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ESSEX INVESTMENT MANAGEMENT CO LLC
> WDC
| Date | Name | Ticker | Shares | Change | Value | Change | Price |
| 06/30/2023 | WESTERN DIGITAL CORP | WDC | 31,736 | 31,736 | 1,203,746,000 | 1,203,746,000 | $37,929.98 |
| 09/30/2012 | WESTERN DIGITAL CORP | WDC | 0 | -3,636 | 0 | -110,825 | |
| 06/30/2012 | WESTERN DIGITAL CORP | WDC | 3,636 | 1,520 | 110,825 | 23,244 | $30.48 |
| 03/31/2012 | WESTERN DIGITAL CORP | WDC | 2,116 | 1,344 | 87,581 | 63,688 | $41.39 |
| 12/31/2011 | WESTERN DIGITAL CORP | WDC | 772 | 772 | 23,893 | 23,893 | $30.95 |
| 06/30/2011 | WESTERN DIGITAL CORP | WDC | 0 | -22,237 | 0 | -829,218 | |
| 03/31/2011 | WESTERN DIGITAL CORP | WDC | 22,237 | -2,577 | 829,218 | -11,977 | $37.29 |
| 12/31/2010 | WESTERN DIGITAL CORP | WDC | 24,814 | -599 | 841,195 | 119,720 | $33.90 |
| 09/30/2010 | WESTERN DIGITAL CORP | WDC | 25,413 | -4,055 | 721,475 | -167,280 | $28.39 |
| 06/30/2010 | WESTERN DIGITAL CORP | WDC | 29,468 | -43,810 | 888,755 | -1,968,354 | $30.16 |
| 03/31/2010 | WESTERN DIGITAL CORP | WDC | 73,278 | -179 | 2,857,109 | -386,017 | $38.99 |
| 12/31/2009 | WESTERN DIGITAL CORP | WDC | 73,457 | -4,789 | 3,243,127 | 384,800 | $44.15 |
| 09/30/2009 | WESTERN DIGITAL CORP | WDC | 78,246 | 2,163 | 2,858,326 | 842,127 | $36.53 |
| 06/30/2009 | WESTERN DIGITAL CORP | WDC | 76,083 | 6,210 | 2,016,200 | 664,856 | $26.50 |
| 03/31/2009 | WESTERN DIGITAL CORP | WDC | 69,873 | -2,531 | 1,351,344 | 522,318 | $19.34 |
| 12/31/2008 | WESTERN DIGITAL CORP | WDC | 72,404 | -11,628 | 829,026 | -962,536 | $11.45 |
| 09/30/2008 | WESTERN DIGITAL CORP | WDC | 84,032 | 8,404 | 1,791,562 | -819,873 | $21.32 |
| 06/30/2008 | WESTERN DIGITAL CORP | WDC | 75,628 | -3,990 | 2,611,435 | 458,564 | $34.53 |
| 03/31/2008 | WESTERN DIGITAL CORP | WDC | 79,618 | -105,846 | 2,152,871 | -3,449,996 | $27.04 |
| 12/31/2007 | WESTERN DIGITAL CORP | WDC | 185,464 | -6,631 | 5,602,867 | 739,022 | $30.21 |
| 09/30/2007 | WESTERN DIGITAL CORP | WDC | 192,095 | -2,603 | 4,863,845 | 1,096,439 | $25.32 |
| 06/30/2007 | WESTERN DIGITAL CORP | WDC | 194,698 | -85,425 | 3,767,406 | -941,462 | $19.35 |
| 03/31/2007 | WESTERN DIGITAL CORP | WDC | 280,123 | 280,123 | 4,708,868 | 4,708,868 | $16.81 |
| 12/31/2006 | WESTERN DIGITAL CORP | WDC | 290,714 | -29,912 | 5,948,008 | 144,677 | $20.46 |
| 09/30/2006 | WESTERN DIGITAL CORP | WDC | 320,626 | -11,923 | 5,803,331 | -784,465 | $18.10 |
| 06/30/2006 | WESTERN DIGITAL CORP | WDC | 332,549 | -196,567 | 6,587,796 | -3,259,053 | $19.81 |
| 12/31/2005 | WESTERN DIGITAL CORP | WDC | 529,116 | -494,832 | 9,846,849 | -3,392,799 | $18.61 |
| 09/30/2005 | WESTERN DIGITAL CORP | WDC | 1,023,948 | -1,827,436 | 13,239,648 | 13,239,647 | $12.93 |
| 06/30/2005 | WESTERN DIGITAL CORP | WDC | 2,851,384 | 2,238,524 | 1 | -7,758,806 | $0.00 |
| 03/31/2005 | WESTERN DIGITAL CORP | WDC | 612,860 | 612,860 | 7,758,808 | 7,758,808 | $12.66 |
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