MasTec director logs stock grant, tax withholding

MasTec director Javier Alberto Palomarez reported routine equity compensation activity.

Rhea-AI Filing Summary

MasTec director Javier Alberto Palomarez reported routine equity compensation activity. He received a grant of 95 shares of common stock, increasing his direct holdings to 10,687 shares. On the same date, 21 shares were withheld by the company at $434.77 per share to cover taxes on vesting of restricted stock.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider Palomarez Javier Alberto

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	95	$0.00	$0.00
Exercise Price or Tax Liability	Common Stock	21	$434.77	$9K

Holdings After Transaction: Common Stock — 10,666 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

Tax-withheld shares: 21 shares Tax withholding price: $434.77 per share Stock grant: 95 shares +2 more

5 metrics

Tax-withheld shares 21 shares Withheld to pay taxes on restricted stock vesting

Tax withholding price <money>$434.77</money> per share Value for 21 shares withheld for taxes

Stock grant 95 shares Grant/award acquisition of common stock

Holdings after grant 10,687 shares Total common shares directly owned after transactions

Tax-withholding shares (summary) 21 shares TaxWithholdingShares in transactionSummary

Key Terms

restricted stock, tax-withholding disposition, grant/award acquisition, Form 4, +1 more

5 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-withholding disposition financial

"transaction_action": "tax-withholding disposition"

A tax-withholding disposition is an event or transaction—such as selling or transferring securities, exercising options, or receiving compensation—that triggers a requirement to hold back part of the payment and remit it to tax authorities. It matters to investors because it reduces the cash they receive immediately and can change the timing and amount of taxable income, like a cashier taking a portion of your sale proceeds to pay taxes before you get the rest.

grant/award acquisition financial

"transaction_action": "grant/award acquisition"

Form 4 regulatory

"INSIDER FILING DATA (Form 4):"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

Common Stock financial

"security_title": "Common Stock""

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transactions did MasTec (MTZ) director Javier Alberto Palomarez report?

He reported a small stock grant and related tax withholding. Palomarez received 95 shares of MasTec common stock and had 21 shares withheld by the company to cover taxes due upon vesting of restricted stock, leaving him with 10,687 shares directly owned.

Was the MasTec (MTZ) insider activity a market sale or a tax withholding?

The disposition was tax withholding, not an open-market sale. The 21 shares were withheld by MasTec to pay taxes on vested restricted stock, as described in the footnote, which is a standard, non-discretionary part of equity compensation administration.

How many MasTec (MTZ) shares does director Javier Alberto Palomarez hold after these Form 4 transactions?

After the reported transactions, Palomarez directly owns 10,687 shares of MasTec common stock. This reflects the net effect of a 95-share grant and 21 shares withheld by the issuer to satisfy tax obligations tied to restricted stock vesting on the same date.

What do the A and F transaction codes mean in the MasTec (MTZ) Form 4?

Code A indicates a grant or award acquisition of shares, here 95 common shares. Code F indicates shares disposed of to pay taxes or exercise costs; in this filing, 21 shares were withheld by MasTec to cover taxes on restricted stock vesting.

Did the MasTec (MTZ) Form 4 show any option exercises or derivative transactions?

No derivative transactions are listed in the provided data. Both reported entries involve MasTec common stock as non-derivative securities, with one grant of 95 shares and one 21-share tax-withholding disposition related to restricted stock vesting on the same transaction date.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 05/19/2026 - 04:48 PM EDT 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)
05/15/2026

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	05/15/2026		A		95	A	$0	10,687	D
Common Stock	05/15/2026		F		21(1)	D	$434.77	10,666	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	05/19/2026
	** 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)