Seagate Technology (STX) CTO discloses RSU-related share moves on December 9, 2025

Rhea-AI Filing Summary

Seagate Technology Holdings plc executive vice president and chief technology officer John C. Morris reported equity compensation-related share movements dated December 9, 2025. He acquired 499 and 631 ordinary shares at a price of $0 per share through the conversion of restricted share units and disposed of 228 and 288 ordinary shares at $282.86 per share.

After these transactions, he directly beneficially owned 13,852 ordinary shares. He also continued to hold 1,498 and 6,948 restricted share units granted under the Seagate Technology Holdings plc 2022 Equity Incentive Plan, with each grant vesting over a four-year period: one quarter of the shares vested on September 9, 2023 and September 9, 2025 respectively, and the remaining portions vest in equal quarterly installments over the following three years, subject to his continuous employment.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Morris John Christopher

(Last) (First) (Middle)

SEAGATE TECHNOLOGY PLC

47488 KATO ROAD

(Street)

FREMONT CA 94538

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Seagate Technology Holdings plc [ STX ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	EVP & CTO

3. Date of Earliest Transaction (Month/Day/Year)
12/09/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Ordinary Shares	12/09/2025		M		499	A	$0	13,737	D
Ordinary Shares	12/09/2025		F		228	D	$282.86	13,509	D
Ordinary Shares	12/09/2025		M		631	A	$0	14,140	D
Ordinary Shares	12/09/2025		F		288	D	$282.86	13,852	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Restricted Share Unit	$0	12/09/2025		M			499	(1)	(1)	Ordinary Shares	499	$0	1,498	D
Restricted Share Unit	$0	12/09/2025		M			631	(2)	(2)	Ordinary Shares	631	$0	6,948	D

Explanation of Responses:

1. Consists of a grant of RSUs awarded to the Reporting Person under the Seagate Technology Holdings plc 2022 Equity Incentive Plan (the "2022 Plan"). Subject to the Reporting Person's continuous employment, such RSUs vested as to one-quarter of the shares on September 9, 2023 and the remaining portion shall vest in equal quarterly installments over the following three years for a total vesting period of four years.

2. Consists of a grant of RSUs awarded to the Reporting Person under the 2022 Plan. Subject to the Reporting Person's continuous employment one-quarter vested on September 9, 2025 and the remaining portion shall vest in equal quarterly installments over the following three years for a total vesting period of four years.

Remarks:

	/s/ Louis J. Thorson, Attorney-in-Fact for John C. Morris	12/11/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
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FAQ

What did Seagate Technology's EVP & CTO report in this SEC filing for STX?

The filing shows that John C. Morris, EVP & CTO of Seagate Technology Holdings plc, reported acquisitions and dispositions of ordinary shares on December 9, 2025 that occurred in connection with the conversion of restricted share units granted under the company’s 2022 Equity Incentive Plan.

How many Seagate ordinary shares does John C. Morris own after the December 9, 2025 transactions?

Following the reported transactions on December 9, 2025, John C. Morris beneficially owned 13,852 ordinary shares of Seagate Technology Holdings plc directly.

What ordinary share amounts were acquired and disposed of by the Seagate CTO on December 9, 2025?

On December 9, 2025, he acquired 499 and 631 ordinary shares at a price of $0 per share and disposed of 228 and 288 ordinary shares at a price of $282.86 per share.

What restricted share unit (RSU) grants are referenced for Seagate Technology (STX), and how do they vest?

The filing references two RSU grants under the Seagate Technology Holdings plc 2022 Equity Incentive Plan. For the first, one quarter of the shares vested on September 9, 2023, with the remaining portion vesting in equal quarterly installments over the following three years for a total vesting period of four years, subject to continuous employment. For the second, one quarter vested on September 9, 2025, with the remaining portion vesting in equal quarterly installments over the following three years, also for a four-year total vesting period, subject to continuous employment.

How many restricted share units does John C. Morris continue to hold after the reported transactions?

After the December 9, 2025 transactions, the filing shows that John C. Morris beneficially owned 1,498 restricted share units from one grant and 6,948 restricted share units from another grant.

Under which plan were the Seagate RSUs in this filing granted?

The restricted share units described in the filing were granted to the reporting person under the Seagate Technology Holdings plc 2022 Equity Incentive Plan, referred to as the “2022 Plan.”