Ticker: NPK CUSIP: 637215104 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 9,046 | $966 | $104.80 | $91.28 - $120.49 |
| Q3 2025 | 8,805 | $987 | $106.18 | $94.71 - $117.46 |
| Q2 2025 | 8,915 | $873 | $87.38 | $77.63 - $100.17 |
| Q1 2025 | 8,915 | $784 | $95.29 | $85.21 - $103.93 |
| Q4 2024 | 8,915 | $877 | $80.38 | $69.80 - $99.07 |
| Q3 2024 | 8,715 | $655 | $74.60 | $69.58 - $79.26 |
| Q2 2024 | 8,195 | $616 | $78.76 | $72.07 - $86.08 |
| Q1 2024 | 8,000 | $670 | $79.07 | $73.97 - $84.29 |
| Q4 2023 | 7,800 | $626 | $76.85 | $70.86 - $83.00 |
| Q3 2023 | 7,695 | $558 | $75.50 | $70.24 - $81.40 |
| Q2 2023 | 7,695 | $563 | $73.54 | $66.83 - $82.59 |
| Q1 2023 | 7,195 | $519 | $72.97 | $67.77 - $81.50 |
| Q4 2022 | 6,695 | $458 | $68.37 | $63.90 - $71.73 |
| Q3 2022 | 6,552 | $427 | $69.19 | $63.06 - $78.78 |
| Q2 2022 | 5,502 | $362 | $70.97 | $59.99 - $79.31 |
| Q4 2020 | 2,502 | $222 | $85.92 | $79.49 - $94.30 |
| Q3 2020 | 17,902 | $1,466 | $87.32 | $81.09 - $95.66 |
| Q2 2020 | 36,202 | $3,164 | $85.05 | $68.17 - $97.90 |
| Q1 2020 | 36,202 | $2,565 | $84.26 | $66.60 - $93.99 |
| Q4 2019 | 36,202 | $3,201 | $87.02 | $80.39 - $92.37 |
| Q3 2019 | 35,902 | $3,200 | $90.44 | $82.38 - $97.82 |
| Q2 2019 | 33,802 | $3,154 | $101.82 | $89.24 - $112.50 |
| Q1 2019 | 32,602 | $3,540 | $116.40 | $99.24 - $133.12 |
| Q4 2018 | 28,102 | $3,286 | $125.24 | $109.50 - $133.95 |
| Q3 2018 | 25,502 | $3,307 | $126.95 | $115.25 - $140.32 |
| Q2 2018 | 26,502 | $3,287 | $107.98 | $92.00 - $136.65 |
| Q1 2018 | 28,002 | $2,626 | $99.25 | $88.80 - $108.45 |
| Q4 2017 | 29,102 | $2,895 | $109.11 | $95.50 - $121.40 |
| Q3 2017 | 32,502 | $3,460 | $105.66 | $95.65 - $114.70 |
| Q2 2017 | 32,302 | $3,570 | $105.57 | $98.05 - $112.45 |
| Q1 2017 | 32,302 | $3,302 | $103.21 | $91.75 - $112.00 |
| Q4 2016 | 32,302 | $3,437 | $93.06 | $83.53 - $108.75 |
| Q3 2016 | 27,903 | $2,450 | $90.73 | $85.13 - $96.25 |
| Q2 2016 | 6,302 | $595 | $87.97 | $81.96 - $94.35 |
| Q1 2016 | 6,302 | $528 | $80.09 | $72.30 - $88.00 |
| Q4 2015 | 6,302 | $523 | $86.71 | $78.13 - $94.18 |
| Q3 2015 | 6,303 | $532 | $81.19 | $74.57 - $88.00 |
| Q2 2015 | 6,403 | $515 | $68.50 | $61.65 - $80.34 |
| Q1 2014 | 5,002 | $391 | $78.13 | $73.04 - $84.00 |
| Q4 2013 | 5,002 | $403 | $73.58 | $67.32 - $81.00 |
| Q3 2013 | 5,502 | $388 | $72.80 | $68.50 - $77.50 |
| Q2 2013 | 5,505 | $397 | $76.01 | $70.25 - $80.50 |