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 2026-10-10T12:08:28.848Z

Separate the three disclosure sources

Step 1 of 3

Recent Form 4 activity

American Tower Corporation: source evidence dated 2026-10-10T12:08:28.848Z.

Available
2026-10-05
Trade date
2026-10-01
Reporting owners
Blanchett Paul
Code
A
Shares
16,299
Reported value
Not reported
What you should see

The displayed owner or issuer and source fields identify the receipt to verify; keep reporting and availability dates separate.

Step 2 of 3

Is this an insider transaction, 13F holding, or Congressional event?

Each source has different dates and units. Raw ticker-matched receipts, including amendments, are not deduplicated current ownership totals.

SEC 0001053507-26-000149
What you should see

Follow the source receipt or manager/member profile. Avoid combining transaction value and 13F position value into an ownership percentage.

Step 3 of 3

Read AMT fundamentals

Follow the source receipt or manager/member profile. Avoid combining transaction value and 13F position value into an ownership percentage.

Read AMT fundamentals
What you should see

Keep reporting dates and units beside the answer, and inspect its original citations.

Recent Form 4 activity

See the complete recent form 4 activity

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2026-10-052026-10-01Blanchett PaulA16,299Not reported
2026-08-262026-08-21Kalathur RajeshP2,829Not reported
2026-08-012026-07-29Meyer Robert JosephS5,000Not reported
2026-07-312026-07-29Dowling Ruth TS1,106Not reported
2026-07-312026-07-28Dowling Ruth TS685Not reported

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

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

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Ro Khanna2026-10-082026-09-25sale$1,001 - $15,000
Ro Khanna2026-10-082026-09-11purchase$1,001 - $15,000

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.

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