Iridium Communications
IRDM
325 hedge funds and large institutions have $1.63B invested in Iridium Communications in 2025 Q4 according to their latest regulatory filings, with 64 funds opening new positions, 109 increasing their positions, 114 reducing their positions, and 60 closing their positions.
28% more call options, than puts
Call options by funds: $12.3M | Put options by funds: $9.61M
7% more first-time investments, than exits
New positions opened: 64 | Existing positions closed: 60
0% more funds holding
Funds holding: 324 → 325 (+1)
4% less repeat investments, than reductions
Existing positions increased: 109 | Existing positions reduced: 114
6.1% less ownership
Funds ownership: 95.64% → 89.54% (-6.1%)
9% less capital invested
Capital invested by funds: $1.79B → $1.63B (-$158M)
67% less funds holding in top 10
Funds holding in top 10: 3 → 1 (-2)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
BlackRock
New York
|
+$51.2M |
| 2 |
GAM
Gotham Asset Management
New York
|
+$35.4M |
| 3 |
State Street
Boston,
Massachusetts
|
+$12.8M |
| 4 |
Vanguard Group
Malvern,
Pennsylvania
|
+$12M |
| 5 |
Barclays
London,
United Kingdom
|
+$7.83M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
AIM
ARK Investment Management
St. Petersburg,
Florida
|
-$64.3M |
| 2 |
NAMA
Nikko Asset Management Americas
New York
|
-$56.5M |
| 3 |
Sumitomo Mitsui Trust Group
Minato-Ku, Tokyo,
Japan
|
-$56.1M |
| 4 |
SAM
Synergy Asset Management
Vancouver,
Washington
|
-$40M |
| 5 |
Millennium Management
New York
|
-$35.4M |
IRDM Hedge Fund Activity: Q4 2025 in Review
325 of the 8,266 institutional investors tracked by Wall St. Rank reported a position in Iridium Communications (IRDM) for Q4 2025, worth a combined $1.63B — down 8.9% from $1.79B a quarter earlier.
Buyers outnumbered sellers: 64 funds opened new IRDM positions and 60 closed out — a net gain of 4 holders — while 109 added to existing stakes and 114 trimmed.
The largest buyer was BlackRock, adding an estimated $51.2M. The largest seller was ARK Investment Management, cutting an estimated $64.3M.
- 325 institutional investors held Iridium Communications (IRDM) as of Q4 2025, up from 324 in Q3 2025.
- Funds reported $1.63B of Iridium Communications stock for Q4 2025, down 8.9% quarter-over-quarter.
- 64 funds opened new Iridium Communications positions in Q4 2025 and 60 closed out, a net change of +4 holders.
- The largest Iridium Communications buyer in Q4 2025 was BlackRock, an estimated $51.2M added.
- The largest Iridium Communications seller in Q4 2025 was ARK Investment Management, an estimated $64.3M sold.
Based on aggregated 13F filings for Q4 2025.