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Filing Details

Accession Number:: 0001266824-13-000113
Form Type:: 4
Zero Holdings:: No
Publication Time:: 2013-08-16 20:42:59
Reporting Period:: 2013-08-14

Filing Date:: 2013-08-16
Accepted Time:: 2013-08-16 20:42:59
SEC Url:: Form 4 Filing

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
1277246	D Stephen Milligan	C/O Western Digital Corporation 3355 Michelson Drive, Suite 100 Irvine CA 92612	President & Ceo	Yes	Yes	No	No

Reported Non-Derivative Transactions

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Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership
Common Stock	Acquisiton	2013-08-14	30,697	$0.00	116,658	No	4	A	Direct
Common Stock	Acquisiton	2013-08-15	705	$0.00	117,363	No	4	M	Direct
Common Stock	Disposition	2013-08-15	23,776	$66.02	93,587	No	4	F	Direct
Common Stock	Disposition	2013-08-15	2,534	$67.67	91,053	No	4	S	Direct
Common Stock	Acquisiton	2013-08-15	44,863	$0.00	135,916	No	4	A	Direct
Common Stock	Disposition	2013-08-16	5,449	$65.53	130,467	No	4	S	Direct

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

Reported Derivative Transactions

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Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Dividend Equivalent Rights	Disposition	2013-08-15	720	$0.00	720	$0.00
Common Stock	Employee Stock Option (right to buy)	Acquisiton	2013-08-14	90,621	$0.00	90,621	$68.49

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
4,191			No	4	M	Direct
90,621	2014-08-14	2020-08-14	No	4	A	Direct

Footnotes

Represents the grant of restricted stock units to the reporting person. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.
An amount equal to 14.413 dividend equivalents were canceled without payment in connection with the determination of the achievement level of the performance-based restricted stock units to which the dividend equivalents relate. The remaining dividend equivalents were converted into, and paid in the form of, shares of the issuer's common stock on a one-for-one basis in connection with the vesting of the performance-based restricted stock units to which the dividend equivalents relate. A cash amount equal to $19.45 was also paid to the holder to settle a fractional dividend equivalent of 0.2946.
Payment of tax obligation by withholding securities incident to the vesting of securities in accordance with Rule 16b-3(e).
The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 20, 2013.
Represents shares issued as payment in respect of the vesting of a performance-based stock unit award.
Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $65.20 to a high of $65.89. 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 vests 25% on the first anniversary of the grant date and 6.25% at the end of each three-month period thereafter.