Iron Mountain Incorporated
DE ˙ DB ˙ US46284V1017
111,85 € ↑2,30 (2,10%)
2026-06-05
DEL PRIS
SecurityDE:I5M / Iron Mountain Incorporated
InstitutionPrincipal Securities, Inc.
Latest Disclosed Ownership13,179 shares
Latest Disclosed Value $ 1,346,091
Principal Securities, Inc. reports 126.75% increase in ownership of I5M / Iron Mountain Incorporated

On May 13, 2026 - Principal Securities, Inc. filed a 13F-HR form disclosing ownership of 13,179 shares of Iron Mountain Incorporated (DE:I5M) valued at $1,170,032 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 5,812 shares of Iron Mountain Incorporated. This represents a change in shares of 126.75% during the quarter. The current value of the position is $1,474,071 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-13 2026-03-31 13F IRON MTN INC DEL COM 46284V101 13,179 7,367 126.75 1,346 179.25 0.0197
2026-02-12 2025-12-31 13F IRON MTN INC DEL COM 46284V101 5,812 258 4.65 482 -14.84 0.0074
2025-11-12 2025-09-30 13F IRON MTN INC DEL COM 46284V101 5,554 -599 -9.74 566 -10.30 0.0093
2025-08-11 2025-06-30 13F IRON MTN INC DEL COM 46284V101 6,153 -6,389 -50.94 631 -52.12 0.0119
2025-04-30 2025-03-31 13F IRON MTN INC DEL COM 46284V101 12,542 0 0.00 1,318 0.00 0.0295
2025-01-30 2024-12-31 13F IRON MTN INC DEL COM 46284V101 12,542 -138 -1.09 1,318 -12.48 0.0297
2024-10-28 2024-09-30 13F IRON MTN INC DEL COM 46284V101 12,680 396 3.22 1,507 36.91 0.0364
2024-07-31 2024-06-30 13F IRON MTN INC DEL COM 46284V101 12,284 509 4.32 1,101 16.53 0.0303
2024-05-10 2024-03-31 13F IRON MTN INC DEL COM 46284V101 11,775 567 5.06 944 20.41 0.0294
2024-05-10 2023-12-31 13F/A-1 IRON MTN INC DEL COM 46284V101 11,208 11,208 784 0.0292
2024-02-07 2023-12-31 13F IRON MTN INC DEL COM 46284V101 11,208 11,208 784 0.0292
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.