[144] Western Digital Corp. SEC Filing

Rhea-AI Filing Summary

Western Digital Corp. (WDC) submitted a Form 144 notice reporting a proposed sale of 3,160 common shares through Morgan Stanley Smith Barney on 08/21/2025 with an aggregate market value of $239,148.80. The filing reports 346,922,126 shares outstanding, so the proposed sale represents approximately 0.00091% of shares outstanding. The securities listed were acquired on 08/20/2025 as 2,692 performance shares and 468 restricted shares, with payment marked as not applicable. The filing also discloses recent open-market sales by Gene M. Zamiska during June 2025 totaling 1,974 shares for aggregate gross proceeds reported across multiple trades. Several standard filer information fields (CIK, contact details) in the header are not completed in the provided text.

Insights

Securities Analyst

TL;DR: Routine insider sale notice; size is immaterial relative to outstanding shares and consistent with recent small disposals.

The Form 144 documents a near-term planned sale of 3,160 common shares via Morgan Stanley with an aggregate value of $239,148.80. Because the company has 346,922,126 shares outstanding, this transaction is immaterial to capitalization. The filing specifies recent acquisition of the sold shares as performance and restricted stock on 08/20/2025 and indicates market sales by the same named seller in June 2025 totaling 1,974 shares. This appears to be a routine insider sale notification rather than a material corporate event.

Compliance/Risk Analyst

TL;DR: Disclosure meets Rule 144 mechanics but some header fields are incomplete in the provided extract.

The notice includes required transaction-level details: security class, broker, acquisition dates and nature, proposed sale date, and recent dispositions. The filing shows same-day acquisition (08/20/2025) and near-term proposed sale (08/21/2025) of those grants, which is disclosed explicitly. The provided content omits filer identifiers and contact fields in the header, which are necessary for full regulatory traceability; that absence is noted in this extract rather than inferred about the actual filing completeness.

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK
Filer CCC
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.

Relationship to Issuer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	3160	239148.80	346922126	08/21/2025	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	08/20/2025	Performance Shares	ISSUER			2692	08/20/2025	Not Applicable
Common	08/20/2025	Restricted Stock	ISSUER			468	08/20/2025	Not Applicable

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
GENE M ZAMISKA 5601 Great Oaks Parkway San Jose CA 95119	Common	06/17/2025	245	14212.45
GENE M ZAMISKA 5601 Great Oaks Parkway San Jose CA 95119	Common	06/05/2025	565	31007.20
GENE M ZAMISKA 5601 Great Oaks Parkway San Jose CA 95119	Common	06/05/2025	812	44562.56
GENE M ZAMISKA 5601 Great Oaks Parkway San Jose CA 95119	Common	06/05/2025	352	19317.76

144: Remarks and Signature

Remarks

Date of Notice

Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1

ATTENTION:

The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.

Signature

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

What does the WDC Form 144 report?

The Form 144 reports a proposed sale of 3,160 WDC common shares through Morgan Stanley on 08/21/2025 with aggregate market value of $239,148.80.

How large is the proposed sale relative to Western Digital's outstanding shares?

The filing lists 346,922,126 shares outstanding, so the proposed sale is approximately 0.00091% of outstanding shares.

When were the shares being sold acquired?

The securities to be sold were acquired on 08/20/2025 as 2,692 performance shares and 468 restricted shares.

Were there recent sales by the same person?

Yes. The filing lists multiple sales by Gene M. Zamiska in June 2025 totaling 1,974 shares with reported gross proceeds across trades.

Which broker is handling the proposed sale?

The broker is listed as Morgan Stanley Smith Barney LLC Executive Financial Services located at 1 New York Plaza, 8th Floor, New York, NY.