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IRM in the 13F filings

Iron MTN Inc Del · CUSIP 46284V101

Sector · Real estateTheme · Real estate investment trusts
Quarter
Q2 2026Q1 2026Q4 2025Q3 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024Q4 2023Q3 2023
Quarter end
31 Dec 2023
the date the book describes
Filed
14 Nov 2024
latest of these filings; the earliest 12 Feb 2024
Managers listing it
9
at least, of 95 tracked, among listed positions
Comparable managers
93
filed both Q3 2023 and Q4 2023; 6 listed it in both
Shares listed
12,744,574
combined, among listed positions
Reported value
$892m
combined, at the quarter end

Among the 93 comparable managers: 6 buyers (opened or added shares) and 3 sellers (trimmed or exited), at least, among listed positions. Their net change in shares is not known from listed positions, because at least one of them lists it in only one of the two quarters.

Managers listing IRM in Q4 2023

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q3 2023, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

9 of 9 holders

ActionFiling
Capital World Investors4,117,079$288m0.05%Trimmed-14,718,74513 Feb 2024 (the filing on sec.gov)
Invesco Ltd3,420,229$239m0.06%Added+176,79413 Feb 2024 (the filing on sec.gov)
Wellington Management Group LLP2,928,630$205munder 0.1%Trimmed-83,63012 Feb 2024 (the filing on sec.gov)
Point72 Asset Management LP639,050$45m0.11%Newnew14 Feb 2024 (the filing on sec.gov)
Neuberger Berman Group LLC638,028$45munder 0.1%Trimmed-72,85714 Nov 2024 (the filing on sec.gov)
Voloridge Investment Management LLC621,230$43m0.17%Added+261,30614 Feb 2024 (the filing on sec.gov)
Schonfeld Strategic Advisors LLC235,618$16m0.11%Added+107,09914 Feb 2024 (the filing on sec.gov)
Acadian Asset Management LLC130,998$9.2munder 0.1%Addedn.a.13 Feb 2024 (the filing on sec.gov)
Maverick Capital Ltd13,712$960kunder 0.1%Newnew14 Feb 2024 (the filing on sec.gov)

Largest increases and reductions, by shares

Q3 2023 to Q4 2023, among managers that listed it in both quarters or opened it.

Increases

Reductions

New positions and exits

At least these many: a manager is shown exiting only where its own filing shows the position gone.

New (2)

Exited (0)

No exit shown by a manager’s own filing.

Ownership over time

Every quarter on file. A quarter-end value moves with the price as well as with the shares held; buyers and sellers count comparable managers, by shares.
6 in Q3 2024 to 6 in Q2 2026

Tracked managers listing it, at least.

051015201620182020202220242026
the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.
IRM by quarter
QuarterHoldersReported valueBuyersSellers
Q1 20154$1.2bnn.a.n.a.
Q2 20156$1.1bnn.a.n.a.
Q3 20154$1.3bnn.a.n.a.
Q4 20156$1.1bnn.a.n.a.
Q1 20164$1.4bnn.a.n.a.
Q2 20166$1.2bnn.a.n.a.
Q3 20164$1.1bnn.a.n.a.
Q4 20162$885mn.a.n.a.
Q1 20175$1.4bnn.a.n.a.
Q2 20175$1.3bnn.a.n.a.
Q3 20176$1.5bnn.a.n.a.
Q4 20176$1.3bnn.a.n.a.
Q1 20186$1.2bnn.a.n.a.
Q2 20183$1.3bnn.a.n.a.
Q3 20186$1.3bnn.a.n.a.
Q4 20184$1.3bnn.a.n.a.
Q1 201912$1.6bnn.a.n.a.
Q2 20196$1.3bnn.a.n.a.
Q3 20198$1.4bnn.a.n.a.
Q4 20195$1.2bnn.a.n.a.
Q1 20207$975mn.a.n.a.
Q2 20202$920mn.a.n.a.
Q3 20203$951mn.a.n.a.
Q4 20203$865mn.a.n.a.
Q1 20212$1.2bnn.a.n.a.
Q2 20212$1.4bnn.a.n.a.
Q3 20212$1.4bnn.a.n.a.
Q4 20213$2.0bnn.a.n.a.
Q1 20222$1.7bnn.a.n.a.
Q2 20223$1.4bnn.a.n.a.
Q3 20225$1.3bnn.a.n.a.
Q4 20225$1.6bnn.a.n.a.
Q1 20233$1.4bnn.a.n.a.
Q2 20234$1.2bnn.a.n.a.
Q3 20237$1.6bnn.a.n.a.
Q4 20239$892m63
Q1 202410$758m55
Q2 20246$811m35
Q3 20246$956m33
Q4 202410$856m63
Q1 202511$1.1bn65
Q2 202511$1.8bn55
Q3 20256$1.7bn41
Q4 20256$1.3bn1610
Q1 20269$1.7bn1614
Q2 20266$2.0bn1317

Compare with…

Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.

IRM and WELL →IRM and EQIX →IRM and PLD →Choose a stock to compare with IRM →

How much of the picture this is

A 13F is a manager’s long US-listed equity book at a quarter end, filed up to 45 days later. It shows no shorts, cash, bonds or performance, and it is never today’s portfolio. Large books are listed to their largest positions, so a manager missing from this table may still hold a small position below that line. These are 95 tracked managers, not the institutional market.

Which funds own IRM, latest filings →Back to the 13F Explorer →