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Public ownership evidence

American Tower Corporation (AMT) Ownership Disclosures

Read AMT insider transactions, institutional 13F filings and Congressional disclosures with report dates, public availability and original receipts.

As of 2026-11-07T14:03:26.246Z

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2026-11-032026-10-30Font JuanS592Not reported

First displayed source row from Recent Form 4 activity. The full bounded history and coverage notes remain below.

The displayed observation date is 2026-10-30 and its public availability date is 2026-11-03. Subtracting those calendar dates gives 4 days of disclosure lag. Historical public research can use the record from the availability date, rather than backdating knowledge to the observation date. The calendar-day difference does not assert an intraday publication time.

This row is code S: a sale. A purchase-following rule excludes this sale even if the reported dollar amount is large.

Open the linked original receipts to verify the row, then inspect a second record before drawing a pattern. This public filing observation supplies source evidence, not a completed copy-trading return.

SEC 0001053507-26-000161 ↗SEC 0001053507-26-000159 ↗SEC 0001053507-26-000159 ↗

Recent Form 4 activity

Inspect all 20 displayed rows: Recent Form 4 activity

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2026-11-032026-10-30Font JuanS592Not reported
2026-10-302026-10-29Dowling Ruth TS952Not reported
2026-10-302026-10-28Dowling Ruth TS626Not reported
2026-10-222025-04-28Clarke Teresa HillaryP25.49Not reported
2026-10-222025-02-03Clarke Teresa HillaryP17.58Not reported
2026-10-222024-10-25Clarke Teresa HillaryP14.37Not reported
2026-10-222024-07-12Clarke Teresa HillaryP15.87Not reported
2026-10-222024-04-26Clarke Teresa HillaryP18.59Not reported
2026-10-222024-02-01Clarke Teresa HillaryP7.68Not reported
2026-10-222023-10-27Clarke Teresa HillaryP8.45Not reported
2026-10-222023-07-10Clarke Teresa HillaryP7.19Not reported
2026-10-222026-10-20Clarke Teresa HillaryP42.93Not reported
2026-10-222026-07-13Clarke Teresa HillaryP46.45Not reported
2026-10-222026-04-28Clarke Teresa HillaryP43.5Not reported
2026-10-222026-02-02Clarke Teresa HillaryP30.71Not reported
2026-10-222025-10-20Clarke Teresa HillaryP28.66Not reported
2026-10-222025-07-11Clarke Teresa HillaryP24.1Not reported
2026-10-222023-04-28Clarke Teresa HillaryP6.67Not reported
2026-10-052026-10-01Blanchett PaulA16,299Not reported
2026-08-262026-08-21Kalathur RajeshP2,829Not reported

90-day public availability window, up to 50 records.

Recent institutional filing receipts

Inspect all 50 displayed rows: Recent institutional filing receipts

These are raw ticker-matched positions in recent 13F receipts, including amendments. They are not deduplicated current ownership totals. Open the manager profile to inspect its effective filing book.

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Arbor Wealth Management LLC\AZ2025-12-312026-09-01211$37,040None
Cornerstone Financial Management LLC2026-06-302026-08-2988$14,394None
Cornerstone Financial Management LLC2026-03-312026-08-2955$9,492None
Cornerstone Financial Management LLC2025-12-312026-08-2942$7,374None
B. Riley Wealth Advisors, Inc.2025-03-312026-08-2925,463$5,540,749None
Advisors Asset Management, Inc.2021-12-312026-08-28194,472$56,883,060None
Advisors Asset Management, Inc.2022-12-312026-08-28148,044$31,364,602None
Advisors Asset Management, Inc.2020-06-302026-08-28177,345$45,850,776None
Advisors Asset Management, Inc.2022-06-302026-08-28181,001$46,262,000None
Advisors Asset Management, Inc.2021-09-302026-08-28189,073$50,182,000None
Corient Private Wealth LP2026-06-302026-08-28500,908$81,934,829None
Corient Private Wealth LP2026-06-302026-08-284,793$783,948None
Formuepleje A/S2024-03-312026-08-2833,355$6,590,614None
Formuepleje A/S2023-12-312026-08-2837,743$8,147,959None
Formuepleje A/S2023-09-302026-08-2839,648$6,520,114None
Formuepleje A/S2023-06-302026-08-2838,001$7,369,914None
Formuepleje A/S2023-03-312026-08-2840,676$8,311,734None
Formuepleje A/S2022-12-312026-08-2831,586$6,691,810None
Formuepleje A/S2022-09-302026-08-2812,246$2,629,216None
Reflection Asset Management2026-03-312026-08-275,283$911,775None
Principia Wealth Advisory, LLC2026-06-302026-08-2739$6,379None
Principia Wealth Advisory, LLC2026-03-312026-08-2731$5,350None
Advisors Asset Management, Inc.2024-03-312026-08-2799,849$19,729,164None
Advisors Asset Management, Inc.2025-03-312026-08-27120,781$26,281,946None
Advisors Asset Management, Inc.2022-09-302026-08-27171,563$36,835,000None
Advisors Asset Management, Inc.2020-12-312026-08-27184,553$41,425,000None
Advisors Asset Management, Inc.2022-03-312026-08-27195,589$49,135,869None
Advisors Asset Management, Inc.2023-06-302026-08-27122,500$23,757,650None
Advisors Asset Management, Inc.2023-09-302026-08-27113,916$18,733,486None
Advisors Asset Management, Inc.2023-03-312026-08-27134,093$27,400,564None
Advisors Asset Management, Inc.2021-03-312026-08-27187,117$44,732,190None
Advisors Asset Management, Inc.2021-06-302026-08-27181,927$49,146,000None
Advisors Asset Management, Inc.2020-09-302026-08-27179,496$43,389,568None
Advisors Asset Management, Inc.2025-09-302026-08-27115,134$22,142,571None
Advisors Asset Management, Inc.2023-12-312026-08-27105,442$22,762,819None
Dakota Wealth Management2025-09-302026-08-274,490$863,536None
Dakota Wealth Management2025-12-312026-08-273,583$629,029None
Dakota Wealth Management2026-03-312026-08-272,869$495,177None
Advus Financial Partners, LLC2025-06-302026-08-26959$211,992None
Groupe la Francaise2026-06-302026-08-2633,505$5,481,053None
Advisors Asset Management, Inc.2019-12-312026-08-26172,214$39,578,221None
Advisors Asset Management, Inc.2025-06-302026-08-25120,258$26,579,423None
Vancity Investment Management Ltd2026-06-302026-08-2536,056$5,898,000None
CYBER HORNET ETFs LLC2026-06-302026-08-251,271$207,897None
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM2026-06-302026-08-25715,369$117,012,907None
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM2026-06-302026-08-25117,012,907$715,369,000None
Kings Path Partners LLC2026-03-312026-08-22259$44,698None
Advisors Asset Management, Inc.2024-09-302026-08-22106,750$24,825,780None
Advisors Asset Management, Inc.2024-06-302026-08-22103,009$20,022,889None
Advisors Asset Management, Inc.2024-12-312026-08-22107,745$19,761,510None

90-day public filing window, up to 50 source positions.

Arbor Wealth Management LLC\AZ ↗Cornerstone Financial Management LLC ↗Cornerstone Financial Management LLC ↗Cornerstone Financial Management LLC ↗B. Riley Wealth Advisors, Inc. ↗Advisors Asset Management, Inc. ↗Advisors Asset Management, Inc. ↗Advisors Asset Management, Inc. ↗Advisors Asset Management, Inc. ↗Advisors Asset Management, Inc. ↗

Recent Congressional disclosures

No matching Congressional transactions were returned in this source preview.

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Bounded public source preview, up to 25 disclosed events.

How to read the disclosure dates

The tables report different things: insider transactions, institutional positions and Congressional transaction ranges. Read each table with its source dates and units. They cannot be added into a combined ownership percentage.

  1. Company insiders

    SEC Form 4 purchases, sales and awards report transactions and their public filing availability.

  2. Institutional managers

    13F reports disclose delayed quarter-end positions. They are not a record of trades between quarters.

  3. Congressional filers

    Periodic transaction reports disclose transaction dates and amount brackets. Public filing dates determine what researchers could know.

Institutional source directory ↗Congressional source directory ↗

Read the transaction codes

Awards use transaction code A, purchases P and sales S. An acquisition from an award is not the same as an open-market purchase. Joint filers may share a transaction. Use original receipts and availability dates to interpret the events.