Company: MTZ
Filing Date: 2025-02-28
Form Type: S-3ASR
Source: 0001193125-25-042499
Chunk: 10

Company: MASTEC INC
Filing Date: 2025-02-28
Form: S-3ASR
Chunk 10
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 For purposes of this discussion, a “business combination” includes any:

| • |     | merger or consolidation of us with or into another corporation; |

| • |     | sale or lease of all or any substantial part of our property and assets; or |

| • |     | issuance of our securities in exchange for sale or lease to us of property and assets having an aggregate fair 
 market value of $1 million or more.                                                                            |

Our Amended and Restated Articles of Incorporation require at least 80% of the voting power of all of our outstanding shares entitled to vote in the election of directors, voting together as a single class, to vote in favor of a business combination with any person or entity that is directly or indirectly the holder of more than 10% of our outstanding voting stock in order for that transaction to be approved. This voting requirement may have the effect of delaying, deferring or preventing a change in control of us. However, this voting requirement is not applicable to business combinations if either:

| • |     | our Board of Directors has approved a memorandum of understanding with the other corporation with respect to the              
 transaction prior to the time that the other corporation became a holder of more than 10% of our outstanding voting stock; or |

| • |     | the transaction is proposed by a corporation of which we are the majority owner. |

Classified Board of Directors and Related Provisions. Our Amended and Restated Bylaws provide that the number of our directors will be established from time to time by a majority vote of our Board of Directors or our shareholders. Our Amended and Restated Bylaws also provide that our Board of Directors will be divided into three classes of directors, with each class having a number of directors as nearly equal as possible to each other class and that directors will serve for staggered three-year terms. As a result, one-thirdof our Board of Directors will be elected each year. These classified board provisions could prevent a party who acquires control of a majority of our outstanding voting stock from obtaining control of the Board of Directors until the second annual shareholders meeting following the date on which the acquirer obtains its controlling interest. Additionally, our Board of Directors’ Governance Principles include a director majority vote policy. The majority vote policy is applicable solely to uncontested elections, which are those elections in which the number of nominees for election is less than or equal to the number of directors to be elected. Under the majority vote policy, any 8

nominee for director who receives more “