Michael Ranttila - 02 Mar 2026 Form 4 Insider Report for MIDDLEFIELD BANC CORP (MBCN)

Reporting relationship: EVP/CFO
Issuer ticker: MBCN
Reported as of: 02 Mar 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 02 Mar 2026, 07:07:55 UTC
Prior SEC filing: 25 Feb 2026
Source filing: View source filing
Reporting owner signature: /s/ Michael C. Ranttila by Julie E. Shaw Power of Attorney

Key filing fact

Michael Ranttila filed Form 4 for MIDDLEFIELD BANC CORP (MBCN) on 02 Mar 2026.

Key facts

This page summarizes Michael Ranttila's Form 4 filing for MIDDLEFIELD BANC CORP (MBCN).
3 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 02 Mar 2026, 07:07.

Change

Previous filing in this sequence was filed on 25 Feb 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001792684 Primary reporting owner

RANTTILA MICHAEL

Relationship: EVP/CFO
Address: 15985 EAST HIGH STREET, MIDDLEFIELD
Signature: /s/ Michael C. Ranttila by Julie E. Shaw Power of Attorney
Signature date: 02 Mar 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

MBCN transaction

Common Stock

Disposed to Issuer

Transaction value
Shares: -50
Change %: -100%
Price
Shares after: 0
Date: 02 Mar 2026
Ownership: as Custodian for Grandson
Footnotes: F1

MBCN transaction

Common Stock

Disposed to Issuer

Transaction value
Shares: -300
Change %: -100%
Price
Shares after: 0
Date: 02 Mar 2026
Ownership: held in IRA
Footnotes: F1

MBCN transaction

Common Stock

Disposed to Issuer

Transaction value
Shares: -32,867
Change %: -100%
Price
Shares after: 0
Date: 02 Mar 2026
Ownership: Direct
Footnotes: F1

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Section 16 status

Michael Ranttila is no longer subject to Section 16 filing requirements. Form 4 or Form 5 obligations may still apply in specific circumstances.

Explanation of responses 1 footnote

Footnote F1

Disposed of pursuant to the Agreement and Plan of Merger, dated October 22, 2025 (the "Agreement"), by and between Middlefield Banc Corp. ("Middlefield") and Farmers National Banc Corp. ("Farmers"), pursuant when Middlefield merged with and into Farmers on March 2, 2026.