[Form 4] Seagate Technology Holdings plc Insider Trading Activity

Rhea-AI Filing Summary

Seagate Technology Holdings plc (STX) director Dylan G. Haggart reported equity transactions. On 10/19/2025, he acquired 2,693 ordinary shares at $0 via the conversion of restricted share units (Code M), then disposed of 647 shares for tax withholding at $225.40 per share (Code F). He now holds 14,515 shares directly.

The RSUs were granted under the Seagate Technology Holdings plc 2022 Equity Incentive Plan, with each RSU representing one ordinary share. Subject to continuous service, shares are released on the earlier of one year from grant or the next annual general meeting following the fiscal year ending June 27, 2025, provided that meeting is at least fifty weeks after the prior year's meeting.

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

OMB APPROVAL

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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^*

Haggart Dylan G.

(Last) (First) (Middle)

SEAGATE TECHNOLOGY HOLDINGS 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)

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

3. Date of Earliest Transaction (Month/Day/Year)
10/19/2025

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	10/19/2025		M		2,693	A	$0	15,162	D
Ordinary Shares	10/19/2025		F		647	D	$225.4	14,515	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	10/19/2025		M			2,693	(1)	(1)	Ordinary Shares	2,693	$0	0	D

Explanation of Responses:

1. Consists of a grant of restricted share units (RSUs) awarded to the Reporting Person under the Seagate Technology Holdings plc 2022 Equity Incentive Plan for no consideration. Each RSU represents a contingent right to receive one Ordinary Share of the Issuer. Subject to the Reporting Person's continuous service with the Issuer, shares will be released to the Reporting Person on the earlier of (i) one year from the date of grant and (ii) the date of the next annual general meeting of shareholders of the Issuer following the end of the fiscal year ending on June 27, 2025, provided such annual general meeting is at least fifty (50) weeks after the immediately preceding fiscal year's annual general meeting.

Remarks:

	/s/ Louis A. Thorson, Attorney-in-fact for Dylan G. Haggart	10/21/2025
	** 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 STX director Dylan G. Haggart report on 10/19/2025?

He converted RSUs into 2,693 ordinary shares at $0 (Code M) and had 647 shares withheld for taxes at $225.40 (Code F).

How many shares does Dylan G. Haggart own after the transactions?

He directly owns 14,515 ordinary shares following the reported transactions.

What was the price for the RSU share release and for the tax withholding?

The RSU conversion price was $0; the tax withholding disposal price was $225.40 per share.

Under which plan were the RSUs granted?

The RSUs were granted under the Seagate Technology Holdings plc 2022 Equity Incentive Plan.

What are the RSU share release conditions mentioned?

Shares release on the earlier of one year from grant or the next annual general meeting following the fiscal year ending June 27, 2025, if at least fifty weeks after the prior meeting.

Were any derivative securities held after the transactions?

No. The number of derivative securities beneficially owned after was 0, per Table II.