<SEC-DOCUMENT>0001104659-23-025324-index.html : 20230224
<SEC-HEADER>0001104659-23-025324.hdr.sgml : 20230224
<ACCEPTANCE-DATETIME>20230224162019
ACCESSION NUMBER:		0001104659-23-025324
CONFORMED SUBMISSION TYPE:	S-3/A
PUBLIC DOCUMENT COUNT:		3
FILED AS OF DATE:		20230224
DATE AS OF CHANGE:		20230224

FILER:

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

	FILING VALUES:
		FORM TYPE:		S-3/A
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-263296
		FILM NUMBER:		23667614

	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>S-3/A
<SEQUENCE>1
<FILENAME>tm237591d1_s3a.htm
<DESCRIPTION>S-3/A
<TEXT>
Document 1 - file: tm237591d1_s3a.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-23.1
<SEQUENCE>2
<FILENAME>tm237591d1_ex23-1.htm
<DESCRIPTION>EXHIBIT 23.1
<TEXT>
Document 2 - file: tm237591d1_ex23-1.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>tm237591d1_posamimg001.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 3 - file: tm237591d1_posamimg001.jpg

</DOCUMENT>
</SEC-DOCUMENT>