Ticker: IOSP CUSIP: 45768S105 Class: Common Stock
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 26,923 | $2,061 | $75.03 | $70.10 - $79.81 |
| Q3 2025 | 27,223 | $2,101 | $82.49 | $73.21 - $89.37 |
| Q2 2025 | 27,223 | $2,289 | $86.03 | $78.60 - $94.32 |
| Q1 2025 | 28,353 | $2,686 | $103.54 | $91.98 - $114.58 |
| Q4 2024 | 28,353 | $3,121 | $111.62 | $104.73 - $124.78 |
| Q3 2024 | 28,123 | $3,180 | $113.17 | $101.07 - $129.81 |
| Q2 2024 | 28,161 | $3,480 | $121.30 | $115.10 - $129.23 |
| Q1 2024 | 28,221 | $3,639 | $117.37 | $110.33 - $126.78 |
| Q4 2023 | 28,671 | $3,533 | $102.52 | $91.88 - $121.65 |
| Q3 2023 | 29,191 | $2,983 | $100.32 | $93.27 - $107.44 |
| Q2 2023 | 29,191 | $2,932 | $95.78 | $88.08 - $103.21 |
| Q1 2023 | 196,917 | $20,217 | $102.60 | $90.19 - $110.59 |
| Q4 2022 | 655,047 | $67,378 | $96.50 | $78.79 - $110.27 |
| Q3 2022 | 858,179 | $73,520 | $89.51 | $80.19 - $98.62 |
| Q2 2022 | 905,256 | $86,714 | $91.85 | $81.71 - $101.29 |
| Q1 2022 | 916,898 | $84,859 | $89.19 | $83.58 - $94.67 |
| Q4 2021 | 938,686 | $84,801 | $82.93 | $76.29 - $89.94 |
| Q3 2021 | 972,962 | $81,943 | $83.46 | $75.85 - $90.38 |
| Q2 2021 | 867,436 | $78,598 | $92.53 | $83.80 - $100.29 |
| Q1 2021 | 773,512 | $79,432 | $92.10 | $80.91 - $99.72 |
| Q4 2020 | 617,685 | $56,043 | $71.95 | $57.19 - $85.43 |
| Q3 2020 | 37,260 | $2,359 | $68.67 | $56.85 - $78.17 |
| Q2 2020 | 38,516 | $2,975 | $67.35 | $57.02 - $79.77 |
| Q1 2020 | 36,728 | $2,552 | $83.79 | $52.02 - $98.93 |
| Q4 2019 | 36,178 | $3,742 | $87.47 | $77.84 - $97.70 |
| Q3 2019 | 36,800 | $3,280 | $81.78 | $74.31 - $88.66 |
| Q2 2019 | 41,750 | $3,809 | $76.63 | $71.16 - $83.47 |
| Q1 2019 | 29,950 | $2,496 | $67.58 | $51.63 - $78.46 |
| Q4 2018 | 29,650 | $1,831 | $62.18 | $48.12 - $70.66 |
| Q3 2018 | 29,650 | $2,276 | $70.20 | $64.67 - $74.99 |
| Q2 2018 | 29,650 | $2,270 | $67.39 | $59.37 - $73.05 |
| Q1 2018 | 29,650 | $2,034 | $62.31 | $55.67 - $66.49 |
| Q4 2017 | 29,650 | $2,093 | $59.54 | $53.90 - $66.58 |
| Q3 2017 | 47,320 | $2,917 | $53.37 | $48.20 - $59.20 |
| Q2 2017 | 29,650 | $1,944 | $57.04 | $53.20 - $62.50 |
| Q1 2017 | 33,450 | $2,166 | $59.26 | $51.41 - $66.19 |
| Q4 2016 | 64,200 | $4,398 | $56.82 | $47.94 - $64.99 |
| Q3 2016 | 33,450 | $2,034 | $48.99 | $39.67 - $53.81 |
| Q2 2016 | 38,150 | $1,755 | $41.52 | $37.19 - $44.47 |
| Q1 2016 | 38,150 | $1,654 | $40.40 | $36.39 - $46.84 |
| Q4 2015 | 38,370 | $2,084 | $48.12 | $40.31 - $52.05 |
| Q3 2015 | 39,450 | $1,835 | $39.87 | $35.73 - $44.30 |
| Q2 2015 | 39,500 | $1,779 | $38.87 | $36.94 - $40.69 |
| Q1 2015 | 41,400 | $1,921 | $37.07 | $33.21 - $40.57 |
| Q4 2014 | 42,500 | $1,815 | $35.30 | $30.04 - $40.52 |
| Q3 2014 | 42,500 | $1,526 | $34.84 | $30.82 - $37.97 |
| Q2 2014 | 42,500 | $1,835 | $36.87 | $34.10 - $39.69 |
| Q1 2014 | 42,500 | $1,922 | $37.58 | $34.73 - $40.51 |
| Q4 2013 | 42,500 | $1,964 | $38.90 | $36.04 - $42.14 |
| Q3 2013 | 44,763 | $2,089 | $36.35 | $33.62 - $39.43 |
| Q2 2013 | 43,575 | $1,751 | $35.20 | $33.13 - $38.11 |