Form 4: Iron Mountain Exec's RSU Vesting & Tax Withholding

Iron Mountain's EVP, General Counsel, and Secretary, Michelle Altamura, reported the vesting of restricted stock units and related tax withholdings on March 1, 2026.

Summary

• Michelle Altamura, EVP, General Counsel, and Secretary of Iron Mountain Inc. (IRM), reported changes in her beneficial ownership.
• On March 1, 2026, 1,458 shares of Common Stock vested from Restricted Stock Units (RSUs) previously granted on March 1, 2023.
• Additionally, 432 shares of Common Stock vested from RSUs previously granted on March 1, 2024.
• Another 1,073 shares of Common Stock vested from RSUs previously granted on March 1, 2025.
• A total of 987 shares (486 + 144 + 357) were withheld by Iron Mountain to cover income tax obligations in connection with these RSU vestings, at a price of $108.33 per share.
• Following these transactions, Altamura directly owns 7,728 shares of Common Stock.
• Remaining unvested RSUs include 432 from the March 1, 2024 grant and 2,146 from the March 1, 2025 grant.

Sentiment

Score: 5

Explanation: StockSavvy.ai views this as a neutral event, representing routine executive compensation activity with no material positive or negative implications for the company's operational or financial performance.

Positives

• Vesting of restricted stock units indicates the achievement of performance or time-based conditions, reflecting continued employment and potentially positive company performance over the vesting period.
• The reporting person's direct beneficial ownership of 7,728 shares of Common Stock demonstrates continued alignment with shareholder interests.

Negatives

• The disposition of 987 shares for tax withholding purposes reduces the direct shareholding of the reporting person, although this is a standard practice for RSU vesting.

Future Outlook

This Form 4 filing does not contain forward-looking statements or guidance regarding the company's future performance or strategic direction. It reports past transactions related to executive compensation.

Industry Context

StockSavvy.ai notes that RSU vesting and subsequent tax withholdings are routine events for executives in publicly traded companies, reflecting standard compensation practices. This filing does not indicate any unusual activity or significant shifts in industry trends.

Comparison to Industry Standards

• This filing reflects standard executive compensation practices involving Restricted Stock Units (RSUs) and the common procedure of 'net settlement' where shares are withheld to cover tax liabilities upon vesting. This is consistent with practices observed at comparable companies such as Microsoft (MSFT), Apple (AAPL), and Google (GOOGL), where executives regularly report RSU vestings and tax-related dispositions.
• Similar Form 4 filings from executives at these tech giants often show dispositions for tax purposes at prevailing market prices, aligning with the $108.33 per share price reported for Iron Mountain's tax withholding.

Stakeholder Impact

• Shareholders: Minor dilution from RSU issuance is already factored into compensation plans; the tax withholding reduces the number of shares entering the market from this specific vesting event.
• Employees (executives): Michelle Altamura's compensation package continues to be realized through equity vesting, aligning her interests with company performance.

Next Steps

• Future vesting installments for RSUs granted on March 1, 2024, and March 1, 2025, will occur on their respective schedules.

Key Dates

Recommendation

This Form 4 filing details routine RSU vesting and tax-related share dispositions by an executive. It provides no new information regarding the company's operational performance, financial health, or strategic direction that would warrant a change in investment recommendation. The transactions are expected and do not signal any material positive or negative developments for Iron Mountain, thus a 'hold' recommendation is appropriate.

Keywords

Iron Mountain, IRM, SEC Form 4, Insider Transaction, Restricted Stock Units, RSU Vesting, Executive Compensation, Stock Ownership, Michelle Altamura