IRON MOUNTAIN INC — Director's Dealing 2021

Feb 18, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: IRON MOUNTAIN INC (IRM)
CIK: 0001020569
Period of Report: 2021-02-16

Reporting Person: Kidd Mark (EVP, GM Data Centers)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-02-16	Common Stock, par value $.01 per share	M	3378	—	Acquired	15237	Direct
2021-02-16	Common Stock, par value $.01 per share	F	1022	$32.97	Disposed	14215	Direct
2021-02-16	Common Stock, par value $.01 per share	M	1486	—	Acquired	15701	Direct
2021-02-16	Common Stock, par value $.01 per share	F	514	$32.97	Disposed	15187	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2021-02-16	Restricted Stock Units	$	M	3378	Disposed		Common Stock (3378.0)	Direct
2021-02-16	Restricted Stock Units	$	M	1486	Disposed		Common Stock (1486.0)	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 16, 2017.

F2: This acquisition is reported to reflect the partial vesting of RSUs previously granted to the Reporting Person on February 15, 2018.

F3: Each RSU represents a contingent right to receive one share of Iron Mountain Incorporated common stock ("Common Stock").

F4: The RSUs, representing a contingent right to receive a total of 6,756 shares of Common Stock, were granted to the Reporting Person on February 16, 2017 and have vested in full.

F5: The RSUs, representing a contingent right to receive a total of 4,448 shares of Common Stock, were granted to the Reporting Person on February 15, 2018 and have vested in full.