Ticker: IOSP CUSIP: 45768S105 Class: Common Stock
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 243,535 | $18,640 | $75.03 | $70.10 - $79.81 |
| Q3 2025 | 253,753 | $19,580 | $82.49 | $73.21 - $89.37 |
| Q2 2025 | 263,835 | $22,186 | $86.03 | $78.60 - $94.32 |
| Q1 2025 | 239,195 | $22,664 | $103.54 | $91.98 - $114.58 |
| Q4 2024 | 237,877 | $26,181 | $111.62 | $104.73 - $124.78 |
| Q3 2024 | 254,754 | $28,810 | $113.17 | $101.07 - $129.81 |
| Q2 2024 | 237,477 | $29,350 | $121.30 | $115.10 - $129.23 |
| Q1 2024 | 315,175 | $40,639 | $117.37 | $110.33 - $126.78 |
| Q4 2023 | 219,406 | $27,040 | $102.52 | $91.88 - $121.65 |
| Q3 2023 | 201,101 | $20,553 | $100.32 | $93.27 - $107.44 |
| Q2 2023 | 265,108 | $26,628 | $95.78 | $88.08 - $103.21 |
| Q1 2023 | 204,698 | $21,016 | $102.60 | $90.19 - $110.59 |
| Q4 2022 | 203,277 | $20,909 | $96.50 | $78.79 - $110.27 |
| Q3 2022 | 213,722 | $18,308 | $89.51 | $80.19 - $98.62 |
| Q2 2022 | 215,065 | $20,602 | $91.85 | $81.71 - $101.29 |
| Q1 2022 | 88,278 | $8,170 | $89.19 | $83.58 - $94.67 |
| Q4 2021 | 113,001 | $10,209 | $82.93 | $76.29 - $89.94 |
| Q3 2021 | 181,283 | $15,269 | $83.46 | $75.85 - $90.38 |
| Q2 2021 | 119,379 | $10,818 | $92.53 | $83.80 - $100.29 |
| Q1 2021 | 61,934 | $6,360 | $92.10 | $80.91 - $99.72 |
| Q4 2020 | 79,129 | $7,180 | $71.95 | $57.19 - $85.43 |
| Q3 2020 | 67,011 | $4,244 | $68.67 | $56.85 - $78.17 |
| Q2 2020 | 72,951 | $5,635 | $67.35 | $57.02 - $79.77 |
| Q1 2020 | 65,970 | $4,585 | $83.79 | $52.02 - $98.93 |
| Q4 2019 | 125,556 | $12,987 | $87.47 | $77.84 - $97.70 |
| Q3 2019 | 88,953 | $7,929 | $81.78 | $74.31 - $88.66 |
| Q2 2019 | 116,414 | $10,622 | $76.63 | $71.16 - $83.47 |
| Q1 2019 | 117,292 | $9,776 | $67.58 | $51.63 - $78.46 |
| Q4 2018 | 109,196 | $6,744 | $62.18 | $48.12 - $70.66 |
| Q3 2018 | 159,049 | $12,208 | $70.20 | $64.67 - $74.99 |
| Q2 2018 | 107,293 | $8,213 | $67.39 | $59.37 - $73.05 |
| Q1 2018 | 55,864 | $3,833 | $62.31 | $55.67 - $66.49 |
| Q4 2017 | 67,713 | $4,781 | $59.54 | $53.90 - $66.58 |
| Q3 2017 | 57,331 | $3,535 | $53.37 | $48.20 - $59.20 |
| Q2 2017 | 76,428 | $5,009 | $57.04 | $53.20 - $62.50 |
| Q1 2017 | 94,596 | $6,126 | $59.26 | $51.41 - $66.19 |
| Q4 2016 | 115,526 | $7,914 | $56.82 | $47.94 - $64.99 |
| Q3 2016 | 108,170 | $6,576 | $48.99 | $39.67 - $53.81 |
| Q2 2016 | 120,584 | $5,547 | $41.52 | $37.19 - $44.47 |
| Q1 2016 | 135,781 | $5,887 | $40.40 | $36.39 - $46.84 |
| Q4 2015 | 60,294 | $3,275 | $48.12 | $40.31 - $52.05 |
| Q3 2015 | 131,428 | $6,112 | $39.87 | $35.73 - $44.30 |
| Q2 2015 | 201,687 | $9,084 | $38.87 | $36.94 - $40.69 |
| Q1 2015 | 215,876 | $10,015 | $37.07 | $33.21 - $40.57 |
| Q4 2014 | 121,861 | $5,203 | $35.30 | $30.04 - $40.52 |
| Q3 2014 | 33,763 | $1,212 | $34.84 | $30.82 - $37.97 |
| Q2 2014 | 27,493 | $1,187 | $36.87 | $34.10 - $39.69 |
| Q1 2014 | 64,782 | $2,930 | $37.58 | $34.73 - $40.51 |
| Q4 2013 | 142,257 | $6,575 | $38.90 | $36.04 - $42.14 |
| Q3 2013 | 144,697 | $6,752 | $36.35 | $33.62 - $39.43 |
| Q2 2013 | 139,195 | $5,593 | $35.20 | $33.13 - $38.11 |