# EDGAR Filing Document

**Accession Number:** 0000836147
**File Stem:** 9999999995-23-000232
**Filing Date:** 2023-1
**Character Count:** 1318
**Document Hash:** eb568c0d6eb206a9da589303ddcbb16b
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**9999999995-23-000232.hdr.sgml**: 20230201

**ACCESSION NUMBER**: 9999999995-23-000232

**CONFORMED SUBMISSION TYPE**: EFFECT

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20230131

**DATE AS OF CHANGE**: 20230201

**EFFECTIVENESS DATE**: 20230131

**FILER**: 

**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
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** EFFECT
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-266694
- **FILM NUMBER:** 23574601

**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

### UNITED STATES
### SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## Notice of Effectiveness

**Date:** January 31, 2023

**Accession Number:** 0001193125-23-015017

**Form Type:** POS AM

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**CIK:** 0000836147

**Company Name:** MIDDLEFIELD BANC CORP

**File Number:** 333-266694