Ronald Len Zimmerly Jr. holds the role of Chief Executive Officer at MIDDLEFIELD BANC CORP (MBCN). Zimmerly has reported 6 insider filings with the SEC since 2024. The most recent filing was in March 2026.
Every role Ronald Len Zimmerly Jr. 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.
MIDDLEFIELD BANC CORP (MBCN)6 filingsUpdated Aug 30, 2026
Ronald Len Zimmerly Jr. is Chief Executive Officer, Director of MIDDLEFIELD BANC CORP (MBCN). 6 SEC Form 4 filings on record going back to 2024, most recently on 2 March 2026.
Every recent SEC Form 4 transaction Ronald Len Zimmerly Jr. has reported, most recent first.
InsiderAlpha's records for Ronald Len Zimmerly Jr. go back to 2024: 6 primary Form 4 filings, an average of 2.0 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.
No other insider has filed at Ronald Len Zimmerly Jr.'s companies, so these are insiders reporting open-market trades at other companies in the same sector.
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
Ronald Len Zimmerly Jr. is a corporate insider, tracked as Chief Executive Officer, Director of MIDDLEFIELD BANC CORP (MBCN). InsiderAlpha holds 6 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
The most recent primary Form 4 on record is dated 2 March 2026, one of 6 filings going back to 2024.
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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$MBCN MIDDLEFIELD BANC CORP24.7K shares @ $35.18$868K