American Tower Corp
Ownership
Ownership Structure
Who owns American Tower Corp (AMT)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 99.7% of the shares are freely tradable; institutional investors hold 96.7%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 9.65 | 44,954,137 | +2.1 | 03/31/2026 |
| Vanguard Capital Management, LLC | 6.52 | 30,362,380 | +0.0 | 03/31/2026 |
| Vanguard Portfolio Management, LLC | 5.92 | 27,596,159 | +0.0 | 03/31/2026 |
| State Street Corp | 4.60 | 21,434,609 | +2.1 | 03/31/2026 |
| JPMorgan Chase & Co | 3.25 | 15,128,367 | +5.0 | 03/31/2026 |
| Geode Capital Management, LLC | 2.99 | 13,933,628 | +3.2 | 03/31/2026 |
| Cohen & Steers Inc | 2.96 | 13,777,789 | +9.2 | 06/30/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Vanguard Real Estate Index Investor | 3.81 | 17,731,284 | +0.0 | 07/31/2026 |
| Vanguard MStar Total Stk Mkt Idx Invest | 3.18 | 14,836,072 | +0.3 | 07/31/2026 |
| Vanguard 500 Index Investor | 2.62 | 12,231,150 | +1.1 | 07/31/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Dowling Ruth T | EVP, Chief Admin Ofr, GC & Sec | 27,711 | 4,866,052 $ | Jul 29, 2026 | direct |
| Meyer Robert Joseph | SVP & Advisor to the CFO | 21,428 | 3,762,757 $ | Jul 29, 2026 | direct |
| Kalathur Rajesh | Director | 7,765 | 1,363,534 $ | Aug 21, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Aug 21, 2026 | Kalathur Rajesh | Director | Buy | 2,829 | 177.00 | 500,733 |
| Jul 29, 2026 | Meyer Robert Joseph | SVP & Advisor to the CFO | Sell | 5,000 | 178.89 | 894,450 |
| Jul 29, 2026 | Dowling Ruth T | EVP, Chief Admin Ofr, GC & Sec | Sell | 1,106 | 174.96 | 193,506 |
| Jul 28, 2026 | Dowling Ruth T | EVP, Chief Admin Ofr, GC & Sec | Sell | 685 | 169.54 | 116,135 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: September 17, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.