Greg McIntosh - Mar 25, 2022 Form 4 Insider Report for IRON MOUNTAIN INC (IRM)

Role: EVP, GM, Global RM
Signature: /s/ Elizabeth Tammaro, under Power of Attorney dated February 26, 2019 from Greg McIntosh
Stock symbol: IRM
Transactions as of: Mar 25, 2022
Transactions value $: -$224,668
Form type: 4
Date filed: 3/29/2022, 07:49 PM
Previous filing: Mar 3, 2022
Next filing: Aug 10, 2022

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	IRM	Common Stock, par value $.01 per share	Options Exercise	$0	+2.28K	+26.78%	$0.00	10.8K	Mar 25, 2022	Direct	F1
transaction	IRM	Common Stock, par value $.01 per share	Tax liability	-$64.9K	-1.22K	-11.3%	$53.34	9.55K	Mar 25, 2022	Direct
transaction	IRM	Common Stock, par value $.01 per share	Options Exercise	$0	+5.6K	+58.57%	$0.00	15.2K	Mar 25, 2022	Direct	F2
transaction	IRM	Common Stock, par value $.01 per share	Tax liability	-$160K	-3K	-19.77%	$53.34	12.2K	Mar 25, 2022	Direct

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	IRM	Restricted Stock Units	Options Exercise	$0	-2.28K	-100%	$0.00^*	0	Mar 25, 2022	Common Stock	2.28K		Direct	F3, F4
transaction	IRM	Performance Units	Award	$0	+5.6K		$0.00	5.6K	Mar 25, 2022	Common Stock	5.6K		Direct	F5, F6
transaction	IRM	Performance Units	Options Exercise	$0	-5.6K	-100%	$0.00^*	0	Mar 25, 2022	Common Stock	5.6K		Direct	F5, F7

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	This acquisition is reported to reflect the partial vesting of restricted stock units ("RSUs") previously granted to the Reporting Person on March 25, 2019.
F2	This acquisition is reported to reflect the full vesting of performance units ("PUs") previously granted to the Reporting Person on March 25, 2019. Effective February 24, 2022, the Compensation Committee of Iron Mountain Incorporated's Board of Directors (the "Compensation Committee") determined the actual award of PUs under the grant after completion of the relevant performance period, and the PUs vested in full on March 25, 2022.
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 6,822 shares of Common Stock, were granted to the Reporting Person on March 25, 2019 and are fully vested.
F5	Each PU represents a contingent right to receive one share of Iron Mountain Incorporated Common Stock.
F6	The PUs were initially granted to the Reporting Person on March 25, 2019 and fully vested on March 25, 2022.
F7	The PUs were initially granted to the Reporting Person on March 25, 2019. Effective February 24, 2022, the Compensation Committee determined the actual award of PUs under the grant after completion of the relevant performance period, and the PUs vested in full on March 25, 2022.