<SEC-DOCUMENT>0001673321-26-000010-index.html : 20260511
<SEC-HEADER>0001673321-26-000010.hdr.sgml : 20260511
<ACCEPTANCE-DATETIME>20260511155558
ACCESSION NUMBER:		0001673321-26-000010
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20260511
FILED AS OF DATE:		20260511
DATE AS OF CHANGE:		20260511

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Pilmer Donald
		CENTRAL INDEX KEY:			0001673321
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-10537
		FILM NUMBER:		26962884

	MAIL ADDRESS:	
		STREET 1:		37 S. RIVER ST.
		CITY:			AURORA
		STATE:			IL
		ZIP:			60506

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			OLD SECOND BANCORP INC
		CENTRAL INDEX KEY:			0000357173
		STANDARD INDUSTRIAL CLASSIFICATION:	STATE COMMERCIAL BANKS [6022]
		ORGANIZATION NAME:           	02 Finance
		EIN:				363143493
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	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>4
<SEQUENCE>1
<FILENAME>form4-05112026_070554.xml
<TEXT>
Document 1 - file: form4-05112026_070554.html

Document 1 - RAW XML: form4-05112026_070554.xml

</DOCUMENT>
</SEC-DOCUMENT>