Ticker · CUSIP 46269C102
Holders (tracked)
13
Combined shares
8,160,638
Combined value
$141.81M
Last close
$41.85
Quarter
2025Q4
Price · 1Y$41.85+18.72 (+80.95%)H $43.41 · L $15.62 · Avg Vol 2.2M
Tracked holders · last 8 quarters
+2 vs previous quarter over the last 8.
Price is +140.8% vs the avg quarter-end implied price across tracked holders.
SEC event timeline
23 events
- AQR Capital Management added2026-02-17+351,059 shares · 2025Q4Position
- Ken Griffin (Citadel Advisors) trimmed2026-02-17−509,628 shares · 2025Q4Position
- D.E. Shaw & Co. added2026-02-17+13,561 shares · 2025Q4Position
- Two Sigma Investments trimmed2026-02-17−39,046 shares · 2025Q4Position
- T. Rowe Price trimmed2026-02-17−15,316 shares · 2025Q4Position
- −482,926 shares · 2025Q4Position
- Izzy Englander (Millennium Mgmt) trimmed2026-02-17−2,002,450 shares · 2025Q4Position
- Steve Cohen (Point72) opened position2026-02-17+248,461 shares · 2025Q4Position
- +666,046 shares · 2025Q4Position
- Ray Dalio (Bridgewater Associates) added2026-02-13+303,112 shares · 2025Q4Position
- Cathie Wood (ARK Invest) trimmed2026-02-11−3,639,502 shares · 2025Q4Position
- AQR Capital Management trimmed2025-11-14−78,468 shares · 2025Q3Position
- Izzy Englander (Millennium Mgmt) added2025-11-14+2,208,857 shares · 2025Q3Position
- Steve Cohen (Point72) exited2025-11-14−136,311 shares · 2025Q3Position
- Two Sigma Investments added2025-11-14+567,971 shares · 2025Q3Position
- D.E. Shaw & Co. added2025-11-14+15,849 shares · 2025Q3Position
- T. Rowe Price trimmed2025-11-14−1,863,323 shares · 2025Q3Position
- −7,694,981 shares · 2025Q3Position
- +116,726 shares · 2025Q3Position
- Norges Bank (Norway SWF) exited2025-11-13−540,176 shares · 2025Q3Position
- Mario Gabelli (GAMCO) exited2025-11-12−8,600 shares · 2025Q3Position
- Norges Bank (Norway SWF) trimmed2025-11-12−33,903 shares · 2024Q3Position
- Cathie Wood (ARK Invest) added2025-11-12+1,156,580 shares · 2025Q3Position
Insider activity
No insider transactions in the last 30 days.
Follow-the-investor returns
If you'd copied each holder of IRDM…
Cost basis inferred from each manager's quarter-over-quarter position changes. Sorted by % return on the position they're still holding.
| Investor | First in | Cost basis | Return | Position value today |
|---|---|---|---|---|
| Ken Griffin (Citadel Advisors) | 2016Q1 | $17.44 | +140.0% | $2.1M |
| Ken Griffin (Citadel Advisors) | 2016Q1 | $17.44 | +140.0% | $2.1M |
| Ken Griffin (Citadel Advisors) | 2016Q1 | $17.44 | +140.0% | $2.1M |
| Ron Baron (Baron Capital / BAMCO) | 2016Q1 | $18.33 | +128.3% | $8.4M |
| Paul Tudor Jones (Tudor Investment) | 2016Q2 | $18.59 | +125.1% | $27.9M |
| Ray Dalio (Bridgewater Associates) | 2025Q1 | $19.32 | +116.6% | $17.6M |
| Two Sigma Investments | 2016Q4 | $20.37 | +105.4% | $29.3M |
| AQR Capital Management | 2016Q1 | $21.42 | +95.4% | $20.1M |
| Izzy Englander (Millennium Mgmt) | 2017Q1 | $21.91 | +91.0% | $43.4M |
| Steve Cohen (Point72) | 2019Q2 | $24.23 | +72.7% | $10.4M |
| D.E. Shaw & Co. | 2016Q1 | $24.92 | +67.9% | $2.7M |
| Cathie Wood (ARK Invest) | 2019Q3 | $29.27 | +43.0% | $119.3M |
| T. Rowe Price | 2018Q4 | $36.20 | +15.6% | $3.8M |
Who moved on this name in 2025Q4
Position changes reported for the latest quarter, grouped by direction.
New positions2
- Paul Tudor Jones (Tudor Investment)+666,046$11.6M
- Steve Cohen (Point72)+248,461$4.3M
Added to3
- AQR Capital Management+351,059$6.1M
- Ray Dalio (Bridgewater Associates)+303,112$5.3M
- D.E. Shaw & Co.+13,561$236K
Trimmed6
- Cathie Wood (ARK Invest)−3,639,502$63.3M
- Izzy Englander (Millennium Mgmt)−2,002,450$34.8M
- Ken Griffin (Citadel Advisors)−509,628$8.9M
- Ron Baron (Baron Capital / BAMCO)−482,926$8.4M
- Two Sigma Investments−39,046$679K
- T. Rowe Price−15,316$266
Exited0
—
Institutional ownership over time
Distinct super-investors holding this ticker · combined dollar value, by quarter.
| Quarter | Holders | Combined value |
|---|---|---|
| 2022Q1 | 14 | $35.95B |
| 2022Q2 | 16 | $38.72B |
| 2022Q3 | 15 | $1.60B |
| 2022Q4 | 15 | $1.82B |
| 2023Q1 | 14 | $2.19B |
| 2023Q2 | 14 | $2.11B |
| 2023Q3 | 15 | $1.54B |
| 2023Q4 | 12 | $1.33B |
| 2024Q1 | 13 | $870.4M |
| 2024Q2 | 14 | $827.1M |
| 2024Q3 | 16 | $612.0M |
| 2024Q4 | 12 | $548.9M |
| 2025Q1 | 14 | $530.9M |
| 2025Q2 | 13 | $576.1M |
| 2025Q3 | 11 | $230.3M |
| 2025Q4 | 13 | $141.8M |
Who owns IRDM
13 super-investors · 2025Q4
Tracked stake
8.16M
shares
Combined value
$142M
% of shares outstanding
—
shares-out unknown
Quarter action mix
New2Added3Trim8
| # | Manager | Shares | Value |
|---|---|---|---|
| 1 | Cathie Wood ARK Invest | 2.85M | $50M |
| 2 | Ken Griffin Citadel Advisors | 1.14M | $20M |
| 3 | Izzy Englander Millennium Mgmt | 1.04M | $18M |
| 4 | Two Sigma Investments | 700.5K | $12M |
| 5 | Paul Tudor Jones Tudor Investment | 666.0K | $12M |
| 6 | AQR Capital Management | 479.1K | $8M |
| 7 | Ray Dalio Bridgewater Associates | 419.8K | $7M |
| 8 | Steve Cohen Point72 | 248.5K | $4M |
| 9 | Ken Griffin Citadel Advisors | 212.9K | $4M |
| 10 | Ron Baron Baron Capital / BAMCO | 200.0K | $3M |
| 11 | T. Rowe Price | 89.9K | $2M |
| 12 | D.E. Shaw & Co. | 65.4K | $1M |
| 13 | Ken Griffin Citadel Advisors | 50.3K | $874K |
Recent moves
20 transactions
- −482,926 · 2025Q4
- −2,002,450 · 2025Q4
- +351,059 · 2025Q4
- +13,561 · 2025Q4
- −509,628 · 2025Q4
- +248,461 · 2025Q4
- TRIMT. Rowe Price−15,316 · 2025Q4
- +666,046 · 2025Q4
- −39,046 · 2025Q4
- +303,112 · 2025Q4
- −3,639,502 · 2025Q4
- −136,311 · 2025Q3
- +15,849 · 2025Q3
- TRIMT. Rowe Price−1,863,323 · 2025Q3
- +567,971 · 2025Q3
- −7,694,981 · 2025Q3
- −78,468 · 2025Q3
- +2,208,857 · 2025Q3
- +116,726 · 2025Q3
- −540,176 · 2025Q3
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