Summary
Updated Aug 30, 2026
Margaret Montemayor is SVP, Chief Accounting Officer of Vistra Corp. (VST). 5 SEC Form 4 filings on record going back to 2024, most recently on 4 June 2026. Most recent open-market trade: sold $736K of VST on 4 June 2026. Lifetime open-market sales: $1.56M.
Recent Transactions
6Every recent SEC Form 4 transaction Margaret Montemayor has reported, most recent first.
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies Margaret Montemayor files at. Multiple unrelated insiders buying the same stock within a short window, cluster buying, has historically been one of the strongest Form 4 signals.
- James A. Burke - $156.81M of VST open-market activity in the last 12 months
- Carrie Lee Kirby - $10.18M of VST open-market activity in the last 12 months
- Scott A. Hudson - $9.46M of VST open-market activity in the last 12 months
- Scott B. Helm - $4.00M of VST open-market activity in the last 12 months
- Stephanie Zapata Moore - $3.03M of VST open-market activity in the last 12 months
- Arcilia Acosta - $2.51M of VST open-market activity in the last 12 months
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
Frequently Asked Questions
Who is Margaret Montemayor?
Margaret Montemayor is a corporate insider, tracked as SVP, Chief Accounting Officer of Vistra Corp. (VST). InsiderAlpha holds 5 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
How many SEC Form 4 filings has Margaret Montemayor submitted recently?
1 primary Form 4 filing in the last 90 days, covering 1 company.
Has Margaret Montemayor been buying or selling stock?
Recorded transactions: 0 open-market purchases and 2 open-market sales ($1.56M) across all tracked filings.
Where can I see all of Margaret Montemayor's SEC filings?
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
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