Michael Ranttila - 14 Jan 2026 Form 4 Insider Report for MIDDLEFIELD BANC CORP (MBCN)

Reporting relationship: EVP/CFO
Issuer ticker: MBCN
Reported as of: 14 Jan 2026
Net transaction value: +$35,846
SEC form: 4
Accepted by SEC: 16 Jan 2026, 10:00:39 UTC
Prior SEC filing: 18 Dec 2025
Next 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 16 Jan 2026.

Key facts

This page summarizes Michael Ranttila's Form 4 filing for MIDDLEFIELD BANC CORP (MBCN).
2 reported transactions and 2 derivative rows are listed below.
Accepted by SEC: 16 Jan 2026, 10:00.

Change

Previous filing in this sequence was filed on 18 Dec 2025.
Current net transaction value: +$35,846.

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: 16 Jan 2026

Reported non-derivative transactions

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

MBCN transaction

Common Stock

Award

Transaction value: $50,956
Shares: +1,477
Change %: +8%
Price: $34.50
Shares after: 19,957
Date: 14 Jan 2026
Ownership: Direct
Footnotes: F1, F2

MBCN transaction

Common Stock

Tax liability

Transaction value: $15,111
Shares: -438
Change %: -2.2%
Price: $34.50
Shares after: 19,519
Date: 14 Jan 2026
Ownership: Direct
Footnotes: F2

MBCN holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 50
Date: 14 Jan 2026
Ownership: as Custodian for Grandson

MBCN holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 300
Date: 14 Jan 2026
Ownership: held in IRA

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

MBCN holding Derivative

Conditional Stock Award

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 3,014
Date: 14 Jan 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 3,014
Exercise price
Footnotes: F3, F5

MBCN holding Derivative

Conditional Stock Award

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 2,956
Date: 14 Jan 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 2,956
Exercise price
Footnotes: F4, F5

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

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 5 footnotes

Footnote F1

The acquisition represents the vesting of restricted stock granted to the reporting person on January 14, 2025. The shares vested on the first anniversary of the grant.

Footnote F2

Includes shares acquired under MBCN Dividend Reinvestment Plan

Footnote F3

The award represents a grant of restricted stock which vests ratably over a three-year period provided that Mr. Ranttila remains continuously employed by Middlefield as of each vesting date. Until the award vests, the award confers no right to vote, no right to dividends, and no other shareholder rights to the recipient.

Footnote F4

Footnote F5

Each restricted stock unit represents the right to receive, at settlement, one share of common stock.