MASTEC INC

Ticker: MTZ CUSIP: 576323109 Class: COM

WESTFIELD CAPITAL MANAGEMENT CO LP's Holding History (CIK: 0001177719)

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

Q3 2018

Shares 532,659 Value ($000) $23,783 Avg Close $46.29 Range $40.20 - $53.45

Q2 2018

Shares 770,669 Value ($000) $39,111 Avg Close $48.31 Range $43.90 - $54.70

Q1 2018

Shares 480,290 Value ($000) $22,598 Avg Close $50.70 Range $44.70 - $55.53

Q4 2017

Shares 831,675 Value ($000) $40,710 Avg Close $44.61 Range $39.83 - $51.20

Q3 2017

Shares 376,015 Value ($000) $17,447 Avg Close $43.56 Range $38.40 - $49.50

Q2 2017

Shares 267,415 Value ($000) $12,074 Avg Close $43.26 Range $38.33 - $47.90

Q4 2016

Shares 291,906 Value ($000) $11,165 Avg Close $33.93 Range $27.10 - $40.90

Q3 2016

Shares 748,926 Value ($000) $22,273 Avg Close $27.42 Range $22.03 - $31.15

Q2 2016

Shares 493,751 Value ($000) $11,021 Avg Close $22.18 Range $19.13 - $24.67

Q1 2016

Shares 541,890 Value ($000) $10,968 Avg Close $16.37 Range $12.44 - $20.85

Q1 2014

Shares 1,213,119 Value ($000) $52,698 Avg Close $37.96 Range $32.27 - $44.03

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2018	532,659	$23,783	$46.29	$40.20 - $53.45
Q2 2018	770,669	$39,111	$48.31	$43.90 - $54.70
Q1 2018	480,290	$22,598	$50.70	$44.70 - $55.53
Q4 2017	831,675	$40,710	$44.61	$39.83 - $51.20
Q3 2017	376,015	$17,447	$43.56	$38.40 - $49.50
Q2 2017	267,415	$12,074	$43.26	$38.33 - $47.90
Q4 2016	291,906	$11,165	$33.93	$27.10 - $40.90
Q3 2016	748,926	$22,273	$27.42	$22.03 - $31.15
Q2 2016	493,751	$11,021	$22.18	$19.13 - $24.67
Q1 2016	541,890	$10,968	$16.37	$12.44 - $20.85
Q1 2014	1,213,119	$52,698	$37.96	$32.27 - $44.03