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 13F filings (Q1 2026). 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
Q2 2016Renaissance Technologies LLCBuy82,100594,439$67,534
Q2 2016Akre Capital ManagementSell-10,8496,302,526$729,643
Q1 2016Cantillon Capital ManagementBuy755,900755,900$77,382
Q1 2016Torray FundBuy186,615589,116$60,308
Q1 2016Renaissance Technologies LLCBuy56,900512,339$52,448
Q1 2016Akre Capital ManagementBuy4,3596,313,375$646,300
Q4 2015Meritage GroupSell-676,4672,524,868$244,786
Q4 2015Renaissance Technologies LLCSell-276,700455,439$44,155
Q4 2015Akre Capital ManagementBuy5,5236,309,016$611,659
Q4 2015Torray FundBuy2,135402,501$39,022
Q3 2015Akre Capital ManagementBuy1,029,4796,303,493$554,581
Q3 2015Renaissance Technologies LLCBuy721,000732,139$64,414
Q3 2015Meritage GroupBuy3,4883,201,335$281,653
Q3 2015Torray FundSell-2,940400,366$35,224
Q2 2015Akre Capital ManagementBuy1,221,4615,274,014$492,013
Q2 2015Meritage GroupBuy822,1163,197,847$298,327
Q2 2015Renaissance Technologies LLCSell-158,10011,139$1,039
Q2 2015Torray FundBuy124,122403,306$37,624
Q1 2015Renaissance Technologies LLCSell-541,100169,239$15,934
Q1 2015Meritage GroupBuy506,6712,375,731$223,675
Q1 2015Akre Capital ManagementBuy35,4724,052,553$383,088
Q1 2015Torray FundSell-29,685279,184$26,285
Q4 2014Renaissance Technologies LLCBuy357,400710,339$70,217
Q4 2014Torray FundBuy17,712308,869$30,532
Q4 2014Meritage GroupBuy8631,869,060$184,757
Q4 2014Akre Capital ManagementSell-2904,017,081$397,088
Q3 2014Renaissance Technologies LLCBuy100,300352,939$33,046
Q3 2014Torray FundBuy31,345291,157$27,261
Q3 2014Akre Capital ManagementSell-7,2254,017,371$376,146
Q3 2014Meritage GroupBuy4151,868,197$174,919

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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