Ticker: NPK CUSIP: 637215104 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 8,068 | $861 | $104.80 | $91.28 - $120.49 |
| Q3 2015 | 16,572 | $1,396 | $81.19 | $74.57 - $88.00 |
| Q2 2015 | 17,499 | $1,405 | $68.50 | $61.65 - $80.34 |
| Q1 2015 | 18,672 | $1,183 | $61.65 | $56.04 - $67.90 |
| Q4 2014 | 19,293 | $1,119 | $59.42 | $54.07 - $63.69 |
| Q3 2014 | 12,230 | $743 | $66.40 | $60.68 - $75.50 |
| Q2 2014 | 13,773 | $1,003 | $71.81 | $67.09 - $77.75 |
| Q1 2014 | 14,796 | $1,155 | $78.13 | $73.04 - $84.00 |
| Q4 2013 | 12,215 | $984 | $73.58 | $67.32 - $81.00 |
| Q3 2013 | 3,935 | $277 | $72.80 | $68.50 - $77.50 |
| Q2 2013 | 3,032 | $218 | $76.01 | $70.25 - $80.50 |