AMERICAN TOWER CORP NEW

Ticker: AMT CUSIP: 03027X100 Class: COM

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

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

Q4 2025

Shares 51,681 Value ($000) $9,074 Avg Close $180.30 Range $169.12 - $192.63

Q3 2025

Shares 57,435 Value ($000) $11,046 Avg Close $204.56 Range $185.10 - $230.04

Q2 2025

Shares 57,712 Value ($000) $12,756 Avg Close $210.37 Range $190.80 - $225.87

Q1 2025

Shares 57,884 Value ($000) $12,596 Avg Close $189.52 Range $166.66 - $212.16

Q4 2024

Shares 64,292 Value ($000) $11,792 Avg Close $198.35 Range $171.45 - $222.90

Q3 2024

Shares 71,666 Value ($000) $16,667 Avg Close $210.79 Range $182.10 - $231.55

Q2 2024

Shares 73,821 Value ($000) $14,349 Avg Close $176.27 Range $160.72 - $190.06

Q1 2024

Shares 74,050 Value ($000) $14,632 Avg Close $186.13 Range $169.29 - $204.74

Q4 2023

Shares 74,501 Value ($000) $16,083 Avg Close $175.15 Range $141.88 - $204.01

Q3 2023

Shares 75,423 Value ($000) $12,403 Avg Close $167.65 Range $145.17 - $184.31

Q2 2023

Shares 78,222 Value ($000) $15,170 Avg Close $178.08 Range $162.53 - $192.95

Q1 2023

Shares 79,249 Value ($000) $16,194 Avg Close $189.59 Range $171.12 - $212.87

Q4 2022

Shares 77,796 Value ($000) $16,482 Avg Close $186.71 Range $159.82 - $204.49

Q3 2022

Shares 75,282 Value ($000) $16,163 Avg Close $228.80 Range $188.24 - $251.54

Q2 2022

Shares 75,511 Value ($000) $19,300 Avg Close $222.20 Range $196.54 - $240.37

Q1 2022

Shares 75,013 Value ($000) $18,845 Avg Close $214.86 Range $193.72 - $257.60

Q4 2021

Shares 75,362 Value ($000) $22,043 Avg Close $239.48 Range $222.02 - $259.23

Q3 2021

Shares 75,612 Value ($000) $20,068 Avg Close $248.67 Range $232.43 - $264.88

Q2 2021

Shares 75,667 Value ($000) $20,441 Avg Close $221.28 Range $204.65 - $239.67

Q1 2021

Shares 76,423 Value ($000) $18,270 Avg Close $192.28 Range $170.54 - $209.67

Q4 2020

Shares 76,568 Value ($000) $17,186 Avg Close $199.71 Range $184.97 - $217.31

Q3 2020

Shares 75,758 Value ($000) $18,313 Avg Close $216.72 Range $200.88 - $232.60

Q2 2020

Shares 77,276 Value ($000) $19,979 Avg Close $210.56 Range $171.21 - $229.12

Q1 2020

Shares 79,231 Value ($000) $17,253 Avg Close $197.22 Range $147.72 - $219.16

Q4 2019

Shares 81,315 Value ($000) $18,688 Avg Close $183.82 Range $171.19 - $195.06

Q3 2019

Shares 82,434 Value ($000) $18,229 Avg Close $183.38 Range $167.57 - $203.29

Q2 2019

Shares 82,537 Value ($000) $16,875 Avg Close $168.17 Range $157.69 - $183.80

Q1 2019

Shares 83,294 Value ($000) $16,414 Avg Close $146.03 Range $128.16 - $164.30

Q4 2018

Shares 82,868 Value ($000) $13,109 Avg Close $129.50 Range $116.26 - $139.59

Q3 2018

Shares 83,241 Value ($000) $12,095 Avg Close $120.79 Range $114.07 - $125.11

Q2 2018

Shares 84,791 Value ($000) $12,224 Avg Close $113.83 Range $109.35 - $119.75

Q1 2018

Shares 87,032 Value ($000) $12,649 Avg Close $114.77 Range $106.21 - $122.30

Q4 2017

Shares 87,962 Value ($000) $12,550 Avg Close $115.75 Range $109.97 - $125.87

Q3 2017

Shares 87,566 Value ($000) $11,969 Avg Close $112.31 Range $105.52 - $119.95

Q2 2017

Shares 89,716 Value ($000) $11,871 Avg Close $102.88 Range $96.18 - $110.06

Q1 2017

Shares 90,564 Value ($000) $11,007 Avg Close $87.85 Range $81.86 - $97.31

Q4 2016

Shares 90,359 Value ($000) $9,549 Avg Close $86.33 Range $79.20 - $93.79

Q3 2016

Shares 93,442 Value ($000) $10,590 Avg Close $90.38 Range $85.02 - $93.47

Q2 2016

Shares 95,913 Value ($000) $10,897 Avg Close $83.75 Range $79.73 - $89.81

Q1 2016

Shares 96,719 Value ($000) $9,901 Avg Close $73.16 Range $65.02 - $80.56

Q4 2015

Shares 98,025 Value ($000) $9,504 Avg Close $75.94 Range $67.91 - $81.06

Q3 2015

Shares 98,227 Value ($000) $8,642 Avg Close $72.97 Range $67.60 - $78.65

Q2 2015

Shares 98,841 Value ($000) $9,221 Avg Close $72.97 Range $70.92 - $75.72

Q1 2015

Shares 99,488 Value ($000) $9,367 Avg Close $74.63 Range $71.55 - $78.20

Q4 2014

Shares 89,686 Value ($000) $8,865 Avg Close $75.17 Range $68.98 - $81.29

Q3 2014

Shares 99,461 Value ($000) $9,313 Avg Close $72.53 Range $67.84 - $76.11

Q2 2014

Shares 99,949 Value ($000) $8,993 Avg Close $65.68 Range $60.55 - $68.85

Q1 2014

Shares 100,123 Value ($000) $8,197 Avg Close $61.59 Range $59.25 - $64.17

Q4 2013

Shares 100,333 Value ($000) $8,009 Avg Close $58.52 Range $53.88 - $61.27

Q3 2013

Shares 100,846 Value ($000) $7,476 Avg Close $54.19 Range $50.94 - $58.77

Q2 2013

Shares 99,541 Value ($000) $7,283,415 Avg Close $59.51 Range $52.17 - $63.74

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	51,681	$9,074	$180.30	$169.12 - $192.63
Q3 2025	57,435	$11,046	$204.56	$185.10 - $230.04
Q2 2025	57,712	$12,756	$210.37	$190.80 - $225.87
Q1 2025	57,884	$12,596	$189.52	$166.66 - $212.16
Q4 2024	64,292	$11,792	$198.35	$171.45 - $222.90
Q3 2024	71,666	$16,667	$210.79	$182.10 - $231.55
Q2 2024	73,821	$14,349	$176.27	$160.72 - $190.06
Q1 2024	74,050	$14,632	$186.13	$169.29 - $204.74
Q4 2023	74,501	$16,083	$175.15	$141.88 - $204.01
Q3 2023	75,423	$12,403	$167.65	$145.17 - $184.31
Q2 2023	78,222	$15,170	$178.08	$162.53 - $192.95
Q1 2023	79,249	$16,194	$189.59	$171.12 - $212.87
Q4 2022	77,796	$16,482	$186.71	$159.82 - $204.49
Q3 2022	75,282	$16,163	$228.80	$188.24 - $251.54
Q2 2022	75,511	$19,300	$222.20	$196.54 - $240.37
Q1 2022	75,013	$18,845	$214.86	$193.72 - $257.60
Q4 2021	75,362	$22,043	$239.48	$222.02 - $259.23
Q3 2021	75,612	$20,068	$248.67	$232.43 - $264.88
Q2 2021	75,667	$20,441	$221.28	$204.65 - $239.67
Q1 2021	76,423	$18,270	$192.28	$170.54 - $209.67
Q4 2020	76,568	$17,186	$199.71	$184.97 - $217.31
Q3 2020	75,758	$18,313	$216.72	$200.88 - $232.60
Q2 2020	77,276	$19,979	$210.56	$171.21 - $229.12
Q1 2020	79,231	$17,253	$197.22	$147.72 - $219.16
Q4 2019	81,315	$18,688	$183.82	$171.19 - $195.06
Q3 2019	82,434	$18,229	$183.38	$167.57 - $203.29
Q2 2019	82,537	$16,875	$168.17	$157.69 - $183.80
Q1 2019	83,294	$16,414	$146.03	$128.16 - $164.30
Q4 2018	82,868	$13,109	$129.50	$116.26 - $139.59
Q3 2018	83,241	$12,095	$120.79	$114.07 - $125.11
Q2 2018	84,791	$12,224	$113.83	$109.35 - $119.75
Q1 2018	87,032	$12,649	$114.77	$106.21 - $122.30
Q4 2017	87,962	$12,550	$115.75	$109.97 - $125.87
Q3 2017	87,566	$11,969	$112.31	$105.52 - $119.95
Q2 2017	89,716	$11,871	$102.88	$96.18 - $110.06
Q1 2017	90,564	$11,007	$87.85	$81.86 - $97.31
Q4 2016	90,359	$9,549	$86.33	$79.20 - $93.79
Q3 2016	93,442	$10,590	$90.38	$85.02 - $93.47
Q2 2016	95,913	$10,897	$83.75	$79.73 - $89.81
Q1 2016	96,719	$9,901	$73.16	$65.02 - $80.56
Q4 2015	98,025	$9,504	$75.94	$67.91 - $81.06
Q3 2015	98,227	$8,642	$72.97	$67.60 - $78.65
Q2 2015	98,841	$9,221	$72.97	$70.92 - $75.72
Q1 2015	99,488	$9,367	$74.63	$71.55 - $78.20
Q4 2014	89,686	$8,865	$75.17	$68.98 - $81.29
Q3 2014	99,461	$9,313	$72.53	$67.84 - $76.11
Q2 2014	99,949	$8,993	$65.68	$60.55 - $68.85
Q1 2014	100,123	$8,197	$61.59	$59.25 - $64.17
Q4 2013	100,333	$8,009	$58.52	$53.88 - $61.27
Q3 2013	100,846	$7,476	$54.19	$50.94 - $58.77
Q2 2013	99,541	$7,283,415	$59.51	$52.17 - $63.74