| Type | Filed | Filer | Subject | Shares Owned | Percent Owned | |
|---|---|---|---|---|---|---|
| SC 13G/A | 2012-02-10 | BlackRock Inc. | WESTERN DIGITAL CORP | 19,300,558 | 8.3% | EDGAR |
| SC 13G | 2012-02-10 | VANGUARD GROUP INC | WESTERN DIGITAL CORP | 13,635,802 | 5.8% | EDGAR |
| SC 13G/A | 2011-11-10 | FMR LLC | WESTERN DIGITAL CORP | 2,484,359 | 1.1% | EDGAR |
| SC 13G/A | 2011-02-14 | FMR LLC | WESTERN DIGITAL CORP | 18,048,434 | 7.9% | EDGAR |
| SC 13G/A | 2011-02-10 | VANGUARD GROUP INC | WESTERN DIGITAL CORP | 11,386,936 | 5.0% | EDGAR |
| SC 13G/A | 2011-02-09 | AXA FINANCIAL INC | WESTERN DIGITAL CORP | 396,012 | 0.2% | EDGAR |
| SC 13G/A | 2011-02-09 | BlackRock Inc. | WESTERN DIGITAL CORP | 20,878,652 | 9.1% | EDGAR |
| SC 13G/A | 2010-09-10 | BlackRock Inc. | WESTERN DIGITAL CORP | 23,106,468 | 10.1% | EDGAR |
| SC 13G/A | 2010-02-16 | FMR LLC | WESTERN DIGITAL CORP | 14,306,428 | 6.3% | EDGAR |
| SC 13G/A | 2010-02-12 | AXA FINANCIAL INC | WESTERN DIGITAL CORP | 13,871,826 | 6.2% | EDGAR |
| SC 13G | 2010-02-08 | VANGUARD GROUP INC | WESTERN DIGITAL CORP | 11,776,378 | 5.2% | EDGAR |
| SC 13G | 2010-01-29 | BlackRock Inc. | WESTERN DIGITAL CORP | 19,128,834 | 8.5% | EDGAR |
| SC 13G/A | 2009-08-10 | AXA FINANCIAL INC | WESTERN DIGITAL CORP | 18,406,060 | 8.3% | EDGAR |
| SC 13G/A | 2009-06-10 | BlackRock Inc. | WESTERN DIGITAL CORP | 10,772,324 | 4.8% | EDGAR |
| SC 13G/A | 2009-02-17 | FMR LLC | WESTERN DIGITAL CORP | 12,063,753 | 5.4% | EDGAR |
| SC 13G/A | 2009-02-13 | AXA FINANCIAL INC | WESTERN DIGITAL CORP | 29,715,724 | 13.4% | EDGAR |
| SC 13G | 2009-02-10 | BlackRock Inc. | WESTERN DIGITAL CORP | 14,451,558 | 6.5% | EDGAR |
| SC 13G | 2009-02-05 | BARCLAYS GLOBAL INVESTORS NA /CA/ | WESTERN DIGITAL CORP | 5,797,794 | 2.6% | EDGAR |
| SC 13G/A | 2008-11-10 | FMR LLC | WESTERN DIGITAL CORP | 13,794,567 | 6.2% | EDGAR |
| SC 13G | 2008-09-10 | AXA FINANCIAL INC | WESTERN DIGITAL CORP | 25,792,658 | 11.6% | EDGAR |