Morgan Stanley Smith Barney files Form 144 for MTZ common sales

Morgan Stanley Smith Barney LLC submitted a Form 144 notice reporting proposed sales of Common stock for an account associated with the issuer on 03/03/2026 for NYSE-listed shares.

Rhea-AI Filing Summary

Morgan Stanley Smith Barney LLC submitted a Form 144 notice reporting proposed sales of Common stock for an account associated with the issuer on 03/03/2026 for NYSE-listed shares. The excerpt lists multiple grant or award dates and per‑grant quantities (examples: 366, 690, 357), along with broker and numeric fields shown in the header.

FAQ

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

What does the Form 144 filed for MTZ show?

The filing shows a broker notice of proposed sales of Common shares on 03/03/2026. It lists multiple grant dates and per‑grant share quantities such as 366 and 690 as reported in the excerpt.

Who is the broker handling the reported sales in the MTZ Form 144?

The excerpt names Morgan Stanley Smith Barney LLC as the broker, listing an address at 1 New York Plaza. This identifies the dealer handling the transactions reported in the notice.

Does the excerpt state the total shares or dollar amount being offered?

The excerpt displays numeric fields (for example 6500, 1952576.60, 78894830) but does not present a single, explicit labeled total in plain text tying them to a definitive aggregate offering amount.

Are the listed dates in the excerpt grant or vesting dates?

The excerpt lists multiple dates labeled alongside 'Compensation for Past Services' and 'Services Rendered', indicating they are grant or award-related dates for the reported common stock entries.

Do the per‑line quantities in the excerpt represent shares to be sold?

The per‑line numbers (for example 366, 690, 751) are presented with each date and appear as share counts, but the excerpt does not explicitly state they are the exact number of shares to be sold in each line.

Where were the reported shares to be sold listed to trade?

The excerpt indicates the trading venue as NYSE, associating the reported common shares with transactions on that exchange as of 03/03/2026.

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

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Accepted by SEC EDGAR 03/03/2026 - 04:06 PM EST Learn about SEC filing dates

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	0001341639
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	MASTEC, INC.
SEC File Number	001-08106
Address of Issuer	800 S. Douglas Road, 12th Floor Coral Gables FLORIDA 33134
Phone	305-599-1800
Name of Person for Whose Account the Securities are To Be Sold	ERNEST N CSISZAR
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	Director

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	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	6500	1952576.60	78894830	03/03/2026	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	11/15/2013	Compensation for Past Services	Issuer			366	11/15/2013	Services Rendered
Common	11/15/2014	Compensation for Past Services	issuer			690	11/15/2014	Services Rendered
Common	05/15/2013	Compensation for Past Services	Issuer			357	05/15/2013	Services Rendered
Common	05/15/2014	Compensation for Past Services	Issuer			85	05/15/2014	Services Rendered
Common	02/14/2025	Compensation for Past Services	Issuer			258	02/14/2025	Services Rendered
Common	09/07/2011	Compensation for Past Services	Issuer			168	09/07/2011	Services Rendered
Common	05/15/2020	Compensation for Past Services	Issuer			751	05/15/2020	Services Rendered
Common	02/15/2013	Compensation for Past Services	Issuer			388	02/15/2013	Services Rendered
Common	08/15/2013	Compensation for Past Services	Issuer			358	08/15/2013	Services Rendered
Common	08/15/2014	Compensation for Past Services	Issuer			604	08/15/2014	Services Rendered
Common	05/13/2016	Compensation for Past Services	Issuer			703	05/13/2016	Services Rendered
Common	11/15/2024	Compensation for Past Services	Issuer			259	11/15/2024	Services Rendered
Common	05/15/2024	Compensation for Past Services	Issuer			345	05/15/2024	Services Rendered
Common	02/15/2014	Compensation for Past Services	Issuer			317	02/15/2014	Services Rendered
Common	08/15/2024	Compensation for Past Services	Issuer			317	08/15/2024	Services Rendered
Common	11/15/2012	Compensation for Past Services	Issuer			534	11/15/2012	Services Rendered

* 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	03/03/2026
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	/s/ Ernest N Csiszar
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)