Seagate Technology Holdings plc (STX) Insider Trading & SEC Filings

Updated Jul 16, 2026 · Last SEC filing 2026-07-02

Seagate Technology Holdings plc (STX) has filed 22 SEC Form 4 insider transactions in the last 90 days, with the most recent on 2026-07-02. 5 Form 8-K material event filings were reported by STX in the last 90 days. 18 Form 144 notices of proposed sale were filed for STX stock. InsiderAlpha tracks every STX SEC filing — Form 4, Form 144, and 8-K — in real time, including Rule 10b5-1 plan detection.

About Seagate Technology Holdings plc (STX)

SIC classificationComputer Storage Devices (SIC 3572)
SEC CIK0001137789

90-Day SEC Filing Activity

Form 4 filings (90d)22
Form 8-K filings (90d)5
Form 144 notices (90d)18
Latest Form 4 filing2026-07-02

Recent STX Insider Transactions (Form 4)

DateInsiderRoleTransactionSharesPriceValueFiling
MOSLEY WILLIAM DCEOS — Open-market sale320$932.94$299KSEC
MOSLEY WILLIAM DCEOS — Open-market sale200$934.45$187KSEC
MOSLEY WILLIAM DCEOS — Open-market sale320$929.11$297KSEC
MOSLEY WILLIAM DCEOS — Open-market sale120$931.62$112KSEC
MOSLEY WILLIAM DCEOS — Open-market sale620$928.10$575KSEC
MOSLEY WILLIAM DCEOS — Open-market sale571$927.00$529KSEC
MOSLEY WILLIAM DCEOS — Open-market sale1.5K$919.64$1.36MSEC
MOSLEY WILLIAM DCEOS — Open-market sale770$925.03$712KSEC
MOSLEY WILLIAM DCEOS — Open-market sale1.2K$923.83$1.07MSEC
MOSLEY WILLIAM DCEOS — Open-market sale280$930.10$260KSEC
MOSLEY WILLIAM DCEOS — Open-market sale720$922.68$664KSEC
MOSLEY WILLIAM DCEOS — Open-market sale1.0K$926.17$944KSEC
MOSLEY WILLIAM DCEOS — Open-market sale880$921.80$811KSEC
MOSLEY WILLIAM DCEOS — Open-market sale880$920.57$810KSEC
MOSLEY WILLIAM DCEOS — Open-market sale3$936.36$3KSEC

All transactions sourced from SEC EDGAR Form 4 filings for Seagate Technology Holdings plc (STX). Updated in real time as new filings are submitted to the SEC.

Most-Active STX Insiders — Last 90 Days

InsiderForm 4 filingsTotal transaction value
MOSLEY WILLIAM D65$48.47M
Teh Ban Seng37$14.71M
Morris John Christopher24$5.83M
Romano Gianluca10$3.37M
Chong Kian Fatt6—

Recent STX Form 8-K Material Events

Recent STX Form 144 Notices of Proposed Sale

Form 144 must be filed before insiders sell restricted or control stock above SEC thresholds. A cluster of Form 144 notices often precedes a wave of insider distribution.

Recent Insider Filings

Form 4 Transaction Code Reference

SEC Form 4 transactions are reported with a one-letter code indicating the type of transaction. Common codes you'll see in STX insider filings:

POpen-market purchase by the insider
SOpen-market sale by the insider
AGrant, award, or other acquisition from the issuer
MExercise or conversion of derivative security (e.g. options)
FPayment of exercise price or tax liability via share withholding
GBona-fide gift of securities
DDisposition to the issuer (e.g. share buyback participation)
JOther acquisition or disposition
XExercise of in-the-money or at-the-money derivative security
CConversion of derivative security
VTransaction voluntarily reported earlier than required

STX Insider Trading — FAQ

What is the latest insider trade for STX?
Seagate Technology Holdings plc (STX) had 22 insider filings in the last 90 days, with the most recent on 2026-07-02. InsiderAlpha tracks every Form 4, 10-K, 10-Q, and 8-K filing in real time.
How many insiders are buying STX stock?
0 insider purchases of STX were filed in the last 90 days.
How many insiders are selling STX stock?
0 insider sales of STX were filed in the last 90 days.
Where can I see STX SEC filings (Form 4, 10-K, 10-Q, 8-K)?
InsiderAlpha aggregates every STX SEC filing — Form 4 insider transactions, 10-K and 10-Q quarterly reports, and 8-K material event disclosures — in one timeline.

Related Companies — Recent Insider Activity

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