    <SEC-DOCUMENT>0001020569-24-000117-index.html : 20240419
    <SEC-HEADER>0001020569-24-000117.hdr.sgml : 20240419
    <ACCEPTANCE-DATETIME>20240419162239
    ACCESSION NUMBER:		0001020569-24-000117
    CONFORMED SUBMISSION TYPE:	DEFA14A
    PUBLIC DOCUMENT COUNT:		4
    FILED AS OF DATE:		20240419
    DATE AS OF CHANGE:		20240419

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			IRON MOUNTAIN INC
    		CENTRAL INDEX KEY:			0001020569
    		STANDARD INDUSTRIAL CLASSIFICATION:	REAL ESTATE INVESTMENT TRUSTS [6798]
    		ORGANIZATION NAME:           	05 Real Estate & Construction
    		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:		24858066

    	BUSINESS ADDRESS:
    		STREET 1:		85 NEW HAMPSHIRE AVENUE, SUITE 150
    		STREET 2:		PEASE INTERNATIONAL TRADEPORT
    		CITY:			PORTSMOUTH
    		STATE:			NH
    		ZIP:			03801
    		BUSINESS PHONE:		617-535-4781

    	MAIL ADDRESS:
    		STREET 1:		1101 ENTERPRISE DRIVE
    		CITY:			ROYERSFORD
    		STATE:			PA
    		ZIP:			19468

    	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>a2024ironmountainna.htm
    <DESCRIPTION>DEFA14A
    <TEXT>
    Document 1 - file: a2024ironmountainna.htm

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

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>proxy1a.jpg
    <TEXT>
    Document 3 - file: proxy1a.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>4
    <FILENAME>proxy2a.jpg
    <TEXT>
    Document 4 - file: proxy2a.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>