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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
1307141	J Robert Dwyer	880 South Ocean Boulevard Palm Beach FL 33480		Yes	No	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	2011-09-02	15,000	$7.09	51,298	No	4	M	Direct
Common Stock	Disposition	2011-09-02	15,000	$20.71	36,298	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	2011-09-02	15,000	$0.00	15,000	$7.09

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
5,000		2014-11-01	No	4	M	Direct

Footnotes

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $20.69 to $20.755, inclusive. The reporting person undertakes to provide to MasTec, Inc. ("MasTec"), any security holder of MasTec or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote (1) to this Form 4.
The options vested in substantially equal installments on November 1st of 2005, 2006, and 2007.