Managed Account Advisors discloses 2.6% Western Digital (WDC) share stake

Rhea-AI Filing Summary

Managed Account Advisors LLC filed an amended Schedule 13G showing its beneficial ownership of Western Digital common stock. The firm reports holding 9,026,563 shares, representing 2.6% of the outstanding shares based on the issuer’s October 23, 2025 share count.

The firm has no power to vote these shares but holds sole dispositive power over 9,003,114 shares and shared dispositive power over 23,449 shares. It states the position is held in the ordinary course of business and not to influence control of Western Digital.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 2)

WESTERN DIGITAL CORP

(Name of Issuer)

Common Stock

(Title of Class of Securities)

958102105

(CUSIP Number)

12/31/2025

(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 9,003,114.00
8	Shared Dispositive Power 23,449.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

9,026,563.00

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)

2.6 %

12

Type of Reporting Person (See Instructions)

IA

Comment for Type of Reporting Person: The beneficial ownership calculation relies on the 341,899,281 outstanding shares disclosed in the Form 10-Q by the issuer on October 31, 2025, which reports share totals as of October 23, 2025.

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: 9,026,563.00
(b)	Percent of class: 2.6%
(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: 9,003,114.00
	(iv) Shared power to dispose or to direct the disposition of: 23,449.00
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.
	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:	/s/ Andres Ortiz
Name/Title:	Authorized Signatory
Date:	02/10/2026

FAQ

What does Western Digital (WDC) Schedule 13G/A from Managed Account Advisors report?

The filing reports that Managed Account Advisors LLC beneficially owns Western Digital common stock. It discloses 9,026,563 shares, equal to 2.6% of the company’s outstanding shares, held in the ordinary course of business without the purpose of influencing control.

How many Western Digital shares does Managed Account Advisors LLC own?

Managed Account Advisors LLC reports beneficial ownership of 9,026,563 Western Digital common shares. This position is calculated using 341,899,281 outstanding shares reported by Western Digital as of October 23, 2025, resulting in an ownership percentage of approximately 2.6%.

What percentage of Western Digital’s stock is owned by Managed Account Advisors?

The filing states that Managed Account Advisors LLC beneficially owns 2.6% of Western Digital’s outstanding common stock. This percentage is based on 341,899,281 shares outstanding, as disclosed in Western Digital’s Form 10-Q reporting share totals as of October 23, 2025.

Does Managed Account Advisors LLC have voting power over its Western Digital shares?

No, the filing reports zero voting power over the Western Digital shares. Managed Account Advisors LLC has sole dispositive power over 9,003,114 shares and shared dispositive power over 23,449 shares, meaning it can decide on their disposition but not vote them.

Why is Managed Account Advisors’ Western Digital ownership reported as under 5 percent?

Item 5 of the filing indicates ownership of 5 percent or less of Western Digital’s common stock. With 9,026,563 shares beneficially owned out of 341,899,281 outstanding, Managed Account Advisors’ position is reported at 2.6% of the class.

On what date was the ownership position in Western Digital measured in this 13G/A?

The statement identifies December 31, 2025 as the date of the event requiring the filing. The ownership percentage is calculated using the outstanding share count Western Digital reported as of October 23, 2025 in its Form 10-Q.

Who signed the Managed Account Advisors Schedule 13G/A for Western Digital?

The Schedule 13G/A was signed by Andres Ortiz as Authorized Signatory for Managed Account Advisors LLC. The signature section certifies that the information provided is true, complete, and correct to the best of the signer’s knowledge and belief.