| Filed On | Filing |
|---|---|
| 14 Feb 2007 | SCHEDULE 13G |
| 06 Jan 2006 | SC 13G |
| 05 Jan 2006 | BENEFICIAL OWNERSHIP OF 5% OR MORE |
| 10 Nov 2004 | ROTH START/ 2004 FILINGS/NOV-13G-SIMTEK |
| 10 Jul 2002 | INITIAL FILINGS |
| 07 Apr 2000 | SC 13G |
| 07 Apr 2000 | SC 13G |
| 08 Mar 2000 | SC 13G |
| 07 Mar 2000 | SC 13G |
| 10 Jun 1999 | SC 13G |
| 10 Jun 1999 | SC 13G |
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