Seagate Technology CEO Files Form 144 for Routine Sell-to-Cover Tax Obligations

Form 144 Filing Analysis: Seagate Technology Holdings plc

Executive Summary

• Filer: William D. Mosley, Officer and Director
• Issuer: Seagate Technology Holdings plc (STX)
• Proposed Sale Volume: 102,784 shares of Common Stock
• Aggregate Value: ~$79.36M ($772.14 per share estimated)
• Broker: Morgan Stanley
• Filing Date: September 15, 2026

Nature of the Transaction

• Acquisition Context: The filer acquired 177,000 shares on September 14, 2026, through Performance Share Unit (PSU) vesting as compensation for services.
• Mandated Tax Withholding: As stated in the remarks, the proposed sale of 102,784 shares is an issuer-mandated sell-to-cover transaction solely intended to satisfy tax withholding obligations triggered by the PSU vesting.

Market Significance

• Significance Level: Low
• While the headline dollar amount is substantial (~$79.36M), this is an automatic, non-discretionary sell-to-cover disposition to satisfy statutory tax obligations rather than an open-market discretionary divestment.