| Filed On | Filing |
|---|---|
| 24 Jan 2013 | SC 13G |
| 09 Feb 2012 | SC 13G |
| 09 Feb 2012 | SC 13G |
| 14 Feb 2011 | SC 13G |
| 10 Feb 2011 | LUFKIN INDUSTRIES, INC. - 12/31/2010 |
| 16 Feb 2010 | DOC ONE |
| 29 Jan 2010 | SC 13G |
| 05 Feb 2009 | SC 13G |
| 12 Feb 2008 | SCHEDULE 13G |
| 05 Feb 2008 | SC 13G |
| 30 Jan 2008 | SC 13G |
| 23 Jan 2007 | SC 13G |
| 09 Feb 2006 | SC 13G |
| 26 Jan 2006 | SC 13G |
| 14 Feb 2005 | SC 13G |
| 14 Feb 2001 | SCHEDULE 13G - 02-14-01 - LUFKIN INDUSTRIES INCORPORATED |
| 02 Feb 2001 | 2000 SCHEDULE 13G - LUFKIN INDS INC |
| 03 Feb 2000 | 1999 SCHEDULE 13G - LUFKIN INDS INC |
| 26 Jan 2000 | LUFKIN INDUSTRIES INC |
| 12 Feb 1997 | SC 13G |
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