| Type | Filed | Filer | Subject | Shares Owned | Percent Owned | |
|---|---|---|---|---|---|---|
| SC 13G/A | 2011-03-09 | BlackRock Inc. | CENOVUS ENERGY INC. | 36,515,033 | 4.9% | EDGAR |
| SC 13G/A | 2011-02-03 | BlackRock Inc. | CENOVUS ENERGY INC. | 40,269,596 | 5.4% | EDGAR |
| SC 13G | 2010-01-29 | BlackRock Inc. | CENOVUS ENERGY INC. | 38,934,986 | 5.2% | EDGAR |