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Equibles

AMT

American Tower Corp /Ma/

Company with tickers: AMT

CIK
1053507
CUSIP
03027X100
Shares Outstanding
465,893,069
13F Activity (30d)
400 filings 374 filers

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 1,654
Total Value: $44,212,681,468
Total Shares: 256,186,595
Showing 1–100 of 1,696 holdings by value · page 1 of 17

Institutional Ownership Trend

25 quarters

Superinvestors Holding AMT

All superinvestors →
Ray Dalio $9,822,218 Chuck Akre $8,762,231 Joel Greenblatt $6,262,755 Mario Gabelli $4,313,403

Holder Concentration

Across 1,654 13F filers · Δ vs Dec 31, 2025
Top Holder
13.7%
Jun 2023 → Mar 2026 · range 10.6% – 14.8%
+3.1 pts
Top 5
36.6%
Jun 2023 → Mar 2026 · range 27.1% – 37.1%
+9.4 pts
Top 10
47.6%
Jun 2023 → Mar 2026 · range 38.7% – 48.6%
+8.9 pts
HHI
391
Jun 2023 → Mar 2026 · range 245 – 435
Broadly held+146

Quarterly Activity

vs Dec 31, 2025
New
155
Increased
681
Decreased
601
Sold Out
202
Unchanged
217
Holder count: -47
Institutional value: +27.7%
Shares held: +29.9%

Top Buyers

vs Dec 31, 2025
Institution Added Now Holds Open
Large LAZARD ASSET MANAGEMENT LLC +1,240,780 7,325,943
Mega DEUTSCHE BANK AG\ +860,052 7,769,353
Mega RAYMOND JAMES FINANCIAL INC +547,468 1,551,441
Large MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. +534,134 1,166,809
Mega ENVESTNET ASSET MANAGEMENT INC +507,575 1,033,938

Top Sellers

vs Dec 31, 2025
Institution Sold Now Holds Open
Mega AMERICAN CENTURY COMPANIES INC −616,861 1,349,347
Mid NZS Capital, LLC −529,738 91,839
Mega NEUBERGER BERMAN GROUP LLC −417,768 1,068,844
Large Vontobel Holding Ltd. −417,612 478,684
Large Parallax Volatility Advisers, L.P. −366,688 1,512

Top New Positions

vs Dec 31, 2025
Institution Acquired Value (USD) Open
Mega VANGUARD CAPITAL MANAGEMENT LLC 65,608,259 $11,322,673,337
Mega VANGUARD FIDUCIARY TRUST CO 2,699,678 $465,910,429
Large CIBC Bancorp USA Inc. 1,358,233 $234,403,850
Mega Vanguard Global Advisers, LLC 1,024,070 $176,734,000
Large Aberdeen Group plc 852,623 $147,145,676

Top Sold-Out Positions

vs Dec 31, 2025
Institution Previously Held Last Value (USD) Open
Mega ARROWSTREET CAPITAL, LIMITED PARTNERSHIP 4,269,144 $749,533,612
Mega UBS Group AG 3,795,821 $666,432,291
Large CIBC Private Wealth Group LLC 1,166,450 $204,793,626
Mid Heard Capital LLC 1,162,440 $204,089,590
Large BNP PARIBAS ASSET MANAGEMENT Holding S.A. 1,123,616 $197,273,258
Filter: New 155 Increased 681 Reduced 601 Sold out 202 Unchanged 217
Showing 100 of 1,696
All Common Calls Puts
Export CSV
Holder Value (USD) % of 13F Shares Open
Mega VANGUARD CAPITAL MANAGEMENT LLC $6,082,733,797 13.76% 35,245,879
Mega VANGUARD CAPITAL MANAGEMENT LLC $5,239,939,540 11.85% 30,362,380
Mega STATE STREET CORP $3,699,184,821 8.37% 21,434,609
Mega GEODE CAPITAL MANAGEMENT, LLC $2,404,665,519 5.44% 13,933,628
Mega DEUTSCHE BANK AG\ Bank $1,340,834,933 3.03% 7,769,353
Large LAZARD ASSET MANAGEMENT LLC $1,264,311,242 2.86% 7,325,943
Mega PRINCIPAL FINANCIAL GROUP INC $1,020,740,113 2.31% 5,914,591
Mega NORTHERN TRUST CORP Bank $921,531,288 2.08% 5,339,734
Mega Legal & General Group Plc $832,857,445 1.88% 4,825,921
Mega UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC $748,909,871 1.69% 4,339,494
Mega Nuveen, LLC $671,195,029 1.52% 3,889,182
Mega Clearbridge Investments, LLC $636,039,448 1.44% 3,685,476
Mega VANGUARD FIDUCIARY TRUST CO Bank $465,910,429 1.05% 2,699,678
Mega MANUFACTURERS LIFE INSURANCE COMPANY, THE Insurance $399,681,301 0.90% 2,315,919
Mega NORDEA INVESTMENT MANAGEMENT AB $352,900,557 0.80% 2,044,852
Mega Fisher Asset Management, LLC $299,670,155 0.68% 1,736,413
Large Cantillon Capital Management LLC $278,280,589 0.63% 1,612,473
Large BARROW HANLEY MEWHINNEY & STRAUSS LLC $273,642,847 0.62% 1,585,600
Mega HSBC HOLDINGS PLC $271,464,364 0.61% 1,572,977
Mega RAYMOND JAMES FINANCIAL INC $267,747,686 0.61% 1,551,441
Mega National Pension Service Pension $264,686,463 0.60% 1,533,703
Mid Magellan Asset Management Ltd $259,438,823 0.59% 1,503,296
Large SG Americas Securities, LLC Broker-Dealer $238,633,269 0.54% 1,382,740
Mega Swiss National Bank Bank $237,107,662 0.54% 1,373,900
Large CIBC Bancorp USA Inc. Bank $234,403,850 0.53% 1,358,233
Mega AMERICAN CENTURY COMPANIES INC $232,870,305 0.53% 1,349,347
Mega TWO SIGMA INVESTMENTS, LP $211,736,503 0.48% 1,226,889
Mid LORING WOLCOTT & COOLIDGE FIDUCIARY ADVISORS LLP/MA $209,942,533 0.47% 1,216,494
Mega BNP PARIBAS ARBITRAGE, SA $209,217,180 0.47% 1,212,291
Large MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. Mutual Fund $201,367,896 0.46% 1,166,809
Mega D. E. Shaw & Co., Inc. $195,300,156 0.44% 1,131,650
Mid CBRE INVESTMENT MANAGEMENT LISTED REAL ASSETS LLC $191,602,975 0.43% 1,110,227
Mega NEUBERGER BERMAN GROUP LLC $184,461,097 0.42% 1,068,844
Mega Mitsubishi UFJ Asset Management Co., Ltd. $183,917,297 0.42% 1,065,693
Mega ENVESTNET ASSET MANAGEMENT INC $178,437,020 0.40% 1,033,938
Large CANADA LIFE ASSURANCE Co Insurance $177,887,351 0.40% 1,030,753
Large DAVENPORT & Co LLC $177,217,397 0.40% 1,026,871
Mega Vanguard Global Advisers, LLC $176,734,000 0.40% 1,024,070
Mega RHUMBLINE ADVISERS $171,742,987 0.39% 995,150
Large Swedbank AB Bank $164,564,867 0.37% 953,557
Mega California Public Employees Retirement System Pension $161,901,785 0.37% 938,126
Large Russell Investments Group, Ltd. $161,873,473 0.37% 937,962
Mid DUFF & PHELPS INVESTMENT MANAGEMENT CO $158,927,195 0.36% 920,890
Large COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS $158,474,001 0.36% 918,264
Large SEI INVESTMENTS CO $149,698,997 0.34% 867,418
Mid Sarasin & Partners LLP $148,965,188 0.34% 863,166
Large Aberdeen Group plc $147,145,676 0.33% 852,623
Mega LPL Financial LLC $146,553,555 0.33% 849,192
Large Man Group plc $142,574,896 0.32% 826,138
Large US BANCORP \DE\ Bank $140,966,275 0.32% 816,817
Mega VANGUARD ASSET MANAGEMENT, Ltd $140,298,911 0.32% 812,950
Large STOREBRAND ASSET MANAGEMENT AS $137,650,153 0.31% 797,602
Large VOLORIDGE INVESTMENT MANAGEMENT, LLC $136,582,918 0.31% 791,418
Large Allianz Asset Management GmbH $131,279,533 0.30% 760,688
Large MARSHALL WACE, LLP $129,651,414 0.29% 751,254
Large ACADIAN ASSET MANAGEMENT LLC $126,950,883 0.29% 735,606
Large CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM Pension $117,706,463 0.27% 682,040
Mid LASALLE INVESTMENT MANAGEMENT SECURITIES LLC Broker-Dealer $111,876,193 0.25% 648,257
Mega CITIGROUP INC $109,386,553 0.25% 633,831
Mid MILFORD FUNDS LTD $107,175,286 0.24% 621,018
Large Corient Private Wealth LLC $94,371,403 0.21% 546,827
Large DekaBank Deutsche Girozentrale Bank $92,396,052 0.21% 535,381
Large NEW YORK STATE COMMON RETIREMENT FUND Pension $91,393,363 0.21% 529,571
Large AVIVA PLC $89,128,078 0.20% 516,445
Large Mitsubishi UFJ Trust & Banking Corp $88,646,060 0.20% 513,652
Large Rathbones Group PLC $88,431,545 0.20% 512,409
Mid Douglass Winthrop Advisors, LLC $86,796,004 0.20% 502,932
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $86,721,450 0.20% 502,500
Mid Liontrust Investment Partners LLP $84,604,928 0.19% 490,236
Large Ensign Peak Advisors, Inc $83,747,724 0.19% 485,269
Large Vontobel Holding Ltd. $82,611,281 0.19% 478,684
Large BLAIR WILLIAM & CO/IL $81,134,690 0.18% 470,128
Large Vanguard Investments Australia, Ltd. $81,043,568 0.18% 469,600
Large GREAT LAKES ADVISORS, LLC $77,593,173 0.18% 449,607
Large Mariner, LLC $77,275,282 0.17% 447,765
Mid Maryland State Retirement & Pension System Pension $76,981,034 0.17% 446,060
Mid Douglas Lane & Associates, LLC $75,529,119 0.17% 437,647
Mid Border to Coast Pensions Partnership Ltd Pension $75,418,322 0.17% 437,005
Mid ANTIPODES PARTNERS Ltd $75,408,140 0.17% 436,946
Large NATIONAL BANK OF CANADA /FI/ Bank $72,504,135 0.16% 420,119
Large ADAGE CAPITAL PARTNERS GP, L.L.C. $72,380,914 0.16% 419,405
Large HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND Pension $72,380,569 0.16% 419,403
Small AVENIR CORP $71,681,448 0.16% 415,352
Large STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM Pension $70,904,493 0.16% 410,850
Large Lansforsakringar Fondforvaltning AB (publ) $70,335,151 0.16% 407,551
Large TCW GROUP INC $69,976,529 0.16% 405,473
Mega PNC FINANCIAL SERVICES GROUP, INC. $69,815,681 0.16% 404,541
Large Universal- Beteiligungs- und Servicegesellschaft mbH $69,676,586 0.16% 403,735
Large Focus Partners Wealth $69,074,972 0.16% 400,249
Large LOS ANGELES CAPITAL MANAGEMENT LLC $68,597,443 0.16% 397,482
Mid First Financial Bankshares Inc $68,095,753 0.15% 394,575
Large Pictet Asset Management Holding SA $67,696,403 0.15% 392,261
Large Federation des caisses Desjardins du Quebec $67,333,121 0.15% 390,156
Mid INTECH INVESTMENT MANAGEMENT LLC $65,050,751 0.15% 376,931
Large STIFEL FINANCIAL CORP $64,550,613 0.15% 374,033
Large FORT WASHINGTON INVESTMENT ADVISORS INC /OH/ $63,215,881 0.14% 366,299
Large NEW YORK STATE TEACHERS RETIREMENT SYSTEM Pension $62,740,250 0.14% 363,543
Large Retirement Systems of Alabama Pension $62,213,191 0.14% 360,489
Large JONES FINANCIAL COMPANIES LLLP $61,627,454 0.14% 357,095
Large Janney Montgomery Scott LLC $61,119,207 0.14% 354,150

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