Cornerstone Advisory, LLC

SEC CIK: 0001668189
Latest filing: Jul 29, 2026

SEC filings (opens in a new tab)

AMT holding history

American Tower Corp in every 13F filed by Cornerstone Advisory, LLC, including the quarters it was sold out or no filing was made. Changes compare share counts with the previous calendar quarter.

AMT overview All 13F holders of AMT Full Q2 2026 holdings

Shares (Q2 2026): 2,861
Value: $468.0K
% of portfolio: <0.1%
Quarters held: 22; Since Q1 2021

Holdings of AMT by Cornerstone Advisory, LLC, by quarter
Quarter	Shares	Value	% of portfolio	Share change	Action	All holders
Q2 2026	2,861	$468.0K	<0.1%	−311−9.8%	Reduced	Holders
Q1 2026	3,172	$547.3K	0.1%	+279+9.6%	Added	Holders
Q4 2025	2,893	$507.9K	<0.1%	−341−10.5%	Reduced	Holders
Q3 2025	3,234	$621.9K	0.1%	+17+0.5%	Added	Holders
Q2 2025	3,217	$711.1K	0.1%	−3−0.1%	Reduced	Holders
Q1 2025	3,220	$720.7K	0.1%	+96+3.1%	Added	Holders
Q4 2024	3,124	$591.5K	0.1%	+113+3.8%	Added	Holders
Q3 2024	3,011	$700.2K	0.1%	+23+0.8%	Added	Holders
Q2 2024	2,988	$580.8K	0.1%	−928−23.7%	Reduced	Holders
Q1 2024	3,916	$773.8K	0.1%	−33−0.8%	Reduced	Holders
Q4 2023	3,949	$852.5K	0.1%	+276+7.5%	Added	Holders
Q3 2023	3,673	$604.0K	0.1%	−124−3.3%	Reduced	Holders
Q2 2023	3,797	$736.4K	0.1%	−1,700−30.9%	Reduced	Holders
Q1 2023	5,497	$1.12M	0.2%	+409+8.0%	Added	Holders
Q4 2022	5,088	$1.08M	0.2%	+333+7.0%	Added	Holders
Q3 2022	4,755	$1.02M	0.2%	−350−6.9%	Reduced	Holders
Q2 2022	5,105	$1.30M	0.3%	−1,368−21.1%	Reduced	Holders
Q1 2022	6,473	$1.63M	0.2%	−48−0.7%	Reduced	Holders
Q4 2021	6,521	$1.91M	0.3%	−1,948−23.0%	Reduced	Holders
Q3 2021	8,469	$2.25M	0.4%	00.0%	Unchanged	Holders
Q2 2021	8,469	$2.29M	0.4%	−750−8.1%	Reduced	Holders
Q1 2021	9,219	$2.20M	0.4%	–	–	Holders

Livermore's 13F data starts with Q1 2021, so Q1 2021 has no change from the previous quarter.