Iron Mountain Incorporated
US ˙ NYSE ˙ US46284V1017

SecurityIRM / Iron Mountain Incorporated
InstitutionBenjamin Edwards Inc
Latest Disclosed Ownership21,816 shares
Latest Disclosed Value $ 2,228,223
Benjamin Edwards Inc reports 2.53% decrease in ownership of IRM / Iron Mountain Incorporated

On May 12, 2026 - Benjamin Edwards Inc filed a 13F-HR form disclosing ownership of 21,816 shares of Iron Mountain Incorporated (US:IRM) valued at $2,228,286 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 2, 2026 disclosing 22,382 shares of Iron Mountain Incorporated. This represents a change in shares of -2.53% during the quarter. The current value of the position is $2,791,357 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)
2026-05-12 2026-03-31 13F IRON MTN INC DEL COM 46284V101 21,816 -566 -2.53 2,228 20.04 0.0121
2026-02-02 2025-12-31 13F IRON MTN INC DEL COM 46284V101 22,382 -66 -0.29 1,857 -18.88 0.0205
2025-10-23 2025-09-30 13F IRON MTN INC DEL COM 46284V101 22,448 3,399 17.84 2,288 17.15 0.0259
2025-08-14 2025-06-30 13F IRON MTN INC DEL COM 46284V101 19,049 29 0.15 1,954 19.38 0.0249
2025-05-12 2025-03-31 13F IRON MTN INC DEL COM 46284V101 19,020 -3,319 -14.86 1,636 -30.29 0.0229
2025-02-14 2024-12-31 13F IRON MTN INC DEL COM 46284V101 22,339 -668 -2.90 2,348 -14.12 0.0336
2024-11-14 2024-09-30 13F IRON MTN INC DEL COM 46284V101 23,007 23,007 2,734 0.0398
2024-04-29 2024-03-31 13F IRON MTN INC DEL COM 46284V101 0 -140 -100.00 0 0.0000
2024-02-06 2023-12-31 13F IRON MTN INC DEL COM 46284V101 140 2 1.45 0 0.0022
2023-11-13 2023-09-30 13F IRON MTN INC DEL COM 46284V101 138 1 0.73 0 0.0019
2023-08-15 2023-06-30 13F IRON MTN INC DEL COM 46284V101 137 2 1.48 0 0.0019
2023-04-27 2023-03-31 13F IRON MTN INC DEL COM 46284V101 135 2 1.50 0 0.0017
2023-02-07 2022-12-31 13F IRON MTN INC DEL COM 46284V101 133 2 1.53 0 -100.00 0.0018
2022-10-28 2022-09-30 13F IRON MTN INC DEL COM 46284V101 131 1 0.77 6 0.00 0.0018
2022-08-12 2022-06-30 13F IRON MTN INC COM 46284V101 130 2 1.56 6 -14.29 0.0018
2022-05-04 2022-03-31 13F IRON MTN INC COM 46284V101 128 1 0.79 7 0.00 0.0020
2022-02-07 2021-12-31 13F IRON MTN INC COM 46284V101 127 2 1.60 7 40.00 0.0023
2021-11-02 2021-09-30 13F IRON MTN INC COM 46284V101 125 2 1.63 5 0.00 0.0030
2021-08-11 2021-06-30 13F IRON MTN INC COM 46284V101 123 2 1.65 5 25.00 0.0034
2021-05-14 2021-03-31 13F IRON MTN INC COM 46284V101 121 2 1.68 4 0.00 0.0030
2021-02-16 2020-12-31 13F IRON MTN INC COM 46284V101 119 3 2.59 4 33.33 0.0031
2020-11-16 2020-09-30 13F IRON MTN INC COM 46284V101 116 3 2.65 3 0.00 0.0025
2020-08-14 2020-06-30 13F IRON MTN INC COM 46284V101 113 3 2.73 3 0.00 0.0025
2020-05-07 2020-03-31 13F IRON MTN INC COM 46284V101 110 2 1.85 3 0.00 0.0031
2020-02-06 2019-12-31 13F IRON MTN INC COM 46284V101 108 2 1.89 3 0.00 0.0061
2019-11-05 2019-09-30 13F IRON MTN INC COM 46284V101 106 2 1.92 3 0.00 0.0065
2019-08-08 2019-06-30 13F IRON MTN INC COM 46284V101 104 104 3 0.0073
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.