EX-32.1 4 by-ex321_6.htm EX-32.1

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 Quarterly Report of Byline Bancorp, Inc. (the “Company”) on Form 10-Q for the period ended September 30, 2020 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.

| /s/ | Alberto J. Paracchini
|  | Alberto J. Paracchini
|  | President and Chief Executive Officer
|  | (Principal Executive Officer)
|  | November 06, 2020
| /s/ | Lindsay Corby
|  | Lindsay Corby
|  | Executive Vice President & Chief Financial Officer
|  | (Principal Financial Officer)
|  | November 06, 2020