FORM 4 [ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).         
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES
                                                                                  
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
                      

1. Name and Address of Reporting Person *

Puech Olivier
2. Issuer Name and Ticker or Trading Symbol

AMERICAN TOWER CORP /MA/ [ AMT ]
5. Relationship of Reporting Person(s) to Issuer (Check all applicable)

_____ Director                    _____ 10% Owner
__X__ Officer (give title below)    _____ Other (specify below)
EVP & President, LatAm & EMEA
(Last)          (First)          (Middle)

116 HUNTINGTON AVENUE
3. Date of Earliest Transaction (MM/DD/YYYY)

7/8/2020
(Street)

BOSTON, MA 02116
(City)        (State)        (Zip)
4. If Amendment, Date Original Filed (MM/DD/YYYY)

 
6. Individual or Joint/Group Filing (Check Applicable Line)

_X _ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)
2. Trans. Date 2A. Deemed Execution Date, if any 3. Trans. 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)
Code V Amount (A) or (D) Price
Common Stock 7/8/2020  M  311 A$94.71 18000 (1)D  
Common Stock 7/8/2020  S(2)  85 D$263.71 (3)17915 D  
Common Stock 7/8/2020  S(2)  9 D$264.24 (4)17906 D  
Common Stock 7/8/2020  S(2)  160 D$266.16 (5)17746 D  
Common Stock 7/8/2020  S(2)  12 D$266.83 17734 D  
Common Stock 7/8/2020  S(2)  149 D$269.11 (6)17585 D  
Common Stock 7/9/2020  M  3767 A$94.71 21352 D  
Common Stock 7/9/2020  S(2)  3767 D$265 17585 D  

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 3)
2. Conversion or Exercise Price of Derivative Security3. Trans. Date3A. Deemed Execution Date, if any4. Trans. Code
(Instr. 8)
5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)
6. Date Exercisable and Expiration Date7. 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 of Derivative Security: 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
Option to Purchase Common Stock $94.71 7/8/2020  M     311   (7)3/10/2026 Common Stock 311 $0 7845 D  
Option to Purchase Common Stock $94.71 7/9/2020  M     3767   (7)3/10/2026 Common Stock 3767 $0 4078 D  

Explanation of Responses:
(1) Includes 104 shares acquired under the issuer's employee stock purchase plan in May 2020.
(2) The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 8, 2020.
(3) Represents the weighted average price of shares sold in multiple same-day transactions at prices ranging from $263.20 to $264.16 per share.
(4) Represents the weighted average price of shares sold in multiple same-day transactions at prices ranging from $264.22 to $264.24 per share.
(5) Represents the weighted average price of shares sold in multiple same-day transactions at prices ranging from $265.23 to $266.19 per share.
(6) Represents the weighted average price of shares sold in multiple same-day transactions at prices ranging from $268.82 to $269.13 per share.
(7) This option was granted pursuant to the 2007 Equity Incentive Plan, as amended, and is exercisable in 25% cumulative annual increments beginning March 10, 2017.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director10% OwnerOfficerOther
Puech Olivier
116 HUNTINGTON AVENUE
BOSTON, MA 02116


EVP & President, LatAm & EMEA

Signatures
/s/ Mneesha O. Nahata, as attorney-in-fact7/10/2020
**Signature of Reporting PersonDate

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