<SEC-DOCUMENT>0001047469-18-001377-index.html : 20180308
<SEC-HEADER>0001047469-18-001377.hdr.sgml : 20180308
<ACCEPTANCE-DATETIME>20180307190620
ACCESSION NUMBER:		0001047469-18-001377
CONFORMED SUBMISSION TYPE:	S-4/A
PUBLIC DOCUMENT COUNT:		23
FILED AS OF DATE:		20180308
DATE AS OF CHANGE:		20180307

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			BYLINE BANCORP, INC.
		CENTRAL INDEX KEY:			0001702750
		STANDARD INDUSTRIAL CLASSIFICATION:	STATE COMMERCIAL BANKS [6022]
		IRS NUMBER:				363012593

	FILING VALUES:
		FORM TYPE:		S-4/A
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-222935
		FILM NUMBER:		18674649

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		773-244-7000

	MAIL ADDRESS:	
		STREET 1:		180 NORTH LASALLE STREET, SUITE 300
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60601
</SEC-HEADER>
<DOCUMENT>
<TYPE>S-4/A
<SEQUENCE>1
<FILENAME>a2234518zs-4a.htm
<DESCRIPTION>S-4/A
<TEXT>
Document 1 - file: a2234518zs-4a.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-8.1
<SEQUENCE>2
<FILENAME>a2234518zex-8_1.htm
<DESCRIPTION>EX-8.1
<TEXT>
Document 2 - file: a2234518zex-8_1.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-8.2
<SEQUENCE>3
<FILENAME>a2234518zex-8_2.htm
<DESCRIPTION>EX-8.2
<TEXT>
Document 3 - file: a2234518zex-8_2.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-23.1
<SEQUENCE>4
<FILENAME>a2234518zex-23_1.htm
<DESCRIPTION>EX-23.1
<TEXT>
Document 4 - file: a2234518zex-23_1.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-23.2
<SEQUENCE>5
<FILENAME>a2234518zex-23_2.htm
<DESCRIPTION>EX-23.2
<TEXT>
Document 5 - file: a2234518zex-23_2.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-23.3
<SEQUENCE>6
<FILENAME>a2234518zex-23_3.htm
<DESCRIPTION>EX-23.3
<TEXT>
Document 6 - file: a2234518zex-23_3.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.3
<SEQUENCE>7
<FILENAME>a2234518zex-99_3.htm
<DESCRIPTION>EX-99.3
<TEXT>
Document 7 - file: a2234518zex-99_3.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.4
<SEQUENCE>8
<FILENAME>a2234518zex-99_4.htm
<DESCRIPTION>EX-99.4
<TEXT>
Document 8 - file: a2234518zex-99_4.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>9
<FILENAME>g931030.jpg
<DESCRIPTION>G931030.JPG
<TEXT>
Document 9 - file: g931030.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>10
<FILENAME>g420273.jpg
<DESCRIPTION>G420273.JPG
<TEXT>
Document 10 - file: g420273.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>11
<FILENAME>g126809.jpg
<DESCRIPTION>G126809.JPG
<TEXT>
Document 11 - file: g126809.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>12
<FILENAME>g746354.jpg
<DESCRIPTION>G746354.JPG
<TEXT>
Document 12 - file: g746354.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>13
<FILENAME>g827177.jpg
<DESCRIPTION>G827177.JPG
<TEXT>
Document 13 - file: g827177.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>14
<FILENAME>g329698.jpg
<DESCRIPTION>G329698.JPG
<TEXT>
Document 14 - file: g329698.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>15
<FILENAME>g203639.jpg
<DESCRIPTION>G203639.JPG
<TEXT>
Document 15 - file: g203639.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>16
<FILENAME>g199435.jpg
<DESCRIPTION>G199435.JPG
<TEXT>
Document 16 - file: g199435.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>17
<FILENAME>g50852lai001.gif
<DESCRIPTION>G50852LAI001.GIF
<TEXT>
Document 17 - file: g50852lai001.gif

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>18
<FILENAME>g50852mpi001.gif
<DESCRIPTION>G50852MPI001.GIF
<TEXT>
Document 18 - file: g50852mpi001.gif

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>19
<FILENAME>g50852mpi002.gif
<DESCRIPTION>G50852MPI002.GIF
<TEXT>
Document 19 - file: g50852mpi002.gif

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>20
<FILENAME>g50852mpi003.gif
<DESCRIPTION>G50852MPI003.GIF
<TEXT>
Document 20 - file: g50852mpi003.gif

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>21
<FILENAME>g50852mqi001.gif
<DESCRIPTION>G50852MQI001.GIF
<TEXT>
Document 21 - file: g50852mqi001.gif

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>22
<FILENAME>g50852mqi002.gif
<DESCRIPTION>G50852MQI002.GIF
<TEXT>
Document 22 - file: g50852mqi002.gif

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>23
<FILENAME>g50852mqi003.gif
<DESCRIPTION>G50852MQI003.GIF
<TEXT>
Document 23 - file: g50852mqi003.gif

</DOCUMENT>
</SEC-DOCUMENT>