Iron Mountain Incorporated
US ˙ NYSE ˙ US46284V1017

SecurityIRM / Iron Mountain Incorporated
InstitutionCaptrust Financial Advisors
Latest Disclosed Ownership211,691 shares
Latest Disclosed Value $ 21,614,907
Captrust Financial Advisors ownership in IRM / Iron Mountain Incorporated

On May 14, 2026 - Captrust Financial Advisors filed a 13F-HR form disclosing ownership of 211,691 shares of Iron Mountain Incorporated (US:IRM) valued at $21,622,119 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 255,142 shares of Iron Mountain Incorporated. This represents a change in shares of -17.03% during the quarter. The current value of the position is $27,564,285 USD.

Captrust Financial Advisors has a history of taking positions in derivatives of the underlying security (IRM) in the form of stock options.

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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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

IRM / Iron Mountain Incorporated Historical Put/Call Ratio
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 REIT 46284V101 211,691 -43,451 -17.03 21,615 2.13 0.0377
2026-02-17 2025-12-31 13F IRON MTN INC DEL COM REIT 46284V101 255,142 -513,124 -66.79 21,164 -72.98 0.0403
2025-11-19 2025-09-30 13F IRON MTN INC DEL COM REIT 46284V101 768,266 -915 -0.12 78,317 -0.73 0.1597
2025-08-15 2025-06-30 13F IRON MTN INC DEL COM REIT 46284V101 769,181 -34,442 -4.29 78,895 14.10 0.1760
2025-05-15 2025-03-31 13F IRON MTN INC DEL COM REIT 46284V101 803,623 7,306 0.92 69,144 -17.39 0.1735
2025-02-14 2024-12-31 13F IRON MTN INC DEL COM REIT 46284V101 796,317 -155,235 -16.31 83,701 -25.98 0.2391
2024-11-14 2024-09-30 13F IRON MTN INC DEL COM REIT 46284V101 951,552 47,327 5.23 113,073 39.53 0.3354
2024-08-15 2024-06-30 13F IRON MTN INC DEL COM REIT 46284V101 904,225 47,280 5.52 81,037 17.90 0.2608
2024-05-15 2024-03-31 13F IRON MTN INC DEL COM REIT 46284V101 856,945 31,876 3.86 68,736 19.05 0.2526
2024-02-14 2023-12-31 13F IRON MTN INC DEL COM REIT 46284V101 825,069 57,392 7.48 57,738 26.51 0.1988
2023-11-15 2023-09-30 13F IRON MTN INC DEL COM REIT 46284V101 767,677 483,757 170.38 45,638 182.90 0.1744
2023-08-15 2023-06-30 13F IRON MTN INC DEL COM REIT 46284V101 283,920 -2,049 -0.72 16,132 6.62 0.0636
2023-05-15 2023-03-31 13F IRON MTN INC DEL COM REIT 46284V101 285,969 11,158 4.06 15,131 10.45 0.0665
2023-02-15 2022-12-31 13F IRON MTN INC DEL COM REIT 46284V101 274,811 11,098 4.21 13,699 18.15 0.0689
2022-11-16 2022-09-30 13F IRON MTN INC DEL COM ETF 46284V101 263,713 25,059 10.50 11,595 -0.22 0.0675
2022-08-16 2022-06-30 13F IRON MTN INC DEL COM COM 46284V101 238,654 238,654 11,620 0.0843
2020-05-15 2020-03-31 13F IRON MTN INC COM 46284V101 0 -14,344 -100.00 0 -100.00
2020-02-14 2019-12-31 13F IRON MTN INC COM 46284V101 14,344 14,344 457 0.0072
Disclosed Put Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share Price Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2026-05-14 2026-03-31 13F IRON MTN INC DEL COM REIT Put 27,700 2,829 n/a n/a n/a
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.