MIDDLEFIELD BANC CORP — Director's Dealing 2025

Aug 7, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: MIDDLEFIELD BANC CORP (MBCN)
CIK: 0000836147
Period of Report: 2025-08-06

Reporting Person: Erminio Courtney M (EVP/Chief Risk Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-08-06	Common Stock	A	853	$27.11	Acquired	4678.991	Direct
2025-08-06	Common Stock	F	242	$27.11	Disposed	4436.991	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	150.525	Direct

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Conditional Stock Award	$27.4000	2026-03-10	Common Stock (1628)	1628	Direct
Conditional Stock Award	$	2027-09-06	Common Stock (1708)	1708	Direct
Conditional Stock Award	$	2028-01-14	Common Stock (2828)	2828	Direct

Footnotes

F1: The acquisition represents the vesting of restricted stock granted to the reporting person on August 6, 2024. The shares vested on the first anniversary of the grant date.

F2: Includes shares acquired under MBCN Dividend Reinvestment Plan

F3: Includes shares held jointly with spouse.

F4: Each restricted stock unit represents the right to receive, at settlement, one share of common stock.

F5: Until the award vests, the award confers no right to vote, no right to dividends, and no other shareholder rights to the recipient. Vesting is subject to a time-based or service condition and a performance-based condition. The details of the vesting conditions may be found in a Form 8K filing dated March 17, 2023.

F6: 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.

F7: 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.