WESTERN DIGITAL CORP

Ticker: WDC CUSIP: 958102105 Class: EQTY

MARTINGALE ASSET MANAGEMENT L P's Holding History (CIK: 0000936944)

Note: Option positions (PUT/CALL) are excluded.

Q3 2014

Shares 6,723 Value ($000) $655 Avg Close $62.41 Range $58.43 - $64.97

Q2 2014

Shares 27,610 Value ($000) $2,549 Avg Close $55.43 Range $50.48 - $59.36

Q1 2014

Shares 64,643 Value ($000) $5,936 Avg Close $53.80 Range $50.34 - $57.78

Q4 2013

Shares 58,627 Value ($000) $4,919 Avg Close $45.88 Range $38.72 - $52.56

Q3 2013

Shares 120,660 Value ($000) $7,650 Avg Close $40.38 Range $36.69 - $43.65

Q2 2013

Shares 129,557 Value ($000) $8,045 Avg Close $35.69 Range $30.03 - $40.17

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2014	6,723	$655	$62.41	$58.43 - $64.97
Q2 2014	27,610	$2,549	$55.43	$50.48 - $59.36
Q1 2014	64,643	$5,936	$53.80	$50.34 - $57.78
Q4 2013	58,627	$4,919	$45.88	$38.72 - $52.56
Q3 2013	120,660	$7,650	$40.38	$36.69 - $43.65
Q2 2013	129,557	$8,045	$35.69	$30.03 - $40.17