<SEC-DOCUMENT>0000357173-23-000064-index.html : 20230824
<SEC-HEADER>0000357173-23-000064.hdr.sgml : 20230824
<ACCEPTANCE-DATETIME>20230824162556
ACCESSION NUMBER:		0000357173-23-000064
CONFORMED SUBMISSION TYPE:	S-3/A
PUBLIC DOCUMENT COUNT:		7
FILED AS OF DATE:		20230824
DATE AS OF CHANGE:		20230824

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			OLD SECOND BANCORP INC
		CENTRAL INDEX KEY:			0000357173
		STANDARD INDUSTRIAL CLASSIFICATION:	STATE COMMERCIAL BANKS [6022]
		IRS NUMBER:				363143493
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		S-3/A
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-274068
		FILM NUMBER:		231202504

	BUSINESS ADDRESS:	
		STREET 1:		37 S RIVER ST
		CITY:			AURORA
		STATE:			IL
		ZIP:			60507
		BUSINESS PHONE:		6308920202

	MAIL ADDRESS:	
		STREET 1:		37 SOUTH RIVER STREET
		CITY:			AURORA
		STATE:			IL
		ZIP:			60507
</SEC-HEADER>
<DOCUMENT>
<TYPE>S-3/A
<SEQUENCE>1
<FILENAME>tmb-20230824xs3a.htm
<DESCRIPTION>S-3/A
<TEXT>
Document 1 - file: tmb-20230824xs3a.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-4
<SEQUENCE>2
<FILENAME>tmb-20230824xex4.htm
<DESCRIPTION>EX-4
<TEXT>
Document 2 - file: tmb-20230824xex4.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-5
<SEQUENCE>3
<FILENAME>tmb-20230824xex5.htm
<DESCRIPTION>EX-5
<TEXT>
Document 3 - file: tmb-20230824xex5.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-23
<SEQUENCE>4
<FILENAME>tmb-20230824xex23.htm
<DESCRIPTION>EX-23
<TEXT>
Document 4 - file: tmb-20230824xex23.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-FILING FEES
<SEQUENCE>5
<FILENAME>tmb-20230824xexfilingfees.htm
<DESCRIPTION>EX-FILING FEES
<TEXT>
Document 5 - file: tmb-20230824xexfilingfees.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>6
<FILENAME>tmb-20230824xex5001.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 6 - file: tmb-20230824xex5001.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>7
<FILENAME>tmb-20230824xs3a001.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 7 - file: tmb-20230824xs3a001.jpg

</DOCUMENT>
</SEC-DOCUMENT>