WESTERN DIGITAL CORP — Director's Dealing 2017

Sep 21, 2017

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: WESTERN DIGITAL CORP (WDC)
CIK: 0000106040
Period of Report: 2017-09-18

Reporting Person: CORDANO MICHAEL D (President and COO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2017-09-18	Common Stock	M	1401	$68.53	Acquired	75385	Direct
2017-09-18	Common Stock	M	4959	$68.49	Acquired	80344	Direct
2017-09-18	Common Stock	S	5960	$88.4746	Disposed	74384	Direct
2017-09-18	Common Stock	S	3444	$89.112	Disposed	70940	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2017-09-18	Employee Stock Option (right to buy)	$68.49	M	4959	Disposed	2020-08-14	Common Stock (4959)	Direct
2017-09-18	Employee Stock Option (right to buy)	$68.53	M	1401	Disposed	2022-11-03	Common Stock (1401)	Direct

Footnotes

F1: These transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on August 8, 2016.

F2: Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $87.90 to a high of $88.89. 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.

F3: Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $88.92 to a high of $89.27. 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.

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.

F5: The option vested 25% one year from the grant date of 11/3/2015, and an additional 6.25% vested at the end of each three-month period through 8/3/2017. The remaining shares subject to the option will vest at 6.25% at the end of each three-month period until fully vested on 11/3/2019.