CLARKE TERESA HILLARY purchased 6.4% of their position (338.23 shares) of AMERICAN TOWER CORP /MA/ on the open market

Open‑market purchase worth $63.7K — a moderate purchase. The strongest form of insider conviction signal.

P · 15 purchases

CLARKE TERESA HILLARY

Filed: 10/22/2026ACC: 0001053507-26-000151

InsiderCLARKE TERESA HILLARYCIK 1875332

→

IssuerAMERICAN TOWER CORP /MA/CIK 1053507

Director

Since Dec 2021

+338.23

Net shares

Net buyer

$63.7K

Total acquired

Open market trades

15B · 0S

Total transactions

338.23 acquired

Non-Derivative Transactions15

Common Stock

Direct

P · Purchase

+6.67

Price / share

$205.93

Trade value

$1.37K

% of position

0.1%

4/28/2023

5.31K→5.31K

Common Stock

Direct

P · Purchase

+7.19

Price / share

$193.78

Trade value

$1.39K

% of position

0.1%

7/10/2023

5.31K→5.32K

Common Stock

Direct

P · Purchase

+8.45

Price / share

$171.52

Trade value

$1.45K

% of position

0.2%

10/27/2023

5.32K→5.33K

Common Stock

Direct

P · Purchase

+7.68

Price / share

$199.95

Trade value

$1.54K

% of position

0.1%

2/1/2024

5.33K→5.34K

Common Stock

Direct

P · Purchase

+18.59

Price / share

$172.82

Trade value

$3.21K

% of position

0.3%

4/26/2024

5.34K→5.36K

Common Stock

Direct

P · Purchase

+15.87

Price / share

$204.28

Trade value

$3.24K

% of position

0.3%

7/12/2024

5.36K→5.37K

Common Stock

Direct

P · Purchase

+14.37

Price / share

$227.42

Trade value

$3.27K

% of position

0.3%

10/25/2024

5.37K→5.39K

Common Stock

Direct

P · Purchase

+17.58

Price / share

$187.27

Trade value

$3.29K

% of position

0.3%

2/3/2025

5.39K→5.40K

Common Stock

Direct

P · Purchase

+25.49

Price / share

$209.33

Trade value

$5.34K

% of position

0.5%

4/28/2025

5.40K→5.43K

Common Stock

Direct

P · Purchase

+24.09

Price / share

$223.23

Trade value

$5.38K

% of position

0.4%

7/11/2025

5.43K→5.45K

Common Stock

Direct

P · Purchase

+28.66

Price / share

$189.12

Trade value

$5.42K

% of position

0.5%

10/20/2025

5.45K→5.48K

Common Stock

Direct

P · Purchase

+30.71

Price / share

$178.04

Trade value

$5.47K

% of position

0.6%

2/2/2026

5.48K→5.51K

Common Stock

Direct

P · Purchase

+43.50

Price / share

$177.08

Trade value

$7.70K

% of position

0.8%

4/28/2026

5.51K→5.56K

Common Stock

Direct

P · Purchase

+46.45

Price / share

$167.52

Trade value

$7.78K

% of position

0.8%

7/13/2026

5.56K→5.60K

Common Stock

Direct

P · Purchase

+42.93

Price / share

$183.20

Trade value

$7.86K

% of position

0.8%

10/20/2026

5.60K→5.65K

Total

Net shares

+338.23

Net value

$63.72K

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common Stock Direct	4/28/2023	P · Purchase	+6.67	$205.93	$1.37K	0.1%	5.31K	5.31K
Common Stock Direct	7/10/2023	P · Purchase	+7.19	$193.78	$1.39K	0.1%	5.31K	5.32K
Common Stock Direct	10/27/2023	P · Purchase	+8.45	$171.52	$1.45K	0.2%	5.32K	5.33K
Common Stock Direct	2/1/2024	P · Purchase	+7.68	$199.95	$1.54K	0.1%	5.33K	5.34K
Common Stock Direct	4/26/2024	P · Purchase	+18.59	$172.82	$3.21K	0.3%	5.34K	5.36K
Common Stock Direct	7/12/2024	P · Purchase	+15.87	$204.28	$3.24K	0.3%	5.36K	5.37K
Common Stock Direct	10/25/2024	P · Purchase	+14.37	$227.42	$3.27K	0.3%	5.37K	5.39K
Common Stock Direct	2/3/2025	P · Purchase	+17.58	$187.27	$3.29K	0.3%	5.39K	5.40K
Common Stock Direct	4/28/2025	P · Purchase	+25.49	$209.33	$5.34K	0.5%	5.40K	5.43K
Common Stock Direct	7/11/2025	P · Purchase	+24.09	$223.23	$5.38K	0.4%	5.43K	5.45K
Common Stock Direct	10/20/2025	P · Purchase	+28.66	$189.12	$5.42K	0.5%	5.45K	5.48K
Common Stock Direct	2/2/2026	P · Purchase	+30.71	$178.04	$5.47K	0.6%	5.48K	5.51K
Common Stock Direct	4/28/2026	P · Purchase	+43.50	$177.08	$7.70K	0.8%	5.51K	5.56K
Common Stock Direct	7/13/2026	P · Purchase	+46.45	$167.52	$7.78K	0.8%	5.56K	5.60K
Common Stock Direct	10/20/2026	P · Purchase	+42.93	$183.20	$7.86K	0.8%	5.60K	5.65K
Total			+338.23		$63.72K

Derivative Transactions0

No derivative transactions reported