Hugh Yoon J. 4

What Happened
Hugh Yoon, SVP & Corporate Controller of Mattel (MAT), had 4,417 restricted stock units (RSUs) vest on May 7, 2026, resulting in the issuance/conversion of 4,417 shares. Per the grant terms, 1,585 of those shares were automatically withheld to cover required tax withholding at $15.00 per share (total withheld = $23,775). The RSUs were part of a May 7, 2025 grant of 13,387 RSUs that vest 33%/33%/34% over three years; the 4,417 shares represent the first 33% tranche.

Key Details

• Transaction date: May 7, 2026; Form 4 filed May 11, 2026 (filed within the standard two-business-day window).
• Vesting/Conversion: 4,417 RSUs converted to 4,417 shares (derivative code M).
• Tax withholding: 1,585 shares withheld (code F) at $15.00/share = $23,775.
• Net shares delivered to Yoon: 4,417 − 1,585 = 2,832 shares (filing does not state post-transaction total beneficial ownership).
• Footnotes: The shares derive from the May 7, 2025 RSU grant (13,387 units; 33% vested on first anniversary). Withholding was automatic per grant terms.

Context
This was a routine RSU vesting and not an open-market buy or voluntary sale. The filing shows conversion of RSUs into shares with automatic share withholding to satisfy tax obligations (common practice). No 10b5-1 plan, gift, or sale was reported; the transaction reflects compensation vesting rather than an indicator of buy/sell sentiment.