Margaret Montemayor

Margaret Montemayor: SVP, Chief Accounting Officer at Vistra. What Margaret Montemayor holds in an AI or semiconductor company tracked on Silicon Floor, from their SEC filings, broken down: the shares held and how, then any restricted shares, options or other rights declared.

Vistra (VST)

Margaret Montemayor holds 9,760 Vistra shares (0.00% of the company), worth about $1.5M at the last price, according to the Form 4 of Jun 2, 2026.

• Shares held: 9,760 (0.00%), $1.5M — Held in their own name.

Declarations

• Vistra (VST) — Form 4 of Jun 2, 2026 (SVP, Chief Accounting Officer): open-market sale of 4,600 at $160.00; 9,760 shares after 0001602114-26-000006
• Vistra (VST) — Form 4 of May 27, 2026 (SVP, Chief Accounting Officer): open-market sale of 5,000 at $164.96; 14,360 shares after 0001602114-26-000004
• Vistra (VST) — Form 4 of Mar 5, 2026 (SVP, Chief Accounting Officer): grant or award of 1,989; shares withheld for tax of 561 at $167.40; 19,360 shares after 0001602114-26-000002
• Vistra (VST) — Form 4 of Nov 13, 2025 (SVP, Chief Accountant): shares withheld for tax of 1,472 at $171.56; 17,932 shares after 0001602114-25-000003
• Vistra (VST) — Form 4 of Mar 5, 2025 (SVP, Chief Accountant): grant or award of 2,140; shares withheld for tax of 394 at $126.87; 19,404 shares after 0001692819-25-000018
• Vistra (VST) — Form 4 of Nov 13, 2024 (SVP, Chief Accountant): shares withheld for tax of 1,177 at $142.12; 17,658 shares after 0001692819-24-000071

Sources: SEC Schedules 13D and 13G (stakes above 5%, which count everything a person votes or can acquire within 60 days) and Forms 3, 4 and 5 (the shares a director, officer or 10% owner holds, filed within two business days of each trade). Values at the last price.

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