<SEC-DOCUMENT>0001752724-21-186214-index.html : 20210826 <SEC-HEADER>0001752724-21-186214.hdr.sgml : 20210826 <ACCEPTANCE-DATETIME>20210826094708 ACCESSION NUMBER: 0001752724-21-186214 CONFORMED SUBMISSION TYPE: NPORT-P PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20210630 FILED AS OF DATE: 20210826 PERIOD START: 20210630 FILER: COMPANY DATA: COMPANY CONFORMED NAME: BLACKROCK MUNICIPAL BOND FUND, INC. CENTRAL INDEX KEY: 0000225635 IRS NUMBER: 132896246 STATE OF INCORPORATION: NJ FISCAL YEAR END: 0630 FILING VALUES: FORM TYPE: NPORT-P SEC ACT: 1940 Act SEC FILE NUMBER: 811-02688 FILM NUMBER: 211209310 BUSINESS ADDRESS: STREET 1: 100 BELLEVUE PARKWAY CITY: WILMINGTON STATE: DE ZIP: 19809 BUSINESS PHONE: 800-441-7762 MAIL ADDRESS: STREET 1: 100 BELLEVUE PARKWAY CITY: WILMINGTON STATE: DE ZIP: 19809 FORMER COMPANY: FORMER CONFORMED NAME: MERRILL LYNCH MUNICIPAL BOND FUND INC DATE OF NAME CHANGE: 19920703 FORMER COMPANY: FORMER CONFORMED NAME: ONE LIBERTY MUNICIPAL BOND FUND INC DATE OF NAME CHANGE: 19780622 <SERIES-AND-CLASSES-CONTRACTS-DATA> <EXISTING-SERIES-AND-CLASSES-CONTRACTS> <SERIES> <OWNER-CIK>0000225635 <SERIES-ID>S000002334 <SERIES-NAME>BlackRock National Municipal Fund <CLASS-CONTRACT> <CLASS-CONTRACT-ID>C000006118 <CLASS-CONTRACT-NAME>Investor A </CLASS-CONTRACT> <CLASS-CONTRACT> <CLASS-CONTRACT-ID>C000006121 <CLASS-CONTRACT-NAME>Institutional </CLASS-CONTRACT> <CLASS-CONTRACT> <CLASS-CONTRACT-ID>C000038033 <CLASS-CONTRACT-NAME>Investor C </CLASS-CONTRACT> <CLASS-CONTRACT> <CLASS-CONTRACT-ID>C000100249 <CLASS-CONTRACT-NAME>Service Shares </CLASS-CONTRACT> <CLASS-CONTRACT> <CLASS-CONTRACT-ID>C000100250 <CLASS-CONTRACT-NAME>Class K </CLASS-CONTRACT> </SERIES> </EXISTING-SERIES-AND-CLASSES-CONTRACTS> </SERIES-AND-CLASSES-CONTRACTS-DATA> </SEC-HEADER> <DOCUMENT> <TYPE>NPORT-P <SEQUENCE>1 <FILENAME>primary_doc.xml <TEXT> Document 1 - file: primary_doc.html
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