Iridium Communications Inc. (IRDM) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

107,837,000Shares Outstanding

95,830,862Shares held by institutions

$4,145,643,090Value of institutional holdings

88.87%Institutional ownership %

-4.74%Shares Changed QoQ

310No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

Iridium Communications Inc. (NASDAQ:IRDM) appears in 310 institutional 13F filings for the quarter ending December 2025.

These investors held 86.7% of outstanding shares in December 2025, down from 97.4% in September 2025.
They decreased total shares held in IRDM by -5.79% quarter over quarter, and investors in Iridium Communications decreased 10.14% from a year ago.
Activity in IRDM broke down as 167 buyers, 111 sellers, and 32 unchanged among 310 total holders.
Combined, these investors held 93.46Mn shares in IRDM for December 2025, down by 5.74Mn shares quarter on quarter, and down 10.95Mn shares year over year.
Byrne Asset Management LLC holds the largest position in IRDM at 155 shares as of December 31, 2025, or 0.0% of shares outstanding.
Top sellers of IRDM stock for the quarter ending December 2025 included Byrne Asset Management LLC (5).
Per Business Quant, the top 1 investors in IRDM for the quarter ending December 2025 include Byrne Asset Management LLC (155).

310 Institutional Holders

95,830,862 Total Shares Held

Rows:

Download Data

Owner Name	Date	Shares Held	Change (QoQ)	Change (%)	Value (USD)
BlackRock, Inc.	31 Dec, 2025	13,891,150	2,895,186	26.33%	$241,428,182.00
VANGUARD GROUP INC	31 Dec, 2025	10,157,227	677,258	7.14%	$176,532,606.00
Silver Heights Capital Management Inc	31 Dec, 2025	5,251,133	61,430	1.18%	$91,264,692.00
State Street Corp	31 Dec, 2025	4,761,749	725,856	17.99%	$82,759,198.00
Goldman Sachs Group Inc	31 Dec, 2025	4,646,340	2,732,073	142.72%	$80,753,422.00
AMERICAN CENTURY COMPANIES INC	31 Dec, 2025	3,078,679	199,777	6.94%	$53,507,467.00
ARK Investment Management LLC	31 Dec, 2025	2,850,606	-3,639,502	-56.08%	$49,543,532.00
Gotham Asset Management, LLC	31 Dec, 2025	2,309,750	2,002,232	651.09%	$40,143,455.00
DIMENSIONAL FUND ADVISORS LP	31 Dec, 2025	2,093,124	-234,271	-10.07%	$36,379,548.00
GEODE CAPITAL MANAGEMENT, LLC	31 Dec, 2025	1,907,797	203,820	11.96%	$33,165,119.00
Man Group plc	31 Dec, 2025	1,851,528	-160,549	-7.98%	$32,179,556.00
Morgan Stanley	31 Dec, 2025	1,795,202	-43,028	-2.34%	$31,200,642.00
Pacer Advisors, Inc.	31 Dec, 2025	1,358,706	-385,389	-22.10%	$23,614,310.00
UBS Group AG	31 Dec, 2025	1,273,219	-95,308	-6.96%	$22,128,546.00
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	31 Dec, 2025	1,206,189	161,115	15.42%	$20,963,565.00
VAN ECK ASSOCIATES CORP	31 Dec, 2025	1,204,302	441,631	57.91%	$20,931.00
Bank of New York Mellon Corp	31 Dec, 2025	1,173,761	101,765	9.49%	$20,399,970.00
Sumitomo Mitsui Trust Group, Inc.	31 Dec, 2025	1,170,252	-3,173,418	-73.06%	$20,338,980.00
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	31 Dec, 2025	1,155,467	217,886	23.24%	$20,082,016.00
CITADEL ADVISORS LLC	31 Dec, 2025	1,140,215	-509,628	-30.89%	$19,816,937.00

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