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American Tower Corp

AMT
Exchange
NYSE
Industry
Real Estate Investment Trusts
SEC CIK
0001053507

In the last 90 days, American Tower Corp insiders filed 2 open-market purchases and 2 sales; 1,767 institutions reported holding it in 13F filings for Q2 2026, worth $72.0B in total; Akre Capital Management is the only superinvestor holding it.

Holders of 5% or more of AMT

Holders whose latest Schedule 13D or 13G filing reports 5% or more of American Tower Corp, largest stake first. The change is against the holder's previous filing.

Holders of 5% or more of AMT
HolderLatest formStakeChangeFirst filedLatest filingFiling
BlackRock, Inc.13G/A9.20%43.0M shares–Feb 5, 20251 filingFeb 5, 2025SEC
Vanguard Capital Management LLC13G7.56%35.2M sharesNewApr 29, 20261 filingApr 29, 2026SEC
Vanguard Portfolio Management LLC13G5.94%27.7M sharesNewApr 28, 20261 filingApr 28, 2026SEC

Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.

13D and 13G filings

12 Schedule 13D and 13G filings on American Tower Corp, newest first, including old-format filings without a stake.

Schedule 13D and 13G filings on AMT
Filed (ET)FilerFormStakeChangeEvent dateFiling
Apr 29, 20264:41 PM ETVanguard Capital Management LLC13G7.56%35.2M sharesNewMar 31, 2026SEC
Apr 28, 20264:06 PM ETVanguard Portfolio Management LLC13G5.94%27.7M sharesNewMar 31, 2026SEC
Mar 26, 20263:44 PM ETVanguard Group Inc13G/A0.00%0 shares–Below 5%Mar 13, 2026SEC
Feb 5, 20251:23 PM ETBlackRock, Inc.13G/A9.20%43.0M shares–Dec 31, 2024SEC
Feb 13, 2024Vanguard Group Inc13G/AOld format–––SEC
Jan 26, 202411:49 AM ETBlackRock Inc.13G/AOld format–––SEC
Feb 9, 2023Vanguard Group Inc13G/AOld format–––SEC
Jan 31, 20231:58 PM ETBlackRock Inc.13G/AOld format–––SEC
Feb 9, 2022Vanguard Group Inc13G/AOld format–––SEC
Feb 1, 20225:14 PM ETBlackRock Inc.13G/AOld format–––SEC
Feb 10, 2021Vanguard Group Inc13G/AOld format–––SEC
Jan 28, 20215:55 PM ETBlackRock Inc.13G/AOld format–––SEC

Form 144: proposed insider sales

40 notices from officers, directors and other affiliates planning to sell American Tower Corp shares, newest first.

Form 144 notices for AMT
Filed (ET)SellerShares to sellMarket valuePlanned saleBrokerFiling
Oct 30, 20264:23 PM ETJuan Font HernandezOfficer592$112.3KOct 30, 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesSEC
Oct 28, 20264:18 PM ETRuth T DowlingOfficer1.58K$290.1KOct 28, 202610b5-1Morgan Stanley Smith Barney LLC Executive Financial ServicesSEC
Jul 29, 20264:19 PM ETRobert MeyerOfficer5.00K$894.4KJul 29, 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesSEC
Jul 28, 20264:28 PM ETRuth T DowlingOfficer1.79K$298.6KJul 28, 202610b5-1Morgan Stanley Smith Barney LLC Executive Financial ServicesSEC
Mar 4, 20264:20 PM ETSteven O VondranOfficer · Director33.5K$6.31MMar 4, 202610b5-1Morgan Stanley Smith Barney LLC Executive Financial ServicesSEC
Mar 2, 20264:15 PM ETEugene NoelOfficer41.2K$7.87MMar 2, 202610b5-1Morgan Stanley Smith Barney LLC Executive Financial ServicesSEC
Feb 27, 20265:33 PM ETRuth T DowlingOfficer2.31K$427.4KFeb 27, 202610b5-1Morgan Stanley Smith Barney LLC Executive Financial ServicesSEC
Feb 27, 20264:16 PM ETRobert MeyerOfficer4.45K$831.7KFeb 27, 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesSEC
Feb 25, 20265:21 PM ETOlivier Puech TrustEVP Latin America17.7K$3.23MFeb 25, 2026UBS Financial Services IncSEC
Feb 17, 20264:20 PM ETRodney SmithOfficer34.3K$6.60MFeb 17, 202610b5-1Morgan Stanley Smith Barney LLC Executive Financial ServicesSEC
Jul 31, 20254:34 PM ETJuan Font HernandezOfficer720$150.0KJul 31, 2025Morgan Stanley Smith Barney LLC Executive Financial ServicesSEC
Mar 17, 20254:21 PM ETGoel SanjayOfficer4.00K$863.7KMar 17, 2025Morgan Stanley Smith Barney LLC Executive ServicesSEC
Feb 27, 20255:11 PM ETMeyer Robert Joseph JROfficer2.94K$594.2KFeb 27, 2025Morgan Stanley Smith Barney LLC Executive ServicesSEC
Feb 26, 20255:02 PM ETMeyer Robert Joseph JROfficer2.72K$547.8KFeb 26, 2025Morgan Stanley Smith Barney LLC Executive ServicesSEC
Feb 26, 20254:42 PM ETReeve Pamela D ADirector4.97K$1.01MFeb 26, 2025Morgan Stanley Smith Barney LLC Executive ServicesSEC
Feb 13, 20254:02 PM ETRodney SmithOfficer16.6K$3.14MFeb 13, 202510b5-1Morgan Stanley Smith Barney LLC Executive Financial ServicesSEC
Jan 16, 20254:04 PM ETRodney SmithOfficer16.6K$3.00MJan 16, 202510b5-1Morgan Stanley Smith Barney LLC Executive Financial ServicesSEC
Sep 13, 20244:47 PM ETGoel SanjayOfficer5.00K$1.19MSep 13, 2024Morgan Stanley Smith Barney LLC Executive ServicesSEC
Sep 10, 20244:02 PM ETEugene NoelOfficer33.1K$7.95MSep 10, 202410b5-1Morgan Stanley Smith Barney LLC Executive Financial ServicesSEC
Sep 3, 20244:05 PM ETPuech OlivierOfficer19.0K$4.37MSep 3, 202410b5-1UBS Financial Services, Inc.SEC
Aug 26, 20244:02 PM ETPuech OlivierOfficer9.99K$2.27MAug 26, 202410b5-1UBS Financial Services, Inc.SEC
Aug 2, 20244:58 PM ETMeyer Robert Joseph JROfficer2.18K$508.0KAug 2, 2024MORGAN STANLEY SMITH BARNEY LLC EXECUTIVE SERVICESSEC
Aug 2, 20244:58 PM ETGoel SanjayOfficer4.79K$1.13MAug 2, 2024Morgan Stanley Smith Barney LLC Executive ServicesSEC
Aug 2, 20244:05 PM ETPuech OlivierOfficer10.0K$2.30MAug 2, 202410b5-1UBS Financial Services, Inc.SEC
Aug 2, 20244:02 PM ETSteven O VondranOfficer · Director21.5K$4.95MAug 2, 202410b5-1Morgan Stanley Smith Barney LLC Executive Financial ServicesSEC

Showing the latest 25. See the AMT notices from the last 12 months