Citable ownership snapshot
AMT's latest 13F holder table lists Viking Global Investors as the largest holder in this view with 2,797,125 shares valued at $618.22M.
| Holder | Report date | Value | Portfolio weight |
|---|---|---|---|
| Viking Global Investors | Mar 31, 2025 | $618.22M | 1.8% |
| AQR Capital Management | Jun 30, 2026 | $402.45M | 0.1% |
| Millennium Management | Jun 30, 2026 | $366.08M | 0.1% |
| Citadel Advisors | Jun 30, 2026 | $324.65M | 0.0% |
| D.E. Shaw & Co. | Jun 30, 2026 | $168.22M | 0.1% |
| Point72 Asset Management | Jun 30, 2026 | $140.08M | 0.2% |
| Balyasny Asset Management | Jun 30, 2026 | $87.91M | 0.1% |
| Two Sigma Investments | Jun 30, 2026 | $70.64M | 0.1% |
Source: SEC EDGAR 13F filings; period Mar 31, 2025; filed Aug 14, 2025.
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