Seagate officer plans $570K stock sale

Officer Ban Seng Teh has filed a Rule 144 notice to sell 663 STX shares, following several sizeable sales in the prior three months.

Rhea-AI Filing Summary

Seagate Technology Holdings plc (STX) received a notice under Rule 144 that officer Ban Seng Teh plans to sell 663 shares of common stock through Morgan Stanley Smith Barney LLC, with an aggregate market value of $570,239.67, around September 10, 2026 on NASDAQ.

Seagate reports 226,644,518 shares of common stock outstanding. During the prior three months, Ban Seng Teh reported additional sales of Seagate common stock, including 9,862 shares for $8,411,971.40 on August 21, 2026 and 6,048 shares for $5,098,254.74 on August 20, 2026.

Key Figures

Planned shares to be sold: 663 shares Aggregate market value of planned sale: $570,239.67 Shares outstanding: 226,644,518 shares +4 more

7 metrics

Planned shares to be sold 663 shares Common stock to be sold by Ban Seng Teh under Rule 144

Aggregate market value of planned sale $570,239.67 Value of 663 common shares to be sold

Shares outstanding 226,644,518 shares Seagate common stock outstanding as referenced in the notice

Sale on August 21, 2026 9,862 shares; $8,411,971.40 Common shares sold by Ban Seng Teh during past 3 months

Sale on August 20, 2026 6,048 shares; $5,098,254.74 Common shares sold by Ban Seng Teh during past 3 months

Sale on August 13, 2026 7,361 shares; $6,778,028.17 Common shares sold by Ban Seng Teh during past 3 months

Sale on June 12, 2026 989 shares; $870,507.91 Common shares sold by Ban Seng Teh during past 3 months

Key Terms

Rule 144, Restricted Stock, aggregate market value

3 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 financial

"Common | 09/09/2026 | Restricted Stock | Issuer"

Shares granted to an individual that carry limits on transfer or sale until certain conditions are met, such as staying with the company for a set time or hitting performance targets. Think of them as a locked gift that gradually opens; for investors they matter because they affect how many shares may enter the market later, signal management incentives and potential dilution, and reveal confidence in future company performance.

aggregate market value financial

"Common | Morgan Stanley Smith Barney LLC ... | 663 | 570239.67"

Aggregate market value is the combined price you would pay to buy all outstanding shares of a company or all companies in a group at current market prices — essentially the sum of each stock’s market capitalization. It matters to investors because it shows the overall size and weight of an investment or sector (like the total cost to buy every piece of a puzzle), helps compare scale across companies or markets, and influences index composition and risk exposure.

FAQ

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

The filing reports that officer Ban Seng Teh intends to sell 663 STX common shares under Rule 144, with an aggregate market value of $570,239.67. This is a disclosure of a planned sale by an affiliate, not a transaction by Seagate itself.

How many STX shares is Ban Seng Teh planning to sell in this Form 144?

Ban Seng Teh plans to sell 663 shares of Seagate common stock. The notice lists an aggregate market value of $570,239.67 for these shares and identifies Morgan Stanley Smith Barney LLC as the broker, with an approximate sale date of September 10, 2026 on NASDAQ.

How many Seagate (STX) shares are outstanding according to this Form 144?

The filing states that there are 226,644,518 shares of Seagate common stock outstanding. This figure provides context for the reported 663-share planned sale under Rule 144 and the prior sales disclosed for the last three months.

What STX shares has Ban Seng Teh sold in the last three months?

The notice lists several prior sales of Seagate common stock: 9,862 shares for $8,411,971.40 on August 21, 2026, 6,048 shares for $5,098,254.74 on August 20, 2026, 7,361 shares for $6,778,028.17 on August 13, 2026, and 989 shares for $870,507.91 on June 12, 2026.

What type of Seagate (STX) security is covered in this Form 144 filing?

The filing covers common stock of Seagate Technology Holdings plc. The securities to be sold are described as Restricted Stock, with the issuer listed as Seagate and trading venue given as NASDAQ for the planned sale through Morgan Stanley Smith Barney LLC.

Who is the broker for the planned STX share sale in this Form 144?

The broker named is Morgan Stanley Smith Barney LLC Executive Financial Services, located at 1 New York Plaza, 8th Floor, New York, NY 10004. The Form 144 indicates the planned sale of 663 Seagate common shares through this broker on NASDAQ.

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

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Available on EDGAR 09/10/2026 - 04:05 PM Accepted by SEC EDGAR 09/10/2026 - 04:04 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	0001801425
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	65 6018 2562
Name of Person for Whose Account the Securities are To Be Sold	BAN SENG TEH
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	663	570239.67	226644518	09/10/2026	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	09/09/2026	Restricted Stock	Issuer			663	09/09/2026	Not Applicable

* 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
BAN SENG TEH 121 Woodlands Avenue 5 Singapore U0 739009	Common	08/21/2026	9862	8411971.40
BAN SENG TEH 121 Woodlands Avenue 5 Singapore U0 739009	Common	08/20/2026	6048	5098254.74
BAN SENG TEH 121 Woodlands Avenue 5 Singapore U0 739009	Common	08/13/2026	7361	6778028.17
BAN SENG TEH 121 Woodlands Avenue 5 Singapore U0 739009	Common	06/12/2026	989	870507.91

144: Remarks and Signature

Remarks
Date of Notice	09/10/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	02/11/2026
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/ Banseng Teh
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)