Ticker: NPK CUSIP: 637215104 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 370,551 | $39,560 | $104.80 | $91.28 - $120.49 |
| Q3 2025 | 373,845 | $41,927 | $106.18 | $94.71 - $117.46 |
| Q2 2025 | 362,076 | $35,469 | $87.38 | $77.63 - $100.17 |
| Q1 2025 | 355,095 | $31,216 | $95.29 | $85.21 - $103.93 |
| Q4 2024 | 364,775 | $35,901 | $80.38 | $69.80 - $99.07 |
| Q3 2024 | 337,788 | $25,381 | $74.60 | $69.58 - $79.26 |
| Q2 2024 | 493,376 | $37,067 | $78.76 | $72.07 - $86.08 |
| Q1 2024 | 607,135 | $50,878 | $79.07 | $73.97 - $84.29 |
| Q4 2023 | 603,074 | $48,415 | $76.85 | $70.86 - $83.00 |
| Q3 2023 | 606,635 | $43,957 | $75.50 | $70.24 - $81.40 |
| Q2 2023 | 607,159 | $44,444 | $73.54 | $66.83 - $82.59 |
| Q1 2023 | 615,437 | $44,367 | $72.97 | $67.77 - $81.50 |
| Q4 2022 | 603,881 | $41,342 | $68.37 | $63.90 - $71.73 |
| Q3 2022 | 585,255 | $38,070 | $69.19 | $63.06 - $78.78 |
| Q2 2022 | 572,141 | $37,556 | $70.97 | $59.99 - $79.31 |
| Q1 2022 | 561,832 | $43,234 | $81.17 | $76.40 - $89.05 |
| Q4 2021 | 547,166 | $44,885 | $83.82 | $78.33 - $89.50 |
| Q3 2021 | 557,405 | $45,753 | $89.68 | $79.78 - $103.69 |
| Q2 2021 | 563,825 | $57,313 | $103.08 | $97.03 - $107.89 |
| Q1 2021 | 573,574 | $58,545 | $98.38 | $86.66 - $117.87 |
| Q4 2020 | 581,566 | $51,428 | $85.92 | $79.49 - $94.30 |
| Q3 2020 | 566,599 | $46,380 | $87.32 | $81.09 - $95.66 |
| Q2 2020 | 581,447 | $50,813 | $85.05 | $68.17 - $97.90 |
| Q1 2020 | 604,635 | $42,815 | $84.26 | $66.60 - $93.99 |
| Q4 2019 | 619,974 | $54,800 | $87.02 | $80.39 - $92.37 |
| Q3 2019 | 604,554 | $53,861 | $90.44 | $82.38 - $97.82 |
| Q2 2019 | 628,554 | $58,638 | $101.82 | $89.24 - $112.50 |
| Q1 2019 | 631,697 | $68,570 | $116.40 | $99.24 - $133.12 |
| Q4 2018 | 584,871 | $68,383 | $125.24 | $109.50 - $133.95 |
| Q3 2018 | 564,412 | $73,177 | $126.95 | $115.25 - $140.32 |
| Q2 2018 | 551,249 | $68,355 | $107.98 | $92.00 - $136.65 |
| Q1 2018 | 522,541 | $48,988 | $99.25 | $88.80 - $108.45 |
| Q4 2017 | 496,894 | $49,416 | $109.11 | $95.50 - $121.40 |
| Q3 2017 | 472,611 | $50,310 | $105.66 | $95.65 - $114.70 |
| Q2 2017 | 467,345 | $51,642 | $105.57 | $98.05 - $112.45 |
| Q1 2017 | 496,241 | $50,716 | $103.21 | $91.75 - $112.00 |
| Q4 2016 | 477,731 | $50,830 | $93.06 | $83.53 - $108.75 |
| Q3 2016 | 461,345 | $40,500 | $90.73 | $85.13 - $96.25 |
| Q2 2016 | 470,996 | $44,438 | $87.97 | $81.96 - $94.35 |
| Q1 2016 | 458,745 | $38,415 | $80.09 | $72.30 - $88.00 |
| Q4 2015 | 447,273 | $37,062 | $86.71 | $78.13 - $94.18 |
| Q3 2015 | 416,606 | $35,103 | $81.19 | $74.57 - $88.00 |
| Q2 2015 | 401,975 | $32,286 | $68.50 | $61.65 - $80.34 |
| Q1 2015 | 391,172 | $24,796 | $61.65 | $56.04 - $67.90 |
| Q4 2014 | 375,014 | $21,765 | $59.42 | $54.07 - $63.69 |
| Q3 2014 | 370,020 | $22,463 | $66.40 | $60.68 - $75.50 |
| Q2 2014 | 361,474 | $26,330 | $71.81 | $67.09 - $77.75 |
| Q1 2014 | 348,823 | $27,222 | $78.13 | $73.04 - $84.00 |
| Q4 2013 | 325,357 | $26,191 | $73.58 | $67.32 - $81.00 |
| Q3 2013 | 297,488 | $20,946 | $72.80 | $68.50 - $77.50 |
| Q2 2013 | 289,751 | $20,871 | $76.01 | $70.25 - $80.50 |