Form 4: Iron Mountain Director Robin Matlock Acquires Phantom Stock Units

Director Robin Matlock acquired phantom stock units in Iron Mountain Incorporated through participation in the Directors Deferred Compensation Plan.

Summary

• On April 4, 2025, Robin Matlock, a director of Iron Mountain Incorporated, acquired 9.552 phantom stock units.
• The acquisition was made through participation in the Iron Mountain Incorporated Directors Deferred Compensation Plan.
• These phantom stock units are the economic equivalent of common stock and will be payable in shares of Iron Mountain Incorporated common stock on various dates selected by the Reporting Person.
• The price reported in Column 8 is a weighted average price.
• These shares of Common Stock were acquired in multiple transactions at prices ranging from $79.524 to $80.259, inclusive.
• Following the transaction, Matlock directly owns 982.881 shares of Iron Mountain common stock.

Sentiment

Score: 7

Explanation: The document reflects a routine transaction related to director compensation, indicating a stable and ongoing relationship between the director and the company. This is generally viewed as neutral to slightly positive.

Positives

• The director's participation in the deferred compensation plan demonstrates confidence in the company's future performance.

Future Outlook

The phantom stock units will become payable in shares of Iron Mountain Incorporated common stock on various dates selected by the Reporting Person or as otherwise provided in the Plan.

Industry Context

Form 4 filings are standard practice for reporting changes in beneficial ownership by company insiders, providing transparency to investors.

Comparison to Industry Standards

• Director compensation plans involving phantom stock are common among publicly traded companies, aligning director interests with shareholder value.
• Similar to Iron Mountain, companies like Equinix and Digital Realty Trust use equity-based compensation to incentivize long-term performance.

Stakeholder Impact

• The transaction has a minor positive impact on shareholders as it aligns the director's interests with the company's long-term performance.

Key Dates

Keywords

Iron Mountain, Robin Matlock, phantom stock, director, Form 4, Directors Deferred Compensation Plan, IRM, beneficial ownership