AMERICAN TOWER CORP NEW

Ticker: AMT CUSIP: 03027X100 Class: COM

DRIEHAUS CAPITAL MANAGEMENT LLC's Holding History (CIK: 0000938206)

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

Q4 2018

Shares 51,867 Value ($000) $8,205 Avg Close $129.50 Range $116.26 - $139.59

Q3 2018

Shares 39,420 Value ($000) $5,728 Avg Close $120.79 Range $114.07 - $125.11

Q1 2018

Shares 40,824 Value ($000) $5,933 Avg Close $114.77 Range $106.21 - $122.30

Q4 2017

Shares 34,410 Value ($000) $4,909 Avg Close $115.75 Range $109.97 - $125.87

Q3 2016

Shares 20,504 Value ($000) $2,324 Avg Close $90.38 Range $85.02 - $93.47

Q4 2015

Shares 13,750 Value ($000) $1,333 Avg Close $75.94 Range $67.91 - $81.06

Q4 2014

Shares 24,774 Value ($000) $2,449 Avg Close $75.17 Range $68.98 - $81.29

Q3 2014

Shares 37,000 Value ($000) $3,464 Avg Close $72.53 Range $67.84 - $76.11

Q2 2013

Shares 43,916 Value ($000) $3,213 Avg Close $59.51 Range $52.17 - $63.74

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2018	51,867	$8,205	$129.50	$116.26 - $139.59
Q3 2018	39,420	$5,728	$120.79	$114.07 - $125.11
Q1 2018	40,824	$5,933	$114.77	$106.21 - $122.30
Q4 2017	34,410	$4,909	$115.75	$109.97 - $125.87
Q3 2016	20,504	$2,324	$90.38	$85.02 - $93.47
Q4 2015	13,750	$1,333	$75.94	$67.91 - $81.06
Q4 2014	24,774	$2,449	$75.17	$68.98 - $81.29
Q3 2014	37,000	$3,464	$72.53	$67.84 - $76.11
Q2 2013	43,916	$3,213	$59.51	$52.17 - $63.74