Ticker: ISTR CUSIP: 46134L105 Class: Common Stock
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 532,484 | $14,228 | $24.59 | $21.43 - $27.95 |
| Q3 2025 | 523,749 | $12,156 | $22.44 | $19.17 - $23.70 |
| Q2 2025 | 524,238 | $10,128 | $18.45 | $15.39 - $20.38 |
| Q1 2025 | 524,475 | $9,236 | $18.75 | $16.70 - $22.05 |
| Q4 2024 | 525,974 | $11,550 | $21.91 | $18.17 - $24.80 |
| Q3 2024 | 524,372 | $10,173 | $17.59 | $14.91 - $19.96 |
| Q2 2024 | 517,681 | $7,972 | $15.81 | $14.60 - $16.97 |
| Q1 2024 | 471,690 | $7,717 | $16.49 | $14.82 - $17.99 |
| Q4 2023 | 471,690 | $7,033 | $11.37 | $9.07 - $15.19 |
| Q3 2023 | 470,216 | $4,980 | $12.85 | $10.47 - $15.63 |
| Q2 2023 | 470,216 | $5,694 | $12.26 | $10.71 - $15.63 |
| Q1 2023 | 471,794 | $6,586 | $19.27 | $13.50 - $22.20 |
| Q4 2022 | 471,734 | $10,156 | $21.45 | $19.75 - $22.48 |
| Q3 2022 | 402,082 | $8,002 | $21.80 | $19.90 - $23.72 |
| Q2 2022 | 413,560 | $9,057 | $20.48 | $18.62 - $23.23 |
| Q1 2022 | 415,999 | $7,941 | $19.36 | $18.07 - $20.45 |
| Q4 2021 | 418,574 | $7,706 | $18.74 | $17.07 - $22.47 |
| Q3 2021 | 448,835 | $9,883 | $22.22 | $21.08 - $23.51 |
| Q2 2021 | 453,138 | $10,372 | $22.09 | $20.30 - $23.69 |
| Q1 2021 | 474,638 | $9,754 | $18.78 | $15.66 - $23.45 |
| Q4 2020 | 470,143 | $7,777 | $15.38 | $12.51 - $17.39 |
| Q3 2020 | 466,931 | $5,986 | $13.65 | $12.35 - $15.21 |
| Q2 2020 | 467,860 | $6,785 | $12.74 | $10.00 - $16.57 |
| Q1 2020 | 469,748 | $5,998 | $20.32 | $8.49 - $24.40 |
| Q4 2019 | 469,344 | $11,264 | $24.60 | $23.10 - $26.46 |
| Q3 2019 | 438,851 | $10,445 | $23.51 | $21.48 - $24.50 |
| Q2 2019 | 438,014 | $10,447 | $23.29 | $22.22 - $24.50 |
| Q1 2019 | 439,773 | $9,987 | $23.58 | $21.64 - $25.29 |
| Q4 2018 | 437,784 | $10,857 | $24.99 | $19.49 - $27.84 |
| Q3 2018 | 387,878 | $10,414 | $27.20 | $24.40 - $29.90 |
| Q2 2018 | 386,191 | $10,679 | $26.87 | $24.05 - $28.95 |
| Q1 2018 | 367,698 | $9,505 | $24.78 | $23.10 - $26.55 |
| Q4 2017 | 359,915 | $8,674 | $23.73 | $20.35 - $24.60 |
| Q3 2017 | 357,786 | $8,622 | $22.68 | $20.25 - $24.15 |
| Q2 2017 | 366,623 | $8,396 | $22.44 | $21.27 - $23.75 |
| Q1 2017 | 277,190 | $6,070 | $20.29 | $18.31 - $22.50 |
| Q4 2016 | 272,890 | $5,090 | $17.15 | $15.40 - $19.70 |
| Q3 2016 | 272,890 | $4,189 | $15.43 | $15.00 - $16.46 |
| Q2 2016 | 228,504 | $3,514 | $15.36 | $14.61 - $16.48 |
| Q1 2016 | 206,221 | $3,025 | $15.37 | $13.63 - $17.63 |
| Q4 2015 | 205,521 | $3,618 | $16.65 | $15.39 - $18.00 |
| Q3 2015 | 204,921 | $3,174 | $15.58 | $14.95 - $16.52 |
| Q2 2015 | 204,321 | $3,106 | $15.62 | $14.65 - $17.20 |
| Q1 2015 | 203,821 | $3,485 | $14.89 | $13.35 - $17.42 |