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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
1079760	Ramon Jose Mas	800 Douglas Road 12Th Floor Coral Gables FL 33134	Ceo	Yes	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	Disposition	2012-04-18	36,964	$16.38	1,144,345	No	4	S	Direct

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

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	92,520	Indirect	Indirect A
Common Stock	1,114,251	Indirect	Indirect B

Footnotes

Shares were disposed of solely to cover payroll tax withholding required upon vesting of restricted shares.
Shares owned of record by the Jorge Mas Canosa Freedom Foundation, Inc., a Florida not-for-profit corporation (the "Freedom Foundation") of which Mr. Jose Ramon Mas is the Secretary. Mr. Jose Ramon Mas disclaims beneficial ownership of all shares owned by the Freedom Foundation.
Shares owned of record by Jose Ramon Mas Holdings I Limited Partnership, a Texas limited partnership ("Jose Ramon Mas Holdings"). The sole general partner of Jose Ramon Mas Holdings is Jose Ramon Mas Holdings Corporation, a Texas corporation that is wholly-owned by Mr. Jose Ramon Mas.