WESTERN DIGITAL CORP — Director's Dealing 2017

Nov 4, 2017

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: WESTERN DIGITAL CORP (WDC)
CIK: 0000106040
Period of Report: 2017-11-01

Reporting Person: LAMBERT MICHAEL D (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2017-11-01	Common Stock	M	1063	$32.99	Acquired	19361	Direct
2017-11-01	Common Stock	S	1063	$89.355	Disposed	18298	Direct
2017-11-01	Common Stock	M	98	$0.0	Acquired	18396	Direct
2017-11-02	Common Stock	A	2708	$0.0	Acquired	21104	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2017-11-01	Dividend Equivalent Rights	$	M	98.8855	Disposed		Common Stock (98.8855)	Direct
2017-11-01	Non-Qualified Stock Option (right to buy)	$32.99	M	1063	Disposed	2017-11-11	Common Stock (1063)	Direct

Footnotes

F1: This transaction is an acquisition of stock pursuant to the exercise of a stock option that would have soon expired.

F2: The 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 restricted stock units to which the dividend equivalents relate. A cash amount equal to $79.02 was also paid to the holder to settle a fractional dividend equivalent of 0.8855.

F3: 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.

F4: The option vested 25% on the first anniversary of the grant date and 6.25% at the end of each three-month period thereafter.