| Symbol | Relationship | Date | Transaction | Cost | # Shares | Value($) | Total Shares | Form 4 |
| CEN | Secretary | Apr 24, 2015 | Buy | $15.38 | 58 | 892 | 223 | Apr 28, 2015, 03:33 PM |
| CEN | Secretary | Oct 15, 2014 | Buy | $17.45 | 55 | 960 | 165 | Oct 15, 2014, 02:11 PM |
| CEN | Secretary | Nov 22, 2013 | Buy | $17.97 | 110 | 1,977 | 110 | Nov 25, 2013, 01:47 PM |
| Symbol | Relationship | Date | Transaction | Value($) |
| CEN | Secretary | Apr 24, 2015 | Buy | 892 |
| CEN | Secretary | Oct 15, 2014 | Buy | 960 |
| CEN | Secretary | Nov 22, 2013 | Buy | 1,977 |