Sec Form 4 Filing - Hollinger Eric P @ MIDDLEFIELD BANC CORP - 2018-06-22

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Hollinger Eric P 2. Issuer Name and Ticker or Trading Symbol MIDDLEFIELD BANC CORP [ MBCN] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) EVP/Senior Lender (Last) (First) (Middle) 15985 EAST HIGH STREET 3. Date of Earliest Transaction (MM/DD/YY) 06/22/2018 (Street) MIDDLEFIELD, OH44062 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 06/22/2018( 1 ) A 528 A $ 51.6 528 D Common Stock 06/22/2018 F 150 D $ 51.6 378 D Common Stock 200 ( 2 ) D Common Stock 100 ( 3 ) D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Conditional Stock Award ( 4 ) $ 32.4 ( 4 ) 03/01/2019 Common Stock 458 458 D Conditional Stock Award ( 5 ) $ 38.6992 ( 5 ) 07/20/2020 Common Stock 408 408 D Conditonal Stock Award ( 6 ) $ 48.2 ( 6 ) 05/22/2021 Common Stock 688 688 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Hollinger Eric P 15985 EAST HIGH STREET MIDDLEFIELD, OH44062 EVP/Senior Lender Signatures Eric P. Hollingerby James R. Heslop, IIPower of Attorney 06/25/2018 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Shares were acquired under the terms of a Conditional Stock Grant dated June 22, 2015. ( 2 )Includes shares held jointly with spouse. ( 3 )Shares are held TOD spouse. ( 4 )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 8-K filing dated March 4, 2016. ( 5 )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 8-K filing dated July 20, 2017. ( 6 )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 8-K filing dated June 25, 2018.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

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