MASTEC INC

Ticker: MTZ CUSIP: 576323109 Class: COM

NEXT CENTURY GROWTH INVESTORS LLC's Holding History (CIK: 0001134007)

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

Q4 2018

Shares 158,714 Value ($000) $6,437 Avg Close $43.06 Range $37.24 - $51.77

Q3 2018

Shares 191,828 Value ($000) $8,565 Avg Close $46.29 Range $40.20 - $53.45

Q2 2018

Shares 191,721 Value ($000) $9,729 Avg Close $48.31 Range $43.90 - $54.70

Q1 2018

Shares 204,407 Value ($000) $9,617 Avg Close $50.70 Range $44.70 - $55.53

Q4 2017

Shares 125,386 Value ($000) $6,137 Avg Close $44.61 Range $39.83 - $51.20

Q2 2014

Shares 587,926 Value ($000) $18,119 Avg Close $37.68 Range $27.96 - $44.80

Q1 2014

Shares 1,138,756 Value ($000) $49,467 Avg Close $37.96 Range $32.27 - $44.03

Q4 2013

Shares 1,195,291 Value ($000) $39,109 Avg Close $31.66 Range $29.76 - $34.17

Q3 2013

Shares 1,586,199 Value ($000) $48,061 Avg Close $32.84 Range $28.88 - $35.31

Q2 2013

Shares 1,687,989 Value ($000) $55,534 Avg Close $30.13 Range $26.27 - $33.97

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2018	158,714	$6,437	$43.06	$37.24 - $51.77
Q3 2018	191,828	$8,565	$46.29	$40.20 - $53.45
Q2 2018	191,721	$9,729	$48.31	$43.90 - $54.70
Q1 2018	204,407	$9,617	$50.70	$44.70 - $55.53
Q4 2017	125,386	$6,137	$44.61	$39.83 - $51.20
Q2 2014	587,926	$18,119	$37.68	$27.96 - $44.80
Q1 2014	1,138,756	$49,467	$37.96	$32.27 - $44.03
Q4 2013	1,195,291	$39,109	$31.66	$29.76 - $34.17
Q3 2013	1,586,199	$48,061	$32.84	$28.88 - $35.31
Q2 2013	1,687,989	$55,534	$30.13	$26.27 - $33.97