Iron Mountain Incorporated
DE ˙ DB ˙ US46284V1017
108,60 € ↓ -0,40 (-0,37%)
2026-05-29
DEL PRIS
SecurityDE:I5M / Iron Mountain Incorporated
InstitutionOssiam
Latest Disclosed Ownership13,154 shares
Latest Disclosed Value $ 1,343,550
Ossiam reports 3.99% increase in ownership of I5M / Iron Mountain Incorporated

On May 14, 2026 - Ossiam filed a 13F-HR form disclosing ownership of 13,154 shares of Iron Mountain Incorporated (DE:I5M) valued at $1,167,812 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 12,649 shares of Iron Mountain Incorporated. This represents a change in shares of 3.99% during the quarter. The current value of the position is $1,428,524 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)
2026-05-14 2026-03-31 13F IRON MTN INC DEL COM 46284V101 13,154 505 3.99 1,344 28.03 0.0236
2026-02-13 2025-12-31 13F IRON MTN INC DEL COM 46284V101 12,649 6,342 100.55 1,049 63.40 0.0210
2025-11-14 2025-09-30 13F IRON MTN INC DEL COM 46284V101 6,307 -8,966 -58.70 643 -59.00 0.0083
2025-08-13 2025-06-30 13F IRON MTN INC DEL COM 46284V101 15,273 -263 -1.69 1,567 17.22 0.0176
2025-05-14 2025-03-31 13F IRON MTN INC DEL COM 46284V101 15,536 -356 -2.24 1,337 -20.00 0.0187
2025-02-13 2024-12-31 13F IRON MTN INC DEL COM 46284V101 15,892 -182 -1.13 1,670 -12.57 0.0288
2024-11-13 2024-09-30 13F IRON MTN INC DEL COM 46284V101 16,074 -1,673 -9.43 1,910 20.13 0.0369
2024-08-13 2024-06-30 13F IRON MTN INC DEL COM 46284V101 17,747 -1,012 -5.39 1,590 5.72 0.0301
2024-05-13 2024-03-31 13F IRON MTN INC DEL COM 46284V101 18,759 -14,926 -44.31 1,505 -36.19 0.0264
2024-02-13 2023-12-31 13F IRON MTN INC DEL COM 46284V101 33,685 719 2.18 2,357 20.32 0.0380
2023-11-14 2023-09-30 13F IRON MTN INC DEL COM 46284V101 32,966 24,663 297.04 1,960 315.92 0.0346
2023-08-11 2023-06-30 13F IRON MTN INC DEL COM 46284V101 8,303 12 0.14 472 7.53 0.0085
2023-05-12 2023-03-31 13F IRON MTN INC DEL COM 46284V101 8,291 1,827 28.26 439 36.02 0.0091
2023-02-13 2022-12-31 13F IRON MTN INC DEL COM 46284V101 6,464 -23,862 -78.68 322 -75.84 0.0084
2022-11-14 2022-09-30 13F IRON MTN INC DEL COM 46284V101 30,326 30,326 1,333 0.0386
2022-05-13 2022-03-31 13F IRON MTN INC COM 46284V101 0 -14,278 -100.00 0 -100.00
2022-02-14 2021-12-31 13F IRON MTN INC COM 46284V101 14,278 2,630 22.58 747 47.63 0.0196
2021-11-12 2021-09-30 13F IRON MTN INC COM 46284V101 11,648 -1,670 -12.54 506 -13.21 0.0143
2021-08-13 2021-06-30 13F IRON MTN INC COM 46284V101 13,318 10,288 339.54 583 420.54 0.0158
2021-05-17 2021-03-31 13F IRON MTN INC COM 46284V101 3,030 3,030 112 0.0035
2021-02-12 2020-12-31 13F IRON MTN INC COM 46284V101 0 -6,886 -100.00 0 -100.00
2020-11-12 2020-09-30 13F IRON MTN INC COM 46284V101 6,886 5,258 322.97 184 338.10 0.0077
2020-08-13 2020-06-30 13F IRON MTN INC COM 46284V101 1,628 1,628 42 0.0027
2020-05-14 2020-03-31 13F IRON MTN INC COM 46284V101 0 -15,492 -100.00 0 -100.00
2020-02-14 2019-12-31 13F IRON MTN INC COM 46284V101 15,492 13,589 714.08 494 696.77 0.0377
2019-11-13 2019-09-30 13F IRON MTN INC COM 46284V101 1,903 -9,187 -82.84 62 -82.13 0.0043
2019-08-13 2019-06-30 13F IRON MTN INC COM 46284V101 11,090 11,090 347 0.0270
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.