IRDMIridium Communications Inc.

$47.48+167% 1Y

Who owns IRDM

473 institutions reported holding IRDM for 2026Q2, together 86% of the company, more than the 375 a quarter earlier.

473

Institutions reporting a position · as of 2026Q2 · up from 375 the quarter before

Shares held by institutions
91.2M

Shares held by institutions · 86% of the company · long US equity positions only, as reported on Form 13F

Reported value
$5.00B

Reported value · at Jun 30, 2026 prices, not today's

Top 5 holders
38%

Top 5 holders · of the whole company, between five filers

Details›
Reporting quarter2026-06-30
2026Q2
Quarters on record
53
New positions
155
Positions exited
57
Added to
135
Reduced
116
Top 10 holdersof the company
50%
Shares sold shortsettled Sep 15, 2026
3.4M
Short interestof shares outstanding
3.2%
Days to coverat the average daily volume
4.8
Change in the short positionsince the Aug 31, 2026 count
+33%
Institutional ownership by quarter, 2013Q2 to 2026Q2
QuarterFilersSharesReported value
2026Q247391.2M$5.00B
2026Q137589.8M$2.49B
2025Q432293.7M$1.63B
2025Q3319101.0M$1.78B
2025Q2327101.2M$3.05B
2025Q1348103.8M$2.84B
2024Q434799.9M$2.90B
2024Q334998.1M$3.00B
2024Q2340101.2M$2.69B
2024Q1324103.4M$2.71B
2023Q4338103.1M$4.24B
2023Q3356101.2M$4.60B
2023Q2386103.0M$6.40B
2023Q1367105.2M$6.51B
2022Q4363104.3M$5.36B
2022Q3329106.7M$4.73B
Largest reported holders, 2026Q2
HolderShares% of companyValue
BlackRock Inc.13.4M13%$738M
VANGUARD GROUP INC10.5M9.9%$577M
AQR CAPITAL MANAGEMENT LLC6.8M6.4%$374M
AMERICAN CENTURY COMPANIES INC4.9M4.6%$266M
STATE STREET CORP4.7M4.4%$260M
Silver Heights Capital Management Inc3.3M3.1%$180M
Gotham Asset Management, LLC2.5M2.4%$138M
DIMENSIONAL FUND ADVISORS LP2.4M2.2%$129M
VAN ECK ASSOCIATES CORP2.3M2.1%$125M
Pacer Advisors, Inc.2.2M2.0%$119M
Short interest by settlement date, Aug 29, 2025 to Sep 15, 2026
SettlementShares shortOf shares outstandingDays to cover
Sep 15, 20263.4M3.2%4.8
Aug 31, 20262.6M2.4%2.8
Aug 14, 20262.9M2.7%2.8
Jul 31, 20263.5M3.2%2.2
Jul 15, 20262.8M2.7%1.3
Jun 30, 20264.4M4.1%1.0
Jun 15, 20269.5M8.9%3.4
May 29, 20265.7M5.3%2.5
May 15, 20265.7M5.3%2.9
Apr 30, 20265.4M5.1%1.7
Apr 15, 20265.4M5.1%2.2
Mar 31, 20265.5M5.1%2.5

SEC Form 13F data sets (DERA bulk files). 13F is quarterly, filed up to 45 days late, and covers long US equity positions only, no shorts, no derivatives, nothing held below the reporting threshold. The short position is FINRA's consolidated count for each twice-monthly settlement date, as a share of shares outstanding.

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