AMERICAN TOWER CORP (AMT) Institutional Ownership Changes & 13F Activity

AMERICAN TOWER CORP (AMT). Institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC Form 13F filings (Q3 2026). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions in the latest reporting period. Notable filers include State Street Corp, Manufacturers Life Insurance Company, The, Citadel Advisors Llc, Envestnet Asset Management Inc, and California State Teachers Retirement System.

InstitutionTypeChange in sharesChange Position %SharesReported stock balancePortfolio quarterFiling date
Coastline Trust CoSell-1,750-92.1%151$24.72KQ3 2026Oct 01, 2026
Stonebridge Financial Group, LlcBuy+510+3.2%16,399$2.68MQ3 2026Oct 01, 2026
Hickory Point Bank & TrustBuy+300—300$49.11KQ3 2026Oct 01, 2026
Montecito Bank & TrustSell-110-7.5%1,360$222.62KQ3 2026Oct 01, 2026
Roxbury Financial LlcBuy+1+0.7%140$22.97KQ3 2026Oct 01, 2026
Cim Investment Management IncSell-5,311-100.0%0$0.00Q3 2026Sep 29, 2026
Envestnet Asset Management IncSell-1,103,567-100.0%0$0.00Q3 2026Sep 23, 2026
Envestnet Portfolio Solutions, Inc.Sell-14,398-100.0%0$0.00Q3 2026Sep 23, 2026
Qrg Capital Management, Inc.Sell-8,847-100.0%0$0.00Q3 2026Sep 23, 2026
State Street CorpSell-22,066,202-100.0%0$0.00Q3 2026Sep 22, 2026
Andra Ap-FondenSell-44,485-100.0%0$0.00Q3 2026Sep 22, 2026
Silicon Valley Capital PartnersSell-25-100.0%0$0.00Q3 2026Sep 21, 2026
Anchor Investment Management, LlcSell-1,413-100.0%0$0.00Q3 2026Sep 15, 2026
Cherry Tree Wealth Management, LlcSell-38-100.0%0$0.00Q3 2026Sep 15, 2026
Manufacturers Life Insurance Company, TheSell-1,872,067-100.0%0$0.00Q3 2026Sep 09, 2026
Integrated Wealth Concepts LlcSell-77,512-100.0%0$0.00Q3 2026Sep 09, 2026
Parkside Financial Bank & TrustSell-2,245-100.0%0$0.00Q3 2026Sep 04, 2026
Anchor Capital Advisors LlcSell-70,867-100.0%0$0.00Q3 2026Sep 03, 2026
Citadel Advisors LlcSell-1,371,292-100.0%0$0.00Q3 2026Sep 02, 2026
Allianz Asset Management GmbhSell-482,190-100.0%0$0.00Q3 2026Sep 02, 2026
Second Line Capital, LlcSell-18,630-100.0%0$0.00Q3 2026Sep 02, 2026
Brown, Lisle/Cummings, Inc.Sell-366-100.0%0$0.00Q3 2026Sep 02, 2026
Cornerstone Financial Management LlcSell-88-100.0%0$0.00Q3 2026Aug 28, 2026
Corient Private Wealth LlcSell-505,701-100.0%0$0.00Q3 2026Aug 27, 2026
Groupe La FrancaiseSell-33,505-100.0%0$0.00Q3 2026Aug 25, 2026
California State Teachers Retirement SystemSell-715,369-100.0%0$0.00Q3 2026Aug 24, 2026
Vancity Investment Management LtdSell-36,056-100.0%0$0.00Q3 2026Aug 24, 2026
Cyber Hornet Etfs LlcSell-1,271-100.0%0$0.00Q3 2026Aug 24, 2026
Assenagon Asset Management S.A.Sell-20,160-100.0%0$0.00Q3 2026Aug 21, 2026
Rehmann Capital Advisory GroupSell-1,405-100.0%0$0.00Q3 2026Aug 20, 2026
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Frequently asked questions about AMT activity

  • Which institutional owners are buying AMT?

    Institutional owners buying AMT include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.

  • What does "buy" mean in AMT activity?

    "Buy" means an investor increased their reported position in AMT compared to the prior reporting period. This reflects growing exposure to AMERICAN TOWER CORP (AMT) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in AMT increasing?

    Institutional interest in AMT can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.