# EDGAR Filing Document

**Accession Number:** 0000106040
**File Stem:** 0001628280-25-053844
**Filing Date:** 2025-11
**Character Count:** 33175
**Document Hash:** 9ca830b755fdf084d8b45872c6c519a2
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001628280-25-053844.hdr.sgml**: 20251124

**ACCESSION NUMBER**: 0001628280-25-053844

**CONFORMED SUBMISSION TYPE**: S-8

**PUBLIC DOCUMENT COUNT**: 14

**FILED AS OF DATE**: 20251124

**DATE AS OF CHANGE**: 20251124

**EFFECTIVENESS DATE**: 20251124

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** WESTERN DIGITAL CORP
- **CENTRAL INDEX KEY:** 0000106040
- **STANDARD INDUSTRIAL CLASSIFICATION:** COMPUTER STORAGE DEVICES [3572]
- **ORGANIZATION NAME:** 06 Technology
- **EIN:** 330956711
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 0703

**FILING VALUES:**
- **FORM TYPE:** S-8
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-291755
- **FILM NUMBER:** 251513809

**BUSINESS ADDRESS:**
- **STREET 1:** 5601 GREAT OAKS PARKWAY
- **CITY:** SAN JOSE
- **STATE:** CA
- **ZIP:** 95119
- **BUSINESS PHONE:** 9496727000

**MAIL ADDRESS:**
- **STREET 1:** 3355 MICHELSON DRIVE SUITE 100
- **CITY:** IRVINE
- **STATE:** CA
- **ZIP:** 92612

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** GENERAL DIGITAL CORP
- **DATE OF NAME CHANGE:** 19730125

**As filed with the Securities and Exchange Commission on November 24, 2025**

**Registration No. 333-&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**

**UNITED STATES**

**SECURITIES AND EXCHANGE COMMISSION**

**WASHINGTON, DC 20549** 

______________________________________________

**FORM S-8**

**REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933**

______________________________________________

**WESTERN DIGITAL CORPORATION**

(Exact name of registrant as specified in its charter)

---

| | |
|:---|:---|
| **Delaware**<br> (State or Other Jurisdiction of Incorporation or Organization) | **33-0956711**<br> (I.R.S. Employer Identification No.) |

---

**Western Digital Corporation**

**5601 Great Oaks Parkway,** 

**San Jose, CA 95119**

**(408) 717-6000**

(Address of Principal Executive Offices, Zip Code)

**Western Digital Corporation Amended and Restated 2005 Employee Stock Purchase Plan**

**<br>(Full title of the plan)**

**Cynthia Lock Tregillis**

**Executive Vice President, Chief Legal Officer and Secretary**

**Western Digital Corporation**

**5601 Great Oaks Parkway**

**San Jose, California 95119**

**(408) 717-6000**

**(Name, address, including zip code, and telephone number, including area code, of agent for service)**

***Copies to*:**

**Sean Feller, Esq.**

**Gibson, Dunn & Crutcher LLP**

**2000 Avenue of the Stars Suite 1200N**

**Los Angeles, CA 90067-4700**

**(310) 552-8500**

------

______________________________________________

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company. See the definitions of "large accelerated filer," "accelerated filer", "smaller reporting company" and "emerging growth company" in Rule 12b-2 of the Exchange Act.

---

| | | | |
|:---|:---|:---|:---|
| Large accelerated filer | ☒ | Accelerated filer | ☐ |
| Non-accelerated filer | ☐ | Smaller reporting company | ☐ |
| | | Emerging growth company | ☐ |
| If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act. ☐ | If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act. ☐ | If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act. ☐ | If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act. ☐ |

---

&nbsp;&nbsp;&nbsp;&nbsp;2

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**EXPLANATORY NOTE**

On November 20, 2025, the stockholders of Western Digital Corporation (the "Company" or the "Registrant") approved an amendment and restatement of the Western Digital Corporation Amended and Restated 2005 Employee Stock Purchase Plan (the "ESPP") that increased by an aggregate of 8,000,000 the number of shares of the Company's common stock, par value $0.01 per share ("Common Stock"), available for issuance under the ESPP (the "New Shares"). The purpose of this Registration Statement is to register the New Shares under the ESPP.

**PART I** 

**INFORMATION REQUIRED IN THE SECTION 10(a) PROSPECTUS** 

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| | |
|:---|:---|
| <br>**Item 1.** | <br>**Plan Information**\* |

---

Not required to be filed with this registration statement.

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| | |
|:---|:---|
| **Item 2.** | **Registrant Information and Employee Plan Annual Information**\* |
| Not required to be filed with this registration statement. | Not required to be filed with this registration statement. |

---

**\*&nbsp;&nbsp;&nbsp;&nbsp;Documents containing the information specified in Part I of Form S-8 have been and/or will be sent or given to employees as specified by Rule 428(b)(1) of the Securities Act. In accordance with the instructions of Part I of Form S-8, such documents will not be filed with the Securities and Exchange Commission (the "Commission") either as part of this Registration Statement or as prospectuses or prospectus supplements pursuant to Rule 424 under the Securities Act. These documents and the documents incorporated by reference pursuant to Item 3 of Part II of this Registration Statement, taken together, constitute the prospectus as required by Section 10(a) of the Securities Act.** 

**PART II** 

**INFORMATION REQUIRED IN THE REGISTRATION STATEMENT** 

**Item 3.&nbsp;&nbsp;&nbsp;&nbsp;Incorporation of Documents by Reference.**

The following documents filed by the Registrant with the Commission are incorporated by reference herein and shall be deemed to be a part hereof:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• The Registrant's Annual Report on <u>[Form 10-K](https://www.sec.gov/ix?doc=/Archives/edgar/data/0000106040/000010604025000038/wdc-20250627.htm)</u> for the fiscal year ended June 27, 2025, filed with the Commission on August 14, 2025;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• The Registrant's Quarterly Report on Form 10-Q for the fiscal quarter ended October 3, 2025, filed with the Commission on <u>[October 31, 2025](https://www.sec.gov/ix?doc=/Archives/edgar/data/0000106040/000162828025047613/wdc-20251003.htm)</u>;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• The Registrant's Current Reports on Form 8-K filed with the Commission on <u>[November 3, 2025](https://www.sec.gov/ix?doc=/Archives/edgar/data/0000106040/000119312525262773/d43436d8k.htm)</u> and <u>[November](https://www.sec.gov/ix?doc=/Archives/edgar/data/0000106040/000162828025053809/wdc-20251120.htm)[24](https://www.sec.gov/ix?doc=/Archives/edgar/data/0000106040/000162828025053809/wdc-20251120.htm)[, 2025](https://www.sec.gov/ix?doc=/Archives/edgar/data/0000106040/000162828025053809/wdc-20251120.htm)</u>; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• The description of the Registrant's Common Stock set forth in <u>[Exhibit 4.1](https://www.sec.gov/Archives/edgar/data/106040/000010604024000031/wdc-2024q4ex41.htm)</u> to the Registrant's Annual Report on Form 10-K for the fiscal year ended June 28, 2024, filed on August 20, 2024, including any amendment or report filed for the purpose of updating such description.

In addition, all documents subsequently filed by the Registrant pursuant to Sections 13(a), 13(c), 14, and 15(d) of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), prior to the filing of a post-effective amendment which indicates that all securities being offered have been sold or which deregisters all

------

securities then remaining unsold, shall be deemed to be incorporated herein by reference and to be a part hereof from the dates of filing of such documents; provided, however, that documents or information deemed to have been furnished and not filed in accordance with Commission rules shall not be deemed incorporated by reference into this Registration Statement. Any statement contained in a document incorporated, or deemed to be incorporated, by reference herein shall be deemed to be modified or superseded for purposes of this Registration Statement to the extent that a statement contained herein or in any other subsequently filed document that also is, or is deemed to be, incorporated by reference herein modifies or supersedes such statement. Any such statement so modified or superseded shall not be deemed, except as so modified or superseded, to constitute a part of this Registration Statement.

**Item 4.&nbsp;&nbsp;&nbsp;&nbsp;Description of Securities.** 

Not applicable.

**Item 5.&nbsp;&nbsp;&nbsp;&nbsp;Interests of Named Experts and Counsel.** 

The validity of the issuance of Common Stock registered hereby is passed on for the Registrant by Cynthia L. Tregillis. As of the date hereof, Ms. Tregillis is the Executive Vice President, Chief Legal Officer and Secretary of the Company, is compensated by the Company as an employee and is a stockholder of the Company. As of November 19, 2025, Ms. Tregillis beneficially owned 28,725 shares of Common Stock, 121,141 restricted stock units that are payable in an equivalent number of shares of Common Stock, and 16,570 performance stock units (at the target level of performance, or, if applicable, as credited) that are payable in an equivalent number of shares of Common Stock.

**Item 6.&nbsp;&nbsp;&nbsp;&nbsp;Indemnification of Directors and Officers.** 

The Registrant is a Delaware corporation. Section 145(a) of the Delaware General Corporation Law (the "DGCL") provides that a Delaware corporation may indemnify any person who was or is a party or is threatened to be made a party to any threatened, pending or completed action, suit or proceeding, whether civil, criminal, administrative or investigative (other than an action by or in the right of the corporation) by reason of the fact that the person is or was a director, officer, employee or agent of the corporation, or is or was serving at the request of the corporation as a director, officer, employee or agent of another corporation, partnership, joint venture, trust or other enterprise, against expenses (including attorneys' fees), judgments, fines and amounts paid in settlement actually and reasonably incurred by the person in connection with such action, suit or proceeding if the person acted in good faith and in a manner the person reasonably believed to be in or not opposed to the best interests of the corporation, and, with respect to any criminal action or proceeding, had no reasonable cause to believe the person's conduct was unlawful. The termination of any action, suit or proceeding by judgment, order, settlement, conviction, or upon a plea of nolo contendere or its equivalent, shall not, of itself, create a presumption that the person did not act in good faith and in a manner which the person reasonably believed to be in or not opposed to the best interests of the corporation, and, with respect to any criminal action or proceeding, had reasonable cause to believe that the person's conduct was unlawful.

Section 145(b) of the DGCL provides that a Delaware corporation may indemnify any person who was or is a party or is threatened to be made a party to any threatened, pending or completed action or suit by or in the right of the corporation to procure a judgment in its favor by reason of the fact that the person acted in any of the capacities set forth above, against expenses (including attorneys' fees) actually and reasonably incurred by the person in connection with the defense or settlement of such action or suit if the person acted under similar standards to those set forth above, except that no indemnification may be made in respect to any claim, issue or matter as to which such person shall have been adjudged to be liable to the corporation unless and only to the extent that the court in which such action or suit was brought shall determine that despite the adjudication of liability, in view of all the circumstances of the case, such person is fairly and reasonably entitled to be indemnified for such expenses which the court shall deem proper.

Section 145 of the DGCL further provides, among other things, that to the extent a present or former director or officer of the corporation has been successful in the defense of any action, suit or proceeding referred to

------

in subsection (a) and (b) of Section 145 or in the defense of any claim, issue or matter therein, such person shall be indemnified against expenses (including attorneys' fees) actually and reasonably incurred by him or her in connection therewith; that indemnification provided for by Section 145 shall not be deemed exclusive of any other rights to which the indemnified party may be entitled, and that the corporation may purchase and maintain insurance on behalf of a director or officer of the corporation against any liability asserted against such officer or director and incurred by him or her in any such capacity or arising out of his or her status as such, whether or not the corporation would have the power to indemnify him or her against such liabilities under Section 145.

As permitted by Section 102(b)(7) of the DGCL, the Registrant's certificate of incorporation provides that a director or officer shall not be liable to the Registrant or its stockholders for monetary damages for breach of fiduciary duty as a director. However, such provision does not eliminate or limit the liability of such person for acts or omissions not in good faith or for breaching his or her duty of loyalty, engaging in intentional misconduct or knowingly violating the law, paying a dividend or approving a stock repurchase which was illegal, or obtaining an improper personal benefit. A provision of this type has no effect on the availability of equitable remedies, such as injunction or rescission, for breach of fiduciary duty.

The Registrant's bylaws require that directors and officers be indemnified to the maximum extent permitted by Delaware law. In addition to the indemnification provisions in the Registrant's bylaws, the Registrant has entered into indemnification agreements with each director and executive officer of the Registrant. These indemnification agreements require that the Registrant indemnify each director and executive officer to the fullest extent permitted by the DGCL.

The indemnification agreements also require the Registrant to make prompt payment of expenses incurred by the director or executive officer in connection with any proceeding upon the request of the director or executive officer in advance of indemnification to the extent permitted by law.

The Registrant has a policy of directors' liability insurance which insures the directors and officers against the cost of defense, settlement or payment of a judgment under certain circumstances stated in the policy.

The above discussion of the DGCL and of the Registrant's certificate of incorporation, bylaws, and indemnification agreements is not intended to be exhaustive and is qualified in its entirety by such statute, certificate of incorporation, bylaws and indemnification agreements.

**Item 7.&nbsp;&nbsp;&nbsp;&nbsp;Exemption from Registration Claimed.** 

Not applicable.

------

**Item 8.&nbsp;&nbsp;&nbsp;&nbsp;Exhibits.** 

---

| | |
|:---|:---|
| Exhibit No. | Exhibit Description |
| 4.1 | <u>[Western Digital Corporation Amended and Restated 2005 Employee Stock Purchase Plan](https://www.sec.gov/Archives/edgar/data/106040/000162828025053809/exhibit101-espp2025planame.htm)[(incorporated by reference to Exhibit 10.1 of the Current Report on Form 8-K filed by the Company on November](https://www.sec.gov/Archives/edgar/data/106040/000162828025053809/exhibit101-espp2025planame.htm)[24](https://www.sec.gov/Archives/edgar/data/106040/000162828025053809/exhibit101-espp2025planame.htm)[, 2025).](https://www.sec.gov/Archives/edgar/data/106040/000162828025053809/exhibit101-espp2025planame.htm)</u> |
| 5.1\* | <u>[Opinion of Counsel.](exhibit51-opinionofcounsel.htm)</u> |
| 23.1\* | <u>[Consent of KPMG LLP (consent of independent registered public accounting firm).](exhibit231-consentofkpmg.htm)</u> |
| 23.2\* | <u>[Consent of Counsel (included in Exhibit 5.1).](exhibit51-opinionofcounsel.htm)</u> |
| 24.1\* | <u>[Power of Attorney (included on signature page hereto).](#ibe04e6e774024ef29009ff6247ac3ffb_3848290697391)</u> |
| 107\* | <u>[Calculation of Filing Fee Table.](exfilingfees11242025.htm)</u> |

---

____________

\*Filed herewith.

**Item 9.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Undertakings.** 

(a) The undersigned Registrant hereby undertakes:

&nbsp;&nbsp;&nbsp;&nbsp;(1) To file, during any period in which offers or sales are being made, a post-effective amendment to this Registration Statement:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(i) To include any prospectus required by Section 10(a)(3) of the Securities Act;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(ii) To reflect in the prospectus any facts or events arising after the effective date of the Registration Statement (or the most recent post-effective amendment thereof) which, individually or in the aggregate, represent a fundamental change in the information set forth in the Registration Statement. Notwithstanding the foregoing, any increase or decrease in volume of securities offered (if the total dollar value of securities offered would not exceed that which was registered) and any deviation from the low or high end of the estimated maximum offering range may be reflected in the form of prospectus filed with the Commission pursuant to Rule 424(b) if, in the aggregate, the changes in volume and price represent no more than 20% change in the maximum aggregate offering price set forth in the "Calculation of Registration Fee" table in the effective registration statement; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(iii) To include any material information with respect to the plan of distribution not previously disclosed in the Registration Statement or any material change to such information in the Registration Statement; *provided, however,* that paragraphs (a)(1)(i) and (a)(1)(ii) do not apply if the information required to be included in a post-effective amendment by those paragraphs is contained in reports filed with or furnished to the Commission by the Registrant pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 that are incorporated by reference in the Registration Statement;

&nbsp;&nbsp;&nbsp;&nbsp;(2) That, for the purpose of determining any liability under the Securities Act, each such post-effective amendment shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial *bona fide* offering thereof; and

&nbsp;&nbsp;&nbsp;&nbsp;(3) To remove from registration by means of a post-effective amendment any of the securities being registered which remain unsold at the termination of the offering.

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(b) The undersigned Registrant hereby undertakes that, for purposes of determining any liability under the Securities Act, each filing of the Registrant's annual report pursuant to Section 13(a) or Section 15(d) of the Exchange Act (and, where applicable, each filing of an employee benefit plan's annual report pursuant to Section 15(d) of the Exchange Act) that is incorporated by reference in the Registration Statement shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial *bona fide* offering thereof.

(c) Insofar as indemnification for liabilities arising under the Securities Act may be permitted to directors, officers and controlling persons of the Registrant pursuant to the foregoing provisions, or otherwise, the Registrant has been advised that in the opinion of the Commission such indemnification is against public policy as expressed in the Act and is, therefore, unenforceable. In the event that a claim for indemnification against such liabilities (other than the payment by the Registrant of expenses incurred or paid by a director, officer or controlling person of the Registrant in the successful defense of any action, suit or proceeding) is asserted by such director, officer or controlling person in connection with the securities being registered, the Registrant will, unless in the opinion of its counsel the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the question whether such indemnification by it is against public policy as expressed in the Act and will be governed by the final adjudication of such issue.

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**SIGNATURES** 

Pursuant to the requirements of the Securities Act of 1933, the Registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-8 and has duly caused this registration statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of San Jose, State of California, on November 24, 2025.

---

| | |
|:---|:---|
| **WESTERN DIGITAL CORPORATION** | **WESTERN DIGITAL CORPORATION** |
| By: | /s/ Cynthia L. Tregillis |
| Name: | Cynthia L. Tregillis |
| Title: | Executive Vice President, Chief Legal Officer and Secretary |

---

**POWER OF ATTORNEY** 

KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears below constitutes and appoints Irving Tan and Cynthia L. Tregillis, and each of them, acting individually and without the other, as his or her true and lawful attorneys-in-fact and agents, with full power of substitution and resubstitution, for him or her and in his or her name, place, and stead, in any and all capacities, to sign any and all amendments (including post-effective amendments, exhibits thereto and other documents in connection therewith) to this Registration Statement, and to file the same, with all exhibits thereto, and other documents in connection therewith, with the Commission, granting unto said attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the premises, as fully to all intents and purposes as he or she might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents, or either of them individually, or their or his or her substitute or substitutes, may lawfully do or cause to be done by virtue hereof.

Pursuant to the requirements of the Securities Act of 1933, this registration statement has been signed by the following persons in the capacities and on the date indicated.

------

---

| | | |
|:---|:---|:---|
| <u>Signature</u> | <u>Title</u> | <u>Date</u> |
| <u>/s/ Irving Tan&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</u><br>Irving Tan | Chief Executive Officer and Director<br>(*Principal Executive Officer*) | November 24, 2025 |
| <u>/s/ Kris Sennesael&nbsp;&nbsp;&nbsp;&nbsp;</u><br>Kris Sennesael | Executive Vice President and Chief Financial Officer <br>(*Principal Financial Officer*) | November 24, 2025 |
| <u>/s/ Brad Feller&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</u><br>Brad Feller | Senior Vice President, Global Accounting and Chief Accounting Officer<br>(*Principal Accounting Officer)* | November 24, 2025 |
| <u>/s/ Martin I. Cole&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</u><br>Martin I. Cole | Chair of the Board | November 24, 2025 |
| <u>/s/ Kimberly E. Alexy&nbsp;&nbsp;&nbsp;&nbsp;</u><br>Kimberly E. Alexy | Director | November 24, 2025 |
| <u>/s/ Tunç Doluca&nbsp;&nbsp;&nbsp;&nbsp;</u><br>Tunç Doluca  | Director | November 24, 2025 |
| <u>/s/ Bruce E. Kiddoo&nbsp;&nbsp;&nbsp;&nbsp;</u><br>Bruce E. Kiddoo  | Director | November 24, 2025 |
| <u>/s/ Matthew E. Massengill&nbsp;&nbsp;&nbsp;&nbsp;</u><br>Matthew E. Massengill | Director | November 24, 2025 |
| <u>/s/ Roxanne Oulman&nbsp;&nbsp;&nbsp;&nbsp;</u><br>Roxanne Oulman | Director | November 24, 2025 |
| <u>/s/ Stephanie A. Streeter&nbsp;&nbsp;&nbsp;&nbsp;</u><br>Stephanie A. Streeter | Director | November 24, 2025 |

---

## Ex-Filing

?xml version='1.0' encoding='ASCII'? EX-FILING FEES

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| |
|:---|
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **Calculation of Filing Fee Tables**  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **S-8**  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **WESTERN DIGITAL CORP**  |

---

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| | | | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|:---|:---|
| | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **Security Type**  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **Security Class Title**  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **Fee Calculation Rule**  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **Amount Registered**  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **Proposed Maximum Offering Price Per Unit**  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **Maximum Aggregate Offering Price**  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **Fee Rate**  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **Amount of Registration Fee**  |
| 1 | Equity | Common Stock, par value $0.01 per share, to be issued pursuant to the Western Digital Corporation Amended and Restated 2005 Employee Stock Purchase Plan (the ESPP) | Other | 8000000 | $130.12 | $1040960000.00 | 0.0001381 | $143756.58 |
| Total Offering Amounts: | Total Offering Amounts: | Total Offering Amounts: | Total Offering Amounts: | Total Offering Amounts: |  | $1040960000.00  |  | $143756.58  |
| Total Fee Offsets:  | Total Fee Offsets:  | Total Fee Offsets:  | Total Fee Offsets:  | Total Fee Offsets:  |  |  |  | $0.00  |
| Net Fee Due:  | Net Fee Due:  | Net Fee Due:  | Net Fee Due:  | Net Fee Due:  |  |  |  | $143756.58  |

---

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **Offering Note** <br>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <sup>1</sup> Pursuant to Rule 416(a) promulgated under the Securities Act of 1933, as amended (the Securities Act), this Registration Statement shall also cover any additional shares of Company common stock, par value $0.01 per share (Common Stock), that become issuable under the plans set forth herein by reason of any stock dividend, stock split, recapitalization or other similar transaction effected without Company receipt of consideration which results in an increase in the number of the outstanding shares of Common Stock, as applicable. Estimated solely for the purpose of calculating the registration fee pursuant to Rule 457(c) and Rule 457(h) under the Securities Act based upon a 5% discount from the average of the high and low prices of the Common Stock on the Nasdaq Global Select Market on November 21, 2025, such discount representing the maximum permissible discount offered pursuant to the ESPP.

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| | |
|:---|:---|
| | |
| **Rule 457(p)** | **Rule 457(p)** |
| Fee Offset Claims | N/A |
| Fee Offset Sources | N/A |

---

## Exhibit 5.1

**Exhibit 5.1**

[Company Letterhead]

November 24, 2025

Western Digital Corporation

5601 Great Oaks Parkway

San Jose, California 95119

&nbsp;&nbsp;&nbsp;&nbsp;Re:&nbsp;&nbsp;&nbsp;&nbsp;***Registration of Securities of Western Digital Corporation***

Ladies and Gentlemen:

In connection with the registration of up to an aggregate of 8,000,000 shares of Common Stock of Western Digital Corporation, a Delaware corporation (the "Company"), par value $0.01 per share (the "Shares"), under the Securities Act of 1933, as amended, pursuant to a Registration Statement on Form S-8 (the "Registration Statement") filed with the Securities and Exchange Commission on or about the date hereof, such Shares to be issued or delivered pursuant to the Western Digital Corporation Amended and Restated 2005 Employee Stock Purchase Plan (the "ESPP") with respect to 8,000,000 shares of Common Stock, you have requested my opinion set forth below.

In my capacity as counsel, I have examined originals or copies of those corporate and other records of the Company I considered appropriate.

On the basis of such examination and my consideration of those questions of law I considered relevant, and subject to the limitations and qualifications in this opinion, I am of the opinion that the Shares have been duly authorized by all necessary corporate action on the part of the Company and, when issued in accordance with such authorization, the provisions of the ESPP, and relevant agreements duly authorized by and in accordance with the terms of the ESPP, and upon payment for and delivery of the Shares as contemplated in accordance with the ESPP, and either (a) the countersigning of the certificate or certificates representing the Shares by a duly authorized signatory of the registrar for the Company's Common Stock, or (b) the book-entry of the Shares by the transfer agent for the Company's Common Stock in the name of The Depository Trust Company or its nominee, the Shares will be validly issued, fully paid and non-assessable.

I consent to your filing this opinion as an exhibit to the Registration Statement.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Respectfully submitted,

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;/s/ Cynthia L. Tregillis

&nbsp;&nbsp;&nbsp;&nbsp;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Cynthia L. Tregillis

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Executive Vice President, Chief Legal Officer and Secretary

## Exhibit 23.1

**Exhibit 23.1**

**Consent of Independent Registered Public Accounting Firm**

We consent to the use of our reported dated August 13, 2025, with respect to the consolidated financial statements of Western Digital Corporation and subsidiaries, and the effectiveness of internal control over financial reporting, incorporated herein by reference.

/s/ KPMG LLP

Santa Clara, California

November 24, 2025

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