Ticker: NPK CUSIP: 637215104 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 348,255 | $37,180 | $104.80 | $91.28 - $120.49 |
| Q3 2025 | 325,510 | $36,506 | $106.18 | $94.71 - $117.46 |
| Q2 2025 | 284,228 | $27,843 | $87.38 | $77.63 - $100.17 |
| Q1 2025 | 289,818 | $25,478 | $95.29 | $85.21 - $103.93 |
| Q4 2024 | 268,219 | $26,398 | $80.38 | $69.80 - $99.07 |
| Q3 2024 | 271,808 | $20,424 | $74.60 | $69.58 - $79.26 |
| Q2 2024 | 291,163 | $21,875 | $78.76 | $72.07 - $86.08 |
| Q1 2024 | 303,516 | $25,435 | $79.07 | $73.97 - $84.29 |
| Q4 2023 | 273,528 | $21,959 | $76.85 | $70.86 - $83.00 |
| Q3 2023 | 259,440 | $18,799 | $75.50 | $70.24 - $81.40 |
| Q2 2023 | 284,138 | $20,799 | $73.54 | $66.83 - $82.59 |
| Q1 2023 | 276,388 | $19,925 | $72.97 | $67.77 - $81.50 |
| Q4 2022 | 256,575 | $17,565 | $68.37 | $63.90 - $71.73 |
| Q3 2022 | 262,471 | $17,074 | $69.19 | $63.06 - $78.78 |
| Q2 2022 | 309,432 | $20,311 | $70.97 | $59.99 - $79.31 |
| Q1 2022 | 309,576 | $23,822 | $81.17 | $76.40 - $89.05 |
| Q4 2021 | 263,746 | $21,635 | $83.82 | $78.33 - $89.50 |
| Q3 2021 | 241,442 | $19,818 | $89.68 | $79.78 - $103.69 |
| Q2 2021 | 264,777 | $26,915 | $103.08 | $97.03 - $107.89 |
| Q1 2021 | 245,491 | $25,057 | $98.38 | $86.66 - $117.87 |
| Q4 2020 | 244,236 | $21,598 | $85.92 | $79.49 - $94.30 |
| Q3 2020 | 246,226 | $20,156 | $87.32 | $81.09 - $95.66 |
| Q2 2020 | 335,437 | $29,314 | $85.05 | $68.17 - $97.90 |
| Q1 2020 | 336,705 | $23,842 | $84.26 | $66.60 - $93.99 |
| Q4 2019 | 328,818 | $29,064 | $87.02 | $80.39 - $92.37 |
| Q3 2019 | 469,459 | $41,824 | $90.44 | $82.38 - $97.82 |
| Q2 2019 | 410,235 | $38,271 | $101.82 | $89.24 - $112.50 |
| Q1 2019 | 271,651 | $29,488 | $116.40 | $99.24 - $133.12 |
| Q4 2018 | 264,303 | $30,902 | $125.24 | $109.50 - $133.95 |
| Q3 2018 | 312,979 | $40,579 | $126.95 | $115.25 - $140.32 |
| Q2 2018 | 260,479 | $32,298 | $107.98 | $92.00 - $136.65 |
| Q1 2018 | 304,603 | $28,560 | $99.25 | $88.80 - $108.45 |
| Q4 2017 | 211,140 | $21,003 | $109.11 | $95.50 - $121.40 |
| Q3 2017 | 192,411 | $20,484 | $105.66 | $95.65 - $114.70 |
| Q2 2017 | 182,076 | $20,115 | $105.57 | $98.05 - $112.45 |
| Q1 2017 | 179,260 | $18,320 | $103.21 | $91.75 - $112.00 |
| Q4 2016 | 162,574 | $17,299 | $93.06 | $83.53 - $108.75 |
| Q3 2016 | 140,817 | $12,364 | $90.73 | $85.13 - $96.25 |
| Q2 2016 | 134,564 | $12,692 | $87.97 | $81.96 - $94.35 |
| Q1 2016 | 115,852 | $9,694 | $80.09 | $72.30 - $88.00 |
| Q4 2015 | 123,593 | $10,243 | $86.71 | $78.13 - $94.18 |
| Q3 2015 | 121,144 | $10,207 | $81.19 | $74.57 - $88.00 |
| Q2 2015 | 121,497 | $9,757 | $68.50 | $61.65 - $80.34 |
| Q1 2015 | 128,645 | $8,149 | $61.65 | $56.04 - $67.90 |
| Q4 2014 | 116,198 | $6,740 | $59.42 | $54.07 - $63.69 |
| Q3 2014 | 117,334 | $7,118 | $66.40 | $60.68 - $75.50 |
| Q2 2014 | 120,290 | $8,764 | $71.81 | $67.09 - $77.75 |
| Q1 2014 | 119,848 | $9,355 | $78.13 | $73.04 - $84.00 |
| Q4 2013 | 114,225 | $9,193 | $73.58 | $67.32 - $81.00 |
| Q3 2013 | 112,459 | $7,911 | $72.80 | $68.50 - $77.50 |
| Q2 2013 | 118,159 | $8,511 | $76.01 | $70.25 - $80.50 |