Seagate (NASDAQ: STX) officer plans $435K stock sale

Rhea-AI Filing Summary

Seagate Technology Holdings plc (STX) had an officer, John Morris, file a notice under Rule 144 to sell 523 shares of common stock. The shares are to be sold on 08/20/2026 on NASDAQ through Morgan Stanley Smith Barney LLC following an exercise of stock options for cash.

The filing also lists prior sales of Seagate common stock by John Morris during the preceding three months under a Rule 10b5-1 trading plan and directly, including individual transactions of 168, 898, 466, and 574 shares with corresponding dollar amounts.

Key Figures

Planned shares to be sold: 523 shares Aggregate market value of planned sale: $435,428.88 Shares sold on 08/03/2026: 168 shares +5 more

8 metrics

Planned shares to be sold 523 shares Common stock sale planned for 08/20/2026 following stock option exercise

Aggregate market value of planned sale $435,428.88 Value associated with 523 shares of common stock in the planned Rule 144 sale

Shares sold on 08/03/2026 168 shares 10b5-1 sale of common stock for $137,383.68

Proceeds on 08/03/2026 sale $137,383.68 10b5-1 sale of 168 shares of common stock

Shares sold on 06/12/2026 (10b5-1) 898 shares 10b5-1 sale of common stock for $790,410.62

Proceeds on 06/12/2026 (10b5-1) sale $790,410.62 10b5-1 sale of 898 shares of common stock

Shares sold on 06/10/2026 574 shares Sale of common stock for $471,631.83

Proceeds on 06/10/2026 sale $471,631.83 Sale of 574 shares of common stock

Key Terms

Rule 144, 10b5-1, Exercise of Stock Options, Form 144

4 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144."

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

10b5-1 regulatory

"10b5-1 Sales for JOHN MORRIS 121 Woodlands Avenue 5 Singapore"

A 10b5-1 plan is a pre-set schedule that lets company insiders buy or sell shares according to written instructions made when they do not possess material, nonpublic information. Think of it as a timed automatic payment for stock trades: it helps insiders avoid accusations of trading on secret information and gives outside investors a clearer signal about whether sales are routine or potentially informative about the company’s prospects.

Exercise of Stock Options financial

"Common | 08/20/2026 | Exercise of Stock Options | Issuer"

Form 144 regulatory

"144: Securities Sold During The Past 3 Months"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

FAQ

What does the Form 144 filing disclose for Seagate Technology Holdings plc (STX)?

The filing discloses that officer John Morris plans to sell 523 shares of Seagate common stock on 08/20/2026 on NASDAQ, with the shares coming from an exercise of stock options and to be sold through Morgan Stanley Smith Barney LLC for cash.

How many Seagate (STX) shares is John Morris planning to sell under this Form 144?

John Morris is planning to sell 523 shares of Seagate common stock. The planned sale date is 08/20/2026, and the transaction is associated with an exercise of stock options and a cash sale through Morgan Stanley Smith Barney LLC on NASDAQ.

What prior Seagate (STX) stock sales by John Morris are listed in the last three months?

The notice lists prior sales of Seagate common stock: 168 shares for $137,383.68 on 08/03/2026, 898 shares for $790,410.62 on 06/12/2026, 466 shares for $410,168.54 on 06/12/2026, and 574 shares for $471,631.83 on 06/10/2026.

Are the recent Seagate (STX) stock sales by John Morris under a 10b5-1 plan?

Yes. The filing identifies certain recent sales as 10b5-1 Sales for JOHN MORRIS, including transactions on 08/03/2026 involving 168 shares and on 06/12/2026 involving 898 shares, executed under a Rule 10b5-1 trading plan.

What is the source of the Seagate (STX) shares to be sold by John Morris?

The 523 shares of Seagate common stock that John Morris plans to sell on 08/20/2026 are reported as arising from an Exercise of Stock Options, with the method of sale described as a cash transaction through a brokerage firm.

Which broker is handling the planned Seagate (STX) share sale by John Morris?

The planned sale of 523 shares of Seagate common stock by John Morris is to be handled by Morgan Stanley Smith Barney LLC Executive Financial Services, located at 1 New York Plaza, 8th Floor, New York, NY 10004, with trading on NASDAQ.

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

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Available on EDGAR 08/20/2026 - 04:36 PM Accepted by SEC EDGAR 08/20/2026 - 04:35 PM 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	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	523	435428.88	226644518	08/20/2026	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	08/20/2026	Exercise of Stock Options	Issuer			523	08/20/2026	Cash

* 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	08/03/2026	168	137383.68
10b5-1 Sales for JOHN MORRIS 121 Woodlands Avenue 5 Singapore U0 739009	Common	06/12/2026	898	790410.62
JOHN C MORRIS 121 Woodlands Avenue 5 Singapore U0 739009	Common	06/12/2026	466	410168.54
JOHN C MORRIS 121 Woodlands Avenue 5 Singapore U0 739009	Common	06/10/2026	574	471631.83

144: Remarks and Signature

Remarks
Date of Notice	08/20/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	01/29/2026
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/ John Morris
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)