Seagate Technology Officer John C. Morris Files Form 144 to Sell $12.75M in Stock

Overview of the Filing

On September 21, 2026, John Christopher Morris, an Officer of Seagate Technology Holdings plc (STX), filed a Form 144 with the SEC indicating an intention to sell 14,849 shares of Common Stock with an estimated aggregate market value of $12,752,172.71 (~$858.79 per share).

Transaction & Acquisition Details

• Broker: Morgan Stanley Smith Barney LLC Executive Financial Services
• Approximate Date of Sale: September 21, 2026
• Source of Shares to Be Sold:
  • 2,744 shares: Acquired via Stock Option Exercise on 09/21/2026 (Cash payment).
  • 3,138 shares: Acquired via Restricted Stock Units (RSUs) vesting on 09/09/2025.
  • 8,967 shares: Acquired via Performance Stock Units (PSUs) vesting on 09/14/2025.
• Trading Plan: The proposed sale is executed pursuant to a pre-arranged Rule 10b5-1 trading plan adopted on January 29, 2026.

Past 3 Months Selling Activity

Mr. Morris has engaged in several sales over the prior three months totaling 20,735 shares for gross proceeds of approximately $16.38M:

• 09/15/2026: 15,465 shares sold for $11,941,318.31
• 09/14/2026: 492 shares sold for $384,366.39
• 09/10/2026: 572 shares sold for $493,139.01
• 08/21/2026: 3,515 shares sold for $2,985,482.12
• 08/20/2026: 523 shares sold for $436,987.42
• 08/03/2026: 168 shares sold for $137,383.68

Market & Trading Significance

The overall trading significance is rated as Medium. While the transaction value is substantial at ~$12.75M, the sales are conducted pursuant to an established Rule 10b5-1 trading plan adopted in January 2026, mitigating concerns regarding opportunistic timing or non-public information.