Moore Stephanie Zapata 4

What Happened Stephanie Zapata Moore, Executive Vice President and General Counsel of Vistra Corp. (VST), was granted 5,356 restricted stock units (RSUs) on 2026-03-05 (acquisition price $0.00). To cover tax withholding on the vesting, 1,963 shares were withheld by the company at $167.40 per share, generating proceeds of $328,606 (reported as a disposition for tax withholding).

Key Details

• Transaction date: March 5, 2026 (filed on March 9, 2026).
• Award: 5,356 RSUs granted (code A; acquisition price $0.00).
• Tax withholding: 1,963 shares withheld (code F) at $167.40 = $328,606.
• Approval: Grant approved by Vistra’s Social Responsibility and Compensation Committee on Feb 18, 2026 (footnote F1).
• Withholding note: The share withholding to satisfy tax liability was determined by the RSU award terms (footnote F2).
• Shares owned after the transaction: not disclosed in the filing.

Context This was an equity award (RSU vesting) with routine company withholding to cover taxes — not an open-market sale or purchase. Withholding of shares for taxes is common and does not necessarily indicate the insider’s view on the stock. The Form 4 was filed on March 9, 2026, which corresponds to the standard filing window following the March 5 transaction.