Free · no sign-up · Q2 2026

Which funds own IRDM

Iridium Communications Inc in the Q2 2026 filings. At least 2 of the 91 current managers on file reported a position, worth $74m 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: 2; at least, of 91 current
Combined value: $74m; as reported
Opened: 0; new this quarter
Added to: 0; already held
Trimmed or sold out: 1; 0 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
ARK Investment Management LLC Long-only · $15.4bn book	$67m	0.4%	1,215,113	+$19m-511,689	Trimmed
PDT Partners LLC Quantitative · $1.9bn book	$7.6m	0.4%	138,207	+$3.7m0	Held

Ownership through time

At least 8 of the 95 managers whose filings are on file listed IRDM in Q2 2026, against 2 in Q2 2013. 4 managers more than in Q1 2026: 2 started positions; 3 listed it again; 1 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

Quantbot Technologies LP$1.9m
Moore Capital Management LP$1.6m

Largest increases, by shares

Quantbot Technologies LPnew: 34,169 shares+$1.9m
Moore Capital Management LPnew: 30,000 shares+$1.6m

Largest decreases, by shares

Man Group PLC1,907,044 to 416,442 shares-$82m
ARK Investment Management LLC1,726,802 to 1,215,113 shares-$28m

Left it

No manager on file is shown leaving it.

Manager	First listed	Largest	Q2 2026
AQR Capital Management LLC	Q3 2024	$374m	$374m
ARK Investment Management LLC	Q3 2019	$544m	$67m
Balyasny Asset Management LLC	Q2 2026	$53m	$53m
Renaissance Technologies LLC	Q4 2018	$76m	$33m
Man Group PLC	Q1 2021	$53m	$23m
PDT Partners LLC	Q4 2014	$7.6m	$7.6m
Quantbot Technologies LP	Q3 2023	$2.7m	$1.9m
Moore Capital Management LP	Q2 2026	$1.6m	$1.6m
Capital World Investors	Q2 2013	$152m	last listed Q2 2024
Millennium Management LLC	Q2 2023	$75m	last listed Q2 2023
D. E. Shaw & Co.	Q2 2023	$54m	last listed Q1 2024
Arrowstreet Capital LP	Q2 2023	$24m	last listed Q3 2024
GAMCO Investors Inc	Q1 2017	$23m	last listed Q4 2022
Voloridge Investment Management LLC	Q1 2019	$21m	last listed Q4 2025
Acadian Asset Management LLC	Q2 2025	$9.1m	last listed Q2 2025
Bridgewater Associates LP	Q1 2025	$7.3m	last listed Q4 2025
Tudor Investment Corp	Q2 2013	$7.2m	last listed Q3 2023
Winton Group Ltd	Q4 2022	$4.7m	last listed Q4 2024

What IRDM 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 IRDM →

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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