Mark Kidd - Feb 22, 2022 Form 4 Insider Report for IRON MOUNTAIN INC (IRM)

Role: EVP, GM Data Centers
Signature: /s/ Elizabeth Tammaro, under Power of Attorney dated February 13, 2018 from Mark Kidd
Stock symbol: IRM
Transactions as of: Feb 22, 2022
Transactions value $: -$126,674
Form type: 4
Date filed: 2/24/2022, 05:54 PM
Next filing: Feb 28, 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	+4.22K	+20.77%	$0.00	24.5K	Feb 22, 2022	Direct	F1
transaction	IRM	Common Stock, par value $.01 per share	Tax liability	-$84.3K	-1.98K	-8.06%	$42.68	22.5K	Feb 22, 2022	Direct
transaction	IRM	Common Stock, par value $.01 per share	Options Exercise	$0	+2.24K	+9.94%	$0.00	24.8K	Feb 22, 2022	Direct	F2
transaction	IRM	Common Stock, par value $.01 per share	Tax liability	-$42.4K	-993	-4.01%	$42.68	23.8K	Feb 22, 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	-4.22K	-50%	$0.00	4.22K	Feb 22, 2022	Common Stock	4.22K		Direct	F3, F4
transaction	IRM	Restricted Stock Units	Options Exercise	$0	-2.24K	-100%	$0.00^*	0	Feb 22, 2022	Common Stock	2.24K		Direct	F3, F5

* 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 February 19, 2020.
F2	This acquisition is reported to reflect the partial vesting of RSUs previously granted to the Reporting Person on February 20, 2019.
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 12,647 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.
F5	The RSUs, representing a contingent right to receive a total of 6,718 shares of Common Stock, were granted to the Reporting Person on February 20, 2019 and are fully vested.