Ticker: ISTR CUSIP: 46134L105 Class: Common Stock
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 306,896 | $8,200 | $24.59 | $21.43 - $27.95 |
| Q3 2025 | 371,102 | $8,613 | $22.44 | $19.17 - $23.70 |
| Q2 2025 | 480,906 | $9,291 | $18.45 | $15.39 - $20.38 |
| Q1 2025 | 510,906 | $8,997 | $18.75 | $16.70 - $22.05 |
| Q4 2024 | 522,117 | $11,466 | $21.91 | $18.17 - $24.80 |
| Q3 2024 | 583,925 | $11,328 | $17.59 | $14.91 - $19.96 |
| Q2 2024 | 609,617 | $9,388 | $15.81 | $14.60 - $16.97 |
| Q1 2024 | 609,617 | $10 | $16.49 | $14.82 - $17.99 |
| Q4 2023 | 609,617 | $9 | $11.37 | $9.07 - $15.19 |
| Q3 2023 | 592,699 | $6 | $12.85 | $10.47 - $15.63 |
| Q2 2023 | 592,699 | $7 | $12.26 | $10.71 - $15.63 |
| Q1 2023 | 572,699 | $8 | $19.27 | $13.50 - $22.20 |
| Q4 2022 | 572,699 | $12 | $21.45 | $19.75 - $22.48 |
| Q3 2022 | 572,699 | $11,397 | $21.80 | $19.90 - $23.72 |
| Q2 2022 | 572,699 | $12,542 | $20.48 | $18.62 - $23.23 |
| Q1 2022 | 572,699 | $10,933 | $19.36 | $18.07 - $20.45 |
| Q4 2021 | 565,199 | $10,405 | $18.74 | $17.07 - $22.47 |
| Q3 2021 | 582,854 | $12,834 | $22.22 | $21.08 - $23.51 |
| Q2 2021 | 696,642 | $15,946 | $22.09 | $20.30 - $23.69 |
| Q1 2021 | 729,119 | $14,983 | $18.78 | $15.66 - $23.45 |
| Q4 2020 | 757,594 | $12,531 | $15.38 | $12.51 - $17.39 |
| Q3 2020 | 757,594 | $9,712 | $13.65 | $12.35 - $15.21 |
| Q2 2020 | 737,594 | $10,695 | $12.74 | $10.00 - $16.57 |
| Q1 2020 | 737,594 | $9,419 | $20.32 | $8.49 - $24.40 |
| Q4 2019 | 657,394 | $15,777 | $24.60 | $23.10 - $26.46 |
| Q3 2019 | 484,598 | $11,533 | $23.51 | $21.48 - $24.50 |
| Q2 2019 | 496,881 | $11,851 | $23.29 | $22.22 - $24.50 |
| Q1 2019 | 459,710 | $10,440 | $23.58 | $21.64 - $25.29 |
| Q4 2018 | 459,710 | $11,350 | $24.99 | $19.49 - $27.84 |
| Q3 2018 | 475,513 | $12,768 | $27.20 | $24.40 - $29.90 |
| Q2 2018 | 544,513 | $15,056 | $26.87 | $24.05 - $28.95 |
| Q1 2018 | 544,513 | $14,076 | $24.78 | $23.10 - $26.55 |
| Q4 2017 | 594,513 | $14,327,763 | $23.73 | $20.35 - $24.60 |
| Q3 2017 | 594,513 | $14,328 | $22.68 | $20.25 - $24.15 |
| Q2 2017 | 594,513 | $13,614 | $22.44 | $21.27 - $23.75 |
| Q1 2017 | 521,313 | $11,417 | $20.29 | $18.31 - $22.50 |
| Q4 2016 | 446,734 | $8,332 | $17.15 | $15.40 - $19.70 |
| Q3 2016 | 397,948 | $6,109 | $15.43 | $15.00 - $16.46 |
| Q2 2016 | 277,948 | $4,275 | $15.36 | $14.61 - $16.48 |
| Q1 2016 | 277,948 | $4,077 | $15.37 | $13.63 - $17.63 |
| Q4 2015 | 277,948 | $4,892 | $16.65 | $15.39 - $18.00 |
| Q3 2015 | 272,748 | $4,225 | $15.58 | $14.95 - $16.52 |
| Q2 2015 | 265,000 | $4,028 | $15.62 | $14.65 - $17.20 |
| Q1 2015 | 250,000 | $4,275 | $14.89 | $13.35 - $17.42 |
| Q4 2014 | 250,000 | $3,463 | $13.63 | $13.00 - $15.00 |
| Q3 2014 | 250,000 | $3,325 | $13.94 | $13.06 - $19.00 |
| Q2 2014 | 250,000 | $3,500 | — | — |