IRON MOUNTAIN INC — Director's Dealing 2021

May 14, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: IRON MOUNTAIN INC (IRM)
CIK: 0001020569
Period of Report: 2021-05-12

Reporting Person: Allerton Jennifer (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-05-12	Common Stock, par value $.01 per share	A	3933	$0.01	Acquired	16745	Direct
2021-05-12	Common Stock, par value $.01 per share	F	433	$40.68	Disposed	16312	Direct

Footnotes

F1: Consists of shares issuable upon the settlement of restricted stock units ("RSUs") granted on May 12, 2021. The RSUs vest on the grant date.