Ticker: NPK CUSIP: 637215104 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 42,154 | $4,500 | $104.80 | $91.28 - $120.49 |
| Q3 2025 | 101,757 | $11,412 | $106.18 | $94.71 - $117.46 |
| Q2 2025 | 109,787 | $10,755 | $87.38 | $77.63 - $100.17 |
| Q1 2025 | 53,417 | $4,696 | $95.29 | $85.21 - $103.93 |
| Q4 2024 | 81,840 | $8,055 | $80.38 | $69.80 - $99.07 |
| Q3 2024 | 107,686 | $8,092 | $74.60 | $69.58 - $79.26 |
| Q2 2024 | 111,991 | $8,414 | $78.76 | $72.07 - $86.08 |
| Q1 2024 | 117,985 | $9,887 | $79.07 | $73.97 - $84.29 |
| Q4 2023 | 107,355 | $8,618 | $76.85 | $70.86 - $83.00 |
| Q3 2023 | 115,205 | $8,348 | $75.50 | $70.24 - $81.40 |
| Q2 2023 | 133,422 | $9,766 | $73.54 | $66.83 - $82.59 |
| Q1 2023 | 163,416 | $11,781 | $72.97 | $67.77 - $81.50 |
| Q4 2022 | 124,195 | $8,502 | $68.37 | $63.90 - $71.73 |
| Q3 2022 | 103,767 | $7 | $69.19 | $63.06 - $78.78 |
| Q2 2022 | 68,443 | $4 | $70.97 | $59.99 - $79.31 |
| Q1 2022 | 98,921 | $7,612 | $81.17 | $76.40 - $89.05 |
| Q4 2021 | 41,437 | $3,399 | $83.82 | $78.33 - $89.50 |
| Q3 2021 | 4,511 | $370 | $89.68 | $79.78 - $103.69 |
| Q2 2021 | 25,986 | $2,641 | $103.08 | $97.03 - $107.89 |
| Q1 2021 | 13,692 | $1,398 | $98.38 | $86.66 - $117.87 |
| Q4 2020 | 15,431 | $1,365 | $85.92 | $79.49 - $94.30 |
| Q3 2020 | 21,140 | $1,731 | $87.32 | $81.09 - $95.66 |
| Q2 2020 | 2,492 | $218 | $85.05 | $68.17 - $97.90 |
| Q1 2020 | 32,359 | $2,292 | $84.26 | $66.60 - $93.99 |
| Q4 2019 | 92,929 | $8,214 | $87.02 | $80.39 - $92.37 |
| Q3 2019 | 70,488 | $6,280 | $90.44 | $82.38 - $97.82 |
| Q2 2019 | 67,063 | $6,256 | $101.82 | $89.24 - $112.50 |
| Q1 2019 | 71,825 | $7,797 | $116.40 | $99.24 - $133.12 |
| Q4 2018 | 32,493 | $3,799 | $125.24 | $109.50 - $133.95 |
| Q3 2018 | 17,125 | $2,220 | $126.95 | $115.25 - $140.32 |
| Q2 2018 | 16,385 | $2,032 | $107.98 | $92.00 - $136.65 |
| Q1 2018 | 13,834 | $1,297 | $99.25 | $88.80 - $108.45 |
| Q4 2017 | 20,494 | $2,038 | $109.11 | $95.50 - $121.40 |
| Q3 2017 | 18,082 | $1,925 | $105.66 | $95.65 - $114.70 |
| Q2 2017 | 13,181 | $1,457 | $105.57 | $98.05 - $112.45 |
| Q1 2017 | 9,519 | $973 | $103.21 | $91.75 - $112.00 |
| Q4 2016 | 12,536 | $1,334 | $93.06 | $83.53 - $108.75 |
| Q3 2016 | 3,782 | $332 | $90.73 | $85.13 - $96.25 |
| Q2 2016 | 3,128 | $295 | $87.97 | $81.96 - $94.35 |
| Q1 2016 | 17,401 | $1,457 | $80.09 | $72.30 - $88.00 |
| Q4 2015 | 29,757 | $2,466 | $86.71 | $78.13 - $94.18 |
| Q3 2015 | 18,468 | $1,556 | $81.19 | $74.57 - $88.00 |
| Q4 2013 | 10,456 | $842 | $73.58 | $67.32 - $81.00 |
| Q3 2013 | 2,896 | $204 | $72.80 | $68.50 - $77.50 |
| Q2 2012 | 13,070 | $912 | — | — |