Ticker: IOSP CUSIP: 45768S105 Class: Common Stock
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 23,800 | $1,822 | $75.03 | $70.10 - $79.81 |
| Q3 2025 | 23,063 | $1,780 | $82.49 | $73.21 - $89.37 |
| Q2 2025 | 23,062 | $1,939 | $86.03 | $78.60 - $94.32 |
| Q1 2025 | 22,883 | $2,168 | $103.54 | $91.98 - $114.58 |
| Q4 2024 | 23,322 | $2,567 | $111.62 | $104.73 - $124.78 |
| Q3 2024 | 23,586 | $2,667 | $113.17 | $101.07 - $129.81 |
| Q2 2024 | 24,269 | $2,999 | $121.30 | $115.10 - $129.23 |
| Q1 2024 | 24,873 | $3,207 | $117.37 | $110.33 - $126.78 |
| Q4 2023 | 26,334 | $3,245 | $102.52 | $91.88 - $121.65 |
| Q3 2023 | 27,492 | $2,810 | $100.32 | $93.27 - $107.44 |
| Q2 2023 | 30,255 | $3,039 | $95.78 | $88.08 - $103.21 |
| Q1 2023 | 30,969 | $3,180 | $102.60 | $90.19 - $110.59 |
| Q4 2022 | 31,456 | $3,236 | $96.50 | $78.79 - $110.27 |
| Q3 2022 | 31,132 | $2,667 | $89.51 | $80.19 - $98.62 |
| Q2 2022 | 31,779 | $3,044 | $91.85 | $81.71 - $101.29 |
| Q1 2022 | 31,412 | $2,907 | $89.19 | $83.58 - $94.67 |
| Q4 2021 | 34,220 | $3,091 | $82.93 | $76.29 - $89.94 |
| Q3 2021 | 33,426 | $2,815 | $83.46 | $75.85 - $90.38 |
| Q2 2021 | 33,802 | $3,063 | $92.53 | $83.80 - $100.29 |
| Q1 2021 | 36,964 | $3,796 | $92.10 | $80.91 - $99.72 |
| Q4 2020 | 36,949 | $3,352 | $71.95 | $57.19 - $85.43 |
| Q3 2020 | 36,949 | $2,340 | $68.67 | $56.85 - $78.17 |
| Q2 2020 | 36,949 | $2,854 | $67.35 | $57.02 - $79.77 |
| Q1 2020 | 36,949 | $2,568 | $83.79 | $52.02 - $98.93 |
| Q4 2019 | 37,132 | $3,841 | $87.47 | $77.84 - $97.70 |
| Q3 2019 | 37,882 | $3,377 | $81.78 | $74.31 - $88.66 |
| Q2 2019 | 37,412 | $3,413 | $76.63 | $71.16 - $83.47 |
| Q1 2019 | 37,111 | $3,093 | $67.58 | $51.63 - $78.46 |
| Q4 2018 | 37,937 | $2,343 | $62.18 | $48.12 - $70.66 |
| Q3 2018 | 37,092 | $2,847 | $70.20 | $64.67 - $74.99 |
| Q2 2018 | 37,094 | $2,840 | $67.39 | $59.37 - $73.05 |
| Q1 2018 | 36,508 | $2,504 | $62.31 | $55.67 - $66.49 |
| Q4 2017 | 37,788 | $2,668 | $59.54 | $53.90 - $66.58 |
| Q3 2017 | 38,364 | $2,365 | $53.37 | $48.20 - $59.20 |
| Q2 2017 | 42,442 | $2,782 | $57.04 | $53.20 - $62.50 |
| Q1 2017 | 46,521 | $3,012 | $59.26 | $51.41 - $66.19 |
| Q4 2016 | 48,721 | $3,337 | $56.82 | $47.94 - $64.99 |
| Q3 2016 | 50,021 | $3,042 | $48.99 | $39.67 - $53.81 |
| Q2 2016 | 49,521 | $2,277 | $41.52 | $37.19 - $44.47 |
| Q1 2016 | 51,535 | $2,235 | $40.40 | $36.39 - $46.84 |
| Q4 2015 | 44,871 | $2,437 | $48.12 | $40.31 - $52.05 |
| Q3 2015 | 44,171 | $2,054 | $39.87 | $35.73 - $44.30 |
| Q2 2015 | 44,271 | $1,994 | $38.87 | $36.94 - $40.69 |
| Q1 2015 | 44,671 | $2,072 | $37.07 | $33.21 - $40.57 |
| Q4 2014 | 45,471 | $1,942 | $35.30 | $30.04 - $40.52 |
| Q3 2014 | 44,979 | $1,615 | $34.84 | $30.82 - $37.97 |
| Q2 2014 | 44,523 | $1,922 | $36.87 | $34.10 - $39.69 |
| Q1 2014 | 42,723 | $1,932 | $37.58 | $34.73 - $40.51 |
| Q4 2013 | 42,523 | $1,965 | $38.90 | $36.04 - $42.14 |
| Q3 2013 | 42,223 | $1,970 | $36.35 | $33.62 - $39.43 |
| Q2 2013 | 40,951 | $1,645 | $35.20 | $33.13 - $38.11 |
| Q1 2013 | 40,141 | $1,777 | $34.25 | $29.32 - $37.57 |