Doyle Simons - 07 May 2026 Form 4 Insider Report for IRON MOUNTAIN INC (IRM)

Reporting relationship: Director
Issuer ticker: IRM
Reported as of: 07 May 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 11 May 2026, 17:16:51 UTC
Prior SEC filing: 07 Apr 2026
Next SEC filing: 02 Jul 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 11 May 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: 11 May 2026, 17:16.

Change

Previous filing in this sequence was filed on 07 Apr 2026.
Current net transaction value: $0.

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: 11 May 2026

Reported non-derivative transactions

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

IRM transaction

Common Stock, par value $.01 per share

Award

Transaction value
Shares: +1,892
Change %
Price: $0.000000^*
Shares after: 1,892
Date: 07 May 2026
Ownership: Direct
Footnotes: F1

Reported derivative securities

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

IRM holding Derivative

Phantom Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 45,874
Date: 07 May 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 45,874
Exercise price
Footnotes: F2

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

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 2 footnotes

Footnote F1

Consists of shares issuable upon the settlement of restricted stock units ("RSUs") granted on May 7, 2026. The RSUs vest in their entirety on the grant date.

Footnote F2

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.