Ticker: NPK CUSIP: 637215104 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 61,927 | $6,611 | $104.80 | $91.28 - $120.49 |
| Q3 2025 | 74,821 | $8,391 | $106.18 | $94.71 - $117.46 |
| Q2 2025 | 75,053 | $7,352 | $87.38 | $77.63 - $100.17 |
| Q1 2025 | 76,346 | $6,712 | $95.29 | $85.21 - $103.93 |
| Q4 2024 | 77,160 | $7,594 | $80.38 | $69.80 - $99.07 |
| Q3 2024 | 81,408 | $6,117 | $74.60 | $69.58 - $79.26 |
| Q2 2024 | 86,148 | $6,472 | $78.76 | $72.07 - $86.08 |
| Q1 2024 | 87,469 | $7,330 | $79.07 | $73.97 - $84.29 |
| Q4 2023 | 90,151 | $7,237 | $76.85 | $70.86 - $83.00 |
| Q3 2023 | 84,445 | $6,119 | $75.50 | $70.24 - $81.40 |
| Q2 2023 | 84,969 | $6,220 | $73.54 | $66.83 - $82.59 |
| Q1 2023 | 86,282 | $6,220 | $72.97 | $67.77 - $81.50 |
| Q4 2022 | 87,453 | $5,987 | $68.37 | $63.90 - $71.73 |
| Q3 2022 | 61,952 | $4,031 | $69.19 | $63.06 - $78.78 |
| Q2 2022 | 54,869 | $3,602 | $70.97 | $59.99 - $79.31 |
| Q1 2022 | 56,400 | $4,340 | $81.17 | $76.40 - $89.05 |
| Q4 2021 | 52,391 | $4,297 | $83.82 | $78.33 - $89.50 |
| Q3 2021 | 72,249 | $5,931 | $89.68 | $79.78 - $103.69 |
| Q2 2021 | 71,212 | $7,238 | $103.08 | $97.03 - $107.89 |
| Q1 2021 | 74,903 | $7,645 | $98.38 | $86.66 - $117.87 |
| Q4 2020 | 74,415 | $6,581 | $85.92 | $79.49 - $94.30 |
| Q3 2020 | 65,479 | $5,361 | $87.32 | $81.09 - $95.66 |
| Q2 2020 | 70,636 | $6,173 | $85.05 | $68.17 - $97.90 |
| Q1 2020 | 71,012 | $5,028 | $84.26 | $66.60 - $93.99 |
| Q4 2019 | 69,351 | $6,129 | $87.02 | $80.39 - $92.37 |
| Q3 2019 | 75,664 | $6,741 | $90.44 | $82.38 - $97.82 |
| Q2 2019 | 77,533 | $7,233 | $101.82 | $89.24 - $112.50 |
| Q1 2019 | 88,265 | $9,581 | $116.40 | $99.24 - $133.12 |
| Q4 2018 | 79,109 | $9,249 | $125.24 | $109.50 - $133.95 |
| Q3 2018 | 82,880 | $10,745 | $126.95 | $115.25 - $140.32 |
| Q2 2018 | 79,343 | $9,839 | $107.98 | $92.00 - $136.65 |
| Q1 2018 | 78,789 | $7,387 | $99.25 | $88.80 - $108.45 |
| Q4 2017 | 76,765 | $7,634 | $109.11 | $95.50 - $121.40 |
| Q3 2017 | 75,968 | $8,087 | $105.66 | $95.65 - $114.70 |
| Q2 2017 | 77,843 | $8,601 | $105.57 | $98.05 - $112.45 |
| Q1 2017 | 74,079 | $7,571 | $103.21 | $91.75 - $112.00 |
| Q4 2016 | 74,351 | $7,912 | $93.06 | $83.53 - $108.75 |
| Q3 2016 | 67,274 | $5,905 | $90.73 | $85.13 - $96.25 |
| Q2 2016 | 66,142 | $6,240 | $87.97 | $81.96 - $94.35 |
| Q1 2016 | 76,310 | $6,391 | $80.09 | $72.30 - $88.00 |
| Q4 2015 | 74,521 | $6,176 | $86.71 | $78.13 - $94.18 |
| Q3 2015 | 83,543 | $7,039 | $81.19 | $74.57 - $88.00 |
| Q2 2015 | 76,505 | $6,145 | $68.50 | $61.65 - $80.34 |
| Q1 2015 | 67,693 | $4,291 | $61.65 | $56.04 - $67.90 |
| Q4 2014 | 68,330 | $3,966 | $59.42 | $54.07 - $63.69 |
| Q3 2014 | 74,137 | $4,501 | $66.40 | $60.68 - $75.50 |
| Q2 2014 | 69,982 | $5,097 | $71.81 | $67.09 - $77.75 |
| Q1 2014 | 71,685 | $5,594 | $78.13 | $73.04 - $84.00 |
| Q4 2013 | 70,179 | $5,649 | $73.58 | $67.32 - $81.00 |
| Q3 2013 | 66,986 | $4,717 | $72.80 | $68.50 - $77.50 |
| Q2 2013 | 72,265 | $5,206 | $76.01 | $70.25 - $80.50 |