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
Q3 2019Sequoia Financial AdvisorsBuy71,440$318
Q2 2019Renaissance Technologies LLCSell-581,5001,774,000$362,694
Q2 2019Cantillon Capital ManagementSell-43,9542,137,968$437,107
Q2 2019Torray FundSell-5,667119,662$24,465
Q2 2019Akre Capital ManagementSell-3007,186,528$1,469,286
Q2 2019Dodge & Cox Stock FundSell-1001,825$373
Q2 2019Sequoia Financial AdvisorsBuy541,433$293
Q1 2019Renaissance Technologies LLCSell-741,7002,355,500$464,175
Q1 2019Akre Capital ManagementBuy119,4007,186,828$1,416,236
Q1 2019Cantillon Capital ManagementSell-8,4342,181,922$429,970
Q1 2019Torray FundSell-3,146125,329$24,697
Q1 2019Sequoia Financial AdvisorsBuy1,3791,379$272
Q1 2019Dodge & Cox Stock FundSell-3001,925$379
Q4 2018Renaissance Technologies LLCBuy114,5613,097,200$489,946
Q4 2018Torray FundSell-17,675128,475$20,323
Q4 2018Cantillon Capital ManagementBuy16,0162,190,356$346,492
Q4 2018Akre Capital ManagementSell-6207,067,428$1,117,996
Q4 2018Dodge & Cox Stock FundSell-4002,225$352
Q3 2018Cantillon Capital ManagementSell-145,1122,174,340$315,932
Q3 2018Renaissance Technologies LLCBuy74,3392,982,639$433,377
Q3 2018Torray FundSell-3,340146,150$21,236
Q3 2018Akre Capital ManagementSell-3,2717,068,048$1,026,987
Q3 2018Dodge & Cox Stock FundBuy2,6252,625$381
Q3 2018Mairs & Power Growth FundBuy2003,345$486
Q2 2018Cantillon Capital ManagementSell-64,9762,319,452$334,396
Q2 2018Akre Capital ManagementBuy15,1087,071,319$1,019,472
Q2 2018Torray FundSell-9,342149,490$21,552
Q1 2018Meritage GroupSell-1,973,381551,487$80,153
Q1 2018Akre Capital ManagementBuy264,0247,056,211$1,025,550
Q1 2018Renaissance Technologies LLCBuy204,4002,908,300$422,692

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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