Barry A. Hytinen - 22 Feb 2022 Form 4 Insider Report for IRON MOUNTAIN INC (IRM)

Role: EVP and CFO
Signature: /s/ Elizabeth Tammaro, under Power of Attorney dated January 1, 2020, from Barry A. Hytinen
Issuer symbol: IRM
Transactions as of: 22 Feb 2022
Net transactions value: -$142,765
Form type: 4
Filing time: 24 Feb 2022, 17:45:38 UTC
Previous filing: 05 Jan 2022
Next filing: 03 Mar 2022
SEC: View on sec.gov

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	+7,544	+22%	$0.000000	41,377	22 Feb 2022	Direct	F1
transaction	IRM	Common Stock, par value $.01 per share	Tax liability	$142,765	-3,345	-8.1%	$42.68	38,032	22 Feb 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	-7,544	-50%	$0.000000	7,545	22 Feb 2022	Common Stock	7,544		Direct	F2, F3

* 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	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.