Ticker: IOSP CUSIP: 45768S105 Class: Common Stock
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 137,828 | $10,549 | $75.03 | $70.10 - $79.81 |
| Q3 2025 | 215,185 | $16,604 | $82.49 | $73.21 - $89.37 |
| Q2 2025 | 231,007 | $19,425 | $86.03 | $78.60 - $94.32 |
| Q1 2025 | 228,739 | $21,673 | $103.54 | $91.98 - $114.58 |
| Q4 2024 | 237,616 | $26,152 | $111.62 | $104.73 - $124.78 |
| Q3 2024 | 234,983 | $26,574 | $113.17 | $101.07 - $129.81 |
| Q2 2024 | 258,294 | $31,923 | $121.30 | $115.10 - $129.23 |
| Q1 2024 | 252,146 | $32,512 | $117.37 | $110.33 - $126.78 |
| Q4 2023 | 263,055 | $32,419 | $102.52 | $91.88 - $121.65 |
| Q3 2023 | 263,452 | $26,925 | $100.32 | $93.27 - $107.44 |
| Q2 2023 | 290,754 | $29,203 | $95.78 | $88.08 - $103.21 |
| Q1 2023 | 278,494 | $28,593 | $102.60 | $90.19 - $110.59 |
| Q4 2022 | 282,204 | $29,027 | $96.50 | $78.79 - $110.27 |
| Q3 2022 | 293,694 | $25,161 | $89.51 | $80.19 - $98.62 |
| Q2 2022 | 290,248 | $27,802 | $91.85 | $81.71 - $101.29 |
| Q1 2022 | 305,809 | $28,302 | $89.19 | $83.58 - $94.67 |
| Q4 2021 | 300,171 | $27,116 | $82.93 | $76.29 - $89.94 |
| Q3 2021 | 315,288 | $26,554 | $83.46 | $75.85 - $90.38 |
| Q2 2021 | 309,962 | $28,085 | $92.53 | $83.80 - $100.29 |
| Q1 2021 | 305,617 | $31,383 | $92.10 | $80.91 - $99.72 |
| Q4 2020 | 305,680 | $27,733 | $71.95 | $57.19 - $85.43 |
| Q3 2020 | 281,412 | $17,819 | $68.67 | $56.85 - $78.17 |
| Q2 2020 | 295,464 | $22,826 | $67.35 | $57.02 - $79.77 |
| Q1 2020 | 292,126 | $20,299 | $83.79 | $52.02 - $98.93 |
| Q4 2019 | 305,770 | $31,629 | $87.47 | $77.84 - $97.70 |
| Q3 2019 | 339,716 | $30,282 | $81.78 | $74.31 - $88.66 |
| Q2 2019 | 349,891 | $31,923 | $76.63 | $71.16 - $83.47 |
| Q1 2019 | 343,871 | $28,663 | $67.58 | $51.63 - $78.46 |
| Q4 2018 | 350,746 | $21,662 | $62.18 | $48.12 - $70.66 |
| Q3 2018 | 351,777 | $26,999 | $70.20 | $64.67 - $74.99 |
| Q2 2018 | 339,676 | $26,003 | $67.39 | $59.37 - $73.05 |
| Q1 2018 | 339,914 | $23,317 | $62.31 | $55.67 - $66.49 |
| Q4 2017 | 330,123 | $23,307 | $59.54 | $53.90 - $66.58 |
| Q3 2017 | 328,932 | $20,279 | $53.37 | $48.20 - $59.20 |
| Q2 2017 | 338,391 | $22,182 | $57.04 | $53.20 - $62.50 |
| Q1 2017 | 355,037 | $22,989 | $59.26 | $51.41 - $66.19 |
| Q4 2016 | 443,530 | $30,381 | $56.82 | $47.94 - $64.99 |
| Q3 2016 | 414,175 | $25,187 | $48.99 | $39.67 - $53.81 |
| Q2 2016 | 396,672 | $18,243 | $41.52 | $37.19 - $44.47 |
| Q1 2016 | 426,472 | $18,491 | $40.40 | $36.39 - $46.84 |
| Q4 2015 | 316,566 | $17,192 | $48.12 | $40.31 - $52.05 |
| Q3 2015 | 326,941 | $15,205 | $39.87 | $35.73 - $44.30 |
| Q2 2015 | 183,233 | $8,252 | $38.87 | $36.94 - $40.69 |
| Q1 2015 | 181,372 | $8,414 | $37.07 | $33.21 - $40.57 |
| Q4 2014 | 156,903 | $6,700 | $35.30 | $30.04 - $40.52 |
| Q3 2014 | 181,180 | $6,504 | $34.84 | $30.82 - $37.97 |
| Q2 2014 | 188,850 | $8,153 | $36.87 | $34.10 - $39.69 |
| Q1 2014 | 187,974 | $8,502 | $37.58 | $34.73 - $40.51 |
| Q4 2013 | 189,251 | $8,746 | $38.90 | $36.04 - $42.14 |
| Q3 2013 | 134,083 | $6,256 | $36.35 | $33.62 - $39.43 |
| Q2 2013 | 145,674 | $5,853 | $35.20 | $33.13 - $38.11 |