Ticker: NPK CUSIP: 637215104 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 3,838 | $410 | $104.80 | $91.28 - $120.49 |
| Q3 2025 | 9,336 | $1,047 | $106.18 | $94.71 - $117.46 |
| Q2 2025 | 5,547 | $543 | $87.38 | $77.63 - $100.17 |
| Q1 2025 | 3,280 | $288 | $95.29 | $85.21 - $103.93 |
| Q4 2021 | 7,074 | $580,280 | $83.82 | $78.33 - $89.50 |
| Q3 2021 | 8,058 | $661,401 | $89.68 | $79.78 - $103.69 |
| Q2 2021 | 7,071 | $718,767 | $103.08 | $97.03 - $107.89 |
| Q1 2021 | 5,638 | $575,471 | $98.38 | $86.66 - $117.87 |
| Q4 2020 | 2,173 | $192,158 | $85.92 | $79.49 - $94.30 |
| Q3 2020 | 1,293 | $105,845 | $87.32 | $81.09 - $95.66 |
| Q2 2020 | 3,594 | $314,080 | $85.05 | $68.17 - $97.90 |
| Q1 2020 | 2,115 | $149,763 | $84.26 | $66.60 - $93.99 |
| Q4 2019 | 1,932 | $170,769 | $87.02 | $80.39 - $92.37 |
| Q3 2019 | 908 | $80,894 | $90.44 | $82.38 - $97.82 |
| Q2 2019 | 666 | $62,131 | $101.82 | $89.24 - $112.50 |
| Q1 2019 | 1,253 | $136,013 | $116.40 | $99.24 - $133.12 |
| Q4 2018 | 532 | $62,201 | $125.24 | $109.50 - $133.95 |
| Q3 2018 | 284 | $36,821 | $126.95 | $115.25 - $140.32 |
| Q2 2018 | 260 | $32,240 | $107.98 | $92.00 - $136.65 |
| Q1 2018 | 1,614 | $151,312 | $99.25 | $88.80 - $108.45 |
| Q4 2017 | 2,073 | $206,160 | $109.11 | $95.50 - $121.40 |
| Q3 2017 | 2,769 | $294,760 | $105.66 | $95.65 - $114.70 |
| Q2 2017 | 1,610 | $177,905 | $105.57 | $98.05 - $112.45 |
| Q1 2017 | 1,069 | $109,252 | $103.21 | $91.75 - $112.00 |
| Q4 2016 | 1,186 | $126,190 | $93.06 | $83.53 - $108.75 |
| Q3 2016 | 770 | $67,598 | $90.73 | $85.13 - $96.25 |
| Q2 2016 | 1,512 | $142,657 | $87.97 | $81.96 - $94.35 |
| Q1 2016 | 561 | $46,978 | $80.09 | $72.30 - $88.00 |
| Q4 2015 | 451 | $37,370 | $86.71 | $78.13 - $94.18 |
| Q3 2015 | 985 | $82,996 | $81.19 | $74.57 - $88.00 |
| Q2 2015 | 404 | $32,449 | $68.50 | $61.65 - $80.34 |
| Q1 2015 | 119 | $7,543 | $61.65 | $56.04 - $67.90 |
| Q3 2014 | 277 | $16,817 | $66.40 | $60.68 - $75.50 |