Seagate Insider Mosley Files Form 4 on Ownership Change

TL;DR

**Seagate insider Mosley filed a Form 4, signaling a change in his holdings.**

AI Summary

William D. Mosley, a reporting insider for Seagate Technology Holdings plc, filed a Form 4 on March 23, 2026, indicating a change in beneficial ownership of securities as of March 19, 2026. This filing, while not detailing specific transactions, signals that an insider's holdings have changed, which can be a key indicator for investors. For shareholders, understanding these changes helps gauge insider confidence and potential future stock performance, as insiders often have unique insights into the company's health.

Why It Matters

Insider transaction filings like this Form 4 can signal management's confidence (or lack thereof) in the company's future, influencing investor sentiment and stock price.

Risk Assessment

Risk Level: low — This filing is purely informational and does not inherently pose a direct risk, but rather provides data for investor analysis.

Analyst Insight

Investors should look for the detailed transaction information within the full Form 4 document to understand the nature (buy/sell) and size of William D. Mosley's change in beneficial ownership, as this will provide more actionable insight into insider sentiment.

Key Players & Entities

• MOSLEY WILLIAM D (person) — Reporting insider
• Seagate Technology Holdings plc (company) — Issuer of securities
• 0001388390 (person) — CIK of William D. Mosley
• 0001137789 (company) — CIK of Seagate Technology Holdings plc

FAQ

Key Financial Figures

• $10,000,000 — ith an aggregate value of approximately $10,000,000. Remarks: /s/ Louis J. Thorson, Atto

Filing Documents

• wk-form4_1774297204.html (4)
• wk-form4_1774297204.xml (4) — 4KB
• 0001137789-26-000074.txt ( ) — 5KB

From the Filing

SEC FORM 4 SEC Form 4 FORM 4 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 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).    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) 03/19/2026 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 03/19/2026 S (1) 24,584 D $ 406.77 (1) 375,591 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. The reported transaction reflects the contribution of issuer securities to an exchange fund in exchange for interest in the exchange fund. For purposes of Section 16, the transaction is being reported as a sale. The value of the securities contributed, and the corresponding interest received, was determined based on closing stock price of the issuer's common stock on March 18, 2026, with an aggregate value of approximately $10,000,000. Remarks: /s/ Louis J. Thorson, Attorney-in-Fact for William D. Mosley 03/23/2026 ** 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)

View Full Filing

View this 4 filing on SEC EDGAR