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. This page analyzes institutional buying and selling activity, new holdings, and sold-out positions among tracked filers. Notable filers include Cantillon Capital Management, Akre Capital Management, Sequoia Financial Advisors, Renaissance Technologies LLC, and Mairs & Power Growth Fund.

Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q4 2023Sequoia Financial AdvisorsBuy9,975101,253$21,858,392
Q4 2023Alapocas Investment PartnersBuy32133,572$7,247,523
Q4 2023Mairs & Power Growth FundSell-1882,211$477,311
Q3 2023Renaissance Technologies LLCSell-152,500529,739$87,116
Q3 2023Sequoia Financial AdvisorsBuy56,94091,278$15,010,726
Q3 2023Akre Capital ManagementBuy23,2776,768,224$1,113,034,437
Q3 2023Bill & Melinda Gates Foundation TrustBuy11,00011,000$1,808,950
Q3 2023Cantillon Capital ManagementSell-7,3131,867,131$307,049,693
Q3 2023Alapocas Investment PartnersBuy1,42033,251$5,468,127
Q3 2023Torray FundBuy49425,972$4,271,095
Q3 2023Mairs & Power Growth FundBuy1762,399$394,516
Q2 2023Akre Capital ManagementSell-253,7516,744,947$1,308,115,021
Q2 2023Cantillon Capital ManagementBuy111,9551,874,444$363,529,670
Q2 2023Renaissance Technologies LLCSell-105,500682,239$132,313
Q2 2023Sequoia Financial AdvisorsBuy30,30534,338$6,659,808
Q2 2023Parnassus Endeavor FundBuy24,6252,135,438$414,146,846
Q2 2023Alapocas Investment PartnersBuy25431,831$6,173,304
Q2 2023Torray FundBuy19125,478$4,941,203
Q2 2023Mairs & Power Growth FundBuy92,223$431,129
Q2 2023Matrix Private Capital GroupSell-31,150$224,869
Q1 2023Parnassus Endeavor FundBuy172,5522,110,813$431,323,528
Q1 2023Cantillon Capital ManagementSell-30,1041,762,489$360,147,002
Q1 2023Akre Capital ManagementBuy5,2716,998,698$1,430,113,949
Q1 2023Alapocas Investment PartnersBuy1,00431,577$6,452,444
Q1 2023Sequoia Financial AdvisorsSell-6384,033$824,133
Q1 2023Torray FundSell-17725,287$5,167,146
Q1 2023Matrix Private Capital GroupSell-161,153$235,507
Q4 2022Cantillon Capital ManagementSell-38,5061,792,593$379,778,753
Q4 2022Akre Capital ManagementBuy20,2406,993,427$1,481,627,444
Q4 2022Parnassus Endeavor FundSell-12,6371,938,261$410,639,975

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.

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