Summary
Latest filing:
Gregg Winiarski files SEC Form 4 reports at Strategy Inc (MSTR). 4 SEC Form 4 filings on record going back to 2025, most recently on 2 June 2026. Most recent open-market trade: bought $977K of MSTR on 12 August 2025. Lifetime open-market purchases: $977K.
Recent Transactions
3Every recent SEC Form 4 transaction Gregg Winiarski 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 Gregg Winiarski 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.
- Wei-Ming Shao - $20.74M of MSTR open-market activity in the last 12 months
- Phong le - $13.80M of MSTR open-market activity in the last 12 months
- Jarrod M. Patten - $12.99M of MSTR open-market activity in the last 12 months
- Andrew Kang - $5.55M of MSTR open-market activity in the last 12 months
- Carl J. Rickertsen - $779K of MSTR open-market activity in the last 12 months
- Jane A. Dietze - $204K of MSTR 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 Gregg Winiarski?
Gregg Winiarski is a corporate insider of Strategy Inc (MSTR). InsiderAlpha holds 4 primary Form 4 filings for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
When did Gregg Winiarski last file a Form 4?
The most recent primary Form 4 on record is dated 2 June 2026, one of 4 filings going back to 2025.
Has Gregg Winiarski been buying or selling stock?
Recorded transactions: 1 open-market purchase ($977K) and 0 open-market sales across all tracked filings.
Where can I see all of Gregg Winiarski'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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