Mark Kidd - 31 Oct 2025 Form 4 Insider Report for IRON MOUNTAIN INC (IRM)

Reporting relationship: EVP, GM Data Centers & ALM
Issuer ticker: IRM
Reported as of: 31 Oct 2025
Net transaction value: -$736,591
SEC form: 4
Accepted by SEC: 03 Nov 2025, 16:09:14 UTC
Prior SEC filing: 03 Oct 2025
Next SEC filing: 05 Nov 2025
Source filing: View source filing
Reporting owner signature: /s/ Christine Zhang, under Power of Attorney dated June 19, 2025, from Mark Kidd

Key filing fact

Mark Kidd filed Form 4 for IRON MOUNTAIN INC (IRM) on 03 Nov 2025.

Key facts

This page summarizes Mark Kidd's Form 4 filing for IRON MOUNTAIN INC (IRM).
3 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 03 Nov 2025, 16:09.

Change

Previous filing in this sequence was filed on 03 Oct 2025.
Current net transaction value: -$736,591.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001732058 Primary reporting owner

Kidd Mark

Relationship: EVP, GM Data Centers & ALM
Address: C/O IRON MOUNTAIN INCORPORATED, 85 NEW HAMPSHIRE AVENUE, SUITE 150, PORTSMOUTH
Signature: /s/ Christine Zhang, under Power of Attorney dated June 19, 2025, from Mark Kidd
Signature date: 03 Nov 2025

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

IRM transaction

Common Stock, par value $.01 per share

Options Exercise

Transaction value: $229,847
Shares: +7,306
Change %: +10%
Price: $31.46
Shares after: 80,387
Date: 31 Oct 2025
Ownership: Direct
Footnotes: F1

IRM transaction

Common Stock, par value $.01 per share

Sale

Transaction value: $736,591
Shares: -7,306
Change %: -9.1%
Price: $100.82
Shares after: 73,081
Date: 31 Oct 2025
Ownership: Direct
Footnotes: F1

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

IRM transaction Derivative

Employee Stock Option (Right to Buy)

Options Exercise

Transaction value: $229,847
Shares: -7,306
Change %: -100%
Price: $31.46
Shares after: 0
Date: 31 Oct 2025
Ownership: Direct
Underlying class: Common Stock, par value $.01 per share
Underlying amount: 7,306
Exercise price: $31.46
Footnotes: F1, F2

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Rule 10b5-1 trading plan

These transactions were reported as open-market trades under a Rule 10b5-1 plan. The plan lets an insider set trading instructions in advance, which can reduce the risk of trading while in possession of material nonpublic information.

Original filing language: transaction made pursuant to a contract, instruction, or written plan intended to satisfy Rule 10b5-1(c).

Explanation of responses 2 footnotes

Footnote F1

The transaction was made pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 20, 2025.

Footnote F2

This stock option, representing a right to purchase a total of 7,306 shares, is fully vested.