Ticker: IOSP CUSIP: 45768S105 Class: Common Stock
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 1,175,122 | $89,946 | $75.03 | $70.10 - $79.81 |
| Q3 2025 | 1,166,975 | $90,043 | $82.49 | $73.21 - $89.37 |
| Q2 2025 | 1,168,925 | $98,296 | $86.03 | $78.60 - $94.32 |
| Q1 2025 | 1,158,017 | $109,722 | $103.54 | $91.98 - $114.58 |
| Q4 2024 | 1,158,583 | $127,514 | $111.62 | $104.73 - $124.78 |
| Q3 2024 | 1,177,459 | $133,160 | $113.17 | $101.07 - $129.81 |
| Q2 2024 | 1,188,025 | $146,828 | $121.30 | $115.10 - $129.23 |
| Q1 2024 | 1,198,964 | $154,594 | $117.37 | $110.33 - $126.78 |
| Q4 2023 | 1,215,525 | $149,803 | $102.52 | $91.88 - $121.65 |
| Q3 2023 | 1,222,075 | $124,898 | $100.32 | $93.27 - $107.44 |
| Q2 2023 | 1,226,560 | $123,196 | $95.78 | $88.08 - $103.21 |
| Q1 2023 | 1,217,162 | $124,964 | $102.60 | $90.19 - $110.59 |
| Q4 2022 | 1,197,700 | $123 | $96.50 | $78.79 - $110.27 |
| Q3 2022 | 1,197,212 | $102,565 | $89.51 | $80.19 - $98.62 |
| Q2 2022 | 1,191,031 | $114,087 | $91.85 | $81.71 - $101.29 |
| Q1 2022 | 1,168,986 | $108,190 | $89.19 | $83.58 - $94.67 |
| Q4 2021 | 1,157,043 | $104,527 | $82.93 | $76.29 - $89.94 |
| Q3 2021 | 1,165,747 | $98,181 | $83.46 | $75.85 - $90.38 |
| Q2 2021 | 1,175,244 | $106,488 | $92.53 | $83.80 - $100.29 |
| Q1 2021 | 1,188,237 | $122,020 | $92.10 | $80.91 - $99.72 |
| Q4 2020 | 1,237,726 | $112,298 | $71.95 | $57.19 - $85.43 |
| Q3 2020 | 1,328,028 | $84,090 | $68.67 | $56.85 - $78.17 |
| Q2 2020 | 1,387,907 | $107,212 | $67.35 | $57.02 - $79.77 |
| Q1 2020 | 1,387,450 | $96,413 | $83.79 | $52.02 - $98.93 |
| Q4 2019 | 1,439,139 | $148,864 | $87.47 | $77.84 - $97.70 |
| Q3 2019 | 1,454,137 | $129,622 | $81.78 | $74.31 - $88.66 |
| Q2 2019 | 1,467,432 | $133,885 | $76.63 | $71.16 - $83.47 |
| Q1 2019 | 1,460,495 | $121,733 | $67.58 | $51.63 - $78.46 |
| Q4 2018 | 1,465,866 | $90,532 | $62.18 | $48.12 - $70.66 |
| Q3 2018 | 1,481,571 | $113,710 | $70.20 | $64.67 - $74.99 |
| Q2 2018 | 1,497,213 | $114,612 | $67.39 | $59.37 - $73.05 |
| Q1 2018 | 1,490,072 | $102,219 | $62.31 | $55.67 - $66.49 |
| Q4 2017 | 1,403,568 | $99,092 | $59.54 | $53.90 - $66.58 |
| Q3 2017 | 1,359,181 | $83,793 | $53.37 | $48.20 - $59.20 |
| Q2 2017 | 1,348,084 | $88,366 | $57.04 | $53.20 - $62.50 |
| Q1 2017 | 1,348,607 | $87,321 | $59.26 | $51.41 - $66.19 |
| Q4 2016 | 1,325,355 | $90,788 | $56.82 | $47.94 - $64.99 |
| Q3 2016 | 1,289,303 | $78,401 | $48.99 | $39.67 - $53.81 |
| Q2 2016 | 1,286,671 | $59,173 | $41.52 | $37.19 - $44.47 |
| Q1 2016 | 1,238,147 | $53,687 | $40.40 | $36.39 - $46.84 |
| Q4 2015 | 1,120,831 | $60,873 | $48.12 | $40.31 - $52.05 |
| Q3 2015 | 1,018,380 | $47,366 | $39.87 | $35.73 - $44.30 |
| Q2 2015 | 946,528 | $42,632 | $38.87 | $36.94 - $40.69 |
| Q1 2015 | 884,010 | $41,009 | $37.07 | $33.21 - $40.57 |
| Q4 2014 | 808,308 | $34,515 | $35.30 | $30.04 - $40.52 |
| Q3 2014 | 772,083 | $27,718 | $34.84 | $30.82 - $37.97 |
| Q2 2014 | 646,029 | $27,889 | $36.87 | $34.10 - $39.69 |
| Q1 2014 | 590,138 | $26,691 | $37.58 | $34.73 - $40.51 |
| Q4 2013 | 562,719 | $26,009 | $38.90 | $36.04 - $42.14 |
| Q3 2013 | 568,679 | $26,534 | $36.35 | $33.62 - $39.43 |
| Q2 2013 | 554,840 | $22,294 | $35.20 | $33.13 - $38.11 |