Ticker: IOSP CUSIP: 45768S105 Class: Common Stock
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 305,875 | $23,412 | $75.03 | $70.10 - $79.81 |
| Q3 2025 | 320,982 | $24,767 | $82.49 | $73.21 - $89.37 |
| Q2 2025 | 321,164 | $27,007 | $86.03 | $78.60 - $94.32 |
| Q1 2025 | 273,012 | $25,868 | $103.54 | $91.98 - $114.58 |
| Q4 2024 | 312,880 | $34,436 | $111.62 | $104.73 - $124.78 |
| Q3 2024 | 266,688 | $30,160 | $113.17 | $101.07 - $129.81 |
| Q2 2024 | 214,048 | $26,454 | $121.30 | $115.10 - $129.23 |
| Q1 2024 | 149,203 | $19,238 | $117.37 | $110.33 - $126.78 |
| Q4 2023 | 129,900 | $16,009 | $102.52 | $91.88 - $121.65 |
| Q3 2023 | 133,334 | $13,627 | $100.32 | $93.27 - $107.44 |
| Q2 2023 | 137,825 | $13,843 | $95.78 | $88.08 - $103.21 |
| Q1 2023 | 130,188 | $13,366 | $102.60 | $90.19 - $110.59 |
| Q4 2022 | 102,042 | $10 | $96.50 | $78.79 - $110.27 |
| Q3 2022 | 98,123 | $8,406 | $89.51 | $80.19 - $98.62 |
| Q2 2022 | 96,713 | $9,264 | $91.85 | $81.71 - $101.29 |
| Q1 2022 | 104,796 | $9,699 | $89.19 | $83.58 - $94.67 |
| Q4 2021 | 97,615 | $8,817 | $82.93 | $76.29 - $89.94 |
| Q3 2021 | 99,622 | $8,391 | $83.46 | $75.85 - $90.38 |
| Q2 2021 | 109,639 | $9,934 | $92.53 | $83.80 - $100.29 |
| Q1 2021 | 134,742 | $13,837 | $92.10 | $80.91 - $99.72 |
| Q4 2020 | 74,169 | $6,729 | $71.95 | $57.19 - $85.43 |
| Q3 2020 | 69,829 | $4,399 | $68.67 | $56.85 - $78.17 |
| Q2 2020 | 79,990 | $6,179 | $67.35 | $57.02 - $79.77 |
| Q1 2020 | 63,627 | $4,421 | $83.79 | $52.02 - $98.93 |
| Q4 2019 | 51,685 | $5,346 | $87.47 | $77.84 - $97.70 |
| Q3 2019 | 74,054 | $6,600 | $81.78 | $74.31 - $88.66 |
| Q2 2019 | 57,097 | $5,037 | $76.63 | $71.16 - $83.47 |
| Q1 2019 | 39,173 | $3,265 | $67.58 | $51.63 - $78.46 |
| Q4 2018 | 69,429 | $4,288 | $62.18 | $48.12 - $70.66 |
| Q3 2018 | 67,819 | $5,206 | $70.20 | $64.67 - $74.99 |
| Q2 2018 | 94,860 | $7,261 | $67.39 | $59.37 - $73.05 |
| Q1 2018 | 57,850 | $3,968 | $62.31 | $55.67 - $66.49 |
| Q4 2017 | 57,374 | $4,050 | $59.54 | $53.90 - $66.58 |
| Q3 2017 | 75,786 | $4,649 | $53.37 | $48.20 - $59.20 |
| Q2 2017 | 136,330 | $8,936 | $57.04 | $53.20 - $62.50 |
| Q1 2017 | 253,270 | $16,399 | $59.26 | $51.41 - $66.19 |
| Q4 2016 | 250,908 | $17,188 | $56.82 | $47.94 - $64.99 |
| Q3 2016 | 288,423 | $17,539 | $48.99 | $39.67 - $53.81 |
| Q2 2016 | 265,051 | $12,190 | $41.52 | $37.19 - $44.47 |
| Q1 2016 | 126,094 | $5,468 | $40.40 | $36.39 - $46.84 |
| Q4 2015 | 198,278 | $10,768 | $48.12 | $40.31 - $52.05 |
| Q3 2015 | 43,035 | $2,001 | $39.87 | $35.73 - $44.30 |
| Q2 2015 | 21,800 | $982 | $38.87 | $36.94 - $40.69 |
| Q1 2015 | 23,800 | $1,104 | $37.07 | $33.21 - $40.57 |
| Q4 2014 | 25,800 | $1,102 | $35.30 | $30.04 - $40.52 |
| Q3 2014 | 26,497 | $951 | $34.84 | $30.82 - $37.97 |
| Q2 2014 | 26,597 | $1,148 | $36.87 | $34.10 - $39.69 |
| Q1 2014 | 26,697 | $1,208 | $37.58 | $34.73 - $40.51 |
| Q4 2013 | 34,317 | $1,586 | $38.90 | $36.04 - $42.14 |
| Q3 2013 | 45,060 | $2,102 | $36.35 | $33.62 - $39.43 |
| Q2 2013 | 33,778 | $1,357 | $35.20 | $33.13 - $38.11 |