MasTec (NYSE: MTZ) director logs 139-share award, tax withholding

Rhea-AI Filing Summary

MASTEC INC (MTZ) director Javier Alberto Palomarez reported equity compensation activity. On 2026-08-14 he received a grant of 139 shares of common stock at no cost. On the same date, 31 shares were disposed of at $297.59 per share, representing shares withheld by the issuer to pay taxes due upon vesting of restricted stock.

Insider Trade Summary

Net Buyer: 108 shares

Net Buy 2 txns

Insider Palomarez Javier Alberto

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	139	$0.00	$0.00
Tax Withholding	Common Stock F1	31	$297.59	$9K

Holdings After Transaction: Common Stock — 10,774 shares (Direct)

Footnotes (1)

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

Key Figures

Shares granted: 139 shares Shares withheld for taxes: 31 shares Withholding price per share: $297.59 per share +2 more

5 metrics

Shares granted 139 shares Grant of MasTec common stock to director on 2026-08-14 (code A)

Shares withheld for taxes 31 shares Shares disposed of to pay tax liability on vesting of restricted stock

Withholding price per share $297.59 per share Price used for 31 shares withheld under transaction code F

Net buy/sell shares 0 shares Transaction summary net buy/sell direction reported as neutral

ExercisePriceOrTaxLiabilityShares 31 shares Total shares reported under code F for tax liability payment

Key Terms

restricted stock, tax liability, withholding securities

3 terms

restricted stock financial

"taxes due upon vesting of restricted stock"

Shares granted to an individual that carry limits on transfer or sale until certain conditions are met, such as staying with the company for a set time or hitting performance targets. Think of them as a locked gift that gradually opens; for investors they matter because they affect how many shares may enter the market later, signal management incentives and potential dilution, and reveal confidence in future company performance.

tax liability financial

"pay taxes due upon vesting of restricted stock"

withholding securities financial

"payment of tax liability by delivering or withholding securities"

FAQ

What insider transactions did MTZ director Javier Alberto Palomarez report on August 14, 2026?

Palomarez reported a grant of 139 shares of MasTec common stock and a disposition of 31 shares the same day. The disposition reflects shares withheld by MasTec to cover taxes due upon vesting of restricted stock, rather than an open-market sale.

Was the August 14, 2026 MasTec (MTZ) insider transaction an open-market buy or sell?

The Form 4 shows no open-market purchases or sales. It reports a stock grant of 139 shares and 31 shares withheld by MasTec to pay tax liability upon vesting of restricted stock, categorized under transaction code F.

How many MasTec (MTZ) shares were withheld for taxes in the Palomarez Form 4 filing?

The filing states that 31 shares of MasTec common stock were disposed of at $297.59 per share. A footnote clarifies these shares were withheld by the issuer to pay taxes due upon vesting of restricted stock, not sold in the market.

What does transaction code A mean in the MasTec (MTZ) Form 4 for Javier Palomarez?

Transaction code A indicates a grant or award acquisition. Palomarez received 139 shares of MasTec common stock as a stock award at a reported price of $0.00 per share, reflecting compensation rather than a purchase transaction.

What does transaction code F signify in the August 2026 MasTec (MTZ) insider report?

Transaction code F denotes payment of tax liability by delivering or withholding securities. In this case, 31 shares were withheld by MasTec to satisfy taxes owed upon vesting of restricted stock granted to director Javier Alberto Palomarez.

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 08/18/2026 - 04:43 PM Accepted by SEC EDGAR 08/18/2026 - 04:43 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^*

Palomarez Javier Alberto

(Last) (First) (Middle)

1025 CANONGATE DRIVE

(Street)

FLOWER MOUND TEXAS 75022

(City) (State) (Zip)

UNITED STATES

(Country)

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)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/14/2026

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

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

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

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	08/14/2026		A		139	A	$0	10,805	D
Common Stock	08/14/2026		F		31(1)	D	$297.59	10,774	D

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.

Remarks:

	\s\ Alberto de Cardenas For: Javier Palomarez	08/18/2026
	** 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.
* Form 4: SEC 1474 (03-26)