# EDGAR Filing Document

**Accession Number:** 0001137789
**File Stem:** 0001137789-25-000222
**Filing Date:** 2025-9
**Character Count:** 8536
**Document Hash:** cc5ce213f5a155c877b58ceccb5511d3
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001137789-25-000222.hdr.sgml**: 20250911

**ACCESSION NUMBER**: 0001137789-25-000222

**CONFORMED SUBMISSION TYPE**: 4

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20250909

**FILED AS OF DATE**: 20250911

**DATE AS OF CHANGE**: 20250911

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Morris John Christopher
- **CENTRAL INDEX KEY:** 0001988271

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-31560
- **FILM NUMBER:** 251308562

**MAIL ADDRESS:**
- **STREET 1:** 1280 DISC DRIVE
- **CITY:** SHAKOPEE
- **STATE:** MN
- **ZIP:** 55379
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Seagate Technology Holdings plc
- **CENTRAL INDEX KEY:** 0001137789
- **STANDARD INDUSTRIAL CLASSIFICATION:** COMPUTER STORAGE DEVICES [3572]
- **ORGANIZATION NAME:** 06 Technology
- **EIN:** 981597419
- **FISCAL YEAR END:** 0627

**BUSINESS ADDRESS:**
- **STREET 1:** 121 WOODLANDS AVENUE 5
- **CITY:** SINGAPORE
- **STATE:** U0
- **ZIP:** 739009
- **BUSINESS PHONE:** 65 6412 5172

**MAIL ADDRESS:**
- **STREET 1:** 121 WOODLANDS AVENUE 5
- **CITY:** SINGAPORE
- **STATE:** U0
- **ZIP:** 739009

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Seagate Technology plc
- **DATE OF NAME CHANGE:** 20100706

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Seagate Technology
- **DATE OF NAME CHANGE:** 20090330

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** SEAGATE TECHNOLOGY
- **DATE OF NAME CHANGE:** 20021212

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

## FORM 4

### STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

[ ] 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**<sup>*</sup><br>Morris John Christopher<br><sub>(Last) (First) (Middle)</sub><br>SEAGATE TECHNOLOGY PLC<br>47488 KATO ROAD<br><sub>(Street)</sub><br>FREMONT, CA 94538<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2025-09-09 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director [ ] 10% Owner<br>[X] Officer (give title below) [ ] Other (specify below)<br>_EVP & CTO_ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>Seagate Technology Holdings plc [ STX ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[X] Form filed by One Reporting Person<br>[ ] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | 3. Transaction Code (V) | 3. Transaction Code (V) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | Code | V | Amount | (A) or (D) | Price | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| Ordinary Shares | 2025-09-09 |  | M |  | 1885 | A | $0 | 23590<sup>(1)(2)</sup> | D |  |
| Ordinary Shares | 2025-09-09 |  | F |  | 860 | D | $191.59 | 22730 | D |  |
| Ordinary Shares | 2025-09-09 |  | M |  | 499 | A | $0 | 23229 | D |  |
| Ordinary Shares | 2025-09-09 |  | F |  | 228 | D | $191.59 | 23001 | D |  |
| Ordinary Shares | 2025-09-09 |  | M |  | 2526 | A | $0 | 25527 | D |  |
| Ordinary Shares | 2025-09-09 |  | F |  | 1152 | D | $191.59 | 24375 | D |  |
| Ordinary Shares | 2025-09-09 |  | M |  | 560 | A | $0 | 24935 | D |  |
| Ordinary Shares | 2025-09-09 |  | F |  | 256 | D | $191.59 | 24679 | D |  |

---

## Table II - Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | 4. Transaction Code (V) | 4. Transaction Code (V) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 6. Date Exercisable and Expiration Date | 6. Date Exercisable and Expiration Date | 7. Title and Amount of Underlying Securities | 7. Title and Amount of Underlying Securities | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | Code | V | (A) | (D) | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| Restricted Share Unit | $0 | 2025-09-09 |  | M |  |  | 1885 | <sup>(3)</sup> | <sup>(3)</sup> | Ordinary Shares | 1885 | $0 | 0 | D |  |
| Restricted Share Unit | $0 | 2025-09-09 |  | M |  |  | 499 | <sup>(4)</sup> | <sup>(4)</sup> | Ordinary Shares | 499 | $0 | 1997 | D |  |
| Restricted Share Unit | $0 | 2025-09-09 |  | M |  |  | 2526 | <sup>(5)</sup> | <sup>(5)</sup> | Ordinary Shares | 2526 | $0 | 7579 | D |  |
| Restricted Share Unit | $0 | 2025-09-09 |  | M |  |  | 560 | <sup>(6)</sup> | <sup>(6)</sup> | Ordinary Shares | 560 | $0 | 0 | D |  |

---

### Footnotes:

(1) The amount of securities beneficially owned has been updated to reflect 8,676 shares held continuously by the reporting person since prior to becoming a reporting person director for the Company, but not previously reported due to an administrative oversight.

(2) Includes 168 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.

(3) 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 on September 9, 2022 and each one-year anniversary thereafter 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, 2023 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. 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.

(6) 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.

**Signature:** /s/ Louis J. Thorson, Attorney-in-Fact for John C. Morris  
**Date:** 2025-09-11

### Remarks:

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.**