Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in AMT held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 45.0M | $7.76B | +2.1% | 9.649% | 0.14% |
| 2 | VANGUARD CAPITAL MANAGEMENT LLC | 30.4M | $5.24B | — | 6.517% | 0.13% |
| 3 | VANGUARD PORTFOLIO MANAGEMENT LLC | 27.6M | $4.76B | — | 5.923% | 0.25% |
| 4 | STATE STREET CORP | 21.4M | $3.70B | +2.1% | 4.601% | 0.13% |
| 5 | Kentucky Farm Bureau Mutual Insurance Co | 13K | $2.99B | — | 0.003% | 0.07% |
| 6 | GEODE CAPITAL MANAGEMENT, LLC | 13.9M | $2.40B | +3.2% | 2.991% | 0.15% |
| 7 | FMR LLC | 11.3M | $1.95B | -5.8% | 2.429% | 0.11% |
| 8 | MORGAN STANLEY | 9.6M | $1.65B | -2.3% | 2.057% | 0.10% |
| 9 | DEUTSCHE BANK AG\ | 7.8M | $1.34B | +12.4% | 1.668% | 0.44% |
| 10 | LAZARD ASSET MANAGEMENT LLC | 7.3M | $1.26B | +20.4% | 1.573% | 2.08% |
| 11 | Invesco Ltd. | 7.3M | $1.26B | +4.7% | 1.562% | 0.19% |
| 12 | PRINCIPAL FINANCIAL GROUP INC | 5.9M | $1.02B | -2.0% | 1.270% | 0.55% |
| 13 | DIMENSIONAL FUND ADVISORS LP | 5.8M | $1.00B | -7.5% | 1.247% | 0.21% |
| 14 | Capital World Investors | 5.7M | $978.2M | +34.3% | 1.217% | 0.13% |
| 15 | NORTHERN TRUST CORP | 5.3M | $921.5M | -0.3% | 1.146% | 0.12% |
| 16 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 5.2M | $904.4M | +2.7% | 1.125% | 0.14% |
| 17 | Legal & General Group Plc | 4.8M | $832.9M | -1.0% | 1.036% | 0.19% |
| 18 | GOLDMAN SACHS GROUP INC | 4.7M | $812.3M | +21.1% | 1.010% | 0.09% |
| 19 | BANK OF AMERICA CORP /DE/ | 4.5M | $778.6M | +14.4% | 0.968% | 0.06% |
| 20 | UBS ASSET MANAGEMENT AMERICAS INC | 4.3M | $748.9M | +2.0% | 0.931% | 0.16% |
| 21 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 4.2M | $724.1M | -1.7% | 0.901% | 0.39% |
| 22 | Capital Research Global Investors | 4.1M | $708.2M | +4.6% | 0.881% | 0.11% |
| 23 | Nuveen, LLC | 3.9M | $671.2M | -2.1% | 0.835% | 0.18% |
| 24 | Amundi | 3.8M | $661.1M | +21.0% | 0.822% | 0.18% |
| 25 | Clearbridge Investments, LLC | 3.7M | $636.0M | +13.9% | 0.791% | 0.55% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). “% of Fund” shows how much of that investor’s total 13F portfolio is invested in AMT — a direct measure of their conviction.
Filings activity in AMT during Q1 2026, grouped by how each filer changed its position.
8 quarters of 13F filings · Δ columns show change vs prior quarter
| Quarter | Inst. Holders | Δ Holders | Ownership % | Δ Ownership | Total 13F Value | Δ Value |
|---|---|---|---|---|---|---|
| Q1 2026 | 1,716 | 0.2% | 80.64% | 1.60 pp | $70.32B | 1.9% |
| Q4 2025 | 1,719 | 0.8% | 82.24% | 6.39 pp | $71.72B | 7.2% |
| Q3 2025 | 1,732 | 3.7% | 88.63% | 16.27 pp | $77.29B | 16% |
| Q2 2025 | 1,798 | +1.4% | 104.90% | +7.73 pp | $91.48B | +8.0% |
| Q1 2025 | 1,774 | +3.7% | 97.17% | +14.31 pp | $84.73B | +17% |
| Q4 2024 | 1,711 | 3.6% | 82.86% | 19.65 pp | $72.26B | 19% |
| Q3 2024 | 1,774 | +5.2% | 102.51% | 8.85 pp | $89.40B | 7.9% |
| Q2 2024 | 1,686 | — | 111.36% | — | $97.11B | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying AMT stock.
Based on Q1 2026 13F filings, institutional ownership of American Tower Corporation stands at 80.6%, held across 1,716 reporting institutions.
BlackRock, Inc. is the largest reported institutional holder of AMT, with approximately 44,954,137 shares worth $7.76B as of Q1 2026.
No marquee "smart money" managers (Berkshire, Burry, ARK, Tiger Global, Pershing Square, Baupost, etc.) currently appear among the top 25 institutional holders of AMT.
Our composite Smart Money Score for AMT is 23 out of 100 (Bearish). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
188 institutions opened new positions in AMT during Q1 2026, while 191 fully exited. 601 added to existing positions and 921 trimmed.
AMT institutional ownership fell by 1.60 percentage points quarter-over-quarter, with a net change of -3 holders.
The top 10 institutions account for 47.0% of all reported 13F value in AMT, and the top 25 account for 65.0%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
American Tower Corporation (AMT) Institutional Ownership