Ticker: NPK CUSIP: 637215104 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 8,655 | $924 | $104.80 | $91.28 - $120.49 |
| Q3 2025 | 22,492 | $2,522 | $106.18 | $94.71 - $117.46 |
| Q2 2025 | 16,087 | $1,576 | $87.38 | $77.63 - $100.17 |
| Q1 2025 | 7,274 | $639 | $95.29 | $85.21 - $103.93 |
| Q4 2024 | 9,019 | $888 | $80.38 | $69.80 - $99.07 |
| Q3 2024 | 11,837 | $889 | $74.60 | $69.58 - $79.26 |
| Q2 2024 | 20,019 | $1,504 | $78.76 | $72.07 - $86.08 |
| Q1 2024 | 8,223 | $689 | $79.07 | $73.97 - $84.29 |
| Q4 2023 | 11,970 | $961 | $76.85 | $70.86 - $83.00 |
| Q3 2023 | 10,486 | $760 | $75.50 | $70.24 - $81.40 |
| Q2 2023 | 7,911 | $579 | $73.54 | $66.83 - $82.59 |
| Q1 2023 | 8,163 | $588 | $72.97 | $67.77 - $81.50 |
| Q4 2022 | 5,375 | $368 | $68.37 | $63.90 - $71.73 |
| Q3 2022 | 2,548 | $166 | $69.19 | $63.06 - $78.78 |
| Q2 2022 | 5,206 | $341 | $70.97 | $59.99 - $79.31 |
| Q1 2022 | 11,971 | $921 | $81.17 | $76.40 - $89.05 |
| Q4 2021 | 11,257 | $923 | $83.82 | $78.33 - $89.50 |
| Q3 2021 | 10,187 | $836 | $89.68 | $79.78 - $103.69 |
| Q2 2021 | 6,319 | $642 | $103.08 | $97.03 - $107.89 |
| Q1 2021 | 15,310 | $1,562 | $98.38 | $86.66 - $117.87 |
| Q4 2020 | 8,147 | $721 | $85.92 | $79.49 - $94.30 |
| Q3 2020 | 8,387 | $686 | $87.32 | $81.09 - $95.66 |
| Q2 2020 | 8,381 | $733 | $85.05 | $68.17 - $97.90 |
| Q1 2020 | 9,007 | $638 | $84.26 | $66.60 - $93.99 |
| Q4 2019 | 13,366 | $1,181 | $87.02 | $80.39 - $92.37 |
| Q3 2019 | 10,372 | $924 | $90.44 | $82.38 - $97.82 |
| Q2 2019 | 13,638 | $1,271 | $101.82 | $89.24 - $112.50 |
| Q1 2019 | 4,952 | $538 | $116.40 | $99.24 - $133.12 |
| Q4 2018 | 8,222 | $961 | $125.24 | $109.50 - $133.95 |
| Q3 2018 | 3,098 | $402 | $126.95 | $115.25 - $140.32 |
| Q2 2018 | 3,781 | $469 | $107.98 | $92.00 - $136.65 |
| Q1 2018 | 4,141 | $388 | $99.25 | $88.80 - $108.45 |
| Q4 2017 | 5,436 | $540 | $109.11 | $95.50 - $121.40 |
| Q3 2017 | 8,289 | $882 | $105.66 | $95.65 - $114.70 |
| Q2 2017 | 7,275 | $804 | $105.57 | $98.05 - $112.45 |
| Q1 2017 | 8,071 | $825 | $103.21 | $91.75 - $112.00 |
| Q4 2016 | 4,562 | $485 | $93.06 | $83.53 - $108.75 |
| Q3 2016 | 937 | $83 | $90.73 | $85.13 - $96.25 |
| Q2 2016 | 841 | $80 | $87.97 | $81.96 - $94.35 |
| Q1 2016 | 1,559 | $131 | $80.09 | $72.30 - $88.00 |
| Q4 2015 | 1,112 | $92 | $86.71 | $78.13 - $94.18 |
| Q3 2015 | 2,094 | $176 | $81.19 | $74.57 - $88.00 |
| Q2 2015 | 5,254 | $422 | $68.50 | $61.65 - $80.34 |
| Q1 2015 | 755 | $48 | $61.65 | $56.04 - $67.90 |
| Q4 2014 | 18,256 | $1,059 | $59.42 | $54.07 - $63.69 |
| Q3 2014 | 17,134 | $1,040 | $66.40 | $60.68 - $75.50 |
| Q2 2014 | 17,440 | $1,270 | $71.81 | $67.09 - $77.75 |
| Q1 2014 | 20,627 | $1,610 | $78.13 | $73.04 - $84.00 |
| Q4 2013 | 23,735 | $1,911 | $73.58 | $67.32 - $81.00 |
| Q3 2013 | 21,452 | $1,511 | $72.80 | $68.50 - $77.50 |
| Q2 2013 | 27,786 | $2,001 | $76.01 | $70.25 - $80.50 |