MOSLEY WILLIAM D 4

What Happened

• William D. Mosley, CEO and Director of Seagate Technology Holdings plc (STX), had 3,319 restricted share units (RSUs) convert to common shares on 2026-03-11 (reported 2026-03-12). The conversion is reported as an exercise/conversion of a derivative (code M).
• To satisfy tax withholding (code F), 1,658 of those shares were withheld at an effective price of $385.97 per share for a tax withholding value of $639,938. After withholding, Mosley received 1,661 shares net. This was a vesting/issuance event rather than an open-market purchase or sale.

Key Details

• Transaction date: 2026-03-11; Filing date: 2026-03-12 (timely).
• Conversion: 3,319 shares issued upon RSU vesting (M); Tax withholding: 1,658 shares withheld (F) at $385.97/share = $639,938.
• Net shares delivered to insider: 1,661 (3,319 issued minus 1,658 withheld).
• Shares owned after the transaction: not specified in the filing excerpt.
• Footnote: The award stems from an RSU grant under the 2022 Equity Incentive Plan; vesting schedule is four years (one-quarter began 9/11/2024, then quarterly over three years).

Context

• This was a routine RSU vesting and tax-withholding (common form of "cashless" settlement). No open-market sale or purchase was reported, and the withholding does not necessarily indicate a change in insider sentiment.