Greg McIntosh - 01 Jul 2025 Form 4 Insider Report for IRON MOUNTAIN INC (IRM)

Role: EVP, CCO & GM, Global RM
Signature: /s/ Christine Zhang, under Power of Attorney dated June 19, 2025, from Greg McIntosh
Issuer symbol: IRM
Transactions as of: 01 Jul 2025
Net transactions value: -$1,733,469
Form type: 4
Filing time: 02 Jul 2025, 17:03:14 UTC
Previous filing: 03 Jun 2025
Next filing: 05 Aug 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
McIntosh Greg W	EVP, CCO & GM, Global RM	C/O IRON MOUNTAIN INCORPORATED, 85 NEW HAMPSHIRE AVENUE, SUITE 150, PORTSMOUTH	/s/ Christine Zhang, under Power of Attorney dated June 19, 2025, from Greg McIntosh	02 Jul 2025	0001769841

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	IRM	Common Stock, par value $.01 per share	Sale	$1,733,469	-17,334	-33%	$100.00	35,446	01 Jul 2025	Direct	F1, F2

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

Buy Plan / Sale Plan: These are also open market purchases/sales of shares, but in this case the transaction is part of a trading plan. Rule 10b5-1 allows insiders to setup a trading plan to buy/sell stocks over a certain period of time. Since the purchases/sales are predetermined, this protects the insiders from violating insider trading law.

Transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c).

Explanation of Responses:

Id	Content
F1	The transaction was made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 21, 2025.
F2	The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $100.000 to $100.040, inclusive. The Reporting Person undertakes to provide Iron Mountain Incorporated any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares of Common Stock sold at each separate price within the ranges set forth in this footnote (2).

Content

The transaction was made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 21, 2025.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $100.000 to $100.040, inclusive. The Reporting Person undertakes to provide Iron Mountain Incorporated any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares of Common Stock sold at each separate price within the ranges set forth in this footnote (2).