<SEC-DOCUMENT>0000892712-24-000144-index.html : 20250221
<SEC-HEADER>0000892712-24-000144.hdr.sgml : 20250221
<ACCEPTANCE-DATETIME>20241220163634
<PRIVATE-TO-PUBLIC>
ACCESSION NUMBER:		0000892712-24-000144
CONFORMED SUBMISSION TYPE:	CORRESP
PUBLIC DOCUMENT COUNT:		3
FILED AS OF DATE:		20241220

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			FIRST BUSINESS FINANCIAL SERVICES, INC.
		CENTRAL INDEX KEY:			0001521951
		STANDARD INDUSTRIAL CLASSIFICATION:	STATE COMMERCIAL BANKS [6022]
		ORGANIZATION NAME:           	02 Finance
		IRS NUMBER:				391576570
		STATE OF INCORPORATION:			WI
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		CORRESP

	BUSINESS ADDRESS:	
		STREET 1:		401 CHARMANY DRIVE
		CITY:			MADISON
		STATE:			WI
		ZIP:			53719
		BUSINESS PHONE:		608-238-8008

	MAIL ADDRESS:	
		STREET 1:		401 CHARMANY DRIVE
		STREET 2:		PO BOX 44961
		CITY:			MADISON
		STATE:			WI
		ZIP:			53744

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	First Business Financial Services, Inc.
		DATE OF NAME CHANGE:	20110527
</SEC-HEADER>
<DOCUMENT>
<TYPE>CORRESP
<SEQUENCE>1
<FILENAME>filename1.htm
<TEXT>
Document 1 - file: filename1.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>image_001.gif
<DESCRIPTION>GRAPHIC
<TEXT>
Document 2 - file: image_001.gif

</DOCUMENT>
<DOCUMENT>
<TYPE>CORRESP
<SEQUENCE>3
<FILENAME>filename3.pdf
<TEXT>
Document 3 - file: filename3.pdf

</DOCUMENT>
</SEC-DOCUMENT>