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IRDM · Iridium Communications Inc.

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Market Cap
$5.05B
Shares
105.96M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 483
Total Value: $5,104,255,905
Total Shares: 93,060,072
Showing 1–100 of 499 holdings by value · page 1 of 5

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 483 13F filers · Δ vs Mar 31, 2026
Top Holder
14.5%
Sep 2023 → Jun 2026 · range 10.3% – 15.3%
−0.8 pts
Top 5
38.0%
Sep 2023 → Jun 2026 · range 35.7% – 48.7%
+0.4 pts
Top 10
53.7%
Sep 2023 → Jun 2026 · range 51.4% – 59.1%
+0.9 pts
HHI
438
Sep 2023 → Jun 2026 · range 382 – 593
Broadly held−10

Quarterly Activity

vs Mar 31, 2026
New
157
Increased
155
Decreased
125
Sold Out
58
Unchanged
46
Holder count: +99
Institutional value: +101.4%
Shares held: +1.9%

Top Buyers

vs Mar 31, 2026
Institution Added Now Holds Open

Top Sellers

vs Mar 31, 2026
Institution Sold Now Holds Open

Top New Positions

vs Mar 31, 2026
Institution Acquired Value (USD) Open

Top Sold-Out Positions

vs Mar 31, 2026
Institution Previously Held Last Value (USD) Open
Showing 100 of 499
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 1418819 CUSIP 46269C102 13F (30d) 361 filings 357 filers Visit website Investor relations