Free · no sign-up · Q2 2026

Which funds own IRM

Iron MTN Inc Del in the Q2 2026 filings. At least 1 of the 91 current managers on file reported a position, worth $52m between them. It is among the largest positions of fewer than a fifth of the current managers on file. Buying and selling roughly cancelled this quarter, which is what a name looks like when the argument is still live.

Managers holding: 1; at least, of 91 current
Combined value: $52m; as reported
Opened: 1; new this quarter
Added to: 0; already held
Trimmed or sold out: 2; 2 sold out entirely

Only each manager’s largest 200 positions are listed here, so a smaller holder may be missing.

Managers reporting a position

Largest first. Weight is the share of that manager’s whole reported book, which is the number worth quoting: $400m is a rounding error in one book and a defining bet in another.

Manager	Value	Weight	Shares	Change on the quarter	Action
Voloridge Investment Management LLC Quantitative · $23.5bn book	$52m	0.2%	412,748	opened412,748	New

Sold out of this quarter

Valued at what the position was worth in the previous filing, because by this one it is gone.

Soros Fund Management LLC · Macro$32m held before
Hudson Bay Capital Management LP · Multi-strategy$20m held before

Ownership through time

At least 6 of the 95 managers whose filings are on file listed IRM in Q2 2026, against 4 in Q1 2015. 3 managers fewer than in Q1 2026: 1 started a position; 1 sold out, by its own filing; 3 no longer listed it among the positions read, which can mean a holding below the listed range, a filing that reported no holdings, or a filing not yet made.

Each manager’s largest 500 positions a quarter are read, so a small holding in a very large book can be missing, and a manager is counted as leaving only where its own filing shows it.

Managers on file listing it

Their combined reported value

Between the quarter ends of Q1 2026 and Q2 2026. Each change in shares is valued at the Q2 2026 price, so the price’s own move is left out; a 13F shows the two quarter ends, not when in between anything was bought or sold.

Started in Q2 2026

Voloridge Investment Management LLC$52m

Largest increases, by shares

Voloridge Investment Management LLCnew: 412,748 shares+$52m
Fidelity (FMR LLC)7,484,398 to 7,872,365 shares+$49m
AQR Capital Management LLC1,846,073 to 2,127,095 shares+$35m
Invesco Ltd3,921,521 to 4,065,649 shares+$18m
Acadian Asset Management LLC168,907 to 292,064 shares+$16m

Largest decreases, by shares

Capital World Investors1,867,169 to 1,217,169 shares-$82m

Left it

Hudson Bay Capital Management LPwas $19m

Manager	First listed	Largest	Q2 2026
Fidelity (FMR LLC)	Q1 2025	$994m	$994m
Invesco Ltd	Q2 2016	$516m	$514m
AQR Capital Management LLC	Q1 2026	$267m	$267m
Capital World Investors	Q1 2015	$1.7bn	$154m
Voloridge Investment Management LLC	Q2 2016	$67m	$52m
Acadian Asset Management LLC	Q4 2023	$67m	$37m
T. Rowe Price Associates Inc	Q1 2015	$501m	last listed Q1 2016
Wellington Management Group LLP	Q3 2023	$303m	last listed Q2 2025
Point72 Asset Management LP	Q4 2023	$179m	last listed Q1 2026
MFS Investment Management	Q1 2015	$113m	last listed Q2 2015
Janus Henderson Group Ltd	Q3 2015	$89m	last listed Q1 2022
Neuberger Berman Group LLC	Q3 2016	$78m	last listed Q4 2024
D. E. Shaw & Co.	Q1 2025	$70m	last listed Q1 2025
Winton Group Ltd	Q1 2015	$51m	last listed Q4 2020
Balyasny Asset Management LLC	Q2 2022	$48m	last listed Q2 2025
Schonfeld Strategic Advisors LLC	Q4 2017	$48m	last listed Q1 2026

What IRM is worth

Knowing who owns it is half the question. The other half is what it is worth against the companies it trades beside, which is the one an interviewer will follow up with.

Build the comp set around IRM →

How much of the picture this is

A Form 13F reports US-listed long equity and nothing else: no shorts, no bonds, no cash and no non-US listings. It arrives forty-five days after the quarter ends, so a manager who sold in July still shows the position in a filing published in August. This page reads the managers on file here rather than every filer in the market, and each manager’s largest positions rather than the whole table, so a small position in a very large book may not appear. Say “their last filing showed” rather than “they own”, and the distinction will do you credit.

What to do with a name the funds are buying

Knowing who owns something is the start of a pitch, not the pitch. The next questions are what it is worth and why they were buying.

Comps ExplorerValue it against the peers it trades beside Every managerRead any of these books in full Deal tapeWhat buyers paid for whole companies, not slices Hedge fund interviewsHow the room runs, and the stock pitch it wants

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The holdings, every quarter, and the week between

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