Seagate CEO William D. Mosley sells 6,720 shares

The CEO's sales were reported as made under a trading plan adopted February 18, 2026.

Available on EDGAR 11/03/2026 - 04:59 PM EST Accepted by SEC EDGAR 11/03/2026 - 04:59 PM EST Learn about SEC filing dates

Rhea-AI Filing Summary

Seagate Technology Holdings plc (STX) CEO William D. Mosley sold 6,720 ordinary shares in 14 direct transactions on November 2, 2026, at reported prices ranging from $617.6681 to $644.43 per share. All transactions were effected pursuant to a Rule 10b5-1 trading plan adopted on February 18, 2026.

Insider Trade Summary 10b5-1

Net Seller: 6,720 shares

Net Sell 14 txns

Insider MOSLEY WILLIAM D

Role CEO

Sold 6,720 shs ($4.19M)

Type	Security	Shares	Price	Value
Sale	Ordinary Shares F1, F2	960	$617.6681	$593K
Sale	Ordinary Shares F3	760	$618.7973	$470K
Sale	Ordinary Shares F4	1,160	$619.5962	$719K
Sale	Ordinary Shares F5	720	$620.8028	$447K
Sale	Ordinary Shares F6	1,080	$621.8948	$672K
Sale	Ordinary Shares F7	240	$623.0083	$150K
Sale	Ordinary Shares F8	640	$623.9094	$399K
Sale	Ordinary Shares F9	320	$625.6788	$200K
Sale	Ordinary Shares	80	$632.55	$51K
Sale	Ordinary Shares F10	240	$633.6367	$152K
Sale	Ordinary Shares F11	160	$636.08	$102K
Sale	Ordinary Shares	120	$640.46	$77K
Sale	Ordinary Shares	160	$642.78	$103K
Sale	Ordinary Shares F12	80	$644.43	$52K

Holdings After Transaction: Ordinary Shares — 346,108.25 shares (Direct)

Footnotes (12)

1. F1. All transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on February 18, 2026.
2. F2. These Ordinary Shares were sold in multiple trades at prices ranging from $617.17 to $618.16. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
3. F3. These Ordinary Shares were sold in multiple trades at prices ranging from $618.18 to $619.17. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
4. F4. These Ordinary Shares were sold in multiple trades at prices ranging from $619.19 to $620.16. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
5. F5. These Ordinary Shares were sold in multiple trades at prices ranging from $620.32 to $621.11. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
6. F6. These Ordinary Shares were sold in multiple trades at prices ranging from $621.36 to $622.28. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
7. F7. These Ordinary Shares were sold in multiple trades at prices ranging from $622.41 to $623.40. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
8. F8. These Ordinary Shares were sold in multiple trades at prices ranging from $623.41 to $624.22. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
9. F9. These Ordinary Shares were sold in multiple trades at prices ranging from $625.03 to $625.97. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
10. F10. These Ordinary Shares were sold in multiple trades at prices ranging from $633.55 to $633.79. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
11. F11. These Ordinary Shares were sold in multiple trades at prices ranging from $635.59 to $636.55. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
12. F12. These Ordinary Shares were sold in multiple trades at prices ranging from $644.36 to $644.50. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.

Key Figures

Ordinary shares sold: 6,720 shares Sale transaction: 960 shares at $617.6681 per share Sale transaction: 80 shares at $644.43 per share

3 metrics

Ordinary shares sold 6,720 shares 14 direct transactions on November 2, 2026

Sale transaction 960 shares at $617.6681 per share November 2, 2026

Sale transaction 80 shares at $644.43 per share November 2, 2026

Key Terms

Rule 10b5-1 trading plan, weighted average sale price

2 terms

Rule 10b5-1 trading plan regulatory

"effected pursuant to a Rule 10b5-1 trading plan"

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.

weighted average sale price financial

"The price reported above reflects the weighted average sale price"

FAQ

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

How many shares did the STX CEO sell, and at what prices?

William D. Mosley sold 6,720 STX ordinary shares across 14 direct transactions on November 2, 2026; reported per-share prices ranged from $617.6681 to $644.43.

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

Form 4 Insider Transactions: What Each Field Means →

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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^*

MOSLEY WILLIAM D

(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)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
11/02/2026

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	11/02/2026		S		960(1)	D	$617.6681(2)	351,868.25	D
Ordinary Shares	11/02/2026		S		760	D	$618.7973(3)	351,108.25	D
Ordinary Shares	11/02/2026		S		1,160	D	$619.5962(4)	349,948.25	D
Ordinary Shares	11/02/2026		S		720	D	$620.8028(5)	349,228.25	D
Ordinary Shares	11/02/2026		S		1,080	D	$621.8948(6)	348,148.25	D
Ordinary Shares	11/02/2026		S		240	D	$623.0083(7)	347,908.25	D
Ordinary Shares	11/02/2026		S		640	D	$623.9094(8)	347,268.25	D
Ordinary Shares	11/02/2026		S		320	D	$625.6788(9)	346,948.25	D
Ordinary Shares	11/02/2026		S		80	D	$632.55	346,868.25	D
Ordinary Shares	11/02/2026		S		240	D	$633.6367(10)	346,628.25	D
Ordinary Shares	11/02/2026		S		160	D	$636.08(11)	346,468.25	D
Ordinary Shares	11/02/2026		S		120	D	$640.46	346,348.25	D
Ordinary Shares	11/02/2026		S		160	D	$642.78	346,188.25	D
Ordinary Shares	11/02/2026		S		80	D	$644.43	346,108.25(12)	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

Explanation of Responses:

1. All transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on February 18, 2026.

2. These Ordinary Shares were sold in multiple trades at prices ranging from $617.17 to $618.16. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.

3. These Ordinary Shares were sold in multiple trades at prices ranging from $618.18 to $619.17. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.

4. These Ordinary Shares were sold in multiple trades at prices ranging from $619.19 to $620.16. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.

5. These Ordinary Shares were sold in multiple trades at prices ranging from $620.32 to $621.11. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.

6. These Ordinary Shares were sold in multiple trades at prices ranging from $621.36 to $622.28. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.

7. These Ordinary Shares were sold in multiple trades at prices ranging from $622.41 to $623.40. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.

8. These Ordinary Shares were sold in multiple trades at prices ranging from $623.41 to $624.22. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.

9. These Ordinary Shares were sold in multiple trades at prices ranging from $625.03 to $625.97. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.

10. These Ordinary Shares were sold in multiple trades at prices ranging from $633.55 to $633.79. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.

11. These Ordinary Shares were sold in multiple trades at prices ranging from $635.59 to $636.55. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.

12. These Ordinary Shares were sold in multiple trades at prices ranging from $644.36 to $644.50. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.

Remarks:

	/s/ Louis J. Thorson, Attorney-in-Fact for William D. Mosley	11/03/2026
	** 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)