Margaret Montemayor has sold stock and made no open-market buys since Mar 2016

Margaret Montemayor is a Senior Vice President, Chief Accounting Officer, and Controller at Vistra Corp. (NYSE: VST), where she oversees the company’s accounting, financial reporting, and related compliance functions.( She assumed her current role in November 2023 and also serves as an executive signatory on Vistra’s filings under the Securities Exchange Act of 1934.( As a corporate insider, she has recently reported transactions in Vistra stock, including the sale of 5,000 shares on May 27, 2026, in her capacity as SVP and Chief Accounting Officer.(

Montemayor has more than two decades of professional accounting and financial reporting experience across public accounting and the energy sector.( She began her career as a Senior Associate at Arthur Andersen (2000–2002), then joined PricewaterhouseCoopers as a Senior Associate in Assurance before progressing to Manager roles in the firm’s Global Capital Markets Group in Zurich and its Transaction Services – Accounting and Financial Reporting Group (2002–2010).( She subsequently spent over a decade at Pioneer Natural Resources Company, rising to Vice President and Chief Accounting Officer (2010–2022).( Montemayor holds both a Bachelor’s and Master’s degree in Accounting from St. Mary’s University (1995–2000).(

Written by Perplexity from public sources.