Ticker: NPK CUSIP: 637215104 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 24,589 | $2,626 | $104.80 | $91.28 - $120.49 |
| Q3 2025 | 23,519 | $2,637 | $106.18 | $94.71 - $117.46 |
| Q2 2025 | 28,190 | $2,762 | $87.38 | $77.63 - $100.17 |
| Q1 2025 | 29,984 | $2,636 | $95.29 | $85.21 - $103.93 |
| Q4 2024 | 38,031 | $3,743 | $80.38 | $69.80 - $99.07 |
| Q3 2024 | 33,103 | $2,487 | $74.60 | $69.58 - $79.26 |
| Q2 2024 | 34,208 | $2,570 | $78.76 | $72.07 - $86.08 |
| Q1 2024 | 25,166 | $2,109 | $79.07 | $73.97 - $84.29 |
| Q4 2023 | 31,415 | $2,522 | $76.85 | $70.86 - $83.00 |
| Q3 2023 | 28,442 | $2,061 | $75.50 | $70.24 - $81.40 |
| Q2 2023 | 29,305 | $2,145 | $73.54 | $66.83 - $82.59 |
| Q1 2023 | 35,529 | $2,561 | $72.97 | $67.77 - $81.50 |
| Q4 2022 | 33,329 | $2,282 | $68.37 | $63.90 - $71.73 |
| Q3 2022 | 36,663 | $2,384 | $69.19 | $63.06 - $78.78 |
| Q2 2022 | 39,439 | $2,588 | $70.97 | $59.99 - $79.31 |
| Q1 2022 | 37,827 | $2,911 | $81.17 | $76.40 - $89.05 |
| Q4 2021 | 35,227 | $2,890 | $83.82 | $78.33 - $89.50 |
| Q3 2021 | 30,737 | $2,523 | $89.68 | $79.78 - $103.69 |
| Q2 2021 | 30,462 | $3,097 | $103.08 | $97.03 - $107.89 |
| Q1 2021 | 29,893 | $3,051 | $98.38 | $86.66 - $117.87 |
| Q4 2020 | 30,598 | $2,705 | $85.92 | $79.49 - $94.30 |
| Q3 2020 | 30,415 | $2,490 | $87.32 | $81.09 - $95.66 |
| Q2 2020 | 32,165 | $2,811 | $85.05 | $68.17 - $97.90 |
| Q1 2020 | 41,039 | $2,906 | $84.26 | $66.60 - $93.99 |
| Q4 2019 | 44,209 | $3,907 | $87.02 | $80.39 - $92.37 |
| Q3 2019 | 42,768 | $3,810 | $90.44 | $82.38 - $97.82 |
| Q2 2019 | 47,136 | $4,398 | $101.82 | $89.24 - $112.50 |
| Q1 2019 | 81,506 | $8,848 | $116.40 | $99.24 - $133.12 |
| Q4 2018 | 65,078 | $7,609 | $125.24 | $109.50 - $133.95 |
| Q3 2018 | 48,600 | $6,307 | $126.95 | $115.25 - $140.32 |
| Q2 2018 | 32,890 | $4,079 | $107.98 | $92.00 - $136.65 |
| Q1 2018 | 31,622 | $2,964 | $99.25 | $88.80 - $108.45 |
| Q4 2017 | 30,816 | $3,065 | $109.11 | $95.50 - $121.40 |
| Q3 2017 | 31,317 | $3,333 | $105.66 | $95.65 - $114.70 |
| Q2 2017 | 32,094 | $3,547 | $105.57 | $98.05 - $112.45 |
| Q1 2017 | 31,877 | $3,257 | $103.21 | $91.75 - $112.00 |
| Q4 2016 | 28,957 | $3,081 | $93.06 | $83.53 - $108.75 |
| Q3 2016 | 26,177 | $2,298 | $90.73 | $85.13 - $96.25 |
| Q2 2016 | 26,092 | $2,462 | $87.97 | $81.96 - $94.35 |
| Q1 2016 | 28,611 | $2,396 | $80.09 | $72.30 - $88.00 |
| Q4 2015 | 28,659 | $2,374 | $86.71 | $78.13 - $94.18 |
| Q3 2015 | 29,003 | $2,444 | $81.19 | $74.57 - $88.00 |
| Q2 2015 | 27,798 | $2,233 | $68.50 | $61.65 - $80.34 |
| Q1 2015 | 24,273 | $1,539 | $61.65 | $56.04 - $67.90 |
| Q4 2014 | 22,632 | $1,313 | $59.42 | $54.07 - $63.69 |
| Q3 2014 | 22,170 | $1,346 | $66.40 | $60.68 - $75.50 |
| Q2 2014 | 21,193 | $1,544 | $71.81 | $67.09 - $77.75 |
| Q1 2014 | 20,205 | $1,577 | $78.13 | $73.04 - $84.00 |
| Q4 2013 | 19,718 | $1,588 | $73.58 | $67.32 - $81.00 |
| Q3 2013 | 19,009 | $1,339 | $72.80 | $68.50 - $77.50 |
| Q2 2013 | 18,392 | $1,325 | $76.01 | $70.25 - $80.50 |