Ticker: NPK CUSIP: 637215104 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q2 2017 | 4,930 | $545 | $105.57 | $98.05 - $112.45 |
| Q1 2017 | 2,930 | $299 | $103.21 | $91.75 - $112.00 |
| Q4 2016 | 2,500 | $266 | $93.06 | $83.53 - $108.75 |
| Q3 2016 | 3,330 | $292 | $90.73 | $85.13 - $96.25 |
| Q2 2016 | 3,330 | $314 | $87.97 | $81.96 - $94.35 |
| Q1 2016 | 3,140 | $263 | $80.09 | $72.30 - $88.00 |
| Q4 2015 | 3,140 | $260 | $86.71 | $78.13 - $94.18 |
| Q3 2015 | 2,580 | $217 | $81.19 | $74.57 - $88.00 |