Ticker: NPK CUSIP: 637215104 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 3,347 | $357 | $104.80 | $91.28 - $120.49 |
| Q3 2025 | 2,881 | $323 | $106.18 | $94.71 - $117.46 |
| Q2 2025 | 2,881 | $282 | $87.38 | $77.63 - $100.17 |
| Q1 2025 | 2,881 | $253 | $95.29 | $85.21 - $103.93 |
| Q4 2024 | 2,881 | $284 | $80.38 | $69.80 - $99.07 |
| Q3 2024 | 2,406 | $181 | $74.60 | $69.58 - $79.26 |
| Q2 2024 | 2,406 | $181 | $78.76 | $72.07 - $86.08 |
| Q1 2024 | 2,406 | $202 | $79.07 | $73.97 - $84.29 |
| Q4 2023 | 2,406 | $193 | $76.85 | $70.86 - $83.00 |
| Q3 2023 | 2,406 | $174 | $75.50 | $70.24 - $81.40 |
| Q2 2023 | 2,406 | $176 | $73.54 | $66.83 - $82.59 |
| Q1 2023 | 3,181 | $229 | $72.97 | $67.77 - $81.50 |
| Q4 2022 | 2,386 | $163 | $68.37 | $63.90 - $71.73 |
| Q3 2022 | 2,070 | $135 | $69.19 | $63.06 - $78.78 |
| Q2 2022 | 3,191 | $209 | $70.97 | $59.99 - $79.31 |
| Q1 2022 | 2,850 | $220 | $81.17 | $76.40 - $89.05 |
| Q4 2021 | 15,835 | $1,299 | $83.82 | $78.33 - $89.50 |
| Q3 2021 | 15,683 | $1,287 | $89.68 | $79.78 - $103.69 |
| Q2 2021 | 21,247 | $2,159 | $103.08 | $97.03 - $107.89 |
| Q1 2021 | 4,141 | $424 | $98.38 | $86.66 - $117.87 |
| Q4 2020 | 23,355 | $2,065 | $85.92 | $79.49 - $94.30 |
| Q3 2020 | 3,744 | $306 | $87.32 | $81.09 - $95.66 |
| Q2 2020 | 3,190 | $278 | $85.05 | $68.17 - $97.90 |
| Q1 2020 | 2,409 | $171 | $84.26 | $66.60 - $93.99 |
| Q4 2019 | 2,511 | $221 | $87.02 | $80.39 - $92.37 |
| Q3 2019 | 29,986 | $2,670 | $90.44 | $82.38 - $97.82 |
| Q2 2019 | 19,374 | $1,805 | $101.82 | $89.24 - $112.50 |
| Q1 2019 | 14,741 | $1,597 | $116.40 | $99.24 - $133.12 |
| Q4 2018 | 12,714 | $1,484 | $125.24 | $109.50 - $133.95 |
| Q3 2018 | 10,595 | $1,372 | $126.95 | $115.25 - $140.32 |
| Q2 2018 | 8,563 | $1,060 | $107.98 | $92.00 - $136.65 |
| Q1 2018 | 17,519 | $1,641 | $99.25 | $88.80 - $108.45 |
| Q4 2017 | 17,715 | $1,760 | $109.11 | $95.50 - $121.40 |
| Q3 2017 | 11,837 | $1,257 | $105.66 | $95.65 - $114.70 |
| Q2 2017 | 8,054 | $889 | $105.57 | $98.05 - $112.45 |
| Q1 2017 | 4,559 | $465 | $103.21 | $91.75 - $112.00 |
| Q4 2016 | 3,636 | $386 | $93.06 | $83.53 - $108.75 |
| Q3 2016 | 17,828 | $1,563 | $90.73 | $85.13 - $96.25 |
| Q2 2016 | 16,735 | $1,577 | $87.97 | $81.96 - $94.35 |
| Q1 2016 | 14,472 | $1,210 | $80.09 | $72.30 - $88.00 |
| Q4 2015 | 17,019 | $1,409 | $86.71 | $78.13 - $94.18 |
| Q3 2015 | 15,305 | $1,288 | $81.19 | $74.57 - $88.00 |
| Q2 2015 | 13,228 | $1,061 | $68.50 | $61.65 - $80.34 |
| Q1 2015 | 11,797 | $747 | $61.65 | $56.04 - $67.90 |
| Q4 2014 | 18,282 | $1,060 | $59.42 | $54.07 - $63.69 |
| Q3 2014 | 6,255 | $379 | $66.40 | $60.68 - $75.50 |
| Q2 2014 | 3,407 | $248 | $71.81 | $67.09 - $77.75 |
| Q1 2014 | 3,524 | $274 | $78.13 | $73.04 - $84.00 |
| Q4 2013 | 2,339 | $187 | $73.58 | $67.32 - $81.00 |
| Q3 2013 | 7,951 | $559 | $72.80 | $68.50 - $77.50 |