form, the debt securities of any series may be surrendered for conversion, transfer or exchange at the corporate trust office of the trustee. Every debt security surrendered for redemption, transfer or exchange must be duly endorsed or accompanied by a written instrument of transfer. There will be no service charge for any transfer or exchange of any debt securities, but we may require holders to pay any tax or other governmental charge payable