Stock Ownership/AMT

AMERICAN TOWER CORP (AMT): Ownership & Insider Activity

Hedge funds and institutional managers reporting a position in AMT · Real Estate. Based on the most recent 13F filing from each holder, sourced from SEC EDGAR.

Reported Holders
43
13F filers
Aggregate Value
$4.1B
Across holders
Last Price
$178.39
2026-08-24
Sector
Real Estate
GICS
Quarterly fund activity24 increased17 reduced0 exited
Institutional Holders of AMT
↗
43 holders
Manager⇅Type⇅Shares⇅Market Value▼% of Total⇅% of Portfolio⇅Action⇅QoQ Change⇅Quarter⇅
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP
CIK 0001164508
Hedge Fund4.60M$752.9M18.4%0.3%Added+$66.6MQ2 2026
Clearbridge Investments, LLC
CIK 0001348883
Hedge Fund3.74M$612.2M14.9%0.5%Added+$9.3MQ2 2026
AQR CAPITAL MANAGEMENT LLC
CIK 0001167557
Hedge Fund2.46M$402.4M9.8%0.1%Added$-398.9MQ2 2026
MILLENNIUM MANAGEMENT LLC
CIK 0001273087
Hedge Fund2.19M$358.3M8.7%0.1%Added+$191.2MQ2 2026
CITADEL ADVISORS LLC
CIK 0001423053
Hedge Fund1.37M$224.3M5.5%0.0%Added+$131.5MQ2 2026
MARSHALL WACE, LLP
CIK 0001318757
Hedge Fund1.34M$219.7M5.4%0.2%Added+$214.6MQ2 2026
Qube Research & Technologies Ltd
CIK 0001729829
Hedge Fund1.15M$188.4M4.6%0.2%Added+$185.8MQ2 2026
SHAW D E & CO INC
CIK 0001009207
Hedge Fund1.03M$168.2M4.1%0.1%Reduced$-137.4MQ2 2026
Man Group plc
CIK 0001637460
Hedge Fund989K$161.8M3.9%0.3%Added+$26.7MQ2 2026
Point72 Asset Management, L.P.
CIK 0001603466
Hedge Fund854K$139.6M3.4%0.2%Reduced+$132.1MQ2 2026
ARROWSTREET CAPITAL, LIMITED PARTNERSHIPAdded
Hedge Fund
$752.9M· 18.4% of total· 0.3% port· 4.60M sh· +$66.6M QoQ· Q2 2026
Clearbridge Investments, LLCAdded
Hedge Fund
$612.2M· 14.9% of total· 0.5% port· 3.74M sh· +$9.3M QoQ· Q2 2026
AQR CAPITAL MANAGEMENT LLCAdded
Hedge Fund
$402.4M· 9.8% of total· 0.1% port· 2.46M sh· $-398.9M QoQ· Q2 2026
MILLENNIUM MANAGEMENT LLCAdded
Hedge Fund
$358.3M· 8.7% of total· 0.1% port· 2.19M sh· +$191.2M QoQ· Q2 2026
CITADEL ADVISORS LLCAdded
Hedge Fund
$224.3M· 5.5% of total· 0.0% port· 1.37M sh· +$131.5M QoQ· Q2 2026
MARSHALL WACE, LLPAdded
Hedge Fund
$219.7M· 5.4% of total· 0.2% port· 1.34M sh· +$214.6M QoQ· Q2 2026
Qube Research & Technologies LtdAdded
Hedge Fund
$188.4M· 4.6% of total· 0.2% port· 1.15M sh· +$185.8M QoQ· Q2 2026
SHAW D E & CO INCReduced
Hedge Fund
$168.2M· 4.1% of total· 0.1% port· 1.03M sh· $-137.4M QoQ· Q2 2026
Man Group plcAdded
Hedge Fund
$161.8M· 3.9% of total· 0.3% port· 989K sh· +$26.7M QoQ· Q2 2026
Point72 Asset Management, L.P.Reduced
Hedge Fund
$139.6M· 3.4% of total· 0.2% port· 854K sh· +$132.1M QoQ· Q2 2026
Fisher Asset Management, LLCReduced
Institutional Manager
$135.5M· 3.3% of total· 0.0% port· 829K sh· $-148.5M QoQ· Q2 2026
BALYASNY ASSET MANAGEMENT LLCAdded
Hedge Fund
$87.9M· 2.1% of total· 0.1% port· 537K sh· +$16.7M QoQ· Q2 2026
ADAGE CAPITAL PARTNERS GP, L.L.C.Added
Hedge Fund
$79.4M· 1.9% of total· 0.1% port· 485K sh· +$10.8M QoQ· Q2 2026
VOLORIDGE INVESTMENT MANAGEMENT, LLCReduced
Hedge Fund
$78.6M· 1.9% of total· 0.3% port· 481K sh· $-50.8M QoQ· Q2 2026
TWO SIGMA INVESTMENTS, LPReduced
Hedge Fund
$70.6M· 1.7% of total· 0.1% port· 432K sh· +$70.2M QoQ· Q2 2026
TCW GROUP INCReduced
Hedge Fund
$55.5M· 1.4% of total· 0.4% port· 340K sh· +$40.3M QoQ· Q2 2026
Squarepoint Ops LLCAdded
Hedge Fund
$47.5M· 1.2% of total· 0.1% port· 290K sh· +$44.8M QoQ· Q2 2026
Holocene Advisors, LPAdded
Hedge Fund
$46.0M· 1.1% of total· 0.1% port· 281K sh· +$41.1M QoQ· Q2 2026
Gotham Asset Management, LLCAdded
Hedge Fund
$42.9M· 1.0% of total· 0.1% port· 263K sh· +$37.0M QoQ· Q2 2026
Verition Fund Management LLCAdded
Hedge Fund
$41.4M· 1.0% of total· 0.2% port· 253K sh· +$39.0M QoQ· Q2 2026
PineBridge Investments, L.P.Added
Hedge Fund
$36.6M· 0.9% of total· 0.3% port· 190K sh· +$8.8M QoQ· Q3 2025
TUDOR INVESTMENT CORP ET ALAdded
Hedge Fund
$32.4M· 0.8% of total· 0.0% port· 198K sh· +$31.5M QoQ· Q2 2026
BROOKFIELD Corp /ON/Reduced
Hedge Fund
$31.0M· 0.8% of total· 0.0% port· 190K sh· $-4.7M QoQ· Q2 2026
Walleye Capital LLCAdded
Hedge Fund
$28.8M· 0.7% of total· 0.1% port· 176K sh· +$26.2M QoQ· Q2 2026
Rockefeller Capital Management L.P.Reduced
Hedge Fund
$16.0M· 0.4% of total· 0.0% port· 98K sh· $-54.7M QoQ· Q2 2026
BAILLIE GIFFORD & COReduced
Institutional Manager
$7.5M· 0.2% of total· 0.0% port· 46K sh· $-678K QoQ· Q2 2026
Schonfeld Strategic Advisors LLCAdded
Hedge Fund
$6.1M· 0.1% of total· 0.0% port· 38K sh· — QoQ· Q2 2026
Bridgewater Associates, LPReduced
Hedge Fund
$5.9M· 0.1% of total· 0.0% port· 36K sh· $-3.4M QoQ· Q2 2026
AKRE CAPITAL MANAGEMENT LLCReduced
Institutional Manager
$4.8M· 0.1% of total· 0.1% port· 29K sh· $-3.5M QoQ· Q2 2026
GAMCO INVESTORS, INC. ET ALReduced
Institutional Manager
$3.8M· 0.1% of total· 0.0% port· 23K sh· $-195K QoQ· Q2 2026
JUPITER ASSET MANAGEMENT LTDAdded
Hedge Fund
$3.7M· 0.1% of total· 0.0% port· 23K sh· +$166K QoQ· Q2 2026
Brevan Howard Capital Management LPAdded
Hedge Fund
$3.4M· 0.1% of total· 0.0% port· 21K sh· +$1.6M QoQ· Q2 2026
Parallax Volatility Advisers, L.P.Added
Hedge Fund
$3.2M· 0.1% of total· 0.0% port· 20K sh· +$3.2M QoQ· Q2 2026
Ancora Advisors, LLCReduced
Hedge Fund
$2.3M· 0.1% of total· 0.0% port· 14K sh· +$602K QoQ· Q2 2026
Magnetar Financial LLCAdded
Hedge Fund
$704K· 0.0% of total· 0.0% port· 4K sh· — QoQ· Q2 2026
Hudson Bay Capital Management LPReduced
Hedge Fund
$514K· 0.0% of total· 0.0% port· 3K sh· $-11.0M QoQ· Q2 2026
Bridgewater Advisors Inc.Reduced
Hedge Fund
$363K· 0.0% of total· 0.0% port· 2K sh· $-17K QoQ· Q2 2026
ArrowMark Colorado Holdings LLCUnchanged
Hedge Fund
$362K· 0.0% of total· 0.0% port· 2K sh· +$0 QoQ· Q2 2026
CAPSTONE INVESTMENT ADVISORS, LLCAdded
Hedge Fund
$324K· 0.0% of total· 0.0% port· 2K sh· $-3.9M QoQ· Q2 2026
Lighthouse Investment Partners, LLCReduced
Hedge Fund
$298K· 0.0% of total· 0.0% port· 2K sh· $-6.3M QoQ· Q2 2026
Eisler Capital (UK) Ltd.Reduced
Hedge Fund
$270K· 0.0% of total· 0.0% port· 1K sh· $-2.1M QoQ· Q3 2024
CAXTON ASSOCIATES LLPAdded
Hedge Fund
$202K· 0.0% of total· 0.0% port· 1K sh· +$8K QoQ· Q2 2026
Fulcrum Asset Management LLPUnchanged
Hedge Fund
$72K· 0.0% of total· 0.0% port· 427 sh· +$0 QoQ· Q2 2026
1–10 of 43
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