American Tower Corporation (AMT) Ownership
AMT ownership summary
as of October 18, 2026- Institutions
- 96.8% of shares outstanding
- Insiders
- 0.08% of shares outstanding
- Shares outstanding
- 466.0M
- Float
- 464.5M shares available to trade
- Short interest
- 1.82% 7.3M shares short
- Days to cover
- 2.79 short interest up 23.9% vs prior month
- Institutions 96.78%
- Insiders 0.08%
- Other investors 3.14%
AMT top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | BlackRock Inc | 9.83% | 45.8M | $8.48B | +842,424 (+1.9%) | June 30, 2026 |
| 2 | Vanguard Capital Management, LLC | 6.53% | 30.4M | $5.64B | +75,391 (+0.2%) | June 30, 2026 |
| 3 | Vanguard Portfolio Management, LLC | 5.98% | 27.9M | $5.16B | +255,653 (+0.9%) | June 30, 2026 |
| 4 | State Street Corp | 4.74% | 22.1M | $4.09B | +631,593 (+2.9%) | June 30, 2026 |
| 5 | Geode Capital Management, LLC | 2.97% | 13.8M | $2.56B | −94,658 (−0.7%) | June 30, 2026 |
| 6 | Cohen & Steers Inc | 2.96% | 13.8M | $2.55B | +1.2M (+9.2%) | June 30, 2026 |
| 7 | FMR Inc | 2.44% | 11.4M | $2.11B | +59,379 (+0.5%) | June 30, 2026 |
| 8 | Morgan Stanley - Brokerage Accounts | 2.06% | 9.6M | $1.78B | +27,048 (+0.3%) | June 30, 2026 |
| 9 | JPMorgan Chase & Co | 1.90% | 8.9M | $1.64B | −6.3M (−41.5%) | June 30, 2026 |
| 10 | Lazard Asset Management LLC | 1.80% | 8.4M | $1.56B | +1.1M (+14.7%) | June 30, 2026 |
| 11 | Amvescap Plc. | 1.52% | 7.1M | $1.31B | −206,234 (−2.8%) | June 30, 2026 |
| 12 | Deutsche Bank AG | 1.44% | 6.7M | $1.24B | −1.1M (−13.7%) | June 30, 2026 |
| 13 | Capital World Investors | 1.41% | 6.6M | $1.21B | +887,003 (+15.6%) | June 30, 2026 |
| 14 | NORGES BANK | 1.37% | 6.4M | $1.18B | −304,044 (−4.6%) | June 30, 2026 |
| 15 | Dimensional Fund Advisors, Inc. | 1.26% | 5.9M | $1.09B | +64,614 (+1.1%) | June 30, 2026 |
| 16 | Principal Financial Group Inc | 1.23% | 5.7M | $1.06B | −172,153 (−2.9%) | June 30, 2026 |
| 17 | Charles Schwab Investment Management Inc | 1.20% | 5.6M | $1.04B | +367,100 (+7.0%) | June 30, 2026 |
| 18 | Northern Trust Corp | 1.08% | 5.0M | $930.7M | −316,209 (−5.9%) | June 30, 2026 |
| 19 | The Goldman Sachs Group Inc | 1.06% | 5.0M | $918.6M | +260,993 (+5.6%) | June 30, 2026 |
| 20 | Legal & General Group PLC | 1.04% | 4.9M | $899.3M | +27,929 (+0.6%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 13 holders added 5.7M shares and 7 cut 8.4M.
AMT top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Vanguard Real Estate Index Investor | 3.79% | 17.6M | $3.27B | +125,840 (+0.7%) | September 30, 2026 |
| 2 | Vanguard MStar Total Stk Mkt Idx Invest | 3.18% | 14.8M | $2.74B | −29,415 (−0.2%) | August 31, 2026 |
| 3 | Vanguard 500 Index Investor | 2.63% | 12.2M | $2.27B | −139,728 (−1.1%) | September 30, 2026 |
| 4 | iShares Core S&P 500 ETF | 1.33% | 6.2M | $1.15B | −9,990 (−0.2%) | September 30, 2026 |
| 5 | Fidelity 500 Index | 1.30% | 6.0M | $1.12B | +23,234 (+0.4%) | August 31, 2026 |
| 6 | Lazard Global Listed Infrastructure Open | 1.27% | 5.9M | $1.09B | +2.5M (+72.4%) | September 30, 2026 |
| 7 | State Street® SPDR® S&P 500® ETF | 1.23% | 5.7M | $1.06B | — | September 30, 2026 |
| 8 | Vanguard MStar Value Index Investor | 0.95% | 4.4M | $822.1M | −17,257 (−0.4%) | September 30, 2026 |
| 9 | Vanguard Real Estate II Index | 0.67% | 3.1M | $578.6M | +22,482 (+0.7%) | September 30, 2026 |
| 10 | Principal Real Estate Securities R5 | 0.63% | 3.0M | $547.8M | −61,524 (−2.0%) | September 30, 2026 |
| 11 | Schwab US REIT ETF™ | 0.62% | 2.9M | $536.8M | +1,510 (+0.1%) | September 30, 2026 |
| 12 | State Street Real Estate Sel SectSPDRETF | 0.54% | 2.5M | $465.3M | +14,222 (+0.6%) | September 30, 2026 |
| 13 | Cohen & Steers Real Estate Securities A | 0.53% | 2.5M | $460.4M | — | September 30, 2026 |
| 14 | Vanguard Institutional Index I | 0.53% | 2.5M | $456.7M | −25,399 (−1.0%) | September 30, 2026 |
| 15 | Cohen & Steers Instl Realty Shares | 0.52% | 2.4M | $452.6M | −525,299 (−17.7%) | September 30, 2026 |
| 16 | Cohen & Steers Realty Shares L | 0.46% | 2.1M | $396.6M | −551,720 (−20.5%) | September 30, 2026 |
| 17 | American Funds Income Fd of Amer A | 0.45% | 2.1M | $391.3M | — | September 30, 2026 |
| 18 | American Funds American Balanced A | 0.43% | 2.0M | $370.5M | — | September 30, 2026 |
| 19 | DFA Real Estate Securities I | 0.40% | 1.9M | $346.7M | +61,260 (+3.4%) | August 31, 2026 |
| 20 | DFA Global Real Estate Securities Port | 0.38% | 1.8M | $324.4M | +62 (+0.0%) | August 31, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
AMT insider transactions
latest 17| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2026-03-30 | Ro Khanna | Sell | $170.19 | — | — |
| 2026-03-23 | Ro Khanna | Buy | $176.14 | — | — |
| 2026-03-10 | Rajesh Kalathur | Buy | $185.30 | 2,671 | $494,936 |
| 2026-03-02 | Eugene M Noel | Sell | $191.05 | 41,209 | $7.9M |
| 2026-02-06 | Ro Khanna | Buy | $171.46 | — | — |
| 2026-01-29 | Ro Khanna | Sell | $181.25 | — | — |
| 2026-01-23 | Ro Khanna | Buy | $178.68 | — | — |
| 2026-01-13 | Ro Khanna | Buy | $173.85 | — | — |
| 2025-12-09 | Tower Corp /Ma/ American | Sell | $69.75 | 2,288,621 | $159.6M |
| 2025-11-10 | Ro Khanna | Sell | $179.73 | — | — |
| 2025-11-03 | Ro Khanna | Buy | $177.00 | — | — |
| 2025-10-31 | Eugene F Reilly | Buy | $178.99 | 5,554 | $994,110 |
| 2025-10-07 | Ro Khanna | Buy | $186.71 | — | — |
| 2025-09-29 | Ro Khanna | Sell | $194.37 | — | — |
| 2025-09-05 | Ro Khanna | Sell | $198.36 | — | — |
| 2025-08-01 | Ro Khanna | Buy | $212.18 | — | — |
| 2025-07-31 | Juan Font | Sell | $208.33 | 720 | $149,998 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
AMT shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns AMT
Institutional investors own 96.8% of American Tower's shares and insiders 0.08%. The largest holder is BlackRock Inc with 9.83% of the shares (45.8M), as of June 30, 2026. Among the top 20 institutions, 13 added shares and 7 reduced their stake in the latest filings. Short interest is 1.82% of the float, or 2.79 days of average trading volume. The share count rose 17.0% since 2014.
Related: AMT analyst forecast, AMT key metrics, AMT dividend history. See the AMT stock overview for the latest quote and news.
AMT ownership FAQ
Who owns the most American Tower stock?
The largest shareholders of American Tower are BlackRock Inc (9.83%), Vanguard Capital Management, LLC (6.53%), Vanguard Portfolio Management, LLC (5.98%), State Street Corp (4.74%), Geode Capital Management, LLC (2.97%).
What percentage of American Tower is owned by institutions?
Institutions hold 96.8% of American Tower's shares outstanding; insiders hold 0.08%.
Which funds own American Tower?
The largest fund holders of American Tower are Vanguard Real Estate Index Investor (3.79%), Vanguard MStar Total Stk Mkt Idx Invest (3.18%), Vanguard 500 Index Investor (2.63%), iShares Core S&P 500 ETF (1.33%), Fidelity 500 Index (1.30%).
What is American Tower's short interest?
7.3M shares of American Tower were sold short, 1.82% of the float; at the average daily volume it would take 2.79 days to cover.
Are insiders buying or selling American Tower?
Of the latest 17 reported insider transactions in American Tower (since July 31, 2025), 9 were purchases and 8 were sales.
How many shares of American Tower are outstanding?
American Tower has 466.0M shares outstanding, of which 464.5M are in the public float.