| Year | Qtr | # Shares | Change |
|---|---|---|---|
| 2015 | Q3 | 200,000 | |
| 2015 | Q2 | 200,000 | |
| 2015 | Q1 | 200,000 | |
| 2013 | Q4 | 0 | Liquidated |
| 2013 | Q3 | 1,000,000 | |
| 2013 | Q1 | 0 | Liquidated |
| 2012 | Q4 | 3,900,000 | +2,900,000 |
| 2012 | Q3 | 1,000,000 | |
| 2012 | Q1 | 0 | Liquidated |
| 2011 | Q4 | 500,000 | |
| 2011 | Q3 | 500,000 | -200,000 |
| 2011 | Q2 | 700,000 |