| Filed On | Filing |
|---|---|
| 11 Mar 2013 | SC 13G/A |
| 13 Feb 2013 | SC 13G/A |
| 13 Feb 2013 | SC 13G/A |
| 12 Feb 2013 | NXY AS OF 12/31/12 |
| 10 May 2012 | NEXEN |
| 08 Feb 2012 | 12/31/2011 |
| 13 Feb 2008 | SC 13G/A |
| 12 Feb 2007 | SC 13G/A |
| 10 Feb 2006 | SC 13G/A |
| 14 Feb 2005 | SC 13G/A |
| 13 Feb 2004 | SC 13G/A |
| 13 Feb 1998 | SCHEDULE 13G |
| 09 Feb 1998 | SCHEDULE 13G -2-14-98 - CANADIAN OCCIDENTAL PETROLEUM LTD |
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