Ticker: IOSP CUSIP: 45768S105 Class: Common Stock
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 322,358 | $24,673 | $75.03 | $70.10 - $79.81 |
| Q3 2025 | 375,331 | $28,961 | $82.49 | $73.21 - $89.37 |
| Q2 2025 | 295,498 | $24,848 | $86.03 | $78.60 - $94.32 |
| Q1 2025 | 243,686 | $23,089 | $103.54 | $91.98 - $114.58 |
| Q4 2024 | 233,454 | $25,694 | $111.62 | $104.73 - $124.78 |
| Q3 2024 | 226,215 | $25,583 | $113.17 | $101.07 - $129.81 |
| Q2 2024 | 202,821 | $25,067 | $121.30 | $115.10 - $129.23 |
| Q1 2024 | 186,127 | $23,999 | $117.37 | $110.33 - $126.78 |
| Q4 2023 | 183,684 | $22,637 | $102.52 | $91.88 - $121.65 |
| Q3 2023 | 182,735 | $18,676 | $100.32 | $93.27 - $107.44 |
| Q2 2023 | 178,042 | $17,883 | $95.78 | $88.08 - $103.21 |
| Q1 2023 | 210,978 | $21,661 | $102.60 | $90.19 - $110.59 |
| Q4 2022 | 220,717 | $22,703 | $96.50 | $78.79 - $110.27 |
| Q3 2022 | 217,908 | $18,667 | $89.51 | $80.19 - $98.62 |
| Q2 2022 | 211,345 | $20,244 | $91.85 | $81.71 - $101.29 |
| Q1 2022 | 230,258 | $21,311 | $89.19 | $83.58 - $94.67 |
| Q4 2021 | 221,691 | $20,027 | $82.93 | $76.29 - $89.94 |
| Q3 2021 | 234,407 | $19,742 | $83.46 | $75.85 - $90.38 |
| Q2 2021 | 204,155 | $18,498 | $92.53 | $83.80 - $100.29 |
| Q1 2021 | 221,661 | $22,762 | $92.10 | $80.91 - $99.72 |
| Q4 2020 | 146,682 | $13,308 | $71.95 | $57.19 - $85.43 |
| Q3 2020 | 138,391 | $8,763 | $68.67 | $56.85 - $78.17 |
| Q2 2020 | 109,789 | $8,482 | $67.35 | $57.02 - $79.77 |
| Q1 2020 | 93,283 | $6,481 | $83.79 | $52.02 - $98.93 |
| Q4 2019 | 94,274 | $9,752 | $87.47 | $77.84 - $97.70 |
| Q3 2019 | 100,663 | $8,974 | $81.78 | $74.31 - $88.66 |
| Q2 2019 | 130,945 | $11,947 | $76.63 | $71.16 - $83.47 |
| Q1 2019 | 131,964 | $10,999 | $67.58 | $51.63 - $78.46 |
| Q4 2018 | 109,837 | $6,784 | $62.18 | $48.12 - $70.66 |
| Q3 2018 | 141,953 | $10,896 | $70.20 | $64.67 - $74.99 |
| Q2 2018 | 157,883 | $12,086 | $67.39 | $59.37 - $73.05 |
| Q1 2018 | 161,746 | $11,096 | $62.31 | $55.67 - $66.49 |
| Q4 2017 | 122,135 | $8,623 | $59.54 | $53.90 - $66.58 |
| Q3 2017 | 104,356 | $6,433 | $53.37 | $48.20 - $59.20 |
| Q2 2017 | 77,836 | $5,103 | $57.04 | $53.20 - $62.50 |
| Q1 2017 | 65,846 | $4,263 | $59.26 | $51.41 - $66.19 |
| Q4 2016 | 65,964 | $4,519 | $56.82 | $47.94 - $64.99 |
| Q3 2016 | 36,579 | $2,224 | $48.99 | $39.67 - $53.81 |
| Q2 2016 | 42,131 | $1,938 | $41.52 | $37.19 - $44.47 |
| Q1 2016 | 30,078 | $1,304 | $40.40 | $36.39 - $46.84 |
| Q4 2015 | 24,461 | $1,329 | $48.12 | $40.31 - $52.05 |
| Q3 2015 | 25,102 | $1,168 | $39.87 | $35.73 - $44.30 |
| Q2 2015 | 5,948 | $268 | $38.87 | $36.94 - $40.69 |
| Q1 2015 | 426 | $20 | $37.07 | $33.21 - $40.57 |
| Q3 2014 | 329 | $12 | $34.84 | $30.82 - $37.97 |
| Q1 2014 | 11,172 | $505 | $37.58 | $34.73 - $40.51 |
| Q4 2013 | 1,119 | $52 | $38.90 | $36.04 - $42.14 |
| Q3 2013 | 1,278 | $60 | $36.35 | $33.62 - $39.43 |
| Q2 2013 | 17,533 | $704 | $35.20 | $33.13 - $38.11 |