Iridium Communications
IRDM
331 hedge funds and large institutions have $3.06B invested in Iridium Communications in 2025 Q2 according to their latest regulatory filings, with 49 funds opening new positions, 110 increasing their positions, 143 reducing their positions, and 67 closing their positions.
50% more funds holding in top 10
Funds holding in top 10: 2 → 3 (+1)
8% more capital invested
Capital invested by funds: $2.84B → $3.06B (+$220M)
1.74% less ownership
Funds ownership: 95.58% → 93.84% (-1.7%)
6% less funds holding
Funds holding: 351 → 331 (-20)
23% less repeat investments, than reductions
Existing positions increased: 110 | Existing positions reduced: 143
27% less first-time investments, than exits
New positions opened: 49 | Existing positions closed: 67
36% less call options, than puts
Call options by funds: $18.4M | Put options by funds: $28.7M
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Citadel Advisors
Miami,
Florida
|
+$20.7M |
| 2 |
SAM
Synergy Asset Management
Vancouver,
Washington
|
+$17.2M |
| 3 |
SHCM
Silver Heights Capital Management
Toronto,
Ontario, Canada
|
+$13M |
| 4 |
American Century Companies
Kansas City,
Missouri
|
+$11.5M |
| 5 |
AIM
ARK Investment Management
St. Petersburg,
Florida
|
+$11.5M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
BlackRock
New York
|
-$23.6M |
| 2 |
BAMCO Inc
New York
|
-$23.2M |
| 3 |
Millennium Management
New York
|
-$16M |
| 4 |
CSS
Cubist Systematic Strategies
Stamford,
Connecticut
|
-$13.9M |
| 5 |
Qube Research & Technologies (QRT)
London,
United Kingdom
|
-$9.94M |
IRDM Hedge Fund Activity: Q2 2025 in Review
331 of the 7,613 institutional investors tracked by Wall St. Rank reported a position in Iridium Communications (IRDM) for Q2 2025, worth a combined $3.06B — up 7.7% from $2.84B a quarter earlier.
Sellers outnumbered buyers: 67 funds closed out of IRDM and 49 opened new positions — a net loss of 18 holders — while 143 trimmed existing stakes and 110 added.
The largest buyer was Citadel Advisors, adding an estimated $20.7M. The largest seller was BlackRock, cutting an estimated $23.6M.
- 331 institutional investors held Iridium Communications (IRDM) as of Q2 2025, down from 351 in Q1 2025.
- Funds reported $3.06B of Iridium Communications stock for Q2 2025, up 7.7% quarter-over-quarter.
- 49 funds opened new Iridium Communications positions in Q2 2025 and 67 closed out, a net change of -18 holders.
- The largest Iridium Communications buyer in Q2 2025 was Citadel Advisors, an estimated $20.7M added.
- The largest Iridium Communications seller in Q2 2025 was BlackRock, an estimated $23.6M sold.
Based on aggregated 13F filings for Q2 2025.