Ticker · CUSIP 46134L105
Holders (tracked)
4
Combined shares
388,299
Combined value
$10.38M
Last close
$28.70
Quarter
2025Q4
Price · 1Y$28.70+12.79 (+80.36%)H $29.99 · L $15.91 · Avg Vol 61K
Position opened
Tracked holders · last 8 quarters
-1 vs previous quarter over the last 8.
Price is +7.4% vs the avg quarter-end implied price across tracked holders.
SEC event timeline
10 events
- Two Sigma Investments trimmed2026-02-17−11,803 shares · 2025Q4Position
- Ken Griffin (Citadel Advisors) exited2026-02-17−13,640 shares · 2025Q4Position
- Wellington Management trimmed2026-02-17−9,671 shares · 2025Q4Position
- AQR Capital Management added2026-02-17+8,255 shares · 2025Q4Position
- Renaissance Technologies trimmed2026-02-12−18,800 shares · 2025Q4Position
- AQR Capital Management opened position2025-11-14+17,077 shares · 2025Q3Position
- Izzy Englander (Millennium Mgmt) exited2025-11-14−29,889 shares · 2025Q3Position
- Two Sigma Investments added2025-11-14+7,220 shares · 2025Q3Position
- Wellington Management added2025-11-14+85,498 shares · 2025Q3Position
- Renaissance Technologies trimmed2025-11-13−3,700 shares · 2025Q3Position
Insider activity
No insider transactions in the last 30 days.
Follow-the-investor returns
If you'd copied each holder of ISTR…
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 |
|---|---|---|---|---|
| Renaissance Technologies | 2017Q1 | $18.54 | +54.8% | $1.4M |
| Wellington Management | 2016Q1 | $19.48 | +47.4% | $8.1M |
| Two Sigma Investments | 2021Q2 | $20.09 | +42.8% | $900K |
| AQR Capital Management | 2025Q3 | $24.35 | +17.8% | $727K |
Who moved on this name in 2025Q4
Position changes 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 | $8.2M |
| 2022Q4 | 5 | $8.9M |
| 2023Q1 | 5 | $6.0M |
| 2023Q2 | 5 | $4.6M |
| 2023Q3 | 4 | $2.6M |
| 2023Q4 | 4 | $3.7M |
| 2024Q1 | 4 | $5.9M |
| 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
Embed this chart
Paste this iframe anywhere to embed the live ISTR chart.
<iframe src="https://openstocks.me/embed/stocks/ISTR" width="100%" height="480" frameborder="0" loading="lazy" title="ISTR chart by OpenStocks" style="border:0;border-radius:12px;background:transparent"></iframe>Explore related topics
- ISTR insider tradingEvery Form 4 filing by ISTR officers, directors, and 10%+ holders.
- ISTR analyst target pricesWall Street consensus target, analyst-by-analyst breakdown, and revision history.
- Most popular hedge-fund stocksSee where this ticker ranks against the broader smart-money consensus.
- All insider tradingCross-ticker view of where corporate insiders are buying on the open market.
- Congress stock tradesReal-time PTR disclosures filed under the STOCK Act.
- Smart-money signalsComposite signals where institutional, insider and Congress flows converge.