SEC Form 4 · accession 0001266824-18-000030

WESTERN DIGITAL CORP · WDC

Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗

Reporting owner

Stephen D Milligan

Officer — Chief Executive Officer · Director

Period of report

Jan 29, 2018

Accepted (ET)

Jan 31, 2018 · 6:33 pm EST

Rule 10b5-1 plan

unknown — predates the checkbox

Issuer CIK

0000106040

Table I — non-derivative securities

Security	Date	Code	Shares	Price	A/D	Owned after	D/I	Nature of ownership
Common Stock^F2	Jan 29, 2018	M	82,554	$44.78	A	231,126	D
Common Stock^F3	Jan 29, 2018	S	56,110	$87.6571	D	175,016	D
Common Stock^F4	Jan 29, 2018	S	26,433	$88.6935	D	148,583	D
Common Stock^F5	Jan 29, 2018	S	8,212	$89.4183	D	140,371	D
Common Stock	holding	—	—		—	22,500	I	By Family Trust

Table II — derivative securities

Security	Conv. / exercise price	Date	Code	Shares	A/D	Exercisable	Expires	Underlying	Underlying shares	Owned after	D/I
Employee Stock Option (right to buy)^F6	$44.78	Jan 29, 2018	M	82,554	D	Aug 3, 2017	Aug 3, 2023	Common Stock	82,554	181,616	D

Explanation of responses

F1These transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on October 30, 2017.
F2Includes 63 shares acquired under the Issuer's Employee Stock Purchase Plan on November 30, 2017.
F3Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $87.22 to a high of $88.21. 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.
F4Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $88.22 to a high of $89.21. 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.
F5Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $89.22 to a high of $89.76. 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.
F6The option vested 25% one year from the grant date of 8/3/2016, and an additional 6.25% vested at the end of each three-month period through 11/3/2017. The remaining shares subject to the option will vest at 6.25% at the end of each three-month period until fully vested on 8/3/2020.