Ticker: NPK CUSIP: 637215104 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 8,768 | $936 | $104.80 | $91.28 - $120.49 |
| Q3 2025 | 11,109 | $835 | $106.18 | $94.71 - $117.46 |
| Q2 2025 | 10,708 | $1,049 | $87.38 | $77.63 - $100.17 |
| Q1 2025 | 7,714 | $678 | $95.29 | $85.21 - $103.93 |
| Q4 2024 | 10,205 | $1,004 | $80.38 | $69.80 - $99.07 |
| Q3 2024 | 11,109 | $1 | $74.60 | $69.58 - $79.26 |
| Q2 2024 | 2,766 | $208 | $78.76 | $72.07 - $86.08 |
| Q1 2024 | 6,873 | $576 | $79.07 | $73.97 - $84.29 |
| Q4 2023 | 12,419 | $997 | $76.85 | $70.86 - $83.00 |
| Q3 2023 | 6,851 | $496 | $75.50 | $70.24 - $81.40 |
| Q2 2023 | 4,668 | $0 | $73.54 | $66.83 - $82.59 |
| Q1 2023 | 5,400 | $0 | $72.97 | $67.77 - $81.50 |
| Q4 2022 | 5,367 | $0 | $68.37 | $63.90 - $71.73 |
| Q3 2022 | 2,070 | $135 | $69.19 | $63.06 - $78.78 |
| Q2 2022 | 1,585 | $104 | $70.97 | $59.99 - $79.31 |
| Q1 2022 | 6,390 | $492 | $81.17 | $76.40 - $89.05 |
| Q4 2021 | 6,675 | $548 | $83.82 | $78.33 - $89.50 |
| Q3 2021 | 5,206 | $427 | $89.68 | $79.78 - $103.69 |
| Q2 2021 | 4,263 | $433 | $103.08 | $97.03 - $107.89 |
| Q1 2021 | 6,582 | $672 | $98.38 | $86.66 - $117.87 |
| Q4 2020 | 6,212 | $550 | $85.92 | $79.49 - $94.30 |
| Q3 2020 | 6,276 | $514 | $87.32 | $81.09 - $95.66 |
| Q2 2020 | 4,635 | $405 | $85.05 | $68.17 - $97.90 |
| Q1 2020 | 4,141 | $293 | $84.26 | $66.60 - $93.99 |
| Q4 2019 | 7,642 | $676 | $87.02 | $80.39 - $92.37 |
| Q3 2019 | 7,153 | $637 | $90.44 | $82.38 - $97.82 |
| Q2 2019 | 11,680 | $1,088 | $101.82 | $89.24 - $112.50 |
| Q1 2019 | 3,939 | $428 | $116.40 | $99.24 - $133.12 |
| Q4 2018 | 4,637 | $542 | $125.24 | $109.50 - $133.95 |
| Q3 2018 | 6,373 | $827 | $126.95 | $115.25 - $140.32 |
| Q2 2018 | 3,125 | $387 | $107.98 | $92.00 - $136.65 |
| Q1 2018 | 2,232 | $210 | $99.25 | $88.80 - $108.45 |
| Q4 2017 | 1,484 | $147 | $109.11 | $95.50 - $121.40 |
| Q3 2017 | 301 | $32 | $105.66 | $95.65 - $114.70 |
| Q2 2017 | 886 | $98 | $105.57 | $98.05 - $112.45 |
| Q1 2017 | 2,731 | $279 | $103.21 | $91.75 - $112.00 |
| Q4 2016 | 160 | $17 | $93.06 | $83.53 - $108.75 |
| Q3 2016 | 125 | $11 | $90.73 | $85.13 - $96.25 |
| Q1 2016 | 96 | $8 | $80.09 | $72.30 - $88.00 |
| Q3 2015 | 25 | $2 | $81.19 | $74.57 - $88.00 |
| Q2 2015 | 92 | $8 | $68.50 | $61.65 - $80.34 |
| Q1 2015 | 147 | $9 | $61.65 | $56.04 - $67.90 |
| Q4 2014 | 275 | $16 | $59.42 | $54.07 - $63.69 |
| Q3 2014 | 101 | $6 | $66.40 | $60.68 - $75.50 |
| Q2 2014 | 83 | $6 | $71.81 | $67.09 - $77.75 |
| Q1 2014 | 202 | $16 | $78.13 | $73.04 - $84.00 |
| Q4 2013 | 114 | $9 | $73.58 | $67.32 - $81.00 |
| Q3 2013 | 2,326 | $163 | $72.80 | $68.50 - $77.50 |
| Q2 2013 | 3,453 | $249 | $76.01 | $70.25 - $80.50 |