William D. Mosley, CEO and Director of Seagate Technology Holdings plc, filed a Form 4 on November 3, 2026, disclosing the exercise of 14,000 NQ Options and the subsequent sale of 20,838 ordinary shares on November 2, 2026, all pursuant to a Rule 10b5-1 trading plan.

Key Highlights

  • Option exercise: Mosley exercised 14,000 NQ Options at an exercise price of $46.23 per share on November 2, 2026, acquiring 14,000 ordinary shares.
  • Shares sold: A total of 20,838 ordinary shares were sold across 27 separate transactions on November 2, 2026, at weighted average prices ranging from $587.9911 to $616.6621.
  • Remaining beneficial ownership: Following all reported transactions, Mosley directly owned 352,828.25 ordinary shares, according to the filing.
  • Remaining NQ Options: After the exercise, Mosley held 69,100 NQ Options with an expiration date of September 9, 2027, the filing disclosed.
  • 10b5-1 plan: According to the filing, all transactions were effected pursuant to a Rule 10b5-1 trading plan adopted by Mosley on February 18, 2026.
  • Issuer: Seagate Technology Holdings plc, trading on NASDAQ:STX.

Mosley's November 2 Option Exercise and Multi-Tranche Share Sales

According to the Form 4 filed with the SEC, William D. Mosley, who serves as both CEO and Director of Seagate Technology Holdings plc (NASDAQ:STX), exercised 14,000 NQ Options at $46.23 per share on November 2, 2026, acquiring 14,000 ordinary shares. That exercise brought his directly held share count to 376,108.25 ordinary shares before subsequent sales were recorded, the filing stated.

The filing reports that Mosley then sold 20,838 ordinary shares across 27 separate tranches on the same date, November 2, 2026. The weighted average sale prices for these tranches ranged from $587.9911 for the first tranche of 720 shares to $616.6621 for the final tranche of 760 shares. The filing notes that many tranches represent sales executed at multiple prices within a narrower sub-range, and that full details of individual trade prices are available upon request to the SEC staff, the issuer, or a security holder.

After all reported transactions, the filing states that Mosley directly owned 352,828.25 ordinary shares and held 69,100 NQ Options, which carry an exercise price of $46.23 and an expiration date of September 9, 2027. The filing confirms that all transactions were carried out under a Rule 10b5-1 trading plan that Mosley adopted on February 18, 2026, and the form was filed by one reporting person.

What Was Disclosed

The Form 4 discloses that Seagate CEO William D. Mosley exercised 14,000 NQ Options and sold 20,838 ordinary shares on November 2, 2026, under a pre-established 10b5-1 plan, leaving him with direct ownership of 352,828.25 ordinary shares and 69,100 remaining NQ Options.