Ticker: NPK CUSIP: 637215104 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 137,752 | $14,709 | $104.80 | $91.28 - $120.49 |
| Q3 2025 | 136,208 | $15,279 | $106.18 | $94.71 - $117.46 |
| Q2 2025 | 123,185 | $12,070 | $87.38 | $77.63 - $100.17 |
| Q1 2025 | 121,522 | $10,686 | $95.29 | $85.21 - $103.93 |
| Q4 2024 | 124,569 | $12,263 | $80.38 | $69.80 - $99.07 |
| Q3 2024 | 123,146 | $9,255 | $74.60 | $69.58 - $79.26 |
| Q2 2024 | 120,319 | $9,042 | $78.76 | $72.07 - $86.08 |
| Q1 2024 | 116,431 | $9,758 | $79.07 | $73.97 - $84.29 |
| Q4 2023 | 115,235 | $9,252 | $76.85 | $70.86 - $83.00 |
| Q3 2023 | 109,558 | $7,940 | $75.50 | $70.24 - $81.40 |
| Q2 2023 | 102,171 | $7,479 | $73.54 | $66.83 - $82.59 |
| Q1 2023 | 98,416 | $7,095 | $72.97 | $67.77 - $81.50 |
| Q4 2022 | 92,619 | $6 | $68.37 | $63.90 - $71.73 |
| Q3 2022 | 90,442 | $5,883 | $69.19 | $63.06 - $78.78 |
| Q2 2022 | 87,765 | $5,760 | $70.97 | $59.99 - $79.31 |
| Q1 2022 | 88,585 | $6,816 | $81.17 | $76.40 - $89.05 |
| Q4 2021 | 87,436 | $7,172 | $83.82 | $78.33 - $89.50 |
| Q3 2021 | 87,338 | $7,168 | $89.68 | $79.78 - $103.69 |
| Q2 2021 | 88,763 | $9,022 | $103.08 | $97.03 - $107.89 |
| Q1 2021 | 86,650 | $8,844 | $98.38 | $86.66 - $117.87 |
| Q4 2020 | 76,849 | $6,795 | $85.92 | $79.49 - $94.30 |
| Q3 2020 | 77,269 | $6,325 | $87.32 | $81.09 - $95.66 |
| Q2 2020 | 77,370 | $6,761 | $85.05 | $68.17 - $97.90 |
| Q1 2020 | 79,296 | $5,614 | $84.26 | $66.60 - $93.99 |
| Q4 2019 | 72,630 | $6,419 | $87.02 | $80.39 - $92.37 |
| Q3 2019 | 67,141 | $5,981 | $90.44 | $82.38 - $97.82 |
| Q2 2019 | 68,813 | $6,419 | $101.82 | $89.24 - $112.50 |
| Q1 2019 | 66,049 | $7,168 | $116.40 | $99.24 - $133.12 |
| Q4 2018 | 58,970 | $6,893 | $125.24 | $109.50 - $133.95 |
| Q3 2018 | 51,903 | $6,729 | $126.95 | $115.25 - $140.32 |
| Q2 2018 | 48,241 | $5,981 | $107.98 | $92.00 - $136.65 |
| Q1 2018 | 45,976 | $4,310 | $99.25 | $88.80 - $108.45 |
| Q4 2017 | 42,291 | $4,205 | $109.11 | $95.50 - $121.40 |
| Q3 2017 | 40,248 | $4,284 | $105.66 | $95.65 - $114.70 |
| Q2 2017 | 39,640 | $4,380 | $105.57 | $98.05 - $112.45 |
| Q1 2017 | 38,397 | $3,924 | $103.21 | $91.75 - $112.00 |
| Q4 2016 | 37,725 | $4,013 | $93.06 | $83.53 - $108.75 |
| Q3 2016 | 35,227 | $3,092 | $90.73 | $85.13 - $96.25 |
| Q2 2016 | 34,819 | $3,285 | $87.97 | $81.96 - $94.35 |
| Q1 2016 | 34,372 | $2,878 | $80.09 | $72.30 - $88.00 |
| Q4 2015 | 30,418 | $2,520 | $86.71 | $78.13 - $94.18 |
| Q3 2015 | 30,079 | $2,534 | $81.19 | $74.57 - $88.00 |
| Q2 2015 | 28,470 | $2,286 | $68.50 | $61.65 - $80.34 |
| Q1 2015 | 28,626 | $1,814 | $61.65 | $56.04 - $67.90 |
| Q4 2014 | 28,340 | $1,644 | $59.42 | $54.07 - $63.69 |
| Q3 2014 | 28,207 | $1,712 | $66.40 | $60.68 - $75.50 |
| Q2 2014 | 29,559 | $2,153 | $71.81 | $67.09 - $77.75 |
| Q1 2014 | 26,568 | $2,073 | $78.13 | $73.04 - $84.00 |
| Q4 2013 | 22,305 | $1,795 | $73.58 | $67.32 - $81.00 |
| Q3 2013 | 19,356 | $1,363 | $72.80 | $68.50 - $77.50 |
| Q2 2013 | 18,706 | $1,347 | $76.01 | $70.25 - $80.50 |