Mark Kidd - 14 Feb 2025 Form 4 Insider Report for IRON MOUNTAIN INC (IRM)

Role: EVP, GM Data Centers & ALM
Signature: /s/ Keely Stewart, under Power of Attorney dated April 17, 2023, from Mark Kidd
Issuer symbol: IRM
Transactions as of: 14 Feb 2025
Net transactions value: $0
Form type: 4
Filing time: 18 Feb 2025, 17:50:12 UTC
Previous filing: 02 Apr 2024
Next filing: 04 Mar 2025
SEC: View on sec.gov

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	Performance Units	Award	$0	+39,257	+250%	$0.000000	54,960	14 Feb 2025	Common Stock	39,257		Direct	F1, F2, F3

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

Explanation of Responses:

Id	Content
F1	Each PU represents a contingent right to receive one share of Iron Mountain Incorporated common stock ("Common Stock").
F2	The PUs were initially granted to the Reporting Person on March 1, 2022. This Form 4 is being filed to reflect the determination by the Compensation Committee, effective as of February 14, 2025, of the actual award of PUs under the grant after completion of the relevant performance period.
F3	The PU were initially granted to the Reporting Person on March 1, 2022, and will fully vest on March 1, 2025.