Carolyn J. Turk - 23 Feb 2026 Form 4 Insider Report for MIDDLEFIELD BANC CORP (MBCN)

Role: Director
Signature: /s/ Carolyn J. Turk by Julie E. Shaw Power of Attorney
Issuer symbol: MBCN
Transactions as of: 23 Feb 2026
Net transactions value: +$14,248
Form type: 4
Filing time: 25 Feb 2026, 16:28:09 UTC
Previous filing: 01 Jul 2025
Next filing: 02 Mar 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
TURK CAROLYN J	Director	15985 EAST HIGH STREET, MIDDLEFIELD	/s/ Carolyn J. Turk by Julie E. Shaw Power of Attorney	25 Feb 2026	0001286841

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	MBCN	Common Stock	Award	$14,248	+405	+1.3%	$35.18	32,560	23 Feb 2026	Direct	F1

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

Explanation of Responses:

Id	Content
F1	The shares represent accelerated vesting of restricted stock units (RSUs) granted on June 27, 2025. On February 23, 2026, the Compensation Committee of Middlefield's Board of Directors approved the full vesting of all outstanding plan share awards, including the RSUs. For further information regarding the acceleration of the RSUs, please see the Form 8-K Current Report filed by Middlefield with the SEC on February 25, 2026.

Content

The shares represent accelerated vesting of restricted stock units (RSUs) granted on June 27, 2025. On February 23, 2026, the Compensation Committee of Middlefield's Board of Directors approved the full vesting of all outstanding plan share awards, including the RSUs. For further information regarding the acceleration of the RSUs, please see the Form 8-K Current Report filed by Middlefield with the SEC on February 25, 2026.