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American Tower (AMT) executive sells 1,791 shares under 10b5-1 plan

Filing Impact
(Moderate)
Filing Sentiment
(Negative)
Form Type
4

Rhea-AI Filing Summary

American Tower Corporation executive Ruth T. Dowling, EVP, Chief Administrative Officer, General Counsel and Secretary, reported selling a total of 1,791 shares of common stock in two transactions on July 28–29, 2026. She sold 685 shares at $169.5400 per share and 1,106 shares at $174.9600 per share. These sales were effected pursuant to a Rule 10b5-1 trading plan adopted on October 29, 2025. Her reported holdings include 41 shares acquired under the company’s employee stock purchase plan in May 2026.

Positive

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Negative

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Insider Dowling Ruth T
Role EVP, Chief Admin Ofr, GC & Sec
Sold 1,791 shs ($310K)
Type Security Shares Price Value
Sale Common Stock F1 1,106 $174.96 $194K
Sale Common Stock F1, F2 685 $169.54 $116K
Holdings After Transaction: Common Stock — 27,711 shares (Direct)
Footnotes (2)
  1. F1. The sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on October 29, 2025.
  2. F2. Includes 41 shares acquired under the issuer's employee stock purchase plan in May 2026.
Shares sold on 2026-07-28 685 shares Common stock sale by Ruth T. Dowling at $169.5400 per share
Shares sold on 2026-07-29 1,106 shares Common stock sale by Ruth T. Dowling at $174.9600 per share
Total shares sold 1,791 shares Aggregate common shares sold across both July 2026 transactions
Rule 10b5-1 plan adoption date October 29, 2025 Adoption date of trading plan governing the reported sales
ESPP shares included in holdings 41 shares Shares acquired under the employee stock purchase plan in May 2026
Rule 10b5-1 trading plan regulatory
"The sale was effected pursuant to a Rule 10b5-1 trading plan"
A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.
employee stock purchase plan financial
"Includes 41 shares acquired under the issuer's employee stock purchase plan"
An employee stock purchase plan is a company program that lets workers buy shares through small payroll deductions, often at a discount to the market price and after a set offering period. Think of it like a workplace savings plan that turns into ownership: it encourages employees to share in the company’s success and can create predictable buying or selling of stock that investors watch because it affects supply, demand and employee incentives.
Sale in open market or private transaction market
"Transaction code description: Sale in open market or private transaction"

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FAQ

What insider transaction did AMT executive Ruth T. Dowling report?
Ruth T. Dowling reported selling 1,791 shares of American Tower (AMT) common stock in two transactions. The trades occurred on July 28 and 29, 2026, and were executed under a Rule 10b5-1 trading plan adopted in October 2025.

How many AMT shares did Ruth Dowling sell and at what prices?
Ruth T. Dowling sold 685 AMT shares at $169.5400 per share on July 28, 2026, and 1,106 shares at $174.9600 per share on July 29, 2026, for total reported sales of 1,791 shares of common stock.

Were Ruth Dowling’s AMT stock sales made under a Rule 10b5-1 plan?
Yes. Both reported sales by Ruth T. Dowling of American Tower (AMT) stock were made pursuant to a Rule 10b5-1 trading plan that she adopted on October 29, 2025, indicating the transactions were pre-arranged under that plan.

Does Ruth Dowling’s AMT position include employee stock purchase plan shares?
Her reported holdings include 41 shares of American Tower (AMT) common stock acquired through the issuer’s employee stock purchase plan in May 2026, as disclosed in the filing’s footnotes alongside the reported stock sales.
SEC Form 4
FORM 4UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number:3235-0287
Estimated average burden
hours per response:0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
X
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
Dowling Ruth T
(Last)(First)(Middle)
222 BERKELEY STREET
(Street)
BOSTON MASSACHUSETTS 02116
(City)(State)(Zip)
UNITED STATES
(Country)		2. Issuer Name and Ticker or Trading Symbol
AMERICAN TOWER CORP /MA/ [ AMT ] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director10% Owner
XOfficer (give title below)Other (specify below)
EVP, Chief Admin Ofr, GC & Sec
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
07/28/2026		6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year)2A. Deemed Execution Date, if any (Month/Day/Year)3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeVAmount(A) or (D)Price
Common Stock07/28/2026S(1)685D$169.5428,817(2)D
Common Stock07/29/2026S(1)1,106D$174.9627,711D
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year)3A. Deemed Execution Date, if any (Month/Day/Year)4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year)7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Explanation of Responses:
1. The sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on October 29, 2025.
2. Includes 41 shares acquired under the issuer's employee stock purchase plan in May 2026.
Remarks:
/s/ Marina A. Breed, as attorney-in-fact07/30/2026
** Signature of Reporting PersonDate
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

Source: View Original Filing on SEC EDGAR