Mark Kidd - 16 Feb 2026 Form 4 Insider Report for IRON MOUNTAIN INC (IRM)

Role
EVP, GM Data Centers & ALM
Signature
/s/ Christine Zhang, under Power of Attorney dated June 19, 2025, from Mark Kidd
Issuer symbol
IRM
Transactions as of
16 Feb 2026
Net transactions value
$0
Form type
4
Filing time
18 Feb 2026, 17:22:50 UTC
Previous filing
06 Jan 2026
Next filing
24 Feb 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Kidd Mark EVP, GM Data Centers & ALM C/O IRON MOUNTAIN INCORPORATED, 85 NEW HAMPSHIRE AVENUE, SUITE 150, PORTSMOUTH /s/ Christine Zhang, under Power of Attorney dated June 19, 2025, from Mark Kidd 18 Feb 2026 0001732058

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction IRM Performance Units Award $0 +106,977 +250% $0.000000 149,768 16 Feb 2026 Common Stock, par value $.01 per share 106,977 Direct F1, F2, F3
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Each Performance Unit ("PU") represents a contingent right to receive one share of Iron Mountain Incorporated common stock ("Common Stock").
F2 The PUs were initially granted to the Reporting Person on March 1, 2023. This Form 4 is being filed to reflect the determination by the Compensation Committee, effective as of February 16, 2026, of the actual award of PUs under the grant after completion of the relevant performance period.
F3 The PU were initially granted to the Reporting Person on March 1, 2023, and will fully vest on March 1, 2026.