IRON MOUNTAIN INC — Director's Dealing 2026

Feb 18, 2026

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: IRON MOUNTAIN INC (IRM)
CIK: 0001020569
Period of Report: 2026-02-16

Reporting Person: Hytinen Barry (EVP and CFO)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2026-02-16	Performance Units	$	A	166412	Acquired		Common Stock, par value $.01 per share (166412)	Direct

Footnotes

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.