Ticker: IOSP CUSIP: 45768S105 Class: Common Stock
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 104,639 | $8,009 | $75.03 | $70.10 - $79.81 |
| Q3 2025 | 80,845 | $6,238 | $82.49 | $73.21 - $89.37 |
| Q2 2025 | 223,763 | $18,816 | $86.03 | $78.60 - $94.32 |
| Q1 2025 | 249,877 | $23,676 | $103.54 | $91.98 - $114.58 |
| Q4 2024 | 452,159 | $49,765 | $111.62 | $104.73 - $124.78 |
| Q3 2024 | 488,992 | $55,300 | $113.17 | $101.07 - $129.81 |
| Q2 2024 | 394,129 | $48,710 | $121.30 | $115.10 - $129.23 |
| Q1 2024 | 410,140 | $52,883 | $117.37 | $110.33 - $126.78 |
| Q4 2023 | 287,050 | $35,376 | $102.52 | $91.88 - $121.65 |
| Q3 2023 | 143,109 | $14,626 | $100.32 | $93.27 - $107.44 |
| Q2 2023 | 171,204 | $17,196 | $95.78 | $88.08 - $103.21 |
| Q1 2023 | 173,945 | $17,859 | $102.60 | $90.19 - $110.59 |
| Q4 2022 | 168,903 | $17,373 | $96.50 | $78.79 - $110.27 |
| Q3 2022 | 171,163 | $14,663 | $89.51 | $80.19 - $98.62 |
| Q2 2022 | 130,094 | $12,461 | $91.85 | $81.71 - $101.29 |
| Q1 2022 | 157,801 | $14,605 | $89.19 | $83.58 - $94.67 |
| Q4 2021 | 163,992 | $14,816 | $82.93 | $76.29 - $89.94 |
| Q3 2021 | 186,556 | $15,712 | $83.46 | $75.85 - $90.38 |
| Q2 2021 | 239,458 | $21,698 | $92.53 | $83.80 - $100.29 |
| Q1 2021 | 119,409 | $12,262 | $92.10 | $80.91 - $99.72 |
| Q4 2020 | 70,758 | $6,420 | $71.95 | $57.19 - $85.43 |
| Q3 2020 | 80,637 | $5,106 | $68.67 | $56.85 - $78.17 |
| Q2 2020 | 97,147 | $7,505 | $67.35 | $57.02 - $79.77 |
| Q1 2020 | 280,111 | $19,465 | $83.79 | $52.02 - $98.93 |
| Q4 2019 | 207,869 | $21,502 | $87.47 | $77.84 - $97.70 |
| Q3 2019 | 150,786 | $13,441 | $81.78 | $74.31 - $88.66 |
| Q2 2019 | 118,353 | $10,798 | $76.63 | $71.16 - $83.47 |
| Q1 2019 | 108,933 | $9,080 | $67.58 | $51.63 - $78.46 |
| Q4 2018 | 108,367 | $6,693 | $62.18 | $48.12 - $70.66 |
| Q3 2018 | 71,848 | $5,514 | $70.20 | $64.67 - $74.99 |
| Q2 2018 | 102,375 | $7,837 | $67.39 | $59.37 - $73.05 |
| Q1 2018 | 106,342 | $7,295 | $62.31 | $55.67 - $66.49 |
| Q4 2017 | 55,279 | $3,903 | $59.54 | $53.90 - $66.58 |
| Q3 2017 | 87,116 | $5,370 | $53.37 | $48.20 - $59.20 |
| Q2 2017 | 123,659 | $8,106 | $57.04 | $53.20 - $62.50 |
| Q1 2017 | 144,799 | $9,375 | $59.26 | $51.41 - $66.19 |
| Q4 2016 | 261,475 | $17,912 | $56.82 | $47.94 - $64.99 |
| Q3 2016 | 116,365 | $7,076 | $48.99 | $39.67 - $53.81 |
| Q2 2016 | 150,634 | $6,928 | $41.52 | $37.19 - $44.47 |
| Q1 2016 | 124,268 | $5,389 | $40.40 | $36.39 - $46.84 |
| Q4 2015 | 111,779 | $6,070 | $48.12 | $40.31 - $52.05 |
| Q3 2015 | 102,955 | $4,788 | $39.87 | $35.73 - $44.30 |
| Q2 2015 | 63,917 | $2,879 | $38.87 | $36.94 - $40.69 |
| Q1 2015 | 41,769 | $1,938 | $37.07 | $33.21 - $40.57 |
| Q4 2014 | 49,234 | $2,102 | $35.30 | $30.04 - $40.52 |
| Q3 2014 | 13,698 | $492 | $34.84 | $30.82 - $37.97 |
| Q2 2014 | 13,227 | $571 | $36.87 | $34.10 - $39.69 |
| Q1 2014 | 13,288 | $601 | $37.58 | $34.73 - $40.51 |
| Q4 2013 | 99,342 | $4,592 | $38.90 | $36.04 - $42.14 |
| Q3 2013 | 89,121 | $4,158 | $36.35 | $33.62 - $39.43 |
| Q2 2013 | 50,923 | $2,046 | $35.20 | $33.13 - $38.11 |