William Von Mueffling's Cantillon Capital Management fully exited its position in American Tower (AMT) during the second quarter of 2026, selling all 1.61 million of its shares. The complete divestment liquidated a stake that was previously valued at approximately $278.28 million and accounted for about 1.85% of Cantillon's reported portfolio.
This trade information was disclosed in a quarterly 13F filing with the SEC, which is required to be filed within 45 days of a quarter's end, meaning the trades occurred between April 1 and June 30, 2026. During that period, American Tower reported strong Q2 results on July 28, beating earnings estimates and raising its full-year outlook, citing robust leasing demand and record activity at its CoreSite data centers.