[SCHEDULE 13G] Western Digital Corp. SEC Filing

Rhea-AI Filing Summary

Managed Account Advisors LLC reports beneficial ownership of 22,178,966 shares of Western Digital Corp common stock, representing 6.4% of the class. The filing states the adviser has sole dispositive power over 22,176,462 shares and shared dispositive power over 2,504 shares, while reporting no sole or shared voting power.

The statement affirms the shares are held in the ordinary course of business and not for the purpose of changing or influencing control of the issuer. This disclosure provides investors with material transparency about a sizeable economic stake without indicating voting influence or an expressed intent to alter corporate control.

Insights

Financial Analyst

TL;DR A material, non-voting economic stake of 6.4%; notable for ownership concentration and potential liquidity implications.

The reported 22,178,966-share position is large enough to affect measures of free float and shareholder concentration analysis for Western Digital. Because the filer reports dispositive power but no voting power, the stake appears economically significant yet likely passive regarding governance. For valuation or event-driven strategies, the position signals a meaningful holder that could affect secondary-market supply if dispositions occur, but the filing contains no statements about intent to trade or engage with management.

Corporate Governance Expert

TL;DR Material economic ownership without voting authority limits governance influence despite disclosure crossing the 5% threshold.

The filing discloses a >5% economic stake, which is material for transparency and regulatory purposes. However, the absence of sole or shared voting power means the holder does not report direct control over corporate votes, reducing immediate governance implications. The certification that holdings are not intended to change control further supports a passive posture. This is impactful as disclosure but does not by itself signal a governance engagement or challenge to management.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

WESTERN DIGITAL CORP

(Name of Issuer)

Common Stock

(Title of Class of Securities)

958102105

(CUSIP Number)

06/30/2025

(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)

SCHEDULE 13G

CUSIP No. 958102105

1

Names of Reporting Persons

MANAGED ACCOUNT ADVISORS LLC

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

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 22,176,462.00
8	Shared Dispositive Power 2,504.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

22,178,966.00

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)

6.4 %

12

Type of Reporting Person (See Instructions)

IV

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, CALIFORNIA, 95119
Item 2.
(a)	Name of person filing: MANAGED ACCOUNT ADVISORS LLC
(b)	Address or principal business office or, if none, residence: 101 HUDSON STREET 9TH FLOOR JERSEY CITY, NJ 07302
(c)	Citizenship: Delaware
(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: 22,178,966.00
(b)	Percent of class: 6.4%
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 0.00
	(ii) Shared power to vote or to direct the vote: 0.00
	(iii) Sole power to dispose or to direct the disposition of: 22,176,462.00
	(iv) Shared power to dispose or to direct the disposition of: 2,504.00
Item 5.	Ownership of 5 Percent or Less of a Class.
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
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.

MANAGED ACCOUNT ADVISORS LLC

Signature:	John Capelli
Name/Title:	Authorized Signatory
Date:	08/13/2025