Ticker: IOSP CUSIP: 45768S105 Class: Common Stock
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 373,540 | $28,591 | $75.03 | $70.10 - $79.81 |
| Q3 2025 | 360,590 | $27,823 | $82.49 | $73.21 - $89.37 |
| Q2 2025 | 356,177 | $29,951 | $86.03 | $78.60 - $94.32 |
| Q1 2025 | 354,706 | $33,608 | $103.54 | $91.98 - $114.58 |
| Q4 2024 | 352,577 | $38,805 | $111.62 | $104.73 - $124.78 |
| Q3 2024 | 336,522 | $38,057 | $113.17 | $101.07 - $129.81 |
| Q2 2024 | 325,043 | $40,172 | $121.30 | $115.10 - $129.23 |
| Q1 2024 | 316,326 | $40,787 | $117.37 | $110.33 - $126.78 |
| Q4 2023 | 307,490 | $37,895 | $102.52 | $91.88 - $121.65 |
| Q3 2023 | 298,635 | $30,520 | $100.32 | $93.27 - $107.44 |
| Q2 2023 | 286,500 | $28,776 | $95.78 | $88.08 - $103.21 |
| Q1 2023 | 281,866 | $28,939 | $102.60 | $90.19 - $110.59 |
| Q4 2022 | 280,133 | $28,814 | $96.50 | $78.79 - $110.27 |
| Q3 2022 | 282,172 | $24,175 | $89.51 | $80.19 - $98.62 |
| Q2 2022 | 277,243 | $26,557 | $91.85 | $81.71 - $101.29 |
| Q1 2022 | 267,879 | $24,792 | $89.19 | $83.58 - $94.67 |
| Q4 2021 | 256,643 | $23,186 | $82.93 | $76.29 - $89.94 |
| Q3 2021 | 245,140 | $20,646 | $83.46 | $75.85 - $90.38 |
| Q2 2021 | 235,503 | $21,339 | $92.53 | $83.80 - $100.29 |
| Q1 2021 | 226,321 | $23,241 | $92.10 | $80.91 - $99.72 |
| Q4 2020 | 220,388 | $19,996 | $71.95 | $57.19 - $85.43 |
| Q3 2020 | 215,811 | $13,666 | $68.67 | $56.85 - $78.17 |
| Q2 2020 | 239,867 | $18,530 | $67.35 | $57.02 - $79.77 |
| Q1 2020 | 247,013 | $17,165 | $83.79 | $52.02 - $98.93 |
| Q4 2019 | 242,438 | $25,078 | $87.47 | $77.84 - $97.70 |
| Q3 2019 | 238,388 | $21,250 | $81.78 | $74.31 - $88.66 |
| Q2 2019 | 208,538 | $19,028 | $76.63 | $71.16 - $83.47 |
| Q1 2019 | 208,269 | $17,360 | $67.58 | $51.63 - $78.46 |
| Q4 2018 | 197,438 | $12,194 | $62.18 | $48.12 - $70.66 |
| Q3 2018 | 199,782 | $15,334 | $70.20 | $64.67 - $74.99 |
| Q2 2018 | 195,074 | $14,933 | $67.39 | $59.37 - $73.05 |
| Q1 2018 | 184,143 | $12,633 | $62.31 | $55.67 - $66.49 |
| Q4 2017 | 167,152 | $11,801 | $59.54 | $53.90 - $66.58 |
| Q3 2017 | 158,091 | $9,747 | $53.37 | $48.20 - $59.20 |
| Q2 2017 | 147,758 | $9,686 | $57.04 | $53.20 - $62.50 |
| Q1 2017 | 141,549 | $9,166 | $59.26 | $51.41 - $66.19 |
| Q4 2016 | 131,297 | $8,994 | $56.82 | $47.94 - $64.99 |
| Q3 2016 | 123,544 | $7,513 | $48.99 | $39.67 - $53.81 |
| Q2 2016 | 112,912 | $5,193 | $41.52 | $37.19 - $44.47 |
| Q1 2016 | 136,036 | $5,899 | $40.40 | $36.39 - $46.84 |
| Q4 2015 | 131,628 | $7,149 | $48.12 | $40.31 - $52.05 |
| Q3 2015 | 137,925 | $6,415 | $39.87 | $35.73 - $44.30 |
| Q2 2015 | 105,042 | $4,732 | $38.87 | $36.94 - $40.69 |
| Q1 2015 | 94,377 | $4,379 | $37.07 | $33.21 - $40.57 |
| Q4 2014 | 85,150 | $3,636 | $35.30 | $30.04 - $40.52 |
| Q3 2014 | 82,492 | $2,962 | $34.84 | $30.82 - $37.97 |
| Q2 2014 | 80,827 | $3,490 | $36.87 | $34.10 - $39.69 |
| Q1 2014 | 73,014 | $3,303 | $37.58 | $34.73 - $40.51 |
| Q4 2013 | 67,634 | $3,127 | $38.90 | $36.04 - $42.14 |
| Q3 2013 | 76,821 | $3,589 | $36.35 | $33.62 - $39.43 |
| Q2 2013 | 57,680 | $2,351 | $35.20 | $33.13 - $38.11 |