MasTec director has 15,958 shares withheld for taxes

MasTec director Jorge Mas reported a routine tax-withholding transaction.

Rhea-AI Filing Summary

MasTec director Jorge Mas reported a routine tax-withholding transaction. On this Form 4, 15,958 shares of MasTec common stock were disposed of at $297.81 per share, representing shares withheld by the company to pay taxes due upon the vesting of restricted stock.

After this withholding, Mas continues to hold 4,540,848 MasTec shares directly. He is also associated with additional indirect holdings, including shares held by a family trust, Mas Equity Partners III, a family foundation, and Jorge Mas Holdings I, LLC. Several of these indirect positions are reported with explicit disclaimers of beneficial ownership, indicating they are held for family or charitable entities rather than for Mas personally.

Insider Trade Summary

Exercise Price or Tax Liability: 15,958 shares

Exercise Price or Tax Liability 5 txns

Insider MAS JORGE

Role Director

Type	Security	Shares	Price	Value
Exercise Price or Tax Liability	Common Stock	15,958	$297.81	$4.75M
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 4,540,848 shares (Direct); Common Stock — 6,890,425 shares (Indirect, Indirect)

Footnotes (5)

1. F1. Shares disposed of represent shares withheld by the Issuer to pay taxes due upon vesting of restricted stock.
2. F2. Shares held by the Jorge Mas Irrevocable Family Trust dated August 7, 2018, one of the trustees of which is the reporting person's spouse. 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.
3. F3. Shares owned by Mas Equity Partners III, LLC, a Delaware limited liability company ("MEP III"), in which Mas Equity Partners, LLC ("MEP") is a member. The sole member of MEP is the reporting person. The reporting person disclaims beneficial ownership of the securities held by MEP III except to the extent of his pecuniary interest therein.
4. F4. Shares owned of record by the Mas Family Foundation, Inc., a Florida not-for-profit corporation (the "Family Foundation"), of which the reporting person is the president. The reporting person disclaims beneficial ownership of all shares owned by the Family Foundation.
5. F5. Shares owned of record by Jorge Mas Holdings I, LLC, a Florida limited liability company, which is controlled by Jorge Mas Holdings, LLC, a Florida limited liability company, of which the reporting person is the sole member.

FAQ

What insider transaction did MasTec (MTZ) director Jorge Mas report?

Jorge Mas reported a tax-withholding disposition of 15,958 MasTec common shares. These shares were withheld by the company to pay taxes triggered when restricted stock vested, rather than being sold in the open market.

At what price were Jorge Mas’s MasTec (MTZ) shares withheld for taxes?

The 15,958 MasTec shares were valued at $297.81 per share for the tax-withholding transaction. This value reflects the price used to satisfy the tax obligation on the vesting restricted stock.

How many MasTec (MTZ) shares does Jorge Mas hold directly after this Form 4?

Following the tax-withholding transaction, Jorge Mas directly holds 4,540,848 MasTec common shares. This large remaining direct position shows the withholding affected only a small fraction of his overall direct ownership.

What indirect MasTec (MTZ) holdings are associated with Jorge Mas?

Indirect holdings include shares in a family trust, Mas Equity Partners III, a family foundation, and Jorge Mas Holdings I, LLC. The filing notes that Mas disclaims beneficial ownership for certain entities, such as the family trust and foundation.

Was Jorge Mas’s MasTec (MTZ) Form 4 transaction an open-market sale?

No, the Form 4 describes a tax-withholding disposition, not an open-market sale. The issuer withheld 15,958 shares to cover taxes due when restricted stock vested, a common administrative process rather than a discretionary sale.

Does Jorge Mas claim full beneficial ownership of all indirect MasTec (MTZ) shares?

No, the filing states he disclaims beneficial ownership of shares held by the family trust and the family foundation. For Mas Equity Partners III, he disclaims beneficial ownership except to the extent of his pecuniary interest in that entity.

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Accepted by SEC EDGAR 03/12/2026 - 04:30 PM Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

MAS JORGE

(Last) (First) (Middle)

800 DOUGLAS ROAD, 12TH FLOOR

(Street)

CORAL GABLES FL 33134

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
MASTEC INC [ MTZ ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
03/10/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	03/10/2026		F		15,958(1)	D	$297.81	4,540,848	D
Common Stock								848,941	I	Indirect(2)
Common Stock								276,000	I	Indirect(3)
Common Stock								100,000	I	Indirect(4)
Common Stock								5,665,484	I	Indirect(5)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

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

2. Shares held by the Jorge Mas Irrevocable Family Trust dated August 7, 2018, one of the trustees of which is the reporting person's spouse. 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.

3. Shares owned by Mas Equity Partners III, LLC, a Delaware limited liability company ("MEP III"), in which Mas Equity Partners, LLC ("MEP") is a member. The sole member of MEP is the reporting person. The reporting person disclaims beneficial ownership of the securities held by MEP III except to the extent of his pecuniary interest therein.

4. Shares owned of record by the Mas Family Foundation, Inc., a Florida not-for-profit corporation (the "Family Foundation"), of which the reporting person is the president. The reporting person disclaims beneficial ownership of all shares owned by the Family Foundation.

5. Shares owned of record by Jorge Mas Holdings I, LLC, a Florida limited liability company, which is controlled by Jorge Mas Holdings, LLC, a Florida limited liability company, of which the reporting person is the sole member.

Remarks:

	\s\ Alberto de Cardenas For: Jorge Mas	03/12/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.