<SEC-DOCUMENT>0001193125-22-167294-index.html : 20220603 <SEC-HEADER>0001193125-22-167294.hdr.sgml : 20220603 <ACCEPTANCE-DATETIME>20220603160154 ACCESSION NUMBER: 0001193125-22-167294 CONFORMED SUBMISSION TYPE: 497 PUBLIC DOCUMENT COUNT: 2 FILED AS OF DATE: 20220603 DATE AS OF CHANGE: 20220603 EFFECTIVENESS DATE: 20220603 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: 497 SEC ACT: 1933 Act SEC FILE NUMBER: 002-57354 FILM NUMBER: 22994242 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>S000075512 <SERIES-NAME>BlackRock Impact Municipal Fund <CLASS-CONTRACT> <CLASS-CONTRACT-ID>C000234660 <CLASS-CONTRACT-NAME>Investor A </CLASS-CONTRACT> <CLASS-CONTRACT> <CLASS-CONTRACT-ID>C000234661 <CLASS-CONTRACT-NAME>Institutional </CLASS-CONTRACT> <CLASS-CONTRACT> <CLASS-CONTRACT-ID>C000234662 <CLASS-CONTRACT-NAME>Class K </CLASS-CONTRACT> </SERIES> </EXISTING-SERIES-AND-CLASSES-CONTRACTS> </SERIES-AND-CLASSES-CONTRACTS-DATA> </SEC-HEADER> <DOCUMENT> <TYPE>497 <SEQUENCE>1 <FILENAME>d281796d497.htm <DESCRIPTION>BLACKROCK IMPACT MUNICIPAL FUND <TEXT> Document 1 - file: d281796d497.htm
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>2 <FILENAME>g281796g56p99.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 2 - file: g281796g56p99.jpg
</DOCUMENT> </SEC-DOCUMENT>