IRON MOUNTAIN INC — Director's Dealing 2022

Apr 11, 2022

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: IRON MOUNTAIN INC (IRM)
CIK: 0001020569
Period of Report: 2022-01-04

Reporting Person: Matlock Robin (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2022-01-04	Common Stock, par value $.01 per share	M	841	—	Acquired	16451	Direct
2022-01-04	Common Stock, par value $.01 per share	D	841	$50.8783	Disposed	15610	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2022-01-04	Phantom Stock	$	M	841	Disposed		Common Stock (841.0)	Direct
2022-04-06	Phantom Stock	$	A	40.83	Acquired		Common Stock (40.83)	Direct

Footnotes

F1: Pursuant to the Reporting Person's election to participate in the Iron Mountain Incorporated Directors Deferred Compensation Plan (the "Plan"), the shares of phantom stock (the "Phantom Shares") will become payable in shares of Iron Mountain Incorporated common stock ("Common Stock") on various dates selected by the Reporting Person or as otherwise provided in the Plan. Each Phantom Share is the economic equivalent of one share of Common Stock.

F2: Represents Common Stock otherwise issuable to the Reporting Person for which cash was paid, based on the closing price of Common Stock on the New York Stock Exchange on the transaction date.

F3: Settlement of the Phantom Shares is in cash.

F4: Settlement of the Phantom Shares is made in accordance with distribution elections made by the Reporting Person or as otherwise provided in the Plan.

F5: These shares give effect to dividends paid on Common Stock as if reinvested in Phantom Shares.