<SEC-DOCUMENT>0001193125-21-164458-index.html : 20210518
<SEC-HEADER>0001193125-21-164458.hdr.sgml : 20210518
<ACCEPTANCE-DATETIME>20210518060526
ACCESSION NUMBER:		0001193125-21-164458
CONFORMED SUBMISSION TYPE:	424B5
PUBLIC DOCUMENT COUNT:		4
FILED AS OF DATE:		20210518
DATE AS OF CHANGE:		20210518

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			AMERICAN TOWER CORP /MA/
		CENTRAL INDEX KEY:			0001053507
		STANDARD INDUSTRIAL CLASSIFICATION:	REAL ESTATE INVESTMENT TRUSTS [6798]
		IRS NUMBER:				650723837
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		424B5
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-231931
		FILM NUMBER:		21933733

	BUSINESS ADDRESS:	
		STREET 1:		116 HUNTINGTON AVE
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02116
		BUSINESS PHONE:		6173757500

	MAIL ADDRESS:	
		STREET 1:		116 HUNTINGTON AVE
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02116

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	AMERICAN TOWER SYSTEMS CORP
		DATE OF NAME CHANGE:	19980128
</SEC-HEADER>
<DOCUMENT>
<TYPE>424B5
<SEQUENCE>1
<FILENAME>d921905d424b5.htm
<DESCRIPTION>424B5
<TEXT>
Document 1 - file: d921905d424b5.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>g921905g02l50.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 2 - file: g921905g02l50.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>g921905g19c31.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 3 - file: g921905g19c31.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>g921905g95m80.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 4 - file: g921905g95m80.jpg

</DOCUMENT>
</SEC-DOCUMENT>