SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL OMB Number: 3235-0104 Estimated average burden hours per response: 0.5

1. Name and Address of Reporting Person* DeMaria Jacqueline (Last) (First) (Middle) C/O WESTERN DIGITAL CORPORATION 3355 MICHELSON DRIVE, SUITE 100 (Street) IRVINE CA 92612 (City) (State) (Zip)	2. Date of Event Requiring Statement (Month/Day/Year) 11/03/2015	3. Issuer Name and Ticker or Trading Symbol WESTERN DIGITAL CORP [ WDC ]
		4. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director 10% Owner X Officer (give title below) Other (specify below) EVP & Chief Human Res Officer	5. If Amendment, Date of Original Filed (Month/Day/Year)
			6. Individual or Joint/Group Filing (Check Applicable Line) X Form filed by One Reporting Person Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock	22,564(1)	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Dividend Equivalent Rights	(2)	(2)	Common Stock	327.1658	(2)	D
Employee Stock Option (right to buy)	09/14/2012(3)	09/14/2018	Common Stock	2,793	29.6	D
Employee Stock Option (right to buy)	05/16/2013(4)	05/16/2019	Common Stock	7,041	38.63	D
Employee Stock Option (right to buy)	09/06/2013(5)	09/06/2019	Common Stock	11,576	43.11	D
Employee Stock Option (right to buy)	08/14/2014(6)	08/14/2020	Common Stock	14,184	43.11	D
Employee Stock Option (right to buy)	08/04/2016(7)	08/04/2022	Common Stock	15,958	84.39	D
Employee Stock Option (right to buy)	09/11/2015(8)	09/11/2021	Common Stock	20,865	100.06	D

Explanation of Responses:

1. Includes 15,409 unvested awards of restricted stock units. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.

2. The dividend equivalent rights accrued on previously awarded restricted stock units (RSUs) which vest proportionately with the RSUs to which they relate. Each dividend equivalent right represents a contingent right to receive one share of the Issuer's common stock or the cash value thereof.

3. The option vested 25% one year from the grant date of 9/14/2011, and an additional 6.25% vested at the end of each three-month period through 9/14/2015.

4. The option vested 25% one year from the grant date of 5/16/2012, and an additional 6.25% vested at the end of each three-month period through 8/16/2015. The remaining shares subject to the option will vest at 6.25% at the end of each three-month period until fully vested on 5/16/2016.

5. The option vested 25% one year from the grant date of 9/6/2012, and an additional 6.25% vested at the end of each three-month period through 9/6/2015. The remaining shares subject to the option will vest at 6.25% at the end of each three-month period until fully vested on 9/6/2016.

6. The option vested 25% one year from the grant date of 8/14/2013, and an additional 6.25% vested at the end of each three-month period through 8/14/2015. The remaining shares subject to the option will vest at 6.25% at the end of each three-month period until fully vested on 8/14/2017.

7. The option vests 25% on the first anniversary of the grant date of 8/4/15 and 6.25% at the end of each three-month period thereafter.

8. The option vested 25% one year from the grant date of 9/11/14. The remaining shares subject to the option will vest at 6.25% at the end of each three-month period until fully vested on 9/11/18.

	By: /s/ Sandra Garcia Attorney-in-Fact For: Jacqueline DeMaria	11/05/2015
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.