<SEC-DOCUMENT>0001206774-22-000945-index.html : 20220331
<SEC-HEADER>0001206774-22-000945.hdr.sgml : 20220331
<ACCEPTANCE-DATETIME>20220331170156
ACCESSION NUMBER:		0001206774-22-000945
CONFORMED SUBMISSION TYPE:	DEFA14A
PUBLIC DOCUMENT COUNT:		9
FILED AS OF DATE:		20220331
DATE AS OF CHANGE:		20220331

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			IRON MOUNTAIN INC
		CENTRAL INDEX KEY:			0001020569
		STANDARD INDUSTRIAL CLASSIFICATION:	REAL ESTATE INVESTMENT TRUSTS [6798]
		IRS NUMBER:				232588479
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		DEFA14A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-13045
		FILM NUMBER:		22793886

	BUSINESS ADDRESS:	
		STREET 1:		ONE FEDERAL STREET
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02110
		BUSINESS PHONE:		617-535-4781

	MAIL ADDRESS:	
		STREET 1:		ONE FEDERAL STREET
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02110

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	IRON MOUNTAIN INC/PA
		DATE OF NAME CHANGE:	20000201

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	PIERCE LEAHY CORP
		DATE OF NAME CHANGE:	19960807
</SEC-HEADER>
<DOCUMENT>
<TYPE>DEFA14A
<SEQUENCE>1
<FILENAME>irm3982191-defa14a.htm
<DESCRIPTION>DEFINITIVE ADDITIONAL PROXY SOLICITING MATERIALS
<TEXT>
Document 1 - file: irm3982191-defa14a.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>irm3982191-defa14ax1x1.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 2 - file: irm3982191-defa14ax1x1.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>irm3982191-defa14ax1x2.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 3 - file: irm3982191-defa14ax1x2.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>irm3982191-defa14ax1x3.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 4 - file: irm3982191-defa14ax1x3.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>5
<FILENAME>irm3982191-defa14ax1x4.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 5 - file: irm3982191-defa14ax1x4.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>6
<FILENAME>irm3982191-defa14ax1x5.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 6 - file: irm3982191-defa14ax1x5.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>7
<FILENAME>irm3982191-defa14ax1x6.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 7 - file: irm3982191-defa14ax1x6.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>8
<FILENAME>irm3982191-defa14ax2x1.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 8 - file: irm3982191-defa14ax2x1.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>9
<FILENAME>logo.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 9 - file: logo.jpg

</DOCUMENT>
</SEC-DOCUMENT>