Moore Stephanie Zapata 4

What Happened
Stephanie Zapata Moore, EVP and General Counsel of Vistra Corp. (VST), was granted 79,444 restricted stock units (performance-based RSUs) on Feb 24, 2026 valued at $171.62 each (total ~$13,634,179). To cover tax withholding obligations tied to the vesting, the issuer withheld 30,416 shares (performance RSUs) and 4,264 shares (restricted RSUs) at the same price, disposing of a total of 34,680 shares for ~$5,951,782. Net shares retained from the award: 44,764 (net value ≈ $7.68M).

Key Details

• Transaction date: 2026-02-24; reported on Form 4 filed 2026-02-26 (timely filing).
• Price per share used for the award and withholding: $171.62.
• Award: 79,444 shares (code A — grant/acquisition); Withholdings: 30,416 and 4,264 shares (code F — tax withholding/disposition).
• Net shares retained after withholding: 44,764 (79,444 − 34,680).
• Footnotes:
  • F1: These were performance-based RSUs certified by the Board’s committee for the three‑year period ended Dec 31, 2025 (certified Feb 18, 2026).
  • F2/F3: Withholdings were issuer actions to cover taxes per award terms and were not within the reporting person’s control.
• Shares owned after the transaction: not specified in the filing.

Context

• This was an award/vesting event (not an open-market buy or voluntary sale). The largest disposals here are tax withholdings by the company to satisfy tax obligations at vesting, a routine administrative step rather than an intent to liquidate by the insider.
• Performance-based RSUs vesting requires committee certification of goals; the filing shows certification occurred before the vesting date.