Iron Mountain Incorporated
US ˙ NYSE ˙ US46284V1017

SecurityIRM / Iron Mountain Incorporated
InstitutionAxa S.a.
Latest Disclosed Ownership0 shares
Latest Disclosed Value $ 0
Axa S.a. closes position in IRM / Iron Mountain Incorporated

On November 14, 2025 - Axa S.a. filed a 13F-HR form disclosing ownership of 0 shares of Iron Mountain Incorporated (US:IRM) valued at $0 USD as of September 30, 2025. The entity filed a previous 13F-HR on August 14, 2025 disclosing 101,843 shares of Iron Mountain Incorporated. The current value of the position is $0 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)
2025-11-14 2025-09-30 13F IRON MTN INC DEL COM 46284V101 0 -100.00 0
2025-08-14 2025-06-30 13F IRON MTN INC DEL COM 46284V101 101,843 75,393 285.04 10,446 359.16 0.0300
2025-05-15 2025-03-31 13F IRON MTN INC DEL COM 46284V101 26,450 22,610 588.80 2,276 464.52 0.0075
2025-02-14 2024-12-31 13F IRON MTN INC DEL COM 46284V101 3,840 3,840 404 0.0012
2024-11-14 2024-09-30 13F IRON MTN INC DEL COM 46284V101 0 -17,167 -100.00 0 -100.00
2025-02-25 2024-06-30 13F/A-1 IRON MTN INC DEL COM 46284V101 17,167 -71,882 -80.72 1,539 -78.47 0.0046
2024-08-14 2024-06-30 13F IRON MTN INC DEL COM 46284V101 17,167 -71,882 1,539 0.0046
2024-05-15 2024-03-31 13F IRON MTN INC DEL COM 46284V101 89,049 368 0.41 7,143 15.10 0.0214
2024-07-16 2023-12-31 13F/A-1 IRON MTN INC DEL COM 46284V101 88,681 5,032 6.02 6,206 24.80 0.0200
2024-02-14 2023-12-31 13F IRON MTN INC DEL COM 46284V101 88,681 5,032 6,206 0.0122
2023-11-14 2023-09-30 13F IRON MTN INC DEL COM 46284V101 83,649 30,024 55.99 4,973 63.23 0.0175
2023-08-14 2023-06-30 13F IRON MTN INC DEL COM 46284V101 53,625 -40,000 -42.72 3,047 -38.50 0.0101
2023-05-15 2023-03-31 13F IRON MTN INC DEL COM 46284V101 93,625 -198,283 -67.93 4,954 -65.96 0.0170
2023-02-14 2022-12-31 13F IRON MTN INC DEL COM 46284V101 291,908 -15,174 -4.94 14,552 7.77 0.0525
2023-02-14 2022-09-30 13F/A-1 Iron Mountain COM 46284V101 307,082 65,625 27.18 13,502 14.85 0.0531
2022-11-14 2022-09-30 13F Iron Mountain COM 46284V101 307,082 65,625 13,502 0.0531
2023-02-14 2022-06-30 13F/A-1 Iron Mountain COM 46284V101 241,457 -172,643 -41.69 11,757 -48.76 0.0436
2022-08-15 2022-06-30 13F Iron Mountain COM 46284V101 241,457 -172,643 11,757 0.0436
2023-02-14 2022-03-31 13F/A-1 Iron Mountain COM 46284V101 414,100 -33,500 -7.48 22,945 -2.04 0.0652
2022-05-13 2022-03-31 13F Iron Mountain COM 46284V101 414,100 -33,500 22,946 0.0652
2022-02-14 2021-12-31 13F Iron Mountain COM 46284V101 447,600 -104,200 -18.88 23,423 -2.31 0.0599
2021-11-15 2021-09-30 13F Iron Mountain COM 46284V101 551,800 43,400 8.54 23,976 11.43 0.0673
2021-08-13 2021-06-30 13F/A-1 Iron Mountain COM 46284V101 508,400 -126,500 -19.92 21,516 -8.43 0.0607
2021-08-13 2021-06-30 13F Iron Mountain COM 46284V101 508,400 -126,500 21,516 0.0363
2021-05-14 2021-03-31 13F Iron Mountain COM 46284V101 634,900 -99,800 -13.58 23,498 8.49 0.0716
2021-02-12 2020-12-31 13F Iron Mountain COM 46284V101 734,700 99,600 15.68 21,659 27.30 0.0680
2021-02-11 2020-09-30 13F/A-1 Iron Mountain COM 46284V101 635,100 -6,300 -0.98 17,014 1.63 0.0615
2020-11-13 2020-09-30 13F Iron Mountain COM 46284V101 635,100 -6,300 17,014 33,962.6443
2021-02-12 2020-06-30 13F/A-1 IRON MTN INC COM 46284V101 641,400 12,033 1.91 16,741 11.76 0.0660
2020-08-14 2020-06-30 13F IRON MTN INC COM 46284V101 641,400 12,033 16,741 66,020.5765
2021-02-12 2020-03-31 13F/A-2 IRON MTN INC COM 46284V101 629,367 34,567 5.81 14,979 -20.98 0.0749
2020-06-15 2020-03-31 13F/A-1 IRON MTN INC COM 46284V101 629,367 0 14,979 0.0749
2020-05-15 2020-03-31 13F IRON MTN INC COM 46284V101 629,367 34,567 14,979 41,656.8566
2021-02-12 2019-12-31 13F/A-1 IRON MTN INC COM 46284V101 594,800 31,200 5.54 18,956 3.84 0.0771
2020-02-18 2019-12-31 13F IRON MTN INC COM 46284V101 594,800 31,200 18,956 77,182.3507
2021-02-12 2019-09-30 13F/A-1 IRON MTN INC COM 46284V101 563,600 61,100 12.16 18,255 16.07 0.0726
2019-11-14 2019-09-30 13F IRON MTN INC COM 46284V101 563,600 61,100 18,255 72,747.3372
2021-02-12 2019-06-30 13F/A-1 IRON MTN INC COM 46284V101 502,500 -162,600 -24.45 15,727 -33.32 0.0614
2019-08-13 2019-06-30 13F IRON MTN INC COM 46284V101 502,500 -162,600 15,727 61,674.6791
2019-05-14 2019-03-31 13F IRON MTN INC COM 46284V101 665,100 174,936 35.69 23,585 48.46 0.0922
2019-02-13 2018-12-31 13F IRON MTN INC COM 46284V101 490,164 125,100 34.27 15,886 26.06 0.0692
2018-11-08 2018-09-30 13F IRON MTN INC COM 46284V101 365,064 346,400 1,855.98 12,602 1,829.86 0.0462
2018-08-13 2018-06-30 13F IRON MTN INC COM 46284V101 18,664 -7,103 -27.57 653 -22.81 0.0025
2018-05-14 2018-03-31 13F IRON MTN INC COM 46284V101 25,767 9,200 55.53 846 35.36 0.0034
2018-02-13 2017-12-31 13F IRON MTN INC COM 46284V101 16,567 0 0.00 625 -2.95 0.0025
2017-12-01 2017-09-30 13F/A-1 IRON MTN INC COM 46284V101 16,567 -448,818 -96.44 644 -95.97 0.0028
2017-11-13 2017-09-30 13F IRON MTN INC COM 46284V101 16,567 -448,818 644
2017-08-10 2017-06-30 13F IRON MTN INC COM 46284V101 465,385 332,544 250.33 15,991 237.43 0.0726
2017-05-11 2017-03-31 13F IRON MTN INC COM 46284V101 132,841 -311,459 -70.10 4,739 -67.16 0.0214
2017-02-13 2016-12-31 13F IRON MTN INC COM 46284V101 444,300 419,620 1,700.24 14,431 1,458.42 0.0677
2016-11-10 2016-09-30 13F IRON MTN INC COM 46284V101 24,680 24,680 0.00 926 0.0041
2016-08-11 2016-06-30 13F IRON MOUNTAIN COM 46284V101 0 -1,200 -100.00 0 -100.00
2016-05-13 2016-03-31 13F IRON MOUNTAIN COM 46284V101 1,200 0 0.00 41 28.13 0.0002
2016-02-12 2015-12-31 13F IRON MOUNTAIN COM 46284V101 1,200 1,200 0.00 32 0.0001
2015-11-13 2015-09-30 13F IRON MOUNTAIN COM 46284V101 0 -6,600 -100.00 0 -100.00
2015-08-13 2015-06-30 13F IRON MOUNTAIN COM 46284V101 6,600 6,600 205 0.0008
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.