| Filed On | Filing |
|---|---|
| 14 Feb 2019 | SCHEDULE 13G |
| 14 Feb 2019 | SC 13G |
| 14 Feb 2018 | SCHEDULE 13G |
| 14 Feb 2017 | SCHEDULE 13G |
| 12 Feb 2016 | SCHEDULE 13G |
| 13 Feb 2015 | SCHEDULE 13G |
| 14 Feb 2014 | DISCLOSURE DOCUMENT |
| 28 Jan 2014 | SC 13G |
| 05 Jul 2013 | SC 13G |
| 12 Feb 2013 | SC 13G |
| 11 Feb 2013 | SCHEDULE 13G |
| 10 Feb 2012 | CLH AS OF 12/31/2011 |
| 16 Feb 2010 | DOC ONE |
| 12 Feb 2010 | SC 13G |
| 29 Jan 2010 | SC 13G |
| 14 Feb 2008 | SC 13G |
| 14 Feb 2008 | SC 13G |
| 15 Feb 2007 | 13G 2006 FRIESS ASSOCIATES LLC |
| 11 Oct 2006 | 09/30/06 13G |
| 10 Jul 2006 | DOC ONE |
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