Summary
Updated Aug 31, 2026
Robert B. Kaminski files SEC Form 4 reports at MERCANTILE BANK CORP (MBWM). 8 SEC Form 4 filings on record going back to 2024, most recently on 2 May 2025. Most recent open-market trade: sold $11K of MBWM on 2 May 2025. Lifetime open-market sales: $553K.
Recent Transactions
9Every recent SEC Form 4 transaction Robert B. Kaminski has reported, most recent first.
Trading Pattern
InsiderAlpha's records for Robert B. Kaminski go back to 2024: 8 primary Form 4 filings, an average of 2.7 per year. 3 recorded transactions carry a Rule 10b5-1 flag, meaning they were pre-scheduled under a written trading plan rather than discretionary.
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies Robert B. Kaminski 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.
- Michael H. Price - $210K of MBWM open-market activity in the last 12 months
- Nelson F. Sanchez - $44K of MBWM 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 Robert B. Kaminski?
Robert B. Kaminski is a corporate insider of MERCANTILE BANK CORP (MBWM). InsiderAlpha holds 8 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
When did Robert B. Kaminski last file a Form 4?
The most recent primary Form 4 on record is dated 2 May 2025, one of 8 filings going back to 2024.
Has Robert B. Kaminski been buying or selling stock?
Recorded transactions: 0 open-market purchases and 7 open-market sales ($553K) across all tracked filings.
Where can I see all of Robert B. Kaminski'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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