Ronald Len Zimmerly Jr. - 06 Aug 2025 Form 4 Insider Report for MIDDLEFIELD BANC CORP (MBCN)

Role: Chief Executive Officer, Director
Signature: /s/ Ronald L. Zimmerly, Jr. by Julie E. Shaw Power of Attorney
Issuer symbol: MBCN
Transactions as of: 06 Aug 2025
Net transactions value: +$43,295
Form type: 4
Filing time: 07 Aug 2025, 20:24:29 UTC
Previous filing: 24 Jan 2025
Next filing: 03 Dec 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Zimmerly Ronald Len Jr.	Chief Executive Officer, Director	15985 EAST HIGH STREET, MIDDLEFIELD	/s/ Ronald L. Zimmerly, Jr. by Julie E. Shaw Power of Attorney	07 Aug 2025	0001954793

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	MBCN	Common Stock	Award	$61,269	+2,260	+6.6%	$27.11	36,503	06 Aug 2025	Direct	F1, F2
transaction	MBCN	Common Stock	Tax liability	$17,974	-663	-1.8%	$27.11	35,840	06 Aug 2025	Direct	F2
holding	MBCN	Common Stock						8,786	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
transaction	MBCN	Conditional Stock Award	Award		+6,864			6,864	14 Jan 2025	Common Stock	6,864		Direct	F4, F7
holding	MBCN	Conditional Stock Award						4,520	06 Aug 2025	Common Stock	4,520		Direct	F3, F4
holding	MBCN	Conditional Stock Award						3,722	06 Aug 2025	Common Stock	3,722	$27.40	Direct	F5
holding	MBCN	Conditional Stock Award						3,788	06 Aug 2025	Common Stock	3,788	$28.60	Direct	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. Zimmerly 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 8K filing dated September 4, 2024.
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 Mr. Zimmerly 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.
F7	The award represents a grant of restricted stock which vests ratably over a three-year period provided that Mr. Zimmerly 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 8K filing dated January 17, 2025.