MASTEC INC — Director's Dealing 2005

May 31, 2005

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: MASTEC INC (MTZ)
CIK: 0000015615
Period of Report: 2005-05-27

Reporting Person: SORZANO JOSE S (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2005-05-27	Common Stock	M	22500	$5.7833	Acquired	34694	Direct
2005-05-27	Common Stock	S	22500	$8.25	Disposed	12194	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2005-05-27	Non-Qualified Stock Option (right to buy)	$5.7833	M	22500	Disposed	2005-06-28	Common Stock (22500)	Direct

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Non-Qualified Stock Option (right to buy)	$4.32	2006-11-12	Common Stock (20000)	20000	Direct
Non-Qualified Stock Option (right to buy)	$4.86	2013-06-02	Common Stock (7500)	7500	Direct
Non-Qualified Stock Option (right to buy)	$8.8	2014-12-01	Common Stock (20000)	20000	Direct
Non-Qualified Stock Option (right to buy)	$12.695	2008-03-22	Common Stock (20000)	20000	Direct
Non-Qualified Stock Option (right to buy)	$13.655	2008-06-27	Common Stock (10000)	10000	Direct
Non-Qualified Stock Option (right to buy)	$13.87	2013-12-16	Common Stock (50000)	50000	Direct
Non-Qualified Stock Option (right to buy)	$14.0625	2007-12-29	Common Stock (15000)	15000	Direct
Non-Qualified Stock Option (right to buy)	$14.5555	2006-06-04	Common Stock (24750)	24750	Direct
Non-Qualified Stock Option (right to buy)	$17.8959	2009-05-25	Common Stock (15000)	15000	Direct

Footnotes

F1: Exercise of exempt Rule 16b-3 option.

F2: Exempt stock option under the MasTec, Inc. 1994 Stock Option Plan for Non-Employee Directors which vest 1/3 per year beginning twelve months from the date of grant in equal installments.

F3: Exempt stock option granted under the MasTec, Inc. 1994 Stock Option Plan for Non-Employee Directors. 50% vested May 15, 2002 and remaining 50% vested May 2003.

F4: Exempt stock option grant that vests over three years. First two years vest at 33% and third year vests at 34%. Vesting begins twelve months after date of grant (06/02/2003).

F5: Formula stock option grant pursuant to MasTec, Inc. Amended and Restated 2003 Plan for Non-Employees for no cash consideration.

F6: Exempt stock option grant that vests over three years beginning twelve months after date of grant (12/01/2004). First year 33% vests. Second year an additional 33% vests. Third year remaining 34% vests.

F7: Exempt stock option grant that vests over three years. First two years vest at 33% and third year vests at 34%. Vesting begins twelve months after date of grant (12/16/2003).