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Of the 14 tracked institutions holding IRDM, 7 have a 3-year clone track record — 5 of them beat the S&P. Average holder's clone alpha: +3.6pt. It's a gauge of who owns the name, not just how many.
Among the 14 tracked institutional investors we monitor, IRDM (IRIDIUM COMMUNICATIONS INC) is held with a combined value of $1.84B across 40,817,025 shares. The largest holder is BlackRock, Inc. with a position worth $737.59M (0.01% of their portfolio). Magnetar Financial LLC opened a new position in the most recent quarter. 5 funds increased their holdings. 8 funds reduced their position.
Total Institutional Value
$1.84B
Total Shares Held
40,817,025
Institutional Holders
14
Ranked by estimated dollars moved (share change × implied price). 13F data lags up to 45 days.
| # | Fund | Value↓ | Portfolio % | Change |
|---|---|---|---|---|
| 1 | BlackRock, Inc. | $737.59M | 0.01% | -3.5% |
| 2 | AQR CAPITAL MANAGEMENT LLC | $374.33M | 0.13% | +134.7% |
| 3 | STATE STREET CORP | $259.64M | 0.01% | -6.3% |
| 4 | VANGUARD GROUP INC | $176.53M | 0.00% | +7.1% |
| 5 | Gotham Asset Management, LLC | $137.91M | 0.32% | -25.0% |
| 6 | ARK Investment Management LLC | $66.65M | 0.43% | -29.6% |
| 7 | RENAISSANCE TECHNOLOGIES LLC | $33.45M | 0.05% | +376.0% |
| 8 | FMR LLC | $26.50M | 0.00% | -10.5% |
| 9 | MILLENNIUM MANAGEMENT LLC | $8.40M | 0.01% | -69.0% |
| 10 | Magnetar Financial LLC | $8.40M | 0.08% | New |
As of the latest SEC 13F filings, BlackRock, Inc. is the largest institutional holder of IRDM with a position worth $737.59M, representing 0.01% of their portfolio. In total, 14 institutional investors hold IRDM with a combined value of $1.84B.
In the most recent quarter, 1 fund opened a new position in IRDM. Additionally, 5 increased their holdings and 8 reduced their positions.
Institutional investors hold $1.84B worth of IRDM stock across 14 positions. The largest institutional holder is BlackRock, Inc. with $737.59M in holdings.
A 13F filing is a quarterly report required by the SEC from institutional investment managers with over $100 million in assets. It discloses their holdings in U.S. equities. For IRDM, these filings reveal which major funds are accumulating or reducing positions, providing insights into institutional sentiment.
Get notified when hedge funds change their IRDM positions.
Alpha = the manager's 3-year clone return minus the S&P 500. A skilled roster is a stronger tell than a crowded one — though even skilled managers' edge doesn't reliably survive the 13F disclosure lag. Why →
| 2026-08-12 |
| 9.4% | 2026-08-04 |
SEC Schedule 13D (activist) and 13G (passive) filings for IRDM. Filed when an investor acquires 5%+ ownership.
Last Close
$48.96
2026-10-02
YTD
+175.7%
83% of 52-week range
