Ticker: NPK CUSIP: 637215104 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q3 2025 | 1,815 | $204 | $106.18 | $94.71 - $117.46 |
| Q4 2021 | 2,930 | $240 | $83.82 | $78.33 - $89.50 |
| Q3 2021 | 2,939 | $241 | $89.68 | $79.78 - $103.69 |
| Q2 2021 | 3,057 | $311 | $103.08 | $97.03 - $107.89 |
| Q1 2021 | 2,835 | $289 | $98.38 | $86.66 - $117.87 |
| Q4 2020 | 3,073 | $272 | $85.92 | $79.49 - $94.30 |
| Q3 2020 | 3,047 | $249 | $87.32 | $81.09 - $95.66 |
| Q2 2020 | 3,047 | $261 | $85.05 | $68.17 - $97.90 |
| Q1 2020 | 3,191 | $226 | $84.26 | $66.60 - $93.99 |
| Q4 2019 | 3,097 | $274 | $87.02 | $80.39 - $92.37 |
| Q3 2019 | 3,165 | $282 | $90.44 | $82.38 - $97.82 |
| Q2 2019 | 3,167 | $295 | $101.82 | $89.24 - $112.50 |
| Q3 2018 | 1,786 | $232 | $126.95 | $115.25 - $140.32 |
| Q2 2018 | 3,647 | $452 | $107.98 | $92.00 - $136.65 |
| Q1 2018 | 3,662 | $344 | $99.25 | $88.80 - $108.45 |
| Q4 2017 | 3,802 | $378 | $109.11 | $95.50 - $121.40 |
| Q3 2017 | 3,790 | $404 | $105.66 | $95.65 - $114.70 |
| Q2 2017 | 3,728 | $412 | $105.57 | $98.05 - $112.45 |
| Q1 2017 | 3,870 | $396 | $103.21 | $91.75 - $112.00 |
| Q4 2016 | 3,387 | $360 | $93.06 | $83.53 - $108.75 |
| Q3 2016 | 3,369 | $296 | $90.73 | $85.13 - $96.25 |
| Q2 2016 | 3,384 | $320 | $87.97 | $81.96 - $94.35 |
| Q1 2016 | 3,276 | $276 | $80.09 | $72.30 - $88.00 |
| Q4 2015 | 3,325 | $275 | $86.71 | $78.13 - $94.18 |
| Q3 2015 | 3,325 | $280 | $81.19 | $74.57 - $88.00 |
| Q2 2015 | 3,268 | $263 | $68.50 | $61.65 - $80.34 |
| Q1 2015 | 3,415 | $217 | $61.65 | $56.04 - $67.90 |
| Q4 2014 | 3,300 | $191 | $59.42 | $54.07 - $63.69 |
| Q3 2014 | 3,344 | $203 | $66.40 | $60.68 - $75.50 |
| Q2 2014 | 3,301 | $241 | $71.81 | $67.09 - $77.75 |
| Q1 2014 | 4,091 | $319 | $78.13 | $73.04 - $84.00 |
| Q4 2013 | 4,327 | $349 | $73.58 | $67.32 - $81.00 |
| Q3 2013 | 3,694 | $260 | $72.80 | $68.50 - $77.50 |
| Q2 2013 | 3,717 | $268 | $76.01 | $70.25 - $80.50 |