Ticker: NPK CUSIP: 637215104 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 320,124 | $34,176 | $104.80 | $91.28 - $120.49 |
| Q3 2025 | 322,798 | $36,202 | $106.18 | $94.71 - $117.46 |
| Q2 2025 | 335,191 | $32,835 | $87.38 | $77.63 - $100.17 |
| Q1 2025 | 341,117 | $29,988 | $95.29 | $85.21 - $103.93 |
| Q4 2024 | 356,153 | $35,053 | $80.38 | $69.80 - $99.07 |
| Q3 2024 | 356,919 | $26,819 | $74.60 | $69.58 - $79.26 |
| Q2 2024 | 344,347 | $25,871 | $78.76 | $72.07 - $86.08 |
| Q1 2024 | 328,059 | $27,491 | $79.07 | $73.97 - $84.29 |
| Q4 2023 | 322,275 | $25,872 | $76.85 | $70.86 - $83.00 |
| Q3 2023 | 312,741 | $22,661 | $75.50 | $70.24 - $81.40 |
| Q2 2023 | 316,061 | $23,136 | $73.54 | $66.83 - $82.59 |
| Q1 2023 | 308,805 | $22,262 | $72.97 | $67.77 - $81.50 |
| Q4 2022 | 295,391 | $20 | $68.37 | $63.90 - $71.73 |
| Q3 2022 | 291,014 | $18,931 | $69.19 | $63.06 - $78.78 |
| Q2 2022 | 290,395 | $19,061 | $70.97 | $59.99 - $79.31 |
| Q1 2022 | 275,668 | $21,213 | $81.17 | $76.40 - $89.05 |
| Q4 2021 | 260,128 | $21,338 | $83.82 | $78.33 - $89.50 |
| Q3 2021 | 276,116 | $22,664 | $89.68 | $79.78 - $103.69 |
| Q2 2021 | 282,711 | $28,738 | $103.08 | $97.03 - $107.89 |
| Q1 2021 | 277,352 | $28,309 | $98.38 | $86.66 - $117.87 |
| Q4 2020 | 281,624 | $24,904 | $85.92 | $79.49 - $94.30 |
| Q3 2020 | 282,032 | $23,087 | $87.32 | $81.09 - $95.66 |
| Q2 2020 | 281,090 | $24,564 | $85.05 | $68.17 - $97.90 |
| Q1 2020 | 279,684 | $19,804 | $84.26 | $66.60 - $93.99 |
| Q4 2019 | 271,490 | $23,997 | $87.02 | $80.39 - $92.37 |
| Q3 2019 | 278,708 | $24,830 | $90.44 | $82.38 - $97.82 |
| Q2 2019 | 266,434 | $24,856 | $101.82 | $89.24 - $112.50 |
| Q1 2019 | 247,354 | $26,850 | $116.40 | $99.24 - $133.12 |
| Q4 2018 | 246,139 | $28,779 | $125.24 | $109.50 - $133.95 |
| Q3 2018 | 236,588 | $30,673 | $126.95 | $115.25 - $140.32 |
| Q2 2018 | 224,685 | $27,861 | $107.98 | $92.00 - $136.65 |
| Q1 2018 | 226,816 | $21,264 | $99.25 | $88.80 - $108.45 |
| Q4 2017 | 216,562 | $21,537 | $109.11 | $95.50 - $121.40 |
| Q3 2017 | 195,885 | $20,852 | $105.66 | $95.65 - $114.70 |
| Q2 2017 | 196,659 | $21,731 | $105.57 | $98.05 - $112.45 |
| Q1 2017 | 196,793 | $20,112 | $103.21 | $91.75 - $112.00 |
| Q4 2016 | 170,255 | $18,115 | $93.06 | $83.53 - $108.75 |
| Q3 2016 | 154,251 | $13,541 | $90.73 | $85.13 - $96.25 |
| Q2 2016 | 151,322 | $14,276 | $87.97 | $81.96 - $94.35 |
| Q1 2016 | 150,683 | $12,618 | $80.09 | $72.30 - $88.00 |
| Q4 2015 | 150,683 | $12,486 | $86.71 | $78.13 - $94.18 |
| Q3 2015 | 150,626 | $12,692 | $81.19 | $74.57 - $88.00 |
| Q2 2015 | 150,626 | $12,098 | $68.50 | $61.65 - $80.34 |
| Q1 2015 | 151,340 | $9,593 | $61.65 | $56.04 - $67.90 |
| Q4 2014 | 151,540 | $8,796 | $59.42 | $54.07 - $63.69 |
| Q3 2014 | 151,654 | $9,207 | $66.40 | $60.68 - $75.50 |
| Q2 2014 | 152,642 | $11,118 | $71.81 | $67.09 - $77.75 |
| Q1 2014 | 151,766 | $11,843 | $78.13 | $73.04 - $84.00 |
| Q4 2013 | 151,977 | $12,234 | $73.58 | $67.32 - $81.00 |
| Q3 2013 | 152,680 | $10,750 | $72.80 | $68.50 - $77.50 |
| Q2 2013 | 155,045 | $11,168 | $76.01 | $70.25 - $80.50 |