EXHIBIT 32.1
CERTIFICATIONS PURSUANT TO
18 U.S.C. SECTION 1350,
AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002
In connection with the Annual Report of Byline Bancorp, Inc. (the “Company”) on Form 10-K for the year ended December 31, 2017 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), the undersigned, the Chief Executive Officer and Chief Financial Officer of the Company, each hereby certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to his or her knowledge:
1.The Report fully complies with the requirements of Sections 13(a) or 15(d) of the Securities Exchange Act of 1934; and
2.The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.
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| /s/ | Alberto J. Paracchini |
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| Alberto J. Paracchini |
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| President and Chief Executive Officer |
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| (Principal Executive Officer) |
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| March 29, 2018 |
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|
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| /s/ | Lindsay Corby |
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| Lindsay Corby |
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| Executive Vice President & Chief Financial Officer |
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| (Principal Financial Officer) |
|
| March 29, 2018 |
