Ticker · CUSIP 46269C102

IRDM

IRIDIUM COMMUNICATIONS INC

Communication Services·Telecom Services

···Share

Holders (tracked)

Combined shares

8,160,638

Combined value

$141.81M

Last close

$41.85

Quarter

2025Q4

Price is +140.8% vs the avg quarter-end implied price across tracked holders.

Price · 1Y$41.85+18.72 (+80.95%)H $43.41 · L $15.62 · Avg Vol 2.2M

Tracked holders · last 8 quarters

+2 vs previous quarter over the last 8.

SEC event timeline

23 events

AQR Capital Management added2026-02-17
+351,059 shares · 2025Q4
Position
Ken Griffin (Citadel Advisors) trimmed2026-02-17
−509,628 shares · 2025Q4
Position
D.E. Shaw & Co. added2026-02-17
+13,561 shares · 2025Q4
Position
Two Sigma Investments trimmed2026-02-17
−39,046 shares · 2025Q4
Position
T. Rowe Price trimmed2026-02-17
−15,316 shares · 2025Q4
Position
Ron Baron (Baron Capital / BAMCO) trimmed2026-02-17
−482,926 shares · 2025Q4
Position
Izzy Englander (Millennium Mgmt) trimmed2026-02-17
−2,002,450 shares · 2025Q4
Position
Steve Cohen (Point72) opened position2026-02-17
+248,461 shares · 2025Q4
Position
Paul Tudor Jones (Tudor Investment) opened position2026-02-17
+666,046 shares · 2025Q4
Position
Ray Dalio (Bridgewater Associates) added2026-02-13
+303,112 shares · 2025Q4
Position
Cathie Wood (ARK Invest) trimmed2026-02-11
−3,639,502 shares · 2025Q4
Position
AQR Capital Management trimmed2025-11-14
−78,468 shares · 2025Q3
Position
Izzy Englander (Millennium Mgmt) added2025-11-14
+2,208,857 shares · 2025Q3
Position
Steve Cohen (Point72) exited2025-11-14
−136,311 shares · 2025Q3
Position
Two Sigma Investments added2025-11-14
+567,971 shares · 2025Q3
Position
D.E. Shaw & Co. added2025-11-14
+15,849 shares · 2025Q3
Position
T. Rowe Price trimmed2025-11-14
−1,863,323 shares · 2025Q3
Position
Ron Baron (Baron Capital / BAMCO) trimmed2025-11-14
−7,694,981 shares · 2025Q3
Position
Ray Dalio (Bridgewater Associates) opened position2025-11-13
+116,726 shares · 2025Q3
Position
Norges Bank (Norway SWF) exited2025-11-13
−540,176 shares · 2025Q3
Position
Mario Gabelli (GAMCO) exited2025-11-12
−8,600 shares · 2025Q3
Position
Norges Bank (Norway SWF) trimmed2025-11-12
−33,903 shares · 2024Q3
Position
Cathie Wood (ARK Invest) added2025-11-12
+1,156,580 shares · 2025Q3
Position

Insider activity

No insider transactions in the last 30 days.

View full insider history for IRDM →

Follow-the-investor returns

If you'd copied each holder of IRDM…

Cost basis inferred from each manager's quarter-over-quarter position changes. Sorted by % return on the position they're still holding.

Investor	First in	Cost basis	Return	Position value today
Ken Griffin (Citadel Advisors)	2016Q1	$17.44	+140.0%	$2.1M
Ken Griffin (Citadel Advisors)	2016Q1	$17.44	+140.0%	$2.1M
Ken Griffin (Citadel Advisors)	2016Q1	$17.44	+140.0%	$2.1M
Ron Baron (Baron Capital / BAMCO)	2016Q1	$18.33	+128.3%	$8.4M
Paul Tudor Jones (Tudor Investment)	2016Q2	$18.59	+125.1%	$27.9M
Ray Dalio (Bridgewater Associates)	2025Q1	$19.32	+116.6%	$17.6M
Two Sigma Investments	2016Q4	$20.37	+105.4%	$29.3M
AQR Capital Management	2016Q1	$21.42	+95.4%	$20.1M
Izzy Englander (Millennium Mgmt)	2017Q1	$21.91	+91.0%	$43.4M
Steve Cohen (Point72)	2019Q2	$24.23	+72.7%	$10.4M
D.E. Shaw & Co.	2016Q1	$24.92	+67.9%	$2.7M
Cathie Wood (ARK Invest)	2019Q3	$29.27	+43.0%	$119.3M
T. Rowe Price	2018Q4	$36.20	+15.6%	$3.8M

Who moved on this name in 2025Q4

Position changes reported for the latest quarter, grouped by direction.

New positions2

Paul Tudor Jones (Tudor Investment)
+666,046
$11.6M
Steve Cohen (Point72)
+248,461
$4.3M

Added to3

AQR Capital Management
+351,059
$6.1M
Ray Dalio (Bridgewater Associates)
+303,112
$5.3M
D.E. Shaw & Co.
+13,561
$236K

Trimmed6

Cathie Wood (ARK Invest)
−3,639,502
$63.3M
Izzy Englander (Millennium Mgmt)
−2,002,450
$34.8M
Ken Griffin (Citadel Advisors)
−509,628
$8.9M
Ron Baron (Baron Capital / BAMCO)
−482,926
$8.4M
Two Sigma Investments
−39,046
$679K
T. Rowe Price
−15,316
$266

Exited0

—

Institutional ownership over time

Distinct super-investors holding this ticker · combined dollar value, by quarter.

Quarter	Holders	Shares	Combined value	Δ holders
2022Q1	14	38,723,794	$35.95B	—
2022Q2	16	37,130,207	$38.72B	+2
2022Q3	15	36,048,154	$1.60B	-1
2022Q4	15	35,357,988	$1.82B	—
2023Q1	14	35,419,950	$2.19B	-1
2023Q2	14	33,967,213	$2.11B	—
2023Q3	15	33,885,908	$1.54B	+1
2023Q4	12	32,293,458	$1.33B	-3
2024Q1	13	33,272,710	$870.4M	+1
2024Q2	14	31,069,025	$827.1M	+1
2024Q3	16	20,099,248	$612.0M	+2
2024Q4	12	18,913,115	$548.9M	-4
2025Q1	14	19,437,972	$530.9M	+2
2025Q2	13	19,098,534	$576.1M	-1
2025Q3	11	13,189,267	$230.3M	-2
2025Q4	13	8,160,638	$141.8M	+2

Who owns IRDM

13 super-investors · 2025Q4

Tracked stake

8.16M

Combined value

$142M

% of shares outstanding

—

shares-out unknown

Quarter action mix

New2Added3Trim8

#	Manager	Shares	Value	% of book	Last action
1	Cathie Wood ARK Invest	2.85M	$50M	0.3%	Trim−3.64M
2	Ken Griffin Citadel Advisors	1.14M	$20M	0.0%	Trim−509.6K
3	Izzy Englander Millennium Mgmt	1.04M	$18M	0.0%	Trim−2.00M
4	Two Sigma Investments	700.5K	$12M	0.0%	Trim−39.0K
5	Paul Tudor Jones Tudor Investment	666.0K	$12M	0.0%	New+666.0K
6	AQR Capital Management	479.1K	$8M	0.0%	Added+351.1K
7	Ray Dalio Bridgewater Associates	419.8K	$7M	0.0%	Added+303.1K
8	Steve Cohen Point72	248.5K	$4M	0.0%	New+248.5K
9	Ken Griffin Citadel Advisors	212.9K	$4M	0.0%	Trim−509.6K
10	Ron Baron Baron Capital / BAMCO	200.0K	$3M	0.0%	Trim−482.9K
11	T. Rowe Price	89.9K	$2M	0.0%	Trim−15.3K
12	D.E. Shaw & Co.	65.4K	$1M	0.0%	Added+13.6K
13	Ken Griffin Citadel Advisors	50.3K	$874K	0.0%	Trim−509.6K

Recent moves

20 transactions

TRIMRon Baron (Baron Capital / BAMCO)
−482,926 · 2025Q4
TRIMIzzy Englander (Millennium Mgmt)
−2,002,450 · 2025Q4
ADDAQR Capital Management
+351,059 · 2025Q4
ADDD.E. Shaw & Co.
+13,561 · 2025Q4
TRIMKen Griffin (Citadel Advisors)
−509,628 · 2025Q4
NEWSteve Cohen (Point72)
+248,461 · 2025Q4
TRIMT. Rowe Price
−15,316 · 2025Q4
NEWPaul Tudor Jones (Tudor Investment)
+666,046 · 2025Q4
TRIMTwo Sigma Investments
−39,046 · 2025Q4
ADDRay Dalio (Bridgewater Associates)
+303,112 · 2025Q4
TRIMCathie Wood (ARK Invest)
−3,639,502 · 2025Q4
SOLDSteve Cohen (Point72)
−136,311 · 2025Q3
ADDD.E. Shaw & Co.
+15,849 · 2025Q3
TRIMT. Rowe Price
−1,863,323 · 2025Q3
ADDTwo Sigma Investments
+567,971 · 2025Q3
TRIMRon Baron (Baron Capital / BAMCO)
−7,694,981 · 2025Q3
TRIMAQR Capital Management
−78,468 · 2025Q3
ADDIzzy Englander (Millennium Mgmt)
+2,208,857 · 2025Q3
NEWRay Dalio (Bridgewater Associates)
+116,726 · 2025Q3
SOLDNorges Bank (Norway SWF)
−540,176 · 2025Q3

Embed this chart

Paste this iframe anywhere to embed the live IRDM chart.

<iframe src="https://openstocks.me/embed/stocks/IRDM" width="100%" height="480" frameborder="0" loading="lazy" title="IRDM chart by OpenStocks" style="border:0;border-radius:12px;background:transparent"></iframe>

Preview: https://openstocks.me/embed/stocks/IRDM

Explore related topics