MTZ files Form 144 for 20k-share, $3.6M insider sale

Rhea-AI Filing Summary

MasTec, Inc. (MTZ) – Form 144 filing

An unidentified holder has notified the SEC of a planned sale of 20,000 common shares on or about 04 Aug 2025. At the implied reference price, the deal is worth $3.6 million (≈ $180 per share). The stock was acquired via employee stock-option exercises on 14 Mar 2021 (8,862 sh) and 19 Mar 2023 (18,374 sh).

• Total shares outstanding: 78,907,954; proposed sale equals ≈ 0.03 % of the float—an immaterial amount in liquidity terms.
• Broker: Merrill Lynch; execution venue: NYSE.
• No sales by this holder in the previous three months.
• Standard representation states the seller knows of no undisclosed material adverse information.

The notice signals a routine insider transaction with no dilution and limited market impact, though investors may read it as a modest sentiment check.

Positive

• Sale represents only ~0.03 % of shares outstanding, indicating negligible dilution or market overhang.
• Form 144 affirms no undisclosed adverse information, supporting transparency and governance compliance.

Negative

• Insider share disposal can be viewed as a mild bearish sentiment signal despite its small size.
• $3.6 million worth of stock enters the market, adding modest supply on the announced sale date.

Insights

Securities Analyst

TL;DR: Minor insider sale (0.03 % float) worth $3.6 m; routine Form 144, neutral valuation impact.

The filing discloses a small planned disposition of MasTec shares via Merrill Lynch. At 0.03 % of shares outstanding, market absorption should be seamless, especially given MTZ’s average daily volume of several hundred-thousand shares (not specified here). Proceeds suggest an exercise-and-sell strategy rather than a strategic exit. No past-quarter sales are reported, and the Rule 144 representation affirms absence of undisclosed negative information. Overall, this is a neutral corporate event; it neither alters capital structure nor signals operational weakness, but investors often monitor insider activity for sentiment cues.

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK
Filer CCC
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.

Relationship to Issuer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
COMMON	MERRILL LYNCH 355 ALHAMBRA CIRCLE SUITE 1600 CORAL GABLES FL 33134	20000	3600000.00	78907954	08/04/2025	NYSE

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
COMMON	03/14/2021	STOCK OPTION	MASTEC INC			8862	03/14/2021	STOCK OPTION
COMMON	03/19/2023	STOCK OPTION	MASTEC INC			18374	03/19/2023	STOCK OPTION

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Nothing to Report

144: Remarks and Signature

Remarks

Date of Notice

ATTENTION:

The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.

Signature

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

How many MasTec (MTZ) shares are being sold under this Form 144?

20,000 common shares are slated for sale.

What is the estimated value of the proposed MTZ share sale?

The aggregate market value is $3.6 million.

When is the planned sale date for the MTZ shares?

Approximately 04 August 2025.

How were the shares to be sold acquired?

Through employee stock-option exercises on 14 Mar 2021 and 19 Mar 2023.

What percentage of MasTec’s shares outstanding does the sale represent?

Roughly 0.03 % of the 78,907,954 shares outstanding.

Which broker will execute the transaction?

The sale is to be handled by Merrill Lynch on the NYSE.

Were any MasTec shares sold by this insider in the prior three months?

No; the filing reports nothing to disclose for that period.