6 institutions reported holding $99.6M of AMERICAN TOWER CORP (AMT-PA) in SEC 13F filings for 2026-06-30. Largest institutional holders: IMC-Chicago, LLC ($65.8M), JPMORGAN CHASE & CO ($14.8M), GROUP ONE TRADING LLC ($10.8M), SIMPLEX TRADING, LLC ($8.1M), SG Americas Securities, LLC ($0). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | IMC-Chicago, LLC | $65.8M | 402,400 | Added |
| 2 | JPMORGAN CHASE & CO | $14.8M | 87,700 | New |
| 3 | GROUP ONE TRADING LLC | $10.8M | 66,200 | Trimmed |
| 4 | SIMPLEX TRADING, LLC | $8.1M | 49,700 | Trimmed |
| 5 | SG Americas Securities, LLC | $0 | 0 | Exited |
| 6 | Maven Securities LTD | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-06-30