| Type | Filed | Filer | Subject | Shares Owned | Percent Owned | |
|---|---|---|---|---|---|---|
| SC 13G | 2014-02-11 | VANGUARD GROUP INC | MENTOR GRAPHICS CORP | 6,930,010 | 6.0% | EDGAR |
| SC 13G/A | 2014-01-30 | BlackRock Inc. | MENTOR GRAPHICS CORP | 8,410,473 | 7.3% | EDGAR |
| SC 13G/A | 2013-10-11 | STANDARD LIFE INVESTMENTS (USA) LTD | MENTOR GRAPHICS CORP | 0 | 0.0% | EDGAR |
| SC 13G/A | 2013-02-14 | FMR LLC | MENTOR GRAPHICS CORP | 9,368,694 | 8.3% | EDGAR |
| SC 13G | 2013-02-13 | MUNDER CAPITAL MANAGEMENT | MENTOR GRAPHICS CORP | 5,861,038 | 5.2% | EDGAR |
| SC 13G/A | 2013-02-05 | BlackRock Inc. | MENTOR GRAPHICS CORP | 7,800,456 | 6.9% | EDGAR |
| SC 13G | 2012-07-10 | FMR LLC | MENTOR GRAPHICS CORP | 10,995,440 | 10.0% | EDGAR |
| SC 13D/A | 2012-05-17 | ICAHN CARL C | MENTOR GRAPHICS CORP | - | - | EDGAR |
| SC 13D/A | 2012-05-01 | ICAHN CARL C | MENTOR GRAPHICS CORP | - | - | EDGAR |
| SC 13D/A | 2012-03-01 | CASABLANCA CAPITAL LLC | MENTOR GRAPHICS CORP | 429,745 | - | EDGAR |
| SC 13G/A | 2012-02-13 | BlackRock Inc. | MENTOR GRAPHICS CORP | 7,187,684 | 6.6% | EDGAR |
| SC 13D/A | 2011-08-16 | CASABLANCA CAPITAL LLC | MENTOR GRAPHICS CORP | 581,102 | - | EDGAR |
| SC 13D/A | 2011-04-26 | CASABLANCA CAPITAL LLC | MENTOR GRAPHICS CORP | 573,683 | - | EDGAR |
| SC 13D/A | 2011-04-01 | CASABLANCA CAPITAL LLC | MENTOR GRAPHICS CORP | 573,683 | - | EDGAR |
| SC 13D/A | 2011-03-31 | ICAHN CARL C | MENTOR GRAPHICS CORP | - | - | EDGAR |
| SC 13D/A | 2011-03-30 | ICAHN CARL C | MENTOR GRAPHICS CORP | - | - | EDGAR |
| SC 13D/A | 2011-03-29 | ICAHN CARL C | MENTOR GRAPHICS CORP | - | - | EDGAR |
| SC 13D/A | 2011-03-14 | CASABLANCA CAPITAL LLC | MENTOR GRAPHICS CORP | 573,683 | - | EDGAR |
| SC 13D/A | 2011-03-10 | CASABLANCA CAPITAL LLC | MENTOR GRAPHICS CORP | 573,683 | - | EDGAR |
| SC 13D/A | 2011-02-22 | ICAHN CARL C | MENTOR GRAPHICS CORP | - | - | EDGAR |