Seagate (STX) Form 144 Reveals 20,000-Share Proposed Sale via Morgan Stanley

Rhea-AI Filing Summary

Form 144 notice for Seagate Technology Holdings plc (STX) discloses a proposed sale of 20,000 common shares through Morgan Stanley Smith Barney LLC on NASDAQ with an aggregate market value of $4,721,200 and shares outstanding of 212,677,178. The shares were acquired as RSUs/PSUs on 09/09/2024 (20,000 shares) with payment recorded the same day. The filing also reports two Rule 10b5-1 sales attributed to William Mosley: 20,000 shares sold on 09/02/2025 for $3,379,482 and 20,000 shares sold on 08/01/2025 for $3,074,962. The filer represents no undisclosed material adverse information and indicates reliance on 10b5-1 where applicable.

Insights

Financial Analyst

TL;DR: Insider sale disclosure shows routine RSU/PSU monetization and prior 10b5-1 plan sales; not obviously material to company fundamentals.

The filing documents a proposed sale of 20,000 common shares with an aggregate market value of $4,721,200, acquired as RSUs/PSUs on 09/09/2024. Two recent 10b5-1 sales by William Mosley totaling 40,000 shares generated roughly $6.45 million in gross proceeds during August–September 2025. As a proportion of 212,677,178 shares outstanding, the disclosed sale size is small. The disclosure conforms to Rule 144 and notes reliance on 10b5-1 mechanisms, which supports procedural compliance but does not itself indicate company performance changes.

Corporate Governance Expert

TL;DR: Filing shows proper insider reporting and use of 10b5-1 plans; transparency is positive though insider selling is disclosed.

The notice identifies the broker, sale date (approximate date 10/01/2025), acquisition method (RSUs/PSUs on 09/09/2024), and recent aggregated 10b5-1 sales. The signature representation affirms no undisclosed material adverse information. These elements reflect standard insider compliance practices. The document lacks the filer CIK and named filer contact information in the provided extract, which are typically present in full filings.

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

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	20000	4721200.00	212677178	10/01/2025	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	09/09/2024	RSUs/PSUs	Issuer			20000	09/09/2024	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	09/02/2025	20000	3379482.00
10b5-1 Sales for WILLIAM MOSLEY 121 Woodlands Avenue 5 Singapore U0 739009	Common	08/01/2025	20000	3074962.00

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)