IRDM
Iridium Communications Inc. · Communication Services · Telecommunications Services
Momentum inputs (comparable managers):
holder breadth +14.3% ·
share flow +22.2% ·
net new positions +12.5%
— formula
Broad accumulation — rising shares across more holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q1 2025
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 118 | +3 | 67.66M | $3.71B | +11 | −8 |
| Q1 2026 | 118 | +7 | 65.96M | $1.83B | +13 | −6 |
| Q4 2025 | 110 | +1 | 73.07M | $1.27B | +1 | — |
| Q3 2025 | 19 | -1 | 45.20M | $789.23M | +1 | −3 |
| Q2 2025 | 18 | -1 | 39.05M | $1.18B | +1 | −2 |
| Q1 2025 | 16 | +2 | 18.96M | $517.90M | +2 | — |
| Q4 2024 | 14 | 0 | 15.52M | $450.38M | — | — |
| Q3 2024 | 13 | -1 | 12.19M | $371.05M | +1 | −2 |
| Q2 2024 | 14 | — | 12.30M | $327.45M | — | — |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | ARK Investment Management ✦ | 4.89M | +95.1% | $133.64M | 1.3% | ▲ Add | 4 | SEC ↗ |
| 2 | State Street Global Advisors ✦ (passive) | 4.46M | +1.6% | $121.73M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 3 | Geode Capital Management ✦ (passive) | 2.02M | +0.7% | $55.22M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 4 | Geode Capital Management ✦ (passive) | 2.02M | +0.7% | $55.22M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 5 | T. Rowe Price ✦ | 1.95M | +13.7% | $53.16M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 6 | T. Rowe Price ✦ | 1.95M | +13.7% | $53.16M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 7 | Millennium Management ✦ | 1.45M | +82.2% | $39.56M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 8 | Norges Bank ✦ (passive) | 900.51K | -7.5% | $24.60M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 9 | Gotham Asset Management ✦ | 879.38K | +25.0% | $24.02M | 0.2% | ▲ Add | 4 | SEC ↗ |
| 10 | Arrowstreet Capital ✦ | 548.38K | +27.3% | $14.98M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 11 | Citadel Advisors ✦ | 415.35K | +39.0% | $11.35M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 12 | Citadel Advisors ✦ | 415.35K | +39.0% | $11.35M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 13 | AQR Capital Management ✦ | 410.48K | -56.4% | $11.09M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 14 | AQR Capital Management ✦ | 410.48K | -56.4% | $11.09M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 15 | AQR Capital Management ✦ | 410.48K | -56.4% | $11.09M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 16 | AQR Capital Management ✦ | 410.48K | -56.4% | $11.09M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 17 | Renaissance Technologies ✦ | 296.70K | +1750.9% | $8.11M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 18 | D. E. Shaw & Co. ✦ | 218.86K | -53.4% | $5.98M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 19 | D. E. Shaw & Co. ✦ | 218.86K | -53.4% | $5.98M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 20 | Marshall Wace ✦ | 195.25K | +1452.6% | $5.33M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 21 | Marshall Wace ✦ | 195.25K | +1452.6% | $5.33M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 22 | Marshall Wace ✦ | 195.25K | +1452.6% | $5.33M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 23 | Point72 Asset Management ✦ | 190.80K | -29.4% | $5.21M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 24 | Bridgewater Associates ✦ | 81.73K | New | $2.23M | 0.0% | New | 1 | SEC ↗ |
| 25 | Two Sigma Investments ✦ | 61.44K | New | $1.68M | 0.0% | New | 1 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| Bridgewater Associates | $2.23M | 0.0% |
| Two Sigma Investments | $1.68M | 0.0% |
Exited
| No tracked exits this quarter. |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 376 holders, 88.61M shares, $2.35B reported. This is a different, older period than the tracked-universe figures above and the two are never mixed.
What else this security's tracked holders most often hold — shared-ownership counts, not fundamental relationships.
Open-market purchases (P)
No open-market insider purchases in our coverage window.
Open-market sales (S)
Director · 15.05K sh · $740,263
Director · 8.00K sh · $404,880
Officer · 32.65K sh · $1.64M
Officer · 544 sh · $27,662
Officer, Director · 85.45K sh · $4.30M
Officer · 13.47K sh · $680,521
Officer · 19.02K sh · $957,327
Officer · 500 sh · $25,440
Director · 209.23K sh · $10.51M
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology
9.4% of class · View original SEC filing ↗