Iron Mountain CEO/Director Files Form 144 to Sell $4.26M Under 10b5-1 Plan

Executive Summary

On October 1, 2026, William L. Meaney, Officer and Director of Iron Mountain Inc ($IRM), filed a Form 144 notifying the proposed sale of 38,474 shares of common stock with an aggregate market value of approximately $4,259,841.28 (~$110.72 per share).

Transaction & Plan Details

• Acquisition Nature: The shares are being acquired on October 1, 2026, through a cash exercise of stock options directly from the issuer.
• Rule 10b5-1 Trading Plan: The proposed sale is executed pursuant to a pre-arranged Rule 10b5-1 plan established on March 13, 2025.
• Historical Activity: Meaney has consistently sold exactly 38,474 shares per month over the preceding three months:
  • July 1, 2026: 38,474 shares ($4,725,826.83)
  • August 7, 2026: 38,474 shares ($4,681,000.77)
  • September 1, 2026: 38,474 shares ($4,389,017.74)

Market Impact & Significance

This transaction carries Low informational significance. The sale is part of an established, recurring monthly 10b5-1 schedule linked to stock option exercises. It represents approximately 0.013% of the 297,702,812 shares outstanding, reflecting programmatic executive compensation monetization rather than discretionary trading sentiment.