Ticker: IOSP CUSIP: 45768S105 Class: Common Stock
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 22,548 | $1,726 | $75.03 | $70.10 - $79.81 |
| Q3 2025 | 22,548 | $1,740 | $82.49 | $73.21 - $89.37 |
| Q2 2025 | 20,148 | $1,694 | $86.03 | $78.60 - $94.32 |
| Q1 2025 | 68,935 | $6,532 | $103.54 | $91.98 - $114.58 |
| Q4 2024 | 49,135 | $5,408 | $111.62 | $104.73 - $124.78 |
| Q3 2024 | 46,235 | $5,229 | $113.17 | $101.07 - $129.81 |
| Q2 2024 | 37,835 | $4,676 | $121.30 | $115.10 - $129.23 |
| Q1 2024 | 45,537 | $5,872 | $117.37 | $110.33 - $126.78 |
| Q4 2023 | 56,786 | $6,998 | $102.52 | $91.88 - $121.65 |
| Q3 2023 | 83,333 | $8,517 | $100.32 | $93.27 - $107.44 |
| Q2 2023 | 88,462 | $8,885 | $95.78 | $88.08 - $103.21 |
| Q1 2023 | 81,262 | $8,343 | $102.60 | $90.19 - $110.59 |
| Q4 2022 | 96,962 | $9,974 | $96.50 | $78.79 - $110.27 |
| Q3 2022 | 125,026 | $10,711 | $89.51 | $80.19 - $98.62 |
| Q2 2022 | 117,288 | $11,235 | $91.85 | $81.71 - $101.29 |
| Q1 2022 | 139,691 | $12,928 | $89.19 | $83.58 - $94.67 |
| Q4 2021 | 152,400 | $13,768 | $82.93 | $76.29 - $89.94 |
| Q3 2021 | 136,107 | $11,463 | $83.46 | $75.85 - $90.38 |
| Q2 2021 | 108,131 | $9,798 | $92.53 | $83.80 - $100.29 |
| Q1 2021 | 86,429 | $8,875 | $92.10 | $80.91 - $99.72 |
| Q4 2020 | 62,861 | $5,703 | $71.95 | $57.19 - $85.43 |
| Q3 2020 | 43,870 | $2,778 | $68.67 | $56.85 - $78.17 |
| Q2 2020 | 82,016 | $6,336 | $67.35 | $57.02 - $79.77 |
| Q1 2020 | 23,992 | $1,667 | $83.79 | $52.02 - $98.93 |
| Q4 2019 | 85,706 | $8,865 | $87.47 | $77.84 - $97.70 |
| Q3 2019 | 133,995 | $11,944 | $81.78 | $74.31 - $88.66 |
| Q2 2019 | 168,439 | $15,368 | $76.63 | $71.16 - $83.47 |
| Q1 2019 | 201,598 | $16,803 | $67.58 | $51.63 - $78.46 |
| Q4 2018 | 393,553 | $24,306 | $62.18 | $48.12 - $70.66 |
| Q3 2018 | 455,731 | $34,977 | $70.20 | $64.67 - $74.99 |
| Q2 2018 | 606,820 | $46,452 | $67.39 | $59.37 - $73.05 |
| Q1 2018 | 735,251 | $50,438 | $62.31 | $55.67 - $66.49 |
| Q4 2017 | 759,293 | $53,606 | $59.54 | $53.90 - $66.58 |
| Q3 2017 | 877,432 | $54,094 | $53.37 | $48.20 - $59.20 |
| Q2 2017 | 836,775 | $54,851 | $57.04 | $53.20 - $62.50 |
| Q1 2017 | 815,751 | $52,820 | $59.26 | $51.41 - $66.19 |
| Q4 2016 | 1,261,751 | $86,430 | $56.82 | $47.94 - $64.99 |
| Q3 2016 | 1,332,071 | $81,003 | $48.99 | $39.67 - $53.81 |
| Q2 2016 | 1,527,422 | $70,246 | $41.52 | $37.19 - $44.47 |
| Q1 2016 | 1,350,071 | $58,539 | $40.40 | $36.39 - $46.84 |
| Q4 2015 | 1,843,884 | $100,141 | $48.12 | $40.31 - $52.05 |
| Q3 2015 | 1,996,348 | $92,853 | $39.87 | $35.73 - $44.30 |
| Q2 2015 | 1,693,051 | $76,255 | $38.87 | $36.94 - $40.69 |
| Q1 2015 | 1,496,672 | $69,430 | $37.07 | $33.21 - $40.57 |
| Q4 2014 | 1,452,330 | $62,012 | $35.30 | $30.04 - $40.52 |
| Q3 2014 | 1,415,708 | $50,825 | $34.84 | $30.82 - $37.97 |
| Q2 2014 | 1,250,118 | $53,970 | $36.87 | $34.10 - $39.69 |
| Q1 2014 | 1,228,818 | $55,581 | $37.58 | $34.73 - $40.51 |
| Q4 2013 | 1,189,582 | $54,983 | $38.90 | $36.04 - $42.14 |
| Q3 2013 | 1,084,902 | $50,620 | $36.35 | $33.62 - $39.43 |
| Q2 2013 | 1,003,471 | $40,321 | $35.20 | $33.13 - $38.11 |