Mark Kidd - 02 Jan 2026 Form 4 Insider Report for IRON MOUNTAIN INC (IRM)

Signature
/s/ Christine Zhang, under Power of Attorney dated June 19, 2025, from Mark Kidd
Issuer symbol
IRM
Transactions as of
02 Jan 2026
Net transactions value
-$498,600
Form type
4
Filing time
06 Jan 2026, 18:16:37 UTC
Previous filing
03 Dec 2025

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Kidd Mark EVP, GM Data Centers & ALM C/O IRON MOUNTAIN INCORPORATED, 85 NEW HAMPSHIRE AVENUE, SUITE 150, PORTSMOUTH /s/ Christine Zhang, under Power of Attorney dated June 19, 2025, from Mark Kidd 06 Jan 2026 0001732058

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 $498,600 -6,000 -9.8% $83.10 55,081 02 Jan 2026 Direct F1
* 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 March 20, 2025.