Ticker: NPK CUSIP: 637215104 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 7,897 | $843 | $104.80 | $91.28 - $120.49 |
| Q3 2025 | 25,315 | $2,839 | $106.18 | $94.71 - $117.46 |
| Q2 2025 | 10,484 | $1,027 | $87.38 | $77.63 - $100.17 |
| Q1 2025 | 24,738 | $2,175 | $95.29 | $85.21 - $103.93 |
| Q4 2024 | 10,720 | $1,055 | $80.38 | $69.80 - $99.07 |
| Q3 2024 | 10,215 | $768 | $74.60 | $69.58 - $79.26 |
| Q2 2022 | 14,690 | $964 | $70.97 | $59.99 - $79.31 |
| Q1 2022 | 24,989 | $1,923 | $81.17 | $76.40 - $89.05 |
| Q4 2021 | 6,005 | $493 | $83.82 | $78.33 - $89.50 |
| Q3 2020 | 3,292 | $269 | $87.32 | $81.09 - $95.66 |
| Q2 2020 | 7,794 | $681 | $85.05 | $68.17 - $97.90 |
| Q4 2019 | 6,514 | $576 | $87.02 | $80.39 - $92.37 |
| Q3 2019 | 3,067 | $273 | $90.44 | $82.38 - $97.82 |
| Q2 2019 | 9,812 | $915 | $101.82 | $89.24 - $112.50 |
| Q4 2018 | 8,790 | $1,028 | $125.24 | $109.50 - $133.95 |
| Q3 2018 | 30,443 | $3,947 | $126.95 | $115.25 - $140.32 |
| Q2 2018 | 37,969 | $4,708 | $107.98 | $92.00 - $136.65 |
| Q1 2018 | 29,228 | $2,740 | $99.25 | $88.80 - $108.45 |
| Q4 2017 | 11,497 | $1,143 | $109.11 | $95.50 - $121.40 |
| Q3 2017 | 3,130 | $333 | $105.66 | $95.65 - $114.70 |
| Q2 2017 | 17,791 | $1,966 | $105.57 | $98.05 - $112.45 |
| Q1 2017 | 18,091 | $1,849 | $103.21 | $91.75 - $112.00 |
| Q4 2016 | 9,695 | $1,032 | $93.06 | $83.53 - $108.75 |
| Q3 2016 | 4,183 | $367 | $90.73 | $85.13 - $96.25 |
| Q3 2015 | 9,147 | $771 | $81.19 | $74.57 - $88.00 |
| Q2 2015 | 16,617 | $1,335 | $68.50 | $61.65 - $80.34 |
| Q1 2015 | 18,330 | $1,162 | $61.65 | $56.04 - $67.90 |
| Q4 2014 | 14,418 | $837 | $59.42 | $54.07 - $63.69 |
| Q3 2014 | 6,905 | $419 | $66.40 | $60.68 - $75.50 |
| Q1 2014 | 3,893 | $304 | $78.13 | $73.04 - $84.00 |
| Q2 2013 | 4,000 | $288 | $76.01 | $70.25 - $80.50 |