Ownership history in Cornerstone Advisors, LLC · 20 quarters on record
This page tracks every 13F SEC filing in which Cornerstone Advisors, LLC reported a position in AMERICAN TOWER CORP (AMT). Data includes quarterly share count, position size as % of portfolio, estimated market value, and end-of-quarter stock price — sourced directly from SEC EDGAR 13F filings.
| Quarter | Action | Shares | Change | Chg % | % of Fund | Mkt Value | Price (EOQ) |
|---|---|---|---|---|---|---|---|
| 2025 Q3 | REDUCED | 15,700 | -1,300 | -7.6% | 0.10% | $3.0M | $190.47 |
| 2025 Q2 | REDUCED | 17,000 | -2,400 | -12.4% | 0.13% | $3.8M | $216.98 |
| 2025 Q1 | ADDED | 19,400 | +9,100 | +88.3% | 0.18% | $4.2M | $210.22 |
| 2024 Q4 | UNCHANGED | 10,300 | — | 0% | 0.08% | $1.9M | $177.19 |
| 2024 Q3 | ADDED | 10,300 | +3,500 | +51.5% | 0.09% | $2.4M | $221.09 |
| 2024 Q2 | REDUCED | 6,800 | -3,400 | -33.3% | 0.05% | $1.3M | $184.79 |
| 2024 Q1 | UNCHANGED | 10,200 | — | 0% | 0.08% | $2.0M | $184.64 |
| 2023 Q4 | REDUCED | 10,200 | -2,000 | -16.4% | 0.10% | $2.2M | $201.73 |
| 2023 Q3 | REDUCED | 12,200 | -47,800 | -79.7% | 0.09% | $2.0M | $150.94 |
| 2022 Q4 | UNCHANGED | 60,000 | — | 0% | 0.63% | $12.7M | $191.45 |
As of 2025 Q4 — sorted by position size