JAMES J. MCCASKEY - 02 Mar 2026 Form 4 Insider Report for MIDDLEFIELD BANC CORP (MBCN)

Role: Director
Signature: /s/ James J. McCaskey by Julie E. Shaw Power of Attorney
Issuer symbol: MBCN
Transactions as of: 02 Mar 2026
Net transactions value: $0
Form type: 4
Filing time: 02 Mar 2026, 07:09:24 UTC
Previous filing: 25 Feb 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
MCCASKEY JAMES J	Director	15985 EAST HIGH STREET, MIDDLEFIELD	/s/ James J. McCaskey by Julie E. Shaw Power of Attorney	02 Mar 2026	0001286842

Transactions Table

Type	Sym	Class	Transaction	Shares	Change %	Date	Ownership	Footnotes
transaction	MBCN	Common Stock	Disposed to Issuer	-5,929	-100%	02 Mar 2026	Direct	F2
transaction	MBCN	Common Stock	Disposed to Issuer	-4,706	-100%	02 Mar 2026	Direct	F1, F2
transaction	MBCN	Common Stock	Disposed to Issuer	-1,372	-100%	02 Mar 2026	held by spouse in retirement account	F2

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

JAMES J. MCCASKEY is no longer subject to Section 16 filing requirements. Form 4 or Form 5 obligations may continue.

Explanation of Responses:

Id	Content
F1	Includes shares held jointly with spouse.
F2	Disposed of pursuant to the Agreement and Plan of Merger, dated October 22, 2025 (the "Agreement"), by and between Middlefield Banc Corp. ("Middlefield") and Farmers National Banc Corp. ("Farmers"), pursuant when Middlefield merged with and into Farmers on March 2, 2026 (the "Closing Date"). Pursuant to the Agreement each share of Middlefield common stock issued and outstanding immediately prior to the effective time of the Merger (the "Effective Time") (other than certain shares held by Middlefield or Farmers) was converted into the right to receive 2.6 shares (the "Exchange Ration") of Farmers common stock.

Content

Includes shares held jointly with spouse.

Disposed of pursuant to the Agreement and Plan of Merger, dated October 22, 2025 (the "Agreement"), by and between Middlefield Banc Corp. ("Middlefield") and Farmers National Banc Corp. ("Farmers"), pursuant when Middlefield merged with and into Farmers on March 2, 2026 (the "Closing Date"). Pursuant to the Agreement each share of Middlefield common stock issued and outstanding immediately prior to the effective time of the Merger (the "Effective Time") (other than certain shares held by Middlefield or Farmers) was converted into the right to receive 2.6 shares (the "Exchange Ration") of Farmers common stock.