AMT
American Tower Corp /Ma/Company with tickers: AMT
CIK
1053507
CUSIP
03027X100
Shares Outstanding
465,893,069
Price History
Institutional Holders
Short Volume
Short Interest
Fails to Deliver
Financials
SEC Filings
Earnings Calls
Insider Trades
Congressional Trades
Holders: 7
Total Value: $107,934,807
Total Shares: 625,419
Institutional Ownership Trend
Holder Concentration
Across 7 13F filers · Δ vs Dec 31, 2025Top Holder
78.4%
+65.8 pts
Top 5
100.0%
+70.4 pts
Top 10
100.0%
+61.1 pts
HHI
6,538
Highly concentrated
+6,247
Quarterly Activity
vs Dec 31, 2025
New
6
Increased
0
Decreased
1
Sold Out
1,721
Unchanged
0
Holder count:
-1,715
Institutional value:
-99.8%
Shares held:
-99.8%
Top Buyers
vs Dec 31, 2025No qualifying movers this quarter.
Top Sellers
vs Dec 31, 2025| Institution | Sold | Now Holds |
|---|---|---|
| Small Essential Partners LLC | −1,289 | 121 |
Top New Positions
vs Dec 31, 2025| Institution | Acquired | Value (USD) |
|---|---|---|
| Mid Liontrust Investment Partners LLP | 490,236 | $84,604,928 |
| Mid GROUPAMA ASSET MANAGMENT | 123,868 | $21,377,139 |
| Mid Groupe la Francaise | 7,997 | $1,380,122 |
| Mid SUMMITRY LLC | 1,636 | $282,340 |
| Mid CCM INVESTMENT ADVISERS LLC | 1,410 | $243,337 |
Top Sold-Out Positions
vs Dec 31, 2025| Institution | Previously Held | Last Value (USD) |
|---|---|---|
| Mega BlackRock, Inc. | 44,034,756 | $7,731,182,101 |
| Mega STATE STREET CORP | 20,987,534 | $3,684,781,344 |
| Mega GEODE CAPITAL MANAGEMENT, LLC | 13,499,035 | $2,370,025,574 |
| Large COHEN & STEERS, INC. | 12,487,087 | $2,192,357,864 |
| Mega FMR LLC | 12,018,839 | $2,110,147,560 |
| Holder | Value (USD) | % of 13F | Shares | Activity | Type | Discretion | Filed | Action |
|---|---|---|---|---|---|---|---|---|
| Mid Liontrust Investment Partners LLP | $84,604,928 | 78.39% | 490,236 | First | Shares | Sole | 2026-05-20 | View |
| Mid GROUPAMA ASSET MANAGMENT | $21,377,139 | 19.81% | 123,868 | First | Shares | Sole | 2026-05-22 | View |
| Mid Groupe la Francaise | $1,380,122 | 1.28% | 7,997 | First | Shares | Defined | 2026-05-21 | View |
| Mid SUMMITRY LLC | $282,340 | 0.26% | 1,636 | First | Shares | Sole | 2026-05-22 | View |
| Mid CCM INVESTMENT ADVISERS LLC | $243,337 | 0.23% | 1,410 | First | Shares | Sole | 2026-05-20 | View |
| Small SOA Wealth Advisors, LLC. | $26,059 | 0.02% | 151 | First | Shares | Sole | 2026-05-20 | View |
| Small Essential Partners LLC | $20,882 | 0.02% | 121 | Reduced | Shares | Sole | 2026-05-21 | View |
| No holders match your search. | ||||||||