Ticker: IOSP CUSIP: 45768S105 Class: Common Stock
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 35,091 | $2,686 | $75.03 | $70.10 - $79.81 |
| Q3 2025 | 33,891 | $2,615 | $82.49 | $73.21 - $89.37 |
| Q2 2025 | 48,246 | $4,057 | $86.03 | $78.60 - $94.32 |
| Q1 2025 | 53,216 | $5,042 | $103.54 | $91.98 - $114.58 |
| Q4 2024 | 55,702 | $6,131 | $111.62 | $104.73 - $124.78 |
| Q3 2024 | 52,006 | $5,881 | $113.17 | $101.07 - $129.81 |
| Q2 2024 | 53,246 | $6,581 | $121.30 | $115.10 - $129.23 |
| Q1 2024 | 59,360 | $7,654 | $117.37 | $110.33 - $126.78 |
| Q4 2023 | 60,061 | $7,402 | $102.52 | $91.88 - $121.65 |
| Q3 2023 | 60,430 | $6,176 | $100.32 | $93.27 - $107.44 |
| Q2 2023 | 62,465 | $6,274 | $95.78 | $88.08 - $103.21 |
| Q1 2023 | 54,233 | $5,568 | $102.60 | $90.19 - $110.59 |
| Q4 2022 | 50,382 | $5,182 | $96.50 | $78.79 - $110.27 |
| Q3 2022 | 52,901 | $4,532 | $89.51 | $80.19 - $98.62 |
| Q2 2022 | 87,783 | $8,409 | $91.85 | $81.71 - $101.29 |
| Q1 2022 | 130,326 | $12,061 | $89.19 | $83.58 - $94.67 |
| Q4 2021 | 132,998 | $12,015 | $82.93 | $76.29 - $89.94 |
| Q3 2021 | 2,452,830 | $206,577 | $83.46 | $75.85 - $90.38 |
| Q2 2021 | 2,315,802 | $209,835 | $92.53 | $83.80 - $100.29 |
| Q1 2021 | 2,198,388 | $225,753 | $92.10 | $80.91 - $99.72 |
| Q4 2020 | 2,105,411 | $191,025 | $71.95 | $57.19 - $85.43 |
| Q3 2020 | 1,869,548 | $118,380 | $68.67 | $56.85 - $78.17 |
| Q2 2020 | 1,674,147 | $129,329 | $67.35 | $57.02 - $79.77 |
| Q1 2020 | 1,473,190 | $102,372 | $83.79 | $52.02 - $98.93 |
| Q4 2019 | 1,295,840 | $134,041 | $87.47 | $77.84 - $97.70 |
| Q3 2019 | 1,270,846 | $113,283 | $81.78 | $74.31 - $88.66 |
| Q2 2019 | 1,220,629 | $111,370 | $76.63 | $71.16 - $83.47 |
| Q1 2019 | 1,181,668 | $98,491 | $67.58 | $51.63 - $78.46 |
| Q4 2018 | 1,188,041 | $73,374 | $62.18 | $48.12 - $70.66 |
| Q3 2018 | 1,162,551 | $89,226 | $70.20 | $64.67 - $74.99 |
| Q2 2018 | 1,098,161 | $84,064 | $67.39 | $59.37 - $73.05 |
| Q1 2018 | 1,134,315 | $77,815 | $62.31 | $55.67 - $66.49 |
| Q4 2017 | 1,085,422 | $76,630 | $59.54 | $53.90 - $66.58 |
| Q3 2017 | 1,063,714 | $65,578 | $53.37 | $48.20 - $59.20 |
| Q2 2017 | 946,319 | $62,031 | $57.04 | $53.20 - $62.50 |
| Q1 2017 | 892,271 | $57,776 | $59.26 | $51.41 - $66.19 |
| Q4 2016 | 718,985 | $49,250 | $56.82 | $47.94 - $64.99 |
| Q3 2016 | 736,263 | $44,772 | $48.99 | $39.67 - $53.81 |
| Q2 2016 | 810,066 | $37,254 | $41.52 | $37.19 - $44.47 |
| Q1 2016 | 617,203 | $26,763 | $40.40 | $36.39 - $46.84 |
| Q4 2015 | 409,048 | $22,216 | $48.12 | $40.31 - $52.05 |
| Q3 2015 | 521,853 | $24,271 | $39.87 | $35.73 - $44.30 |
| Q2 2015 | 653,926 | $29,452 | $38.87 | $36.94 - $40.69 |
| Q1 2015 | 614,247 | $28,495 | $37.07 | $33.21 - $40.57 |
| Q4 2014 | 424,944 | $18,145 | $35.30 | $30.04 - $40.52 |
| Q3 2014 | 449,139 | $16,124 | $34.84 | $30.82 - $37.97 |
| Q2 2014 | 389,815 | $16,829 | $36.87 | $34.10 - $39.69 |
| Q1 2014 | 285,948 | $12,933 | $37.58 | $34.73 - $40.51 |
| Q4 2013 | 239,291 | $11,060 | $38.90 | $36.04 - $42.14 |
| Q3 2013 | 150,888 | $7,041 | $36.35 | $33.62 - $39.43 |
| Q2 2013 | 150,680 | $6,053 | $35.20 | $33.13 - $38.11 |