Ticker: NPK CUSIP: 637215104 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 45,892 | $4,899 | $104.80 | $91.28 - $120.49 |
| Q3 2025 | 49,514 | $5,553 | $106.18 | $94.71 - $117.46 |
| Q2 2025 | 49,593 | $4,858 | $87.38 | $77.63 - $100.17 |
| Q1 2025 | 51,849 | $4,558 | $95.29 | $85.21 - $103.93 |
| Q4 2024 | 53,470 | $5,263 | $80.38 | $69.80 - $99.07 |
| Q3 2024 | 51,923 | $3,901 | $74.60 | $69.58 - $79.26 |
| Q2 2024 | 51,879 | $3,898 | $78.76 | $72.07 - $86.08 |
| Q1 2024 | 53,024 | $4,443 | $79.07 | $73.97 - $84.29 |
| Q4 2023 | 54,326 | $4,361 | $76.85 | $70.86 - $83.00 |
| Q3 2023 | 54,749 | $3,967 | $75.50 | $70.24 - $81.40 |
| Q2 2023 | 54,277 | $3,973 | $73.54 | $66.83 - $82.59 |
| Q1 2023 | 54,188 | $3,906 | $72.97 | $67.77 - $81.50 |
| Q4 2022 | 56,040 | $3,836 | $68.37 | $63.90 - $71.73 |
| Q3 2022 | 55,500 | $3,610 | $69.19 | $63.06 - $78.78 |
| Q2 2022 | 54,401 | $3,570 | $70.97 | $59.99 - $79.31 |
| Q1 2022 | 54,826 | $4,219 | $81.17 | $76.40 - $89.05 |
| Q4 2021 | 56,960 | $4,672 | $83.82 | $78.33 - $89.50 |
| Q3 2021 | 57,383 | $4,711 | $89.68 | $79.78 - $103.69 |
| Q2 2021 | 59,475 | $6,046 | $103.08 | $97.03 - $107.89 |
| Q1 2021 | 60,704 | $6,196 | $98.38 | $86.66 - $117.87 |
| Q4 2020 | 64,805 | $5,732 | $85.92 | $79.49 - $94.30 |
| Q3 2020 | 67,796 | $5,550 | $87.32 | $81.09 - $95.66 |
| Q2 2020 | 70,563 | $6,167 | $85.05 | $68.17 - $97.90 |
| Q1 2020 | 66,633 | $4,718 | $84.26 | $66.60 - $93.99 |
| Q4 2019 | 67,833 | $5,996 | $87.02 | $80.39 - $92.37 |
| Q3 2019 | 66,921 | $5,962 | $90.44 | $82.38 - $97.82 |
| Q2 2019 | 64,451 | $6,012 | $101.82 | $89.24 - $112.50 |
| Q1 2019 | 63,316 | $6,872 | $116.40 | $99.24 - $133.12 |
| Q4 2018 | 63,503 | $7,424 | $125.24 | $109.50 - $133.95 |
| Q3 2018 | 66,115 | $8,571 | $126.95 | $115.25 - $140.32 |
| Q2 2018 | 63,978 | $7,932 | $107.98 | $92.00 - $136.65 |
| Q1 2018 | 62,815 | $5,889 | $99.25 | $88.80 - $108.45 |
| Q4 2017 | 60,749 | $6,041 | $109.11 | $95.50 - $121.40 |
| Q3 2017 | 63,200 | $6,727 | $105.66 | $95.65 - $114.70 |
| Q2 2017 | 63,185 | $6,982 | $105.57 | $98.05 - $112.45 |
| Q1 2017 | 63,018 | $6,441 | $103.21 | $91.75 - $112.00 |
| Q4 2016 | 61,340 | $6,526 | $93.06 | $83.53 - $108.75 |
| Q3 2016 | 58,645 | $5,149 | $90.73 | $85.13 - $96.25 |
| Q2 2016 | 55,712 | $5,257 | $87.97 | $81.96 - $94.35 |
| Q1 2016 | 57,295 | $4,798 | $80.09 | $72.30 - $88.00 |
| Q4 2015 | 56,692 | $4,697 | $86.71 | $78.13 - $94.18 |
| Q3 2015 | 53,813 | $4,534 | $81.19 | $74.57 - $88.00 |
| Q2 2015 | 51,721 | $4,154 | $68.50 | $61.65 - $80.34 |
| Q1 2015 | 55,143 | $3,496 | $61.65 | $56.04 - $67.90 |
| Q4 2014 | 55,108 | $3,198 | $59.42 | $54.07 - $63.69 |
| Q3 2014 | 57,218 | $3,474 | $66.40 | $60.68 - $75.50 |
| Q2 2014 | 63,091 | $4,596 | $71.81 | $67.09 - $77.75 |
| Q1 2014 | 66,551 | $5,194 | $78.13 | $73.04 - $84.00 |
| Q4 2013 | 71,073 | $5,721 | $73.58 | $67.32 - $81.00 |
| Q3 2013 | 70,810 | $4,986 | $72.80 | $68.50 - $77.50 |
| Q2 2013 | 76,447 | $5,506 | $76.01 | $70.25 - $80.50 |