Broker notice: proposed sale of 240 STX shares

Morgan Stanley Smith Barney LLC submitted a notice under Section 144 reporting a proposed sale of 240 common shares of STX, scheduled for 02/20/2026.

Accepted by SEC EDGAR 02/24/2026 - 04:29 PM EST Learn about SEC filing dates

Rhea-AI Filing Summary

Morgan Stanley Smith Barney LLC submitted a notice under Section 144 reporting a proposed sale of 240 common shares of STX, scheduled for 02/20/2026.

The filing also records prior 10b5-1 sales by John Morris of 113 common shares on 12/15/2025. The submission lists the broker address and indicates NASDAQ as the exchange.

Insights

Equity Capital Markets Analyst

Routine broker notice of planned insider sale; prior sale under a 10b5-1 plan is disclosed.

This Form 144 lists a proposed disposition of 240 common shares to be sold on 02/20/2026 and a prior 10b5-1 sale of 113 shares on 12/15/2025. The broker is identified as Morgan Stanley Smith Barney LLC on NASDAQ.

The filing is procedural: cash‑flow treatment and pricing details are not shown in the excerpt, and timing is explicit for the proposed sale. Subsequent transaction reports or confirmations would provide final execution details.

FAQ

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

What does the Form 144 for STX report?

The filing reports a proposed sale of 240 common shares of STX scheduled for 02/20/2026. It also records a prior 10b5-1 sale of 113 shares on 12/15/2025 by John Morris.

Who is the broker or filer named on the Form 144?

The filer is listed as Morgan Stanley Smith Barney LLC Executive Financial Services with an address at 1 New York Plaza, 8th Floor, New York, NY 10004, as shown in the excerpt.

Does the Form 144 show the sale price or proceeds for the STX shares?

The provided excerpt does not include sale price or aggregate proceeds. The filing lists share counts and dates but contains no dollar amounts for the transactions in the excerpt.

Was the prior sale by John Morris part of a trading plan?

Yes, the prior disposition of 113 common shares on 12/15/2025 is identified as a 10b5-1 sales plan in the excerpt.

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	0001988271
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	JOHN MORRIS
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	240	97776.00	218073067	02/24/2026	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	02/20/2026	Performance Stock Units	Issuer			240	02/20/2026	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 JOHN MORRIS 121 Woodlands Avenue 5 Singapore U0 739009	Common	12/15/2025	113	32983.57

144: Remarks and Signature

Remarks
Date of Notice	02/24/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	06/01/2025
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/ John Christopher Morris
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)