{"data":[{"accessionNo":"0002100119-26-000148","formType":"SCHEDULE 13G","amendmentNo":null,"issuerCik":"0001053507","issuerName":"American Tower Corp","ticker":"AMT","cusip":"03027X100","securityClass":"Common Stock","eventDate":"2026-03-31","reportingPerson":"Vanguard Capital Management","reportingCik":null,"personType":"IA","sharesOwned":35245879,"percentOfClass":7.56,"filedAt":"2026-04-29","canonicalUrl":"https://xoomar.com/markets/stocks/amt"},{"accessionNo":"0002100121-26-000094","formType":"SCHEDULE 13G","amendmentNo":null,"issuerCik":"0001053507","issuerName":"American Tower Corp","ticker":"AMT","cusip":"03027X100","securityClass":"Common Stock","eventDate":"2026-03-31","reportingPerson":"Vanguard Portfolio Management","reportingCik":null,"personType":"IA","sharesOwned":27718958,"percentOfClass":5.94,"filedAt":"2026-04-28","canonicalUrl":"https://xoomar.com/markets/stocks/amt"},{"accessionNo":"0000102909-26-000653","formType":"SCHEDULE 13G/A","amendmentNo":11,"issuerCik":"0001053507","issuerName":"American Tower Corp","ticker":"AMT","cusip":"03027X100","securityClass":"Common Stock","eventDate":"2026-03-13","reportingPerson":"The Vanguard Group","reportingCik":null,"personType":"IA","sharesOwned":0,"percentOfClass":0,"filedAt":"2026-03-26","canonicalUrl":"https://xoomar.com/markets/stocks/amt"}],"updatedAt":"2026-10-29T06:59:52.099Z","source":"xoomar.com","docs":"https://xoomar.com/markets/api","license":"https://xoomar.com/terms","attribution":"Credit XOOMAR with a link to the dataset page on xoomar.com when you republish this data","canonicalUrl":"https://xoomar.com/markets/stocks/amt","meta":{"source":"SEC","sourceAttribution":"Schedule 13D and 13G data: SEC.","notice":"10 requests a minute without a key, 30 with a free key. Get a free key at https://xoomar.com/signup?utm_source=api, register your app at https://xoomar.com/developers/register?utm_source=api, and credit the data as \"Data: XOOMAR\" together with the sourceAttribution line."}}