MasTec director granted 139 shares of stock

MASTEC INC (MTZ) reported that director Alex Spiro received a grant or award of 139 shares of Common Stock on August 14, 2026.

Rhea-AI Filing Summary

MASTEC INC (MTZ) reported that director Alex Spiro received a grant or award of 139 shares of Common Stock on August 14, 2026. The shares were acquired at a reported price of $0.00 per share, increasing his directly held position to 139 shares.

Insider Trade Summary

Grant/Award: 139 shares

Grant/Award 1 txn

Insider Spiro Alex

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	139	$0.00	$0.00

Holdings After Transaction: Common Stock — 139 shares (Direct)

Key Figures

Shares acquired: 139 shares Transaction price per share: $0.00 per share Holdings after transaction: 139 shares

3 metrics

Shares acquired 139 shares Grant, award, or other acquisition of Common Stock on August 14, 2026

Transaction price per share $0.00 per share Reported price for the 139-share grant or award

Holdings after transaction 139 shares Total directly held MasTec Common Stock following the reported transaction

Key Terms

Grant, award, or other acquisition, Common Stock, Rule 10b5-1

3 terms

Grant, award, or other acquisition regulatory

"transaction_code_description: Grant, award, or other acquisition"

Common Stock financial

"security_title: Common Stock in the reported transaction"

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.

Rule 10b5-1 regulatory

"Rule 10b5-1 checkbox indicating plan status for transactions"

Rule 10b5-1 is a regulation that allows company insiders to buy or sell their shares at predetermined times, even if they have access to non-public information. It acts like setting a schedule in advance for transactions, helping prevent accusations of unfair trading. This rule provides a way for insiders to plan trades transparently, giving investors confidence that these transactions are not based on hidden information.

FAQ

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

What insider transaction did Alex Spiro report at MASTEC INC (MTZ)?

Alex Spiro reported a grant or award of Common Stock. On August 14, 2026, he acquired 139 shares of MasTec common stock in a non-derivative transaction reported on Form 4 as a grant, award, or other acquisition.

How many MASTEC INC (MTZ) shares did Alex Spiro acquire and at what price?

Alex Spiro acquired 139 shares of MasTec common stock at a reported price of $0.00 per share. The transaction is coded as a grant, award, or other acquisition, indicating it was not a market purchase.

What are Alex Spiro’s MASTEC INC (MTZ) holdings after this Form 4 transaction?

Following the reported transaction, Alex Spiro directly holds 139 shares of MasTec common stock. The Form 4 indicates these 139 shares represent his total directly owned non-derivative holdings after the grant or award on August 14, 2026.

Was Alex Spiro’s MASTEC INC (MTZ) transaction under a Rule 10b5-1 plan?

The filing indicates the Rule 10b5-1 checkbox was not marked for this transaction. That means the reported grant or award of 139 shares was not affirmed as executed under a pre-arranged Rule 10b5-1 trading plan.

Is Alex Spiro a 10% owner of MASTEC INC (MTZ) according to this Form 4?

According to the Form 4 data, Alex Spiro is reported as a director but not as a 10% owner. The is_ten_percent_owner field is set to 0, indicating he does not beneficially own at least 10% of MasTec’s equity securities.

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

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Available on EDGAR 08/18/2026 - 04:40 PM Accepted by SEC EDGAR 08/18/2026 - 04:40 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^*

Spiro Alex

(Last) (First) (Middle)

6312 RIVIERA DRIVE

(Street)

CORAL GABLES FLORIDA 33146

(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	139	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:

Remarks:

	\s\ Alberto de Cardenas For: Alex Spiro	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)