MasTec director reports stock compensation entries

MasTec director Ava L. Parker reported routine equity compensation activity.

Rhea-AI Filing Summary

MasTec director Ava L. Parker reported routine equity compensation activity. She received 121 shares of Common Stock as part of her quarterly director compensation, calculated using the closing share price on May 14, 2026, and elected to defer receipt of 60 of those shares under the Issuer's Deferred Fee Plan for Directors. In a separate transaction, 14 shares were withheld by MasTec to pay taxes due upon vesting of restricted stock, a tax-withholding disposition rather than an open-market sale. After these entries, Parker directly holds 5,392 shares of MasTec Common Stock.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider Parker Ava L

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	121	$0.00	$0.00
Exercise Price or Tax Liability	Common Stock	14	$434.77	$6K

Holdings After Transaction: Common Stock — 5,392 shares (Direct)

Footnotes (2)

1. F1. These shares of Common Stock represent the portion of the reporting person's quarterly compensation that the reporting person was required to or elected to receive in the form of shares of Common Stock. The number of shares was calculated based on the closing price of a share of Common Stock on May 14, 2026. Pursuant to the Issuer's Deferred Fee Plan for Directors, the reporting person elected to defer the receipt of 60 of such shares to a future date in accordance with the terms of such plan.
2. F2. Shares disposed of represent shares withheld by the Issuer to pay taxes due upon vesting of restricted stock.

Key Figures

Stock grant: 121 shares Deferred shares: 60 shares Tax withholding shares: 14 shares +2 more

5 metrics

Stock grant 121 shares Quarterly director compensation in Common Stock

Deferred shares 60 shares Deferred under Deferred Fee Plan for Directors

Tax withholding shares 14 shares Withheld to pay taxes on restricted stock vesting

Post-transaction holdings 5,406 shares Common Stock held directly after Form 4 transactions

Reference price per share $434.77 per share Price used for 14-share tax-withholding disposition

Key Terms

Deferred Fee Plan for Directors, restricted stock, tax-withholding disposition, grant, award, or other acquisition

4 terms

Deferred Fee Plan for Directors financial

"Pursuant to the Issuer's Deferred Fee Plan for Directors, the reporting person elected to defer the receipt of 60 of such shares"

restricted stock financial

"Shares disposed of represent shares withheld by the Issuer to pay 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, or other acquisition financial

"transaction_code_description: Grant, award, or other acquisition"

FAQ

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

What did MasTec (MTZ) director Ava L. Parker report in this Form 4?

Ava L. Parker reported routine equity compensation and tax withholding entries. She received Common Stock as part of her quarterly director compensation and had a small number of shares withheld by MasTec to cover taxes on vested restricted stock, with no open-market buying or selling involved.

How many MasTec (MTZ) shares were granted to Ava L. Parker?

Parker was granted 121 shares of MasTec Common Stock. These shares represent the portion of her quarterly director compensation taken in stock, with the grant value based on the closing share price on May 14, 2026, as specified in the company’s director compensation plan.

How many MasTec (MTZ) shares did Ava L. Parker defer under the Deferred Fee Plan?

Parker elected to defer receipt of 60 of the granted shares. Under MasTec’s Deferred Fee Plan for Directors, she chose to postpone taking delivery of those shares until a future date, in line with the plan’s terms governing director fee deferrals.

What does the 14-share disposition by Ava L. Parker represent for MasTec (MTZ)?

The 14-share disposition reflects tax withholding on vested restricted stock. MasTec withheld these Common Stock shares to pay taxes due when Parker’s restricted stock vested, a non-market transaction rather than a discretionary sale on the open market.

How many MasTec (MTZ) shares does Ava L. Parker hold after these transactions?

Following these entries, Parker directly holds 5,406 MasTec shares. This total reflects the net result after receiving her quarterly stock-based compensation and the small tax-withholding share reduction associated with the vesting of restricted stock awards.

Were Ava L. Parker’s MasTec (MTZ) Form 4 transactions open-market trades?

No, the transactions were compensation-related and tax withholding only. The filing shows a grant of Common Stock as quarterly director compensation and a small share withholding to cover taxes on restricted stock vesting, with no open-market purchases or sales reported.

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

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Accepted by SEC EDGAR 05/19/2026 - 04:50 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^*

Parker Ava L

(Last) (First) (Middle)

10589 VERSAILLES BLVD

(Street)

WELLINGTON FLORIDA 33449

(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		121(1)	A	$0	5,406	D
Common Stock	05/15/2026		F		14(2)	D	$434.77	5,392	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. These shares of Common Stock represent the portion of the reporting person's quarterly compensation that the reporting person was required to or elected to receive in the form of shares of Common Stock. The number of shares was calculated based on the closing price of a share of Common Stock on May 14, 2026. Pursuant to the Issuer's Deferred Fee Plan for Directors, the reporting person elected to defer the receipt of 60 of such shares to a future date in accordance with the terms of such plan.

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

Remarks:

	\s\ Alberto de Cardenas For: Ava L. Parker	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)