American Tower Corporation (AMT) ownership: Top institutional holder: VANGUARD GROUP INC ($11.19B). Insider activity: Net Seller (9 buys, 11 sells). 10 recent congressional STOCK Act disclosures. SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| VANGUARD GROUP INC | 63757586.00 | $11.19B | 2025-12-31 |
| BlackRock, Inc. | 44954137.00 | $7.76B | 2026-03-31 |
| VANGUARD CAPITAL MANAGEMENT LLC | 30362380.00 | $5.24B | 2026-03-31 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 27596159.00 | $4.76B | 2026-03-31 |
| STATE STREET CORP | 21434609.00 | $3.70B | 2026-03-31 |
| JPMORGAN CHASE & CO | 15128367.00 | $2.58B | 2026-03-31 |
| GEODE CAPITAL MANAGEMENT, LLC | 13933628.00 | $2.40B | 2026-03-31 |
| COHEN & STEERS, INC. | 12619866.00 | $2.18B | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-06-01 | |
| Buy | null | 2026-06-01 | |
| Sell | null | 2026-05-28 | |
| Sell | null | 2026-05-28 | |
| Sell | null | 2026-05-20 | |
| Sell | null | 2026-05-20 | |
| Sell | null | 2026-05-20 | |
| Sell | null | 2026-05-20 |
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Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.