MICHAEL RANTTILA - 14 Jan 2026 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
14 Jan 2026
Net transactions value
+$35,846
Form type
4
Filing time
16 Jan 2026, 10:00:39 UTC
Previous filing
18 Dec 2025
Next filing
25 Feb 2026
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 16 Jan 2026 0001792684

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction MBCN Common Stock Award $50,956 +1,477 +8% $34.50 19,957 14 Jan 2026 Direct F1, F2
transaction MBCN Common Stock Tax liability $15,111 -438 -2.2% $34.50 19,519 14 Jan 2026 Direct F2
holding MBCN Common Stock 50 14 Jan 2026 as Custodian for Grandson
holding MBCN Common Stock 300 14 Jan 2026 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 14 Jan 2026 Common Stock 3,014 Direct F3, F5
holding MBCN Conditional Stock Award 2,956 14 Jan 2026 Common Stock 2,956 Direct F4, F5
* 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 January 14, 2025. The shares vested on the first anniversary of the grant.
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 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.
F5 Each restricted stock unit represents the right to receive, at settlement, one share of common stock.