SCHEDULE: Vanguard Reports 7.35% Stake in Iron Mountain

Vanguard Capital Management has disclosed a beneficial ownership of 7.35% in Iron Mountain Inc. as of March 31, 2026.

Summary

• Vanguard Capital Management, along with its affiliates, now beneficially owns 21,872,303 shares of Iron Mountain Inc. common stock.
• This holding represents 7.35% of the class of securities.
• Vanguard Capital Management has sole voting power over 3,113,414 shares and sole dispositive power over all 21,872,303 shares.
• The filing indicates that Vanguard funds and other managed accounts have the right to receive dividends or direct the sale of these securities, but no single other person holds more than a 5% interest.

Sentiment

Score: 6

Explanation: StockSavvy.ai views this as a neutral to slightly positive indicator, reflecting a significant institutional investor's sustained interest and confidence in Iron Mountain's business model and market position.

Positives

• Vanguard's significant stake suggests confidence in Iron Mountain's long-term prospects.
• The filing confirms a substantial institutional investor's commitment to the company.

Negatives

• No specific financial performance data or forward-looking statements are included in this Schedule 13G filing, limiting the assessment of company performance.

Risks

• The filing does not detail specific risks, but as a Schedule 13G, it primarily reports ownership, not operational risks of Iron Mountain.

Future Outlook

This filing is a Schedule 13G, which reports beneficial ownership and does not contain forward-looking statements or guidance from Iron Mountain Inc.

Industry Context

StockSavvy.ai notes that Vanguard's increased stake in Iron Mountain, a leader in information management and data protection, aligns with broader trends of institutional investors consolidating positions in established companies with recurring revenue models, particularly those undergoing digital transformation.

Stakeholder Impact

• Shareholders: The increased stake by a major institutional investor like Vanguard may be viewed positively, potentially signaling stability and long-term commitment.
• Employees: Continued investment by large funds can contribute to company stability, which may indirectly benefit employees.
• Creditors: A stable, well-supported shareholder base can be seen as a positive factor for the company's financial health, potentially benefiting creditors.

Next Steps

• Vanguard Capital Management will continue to monitor its investment in Iron Mountain Inc.

Key Dates

Keywords

Iron Mountain Inc, Vanguard Capital Management, Schedule 13G, Beneficial Ownership, Institutional Investor, Common Stock, SEC Filing