Ownership Submission
FORM 3
 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
  Puech Olivier
 2. Date of Event Requiring Statement (Month/Day/Year)
10/01/2018		 3. Issuer Name and Ticker or Trading Symbol
AMERICAN TOWER CORP /MA/ [AMT]
(Last)
(First)
(Middle)
116 HUNTINGTON AVENUE		 4. 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
 5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

BOSTON, MA 02116		 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Beneficially Owned
1.Title of Security
(Instr. 4)		 2. Amount of Securities Beneficially Owned
(Instr. 4)		 3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)		 4. Nature of Indirect Beneficial Ownership
(Instr. 5)
Common Stock 18,016 (1)
D
 

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 4)		 2. Date Exercisable and Expiration Date
(Month/Day/Year)		 3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)		 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)		 6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Option to Purchase Common Stock   (2) 03/10/2024 Common Stock 5,054 $ 81.18 D  
Option to Purchase Common Stock   (3) 03/10/2025 Common Stock 16,567 $ 94.57 D  
Option to Purchase Common Stock   (4) 03/10/2026 Common Stock 24,468 $ 94.71 D  

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
Puech Olivier
116 HUNTINGTON AVENUE
BOSTON, MA 02116		       EVP & President, LatAm & EMEA  

Signatures

/s/ Mneesha O. Nahata, as attorney-in-fact 10/04/2018
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 5(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).
(1) Amount includes 18,016 shares of Common Stock underlying unvested restricted stock units previously granted under the 2007 Equity Incentive Plan, as amended (the "Plan").
(2) This option was granted pursuant to the Plan and is exercisable in 25% cumulative annual increments beginning March 10, 2015.
(3) This option was granted pursuant to the Plan and is exercisable in 25% cumulative annual increments beginning March 10, 2016.
(4) This option was granted pursuant to the Plan and is exercisable in 25% cumulative annual increments beginning March 10, 2017.

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