American Tower Corporation

AMT·NYSE·$184.95Share Price as of 11/2·$86BMarket Cap as of 11/2

Financials

10-QQ3 ended 09/30/2610/27/26 10-QQ2 ended 06/30/2607/28/26 10-QQ1 ended 03/31/2604/28/26 10-KFY 202502/24/26 10-QQ3 ended 09/30/2510/28/25

Disclosures

8-KCurrent report10/27/26 8-KCurrent report09/18/26 8-KCurrent report09/14/26 8-KCurrent report09/09/26 8-KCurrent report07/28/26

Prospectuses and Registrations

424B2Prospectus for primary offering09/10/26 424B5Prospectus supplement09/09/26 FWPFree writing prospectus09/09/26 S-8Registration of securities for employees05/26/26 424B2Prospectus for primary offering05/20/26

Proxies

DEFA14AAdditional proxy materials04/28/26 DEF 14ADefinitive proxy04/08/26 DEFA14AAdditional proxy materials04/08/26 DEF 14ADefinitive proxy04/02/25 DEFA14AAdditional proxy materials04/02/25

Ownership

144Proposed sale of securities10/30/26 Form 4Insider transaction10/30/26 144Proposed sale of securities10/28/26 Form 4Insider transaction10/22/26 Form 4Insider transaction10/05/26

Other

CERTCEO/CFO certification06/08/26 8-A12B8-A12B05/27/26 25-NSERemoval from listing05/22/26 ARSAnnual report to shareholders04/08/26 CERTCEO/CFO certification06/02/25