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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
106040	Western Digital Corp	WDC	Computer Storage Devices (3572)	330956711

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1398362	M Timothy Leyden	C/O Western Digital Corporation 3355 Michelson Drive, Suite 100 Irvine CA 92612	Cfo	No	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Acquisiton	2014-02-28	36,596	$19.89	252,565	No	4	M	Direct
Common Stock	Disposition	2014-02-28	16,596	$87.29	235,969	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	M	Direct
No	4	S	Direct

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Employee Stock Option (right to buy)	Disposition	2014-02-28	36,596	$0.00	36,596	$19.89

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
0	2008-06-12	2014-06-12	No	4	M	Direct

Footnotes

This transaction relates to a stock option with an approaching expiration date and was originally granted in June 2007 under the Issuer's 2004 Performance Incentive Plan.
Includes 322 shares acquired under the Issuer's Employee Stock Purchase Plan on November 30, 2013.
Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $87.24 to a high of $87.44. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.
The option vested 25% on the first anniversary of the grant date and 6.25% at the end of each three-month period thereafter.