Iridium Communications
IRDM · NASDAQ
$43.94−$0.24 (−0.54%)TodayMarket closed ·
Prev close $44.18
Who owns IRDM
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 53.5% of IRDM’s shares.
- BlackRock Institutional Trust Company, N.A.11.6%
- Baralonco, Ltd.9.4%
- AQR Capital Management, LLC6.6%
- Vanguard Portfolio Management, LLC5.1%
- Next 6 largest institutions20.7%
- All other shareholders46.5%
| Holder | Shares | % of shares |
|---|---|---|
| BlackRock Institutional Trust Company, N.A. | 12.32M | 11.63% |
| Baralonco, Ltd. | 10.00M | 9.44% |
| AQR Capital Management, LLC | 6.98M | 6.59% |
| Vanguard Portfolio Management, LLC | 5.44M | 5.13% |
| American Century Investment Management, Inc. | 4.86M | 4.58% |
| State Street Investment Management (US) | 4.73M | 4.47% |
| Vanguard Capital Management, LLC | 4.23M | 3.99% |
| Silver Heights Capital Management, Inc. | 3.27M | 3.09% |
| Gotham Asset Management, LLC | 2.51M | 2.37% |
| Dimensional Fund Advisors, L.P. | 2.36M | 2.23% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| iShares Core S&P Small-Cap ETF | 6.45M | 6.08% |
| Avantis US Small Cap Value ETF | 3.86M | 3.64% |
| Vanguard Total Stock Market Index Fund | 2.86M | 2.70% |
| VanEck Space Innovators UCITS ETF Fund | 2.21M | 2.08% |
| Vanguard Small-Cap Index Fund | 2.07M | 1.95% |
Insider trades
Form 4 filings by officers, directors and large holders
Over the last 6 months, insiders sold $19.65M (11 trades) of IRDM on the open market, with no buys.
| Insider | Type | Shares | Value |
|---|---|---|---|
| FRAZIER LEON ANTHONY | Award | 106 | — |
| Sears Kay | Award | 34 | — |
| Alterman Louis M | Award | 43 | — |
| Shivanandan Monique S. | Award | 50 | — |
| Olson Eric T | Award | 442 | — |
| Canfield Thomas C | Award | 734 | — |
| YEANEY JACQUELINE E | Award | 34 | — |
| NIEHAUS ROBERT H | Award | 56 | — |
| FITZPATRICK THOMAS | Award | 56 | — |
| Last Timothy James | Sale | 5.77K | $267.39K |
Short interest
Settled Sep 30, 2026
- Shares short
- 3.37M
- Days to cover
- 2.46
- % of shares outstanding
- 3.18%
- Average daily volume
- 1.37M
- Change since last report
- −0.9%
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