Ticker: ISTR CUSIP: 46134L105 Class: Common Stock
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 172,138 | $4,600 | $24.59 | $21.43 - $27.95 |
| Q3 2025 | 248,853 | $5,776 | $22.44 | $19.17 - $23.70 |
| Q2 2025 | 258,153 | $4,988 | $18.45 | $15.39 - $20.38 |
| Q1 2025 | 258,153 | $4,546 | $18.75 | $16.70 - $22.05 |
| Q4 2024 | 254,000 | $5,578 | $21.91 | $18.17 - $24.80 |
| Q3 2024 | 259,600 | $5,036 | $17.59 | $14.91 - $19.96 |
| Q2 2024 | 264,600 | $4,075 | $15.81 | $14.60 - $16.97 |
| Q1 2024 | 268,400 | $4,391 | $16.49 | $14.82 - $17.99 |
| Q4 2023 | 280,000 | $4,175 | $11.37 | $9.07 - $15.19 |
| Q3 2023 | 275,000 | $2,912 | $12.85 | $10.47 - $15.63 |
| Q2 2023 | 275,000 | $3,330 | $12.26 | $10.71 - $15.63 |
| Q1 2023 | 298,000 | $4,160 | $19.27 | $13.50 - $22.20 |
| Q4 2022 | 302,716 | $6,517 | $21.45 | $19.75 - $22.48 |
| Q3 2022 | 305,000 | $6,070 | $21.80 | $19.90 - $23.72 |
| Q2 2022 | 387,500 | $8,486 | $20.48 | $18.62 - $23.23 |
| Q1 2022 | 491,000 | $9,373 | $19.36 | $18.07 - $20.45 |
| Q4 2021 | 491,000 | $9,039 | $18.74 | $17.07 - $22.47 |
| Q3 2021 | 488,300 | $10,752 | $22.22 | $21.08 - $23.51 |
| Q2 2021 | 489,431 | $11,203 | $22.09 | $20.30 - $23.69 |
| Q1 2021 | 639,555 | $13,143 | $18.78 | $15.66 - $23.45 |
| Q4 2020 | 685,797 | $11,343 | $15.38 | $12.51 - $17.39 |
| Q3 2020 | 740,661 | $9,495 | $13.65 | $12.35 - $15.21 |
| Q1 2020 | 781,068 | $9,974 | $20.32 | $8.49 - $24.40 |
| Q4 2019 | 781,904 | $18,466 | $24.60 | $23.10 - $26.46 |
| Q3 2019 | 532,678 | $12,678 | $23.51 | $21.48 - $24.50 |
| Q2 2019 | 354,548 | $8,456 | $23.29 | $22.22 - $24.50 |
| Q1 2019 | 220,000 | $4,996 | $23.58 | $21.64 - $25.29 |
| Q4 2018 | 179,435 | $4,450 | $24.99 | $19.49 - $27.84 |
| Q3 2018 | 157,900 | $4,240 | $27.20 | $24.40 - $29.90 |
| Q2 2018 | 160,000 | $4,424 | $26.87 | $24.05 - $28.95 |
| Q1 2018 | 209,001 | $5,403 | $24.78 | $23.10 - $26.55 |
| Q4 2017 | 185,000 | $4,459 | $23.73 | $20.35 - $24.60 |
| Q3 2017 | 113,200 | $2,728 | $22.68 | $20.25 - $24.15 |
| Q2 2017 | 94,700 | $2,169 | $22.44 | $21.27 - $23.75 |
| Q1 2017 | 305,000 | $6,680 | $20.29 | $18.31 - $22.50 |
| Q4 2016 | 403,222 | $7,520 | $17.15 | $15.40 - $19.70 |
| Q3 2016 | 398,122 | $6,111 | $15.43 | $15.00 - $16.46 |
| Q2 2016 | 302,800 | $4,657 | $15.36 | $14.61 - $16.48 |
| Q1 2016 | 300,100 | $4,402 | $15.37 | $13.63 - $17.63 |
| Q4 2015 | 249,700 | $4,395 | $16.65 | $15.39 - $18.00 |
| Q3 2015 | 250,000 | $3,873 | $15.58 | $14.95 - $16.52 |
| Q2 2015 | 234,400 | $3,563 | $15.62 | $14.65 - $17.20 |
| Q1 2015 | 234,600 | $4,012 | $14.89 | $13.35 - $17.42 |
| Q4 2014 | 313,300 | $4,339 | $13.63 | $13.00 - $15.00 |
| Q3 2014 | 320,800 | $4,267 | $13.94 | $13.06 - $19.00 |