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Form 8-K

sec.gov

8-K — AMERICAN TOWER CORP /MA/

Accession: 0001053507-26-000127

Filed: 2026-06-04

Period: 2026-06-02

CIK: 0001053507

SIC: 6798 (REAL ESTATE INVESTMENT TRUSTS)

Item: Other Events

Documents

8-K — amt-20260602.htm (Primary)

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8-K

8-K (Primary)

Filename: amt-20260602.htm · Sequence: 1

amt-20260602

AMERICAN TOWER CORP /MA/0001053507false00010535072026-06-022026-06-020001053507exch:XNYSus-gaap:CommonStockMember2026-06-022026-06-020001053507exch:XNYSamt:A0450SeniorNotesDue2027Member2026-06-022026-06-020001053507exch:XNYSamt:A0400SeniorNotesDue2027Member2026-06-022026-06-020001053507exch:XNYSamt:A4125SeniorNotesDue2027Member2026-06-022026-06-020001053507exch:XNYSamt:A0500SeniorNotesDue2028Member2026-06-022026-06-020001053507exch:XNYSamt:A0875SeniorNotesDue2029Member2026-06-022026-06-020001053507exch:XNYSamt:A0950SeniorNotesDue2030Member2026-06-022026-06-020001053507exch:XNYSamt:A3.900SeniorNotesDue2030Member2026-06-022026-06-020001053507exch:XNYSamt:A4625SeniorNotesDue2031Member2026-06-022026-06-020001053507exch:XNYSamt:A1.000SeniorNotesDue2032Member2026-06-022026-06-020001053507exch:XNYSamt:A3.625SeniorNotesDue2032Member2026-06-022026-06-020001053507exch:XNYSamt:A1250SeniorNotesDue2033Member2026-06-022026-06-020001053507exch:XNYSamt:A4.000SeniorNotesDue2033Member2026-06-022026-06-020001053507exch:XNYSamt:A4.100SeniorNotesDue2034Member2026-06-022026-06-02

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON D.C. 20549

FORM 8-K

CURRENT REPORT PURSUANT

TO SECTION 13 OR 15(d) OF THE

SECURITIES EXCHANGE ACT OF 1934

Date of Report (Date of Earliest Event Reported): June 2, 2026

AMERICAN TOWER CORPORATION

(Exact Name of Registrant as Specified in Charter)

Delaware

001-14195

65-0723837

(State or Other Jurisdiction of Incorporation)

(Commission File Number)

(I.R.S. Employer Identification No.)

222 Berkeley Street

Boston, Massachusetts 02116

(Address of Principal Executive Offices) (Zip Code)

(617) 375-7500

(Registrant's telephone number, including area code)

Not Applicable

(Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class Trading Symbol(s) Name of each exchange on which registered

Common Stock, $0.01 par value  AMT New York Stock Exchange

0.450% Senior Notes due 2027 AMT 27C New York Stock Exchange

0.400% Senior Notes due 2027 AMT 27D New York Stock Exchange

4.125% Senior Notes due 2027 AMT 27F New York Stock Exchange

0.500% Senior Notes due 2028 AMT 28A New York Stock Exchange

0.875% Senior Notes due 2029 AMT 29B New York Stock Exchange

0.950% Senior Notes due 2030 AMT 30C New York Stock Exchange

3.900% Senior Notes due 2030 AMT 30D New York Stock Exchange

4.625% Senior Notes due 2031 AMT 31B New York Stock Exchange

1.000% Senior Notes due 2032 AMT 32 New York Stock Exchange

3.625% Senior Notes due 2032 AMT 32B New York Stock Exchange

1.250% Senior Notes due 2033 AMT 33 New York Stock Exchange

4.000% Senior Notes due 2033 AMT 33D New York Stock Exchange

4.100% Senior Notes due 2034 AMT 34A New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.☐

Item 8.01    Other Events.

American Tower Corporation (the “Company”) is providing an update regarding its relationship with DISH Wireless L.L.C., a subsidiary of DISH Network Corporation (“DISH”). The Company delivered a notice of termination, effective June 2, 2026, to DISH of the Company’s Strategic Collocation Agreement entered into in March 2021 (the “SCA”) and related agreements with DISH. Beginning on January 1, 2026, 100% of DISH revenue has been reflected in churn and this termination is not expected to impact the Company’s financial results for the year ending December 31, 2026. The Company continues to pursue litigation against DISH with respect to its obligations under the SCA.

Cautionary Language Regarding Forward-Looking Statements

This current report on Form 8-K contains “forward-looking statements” concerning the Company’s goals, beliefs, expectations, strategies, objectives, plans, future operating results and underlying assumptions and other statements that are not necessarily based on historical facts. Actual results may differ materially from those indicated in the Company’s forward-looking statements as a result of various factors, including those factors set forth under the caption “Risk Factors” in Item 1A of its most recent annual report on Form 10-K, and other risks described in documents the Company subsequently files from time to time with the Securities and Exchange Commission. The Company undertakes no obligation to update the information contained in this current report on Form 8-K to reflect subsequently occurring events or circumstances.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

AMERICAN TOWER CORPORATION

(Registrant)

Date: June 4, 2026 By: /s/ Rodney M. Smith

Rodney M. Smith

Executive Vice President, Chief Financial Officer and Treasurer

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Jun. 02, 2026

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Document Period End Date

Jun. 02, 2026

Entity Incorporation, State or Country Code

DE

Entity File Number

001-14195

Entity Tax Identification Number

65-0723837

Entity Address, Address Line One

222 Berkeley Street

Entity Address, City or Town

Boston

Entity Address, State or Province

MA

Entity Address, Postal Zip Code

02116

City Area Code

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Local Phone Number

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NEW YORK STOCK EXCHANGE, INC. | Common Stock

Entity Information [Line Items]

Title of 12(b) Security

Common Stock, $0.01 par value

Trading Symbol

AMT

Security Exchange Name

NYSE

NEW YORK STOCK EXCHANGE, INC. | Zero Point Four Five Zero Percent Senior Notes, Due 2027

Entity Information [Line Items]

Title of 12(b) Security

0.450% Senior Notes due 2027

Trading Symbol

AMT 27C

Security Exchange Name

NYSE

NEW YORK STOCK EXCHANGE, INC. | Zero Point Five Zero Percent Senior Notes Due 2028 [Member]

Entity Information [Line Items]

Title of 12(b) Security

0.500% Senior Notes due 2028

Trading Symbol

AMT 28A

Security Exchange Name

NYSE

NEW YORK STOCK EXCHANGE, INC. | One Point Zero Percent Senior Notes Due 2032

Entity Information [Line Items]

Title of 12(b) Security

1.000% Senior Notes due 2032

Trading Symbol

AMT 32

Security Exchange Name

NYSE

NEW YORK STOCK EXCHANGE, INC. | Zero Point Eight Seven Five Percent Senior Notes, Due

Entity Information [Line Items]

Title of 12(b) Security

0.875% Senior Notes due 2029

Trading Symbol

AMT 29B

Security Exchange Name

NYSE

NEW YORK STOCK EXCHANGE, INC. | One Point Two Five Zero Percent Senior Notes, Due 2033

Entity Information [Line Items]

Title of 12(b) Security

1.250% Senior Notes due 2033

Trading Symbol

AMT 33

Security Exchange Name

NYSE

NEW YORK STOCK EXCHANGE, INC. | 0.400% Senior Notes Due 2027

Entity Information [Line Items]

Title of 12(b) Security

0.400% Senior Notes due 2027

Trading Symbol

AMT 27D

Security Exchange Name

NYSE

NEW YORK STOCK EXCHANGE, INC. | 0.950% Senior Notes Due 2030

Entity Information [Line Items]

Title of 12(b) Security

0.950% Senior Notes due 2030

Trading Symbol

AMT 30C

Security Exchange Name

NYSE

NEW YORK STOCK EXCHANGE, INC. | 4.125% Senior Notes due 2027

Entity Information [Line Items]

Title of 12(b) Security

4.125% Senior Notes due 2027

Trading Symbol

AMT 27F

Security Exchange Name

NYSE

NEW YORK STOCK EXCHANGE, INC. | 4.625% Senior Notes Due 2031

Entity Information [Line Items]

Title of 12(b) Security

4.625% Senior Notes due 2031

Trading Symbol

AMT 31B

Security Exchange Name

NYSE

NEW YORK STOCK EXCHANGE, INC. | 3.900% Senior Notes Due 2030

Entity Information [Line Items]

Title of 12(b) Security

3.900% Senior Notes due 2030

Trading Symbol

AMT 30D

Security Exchange Name

NYSE

NEW YORK STOCK EXCHANGE, INC. | 4.100% Senior Notes due 2034

Entity Information [Line Items]

Title of 12(b) Security

4.100% Senior Notes due 2034

Trading Symbol

AMT 34A

Security Exchange Name

NYSE

NEW YORK STOCK EXCHANGE, INC. | 3.625% Senior Notes Due 2032

Entity Information [Line Items]

Title of 12(b) Security

3.625% Senior Notes due 2032

Trading Symbol

AMT 32B

Security Exchange Name

NYSE

NEW YORK STOCK EXCHANGE, INC. | 4.000 Senior Notes due 2033

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Title of 12(b) Security

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