Courtney M. Erminio - 14 Jan 2026 Form 4 Insider Report for MIDDLEFIELD BANC CORP (MBCN)

Reporting relationship: EVP/Chief Risk Officer
Issuer ticker: MBCN
Reported as of: 14 Jan 2026
Net transaction value: +$21,562
SEC form: 4
Accepted by SEC: 16 Jan 2026, 09:36:35 UTC
Prior SEC filing: 18 Dec 2025
Next SEC filing: 25 Feb 2026
Source filing: View source filing
Reporting owner signature: /s/ Courtney M. Erminio by Julie E. Shaw Power of Attorney

Key filing fact

Courtney M. Erminio filed Form 4 for MIDDLEFIELD BANC CORP (MBCN) on 16 Jan 2026.

Key facts

This page summarizes Courtney M. Erminio'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, 09:36.

Change

Previous filing in this sequence was filed on 18 Dec 2025.
Current net transaction value: +$21,562.

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 0001698885 Primary reporting owner

Erminio Courtney M

Relationship: EVP/Chief Risk Officer
Address: 15985 EAST HIGH STREET, MIDDLEFIELD
Signature: /s/ Courtney M. Erminio 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: $32,499
Shares: +942
Change %: +13%
Price: $34.50
Shares after: 8,416
Date: 14 Jan 2026
Ownership: Direct
Footnotes: F1, F2

MBCN transaction

Common Stock

Tax liability

Transaction value: $10,936
Shares: -317
Change %: -3.8%
Price: $34.50
Shares after: 8,099
Date: 14 Jan 2026
Ownership: Direct
Footnotes: F2

MBCN holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 151
Date: 14 Jan 2026
Ownership: Direct
Footnotes: F2, F3

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: 1,708
Date: 14 Jan 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 1,708
Exercise price
Footnotes: F4, F6

MBCN holding Derivative

Conditional Stock Award

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 1,886
Date: 14 Jan 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 1,886
Exercise price
Footnotes: F5, F6

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

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 6 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

Includes shares held jointly with spouse.

Footnote F4

The award represents a grant of restricted stock which vests ratably over a three-year period provided that Mrs. Erminio 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. The details of the vesting conditions may be found in a Form 8-K dated September 4, 2024.

Footnote F5

The award represents a grant of restricted stock which vests ratably over a three-year period provided that Mrs. Erminio 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. the details of the vesting conditions may be found in a Form 8-K dated January 17, 2025.

Footnote F6

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