Ticker: NPK CUSIP: 637215104 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 4,892 | $522 | $104.80 | $91.28 - $120.49 |
| Q3 2025 | 4,892 | $549 | $106.18 | $94.71 - $117.46 |
| Q2 2025 | 3,782 | $370 | $87.38 | $77.63 - $100.17 |
| Q1 2025 | 3,472 | $305 | $95.29 | $85.21 - $103.93 |
| Q4 2024 | 3,852 | $379 | $80.38 | $69.80 - $99.07 |
| Q3 2024 | 4,772 | $359 | $74.60 | $69.58 - $79.26 |
| Q2 2024 | 4,772 | $359 | $78.76 | $72.07 - $86.08 |
| Q4 2021 | 3,195 | $262 | $83.82 | $78.33 - $89.50 |
| Q3 2021 | 3,212 | $264 | $89.68 | $79.78 - $103.69 |
| Q2 2021 | 3,652 | $371 | $103.08 | $97.03 - $107.89 |
| Q1 2021 | 7,279 | $743 | $98.38 | $86.66 - $117.87 |
| Q4 2020 | 5,550 | $491 | $85.92 | $79.49 - $94.30 |
| Q3 2020 | 7,504 | $614 | $87.32 | $81.09 - $95.66 |
| Q2 2020 | 8,506 | $743 | $85.05 | $68.17 - $97.90 |
| Q1 2020 | 7,950 | $563 | $84.26 | $66.60 - $93.99 |
| Q4 2019 | 5,850 | $517 | $87.02 | $80.39 - $92.37 |
| Q3 2019 | 23,028 | $2,052 | $90.44 | $82.38 - $97.82 |
| Q2 2019 | 23,828 | $2,223 | $101.82 | $89.24 - $112.50 |
| Q1 2019 | 4,900 | $532 | $116.40 | $99.24 - $133.12 |
| Q4 2018 | 4,700 | $550 | $125.24 | $109.50 - $133.95 |
| Q3 2018 | 4,400 | $570 | $126.95 | $115.25 - $140.32 |
| Q2 2018 | 4,700 | $583 | $107.98 | $92.00 - $136.65 |
| Q1 2018 | 3,400 | $319 | $99.25 | $88.80 - $108.45 |
| Q4 2017 | 3,000 | $298 | $109.11 | $95.50 - $121.40 |
| Q3 2017 | 19,560 | $2,082 | $105.66 | $95.65 - $114.70 |
| Q2 2017 | 13,320 | $1,472 | $105.57 | $98.05 - $112.45 |
| Q1 2017 | 2,100 | $215 | $103.21 | $91.75 - $112.00 |
| Q4 2016 | 2,400 | $255 | $93.06 | $83.53 - $108.75 |
| Q3 2016 | 3,000 | $263 | $90.73 | $85.13 - $96.25 |
| Q1 2015 | 1,000 | $63 | $61.65 | $56.04 - $67.90 |
| Q4 2014 | 978 | $57 | $59.42 | $54.07 - $63.69 |
| Q3 2014 | 1,378 | $84 | $66.40 | $60.68 - $75.50 |
| Q2 2014 | 1,878 | $137 | $71.81 | $67.09 - $77.75 |
| Q1 2014 | 4,801 | $375 | $78.13 | $73.04 - $84.00 |
| Q4 2013 | 6,775 | $545 | $73.58 | $67.32 - $81.00 |
| Q3 2013 | 8,401 | $592 | $72.80 | $68.50 - $77.50 |
| Q2 2013 | 8,360 | $602 | $76.01 | $70.25 - $80.50 |