| Symbol | Relationship | Date | Transaction | Cost | # Shares | Value($) | Total Shares | Form 4 |
| CEN | Director | Apr 24, 2015 | Buy | $15.38 | 3,334 | 51,277 | 13,334 | Apr 28, 2015, 03:29 PM |
| CEN | Director | Nov 22, 2013 | Buy | $18.00 | 5,000 | 90,000 | 10,000 | Nov 25, 2013, 04:17 PM |
| CEN | Director | Nov 18, 2013 | Buy | $19.00 | 5,000 | 95,000 | 5,000 | Nov 19, 2013, 01:28 PM |
| Symbol | Relationship | Date | Transaction | Value($) |
| CEN | Director | Apr 24, 2015 | Buy | 51,277 |
| CEN | Director | Nov 22, 2013 | Buy | 90,000 |
| CEN | Director | Nov 18, 2013 | Buy | 95,000 |