Ticker: IOSP CUSIP: 45768S105 Class: Common Stock
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 23,464 | $1,796 | $75.03 | $70.10 - $79.81 |
| Q3 2025 | 25,159 | $1,941 | $82.49 | $73.21 - $89.37 |
| Q2 2025 | 26,049 | $3,046 | $86.03 | $78.60 - $94.32 |
| Q1 2025 | 24,399 | $2,899 | $103.54 | $91.98 - $114.58 |
| Q4 2024 | 25,369 | $3,020 | $111.62 | $104.73 - $124.78 |
| Q3 2024 | 25,701 | $2,907 | $113.17 | $101.07 - $129.81 |
| Q2 2024 | 26,623 | $3,290 | $121.30 | $115.10 - $129.23 |
| Q1 2024 | 27,784 | $3,582 | $117.37 | $110.33 - $126.78 |
| Q4 2023 | 28,744 | $3,542 | $102.52 | $91.88 - $121.65 |
| Q3 2023 | 29,102 | $2,974 | $100.32 | $93.27 - $107.44 |
| Q2 2023 | 30,817 | $3,095 | $95.78 | $88.08 - $103.21 |
| Q1 2023 | 24,248 | $2,490 | $102.60 | $90.19 - $110.59 |
| Q4 2022 | 24,983 | $2,570 | $96.50 | $78.79 - $110.27 |
| Q3 2022 | 25,093 | $2,150 | $89.51 | $80.19 - $98.62 |
| Q2 2022 | 32,558 | $3,118 | $91.85 | $81.71 - $101.29 |
| Q1 2022 | 35,323 | $3,269 | $89.19 | $83.58 - $94.67 |
| Q4 2021 | 37,324 | $3,372 | $82.93 | $76.29 - $89.94 |
| Q3 2021 | 27,012 | $2,275 | $83.46 | $75.85 - $90.38 |
| Q2 2021 | 27,245 | $2,469 | $92.53 | $83.80 - $100.29 |
| Q1 2021 | 28,902 | $2,968 | $92.10 | $80.91 - $99.72 |
| Q4 2020 | 34,062 | $3,091 | $71.95 | $57.19 - $85.43 |
| Q3 2020 | 36,222 | $2,294 | $68.67 | $56.85 - $78.17 |
| Q2 2020 | 38,210 | $2,952 | $67.35 | $57.02 - $79.77 |
| Q1 2020 | 47,383 | $3,293 | $83.79 | $52.02 - $98.93 |
| Q4 2019 | 48,193 | $4,985 | $87.47 | $77.84 - $97.70 |
| Q3 2019 | 58,806 | $5,242 | $81.78 | $74.31 - $88.66 |
| Q2 2019 | 78,905 | $7,200 | $76.63 | $71.16 - $83.47 |
| Q1 2019 | 71,369 | $5,949 | $67.58 | $51.63 - $78.46 |
| Q4 2018 | 41,305 | $2,551 | $62.18 | $48.12 - $70.66 |
| Q3 2018 | 41,026 | $3,149 | $70.20 | $64.67 - $74.99 |
| Q2 2018 | 41,666 | $3,190 | $67.39 | $59.37 - $73.05 |
| Q1 2018 | 42,186 | $2,894 | $62.31 | $55.67 - $66.49 |
| Q4 2017 | 41,786 | $2,950 | $59.54 | $53.90 - $66.58 |
| Q3 2017 | 45,876 | $2,828 | $53.37 | $48.20 - $59.20 |
| Q2 2017 | 45,380 | $2,975 | $57.04 | $53.20 - $62.50 |
| Q1 2017 | 44,540 | $2,884 | $59.26 | $51.41 - $66.19 |
| Q4 2016 | 52,670 | $3,608 | $56.82 | $47.94 - $64.99 |
| Q3 2016 | 161,250 | $9,806 | $48.99 | $39.67 - $53.81 |
| Q2 2016 | 158,170 | $7,274 | $41.52 | $37.19 - $44.47 |
| Q1 2016 | 177,040 | $7,676 | $40.40 | $36.39 - $46.84 |
| Q4 2015 | 230,940 | $12,542 | $48.12 | $40.31 - $52.05 |
| Q3 2015 | 219,300 | $10,200 | $39.87 | $35.73 - $44.30 |
| Q2 2015 | 165,600 | $7,459 | $38.87 | $36.94 - $40.69 |
| Q1 2015 | 165,600 | $7,682 | $37.07 | $33.21 - $40.57 |
| Q4 2014 | 21,360 | $912 | $35.30 | $30.04 - $40.52 |
| Q2 2014 | 5,778 | $249 | $36.87 | $34.10 - $39.69 |