Iron Mountain Incorporated
MX ˙ BMV ˙ US46284V1017
SecurityMX:IRM1 / Iron Mountain Incorporated
InstitutionPnc Financial Services Group, Inc.
Latest Disclosed Ownership68,569 shares
Latest Disclosed Value $ 7,003,638
Pnc Financial Services Group, Inc. reports 12.05% increase in ownership of IRM1 / Iron Mountain Incorporated

On May 8, 2026 - Pnc Financial Services Group, Inc. filed a 13F-HR form disclosing ownership of 68,569 shares of Iron Mountain Incorporated (MX:IRM1) valued at $7,003,638 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 6, 2026 disclosing 61,194 shares of Iron Mountain Incorporated. This represents a change in shares of 12.05% during the quarter.

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)
2026-05-08 2026-03-31 13F IRON MTN INC DEL COM 46284V101 68,569 7,375 12.05 7,004 37.96 0.0040
2026-02-06 2025-12-31 13F IRON MTN INC DEL COM 46284V101 61,194 -3,860 -5.93 5,076 -23.45 0.0028
2025-11-07 2025-09-30 13F IRON MTN INC DEL COM 46284V101 65,054 -332 -0.51 6,632 -1.12 0.0040
2025-08-08 2025-06-30 13F IRON MTN INC DEL COM 46284V101 65,386 6,937 11.87 6,707 33.37 0.0043
2025-05-09 2025-03-31 13F IRON MTN INC DEL COM 46284V101 58,449 1,255 2.19 5,029 -16.35 0.0026
2025-02-07 2024-12-31 13F IRON MTN INC DEL COM 46284V101 57,194 3,317 6.16 6,012 -6.11 0.0040
2024-11-08 2024-09-30 13F IRON MTN INC DEL COM 46284V101 53,877 1,446 2.76 6,402 36.27 0.0041
2024-08-09 2024-06-30 13F IRON MTN INC DEL COM 46284V101 52,431 1,076 2.10 4,699 14.06 0.0031
2024-05-10 2024-03-31 13F IRON MTN INC DEL COM 46284V101 51,355 2,359 4.81 4,119 20.16 0.0029
2024-03-22 2023-12-31 13F/A-1 IRON MTN INC DEL COM 46284V101 48,996 748 1.55 3,429 19.53 0.0027
2024-02-09 2023-12-31 13F IRON MTN INC DEL COM 46284V101 48,996 748 3,429 0.0027
2023-11-13 2023-09-30 13F IRON MTN INC DEL COM 46284V101 48,248 557 1.17 2,868 5.87 0.0025
2023-08-11 2023-06-30 13F IRON MTN INC DEL COM 46284V101 47,691 3,989 9.13 2,710 17.17 0.0023
2023-05-15 2023-03-31 13F IRON MTN INC DEL COM 46284V101 43,702 44 0.10 2,312 6.25 0.0020
2023-02-10 2022-12-31 13F IRON MTN INC DEL COM 46284V101 43,658 -2,105 -4.60 2,176 8.10 0.0021
2022-11-10 2022-09-30 13F IRON MTN INC DEL COM 46284V101 45,763 -8,124 -15.08 2,013 -23.29 0.0021
2022-08-12 2022-06-30 13F IRON MTN INC COM 46284V101 53,887 1,924 3.70 2,624 -8.86 0.0026
2022-05-12 2022-03-31 13F IRON MTN INC COM 46284V101 51,963 -3,984 -7.12 2,879 -1.71 0.0025
2022-02-11 2021-12-31 13F IRON MTN INC COM 46284V101 55,947 -50,923 -47.65 2,929 -36.93 0.0024
2021-11-05 2021-09-30 13F IRON MTN INC COM 46284V101 106,870 6,478 6.45 4,644 9.30 0.0043
2021-08-06 2021-06-30 13F IRON MTN INC COM 46284V101 100,392 2,251 2.29 4,249 16.99 0.0039
2021-05-07 2021-03-31 13F IRON MTN INC COM 46284V101 98,141 5,075 5.45 3,632 32.36 0.0035
2021-02-12 2020-12-31 13F IRON MTN INC COM 46284V101 93,066 214 0.23 2,744 10.33 0.0028
2020-11-06 2020-09-30 13F IRON MTN INC COM 46284V101 92,852 57,238 160.72 2,487 167.71 0.0031
2020-08-28 2020-06-30 13F/A-1 IRON MTN INC COM 46284V101 35,614 5,207 17.12 929 28.31 0.0012
2020-08-07 2020-06-30 13F IRON MTN INC COM 46284V101 35,614 5,207 929 192.8961
2020-05-08 2020-03-31 13F IRON MTN INC COM 46284V101 30,407 2,730 9.86 724 -17.91 0.0009
2020-02-07 2019-12-31 13F IRON MTN INC COM 46284V101 27,677 8,833 46.87 882 44.83 0.0009
2019-11-08 2019-09-30 13F IRON MTN INC COM 46284V101 18,844 -72,119 -79.28 609 -78.62 0.0006
2019-08-09 2019-06-30 13F IRON MTN INC COM 46284V101 90,963 25,039 37.98 2,848 21.87 0.0028
2019-05-10 2019-03-31 13F IRON MTN INC COM 46284V101 65,924 9,480 16.80 2,337 27.84 0.0023
2019-02-08 2018-12-31 13F IRON MTN INC COM 46284V101 56,444 7,228 14.69 1,828 7.59 0.0020
2018-11-09 2018-09-30 13F IRON MTN INC COM 46284V101 49,216 -2,163 -4.21 1,699 -5.51 0.0016
2018-08-10 2018-06-30 13F IRON MTN INC COM 46284V101 51,379 -312 -0.60 1,798 5.89 0.0018
2018-05-11 2018-03-31 13F IRON MTN INC COM 46284V101 51,691 -1,903 -3.55 1,698 -16.02 0.0017
2018-02-09 2017-12-31 13F IRON MTN INC COM 46284V101 53,594 735 1.39 2,022 -1.70 0.0020
2017-11-13 2017-09-30 13F IRON MTN INC COM 46284V101 52,859 2,390 4.74 2,057 18.63 0.0021
2017-08-11 2017-06-30 13F IRON MTN INC COM 46284V101 50,469 12,818 34.04 1,734 29.11 0.0019
2017-05-12 2017-03-31 13F IRON MTN INC COM 46284V101 37,651 2,396 6.80 1,343 17.19 0.0015
2017-02-10 2016-12-31 13F IRON MTN INC COM 46284V101 35,255 -2,586 -6.83 1,146 -19.35 0.0013
2016-11-04 2016-09-30 13F IRON MTN INC COM 46284V101 37,841 -1,586 -4.02 1,421 -9.49 0.0017
2016-08-05 2016-06-30 13F IRON MTN INC COM 46284V101 39,427 23,073 141.08 1,570 183.39 0.0018
2016-05-06 2016-03-31 13F IRON MTN INC COM 46284V101 16,354 -989 -5.70 554 18.38 0.0006
2016-02-05 2015-12-31 13F IRON MTN INC COM 46284V101 17,343 260 1.52 468 -11.70 0.0006
2015-11-06 2015-09-30 13F IRON MTN INC COM 46284V101 17,083 4,170 32.29 530 32.50 0.0006
2015-08-05 2015-06-30 13F IRON MTN INC COM 46284V101 12,913 -4,503 -25.86 400 -37.11 0.0004
2015-05-08 2015-03-31 13F IRON MTN INC COM 46284V101 17,416 207 1.20 636 -4.50 0.0007
2015-02-06 2014-12-31 13F/A-1 IRON MTN COM 462846106 17,209 5,194 43.23 666 69.90 0.0007
2015-02-06 2014-12-31 13F IRON MTN COM 462846106 17,209 666
2014-11-07 2014-09-30 13F IRON MTN COM 462846106 12,015 -1,030 -7.90 392 -15.33 0.0005
2014-08-08 2014-06-30 13F IRON MTN COM 462846106 13,045 -3,500 -21.15 463 1.76 0.0006
2014-05-09 2014-03-31 13F IRON MTN COM 462846106 16,545 -1,784 -9.73 455 -18.31 0.0006
2014-02-07 2013-12-31 13F IRON MTN COM 462846106 18,329 -12,372 -40.30 557 -32.81 0.0007
2013-11-01 2013-09-30 13F IRON MTN COM 462846106 30,701 -5,403 -14.97 829 -13.56 0.0012
2013-08-02 2013-06-30 13F IRON MTN COM 462846106 36,104 36,104 959 0.0014
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.