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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
15615	Mastec Inc	MTZ	Water, Sewer, Pipeline, Comm & Power Line Construction (1623)	650829355

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1250037	Alberto Cardenas De	800 Douglas Rd 12Th Floor Coral Gables FL 33134	Executive Vice President	No	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Acquisiton	2012-12-13	25,000	$10.13	61,102	No	4	M	Direct
Common Stock	Disposition	2012-12-13	25,000	$23.56	36,102	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	M	Direct
No	4	S	Direct

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Non-Qualified Stock Option (right to buy)	Disposition	2012-12-13	25,000	$0.00	25,000	$10.13

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
45,258	2006-11-16	2010-11-16	No	4	M	Direct

Footnotes

The price reported in Column 4 is a weighted average price. These shares were sold pursuant to a 10b5-1 Sales Plan in multiple transactions at prices ranging from $23.50 to $23.70, inclusive. The reporting person undertakes to provide to MasTec, Inc. ("MasTec"), any security holder of MasTec or the staff of the Securites and Exchange Commission, upon request, full information regarding the number of shares sold at each seperate price within the range set forth in footnote (1) to this Form-4.