{"url_path":"/sec/amt/8-k/2026-05-21/cover-page","section_key":"cover-page","section_title":"Cover Page","topic":"sec","document":{"doc_type":"8-K","doc_date":"2026-05-21","source_url":"https://www.sec.gov/Archives/edgar/data/1053507/0001053507-26-000116-index.html","accession_number":"0001053507-26-000116","cik":"0001053507","ticker":"AMT","issuer_name":"AMERICAN TOWER CORP /MA/","edgar_url":"https://www.sec.gov/Archives/edgar/data/1053507/0001053507-26-000116-index.html","primary_entity_key":"0001053507","primary_entity_name":"AMERICAN TOWER CORP /MA/"},"word_count":421,"has_tables":true,"body_markdown":"amt-20260520\nAMERICAN TOWER CORP /MA/0001053507false00010535072026-05-202026-05-200001053507exch:XNYSus-gaap:CommonStockMember2026-05-202026-05-200001053507exch:XNYSamt:A1950SeniorNotesDue2026Member2026-05-202026-05-200001053507exch:XNYSamt:A0450SeniorNotesDue2027Member2026-05-202026-05-200001053507exch:XNYSamt:A0400SeniorNotesDue2027Member2026-05-202026-05-200001053507exch:XNYSamt:A4125SeniorNotesDue2027Member2026-05-202026-05-200001053507exch:XNYSamt:A0500SeniorNotesDue2028Member2026-05-202026-05-200001053507exch:XNYSamt:A0875SeniorNotesDue2029Member2026-05-202026-05-200001053507exch:XNYSamt:A0950SeniorNotesDue2030Member2026-05-202026-05-200001053507exch:XNYSamt:A3.900SeniorNotesDue2030Member2026-05-202026-05-200001053507exch:XNYSamt:A4625SeniorNotesDue2031Member2026-05-202026-05-200001053507exch:XNYSamt:A1.000SeniorNotesDue2032Member2026-05-202026-05-200001053507exch:XNYSamt:A3.625SeniorNotesDue2032Member2026-05-202026-05-200001053507exch:XNYSamt:A1250SeniorNotesDue2033Member2026-05-202026-05-200001053507exch:XNYSamt:A4.100SeniorNotesDue2034Member2026-05-202026-05-20\n\nUNITED STATES\n\nSECURITIES AND EXCHANGE COMMISSION\n\nWASHINGTON D.C. 20549\n\nFORM 8-K\n\nCURRENT REPORT PURSUANT\n\nTO SECTION 13 OR 15(d) OF THE\n\nSECURITIES EXCHANGE ACT OF 1934\n\nDate of Report (Date of Earliest Event Reported): May 20, 2026\n\nAMERICAN TOWER CORPORATION\n\n(Exact Name of Registrant as Specified in Charter)\n\nDelaware\n\n001-14195\n\n65-0723837\n\n(State or Other Jurisdiction of Incorporation)\n\n(Commission File Number)\n\n(I.R.S. Employer Identification No.)\n\n222 Berkeley Street\n\nBoston, Massachusetts 02116\n\n(Address of Principal Executive Offices) (Zip Code)\n\n(617) 375-7500\n\n(Registrant's telephone number, including area code)\n\nNot Applicable\n\n(Former name or former address, if changed since last report.)\n\nCheck the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):\n\n☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)\n\n☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)\n\n☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))\n\n☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))\n\nSecurities registered pursuant to Section 12(b) of the Act:\n\nTitle of each classTrading Symbol(s)Name of each exchange on which registered\n\nCommon Stock, $0.01 par value AMTNew York Stock Exchange\n\n1.950% Senior Notes due 2026AMT 26BNew York Stock Exchange\n\n0.450% Senior Notes due 2027AMT 27CNew York Stock Exchange\n\n0.400% Senior Notes due 2027AMT 27DNew York Stock Exchange\n\n4.125% Senior Notes due 2027AMT 27FNew York Stock Exchange\n\n0.500% Senior Notes due 2028AMT 28ANew York Stock Exchange\n\n0.875% Senior Notes due 2029AMT 29BNew York Stock Exchange\n\n0.950% Senior Notes due 2030AMT 30CNew York Stock Exchange\n\n3.900% Senior Notes due 2030AMT 30DNew York Stock Exchange\n\n4.625% Senior Notes due 2031AMT 31BNew York Stock Exchange\n\n1.000% Senior Notes due 2032AMT 32New York Stock Exchange\n\n3.625% Senior Notes due 2032AMT 32BNew York Stock Exchange\n\n1.250% Senior Notes due 2033AMT 33New York Stock Exchange\n\n4.100% Senior Notes due 2034AMT 34ANew York Stock Exchange\n\nIndicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).\n\nEmerging growth company ☐\n\nIf an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.☐"}