Iron Mountain Incorporated
US ˙ NYSE ˙ US46284V1017

SecurityIRM / Iron Mountain Incorporated
InstitutionSilvant Capital Management LLC
Latest Disclosed Ownership1,292 shares
Latest Disclosed Value $ 131,965
Silvant Capital Management LLC ownership in IRM / Iron Mountain Incorporated

On May 14, 2026 - Silvant Capital Management LLC filed a 13F-HR form disclosing ownership of 1,292 shares of Iron Mountain Incorporated (US:IRM) valued at $131,965 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 1,292 shares of Iron Mountain Incorporated. This represents a change in shares of 0.00% during the quarter. The current value of the position is $165,311 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 1,292 0 0.00 132 22.43 0.0026
2026-02-13 2025-12-31 13F IRON MTN INC DEL COM 46284V101 1,292 0 0.00 107 -18.32 0.0036
2025-11-18 2025-09-30 13F/A-1 IRON MTN INC DEL COM 46284V101 1,292 0 0.00 132 -0.76 0.0046
2025-11-13 2025-09-30 13F IRON MTN INC DEL COM 46284V101 1,292 0 132 0.0026
2025-08-13 2025-06-30 13F IRON MTN INC DEL COM 46284V101 1,292 0 0.00 133 18.92 0.0050
2025-05-14 2025-03-31 13F IRON MTN INC DEL COM 46284V101 1,292 0 0.00 111 -17.78 0.0051
2025-02-13 2024-12-31 13F IRON MTN INC DEL COM 46284V101 1,292 0 0.00 136 -12.34 0.0056
2024-10-29 2024-09-30 13F IRON MTN INC DEL COM 46284V101 1,292 0 0.00 154 32.76 0.0068
2024-07-25 2024-06-30 13F IRON MTN INC DEL COM 46284V101 1,292 0 0.00 117 11.54 0.0052
2024-04-30 2024-03-31 13F IRON MTN INC DEL COM 46284V101 1,292 0 0.00 104 14.29 0.0050
2024-01-25 2023-12-31 13F IRON MTN INC DEL COM 46284V101 1,292 0 0.00 91 18.18 0.0049
2023-10-24 2023-09-30 13F IRON MTN INC DEL COM 46284V101 1,292 0 0.00 78 4.05 0.0047
2023-07-25 2023-06-30 13F IRON MTN INC DEL COM 46284V101 1,292 0 0.00 74 7.25 0.0042
2023-04-26 2023-03-31 13F IRON MTN INC DEL COM 46284V101 1,292 0 0.00 69 6.15 0.0045
2023-01-23 2022-12-31 13F IRON MTN INC DEL COM 46284V101 1,292 0 0.00 65 12.07 0.0046
2022-11-09 2022-09-30 13F IRON MTN INC DEL COM 46284V101 1,292 0 0.00 58 -9.37 0.0039
2022-08-03 2022-06-30 13F IRON MTN INC COM 46284V101 1,292 0 0.00 64 -11.11 0.0155
2022-05-05 2022-03-31 13F IRON MTN INC COM 46284V101 1,292 740 134.06 72 148.28 0.0137
2022-02-07 2021-12-31 13F IRON MTN INC COM 46284V101 552 0 0.00 29 20.83 0.0050
2021-11-08 2021-09-30 13F IRON MTN INC COM 46284V101 552 0 0.00 24 0.00 0.0043
2021-08-03 2021-06-30 13F IRON MTN INC COM 46284V101 552 0 0.00 24 14.29 0.0038
2021-05-11 2021-03-31 13F IRON MTN INC COM 46284V101 552 0 0.00 21 23.53 0.0036
2021-02-05 2020-12-31 13F IRON MTN INC COM 46284V101 552 0 0.00 17 13.33 0.0029
2020-11-09 2020-09-30 13F IRON MTN INC COM 46284V101 552 0 0.00 15 0.00 0.0028
2020-08-11 2020-06-30 13F IRON MTN INC COM 46284V101 552 0 0.00 15 15.38 0.0027
2020-05-13 2020-03-31 13F IRON MTN INC COM 46284V101 552 0 0.00 13 -27.78 0.0028
2020-02-10 2019-12-31 13F IRON MTN INC COM 46284V101 552 0 0.00 18 0.00 0.0033
2019-11-12 2019-09-30 13F IRON MTN INC COM 46284V101 552 -121 -17.98 18 -14.29 0.0036
2019-08-09 2019-06-30 13F IRON MTN INC COM 46284V101 673 0 0.00 21 -12.50 0.0038
2019-05-10 2019-03-31 13F IRON MTN INC COM 46284V101 673 0 0.00 24 9.09 0.0043
2019-02-06 2018-12-31 13F IRON MTN INC COM 46284V101 673 0 0.00 22 -8.33 0.0044
2018-11-07 2018-09-30 13F IRON MTN INC COM 46284V101 673 0 0.00 24 0.00 0.0030
2018-08-13 2018-06-30 13F IRON MTN INC COM 46284V101 673 0 0.00 24 4.35 0.0030
2018-05-09 2018-03-31 13F IRON MTN INC COM 46284V101 673 673 23 0.0030
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.