Seagate officer plans $404K tax-cover sale

An officer of Seagate Technology Holdings plc filed a Rule 144 notice for a small planned stock sale linked to tax-withholding obligations.

Available on EDGAR 09/14/2026 - 08:07 PM EDT Accepted by SEC EDGAR 09/14/2026 - 08:06 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

Seagate Technology Holdings plc (STX) discloses that officer John Christopher Morris has filed a notice to sell common stock under Rule 144, using Morgan Stanley as broker. The filing reports a planned sale of 518 shares, with earlier sales tied to issuer-mandated sell-to-cover for tax withholding.

Key Figures

Shares planned for sale: 518 shares Aggregate market value of planned sale: $404,405.00 Shares acquired via RSU vesting: 942 shares +3 more

6 metrics

Shares planned for sale 518 shares Common stock to be sold under Rule 144

Aggregate market value of planned sale $404,405.00 Planned Rule 144 sale of 518 shares

Shares acquired via RSU vesting 942 shares Common stock acquired September 11, 2026 as compensation for services

Sale on August 3, 2026 168 shares for $137,383.68 Common stock sold during past three months

Sale on August 21, 2026 4,039 shares for $3,420,119.36 Common stock sold during past three months

Sale on September 10, 2026 892 shares for $769,234.55 Common stock sold during past three months

Key Terms

Rule 144, Restricted Stock Unit Vesting, sell-to-cover, compensation for services

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 Unit Vesting financial

"Common stock | 09/11/2026 | Restricted Stock Unit Vesting | Issuer"

sell-to-cover financial

"Sales to be made pursuant to Issuer mandated sell-to-cover solely"

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.

compensation for services financial

"942 | 09/11/2026 | Compensation for services"

FAQ

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

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

It discloses that officer John Christopher Morris plans to sell 518 shares of Seagate common stock under Rule 144, with Morgan Stanley as broker, and notes that related sales are issuer-mandated sell-to-cover transactions to satisfy tax withholding obligations.

How many Seagate (STX) shares are planned to be sold under this Form 144?

The filing lists a planned sale of 518 shares of Seagate common stock, with an aggregate market value of $404,405.00, to be sold through Morgan Stanley on NASDAQGS on September 14, 2026.

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

The filing states that 942 shares of Seagate common stock were acquired on September 11, 2026 through Restricted Stock Unit vesting from the issuer as compensation for services, and shares are being sold to cover tax withholding.

What Seagate (STX) stock sales occurred in the past three months for this insider?

The notice reports sales of Seagate common stock of 168 shares for $137,383.68 on August 3, 2026, 4,039 shares for $3,420,119.36 on August 21, 2026, and 892 shares for $769,234.55 on September 10, 2026.

Are the reported Seagate (STX) stock sales discretionary sales by the insider?

The remarks state that the sales are to be made pursuant to issuer-mandated sell-to-cover transactions, conducted solely to satisfy tax withholding obligations, indicating they are tied to tax requirements on equity compensation.

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

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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	518	404405.00	226644518	09/14/2026	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	09/11/2026	Restricted Stock Unit Vesting	Issuer			942	09/11/2026	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	08/03/2026	168	137383.68
John C. Morris 47488 Kato Rd. Fremont CA 94538	Common Stock	08/21/2026	4039	3420119.36
John C. Morris 47488 Kato Rd Fremont CA 94538	Common Stock	09/10/2026	892	769234.55

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	09/14/2026
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)