    <SEC-DOCUMENT>0001446114-21-000051-index.html : 20211110
    <SEC-HEADER>0001446114-21-000051.hdr.sgml : 20211110
    <ACCEPTANCE-DATETIME>20211110153235
    ACCESSION NUMBER:		0001446114-21-000051
    CONFORMED SUBMISSION TYPE:	SC 13D
    PUBLIC DOCUMENT COUNT:		3
    FILED AS OF DATE:		20211110
    DATE AS OF CHANGE:		20211110

    SUBJECT COMPANY:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			MIDDLEFIELD BANC CORP
    		CENTRAL INDEX KEY:			0000836147
    		STANDARD INDUSTRIAL CLASSIFICATION:	STATE COMMERCIAL BANKS [6022]
    		IRS NUMBER:				341585111
    		STATE OF INCORPORATION:			OH

    	FILING VALUES:
    		FORM TYPE:		SC 13D
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	005-86838
    		FILM NUMBER:		211396264

    	BUSINESS ADDRESS:
    		STREET 1:		15985 E HIGH ST
    		STREET 2:		P O BOX 35
    		CITY:			MIDDLEFILED
    		STATE:			OH
    		ZIP:			44062-9263
    		BUSINESS PHONE:		4406321666

    	MAIL ADDRESS:
    		STREET 1:		15985 EAST HIGH STREET
    		STREET 2:		P O BOX 35
    		CITY:			MIDDLEFIELD
    		STATE:			OH
    		ZIP:			44062-9263

    FILED BY:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			Ancora Advisors, LLC
    		CENTRAL INDEX KEY:			0001446114
    		IRS NUMBER:				331033773
    		STATE OF INCORPORATION:			OH
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		SC 13D

    	BUSINESS ADDRESS:
    		STREET 1:		6060 PARKLAND BOULEVARD, SUITE 200
    		CITY:			CLEVELAND
    		STATE:			OH
    		ZIP:			44124
    		BUSINESS PHONE:		2168254000

    	MAIL ADDRESS:
    		STREET 1:		6060 PARKLAND BOULEVARD, SUITE 200
    		CITY:			CLEVELAND
    		STATE:			OH
    		ZIP:			44124
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>SC 13D
    <SEQUENCE>1
    <FILENAME>mbcn11102021.htm
    <TEXT>
    Document 1 - file: mbcn11102021.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>2
    <FILENAME>letter11102021_1.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 2 - file: letter11102021_1.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>letter11102021_2.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 3 - file: letter11102021_2.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>