Seagate EVP sells 663 shares at $860.09

Seagate’s EVP & Chief Commercial Officer exercised RSUs into shares and sold 663 shares under a pre-arranged Rule 10b5-1 trading plan.

Rhea-AI Filing Summary

Seagate Technology Holdings plc (STX) reported that EVP & Chief Commercial Officer Teh Ban Seng conducted several equity transactions. On September 9, 2026, he exercised Restricted Share Units that converted into 600 and 663 Ordinary Shares, respectively, at no cash exercise price. On September 10, 2026, he sold 663 Ordinary Shares at $860.09 per share in an open-market or private transaction pursuant to a Rule 10b5-1 trading plan adopted on February 11, 2026. The RSUs were granted under Seagate’s equity incentive plans with four-year vesting schedules.

Insider Trade Summary 10b5-1

Exercise and sale activity reported; no spread calculated

Exercise and Sale 5 txns

Insider Teh Ban Seng

Role EVP & Chief Commercial Officer

Sold 663 shs ($570K)

Approx. gross sale proceeds $570K

Approx. exercise cost $0.00

Type	Security	Shares	Price	Value
Sale	Ordinary Shares F1	663	$860.09	$570K
Exercise	Restricted Share Unit F2	600	$0.00	$0.00
Exercise	Restricted Share Unit F3	663	$0.00	$0.00
Exercise	Ordinary Shares	600	$0.00	$0.00
Exercise	Ordinary Shares	663	$0.00	$0.00

Holdings After Transaction: Restricted Share Unit — 5,306 contracts (Direct); Ordinary Shares — 5,810 shares (Direct)

Footnotes (3)

1. F1. These Ordinary Shares were sold under a Rule 10b5-1 trading plan adopted by the Reporting Person on February 11, 2026.
2. F2. Consists of a grant of RSUs awarded to the Reporting Person under the Seagate Technology Holdings plc 2022 Equity Incentive Plan (the "2022 Plan"). One-quarter of the shares vested on September 9, 2023 and the remaining portion vested in equal quarterly installments over the following three years for a total vesting period of four years.
3. F3. Consists of a grant of RSUs awarded to the Reporting Person under the Plan. 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.

Key Figures

Ordinary Shares sold: 663 shares Sale price per Ordinary Share: $860.09 per share RSUs converted into Ordinary Shares: 1,263 RSUs +3 more

6 metrics

Ordinary Shares sold 663 shares Sale by EVP & Chief Commercial Officer on September 10, 2026

Sale price per Ordinary Share $860.09 per share 663-share sale on September 10, 2026 under Rule 10b5-1 plan

RSUs converted into Ordinary Shares 1,263 RSUs 600 and 663 RSUs exercised into Ordinary Shares on September 9, 2026

First RSU block converted 600 RSUs Grant under 2022 Equity Incentive Plan with four-year vesting starting September 9, 2023

Second RSU block converted 663 RSUs Grant under company equity plan with four-year vesting starting September 9, 2025

Rule 10b5-1 plan adoption date February 11, 2026 Plan governing the 663-share sale on September 10, 2026

Key Terms

Rule 10b5-1 trading plan, Restricted Share Unit, Equity Incentive Plan

3 terms

Rule 10b5-1 trading plan regulatory

"sold under a Rule 10b5-1 trading plan adopted by the Reporting Person"

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

Restricted Share Unit financial

"Consists of a grant of RSUs awarded to the Reporting Person"

A restricted share unit (RSU) is a promise by a company to give an employee a set number of company shares at a future date, typically after meeting time or performance conditions. For investors, RSUs matter because when they convert into actual shares they increase the number of shares outstanding (like unlocking more tickets in a game), which can dilute existing holders, and they align employee incentives with company performance, influencing behavior and long-term value.

Equity Incentive Plan financial

"under the Seagate Technology Holdings plc 2022 Equity Incentive Plan"

An equity incentive plan is a program that gives employees, executives or directors the right to receive company stock or options to buy stock as part of their pay. Think of it as offering slices of future company profit to motivate people to boost long‑term performance; for investors it matters because it can align employee goals with shareholder value but also increases the number of shares outstanding, which can dilute existing ownership.

FAQ

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

What insider transactions did Seagate (STX) report for Teh Ban Seng?

The filing reports that Teh Ban Seng exercised RSUs into 1,263 Ordinary Shares on September 9, 2026, and on September 10, 2026, he sold 663 Ordinary Shares at $860.09 per share in an open-market or private transaction.

Was the Seagate (STX) insider sale made under a Rule 10b5-1 plan?

Yes. The 663-share sale on September 10, 2026 was made under a Rule 10b5-1 trading plan adopted on February 11, 2026, as disclosed in the footnote and affirmed by the plan-status checkbox.

What RSUs did the Seagate (STX) EVP exercise in this Form 4?

On September 9, 2026, the EVP exercised two Restricted Share Unit awards, converting 600 RSUs and 663 RSUs into the same number of Ordinary Shares at a $0.00 exercise price, consistent with RSU mechanics.

What vesting schedule applied to the 600 RSUs reported by Seagate (STX)?

The 600 RSUs came from a grant under the 2022 Equity Incentive Plan, where one-quarter vested on September 9, 2023 and the remaining portion vested in equal quarterly installments over the following three years, for a total four-year vesting period.

What vesting schedule applied to the 663 RSUs reported by Seagate (STX)?

The 663 RSUs derived from a grant under the company’s equity plan, with one-quarter vesting on September 9, 2025 and the remaining portion scheduled to vest in equal quarterly installments over the following three years, for a total four-year vesting period.

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

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Available on EDGAR 09/11/2026 - 04:47 PM Accepted by SEC EDGAR 09/11/2026 - 04:47 PM Learn about SEC filing dates

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

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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

X

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^*

Teh Ban Seng

(Last) (First) (Middle)

SEAGATE TECHNOLOGY HOLDINGS PLC

47488 KATO ROAD

(Street)

FREMONT CALIFORNIA 94538

(City) (State) (Zip)

UNITED STATES

(Country)

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 & Chief Commercial Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/09/2026

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

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

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

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	09/09/2026		M		600	A	$0	5,810	D
Ordinary Shares	09/09/2026		M		663	A	$0	6,473	D
Ordinary Shares	09/10/2026		S		663(1)	D	$860.09	5,810	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	09/09/2026		M			600	(2)	(2)	Ordinary Shares	600	$0	0	D
Restricted Share Unit	$0	09/09/2026		M			663	(3)	(3)	Ordinary Shares	663	$0	5,306	D

Explanation of Responses:

1. These Ordinary Shares were sold under a Rule 10b5-1 trading plan adopted by the Reporting Person on February 11, 2026.

2. Consists of a grant of RSUs awarded to the Reporting Person under the Seagate Technology Holdings plc 2022 Equity Incentive Plan (the "2022 Plan"). One-quarter of the shares vested on September 9, 2023 and the remaining portion vested in equal quarterly installments over the following three years for a total vesting period of four years.

3. Consists of a grant of RSUs awarded to the Reporting Person under the Plan. 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.

Remarks:

	/s/ Louis J. Thorson, Attorney-in-Fact for Ban Seng Teh	09/11/2026
	** 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.
* Form 4: SEC 1474 (03-26)