SCHEDULE: Vanguard Group Amends Iron Mountain Stake to Zero
Beneficial Ownership Amendment
The Vanguard Group reported a 0% beneficial ownership in Iron Mountain Inc. following an internal realignment, disaggregating its reporting.
Summary
- The Vanguard Group filed an Amendment No. 12 to Schedule 13G regarding its beneficial ownership of Iron Mountain Inc. Common Stock.
- As of March 13, 2026, The Vanguard Group reported 0 shares beneficially owned, representing 0% of the class.
- This change is due to an internal realignment on January 12, 2026, where certain subsidiaries or business divisions will now report beneficial ownership separately.
- The Vanguard Group, Inc. no longer has, or is deemed to have, beneficial ownership over securities beneficially owned by these disaggregated entities, in accordance with SEC Release No. 34-39538 (January 12, 1998).
Sentiment
Score: 5
Explanation: StockSavvy.ai views this as a neutral administrative update regarding The Vanguard Group's internal reporting structure, with no direct positive or negative implications for Iron Mountain Inc.'s operational or financial performance.
Future Outlook
NA
Management Comments
- On January 12, 2026, The Vanguard Group, Inc. went through an internal realignment.
- Certain subsidiaries or business divisions of subsidiaries of The Vanguard Group, Inc., that formerly had, or were deemed to have, beneficial ownership with The Vanguard Group, Inc., will report beneficial ownership separately (on a disaggregated basis) from The Vanguard Group, Inc. in reliance on SEC Release No. 34-39538 (January 12, 1998).
- The Vanguard Group, Inc. no longer has, or is deemed to have, beneficial ownership over securities beneficially owned by such subsidiaries and/or business divisions.
Industry Context
StockSavvy.ai notes that this filing reflects an administrative change in how a major institutional investor, The Vanguard Group, reports its holdings, rather than a change in its underlying investment strategy or a divestment from Iron Mountain Inc. This disaggregated reporting aligns with SEC guidance for large investment complexes.
Key Dates
| Date | Description |
|---|---|
| January 12, 1998 | SEC Release No. 34-39538, referenced for disaggregated reporting guidance. |
| January 12, 2026 | Date of The Vanguard Group, Inc.'s internal realignment. |
| March 13, 2026 | Date of event which requires filing of this statement. |
| March 27, 2026 | Date of signature for the filing. |
Keywords
Iron Mountain Inc, Vanguard Group, Schedule 13G, Beneficial Ownership, SEC Filing, Institutional Investor, Common Stock, Internal Realignment
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