MasTec director sells 3,000 shares at $417.00

MasTec Inc. director C Robert Campbell reported selling 3,000 shares of the company’s Common Stock in an open-market sale.

Rhea-AI Filing Summary

MasTec Inc. director C Robert Campbell reported selling 3,000 shares of the company’s Common Stock in an open-market sale. The transactions were executed at a price of $417.00 per share. After these sales, he directly owns 30,646 shares of MasTec Common Stock.

According to the disclosure, the 3,000 shares were sold in 14 separate transactions, each at $417.00 per share. Campbell has undertaken to provide full details of the share amounts in each individual transaction upon request to MasTec, its security holders, or the staff of the Securities and Exchange Commission.

Insider Trade Summary

Net Seller: 3,000 shares

Net Sell 1 txn

Insider Campbell C Robert

Role Director

Sold 3,000 shs ($1.25M)

Type	Security	Shares	Price	Value
Sale	Common Stock	3,000	$417.00	$1.25M

Holdings After Transaction: Common Stock — 30,646 shares (Direct)

Footnotes (1)

1. F1. These shares were sold in 14 separate transactions, each with a price of $417.00. The reporting person undertakes to provide the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission upon request, full information regarding the number of shares sold in each transaction.

Key Figures

Shares sold: 3,000 shares Sale price: $417.00 per share Shares after transaction: 30,646 shares +1 more

4 metrics

Shares sold 3,000 shares Open-market sale of MasTec Common Stock

Sale price $417.00 per share Price for each of the 14 transactions

Shares after transaction 30,646 shares Directly owned by C Robert Campbell after sale

Net shares sold 3,000 shares Net sell direction reported in transaction summary

Key Terms

Common Stock, open-market sale, Securities and Exchange Commission

3 terms

Common Stock financial

"3,000 shares of the company’s Common Stock in an open-market sale"

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.

open-market sale financial

"reported selling 3,000 shares of the company’s Common Stock in an open-market sale"

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

Securities and Exchange Commission regulatory

"to the Issuer, any security holder or the staff of the Securities and Exchange Commission upon request"

A national government agency that enforces rules for buying, selling and disclosing information about stocks and other investments, acting like a referee and scorekeeper for financial markets. It requires companies to share clear, regular financial and business information and investigates fraud or rule-breaking, which matters to investors because those rules and disclosures help ensure fair prices, reduce hidden risks and make it easier to compare investment choices.

FAQ

What insider transaction did MasTec (MTZ) disclose for C Robert Campbell?

MasTec director C Robert Campbell sold 3,000 shares of Common Stock in an open-market transaction. The shares were sold at $417.00 each, and he now directly holds 30,646 MasTec shares following the reported sale.

How many MasTec (MTZ) shares did C Robert Campbell sell and at what price?

C Robert Campbell sold 3,000 MasTec Common Stock shares at $417.00 per share. The sales occurred as 14 separate transactions, all at the same price, according to the disclosed Form 4 insider trading report.

How many MasTec (MTZ) shares does C Robert Campbell own after the sale?

After selling 3,000 MasTec shares, C Robert Campbell directly owns 30,646 shares of Common Stock. This post-transaction holding is reported in the Form 4 and reflects his remaining direct ownership position in MasTec.

Were C Robert Campbell’s MasTec (MTZ) share sales a single trade or multiple trades?

The 3,000 MasTec shares were sold in 14 separate transactions, each priced at $417.00 per share. The filing notes Campbell will provide detailed share counts for each individual trade upon request to the company, its holders, or SEC staff.

What type of insider transaction did MasTec (MTZ) report for C Robert Campbell?

MasTec reported an open-market sale of Common Stock by director C Robert Campbell. The Form 4 classifies the activity as a non-derivative open-market sale, with 3,000 shares sold at $417.00 per share and 30,646 shares remaining directly owned.

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Accepted by SEC EDGAR 05/06/2026 - 04:41 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^*

Campbell C Robert

(Last) (First) (Middle)

4145 PINTA COURT

(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)
05/04/2026

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	05/04/2026		S		3,000(1)	D	$417	30,646	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 were sold in 14 separate transactions, each with a price of $417.00. The reporting person undertakes to provide the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission upon request, full information regarding the number of shares sold in each transaction.

Remarks:

	\s\ Alberto de Cardenas For: Robert Campbell	05/06/2026
	** 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)