Mithu Bhargava - 19 Mar 2026 Form 4 Insider Report for IRON MOUNTAIN INC (IRM)

Reporting relationship: EVP, GM Digital Business Unit
Issuer ticker: IRM
Reported as of: 19 Mar 2026
Net transaction value: -$6,248,239
SEC form: 4
Accepted by SEC: 23 Mar 2026, 16:14:34 UTC
Prior SEC filing: 03 Mar 2026
Source filing: View source filing
Reporting owner signature: /s/ Christine Zhang, under Power of Attorney dated November 19, 2024, from Mithu Bhargava

Key filing fact

Mithu Bhargava filed Form 4 for IRON MOUNTAIN INC (IRM) on 23 Mar 2026.

Key facts

This page summarizes Mithu Bhargava's Form 4 filing for IRON MOUNTAIN INC (IRM).
5 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 23 Mar 2026, 16:14.

Change

Previous filing in this sequence was filed on 03 Mar 2026.
Current net transaction value: -$6,248,239.

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 0002045996 Primary reporting owner

Bhargava Mithu

Relationship: EVP, GM Digital Business Unit
Address: C/O IRON MOUNTAIN INCORPORATED, 85 NEW HAMPSHIRE AVE, SUITE 150, PORTSMOUTH
Signature: /s/ Christine Zhang, under Power of Attorney dated November 19, 2024, from Mithu Bhargava
Signature date: 23 Mar 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

Sale

Transaction value: $1,486,605
Shares: -14,260
Change %: -19%
Price: $104.25
Shares after: 61,519
Date: 19 Mar 2026
Ownership: Direct
Footnotes: F1, F2

IRM transaction

Common Stock, par value $.01 per share

Sale

Transaction value: $1,316,886
Shares: -12,537
Change %: -20%
Price: $105.04
Shares after: 48,982
Date: 19 Mar 2026
Ownership: Direct
Footnotes: F1, F3

IRM transaction

Common Stock, par value $.01 per share

Sale

Transaction value: $2,113
Shares: -20
Change %: -0.04%
Price: $105.64
Shares after: 48,962
Date: 19 Mar 2026
Ownership: Direct
Footnotes: F1

IRM transaction

Common Stock, par value $.01 per share

Sale

Transaction value: $2,134,187
Shares: -20,462
Change %: -42%
Price: $104.30
Shares after: 28,500
Date: 19 Mar 2026
Ownership: Direct
Footnotes: F1, F4

IRM transaction

Common Stock, par value $.01 per share

Sale

Transaction value: $1,308,448
Shares: -12,446
Change %: -44%
Price: $105.13
Shares after: 16,054
Date: 19 Mar 2026
Ownership: Direct
Footnotes: F1, F5

^* 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 5 footnotes

Footnote F1

The transaction was made pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 19, 2025.

Footnote F2

The price reported in Column 4 is a weighted average price. These shares of Iron Mountain Incorporated common stock ("Common Stock") were sold in multiple transactions at prices ranging from $103.62 to $104.61, inclusive. The Reporting Person undertakes to provide Iron Mountain Incorporated (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 sold at each separate price within the ranges set forth in this footnote (2).

Footnote F3

The price reported in Column 4 is a weighted average price. These shares of Common Stock were sold in multiple transactions at prices ranging from $104.62 to $105.56, 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 sold at each separate price within the ranges set forth in this footnote (3).

Footnote F4

The price reported in Column 4 is a weighted average price. These shares of Common Stock were sold in multiple transactions at prices ranging from $103.71 to $104.70, 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 sold at each separate price within the ranges set forth in this footnote (4).

Footnote F5

The price reported in Column 4 is a weighted average price. These shares of Common Stock were sold in multiple transactions at prices ranging from $104.71 to $105.56, 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 sold at each separate price within the ranges set forth in this footnote (5).