Iron Mountain (IRM) IRANNOTICE Disclosure regarding Iran Threat Reduction and Syria Human Rights Act

August 5, 2021

U.S. Securities and Exchange Commission

100 F Street, N.E.

Washington, DC 20549

Re:    Notice of disclosure filed in the Quarterly Report for the quarter ended June 30, 2021, under Section 219 of the Iran Threat Reduction and Syria Human Rights Act of 2012 and Section 13(r) of the Securities Exchange Act of 1934

Ladies and Gentlemen:

Pursuant to Section 219 of the Iran Threat Reduction and Syria Human Rights Act of 2012 and Section 13(r) of the Securities Exchange Act of 1934, as amended, notice is hereby provided that Iron Mountain Incorporated has made disclosure pursuant to such provisions in its Quarterly Report on Form 10-Q for the quarter ended June 30, 2021.

Sincerely,

Iron Mountain Incorporated

By:/s/ DEBORAH MARSON

    Deborah Marson

Executive Vice President, General Counsel and Secretary

One Federal Street, Boston, MA 02110, USA IRONMOUNTAIN.COM