AMT

AMERICAN TOWER CORP

$178.40

Closing price as of Apr 28, 2026

12 superinvestors own AMT

Based on latest 13F filings — data is 45–90 days delayed

Investor	Fund	Weight	Shares	Value	Quarter	Activity
William Von Mueffling	Cantillon Capital Management	1.85%	1,612,473	$278.3M	2026Q1	Reduced
Viking Global Investors	Viking Global Investors	1.79%	2,797,125	$618.2M	2025Q2	Added
Chase Coleman	Tiger Global Management	0.69%	605,000	$80.1M	2017Q2	Held
Thomas Gayner	Markel Group	0.18%	18,700	$708K	2000Q4	Held
Chuck Akre	Akre Capital Management	0.14%	50,772	$8.8M	2026Q1	Reduced
Kenneth Fisher	Fisher Asset Management	0.10%	1,736,413	$299.7M	2026Q1	Reduced
Christopher Davis	Davis Selected Advisers	0.05%	64,620	$11.2M	2026Q1	Added
Meridian / ArrowMark	Meridian Contrarian Fund	0.01%	2,216	$382K	2026Q1	Held
Dodge & Cox	Dodge & Cox	0.00%	900	$230K	2022Q2	Held
Bill & Melinda Gates Foundation	Bill & Melinda Gates Foundation Trust	0.00%	11,000	$1.8M	2023Q3	New
Ruane Cunniff	Sequoia Fund	0.00%	15,000	$142K	2001Q4	New
Mairs & Power	Mairs & Power Growth Fund	0.00%	2,020	$349K	2026Q1	Held

Open-market purchases (P) and sales (S) from SEC Form 4 filings · last 12 months

No open-market insider trades in the last 12 months.

Form 4 filings for option exercises and other transaction types are excluded.

STOCK Act disclosures · last 12 months

Congressional trade data coming soon.

We are sourcing STOCK Act disclosures and will display them here shortly.

What Is SEC Form 4?

Understand the insider trade filings behind AMT activity.

What Is a 13F Filing?

How superinvestors disclose their quarterly holdings.

Insider Cluster Buying

Why multiple insiders buying together is a strong signal.

Superinvestor Consensus

The most widely held stocks across all tracked institutions.