Iron Mountain Officer Greg W. McIntosh Files Form 144 to Sell 5,000 Shares

Executive Summary

On September 1, 2026, Greg W. McIntosh, an Officer of Iron Mountain Inc ($IRM), filed a Form 144 notice proposing the sale of 5,000 shares of common stock with an aggregate market value of $578,000.00 (approximately $115.60 per share). The proposed sale is scheduled to be executed through Fidelity Brokerage Services LLC on the NYSE.

Key Transaction Details

• Shares to Sell: 5,000 shares
• Estimated Value: $578,000.00
• Source of Shares: Acquired on March 1, 2026, via restricted stock vesting as equity compensation from the issuer.
• Pre-Arranged Trading Plan: The proposed sale is governed by a Rule 10b5-1 trading plan adopted on May 8, 2026.
• Recent Prior Activity: Mr. McIntosh previously sold 11,839 shares on August 6, 2026, generating gross proceeds of $1,505,092.07.

Market & Governance Context

With 297,702,812 shares outstanding, the proposed 5,000-share sale represents a negligible fraction (<0.01%) of Iron Mountain's total equity base. Given that the transaction is executing under a pre-established 10b5-1 plan following routine equity compensation vesting, this activity carries low market significance.