Vanguard Portfolio Management (WDC) discloses 3.6% Western Digital ownership in 13G/A

Rhea-AI Filing Summary

Vanguard Portfolio Management LLC filed an amended Schedule 13G reporting beneficial ownership of 13,196,274 shares of Western Digital Corp common stock. This represents 3.6% of the company’s outstanding common shares as of June 30, 2026.

Vanguard reports sole voting power over 86,800 shares and sole dispositive power over 13,196,274 shares, with no shared voting or dispositive power. The position reflects holdings managed by Vanguard Portfolio Management and specified affiliates for Vanguard funds and other clients, and no other individual person has an interest in more than 5% of the class through these holdings.

Key Figures

Beneficial ownership: 13,196,274 shares Percent of class: 3.6% Sole voting power: 86,800 shares +1 more

4 metrics

Beneficial ownership 13,196,274 shares Western Digital common stock beneficially owned as reported in the Schedule 13G/A

Percent of class 3.6% Portion of Western Digital common stock outstanding as of June 30, 2026

Sole voting power 86,800 shares Shares of Western Digital over which Vanguard has sole voting power

Sole dispositive power 13,196,274 shares Shares of Western Digital over which Vanguard has sole dispositive power

Key Terms

beneficially owned, dispositive power, voting power, Investment Company Act of 1940

4 terms

beneficially owned financial

"this reflects the securities beneficially owned, or deemed to be beneficially owned, by Vanguard"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

dispositive power financial

"Sole Dispositive Power 13,196,274.00"

Dispositive power is the authority to decide the final outcome of an asset, legal claim, contract, or corporate action — in effect the power to dispose of or resolve something. For investors it matters because whoever holds that authority can determine who gets paid, who controls an asset or vote, and how risks and returns are allocated; think of it like holding the key that lets you lock in the winner or loser in a deal.

voting power financial

"Sole Voting Power 86,800.00 6 | Shared Voting Power 0.00"

Voting power is the ability shareholders have to influence a company's major decisions—like electing the board, approving mergers, or changing corporate rules—based on the voting rights attached to the shares they hold. For investors it matters because greater voting power is like holding more keys to a building: it gives you a stronger say over management choices and the company’s strategy, which can affect future value and risk.

Investment Company Act of 1940 regulatory

"investment companies registered under the Investment Company Act of 1940 and other managed accounts"

A U.S. federal law that sets the rulebook for pooled investment vehicles such as mutual funds, exchange-traded funds and similar money managers, requiring them to register with regulators, disclose holdings and fees, limit conflicts of interest, and follow governance standards. It matters to investors because these protections and transparency rules act like a referee and scoreboard, helping people compare funds, trust that managers follow fair practices, and spot hidden costs or risks.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 07/31/2026 - 11:39 AM Accepted by SEC EDGAR 07/31/2026 - 11:39 AM Learn about SEC filing dates

FAQ

What stake does Vanguard Portfolio Management report in Western Digital (WDC)?

Vanguard Portfolio Management reports beneficial ownership of 13,196,274 shares of Western Digital common stock, representing 3.6% of the outstanding class as of June 30, 2026.

How much voting power does Vanguard have in Western Digital (WDC)?

Vanguard reports sole voting power over 86,800 shares of Western Digital and no shared voting power, indicating most shares are held with dispositive but not voting authority.

What dispositive power does Vanguard hold over Western Digital (WDC) shares?

Vanguard reports sole dispositive power over 13,196,274 shares of Western Digital common stock and no shared dispositive power, meaning it can decide how those shares are disposed or sold.

Why is Western Digital (WDC) reported as 5 percent or less of the class?

The filing states Vanguard’s holdings represent 3.6% of Western Digital’s common stock, so it reports “Ownership of 5 percent or less of a class” under the relevant item.

Who benefits from Vanguard’s Western Digital (WDC) holdings?

The securities are held for Vanguard funds and other managed accounts. Vanguard notes that no single other person has an interest in more than 5% of the class through these holdings.

Who signed the Vanguard Schedule 13G/A for Western Digital (WDC)?

The report was signed by My Trieu-Gatt, identified as Authorized Signatory, Head of Global Fund Administration, on July 31, 2026.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 1)

Western Digital Corp

(Name of Issuer)

Common Stock

(Title of Class of Securities)

958102105

(CUSIP Number)

06/30/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 958102105

1

Names of Reporting Persons

Vanguard Portfolio Management

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

PENNSYLVANIA

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 86,800.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 13,196,274.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

13,196,274.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

3.60 %

12

Type of Reporting Person (See Instructions)

IA

Comment for Type of Reporting Person: In accordance with SEC Release No. 34-39538 (January 12, 1998), this Schedule 13G reflects the securities beneficially owned, or deemed to be beneficially owned, by Vanguard Portfolio Management LLC and the following affiliates of Vanguard Portfolio Management LLC or business divisions of such affiliates: Vanguard Fiduciary Trust Company and Vanguard Global Advisers, LLC. This Schedule 13G includes securities held by Vanguard funds, or sleeves thereof, over which Vanguard Portfolio Management LLC exercises dispositive power, in addition to securities held by clients over which the affiliates or business divisions of such affiliates indicated above exercise dispositive and/or voting power. This Schedule 13G does not include securities, if any, beneficially owned by other subsidiaries or affiliates of Vanguard Portfolio Management LLC, or business divisions of such subsidiaries whose ownership of securities is disaggregated from that of the reporting business unit in accordance with such release.

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Western Digital Corp
(b)	Address of issuer's principal executive offices: 5601 Great Oaks Parkway, San Jose, CA, 95119
Item 2.
(a)	Name of person filing: Vanguard Portfolio Management
(b)	Address or principal business office or, if none, residence: 100 Vanguard Blvd,, Malvern, PA, 19355
(c)	Citizenship: PA
(d)	Title of class of securities: Common Stock
(e)	CUSIP No.: 958102105
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: 13196274
(b)	Percent of class: 3.6 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 86800
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 13196274
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	Ownership of 5 Percent or Less of a Class.
	Ownership of 5 percent or less of a class
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required. Vanguard Portfolio Management, including investment companies registered under the Investment Company Act of 1940 and other managed accounts, have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, the securities reported herein.No one other person's interest in the securities reported herein is more than 5%.
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Vanguard Portfolio Management

Signature:	My Trieu-Gatt
Name/Title:	Authorized Signatory, Head of Global Fund Administration
Date:	07/31/2026