AMT American Tower Corp.
American Tower Corp. (AMT) Institutional Ownership
What the institutions did with AMT last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended September 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
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Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| EASTERN BANK | 161.6K | 58.5% |
| PARK NATIONAL CORP /OH/ | 41.3K | 14.9% |
| MassMutual Private Wealth & Trust, FSB | 19.9K | 7.2% |
| Stonebridge Financial Group, LLC | 16.4K | 5.9% |
| BAKER TILLY WEALTH MANAGEMENT, LLC | 8.6K | 3.1% |
| FERGUSON WELLMAN CAPITAL MANAGEMENT, INC | 4.8K | 1.7% |
| CX Institutional | 4.2K | 1.5% |
| Ridgewood Investments LLC | 3.6K | 1.3% |
| Boltwood Capital Management | 2.8K | 1.0% |
| General Partner, Inc. | 2.4K | 0.9% |
| Adelphi Trust Co | 2.0K | 0.7% |
| Heartwood Wealth Advisors LLC | 1.8K | 0.6% |
| Violich Capital Management, Inc. | 1.4K | 0.5% |
| Montecito Bank & Trust | 1.4K | 0.5% |
| ROCKLAND TRUST CO | 1.3K | 0.5% |
| Rosenberg Matthew Hamilton | 803 | 0.3% |
| Versant Capital Management, Inc | 511 | 0.2% |
| Central Pacific Bank - Trust Division | 325 | 0.1% |
| Hickory Point Bank & Trust | 300 | 0.1% |
| Planning Strategies Inc. | 243 | 0.1% |
| GoalVest Advisory LLC | 180 | 0.1% |
| Coastline Trust Co | 151 | 0.1% |
| Roxbury Financial LLC | 140 | 0.1% |
| Olistico Wealth, LLC | 133 | 0.0% |
| ACIMA PRIVATE WEALTH, LLC | 75 | 0.0% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| BAKER TILLY WEALTH MANAGEMENT, LLC | Increased | 6.6K | 8.6K | +2.0K |
| Coastline Trust Co | Reduced | 1.9K | 151 | -1.8K |
| ROCKLAND TRUST CO | New | 0 | 1.3K | +1.3K |
| CX Institutional | Reduced | 4.9K | 4.2K | -715 |
| FERGUSON WELLMAN CAPITAL MANAGEMENT, INC | Reduced | 5.5K | 4.8K | -687 |
| EASTERN BANK | Reduced | 162.1K | 161.6K | -547 |
| MassMutual Private Wealth & Trust, FSB | Reduced | 20.4K | 19.9K | -512 |
| Stonebridge Financial Group, LLC | Increased | 15.9K | 16.4K | +510 |
| PARK NATIONAL CORP /OH/ | Reduced | 41.8K | 41.3K | -477 |
| Hickory Point Bank & Trust | New | 0 | 300 | +300 |
| Rosenberg Matthew Hamilton | Increased | 627 | 803 | +176 |
| Montecito Bank & Trust | Reduced | 1.5K | 1.4K | -110 |
| Boltwood Capital Management | Increased | 2.7K | 2.8K | +70 |
| Adelphi Trust Co | Increased | 1.9K | 2.0K | +46 |
| Heartwood Wealth Advisors LLC | Increased | 1.7K | 1.8K | +40 |
| Versant Capital Management, Inc | Reduced | 543 | 511 | -32 |
| TOMPKINS FINANCIAL CORP | Sold Out | 13 | 0 | -13 |
| Ridgewood Investments LLC | Increased | 3.6K | 3.6K | +6 |
| Planning Strategies Inc. | Increased | 242 | 243 | +1 |
| Roxbury Financial LLC | Increased | 139 | 140 | +1 |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.