Ticker: ISTR CUSIP: 46134L105 Class: Common Stock
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 17,779 | $475 | $24.59 | $21.43 - $27.95 |
| Q3 2025 | 10,557 | $245 | $22.44 | $19.17 - $23.70 |
| Q2 2025 | 9,361 | $181 | $18.45 | $15.39 - $20.38 |
| Q1 2025 | 6,926 | $122 | $18.75 | $16.70 - $22.05 |
| Q4 2024 | 8,309 | $182 | $21.91 | $18.17 - $24.80 |
| Q3 2024 | 5,621 | $109 | $17.59 | $14.91 - $19.96 |
| Q2 2024 | 5,439 | $84 | $15.81 | $14.60 - $16.97 |
| Q1 2024 | 1,442 | $24 | $16.49 | $14.82 - $17.99 |
| Q4 2023 | 1,442 | $21 | $11.37 | $9.07 - $15.19 |
| Q3 2023 | 1,564 | $17 | $12.85 | $10.47 - $15.63 |
| Q2 2023 | 1,563 | $19 | $12.26 | $10.71 - $15.63 |
| Q1 2023 | 2,710 | $38 | $19.27 | $13.50 - $22.20 |
| Q4 2022 | 1,221 | $26 | $21.45 | $19.75 - $22.48 |
| Q3 2022 | 1,221 | $24 | $21.80 | $19.90 - $23.72 |
| Q2 2022 | 1,059 | $23 | $20.48 | $18.62 - $23.23 |
| Q1 2022 | 1,055 | $20 | $19.36 | $18.07 - $20.45 |
| Q4 2021 | 1,055 | $19 | $18.74 | $17.07 - $22.47 |
| Q3 2021 | 1,055 | $23 | $22.22 | $21.08 - $23.51 |
| Q2 2021 | 1,057 | $24 | $22.09 | $20.30 - $23.69 |
| Q1 2021 | 15,271 | $315 | $18.78 | $15.66 - $23.45 |
| Q4 2020 | 23,777 | $393 | $15.38 | $12.51 - $17.39 |
| Q3 2020 | 25,533 | $327 | $13.65 | $12.35 - $15.21 |
| Q2 2020 | 29,039 | $422 | $12.74 | $10.00 - $16.57 |
| Q1 2020 | 26,837 | $343 | $20.32 | $8.49 - $24.40 |
| Q4 2019 | 24,906 | $598 | $24.60 | $23.10 - $26.46 |
| Q3 2019 | 30,125 | $718 | $23.51 | $21.48 - $24.50 |
| Q2 2019 | 32,779 | $782 | $23.29 | $22.22 - $24.50 |
| Q1 2019 | 32,058 | $728 | $23.58 | $21.64 - $25.29 |
| Q4 2018 | 34,723 | $861 | $24.99 | $19.49 - $27.84 |
| Q3 2018 | 30,828 | $828 | $27.20 | $24.40 - $29.90 |
| Q2 2018 | 28,934 | $800 | $26.87 | $24.05 - $28.95 |
| Q1 2018 | 28,724 | $745 | $24.78 | $23.10 - $26.55 |
| Q4 2017 | 27,259 | $657 | $23.73 | $20.35 - $24.60 |
| Q3 2017 | 20,500 | $494 | $22.68 | $20.25 - $24.15 |
| Q2 2017 | 4 | $0 | $22.44 | $21.27 - $23.75 |
| Q2 2016 | 4,965 | $76 | $15.36 | $14.61 - $16.48 |
| Q1 2016 | 5,268 | $77 | $15.37 | $13.63 - $17.63 |
| Q4 2015 | 5,543 | $98 | $16.65 | $15.39 - $18.00 |
| Q3 2015 | 4,402 | $68 | $15.58 | $14.95 - $16.52 |
| Q2 2015 | 3,302 | $50 | $15.62 | $14.65 - $17.20 |
| Q1 2015 | 2,719 | $47 | $14.89 | $13.35 - $17.42 |
| Q4 2014 | 3,247 | $45 | $13.63 | $13.00 - $15.00 |