Ticker: NPK CUSIP: 637215104 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 22,556 | $2,408 | $104.80 | $91.28 - $120.49 |
| Q3 2025 | 16,610 | $1,863 | $106.18 | $94.71 - $117.46 |
| Q2 2025 | 29,815 | $2,921 | $87.38 | $77.63 - $100.17 |
| Q1 2025 | 33,425 | $2,938 | $95.29 | $85.21 - $103.93 |
| Q4 2024 | 45,069 | $4,436 | $80.38 | $69.80 - $99.07 |
| Q3 2024 | 41,277 | $3,102 | $74.60 | $69.58 - $79.26 |
| Q2 2024 | 26,614 | $2,000 | $78.76 | $72.07 - $86.08 |
| Q1 2024 | 21,965 | $1,841 | $79.07 | $73.97 - $84.29 |
| Q4 2023 | 27,401 | $2,200 | $76.85 | $70.86 - $83.00 |
| Q3 2023 | 35,528 | $2,574 | $75.50 | $70.24 - $81.40 |
| Q2 2023 | 22,700 | $1,662 | $73.54 | $66.83 - $82.59 |
| Q1 2023 | 8,260 | $596 | $72.97 | $67.77 - $81.50 |
| Q4 2022 | 5,334 | $0 | $68.37 | $63.90 - $71.73 |
| Q3 2022 | 6,334 | $412 | $69.19 | $63.06 - $78.78 |
| Q2 2022 | 4,178 | $274 | $70.97 | $59.99 - $79.31 |
| Q1 2022 | 46,101 | $3,549 | $81.17 | $76.40 - $89.05 |
| Q4 2021 | 10,586 | $868 | $83.82 | $78.33 - $89.50 |
| Q3 2021 | 23,351 | $1,917 | $89.68 | $79.78 - $103.69 |
| Q2 2021 | 26,521 | $2,696 | $103.08 | $97.03 - $107.89 |
| Q1 2021 | 4,221 | $431 | $98.38 | $86.66 - $117.87 |
| Q4 2020 | 23,423 | $2,071 | $85.92 | $79.49 - $94.30 |
| Q3 2020 | 32,908 | $2,669 | $87.32 | $81.09 - $95.66 |
| Q2 2020 | 39,063 | $3,414 | $85.05 | $68.17 - $97.90 |
| Q1 2020 | 30,316 | $2,147 | $84.26 | $66.60 - $93.99 |
| Q4 2019 | 29,360 | $2,595 | $87.02 | $80.39 - $92.37 |
| Q3 2019 | 41,591 | $3,705 | $90.44 | $82.38 - $97.82 |
| Q2 2019 | 43,160 | $3,884 | $101.82 | $89.24 - $112.50 |
| Q1 2019 | 15,099 | $1,638 | $116.40 | $99.24 - $133.12 |
| Q4 2018 | 6,819 | $797 | $125.24 | $109.50 - $133.95 |
| Q3 2018 | 9,670 | $1,253 | $126.95 | $115.25 - $140.32 |
| Q2 2018 | 19,422 | $2,408 | $107.98 | $92.00 - $136.65 |
| Q1 2018 | 17,006 | $1,594 | $99.25 | $88.80 - $108.45 |
| Q4 2017 | 13,048 | $1,297 | $109.11 | $95.50 - $121.40 |
| Q3 2017 | 7,683 | $821 | $105.66 | $95.65 - $114.70 |
| Q2 2017 | 1,631 | $180 | $105.57 | $98.05 - $112.45 |
| Q1 2017 | 10,749 | $1,099 | $103.21 | $91.75 - $112.00 |
| Q4 2016 | 16,506 | $1,756 | $93.06 | $83.53 - $108.75 |
| Q3 2016 | 5,210 | $457 | $90.73 | $85.13 - $96.25 |
| Q2 2016 | 2,308 | $218 | $87.97 | $81.96 - $94.35 |
| Q1 2016 | 28,180 | $2,359 | $80.09 | $72.30 - $88.00 |
| Q4 2015 | 37,050 | $3,070 | $86.71 | $78.13 - $94.18 |
| Q3 2015 | 27,450 | $2,313 | $81.19 | $74.57 - $88.00 |
| Q2 2015 | 27,450 | $2,204 | $68.50 | $61.65 - $80.34 |
| Q2 2014 | 5,249 | $382 | $71.81 | $67.09 - $77.75 |
| Q1 2014 | 6,151 | $480 | $78.13 | $73.04 - $84.00 |
| Q4 2013 | 13,992 | $1,126 | $73.58 | $67.32 - $81.00 |
| Q3 2013 | 14,265 | $1,004 | $72.80 | $68.50 - $77.50 |
| Q2 2013 | 15,348 | $1,106 | $76.01 | $70.25 - $80.50 |