Seagate officer James C. Lee proposes 600-share sale

The proposed sale is described as an issuer-mandated sell-to-cover solely for tax withholding, following 1,237 shares of restricted stock unit vesting.

Rhea-AI Filing Summary

Seagate Technology Holdings plc Officer James C. Lee reported a proposed sale of 600 common shares, with an aggregate market value of $379,785.06. The sale is scheduled for October 23, 2026, through Morgan Stanley on NasdaqGS, and is described as an issuer-mandated sell-to-cover solely to satisfy tax withholding obligations. The notice also lists 1,237 shares from restricted stock unit vesting on October 22, 2026, for compensation for services. Dawn Ledbetter signed as attorney-in-fact for James C. Lee.

Key Figures

Proposed sale: 600 shares Aggregate market value: $379,785.06 Shares outstanding: 226,644,518 shares +1 more

4 metrics

Proposed sale 600 shares Common stock proposed for sale

Aggregate market value $379,785.06 Proposed sale

Shares outstanding 226,644,518 shares Issuer shares outstanding

Restricted stock unit vesting 1,237 shares October 22, 2026; compensation for services

Key Terms

sell-to-cover, Restricted Stock Unit Vesting, Rule 144

3 terms

sell-to-cover financial

"issuer mandated sell-to-cover solely to satisfy tax withholding obligations"

Sell-to-cover is when part of newly issued or exercised company stock is immediately sold to pay required taxes and fees, so the recipient keeps the remaining shares. For investors this matters because it reduces the number of shares insiders or employees actually hold after a grant, can create small, routine share sales that aren’t signal of cashing out, and slightly increases share supply on the market—like selling a portion of a paycheck to cover the tax bill.

Restricted Stock Unit Vesting financial

"Restricted Stock Unit Vesting"

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.

FAQ

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How many STX shares does James C. Lee plan to sell?

Officer James C. Lee reported a proposed sale of 600 common shares of Seagate Technology Holdings plc.

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Available on EDGAR 10/23/2026 - 06:46 PM EDT Accepted by SEC EDGAR 10/23/2026 - 06:46 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 plc
SEC File Number	001-31560
Address of Issuer	121 WOODLANDS AVENUE 5 SINGAPORE SINGAPORE 739009
Phone	65 6412 5172
Name of Person for Whose Account the Securities are To Be Sold	Lee James CI
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 Stock	Morgan Stanley 1 New York Plaza 8th Floor New York NY 10004	600	379785.06	226644518	10/23/2026	NASDAQGS

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 stock	10/22/2026	Restricted Stock Unit Vesting	Issuer			1237	10/22/2026	Compensation for services

* 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 C. Lee 47488 Kato Road Fremont CA 94538	Common Stock	07/22/2026	543	491419.72
James C. Lee 47488 Kato Road Fremont CA 94538	Common Stock	07/31/2026	22	608950.30
James C. Lee 47488 Kato Road Fremont CA 94538	Common Stock	08/21/2026	668	567156.67
James C. Lee 47488 Kato Road Fremont CA 94538	Common Stock	08/21/2026	755	641262.87
James C. Lee 47488 Kato Road Fremont CA 94538	Common Stock	08/21/2026	2516	2136976.68
James C. Lee 47488 Kato Road Fremont CA 94538	Common Stock	08/21/2026	9013	7163925.72

144: Remarks and Signature

Remarks	Sales to be made pursuant to Issuer mandated sell-to-cover solely to satisfy tax withholding obligations.
Date of Notice	10/23/2026
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/ Dawn Ledbetter. Attorney-in-Fact for James C. Lee
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)