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STX insider trading — Seagate Technology Holdings plc

Over the last 90 days, insiders at Seagate Technology Holdings plc (STX) made 0 open-market purchases worth $0 and 13 open-market sales worth $165.81M, making them net sellers by $165.81M. The largest sale was by Mosley William D (CEO), who sold 97,889 shares for $75.58M on Sep 15, 2026.

Updated Oct 16, 2026.

Insider buying · 90d
$0
Insider selling · 90d
$165.81M
Net · 90d
−$165.81M
Last 30 days
0B / 3S

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Recent STX insider transactions

Every Form 4 filed by Seagate Technology Holdings plc officers, directors and 10% owners in the last 90 days, newest first. P = open-market purchase, S = open-market sale; other codes are awards, option exercises, tax withholding or gifts.

Trade dateInsiderRoleTypeOwnershipSharesPriceValueFiling
Oct 1, 2026Mosley William DCEOM · Option exercise · 10b5-1Direct14,000$46.23$647KForm 4
Oct 1, 2026Mosley William DCEOS · Sale · 10b5-1Direct30,000$922.35$27.67MForm 4
Sep 21, 2026Morris John ChristopherEVP & CTOM · Option exercise · 10b5-1Direct915$158.40$145KForm 4
Sep 21, 2026Morris John ChristopherEVP & CTOS · Sale · 10b5-1Direct9,354$877.91$8.21MForm 4
Sep 15, 2026Teh Ban SengEVP & Chief Commercial OfficerS · Sale · 10b5-1Direct52,730$782.08$41.24MForm 4
Sep 15, 2026Morris John ChristopherEVP & CTOS · SaleDirect15,466$772.15$11.94MForm 4
Sep 15, 2026Mosley William DCEOS · SaleDirect97,889$772.14$75.58MForm 4
Sep 15, 2026Romano GianlucaEVP & CFOS · SaleDirect49,984$772.16$38.60MForm 4
Sep 14, 2026Teh Ban SengEVP & Chief Commercial OfficerM · Option exercise · 10b5-1Direct52,730——Form 4
Sep 14, 2026Chong Kian FattEVP Global OperationsM · Option exerciseDirect14,470——Form 4
Sep 14, 2026Morris John ChristopherEVP & CTOM · Option exerciseDirect30,130——Form 4
Sep 14, 2026Mosley William DCEOM · Option exerciseDirect177,000——Form 4
Sep 14, 2026Romano GianlucaEVP & CFOM · Option exerciseDirect90,380——Form 4
Sep 14, 2026Teh Ban SengEVP & Chief Commercial OfficerS · Sale · 10b5-1Direct989$779.00$770KForm 4
Sep 11, 2026Chong Kian FattEVP Global OperationsM · Option exerciseDirect678——Form 4
Sep 11, 2026Teh Ban SengEVP & Chief Commercial OfficerM · Option exercise · 10b5-1Direct989——Form 4
Sep 14, 2026Mosley William DCEOS · SaleDirect1,870$781.23$1.46MForm 4
Sep 14, 2026Romano GianlucaEVP & CFOS · Sale · 10b5-1Direct955$781.24$746KForm 4
Sep 14, 2026Morris John ChristopherEVP & CTOS · SaleDirect493$781.23$385KForm 4
Sep 11, 2026Mosley William DCEOM · Option exerciseDirect3,319——Form 4
Sep 11, 2026Romano GianlucaEVP & CFOS · Sale · 10b5-1Direct50,498$832.25$42.03MForm 4
Sep 11, 2026Romano GianlucaEVP & CFOM · Option exercise · 10b5-1Direct52,193$99.99$5.05MForm 4
Sep 11, 2026Morris John ChristopherEVP & CTOM · Option exerciseDirect942——Form 4
Sep 10, 2026Morris John ChristopherEVP & CTOS · SaleDirect572$862.13$493KForm 4
Sep 10, 2026Teh Ban SengEVP & Chief Commercial OfficerS · Sale · 10b5-1Direct663$860.09$570KForm 4
Sep 9, 2026Morris John ChristopherEVP & CTOM · Option exerciseDirect1,131——Form 4
Sep 9, 2026Chong Kian FattEVP Global OperationsM · Option exerciseDirect581——Form 4
Sep 9, 2026Teh Ban SengEVP & Chief Commercial OfficerM · Option exercise · 10b5-1Direct1,263——Form 4
Sep 10, 2026Mosley William DCEOS · SaleDirect2,849$862.13$2.46MForm 4
Sep 10, 2026Romano GianlucaEVP & CFOS · SaleDirect1,348$862.13$1.16MForm 4
Sep 9, 2026Mosley William DCEOM · Option exerciseDirect5,230——Form 4
Sep 9, 2026Romano GianlucaEVP & CFOM · Option exerciseDirect2,474——Form 4
Sep 1, 2026Mosley William DCEOM · Option exercise · 10b5-1Direct14,000$46.23$647KForm 4
Sep 1, 2026Mosley William DCEOS · Sale · 10b5-1Direct30,000$816.28$24.49MForm 4
Sep 1, 2026Conyers Yolanda LeeDirectorS · Sale · 10b5-1Direct750$815.11$611KForm 4
Aug 24, 2026Lee James CiEVP & CLOM · Option exercise · 10b5-1Direct4,032$158.40$639KForm 4
Aug 24, 2026Lee James CiEVP & CLOS · Sale · 10b5-1Direct9,013$794.84$7.16MForm 4
Aug 21, 2026Lee James CiEVP & CLOS · SaleDirect3,939$849.35$3.35MForm 4
Aug 21, 2026Teh Ban SengEVP & Chief Commercial OfficerS · Sale · 10b5-1Direct9,862$852.97$8.41MForm 4
Aug 21, 2026Morris John ChristopherEVP & CTOS · Sale · 10b5-1Direct3,516$849.35$2.99MForm 4
Aug 20, 2026Lee James CiEVP & CLOM · Option exerciseDirect8,920——Form 4
Aug 20, 2026Chong Kian FattEVP Global OperationsM · Option exerciseDirect6,846——Form 4
Aug 20, 2026Morris John ChristopherEVP & CTOM · Option exercise · 10b5-1Direct7,578$158.40$83KForm 4
Aug 20, 2026Morris John ChristopherEVP & CTOS · Sale · 10b5-1Direct523$835.54$437KForm 4
Aug 20, 2026Teh Ban SengEVP & Chief Commercial OfficerM · Option exercise · 10b5-1Direct18,189$158.40$958KForm 4
Aug 20, 2026Teh Ban SengEVP & Chief Commercial OfficerS · Sale · 10b5-1Direct6,048$842.97$5.10MForm 4
Aug 21, 2026Romano GianlucaEVP & CFOS · SaleDirect9,076$849.35$7.71MForm 4
Aug 21, 2026Mosley William DCEOS · SaleDirect18,138$849.35$15.41MForm 4
Aug 20, 2026Romano GianlucaEVP & CFOM · Option exerciseDirect16,907——Form 4
Aug 20, 2026Mosley William DCEOM · Option exerciseDirect33,789——Form 4
Aug 13, 2026Teh Ban SengEVP & Chief Commercial OfficerM · Option exerciseDirect6,002$76.43$459KForm 4
Aug 13, 2026Teh Ban SengEVP & Chief Commercial OfficerS · SaleDirect7,361$920.80$6.78MForm 4
Aug 7, 2026Romano GianlucaEVP & CFOS · Sale · 10b5-1Direct22,211$802.94$17.83MForm 4
Aug 3, 2026Morris John ChristopherEVP & CTOS · Sale · 10b5-1Direct168$817.76$137KForm 4
Aug 3, 2026Mosley William DCEOS · Sale · 10b5-1Direct30,000$817.04$24.51MForm 4
Aug 3, 2026Mosley William DCEOM · Option exercise · 10b5-1Direct14,000$46.23$647KForm 4
Jul 30, 2026Lee James CiEVP & CLOS · Sale · 10b5-1Direct694$877.45$609KForm 4
Jul 23, 2026Lee James CiEVP & CLOS · SaleDirect542$905.01$491KForm 4
Jul 22, 2026Lee James CiEVP & CLOM · Option exerciseDirect1,237——Form 4

STX insider trading FAQ

Are insiders buying STX stock?

Not on the open market. In the last 90 days, Seagate Technology Holdings plc insiders made no open-market purchases, and 13 open-market sales totaling $165.81M. Purchases with the insider's own money are generally seen as a stronger signal than sales, which happen for many reasons (taxes, diversification, planned 10b5-1 sales).

Who are the insiders trading STX?

Recent sellers: Lee James Ci, Morris John Christopher, Mosley William D, Romano Gianluca, Teh Ban Seng.

Where does STX insider trading data come from?

Every transaction comes from SEC Form 4 filings on EDGAR. Company officers, directors and 10% owners must file a Form 4 within two business days of buying or selling. InsiderBolt reads these filings directly from the SEC.

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Insider trading data is for informational purposes only and is not investment advice. Filings can be amended; always confirm details on SEC EDGAR.