Summary
Updated Aug 31, 2026
Michael Spillane files SEC Form 4 reports at BOSTON BEER CO INC (SAM). 1 SEC Form 4 filing on record, dated 4 November 2025. Most recent open-market trade: sold $406K of SAM on 4 November 2025. Lifetime open-market sales: $642K.
Recent Transactions
2Every recent SEC Form 4 transaction Michael Spillane has reported, most recent first.
Trading Pattern
InsiderAlpha's records for Michael Spillane go back to 2025: 1 primary Form 4 filing, an average of 0.5 per year. 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.
Other Insiders Active in the Same Stocks
Insiders who have reported open-market trades at the same companies as Michael Spillane. Multiple unrelated insiders buying the same stock within a short window, cluster buying, has historically been one of the strongest Form 4 signals.
- Annette N. Fritsch - $132K of SAM open-market activity on record
- Carolyn L. O'Boyle - $56K of SAM open-market activity on record
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
Frequently Asked Questions
Who is Michael Spillane?
Michael Spillane is a corporate insider of BOSTON BEER CO INC (SAM). InsiderAlpha holds 1 primary Form 4 filing for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
When did Michael Spillane last file a Form 4?
The only primary Form 4 on record is dated 4 November 2025.
Has Michael Spillane been buying or selling stock?
Recorded transactions: 0 open-market purchases and 2 open-market sales ($642K) across all tracked filings.
Where can I see all of Michael Spillane'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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