Ticker: NPK CUSIP: 637215104 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 67,993 | $7,259 | $104.80 | $91.28 - $120.49 |
| Q3 2025 | 64,759 | $7,263 | $106.18 | $94.71 - $117.46 |
| Q2 2025 | 67,985 | $6,660 | $87.38 | $77.63 - $100.17 |
| Q1 2025 | 63,554 | $5,587 | $95.29 | $85.21 - $103.93 |
| Q4 2024 | 72,914 | $7,176 | $80.38 | $69.80 - $99.07 |
| Q3 2024 | 69,471 | $5,220 | $74.60 | $69.58 - $79.26 |
| Q2 2024 | 63,981 | $4,807 | $78.76 | $72.07 - $86.08 |
| Q1 2024 | 65,445 | $5,484 | $79.07 | $73.97 - $84.29 |
| Q4 2023 | 56,376 | $4,526 | $76.85 | $70.86 - $83.00 |
| Q3 2023 | 50,310 | $3,645 | $75.50 | $70.24 - $81.40 |
| Q2 2023 | 52,556 | $3,847 | $73.54 | $66.83 - $82.59 |
| Q1 2023 | 52,839 | $3,809 | $72.97 | $67.77 - $81.50 |
| Q4 2022 | 53,573 | $3,668 | $68.37 | $63.90 - $71.73 |
| Q3 2022 | 51,399 | $3,343 | $69.19 | $63.06 - $78.78 |
| Q2 2022 | 46,623 | $3,061 | $70.97 | $59.99 - $79.31 |
| Q1 2022 | 40,897 | $3,147 | $81.17 | $76.40 - $89.05 |
| Q4 2021 | 52,711 | $4,325 | $83.82 | $78.33 - $89.50 |
| Q3 2021 | 41,720 | $3,425 | $89.68 | $79.78 - $103.69 |
| Q2 2021 | 47,326 | $4,810 | $103.08 | $97.03 - $107.89 |
| Q1 2021 | 84,099 | $8,583 | $98.38 | $86.66 - $117.87 |
| Q4 2020 | 79,548 | $7,035 | $85.92 | $79.49 - $94.30 |
| Q3 2020 | 55,658 | $4,556 | $87.32 | $81.09 - $95.66 |
| Q2 2020 | 45,951 | $4,015 | $85.05 | $68.17 - $97.90 |
| Q1 2020 | 76,084 | $5,387 | $84.26 | $66.60 - $93.99 |
| Q4 2019 | 57,653 | $5,096 | $87.02 | $80.39 - $92.37 |
| Q3 2019 | 72,376 | $6,448 | $90.44 | $82.38 - $97.82 |
| Q2 2019 | 125,966 | $11,751 | $101.82 | $89.24 - $112.50 |
| Q1 2019 | 12,001 | $1,303 | $116.40 | $99.24 - $133.12 |
| Q4 2018 | 18,512 | $2,164 | $125.24 | $109.50 - $133.95 |
| Q3 2018 | 18,525 | $2,402 | $126.95 | $115.25 - $140.32 |
| Q2 2018 | 20,926 | $2,596 | $107.98 | $92.00 - $136.65 |
| Q1 2018 | 20,162 | $1,890 | $99.25 | $88.80 - $108.45 |
| Q4 2017 | 14,663 | $1,459 | $109.11 | $95.50 - $121.40 |
| Q3 2017 | 25,212 | $2,684 | $105.66 | $95.65 - $114.70 |
| Q2 2017 | 25,914 | $2,864 | $105.57 | $98.05 - $112.45 |
| Q1 2017 | 14,366 | $1,468 | $103.21 | $91.75 - $112.00 |
| Q4 2016 | 30,219 | $3,216 | $93.06 | $83.53 - $108.75 |
| Q3 2016 | 12,800 | $1,123 | $90.73 | $85.13 - $96.25 |
| Q2 2016 | 20,988 | $1,980 | $87.97 | $81.96 - $94.35 |
| Q1 2016 | 34,357 | $2,877 | $80.09 | $72.30 - $88.00 |
| Q4 2015 | 62,393 | $5,169 | $86.71 | $78.13 - $94.18 |
| Q3 2015 | 54,121 | $4,560 | $81.19 | $74.57 - $88.00 |
| Q2 2015 | 29,810 | $2,395 | $68.50 | $61.65 - $80.34 |
| Q1 2015 | 4,470 | $284 | $61.65 | $56.04 - $67.90 |
| Q4 2014 | 8,611 | $500 | $59.42 | $54.07 - $63.69 |
| Q3 2014 | 11,777 | $715 | $66.40 | $60.68 - $75.50 |
| Q2 2014 | 17,452 | $1,270 | $71.81 | $67.09 - $77.75 |
| Q1 2014 | 20,893 | $1,630 | $78.13 | $73.04 - $84.00 |
| Q4 2013 | 14,472 | $1,165 | $73.58 | $67.32 - $81.00 |
| Q3 2013 | 19,031 | $1,339 | $72.80 | $68.50 - $77.50 |
| Q2 2013 | 13,199 | $950 | $76.01 | $70.25 - $80.50 |