IRON MOUNTAIN INC — Remuneration Information 2021

Apr 2, 2021

DEFA14A 1 irm3816531-defa14a.htm DEFINITIVE ADDITIONAL PROXY SOLICITING MATERIALS

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549

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Iron Mountain Inc.

(Name of Registrant as Specified In Its Charter) (Name of Person(s) Filing Proxy Statement, if Other Than the Registrant)

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IRON MOUNTAIN INCORPORATED
2021 Annual Meeting
Vote by May 11, 2021
11:59 PM ET
IRON MOUNTAIN INCORPORATED INVESTOR RELATIONS ONE FEDERAL STREET BOSTON, MA 02110
D45862-Z78959-P48717

You invested in IRON MOUNTAIN INCORPORATED and it’s time to vote!

You have the right to vote on proposals being presented at the Annual Meeting. This is an important notice regarding the availability of proxy material for the stockholder meeting to be held on May 12, 2021.

Get informed before you vote

View the Notice and Proxy Statement and Annual Report online OR you can receive a free paper or email copy of the material(s) by requesting prior to April 28, 2021. If you would like to request a copy of the material(s) for this and/or future stockholder meetings, you may (1) visit www.ProxyVote.com, (2) call 1-800-579-1639 or (3) send an email to sendmaterial@proxyvote.com. If sending an email, please include your control number (indicated below) in the subject line. Unless requested, you will not otherwise receive a paper or email copy.

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Smartphone users Point your camera here and vote without entering a control number Vote Virtually at the Meeting* May 12, 2021 9:00 A.M., ET Virtually at: www.virtualshareholdermeeting.com/IRM2021

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Vote at www.ProxyVote.com

THIS IS NOT A VOTABLE BALLOT This is an overview of the proposals being presented at the upcoming stockholder meeting. Please follow the instructions on the reverse side to vote these important matters.

Voting Items			Board — Recommends
1.	For the election of twelve (12) directors to the Iron Mountain Incorporated Board of Directors for a one-year term or until
their successors are elected and qualified.
	Nominees:
	1a.	Jennifer Allerton	For
	1b.	Pamela M. Arway	For
	1c.	Clarke H. Bailey	For
	1d.	Kent P. Dauten	For
	1e.	Monte Ford	For
	1f.	Per-Kristian Halvorsen	For
	1g.	Robin L. Matlock	For
	1h.	William L. Meaney	For
	1i.	Wendy J. Murdock	For
	1j.	Walter C. Rakowich	For
	1k.	Doyle R. Simons	For
	1l.	Alfred J. Verrecchia	For
2.	The approval of an amendment to the Iron Mountain Incorporated 2014 Stock and Cash Incentive Plan (the “2014 Plan”)
to increase the number of shares of common stock of the Company (“Common Stock”) authorized for issuance thereunder
by 8,000,000, from 12,750,000 to 20,750,000, to extend the termination date of the 2014 Plan from May 24, 2027 to May 12,
2031, to provide that, other than in certain circumstances, no equity-based award will vest before the first anniversary of
the date of grant and to provide that dividends and dividend equivalents are not paid with respect to stock options or stock
appreciation rights.		For
3.	The approval of an amendment to the Iron Mountain Incorporated 2013 Employee Stock Purchase Plan (the “2013 ESPP”)
to increase the number of shares of Common Stock authorized for issuance thereunder by 1,000,000.		For
4.	The approval of a non-binding, advisory resolution approving the compensation of our named executive officers as described
in the Iron Mountain Incorporated Proxy Statement.		For
5.	The ratification of the selection by the Audit Committee of Deloitte & Touche LLP as Iron Mountain Incorporated’s
independent registered public accounting firm for the year ending December 31, 2021.		For
NOTE: In their discretion, the proxies are authorized to vote upon such other business as may properly come before the Annual Meeting
of Stockholders or any postponement or adjournment thereof.
Prefer to receive an email instead? While voting on www.ProxyVote.com, be sure to click “Sign up for E-delivery”.

D45863-Z78959-P48717

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