Ticker · CUSIP 46134L105
Holders (tracked)
4
Combined shares
388,299
Combined value
$10.38M
Last close
—
Quarter
2025Q4
Tracked holders · last 8 quarters
-1 vs previous quarter over the last 8.
SEC event timeline
10 events
- Two Sigma Investments trimmed2026-02-17−11,803 shares · 2025Q413F
- Ken Griffin (Citadel Advisors) exited2026-02-17−13,640 shares · 2025Q413F
- Wellington Management trimmed2026-02-17−9,671 shares · 2025Q413F
- AQR Capital Management added2026-02-17+8,255 shares · 2025Q413F
- Renaissance Technologies trimmed2026-02-12−18,800 shares · 2025Q413F
- AQR Capital Management opened position2025-11-14+17,077 shares · 2025Q313F
- Izzy Englander (Millennium Mgmt) exited2025-11-14−29,889 shares · 2025Q313F
- Two Sigma Investments added2025-11-14+7,220 shares · 2025Q313F
- Wellington Management added2025-11-14+85,498 shares · 2025Q313F
- Renaissance Technologies trimmed2025-11-13−3,700 shares · 2025Q313F
Insider activity
No insider transactions in the last 30 days.
Who moved on this name in 2025Q4
13F transactions reported for the latest quarter, grouped by direction.
New positions0
—
Added to1
- AQR Capital Management+8,255$221K
Trimmed3
- Renaissance Technologies−18,800$502K
- Two Sigma Investments−11,803$315K
- Wellington Management−9,671$258K
Exited1
- Ken Griffin (Citadel Advisors)−13,640$317K
Institutional ownership over time
Distinct super-investors holding this ticker · combined dollar value, by quarter.
| Quarter | Holders | Combined value |
|---|---|---|
| 2022Q1 | 5 | $8.5M |
| 2022Q2 | 5 | $9.4M |
| 2022Q3 | 5 | $8K |
| 2022Q4 | 5 | $7.2M |
| 2023Q1 | 5 | $4.8M |
| 2023Q2 | 5 | $4.3M |
| 2023Q3 | 4 | $2.4M |
| 2023Q4 | 4 | $3.2M |
| 2024Q1 | 4 | $5.6M |
| 2024Q2 | 5 | $11.4M |
| 2024Q3 | 3 | $4.9M |
| 2024Q4 | 3 | $2.5M |
| 2025Q1 | 5 | $6.5M |
| 2025Q2 | 5 | $7.0M |
| 2025Q3 | 5 | $10.1M |
| 2025Q4 | 4 | $10.4M |
Who owns ISTR
4 super-investors · 2025Q4
Tracked stake
388.3K
shares
Combined value
$10M
% of shares outstanding
—
shares-out unknown
Quarter action mix
Added1Trim3
| # | Manager | Shares | Value |
|---|---|---|---|
| 1 | Wellington Management | 282.4K | $8M |
| 2 | Renaissance Technologies | 49.2K | $1M |
| 3 | Two Sigma Investments | 31.4K | $838K |
| 4 | AQR Capital Management | 25.3K | $677K |
Recent moves
20 transactions
- −11,803 · 2025Q4
- −13,640 · 2025Q4
- +8,255 · 2025Q4
- −9,671 · 2025Q4
- −18,800 · 2025Q4
- −29,889 · 2025Q3
- +85,498 · 2025Q3
- +7,220 · 2025Q3
- +17,077 · 2025Q3
- −3,700 · 2025Q3
- −1,636 · 2025Q2
- −1,256 · 2025Q2
- +7,500 · 2025Q2
- +1,900 · 2025Q1
- +14,173 · 2025Q1
- +4,300 · 2025Q1
- +206,600 · 2025Q1
- −161,182 · 2024Q4
- +29,625 · 2024Q4
- −4,194 · 2024Q4
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