Insider plans sale of 6,780 WDC shares

A shareholder associated with WDC has filed a Rule 144 notice to sell restricted stock.

Rhea-AI Filing Summary

A shareholder associated with WDC has filed a Rule 144 notice to sell restricted stock. The filing shows an intention to sell 6,780 shares of common stock through Morgan Stanley Smith Barney LLC, with an aggregate market value of $1,833,922.20 and 339,037,922 shares of common stock outstanding.

The shares to be sold were acquired as restricted stock from the issuer on several dates in late 2024 and on January 20, 2025. The filer, Cynthia Lock Tregillis, has also sold common shares of the issuer in the past three months, including 2,801 shares on December 2, 2025 and 447 shares on January 21, 2026 for gross proceeds of $449,751.53 and $102,363.00, respectively.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What does the Form 144 filing related to WDC disclose?

The Form 144 notice discloses an intention to sell 6,780 shares of WDC common stock. It lists the planned broker, aggregate market value, outstanding shares, how the stock was acquired, and recent sales by the same seller during the prior three months.

How many WDC shares are planned to be sold under this Form 144?

The filing shows a planned sale of 6,780 common shares of the issuer. These shares are to be sold through Morgan Stanley Smith Barney LLC, with an indicated aggregate market value of $1,833,922.20 and reference to 339,037,922 common shares outstanding.

Who is the seller in the WDC-related Form 144 and which broker is used?

The seller identified is Cynthia Lock Tregillis, who is filing for the sale of common stock. The planned broker is Morgan Stanley Smith Barney LLC Executive Financial Services, based at 1 New York Plaza, 8th Floor, New York, NY 10004, for execution on NASDAQ.

What recent WDC share sales by the same person are disclosed?

The notice lists two recent sales by Cynthia Lock Tregillis. She sold 2,801 common shares on December 2, 2025 for gross proceeds of $449,751.53 and 447 common shares on January 21, 2026 for gross proceeds of $102,363.00, both from the same issuer.

How were the WDC shares in this Form 144 originally acquired?

The shares were acquired as restricted stock directly from the issuer on several dates. The table shows acquisitions on November 20, November 25, November 27, 2024 and January 20, 2025, with the number of securities and corresponding payment dates detailed for each grant.

When is the approximate sale date for the WDC shares under this Form 144?

The filing lists an approximate sale date of February 6, 2026 for the 6,780 common shares. It also states that trading will occur on NASDAQ, using Morgan Stanley Smith Barney LLC as the broker for executing the planned transactions.

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

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Accepted by SEC EDGAR 02/06/2026 - 04:02 PM EST Learn about SEC filing dates

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	0002057088
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	WESTERN DIGITAL CORPORATION
SEC File Number	001-08703
Address of Issuer	5601 Great Oaks Parkway San Jose CALIFORNIA 95119
Phone	(408) 717-6000
Name of Person for Whose Account the Securities are To Be Sold	CYNTHIA LOCK TREGILLIS
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	Officer

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	6780	1833922.20	339037922	02/06/2026	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	11/27/2024	Restricted Stock	Issuer			101	11/27/2024	Not Applicable
Common	11/20/2024	Restricted Stock	Issuer			322	11/20/2024	Not Applicable
Common	11/25/2024	Restricted Stock	Issuer			654	11/25/2024	Not Applicable
Common	01/20/2025	Restricted Stock	Issuer			5703	01/20/2025	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
CYNTHIA LOCK TREGILLIS 5601 Great Oaks Parkway San Jose CA 95119	Common	01/21/2026	447	102363.00
Cynthia LOCK TREGILLIS 5601 Great Oaks Parkway San Jose CA 95119	Common	12/02/2025	2801	449751.53

144: Remarks and Signature

Remarks
Date of Notice	02/06/2026
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	/s/ Cynthia Lock Tregillis
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)