IRON MOUNTAIN INC — Director's Dealing 2021

Feb 23, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: IRON MOUNTAIN INC (IRM)
CIK: 0001020569
Period of Report: 2021-02-19

Reporting Person: Hytinen Barry (EVP and CFO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-02-19	Common Stock, par value $.01 per share	M	7544	—	Acquired	18878	Direct
2021-02-19	Common Stock, par value $.01 per share	F	3345	$32.17	Disposed	15533	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2021-02-19	Restricted Stock Units	$	M	7544	Disposed		Common Stock (7544.0)	Direct

Footnotes

F1: This acquisition is reported to reflect the partial vesting of restricted stock units ("RSUs") previously granted to the Reporting Person on February 19, 2020.

F2: Each RSU represents a contingent right to receive one share of Iron Mountain Incorporated common stock ("Common Stock").

F3: The RSUs, representing a contingent right to receive a total of 22,633 shares of Common Stock, were granted to the Reporting Person on February 19, 2020 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.