MASTEC INC

Ticker: MTZ CUSIP: 576323109 Class: COM

GILDER GAGNON HOWE & CO LLC's Holding History (CIK: 0000902464)

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

Q3 2021

Shares 39,882 Value ($000) $3,441 Avg Close $94.87 Range $85.11 - $107.25

Q2 2021

Shares 40,870 Value ($000) $4,336 Avg Close $108.58 Range $93.16 - $122.33

Q4 2019

Shares 91,391 Value ($000) $5,864 Avg Close $65.85 Range $59.85 - $73.71

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2021	39,882	$3,441	$94.87	$85.11 - $107.25
Q2 2021	40,870	$4,336	$108.58	$93.16 - $122.33
Q4 2019	91,391	$5,864	$65.85	$59.85 - $73.71