Summary
Updated Aug 31, 2026
Michael Ranttila is EVP/CFO of MIDDLEFIELD BANC CORP (MBCN). 4 SEC Form 4 filings on record going back to 2025, most recently on 2 March 2026.
Recent Transactions
11Every recent SEC Form 4 transaction Michael Ranttila has reported, most recent first.
Trading Pattern
InsiderAlpha's records for Michael Ranttila go back to 2025: 4 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.
Other Insiders Active in the Same Sector
No other insider has filed at Michael Ranttila's companies, so these are insiders reporting open-market trades at other companies in the same sector.
- Ishbia Mat - $490.27M of UWMC open-market activity in the last 12 months
- V3 Holding Ltd - $430.08M of CIFR open-market activity in the last 12 months
- DST Global Advisors Ltd - $416.93M of CHYM open-market activity in the last 12 months
- WARBURG PINCUS LLC - $414.97M of BANC open-market activity in the last 12 months
- Baiju Bhatt - $359.60M of HOOD open-market activity in the last 12 months
- Brian M. Baldwin - $320.61M of JHG 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 Michael Ranttila?
Michael Ranttila is a corporate insider, tracked as EVP/CFO of MIDDLEFIELD BANC CORP (MBCN). InsiderAlpha holds 4 primary Form 4 filings for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
When did Michael Ranttila last file a Form 4?
The most recent primary Form 4 on record is dated 2 March 2026, one of 4 filings going back to 2025.
Where can I see all of Michael Ranttila'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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