Gregg Winiarski - SEC Form 4 Insider Trading Activity
Summary
Updated Aug 4, 2026
Gregg Winiarski has filed 1 SEC Form 4 filing across 1 company in the last 90 days - buying. Lifetime open-market purchases: $977K.
Profile
Gregg Winiarski is a corporate insider at Strategy Inc (MSTR). Winiarski has reported 5 insider filings with the SEC since 2025. The most recent filing was in June 2026.
| Role | Insider |
|---|---|
| Notability | 20/100 |
Board memberships
- Strategy Inc
Trading Pattern
InsiderAlpha's records for Gregg Winiarski go back to 2025: 4 primary Form 4 filings, an average of 2.0 per year. The typical open-market purchase is $977K (1 buy totaling $977K). The largest single buy on record is $977K of MSTR in 2025. No transaction on record carries a Rule 10b5-1 flag - the filings look discretionary rather than pre-scheduled, which makes their timing more informative as a signal.
Career & Filing History
Every role Gregg Winiarski has reported on a Form 4, reconstructed from the filings themselves - reporting insiders must state their relationship to the issuer (officer title, director seat, or 10% ownership) on every filing.
- Insider at Strategy Inc (MSTR) - 4 filings, 2025 to 2026
Recent Transactions
| Date | Ticker | Company | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-06-02 | MSTR | Strategy Inc | M - Option exercise | 406 | - | |
| 2025-12-23 | MSTR | Strategy Inc | M - Option exercise | 686 | - | |
| 2025-08-12 | MSTR | Strategy Inc | P - Open-market purchase | 10.0K | $97.65 | $977K |
Companies - Last 90 Days
- Strategy Inc (MSTR) - 1 filing, last 2026-06-02
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades at the companies Gregg Winiarski has recently filed 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 - $21.95M of MSTR open-market activity in the last 12 months
- Andrew Kang - $15.37M of MSTR open-market activity in the last 12 months
- Phong le - $13.82M of MSTR open-market activity in the last 12 months
- Jarrod M. Patten - $11.90M 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:
- Michael Sean Griffey
- GS FUND HOLDINGS, L.L.C.
- Steve Handy
- Hanwha Aerospace Co., Ltd.
- Stayce D. Harris
- Harrison Street Real Assets Fund LLC
- Haveli Investments, L.P.
- Stephen J. Hemsley
Frequently Asked Questions
Who is Gregg Winiarski?
Gregg Winiarski is a corporate insider at Strategy Inc (MSTR). Winiarski has reported 5 insider filings with the SEC since 2025. The most recent filing was in June 2026.…
How many SEC Form 4 filings has Gregg Winiarski submitted recently?
1 primary Form 4 filing in the last 90 days, covering 1 company.
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.
Learn More
Open the live Gregg Winiarski profile on InsiderAlpha for real-time alerts, AI-scored trade ideas, and full transaction history.