Ownership Submission
FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
MAS JORGE
   2. Issuer Name and Ticker or Trading Symbol
MASTEC INC [MTZ] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
__X__ Director __X__ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
(Last)
(First)
(Middle)
800 DOUGLAS RD, 12TH FLOOR		 3. Date of Earliest Transaction (Month/Day/Year)
11/07/2012
(Street)

CORAL GABLES, FL 33134		 4. If Amendment, Date Original Filed(Month/Day/Year)
 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
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 06/01/2012   G V 631,712 D $ 0 8,989,598 I Indirect 1 (1)
Common Stock 11/02/2012   G V 7,085 D $ 0 8,982,513 I Indirect 1 (1)
Common Stock 11/07/2012   S   2,200,000 D $ 22.8 6,782,513 I Indirect 1 (1)
Common Stock               7,621,016 I Indirect 2 (2)
Common Stock               125,000 I Indirect 3 (3)
Common Stock               20,000 I Indirect 4 (4)

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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 Underlying Securities
(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 of Derivative Security: 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

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
MAS JORGE
800 DOUGLAS RD
12TH FLOOR
CORAL GABLES, FL 33134		   X   X    

Signatures

 By: s/ Alberto de Cardenas For: Jorge Mas   11/09/2012
**Signature of Reporting Person Date

Explanation of Responses:

* 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).
(1) Shares owned of record by Jorge Mas Holdings I Limited Partnership, a Texas limited partnership ("Jorge Mas Holdings"). The sole general partner of Jorge Mas Holdings is Jorge Mas Holdings Corporation, a Texas corporation ("JM Holdings Corp") which is wholly-owned by Mr. Jorge Mas.
(2) Shares owned directly by Jorge L. Mas Canosa Holdings I Limited Partnership, a Texas limited partnership, ("the Family Partnership"), and indirectly by Jorge Mas, as the president and sole director of Jorge L. Mas Canosa Holdings Corporation, a Texas corporation, the sole general partner of the Family Partnership. Mr. Jorge Mas disclaims beneficial ownership of the shares held by the Family Partnership except to the extent of his pecuniary interest therein.
(3) Shares owned of record by the Mas Family Foundation, Inc., a Florida not-for-profit corporation (the "Family Foundation") of which Mr. Jorge Mas is the president. Mr. Jorge Mas disclaims beneficial ownership of all shares owned by the Family Foundation.
(4) Shares owned of record by JM Holdings Corp.

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