MTZ

SEC source: 0000015615-23-000052 · wk-form4_1700257075.xml · nonDerivative · entry 2

Parker Ava L · CIK 0001526207 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,579

F1 · shares: Shares disposed of represent shares withheld by the Issuer to pay taxes due upon vesting of restricted stock.

SEC source: 0000015615-23-000052 · wk-form4_1700257075.xml · nonDerivative · entry 1

Parker Ava L · CIK 0001526207 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,743

SEC source: 0000015615-23-000041 · wk-form4_1699306520.xml · nonDerivative · entry 1

Apple Robert E · CIK 0001382697 · COO

10b5-1 filing: No plan indicated

Ownership: Indirect · By 401(k) Plan

Disclosed balance after: 11,945.5809

SEC source: 0000015615-23-000045 · wk-form4_1699306927.xml · nonDerivative · entry 1

DiMarco Paul · CIK 0001965258 · CFO

10b5-1 filing: No plan indicated

Ownership: Indirect · By 401(k) plan

Disclosed balance after: 9,895.3462

SEC source: 0000015615-23-000043 · wk-form4_1699306762.xml · nonDerivative · entry 1

de Cardenas Alberto · CIK 0001250037 · EVP, General Counsel

10b5-1 filing: No plan indicated

Ownership: Indirect · By 401(k) Plan

Disclosed balance after: 7,966.3728

SEC source: 0000015615-24-000039 · wk-form4_1712176535.xml · nonDerivative · entry 1

Love Timothy Michael · CIK 0001345434 · CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,125

SEC source: 0001209191-23-051970 · doc4.xml · nonDerivative · entry 1

Love Timothy Michael · CIK 0001345434 · CAO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 10,525

F1 · shares: Sale pursuant to a 10b5-1 plan adopted on December 20, 2022 to cover tax withholding obligations in connection with the vesting of restricted stock. The sale was to satisfy tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary transaction by the reporting person.

SEC source: 0001209191-23-051965 · doc4.xml · nonDerivative · entry 1

DiMarco Paul · CIK 0001965258 · CFO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 16,620

F1 · shares: Sales pursuant to a 10b5-1 plan adopted on December 16, 2022 to cover tax withholding obligations in connection with the vesting of restricted stock. The sales were to satisfy tax withholding obligations to be funded by "sell to cover" transactions and do not represent discretionary transactions by the reporting person.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in two separate transactions with prices ranging from $71.3500 to $71.4300 for an average weighted sales price of $71.3505. The reporting person undertakes to provide the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

SEC source: 0001209191-23-046312 · doc4.xml · nonDerivative · entry 2

Parker Ava L · CIK 0001526207 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,000

F1 · shares: Shares disposed of represent shares withheld by the Issuer to pay taxes due upon vesting of restricted stock.

SEC source: 0001209191-23-046312 · doc4.xml · nonDerivative · entry 1

Parker Ava L · CIK 0001526207 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,094

SEC source: 0001209191-23-046300 · doc4.xml · nonDerivative · entry 1

Campbell C Robert · CIK 0001307261 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 53,783

SEC source: 0001209191-23-046291 · doc4.xml · nonDerivative · entry 2

Palomarez Javier Alberto · CIK 0001662017 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,511

F1 · shares: Shares disposed of represent shares withheld by the Issuer to pay taxes due upon vesting of restricted stock.

SEC source: 0001209191-23-046291 · doc4.xml · nonDerivative · entry 1

Palomarez Javier Alberto · CIK 0001662017 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,605

SEC source: 0001209191-23-046281 · doc4.xml · nonDerivative · entry 1

JOHNSON JULIA L · CIK 0001221442 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 69,731

SEC source: 0001209191-23-046277 · doc4.xml · nonDerivative · entry 2

Dwyer Robert J · CIK 0001307141 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,047

F1 · shares: Shares disposed of represent shares withheld by the Issuer to pay taxes due upon vesting of restricted stock.

SEC source: 0001209191-23-046277 · doc4.xml · nonDerivative · entry 1

Dwyer Robert J · CIK 0001307141 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,141

SEC source: 0001209191-23-046272 · doc4.xml · nonDerivative · entry 2

Csiszar Ernst N · CIK 0001341639 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 27,998

F1 · shares: Shares disposed of represent shares withheld by the Issuer to pay taxes due upon vesting of restricted stock.

SEC source: 0001209191-23-046272 · doc4.xml · nonDerivative · entry 1

Csiszar Ernst N · CIK 0001341639 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 28,109

SEC source: 0001209191-23-030232 · doc4.xml · nonDerivative · entry 2

Parker Ava L · CIK 0001526207 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,668

F1 · shares: Shares disposed of represent shares withheld by the Issuer to pay taxes due upon vesting of restricted stock.

SEC source: 0001209191-23-030232 · doc4.xml · nonDerivative · entry 1

Parker Ava L · CIK 0001526207 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,759

SEC source: 0001209191-23-030229 · doc4.xml · nonDerivative · entry 1

Campbell C Robert · CIK 0001307261 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 53,287

SEC source: 0001209191-23-030220 · doc4.xml · nonDerivative · entry 2

Palomarez Javier Alberto · CIK 0001662017 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,179

F1 · shares: Shares disposed of represent shares withheld by the Issuer to pay taxes due upon vesting of restricted stock.

SEC source: 0001209191-23-030220 · doc4.xml · nonDerivative · entry 1

Palomarez Javier Alberto · CIK 0001662017 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,270

SEC source: 0001209191-23-030216 · doc4.xml · nonDerivative · entry 1

JOHNSON JULIA L · CIK 0001221442 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 69,305

SEC source: 0001209191-23-030207 · doc4.xml · nonDerivative · entry 2

Dwyer Robert J · CIK 0001307141 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 17,715

F1 · shares: Shares disposed of represent shares withheld by the Issuer to pay taxes due upon vesting of restricted stock.

SEC source: 0001209191-23-030207 · doc4.xml · nonDerivative · entry 1

Dwyer Robert J · CIK 0001307141 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 17,806

SEC source: 0001209191-23-030193 · doc4.xml · nonDerivative · entry 2

Csiszar Ernst N · CIK 0001341639 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 27,605

F1 · shares: Shares disposed of represent shares withheld by the Issuer to pay taxes due upon vesting of restricted stock.

SEC source: 0001209191-23-030193 · doc4.xml · nonDerivative · entry 1

Csiszar Ernst N · CIK 0001341639 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 27,713

SEC source: 0001209191-23-020304 · doc4.xml · nonDerivative · entry 1

MAS JORGE · CIK 0000920559 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,437,888

F1 · shares: Shares disposed of represent shares withheld by the Issuer to pay taxes due upon vesting of restricted stock.

SEC source: 0001209191-23-020296 · doc4.xml · nonDerivative · entry 1

MAS JOSE RAMON · CIK 0001079760 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,158,246

F1 · shares: Shares disposed of represent shares withheld by the Issuer to pay taxes due upon vesting of restricted stock.

SEC source: 0001209191-23-020286 · doc4.xml · nonDerivative · entry 1

de Cardenas Alberto · CIK 0001250037 · EVP, General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 85,280

F1 · shares: Shares disposed of represent shares withheld by the Issuer to pay taxes due upon vesting of restricted stock.

SEC source: 0001209191-23-020278 · doc4.xml · nonDerivative · entry 1

Apple Robert E · CIK 0001382697 · COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 208,841

F1 · shares: Shares disposed of represent shares withheld by the Issuer to pay taxes due upon vesting of restricted stock.

F2 · balance_after: Includes 80,426 shares of MasTec common stock contributed by the reporting person to The Apple Family Trust of which the reporting person and his wife are trustees and beneficiaries.

SEC source: 0001209191-23-020266 · doc4.xml · nonDerivative · entry 1

Pita George · CIK 0001293639 · CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 156,475

F1 · shares: Shares disposed of represent shares withheld by the Issuer to pay taxes due upon vesting of restricted stock.

SEC source: 0001209191-23-018506 · doc4.xml · nonDerivative · entry 1

MAS JOSE RAMON · CIK 0001079760 · Director · CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,221,458

F1 · balance_after: Reflects transfer of 83,274 shares from the reporting person to Jose Ramon Mas Holdings I, LLC, a Florida limited liability company ("JRM Holdings I").

SEC source: 0001209191-23-018485 · doc4.xml · nonDerivative · entry 1

Apple Robert E · CIK 0001382697 · COO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 232,367

F1 · balance_after: Includes 80,426 shares of MasTec common stock contributed by the reporting person to The Apple Family Trust of which the reporting person and his wife are trustees and beneficiaries.

SEC source: 0001209191-23-018498 · doc4.xml · nonDerivative · entry 1

MAS JORGE · CIK 0000920559 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,471,156

F1 · balance_after: Reflects transfer of 417,700 shares from Jorge Mas Holdings I, LLC to the reporting person and his spouse.

SEC source: 0001209191-23-018487 · doc4.xml · nonDerivative · entry 1

de Cardenas Alberto · CIK 0001250037 · EVP, General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 94,409

SEC source: 0001209191-23-018481 · doc4.xml · nonDerivative · entry 1

Pita George · CIK 0001293639 · CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 177,415

SEC source: 0001209191-23-010702 · doc4.xml · nonDerivative · entry 2

Parker Ava L · CIK 0001526207 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,348

F1 · shares: Shares disposed of represent shares withheld by the Issuer to pay taxes due upon vesting of restricted stock.

SEC source: 0001209191-23-010702 · doc4.xml · nonDerivative · entry 1

Parker Ava L · CIK 0001526207 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,436

SEC source: 0001209191-23-010695 · doc4.xml · nonDerivative · entry 1

Campbell C Robert · CIK 0001307261 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 52,807

SEC source: 0001209191-23-010684 · doc4.xml · nonDerivative · entry 2

Palomarez Javier Alberto · CIK 0001662017 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 11,859

F1 · shares: Shares disposed of represent shares withheld by the Issuer to pay taxes due upon vesting of restricted stock.

SEC source: 0001209191-23-010684 · doc4.xml · nonDerivative · entry 1

Palomarez Javier Alberto · CIK 0001662017 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 11,947

SEC source: 0001209191-23-010671 · doc4.xml · nonDerivative · entry 1

JOHNSON JULIA L · CIK 0001221442 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 68,894

SEC source: 0001209191-23-010665 · doc4.xml · nonDerivative · entry 2

Dwyer Robert J · CIK 0001307141 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 17,395

F1 · shares: Shares disposed of represent shares withheld by the Issuer to pay taxes due upon vesting of restricted stock.

SEC source: 0001209191-23-010665 · doc4.xml · nonDerivative · entry 1

Dwyer Robert J · CIK 0001307141 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 17,483

SEC source: 0001209191-23-010655 · doc4.xml · nonDerivative · entry 2

Csiszar Ernst N · CIK 0001341639 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 27,225

F1 · shares: Shares disposed of represent shares withheld by the Issuer to pay taxes due upon vesting of restricted stock.

SEC source: 0001209191-23-010655 · doc4.xml · nonDerivative · entry 1

Csiszar Ernst N · CIK 0001341639 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 27,330

SEC source: 0000899243-23-001705 · doc4.xml · derivative · entry 3

MAS JOSE RAMON · CIK 0001079760 · Director · CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 0

Underlying: Common Stock · 212,500 shares

Expires not disclosed

F1 · derivative.exercise_price: As previously reported, on November 19, 2019, the reporting person and the Jose Ramon Mas Irrevocable Family Trust, one of the trustees of which is the reporting person's spouse (the "JR Trust"), entered into prepaid variable forward sale contracts (the "2019 Forward Sale Contracts") with an unaffiliated third party buyer. The reporting person pledged an aggregate of 775,000 shares and the JR Trust pledged an aggregate of 212,500 shares (the " Initially Pledged Shares") of MasTec, Inc. common stock to secure their obligations under the contracts, and retained ownership and voting rights in their respective portions of the Initially Pledged Shares during the term of the pledge. As more fully described below, the 2019 Forward Sale Contracts were amended, effectively eliminating any obligation of the JR Trust to deliver Initial Pledged Shares and reducing the reporting person's obligation to deliver shares of MasTec common stock to the amount of the Current Pledged Shares (defined below)

F1 · kind: As previously reported, on November 19, 2019, the reporting person and the Jose Ramon Mas Irrevocable Family Trust, one of the trustees of which is the reporting person's spouse (the "JR Trust"), entered into prepaid variable forward sale contracts (the "2019 Forward Sale Contracts") with an unaffiliated third party buyer. The reporting person pledged an aggregate of 775,000 shares and the JR Trust pledged an aggregate of 212,500 shares (the " Initially Pledged Shares") of MasTec, Inc. common stock to secure their obligations under the contracts, and retained ownership and voting rights in their respective portions of the Initially Pledged Shares during the term of the pledge. As more fully described below, the 2019 Forward Sale Contracts were amended, effectively eliminating any obligation of the JR Trust to deliver Initial Pledged Shares and reducing the reporting person's obligation to deliver shares of MasTec common stock to the amount of the Current Pledged Shares (defined below)

F1 · price: As previously reported, on November 19, 2019, the reporting person and the Jose Ramon Mas Irrevocable Family Trust, one of the trustees of which is the reporting person's spouse (the "JR Trust"), entered into prepaid variable forward sale contracts (the "2019 Forward Sale Contracts") with an unaffiliated third party buyer. The reporting person pledged an aggregate of 775,000 shares and the JR Trust pledged an aggregate of 212,500 shares (the " Initially Pledged Shares") of MasTec, Inc. common stock to secure their obligations under the contracts, and retained ownership and voting rights in their respective portions of the Initially Pledged Shares during the term of the pledge. As more fully described below, the 2019 Forward Sale Contracts were amended, effectively eliminating any obligation of the JR Trust to deliver Initial Pledged Shares and reducing the reporting person's obligation to deliver shares of MasTec common stock to the amount of the Current Pledged Shares (defined below)

F6 · derivative.exercise_date: Each component is exercisable on the same date as it expires, which date for each component, occurs between August 19, 2024 and September 8, 2025.

F6 · derivative.expiration_date: Each component is exercisable on the same date as it expires, which date for each component, occurs between August 19, 2024 and September 8, 2025.

F7 · ownership.nature: Shares held by the JR Trust. The reporting person disclaims beneficial ownership of these securities, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for purpose of Section 16 or for any other purpose.

SEC source: 0000899243-23-001705 · doc4.xml · derivative · entry 2

MAS JOSE RAMON · CIK 0001079760 · Director · CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 387,500

Underlying: Common Stock · 387,500 shares

Expires not disclosed

F1 · derivative.exercise_price: As previously reported, on November 19, 2019, the reporting person and the Jose Ramon Mas Irrevocable Family Trust, one of the trustees of which is the reporting person's spouse (the "JR Trust"), entered into prepaid variable forward sale contracts (the "2019 Forward Sale Contracts") with an unaffiliated third party buyer. The reporting person pledged an aggregate of 775,000 shares and the JR Trust pledged an aggregate of 212,500 shares (the " Initially Pledged Shares") of MasTec, Inc. common stock to secure their obligations under the contracts, and retained ownership and voting rights in their respective portions of the Initially Pledged Shares during the term of the pledge. As more fully described below, the 2019 Forward Sale Contracts were amended, effectively eliminating any obligation of the JR Trust to deliver Initial Pledged Shares and reducing the reporting person's obligation to deliver shares of MasTec common stock to the amount of the Current Pledged Shares (defined below)

F2 · derivative.exercise_price: On November 28, 2022, (i) the JR Trust and the buyer entered into an agreement to terminate the 2019 Forward Sale Contract to which it was a party with respect to all 212,500 shares covered thereby, with the JR Trust retaining ownership of all such shares, and (ii) the reporting person and the buyer entered into an amendment to the 2019 Forward Sale Contract (the "Amended Agreement") to which the reporting person is a party to reduce the number of shares covered thereby to 387,500 shares (the "Current Pledged Shares") of MasTec, Inc. common stock and to amend the Floor Price (as defined below) and the Cap Price (as defined below), which were determined based on the volume weighted average price of MasTec Inc.'s common stock for a specified period ended on January 10, 2023. The Amended Agreement provides for the settlement of the transaction, at the reporting person's option, in cash or shares of MasTec, Inc. common stock.

F3 · derivative.exercise_price: (Continued from Footnote 2) Current Pledged Shares are divided into thirty components split into two tranches (each, a "Tranche") of fifteen components each. The number of shares of MasTec, Inc. common stock to be potentially delivered to the buyer on the settlement date of each component in the first ("Tranche 1") or second ("Tranche 2") Tranche, as applicable (or on which to base the amount of cash to be delivered to the buyer on such settlement date) is to be determined as follows: (a) if the volume-weighted average price of MasTec, Inc. common stock on the designated valuation date for the applicable component (each, a "Settlement Price") is less than or equal to $78.5147 (the "Floor Price"), the reporting person will deliver to the buyer all of the Current Pledged Shares for the applicable component;

F4 · derivative.exercise_price: (Continued from Footnote 3) (b) if such Settlement Price is greater than the Floor Price but less than or equal to $124.7512 (the " Tranche 1 Cap Price") in the case of a component in Tranche 1, or $136.9646 (the "Tranche 2 Cap Price," and each of the Tranche 1 Cap Price and Tranche 2 Cap Price, a "Cap Price") in the case of a component in Tranche 2, the reporting person will deliver to the buyer the number of shares equal to one hundred percent (100%) of the Current Pledged Shares for the applicable component multiplied by a fraction, the numerator of which is the Floor Price and the denominator of which is such Settlement Price; and

F5 · derivative.exercise_price: (Continued from Footnote 4) (c) if such Settlement Price is greater than the Tranche 1 Cap Price in the case of a component in Tranche 1 or greater than the Tranche 2 Cap Price in the case of a component in Tranche 2, the reporting person will deliver to the buyer the number of shares equal to one hundred percent (100%) of Current Pledged Shares for the applicable component multiplied by a fraction, the numerator of which is the Floor Price plus the excess of such Settlement Price over the applicable Cap Price, and the denominator of which is such Settlement Price.

F1 · kind: As previously reported, on November 19, 2019, the reporting person and the Jose Ramon Mas Irrevocable Family Trust, one of the trustees of which is the reporting person's spouse (the "JR Trust"), entered into prepaid variable forward sale contracts (the "2019 Forward Sale Contracts") with an unaffiliated third party buyer. The reporting person pledged an aggregate of 775,000 shares and the JR Trust pledged an aggregate of 212,500 shares (the " Initially Pledged Shares") of MasTec, Inc. common stock to secure their obligations under the contracts, and retained ownership and voting rights in their respective portions of the Initially Pledged Shares during the term of the pledge. As more fully described below, the 2019 Forward Sale Contracts were amended, effectively eliminating any obligation of the JR Trust to deliver Initial Pledged Shares and reducing the reporting person's obligation to deliver shares of MasTec common stock to the amount of the Current Pledged Shares (defined below)

F2 · kind: On November 28, 2022, (i) the JR Trust and the buyer entered into an agreement to terminate the 2019 Forward Sale Contract to which it was a party with respect to all 212,500 shares covered thereby, with the JR Trust retaining ownership of all such shares, and (ii) the reporting person and the buyer entered into an amendment to the 2019 Forward Sale Contract (the "Amended Agreement") to which the reporting person is a party to reduce the number of shares covered thereby to 387,500 shares (the "Current Pledged Shares") of MasTec, Inc. common stock and to amend the Floor Price (as defined below) and the Cap Price (as defined below), which were determined based on the volume weighted average price of MasTec Inc.'s common stock for a specified period ended on January 10, 2023. The Amended Agreement provides for the settlement of the transaction, at the reporting person's option, in cash or shares of MasTec, Inc. common stock.

F3 · kind: (Continued from Footnote 2) Current Pledged Shares are divided into thirty components split into two tranches (each, a "Tranche") of fifteen components each. The number of shares of MasTec, Inc. common stock to be potentially delivered to the buyer on the settlement date of each component in the first ("Tranche 1") or second ("Tranche 2") Tranche, as applicable (or on which to base the amount of cash to be delivered to the buyer on such settlement date) is to be determined as follows: (a) if the volume-weighted average price of MasTec, Inc. common stock on the designated valuation date for the applicable component (each, a "Settlement Price") is less than or equal to $78.5147 (the "Floor Price"), the reporting person will deliver to the buyer all of the Current Pledged Shares for the applicable component;

F4 · kind: (Continued from Footnote 3) (b) if such Settlement Price is greater than the Floor Price but less than or equal to $124.7512 (the " Tranche 1 Cap Price") in the case of a component in Tranche 1, or $136.9646 (the "Tranche 2 Cap Price," and each of the Tranche 1 Cap Price and Tranche 2 Cap Price, a "Cap Price") in the case of a component in Tranche 2, the reporting person will deliver to the buyer the number of shares equal to one hundred percent (100%) of the Current Pledged Shares for the applicable component multiplied by a fraction, the numerator of which is the Floor Price and the denominator of which is such Settlement Price; and

F5 · kind: (Continued from Footnote 4) (c) if such Settlement Price is greater than the Tranche 1 Cap Price in the case of a component in Tranche 1 or greater than the Tranche 2 Cap Price in the case of a component in Tranche 2, the reporting person will deliver to the buyer the number of shares equal to one hundred percent (100%) of Current Pledged Shares for the applicable component multiplied by a fraction, the numerator of which is the Floor Price plus the excess of such Settlement Price over the applicable Cap Price, and the denominator of which is such Settlement Price.

F1 · price: As previously reported, on November 19, 2019, the reporting person and the Jose Ramon Mas Irrevocable Family Trust, one of the trustees of which is the reporting person's spouse (the "JR Trust"), entered into prepaid variable forward sale contracts (the "2019 Forward Sale Contracts") with an unaffiliated third party buyer. The reporting person pledged an aggregate of 775,000 shares and the JR Trust pledged an aggregate of 212,500 shares (the " Initially Pledged Shares") of MasTec, Inc. common stock to secure their obligations under the contracts, and retained ownership and voting rights in their respective portions of the Initially Pledged Shares during the term of the pledge. As more fully described below, the 2019 Forward Sale Contracts were amended, effectively eliminating any obligation of the JR Trust to deliver Initial Pledged Shares and reducing the reporting person's obligation to deliver shares of MasTec common stock to the amount of the Current Pledged Shares (defined below)

F2 · price: On November 28, 2022, (i) the JR Trust and the buyer entered into an agreement to terminate the 2019 Forward Sale Contract to which it was a party with respect to all 212,500 shares covered thereby, with the JR Trust retaining ownership of all such shares, and (ii) the reporting person and the buyer entered into an amendment to the 2019 Forward Sale Contract (the "Amended Agreement") to which the reporting person is a party to reduce the number of shares covered thereby to 387,500 shares (the "Current Pledged Shares") of MasTec, Inc. common stock and to amend the Floor Price (as defined below) and the Cap Price (as defined below), which were determined based on the volume weighted average price of MasTec Inc.'s common stock for a specified period ended on January 10, 2023. The Amended Agreement provides for the settlement of the transaction, at the reporting person's option, in cash or shares of MasTec, Inc. common stock.

F3 · price: (Continued from Footnote 2) Current Pledged Shares are divided into thirty components split into two tranches (each, a "Tranche") of fifteen components each. The number of shares of MasTec, Inc. common stock to be potentially delivered to the buyer on the settlement date of each component in the first ("Tranche 1") or second ("Tranche 2") Tranche, as applicable (or on which to base the amount of cash to be delivered to the buyer on such settlement date) is to be determined as follows: (a) if the volume-weighted average price of MasTec, Inc. common stock on the designated valuation date for the applicable component (each, a "Settlement Price") is less than or equal to $78.5147 (the "Floor Price"), the reporting person will deliver to the buyer all of the Current Pledged Shares for the applicable component;

F4 · price: (Continued from Footnote 3) (b) if such Settlement Price is greater than the Floor Price but less than or equal to $124.7512 (the " Tranche 1 Cap Price") in the case of a component in Tranche 1, or $136.9646 (the "Tranche 2 Cap Price," and each of the Tranche 1 Cap Price and Tranche 2 Cap Price, a "Cap Price") in the case of a component in Tranche 2, the reporting person will deliver to the buyer the number of shares equal to one hundred percent (100%) of the Current Pledged Shares for the applicable component multiplied by a fraction, the numerator of which is the Floor Price and the denominator of which is such Settlement Price; and

F5 · price: (Continued from Footnote 4) (c) if such Settlement Price is greater than the Tranche 1 Cap Price in the case of a component in Tranche 1 or greater than the Tranche 2 Cap Price in the case of a component in Tranche 2, the reporting person will deliver to the buyer the number of shares equal to one hundred percent (100%) of Current Pledged Shares for the applicable component multiplied by a fraction, the numerator of which is the Floor Price plus the excess of such Settlement Price over the applicable Cap Price, and the denominator of which is such Settlement Price.

F6 · derivative.exercise_date: Each component is exercisable on the same date as it expires, which date for each component, occurs between August 19, 2024 and September 8, 2025.

F6 · derivative.expiration_date: Each component is exercisable on the same date as it expires, which date for each component, occurs between August 19, 2024 and September 8, 2025.