Iron Mountain CEO Files Form 144 to Sell $4.45M in Common Stock

Transaction Overview

Iron Mountain Inc ($IRM) President, CEO, and Director William L. Meaney has filed a Form 144 notice of proposed sale covering 38,474 shares of common stock with an aggregate market value of approximately $4.45 million ($115.60 per share). The transaction is scheduled for execution on or around September 1, 2026 on the NYSE via Fidelity Brokerage Services LLC.

Acquisition Details & Trading Plan

• Acquisition Source: Stock Option Exercise from Issuer via cash payment on September 1, 2026.
• Rule 10b5-1 Plan: The proposed sale is executed pursuant to a pre-arranged Rule 10b5-1 trading plan adopted on March 13, 2025.

Historical Insider Activity (Past 3 Months)

Mr. Meaney has maintained a consistent monthly option exercise and liquidation schedule:

• August 7, 2026: Sold 38,474 shares for gross proceeds of $4,681,000.77
• July 1, 2026: Sold 38,474 shares for gross proceeds of $4,725,826.83
• June 1, 2026: Sold 38,474 shares for gross proceeds of $4,907,512.60

Market Impact & Context

With 297,702,812 total shares outstanding, this proposed sale represents approximately 0.013% of total shares. While the transaction involves high-level executive equity liquidation, the programmatic execution under an established 10b5-1 plan reflects routine option monetization rather than discretionary market timing.