Seagate officer plans $7.7M stock sale

Seagate Technology Holdings plc (STX) officer James Lee has filed a notice of proposed sale of company stock under Rule 144.

Rhea-AI Filing Summary

Seagate Technology Holdings plc (STX) officer James Lee has filed a notice of proposed sale of company stock under Rule 144. The notice covers up to 9,013 shares of common stock, to be sold through Morgan Stanley Smith Barney LLC on NASDAQ.

The shares include 4,032 shares issuable upon the exercise of stock options dated August 24, 2026, and 4,981 shares from restricted stock units dated August 20, 2026. The filing lists an aggregate market value of approximately 7,661,050.00 for the proposed sale. It also discloses several prior sales of Seagate common stock by James Lee during the past three months, including some conducted pursuant to a Rule 10b5-1 trading plan.

Key Figures

Shares proposed for sale: 9,013 shares of common stock Aggregate market value of proposed sale: 7,661,050.00 Shares from stock option exercise: 4,032 shares +4 more

7 metrics

Shares proposed for sale 9,013 shares of common stock Maximum amount covered by James Lee’s Rule 144 notice

Aggregate market value of proposed sale 7,661,050.00 Aggregate market value for the 9,013 Seagate common shares in the notice

Shares from stock option exercise 4,032 shares Seagate common shares underlying stock options dated August 24, 2026

Shares from restricted stock units 4,981 shares Seagate common shares from RSUs dated August 20, 2026

Past sale on August 21, 2026 3,938 shares for 3,344,759.20 Seagate common shares sold by James Lee in the prior 3 months

Past sale on July 30, 2026 694 shares for 608,950.30 Seagate common shares sold, noted as 10b5-1 sales

Past sale on July 23, 2026 542 shares for 490,514.72 Earlier Seagate common share sale by James Lee

Key Terms

Rule 144, restricted stock units, 10b5-1, Exercise of Stock Options

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.

restricted stock units financial

"Common | 08/20/2026 | Restricted Stock Units | Issuer"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

10b5-1 regulatory

"10b5-1 Sales for JAMES C LEE 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 | 08/24/2026 | Exercise of Stock Options | Issuer"

FAQ

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

How many Seagate (STX) shares does James Lee plan to sell under this Form 144?

James Lee filed to sell up to 9,013 shares of Seagate common stock. The filing lists these shares with an aggregate market value of about 7,661,050.00, to be sold through Morgan Stanley Smith Barney LLC on NASDAQ.

What is the source of the Seagate (STX) shares James Lee plans to sell?

The planned sale covers 4,032 shares from the exercise of stock options dated August 24, 2026 and 4,981 shares from restricted stock units dated August 20, 2026, all in Seagate common stock.

Which broker is handling James Lee’s planned Seagate (STX) share sale?

The proposed sale of up to 9,013 Seagate common shares is listed as being through Morgan Stanley Smith Barney LLC Executive Financial Services, located at 1 New York Plaza, New York, on NASDAQ.

What prior Seagate (STX) stock sales by James Lee are disclosed in this Form 144?

The filing lists past 3‑month sales of Seagate common stock by James Lee: 3,938 shares on August 21, 2026 for 3,344,759.20, 694 shares on July 30, 2026 for 608,950.30, and 542 shares on July 23, 2026 for 490,514.72.

Were any of James Lee’s recent Seagate (STX) stock sales under a 10b5-1 plan?

Yes. The Form 144 notes “10b5-1 Sales” for James C. Lee in connection with Seagate common stock sales, including sales such as the 694 shares on July 30, 2026 for 608,950.30.

What key dates are associated with James Lee’s planned Seagate (STX) stock sales?

The Form 144 ties the 4,032 option shares to August 24, 2026 and the 4,981 RSU shares to August 20, 2026. Prior sales disclosed occurred on August 21, 2026, July 30, 2026, and July 23, 2026.

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

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Available on EDGAR 08/24/2026 - 04:32 PM EDT Accepted by SEC EDGAR 08/24/2026 - 04:31 PM EDT 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	0001773423
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	JAMES LEE
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	9013	7661050.00	226644518	08/24/2026	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	08/24/2026	Exercise of Stock Options	Issuer			4032	08/24/2026	Cash
Common	08/20/2026	Restricted Stock Units	Issuer			4981	08/20/2026	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
JAMES LEE 121 Woodlands Avenue 5 Singapore U0 739009	Common	08/21/2026	3938	3344759.20
10b5-1 Sales for JAMES C LEE 121 Woodlands Avenue 5 Singapore U0 739009	Common	07/30/2026	694	608950.30
JAMES LEE 121 Woodlands Avenue 5 Singapore U0 739009	Common	07/23/2026	542	490514.72

144: Remarks and Signature

Remarks
Date of Notice	08/24/2026
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/ James Lee
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)