[Form 4] Seagate Technology Holdings PLC Insider Trading Activity

Rhea-AI Filing Summary

Seagate Technology Holdings plc (STX) Form 4 filed for Kian Fatt Chong, EVP Global Operations, reports transactions dated 09/09/2025 consisting of multiple grants of Restricted Share Units (RSUs) that vested or partially vested and converted to Ordinary Shares and a small ESPP purchase previously acquired on July 31, 2025 that is exempt from reporting under Rule 16b-3.

The filing shows RSU-related acquisitions of 1,198; 201; 1,516; and 560 Ordinary Shares (each recorded with Transaction Code M and $0 price) and indicates the Reporting Person beneficially owned 4,384 Ordinary Shares after the final listed transaction. The Form is signed by an attorney-in-fact on 09/11/2025.

Positive

• Form 4 discloses multiple RSU vestings converting to Ordinary Shares on 09/09/2025, reflecting transparent insider compensation reporting
• Reporting Person beneficially owned 4,384 Ordinary Shares following the reported transactions, as stated in the filing
• Includes a 30-share ESPP purchase on July 31, 2025 that is explicitly noted as exempt under Rule 16b-3

Negative

• None.

Insights

Financial Analyst

TL;DR: Routine insider vesting and an ESPP purchase increased the reporting person's direct share count; no sales or exercised options reported.

The Form 4 documents standard equity compensation events: four RSU vesting transactions and a small Employee Stock Purchase Plan acquisition of 30 shares (exempt under Rule 16b-3). All transactions are coded "M," reflect $0 price consistent with vesting, and increase direct beneficial ownership to the reported totals. There are no cash proceeds, dispositions, or derivative exercisable positions disclosed in this filing. For investors, this is a disclosure of compensation-related share accrual rather than a change driven by market trading.

Corporate Governance Expert

TL;DR: Disclosure reflects standard compensation vesting schedule and compliance with Section 16 reporting; timing aligns with multi-year vesting terms.

The explanatory notes specify the RSUs were granted under the issuer's Equity Incentive Plan with multi-year vesting schedules (one-quarter at anniversaries or quarterly installments thereafter). One RSU grant vested 100% on the first anniversary. The filing includes the required signature by an attorney-in-fact. This Form 4 fulfills insider reporting obligations and documents no unusual or ad hoc transfers.

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^*

Chong Kian Fatt

(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 Global Operations

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

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	09/09/2025		M		1,198	A	$0	2,107(1)	D
Ordinary Shares	09/09/2025		M		201	A	$0	2,308	D
Ordinary Shares	09/09/2025		M		1,516	A	$0	3,824	D
Ordinary Shares	09/09/2025		M		560	A	$0	4,384	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	09/09/2025		M			1,198	(2)	(2)	Ordinary Shares	1,198	$0	0	D
Restricted Share Unit	$0	09/09/2025		M			201	(3)	(3)	Ordinary Shares	201	$0	807	D
Restricted Share Unit	$0	09/09/2025		M			1,516	(4)	(4)	Ordinary Shares	1,516	$0	4,549	D
Restricted Share Unit	$0	09/09/2025		M			560	(5)	(5)	Ordinary Shares	560	$0	0	D

Explanation of Responses:

1. Includes 30 Ordinary Shares purchased by Reporting Person on July 31, 2025 under the Issuer's Employee Stock Purchase Plan. Such acquisition is exempt from reporting pursuant to Rule 16b-3 under the Securities Exchange Act of 1934.

2. Consists of a grant of RSUs awarded to the Reporting Person under the Seagate Technology plc Equity Incentive Plan (the "Plan"). Subject to the Reporting Person's continuous employment, one-quarter of the shares vested starting on September 9, 2022 and each one-year anniversary thereafter for a total vesting period of four years.

3. Consists of a grant of RSUs awarded to the reporting person under the Plan. Subject to the Reporting Person's continuous employment, one-quarter of the shares vested 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.

4. Consists of a grant of RSUs awarded to the Reporting Person under the Plan. Subject to the Reporting Person's continuous employment one-quarter of the shares 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.

5. Consists of a grant of RSUs awarded to the Reporting Person under the Plan. Such RSUs vested 100% on September 9, 2025, the first anniversary of the grant.

Remarks:

	/s/ Louis J. Thorson, Attorney-in-Fact for Kian Fatt Chong	09/11/2025
	** 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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What did Kian Fatt Chong report on the Form 4 for STX?

The Form 4 reports RSU vestings on 09/09/2025 resulting in acquisitions of 1,198; 201; 1,516; and 560 Ordinary Shares and notes a 30-share ESPP purchase on July 31, 2025.

Did the Form 4 report any sales or cash proceeds by the insider?

No. All transactions shown are acquisitions/vestings reported with Transaction Code M at a $0 price; no dispositions or cash proceeds are reported.

How many Ordinary Shares did the reporting person own after the transactions?

The filing states the reporting person beneficially owned 4,384 Ordinary Shares following the reported transactions.

Were the RSU grants subject to vesting conditions?

Yes. Explanatory notes state the RSUs were awarded under the Equity Incentive Plan and vest on multi-year schedules (one-quarter at anniversary or quarterly installments) with one grant vesting 100% on its first anniversary.

Who signed the Form 4 and when?

The Form 4 was signed by Louis J. Thorson, Attorney-in-Fact for Kian Fatt Chong on 09/11/2025.