MOSLEY files two 10b5-1 stock sales

MOSLEY reported planned sales of common stock under 10b5-1 plans.

Accepted by SEC EDGAR 03/02/2026 - 04:40 PM EST Learn about SEC filing dates

Rhea-AI Filing Summary

MOSLEY reported planned sales of common stock under 10b5-1 plans. The excerpt lists two 10b5-1 sale entries: 20,000 shares on 01/02/2026 and 20,000 shares on 02/02/2026, each identified as common stock. Broker/placement details include Morgan Stanley Smith Barney LLC.

FAQ

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

What transactions does the Form 144 for STX show?

The Form 144 shows two 10b5-1 sales totaling 40,000 shares. The entries list 20,000 shares sold on 01/02/2026 and 20,000 shares sold on 02/02/2026, both as common stock under 10b5-1 plans.

Who is the broker or placement agent listed on the Form 144?

Morgan Stanley Smith Barney LLC is shown as the broker. The filing includes an address for Morgan Stanley Smith Barney LLC and references its role in the reported transactions.

What sale amounts are disclosed for each 10b5-1 transaction?

The excerpt lists dollar figures alongside each 20,000-share sale. The 01/02/2026 entry shows 5,711,244.00 and the 02/02/2026 entry shows 8,585,358.00 associated with those sales in the excerpt.

Are the sales tied to a specific security type or award?

Yes — the sales are of common stock and reference Performance Stock Units. The excerpt also lists an award date of 09/09/2018 for Performance Stock Units related to the securities.

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

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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	0001388390
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	SEAGATE TECHNOLOGY HOLDINGS PUBLIC LIMITED COMPANY
SEC File Number	001-31560
Address of Issuer	121 Woodlands Avenue 5 Singapore SINGAPORE 739009
Phone	6560182562
Name of Person for Whose Account the Securities are To Be Sold	WILLIAM MOSLEY
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	Director
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	20000	8156800.00	218073067	03/02/2026	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	09/09/2018	Performance Stock Units	Issuer			20000	09/09/2018	N/A

* 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
10b5-1 Sales for WILLIAM MOSLEY 121 Woodlands Avenue 5 Singapore U0 739009	Common	02/02/2026	20000	8585358.00
10b5-1 Sales for WILLIAM MOSLEY 121 Woodlands Avenue 5 Singapore U0 739009	Common	01/02/2026	20000	5711244.00

144: Remarks and Signature

Remarks	The securities to be sold were or will be acquired upon the vesting of performance stock units during the period of 9/9/18 through 9/22/18
Date of Notice	03/02/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	02/20/2025
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/ William D. Mosley
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)