Seagate officer plans $518K tax-cover sale

An officer of Seagate Technology Holdings plc plans a small Rule 144 sell-to-cover transaction to satisfy tax withholding on vested restricted stock units.

Rhea-AI Filing Summary

Seagate Technology Holdings plc (STX) has a notice of proposed sales under Rule 144 filed on behalf of officer John Christopher Morris. The notice covers a planned sale of 601 shares of common stock on or after September 10, 2026, with an aggregate market value of $518,022.27.

The shares relate to restricted stock units vesting on September 9, 2026 (631 and 500 underlying shares) granted as compensation for services. The filing states that sales will be made pursuant to issuer-mandated sell-to-cover transactions solely to satisfy tax withholding obligations, not as discretionary open-market sales.

Key Figures

Shares proposed to be sold: 601 shares Aggregate market value of proposed sale: $518,022.27 RSU-related shares vesting (lot 1): 631 shares +5 more

8 metrics

Shares proposed to be sold 601 shares Planned Rule 144 sale of Seagate common stock as of September 10, 2026

Aggregate market value of proposed sale $518,022.27 Value of the 601 Seagate common shares covered by the notice

RSU-related shares vesting (lot 1) 631 shares Common stock underlying restricted stock units vesting on September 9, 2026 as compensation for services

RSU-related shares vesting (lot 2) 500 shares Additional common stock underlying restricted stock units vesting on September 9, 2026 as compensation for services

Sale on June 10, 2026 574 shares for $471,426.41 Common stock sold by John Christopher Morris during the prior three months

Sale on June 12, 2026 1,364 shares for $1,200,579.16 Common stock sold by John Christopher Morris during the prior three months

Sale on August 3, 2026 168 shares for $137,383.68 Common stock sold by John Christopher Morris during the prior three months

Sale on August 21, 2026 4,039 shares for $3,420,119.36 Common stock sold by John Christopher Morris during the prior three months

Key Terms

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

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 Unit Vesting financial

"Common stock | 09/09/2026 | Restricted Stock Unit Vesting | Issuer"

sell-to-cover financial

"Sales to be made pursuant to 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.

FAQ

What amount of Seagate (STX) stock is covered by this Rule 144 notice?

The notice covers a proposed sale of 601 shares of Seagate common stock with an aggregate market value of $518,022.27, as indicated in the securities information section.

Who is selling Seagate (STX) shares under this Form 144 and in what capacity?

The planned sale is for the account of John Christopher Morris, identified as an officer of Seagate Technology Holdings plc, with the shares relating to vested restricted stock units granted as compensation.

What is the purpose of the Seagate (STX) stock sale disclosed in this Form 144?

The filing states that sales are to be made pursuant to issuer mandated sell-to-cover transactions, used solely to satisfy tax withholding obligations associated with vesting of restricted stock units.

When are the Seagate (STX) restricted stock units vesting that underlie this Form 144 sale?

The restricted stock units vest on September 9, 2026. Two vesting events are listed, tied to 631 shares and 500 shares, each described as “Restricted Stock Unit Vesting” for compensation for services.

What Seagate (STX) stock sales has John Christopher Morris reported in the past three months?

In the past three months, the filing lists four common stock sales: 574 shares for $471,426.41 on June 10, 2026; 1,364 shares for $1,200,579.16 on June 12, 2026; 168 shares for $137,383.68 on August 3, 2026; and 4,039 shares for $3,420,119.36 on August 21, 2026.

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

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Available on EDGAR 09/10/2026 - 07:41 PM Accepted by SEC EDGAR 09/10/2026 - 07:40 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 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	Morris John Christopher
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	601	518022.27	226644518	09/10/2026	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	09/09/2026	Restricted Stock Unit Vesting	Issuer			631	09/09/2026	Compensation for services
Common Stock	09/09/2026	Restricted Stock Unit Vesting	Issuer			500	09/09/2026	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
John C. Morris 47488 Kato Rd Fremont CA 94538	Common Stock	06/10/2026	574	471426.41
John C. Morris 47488 Kato Road Fremont CA 94538	Common Stock	06/12/2026	1364	1200579.16
John C. Morris 47488 Kato Rd Fremont CA 94538	Common Stock	08/03/2026	168	137383.68
John C. Morris 47488 Kato Rd. Fremont CA 94538	Common Stock	08/21/2026	4039	3420119.36

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	09/10/2026
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 John C. Morris
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)