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AMT 424B5: Secondary offering

American Tower Corporation

Filed with the SEC on · accession 0001193125-26-452770

AMT filed a 424B5 (prospectus (offering)) with the SEC on Nov 9, 2026. The final terms of an offering of shares or bonds. The stock moved +0.1% by the first close after the filing.

Summary of the filing

American Tower Corporation filed a preliminary prospectus supplement for a public offering of three series of senior notes due 2031, 2033, and 2036, which will be consolidated and fungible with existing notes of the same series issued in September 2026.

For details, click here →How to read a 424B5 →

Key details

Outstanding principal amount of initial 5.300% Senior Notes due 2031$500.0M
Outstanding principal amount of initial 5.560% Senior Notes due 2033$500.0M
Outstanding principal amount of initial 5.750% Senior Notes due 2036$600.0M
IssuerAmerican Tower Corporation
Joint book-running managerTD Securities
Joint book-running managerING
Joint book-running managerMizuho
Joint book-running managerRBC Capital Markets
Joint book-running managerSMBC Nikko

How AMT stock reacted

Close before

$188.79

Nov 6, 2026

First close after

+0.11%

$189.00

5 trading days

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Since filing

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Frequently asked questions

What did AMT file with the SEC on Nov 9, 2026?

AMT filed a 424B5 (Secondary offering). American Tower Corporation filed a preliminary prospectus supplement for a public offering of three series of senior notes due 2031, 2033, and 2036, which will be consolidated and fungible with existing notes of the same series issued in September 2026.

What does a secondary offering mean for AMT stock?

New shares dilute existing holders and are often sold at a discount to the market price.

How do I read a 424B5?

The final terms of an offering of shares or bonds. Look at price, number of shares and the discount to the market price. Large offerings dilute existing shareholders.

Why are SEC filings important?

Public companies must tell the SEC about anything that can change their value — results, leadership changes, big deals, new shares, bankruptcy. Filings are the official source, often before the news. A 424B5 (prospectus (offering)): The final terms of an offering of shares or bonds.

How did AMT stock react to this filing?

AMT closed at $188.79 before the filing and $189.00 on Nov 9, 2026 (+0.11%).

Other AMT SEC filings

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