Michelle Vervais Altamura - 02 Jan 2025 Form 4 Insider Report for IRON MOUNTAIN INC (IRM)

Role: EVP, General Counsel, Sec.
Signature: /s/ Christine Zhang, under Power of Attorney dated September 17, 2024, from Michelle Altamura
Issuer symbol: IRM
Transactions as of: 02 Jan 2025
Net transactions value: -$49,123
Form type: 4
Filing time: 03 Jan 2025, 16:35:50 UTC
Previous filing: 03 Oct 2024
Next filing: 04 Mar 2025
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	+1,214	+53%	$0.000000	3,500	02 Jan 2025	Direct	F1
transaction	IRM	Common Stock, par value $.01 per share	Tax liability	$49,123	-469	-13%	$104.74	3,031	02 Jan 2025	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	-1,214	-33%	$0.000000	2,428	02 Jan 2025	Common Stock	1,214		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 January 2, 2024.
F2	Each RSU represents a contingent right to receive one share of Common Stock.
F3	RSUs, representing a contingent right to receive a total of 3,642 shares of Common Stock, were granted to the Reporting Person on January 2, 2024 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.