Doyle Simons - 06 Jan 2026 Form 4 Insider Report for IRON MOUNTAIN INC (IRM)

Reporting relationship: Director
Issuer ticker: IRM
Reported as of: 06 Jan 2026
Net transaction value: +$38,910
SEC form: 4
Accepted by SEC: 08 Jan 2026, 17:29:55 UTC
Prior SEC filing: 05 Jan 2026
Next SEC filing: 02 Apr 2026
Source filing: View source filing
Reporting owner signature: /s/ Keely Stewart, under Power of Attorney dated April 17, 2023 from Doyle R. Simons

Key filing fact

Doyle Simons filed Form 4 for IRON MOUNTAIN INC (IRM) on 08 Jan 2026.

Key facts

This page summarizes Doyle Simons's Form 4 filing for IRON MOUNTAIN INC (IRM).
1 reported transaction and 1 derivative row are listed below.
Accepted by SEC: 08 Jan 2026, 17:29.

Change

Previous filing in this sequence was filed on 05 Jan 2026.
Current net transaction value: +$38,910.

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 0001185922 Primary reporting owner

Simons Doyle

Relationship: Director
Address: C/O IRON MOUNTAIN INCORPORATED, 85 NEW HAMPSHIRE AVENUE, SUITE 150, PORTSMOUTH
Signature: /s/ Keely Stewart, under Power of Attorney dated April 17, 2023 from Doyle R. Simons
Signature date: 08 Jan 2026

Reported derivative securities

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

IRM transaction Derivative

Phantom Stock

Award

Transaction value: $38,910
Shares: +460
Change %: +1%
Price: $84.62
Shares after: 45,494
Date: 06 Jan 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 460
Exercise price
Footnotes: F1, F2, F3

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

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 3 footnotes

Footnote F1

Pursuant to the Reporting Person's election to participate in the Iron Mountain Incorporated Directors Deferred Compensation Plan, the shares of phantom stock (the "Phantom Shares") will become payable in shares of Iron Mountain Incorporated common stock ("Common Stock") following the Reporting Person's disability or cessation of service as a director. Each Phantom Share is the economic equivalent of one share of Common Stock.

Footnote F2

These shares give effect to dividends paid on Common Stock as if reinvested in Phantom Shares.

Footnote F3

The price reported in Column 8 is a weighted average price. These shares of Common Stock were acquired in multiple transactions at prices ranging from $84.304 to $84.979, inclusive. The Reporting Person undertakes to provide the Company, 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 acquired at each separate price within the ranges set forth in this footnote (3).