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IRDM in the 13F filings

Iridium Communications Inc · CUSIP 46269C102

Sector · Communications and media
Quarter
Q2 2026Q1 2026Q4 2025Q3 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024Q4 2023Q3 2023
Quarter end
31 Mar 2026
the date the book describes
Filed
27 Oct 2026
latest of these filings; the earliest 12 May 2026
Managers listing it
27
at least, of 95 tracked, among listed positions
Comparable managers
91
filed both Q4 2025 and Q1 2026; 5 listed it in both
Shares listed
12,089,369
combined, among listed positions
Reported value
$334m
combined, at the quarter end

AllianceBernstein LP. Values in this filing are at the previous quarter end's prices; its share count is the quarter end's.

Among the 91 comparable managers: 11 buyers (opened or added shares) and 20 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was -2,856,933.

Managers listing IRDM in Q1 2026

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q4 2025, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

27 of 27 holders

ActionFiling
AQR Capital Management LLC2,917,827$81munder 0.1%Added+2,438,71315 May 2026 (the filing on sec.gov)
Man Group PLC1,907,044$53m0.10%Added+55,51615 May 2026 (the filing on sec.gov)
ARK Investment Management LLC1,726,802$48m0.37%Trimmed-1,123,80412 May 2026 (the filing on sec.gov)
Arrowstreet Capital LP1,101,231$31munder 0.1%Trimmed-54,23614 May 2026 (the filing on sec.gov)
Invesco Ltd987,926$27munder 0.1%Trimmed-6,27912 May 2026 (the filing on sec.gov)
Fidelity (FMR LLC)540,053$15munder 0.1%Added+80,19215 May 2026 (the filing on sec.gov)
Millennium Management LLC494,662$14munder 0.1%Trimmed-542,61915 May 2026 (the filing on sec.gov)
Two Sigma Investments LP402,428$11munder 0.1%Trimmed-298,11615 May 2026 (the filing on sec.gov)
Janus Henderson Group Ltd306,684$8.5munder 0.1%Added+27,32518 May 2026 (the filing on sec.gov)
Susquehanna International Group LLP291,694$8.1munder 0.1%Added+119,93215 May 2026 (the filing on sec.gov)
Holocene Advisors LP149,354$4.1munder 0.1%Added+8,21915 May 2026 (the filing on sec.gov)
PDT Partners LLC138,207$3.8m0.23%Held015 May 2026 (the filing on sec.gov)
Renaissance Technologies LLC128,100$3.6munder 0.1%Newnew14 May 2026 (the filing on sec.gov)
Balyasny Asset Management LLC123,555$3.4munder 0.1%Trimmed-67,00315 May 2026 (the filing on sec.gov)
Point72 Asset Management LP106,833$3.0munder 0.1%Trimmed-141,62815 May 2026 (the filing on sec.gov)
Bridgewater Associates LP106,600$3.0munder 0.1%Trimmed-313,23815 May 2026 (the filing on sec.gov)
AllianceBernstein LP168,896$2.9munder 0.1%Trimmed-18315 May 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc95,799$2.7munder 0.1%Added+5,88915 May 2026 (the filing on sec.gov)
D. E. Shaw & Co.83,333$2.3munder 0.1%Added+17,91015 May 2026 (the filing on sec.gov)
Citadel Advisors LLC63,573$1.8munder 0.1%Trimmed-1,076,64215 May 2026 (the filing on sec.gov)
ExodusPoint Capital Management LP62,450$1.7munder 0.1%Trimmed-46,79414 May 2026 (the filing on sec.gov)
Walleye Capital LLC56,586$1.6munder 0.1%Added+47,94613 May 2026 (the filing on sec.gov)
Neuberger Berman Group LLC28,594$793kunder 0.1%Added+4,03727 Oct 2026 (the filing on sec.gov)
Winton Group Ltd27,400$760kunder 0.1%Trimmed-13,90012 May 2026 (the filing on sec.gov)
Marshall Wace LLP24,896$691kunder 0.1%Trimmed-123,94015 May 2026 (the filing on sec.gov)
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Largest increases and reductions, by shares

Q4 2025 to Q1 2026, 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 (1)

Exited (5)

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.
7 in Q3 2024 to 8 in Q2 2026

Tracked managers listing it, at least.

024682014201620182020202220242026
the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.
IRDM by quarter
QuarterHoldersReported valueBuyersSellers
Q2 20132$41mn.a.n.a.
Q3 20132$33mn.a.n.a.
Q4 20132$14mn.a.n.a.
Q1 20141$15mn.a.n.a.
Q2 20141$39mn.a.n.a.
Q3 20141$43mn.a.n.a.
Q4 20142$49mn.a.n.a.
Q1 20151$47mn.a.n.a.
Q2 20151$44mn.a.n.a.
Q3 20152$30mn.a.n.a.
Q4 20151$41mn.a.n.a.
Q1 20161$40mn.a.n.a.
Q2 20161$45mn.a.n.a.
Q3 20161$49mn.a.n.a.
Q4 20161$67mn.a.n.a.
Q1 20172$75mn.a.n.a.
Q2 20172$87mn.a.n.a.
Q3 20172$81mn.a.n.a.
Q4 20172$93mn.a.n.a.
Q1 20182$89mn.a.n.a.
Q2 20182$144mn.a.n.a.
Q3 20182$115mn.a.n.a.
Q4 20183$141mn.a.n.a.
Q1 20194$212mn.a.n.a.
Q2 20193$154mn.a.n.a.
Q3 20193$89mn.a.n.a.
Q4 20193$114mn.a.n.a.
Q1 20204$138mn.a.n.a.
Q2 20204$201mn.a.n.a.
Q3 20203$228mn.a.n.a.
Q4 20203$450mn.a.n.a.
Q1 20215$524mn.a.n.a.
Q2 20213$621mn.a.n.a.
Q3 20214$555mn.a.n.a.
Q4 20214$511mn.a.n.a.
Q1 20225$199mn.a.n.a.
Q2 20226$186mn.a.n.a.
Q3 20227$200mn.a.n.a.
Q4 20228$216mn.a.n.a.
Q1 20236$257mn.a.n.a.
Q2 20237$356mn.a.n.a.
Q3 20238$228mn.a.n.a.
Q4 20235$169m40
Q1 20248$170m71
Q2 20242$94m02
Q3 20247$144m62
Q4 20243$81m30
Q1 20253$140m30
Q2 20252$170m20
Q3 20253$150m31
Q4 20256$108m1916
Q1 20264$109m1120
Q2 20268$561m1718

Compare with…

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

IRDM and NFLX →IRDM and TMUS →IRDM and CMCSA →Choose a stock to compare with IRDM →

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 IRDM, latest filings →Back to the 13F Explorer →