WESTERN DIGITAL CORP — Director's Dealing 2012

Dec 13, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: WESTERN DIGITAL CORP (WDC)
CIK: 0000106040
Period of Report: 2012-12-10

Reporting Person: KIMSEY WILLIAM L (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-12-10	Common Stock	M	9185	$19.09	Acquired	51382	Direct
2012-12-10	Common Stock	S	9185	$38.6841	Disposed	42197	Direct
2012-12-12	Common Stock	M	7364	$27.64	Acquired	49561	Direct
2012-12-12	Common Stock	M	8451	$15.34	Acquired	58012	Direct
2012-12-12	Common Stock	S	15815	$38	Disposed	42197	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-12-12	Non-Qualified Stock Option (right to buy)	$15.34	M	8451	Disposed	2015-11-06	Common Stock (8451)	Direct
2012-12-10	Non-Qualified Stock Option (right to buy)	$19.09	M	9185	Disposed	2017-02-06	Common Stock (9185)	Direct
2012-12-12	Non-Qualified Stock Option (right to buy)	$27.64	M	7364	Disposed	2014-11-06	Common Stock (7364)	Direct

Footnotes

F1: Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $38.67 to a high of $38.73. 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.

F2: The option vested 25% on the first anniversary of the grant date and 6.25% at the end of each three-month period thereafter.