MICHAEL RANTTILA - 06 Aug 2025 Form 4 Insider Report for MIDDLEFIELD BANC CORP (MBCN)

Role: EVP/CFO
Signature: /s/ Michael C. Ranttila by Julie E. Shaw Power of Attorney
Issuer symbol: MBCN
Transactions as of: 06 Aug 2025
Net transactions value: +$28,953
Form type: 4
Filing time: 07 Aug 2025, 18:49:22 UTC
Previous filing: 03 Mar 2025
Next filing: 18 Dec 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
RANTTILA MICHAEL	EVP/CFO	15985 EAST HIGH STREET, MIDDLEFIELD	/s/ Michael C. Ranttila by Julie E. Shaw Power of Attorney	07 Aug 2025	0001792684

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	MBCN	Common Stock	Award	$40,828	+1,506	+30%	$27.11	6,609	06 Aug 2025	Direct	F1, F2
transaction	MBCN	Common Stock	Tax liability	$11,874	-438	-6.6%	$27.11	6,171	06 Aug 2025	Direct	F2
holding	MBCN	Common Stock						50	06 Aug 2025	as Custodian for Grandson
holding	MBCN	Common Stock						300	06 Aug 2025	held in IRA

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
holding	MBCN	Conditional Stock Award						3,014	06 Aug 2025	Common Stock	3,014		Direct	F3, F6
holding	MBCN	Conditional Stock Award						2,846	06 Aug 2025	Common Stock	2,846	$27.40	Direct	F4
holding	MBCN	Conditional Stock Award						4,433	06 Aug 2025	Common Stock	4,433		Direct	F5, F6

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
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	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.
F4	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.
F5	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. The details of the vesting conditions may be found in a Form 8-K filing dated January 17, 2025.
F6	Each restricted stock unit represents the right to receive, at settlement, one share of common stock.