MASTEC INC

Ticker: MTZ CUSIP: 576323109 Class: COM

GLUSKIN SHEFF & ASSOC INC's Holding History (CIK: 0000905790)

Note: Option positions (PUT/CALL) are excluded.

Q1 2014

Shares 1,049,814 Value ($000) $45,604 Avg Close $37.96 Range $32.27 - $44.03

Q4 2013

Shares 521,607 Value ($000) $17,067 Avg Close $31.66 Range $29.76 - $34.17

Q3 2013

Shares 932,090 Value ($000) $28,242 Avg Close $32.84 Range $28.88 - $35.31

Q2 2013

Shares 480,840 Value ($000) $16,636 Avg Close $30.13 Range $26.27 - $33.97

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2014	1,049,814	$45,604	$37.96	$32.27 - $44.03
Q4 2013	521,607	$17,067	$31.66	$29.76 - $34.17
Q3 2013	932,090	$28,242	$32.84	$28.88 - $35.31
Q2 2013	480,840	$16,636	$30.13	$26.27 - $33.97