Ticker: NPK CUSIP: 637215104 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q3 2017 | 3,530 | $376 | $105.66 | $95.65 - $114.70 |
| Q2 2017 | 3,530 | $390 | $105.57 | $98.05 - $112.45 |
| Q1 2017 | 6,527 | $667 | $103.21 | $91.75 - $112.00 |
| Q4 2016 | 9,426 | $1,003 | $93.06 | $83.53 - $108.75 |
| Q3 2016 | 9,113 | $800 | $90.73 | $85.13 - $96.25 |
| Q2 2016 | 9,113 | $860 | $87.97 | $81.96 - $94.35 |
| Q1 2016 | 9,021 | $755 | $80.09 | $72.30 - $88.00 |
| Q4 2015 | 9,059 | $751 | $86.71 | $78.13 - $94.18 |
| Q3 2015 | 3,299 | $278 | $81.19 | $74.57 - $88.00 |
| Q2 2015 | 3,299 | $265 | $68.50 | $61.65 - $80.34 |
| Q1 2015 | 3,749 | $238 | $61.65 | $56.04 - $67.90 |
| Q4 2014 | 3,937 | $229 | $59.42 | $54.07 - $63.69 |
| Q3 2014 | 3,881 | $236 | $66.40 | $60.68 - $75.50 |
| Q2 2014 | 3,902 | $284 | $71.81 | $67.09 - $77.75 |
| Q1 2014 | 3,885 | $303 | $78.13 | $73.04 - $84.00 |
| Q4 2013 | 3,885 | $313 | $73.58 | $67.32 - $81.00 |
| Q3 2013 | 4,014 | $283 | $72.80 | $68.50 - $77.50 |
| Q2 2013 | 3,829 | $276 | $76.01 | $70.25 - $80.50 |