Key facts
- This page summarizes Mithu Bhargava's Form 4 filing for IRON MOUNTAIN INC (IRM).
- 13 reported transactions and 5 derivative rows are listed below.
- Accepted by SEC: 03 Mar 2026, 19:15.
Mithu Bhargava - 01 Mar 2026 Form 4 Insider Report for IRON MOUNTAIN INC (IRM)
- Reporting relationship
- EVP, GM Digital Business Unit
- Issuer ticker
- IRM
- Reported as of
- 01 Mar 2026
- Net transaction value
- -$6,058,355
- SEC form
- 4
- Accepted by SEC
- 03 Mar 2026, 19:15:52 UTC
- Prior SEC filing
- 18 Feb 2026
- Next SEC filing
- 23 Mar 2026
- Source filing
- View source filing
- Reporting owner signature
- /s/ Christine Zhang, under Power of Attorney dated November 19, 2024, from Mithu Bhargava
Source evidence
Original filing metadata and source links for verification.
5 source fields
Reporting owner
1 detail
Key filing fact
Mithu Bhargava filed Form 4 for IRON MOUNTAIN INC (IRM) on 03 Mar 2026.
Change
- Previous filing in this sequence was filed on 18 Feb 2026.
- Current net transaction value: -$6,058,355.
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
View source filing
Ownership activity is grounded in SEC Form 4 disclosures.
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
- 03 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
Options Exercise
- Transaction value
- $0
- Shares
- +51,919
- Change %
- +392%
- Price
- $0.000000
- Shares after
- 65,174
- Date
- 01 Mar 2026
- Ownership
- Direct
- Footnotes
- F1, F2
IRM
transaction
Common Stock, par value $.01 per share
Tax liability
- Transaction value
- $2,719,300
- Shares
- -25,102
- Change %
- -39%
- Price
- $108.33
- Shares after
- 40,072
- Date
- 01 Mar 2026
- Ownership
- Direct
- Footnotes
- F2, F3
IRM
transaction
Common Stock, par value $.01 per share
Options Exercise
- Transaction value
- $0
- Shares
- +61,113
- Change %
- +153%
- Price
- $0.000000
- Shares after
- 101,185
- Date
- 01 Mar 2026
- Ownership
- Direct
- Footnotes
- F2, F4
IRM
transaction
Common Stock, par value $.01 per share
Tax liability
- Transaction value
- $3,055,448
- Shares
- -28,205
- Change %
- -28%
- Price
- $108.33
- Shares after
- 72,980
- Date
- 01 Mar 2026
- Ownership
- Direct
- Footnotes
- F2, F3
IRM
transaction
Common Stock, par value $.01 per share
Options Exercise
- Transaction value
- $0
- Shares
- +2,663
- Change %
- +3.6%
- Price
- $0.000000
- Shares after
- 75,643
- Date
- 01 Mar 2026
- Ownership
- Direct
- Footnotes
- F2, F5
IRM
transaction
Common Stock, par value $.01 per share
Tax liability
- Transaction value
- $139,421
- Shares
- -1,287
- Change %
- -1.7%
- Price
- $108.33
- Shares after
- 74,356
- Date
- 01 Mar 2026
- Ownership
- Direct
- Footnotes
- F2, F6
IRM
transaction
Common Stock, par value $.01 per share
Options Exercise
- Transaction value
- $0
- Shares
- +2,754
- Change %
- +3.7%
- Price
- $0.000000
- Shares after
- 77,110
- Date
- 01 Mar 2026
- Ownership
- Direct
- Footnotes
- F2, F7
IRM
transaction
Common Stock, par value $.01 per share
Tax liability
- Transaction value
- $144,187
- Shares
- -1,331
- Change %
- -1.7%
- Price
- $108.33
- Shares after
- 75,779
- Date
- 01 Mar 2026
- Ownership
- Direct
- Footnotes
- F2, F6
Reported derivative securities
Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.
IRM
transaction
Derivative
Performance Units
Options Exercise
- Transaction value
- $0
- Shares
- -51,919
- Change %
- -100%
- Price
- $0.000000
- Shares after
- 0
- Date
- 01 Mar 2026
- Ownership
- Direct
- Underlying class
- Common Stock, par value $.01 per share
- Underlying amount
- 51,919
- Exercise price
- Footnotes
- F8, F9
IRM
transaction
Derivative
Performance Units
Options Exercise
- Transaction value
- $0
- Shares
- -61,113
- Change %
- -100%
- Price
- $0.000000
- Shares after
- 0
- Date
- 01 Mar 2026
- Ownership
- Direct
- Underlying class
- Common Stock, par value $.01 per share
- Underlying amount
- 61,113
- Exercise price
- Footnotes
- F8, F10
IRM
transaction
Derivative
Restricted Stock Units
Options Exercise
- Transaction value
- $0
- Shares
- -2,663
- Change %
- -100%
- Price
- $0.000000
- Shares after
- 0
- Date
- 01 Mar 2026
- Ownership
- Direct
- Underlying class
- Common Stock, par value $.01 per share
- Underlying amount
- 2,663
- Exercise price
- Footnotes
- F11, F12
IRM
transaction
Derivative
Restricted Stock Units
Options Exercise
- Transaction value
- $0
- Shares
- -2,754
- Change %
- -33%
- Price
- $0.000000
- Shares after
- 5,510
- Date
- 01 Mar 2026
- Ownership
- Direct
- Underlying class
- Common Stock, par value $.01 per share
- Underlying amount
- 2,754
- Exercise price
- Footnotes
- F11, F13
IRM
transaction
Derivative
Restricted Stock Units
Award
- Transaction value
- $0
- Shares
- +9,692
- Change %
- Price
- $0.000000
- Shares after
- 9,692
- Date
- 01 Mar 2026
- Ownership
- Direct
- Underlying class
- Common Stock, par value $.01 per share
- Underlying amount
- 9,692
- Exercise price
- Footnotes
- F11, F14
* marks a reported price that did not pass the local price check.
Additional SEC filing notes
Filing notes and footnotes
Explanation of responses 14 footnotes
Footnote F1
This acquisition is reported to reflect the full vesting of performance units ("PUs") previously granted to the Reporting Person on March 1, 2023. Effective February 16, 2026, the Compensation Committee of Iron Mountain Incorporated's Board of Directors determined the actual award of PUs under the grant after completion of the relevant performance period, and the PUs fully vested on March 1, 2026.
Footnote F2
Includes 201 shares of Common Stock acquired under the Iron Mountain Incorporated Employee Stock Purchase Plan since the last Section 16 filing by the Reporting Person.
Footnote F3
Represents the number of shares of Common Stock that have been withheld by the Issuer to satisfy its income tax withholding obligation in connection with the net settlement of the PUs and does not represent a sale.
Footnote F4
This acquisition is reported to reflect the full vesting of PUs previously granted to the Reporting Person on July 3, 2023. Effective February 16, 2026, the Compensation Committee of Iron Mountain Incorporated's Board of Directors determined the actual award of PUs under the grant after completion of the relevant performance period, and the PUs fully vested on March 1, 2026.
Footnote F5
This acquisition is reported to reflect the full vesting of restricted stock units ("RSUs") previously granted to the Reporting Person on March 1, 2023.
Footnote F6
Represents the number of shares of Common Stock that have been withheld by the Issuer to satisfy its income tax withholding obligation in connection with the net settlement of the RSUs and does not represent a sale.
Footnote F7
This acquisition is reported to reflect the partial vesting of RSUs previously granted to the Reporting Person on March 1, 2025.
Footnote F8
Each PU represents a contingent right to receive one share of Common Stock.
Footnote F9
The PUs were initially granted to the Reporting Person on March 1, 2023. Effective as of February 16, 2026, the Compensation Committee determined the actual award of PUs under the grant after completion of the relevant performance period, and the PUs fully vested on March 1, 2026.
Footnote F10
The PUs were initially granted to the Reporting Person on July 3, 2023. Effective as of February 16, 2026, the Compensation Committee determined the actual award of PUs under the grant after completion of the relevant performance period, and the PUs fully vested on March 1, 2026.
Footnote F11
Each RSU represents a contingent right to receive one share of Common Stock.
Footnote F12
The RSUs, representing a contingent right to receive a total of 7,987 shares of Common Stock, were granted to the Reporting Person on March 1, 2023 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.
Footnote F13
The RSUs, representing a contingent right to receive a total of 8,264 shares of Common Stock, were granted to the Reporting Person on March 1, 2025 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.
Footnote F14
The RSUs, representing a contingent right to receive a total of 9,692 shares of Common Stock, were granted to the Reporting Person on March 1, 2026 and vest in three substantially equal annual installments beginning on the first anniversary of the grant date.